print_settings.c

Go to the documentation of this file.

/*
    This file is part of darktable,
    Copyright (C) 2014-2018, 2020-2022 Pascal Obry.
    Copyright (C) 2015 Jérémy Rosen.
    Copyright (C) 2015-2016 Roman Lebedev.
    Copyright (C) 2015-2020 Tobias Ellinghaus.
    Copyright (C) 2017-2018, 2021-2022 Dan Torop.
    Copyright (C) 2017, 2019, 2022 luzpaz.
    Copyright (C) 2018 Maurizio Paglia.
    Copyright (C) 2018 rawfiner.
    Copyright (C) 2019 Denis Dyakov.
    Copyright (C) 2019 Edgardo Hoszowski.
    Copyright (C) 2019 jakubfi.
    Copyright (C) 2019 Pascal de Bruijn.
    Copyright (C) 2019 Philippe Weyland.
    Copyright (C) 2020, 2022 Aldric Renaudin.
    Copyright (C) 2020-2022 Diederik Ter Rahe.
    Copyright (C) 2020 Hubert Kowalski.
    Copyright (C) 2020 JP Verrue.
    Copyright (C) 2021 Ralf Brown.
    Copyright (C) 2022, 2025 Aurélien PIERRE.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2022 Miloš Komarčević.
    Copyright (C) 2022 Victor Forsiuk.
    
    darktable is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    darktable is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "common/darktable.h"
#include <glib.h>
 
#include "bauhaus/bauhaus.h"
#include "common/collection.h"
#include "common/colorspaces.h"
#include "common/cups_print.h"
#include "common/file_location.h"
#include "common/image_cache.h"
#include "common/metadata.h"
#include "common/pdf.h"
#include "common/printprof.h"
#include "common/printing.h"
#include "common/styles.h"
#include "common/tags.h"
#include "common/variables.h"
#include "control/jobs.h"
#include "dtgtk/resetlabel.h"
 
#include "gui/drag_and_drop.h"
#include "gui/gtk.h"
#include "libs/lib.h"
#include "libs/lib_api.h"
 
DT_MODULE(4)
 
const char *name(struct dt_lib_module_t *self)
{
  return _("print settings");
}
 
const char **views(dt_lib_module_t *self)
{
  static const char *v[] = {"print", NULL};
  return v;
}
 
uint32_t container(dt_lib_module_t *self)
{
  return DT_UI_CONTAINER_PANEL_RIGHT_CENTER;
}
 
typedef enum _set_controls
{
  BOX_LEFT   = 1 << 0,
  BOX_RIGHT  = 1 << 1,
  BOX_TOP    = 1 << 2,
  BOX_BOTTOM = 1 << 3,
  BOX_TOP_LEFT     = BOX_LEFT | BOX_TOP,
  BOX_TOP_RIGHT    = BOX_RIGHT | BOX_TOP,
  BOX_BOTTOM_LEFT  = BOX_LEFT | BOX_BOTTOM,
  BOX_BOTTOM_RIGHT = BOX_RIGHT | BOX_BOTTOM,
  BOX_ALL          = BOX_LEFT | BOX_RIGHT | BOX_TOP | BOX_BOTTOM
} dt_box_control_set;
 
typedef enum _unit_t
{
  UNIT_MM = 0,
  UNIT_CM,
  UNIT_IN,
  UNIT_N // needs to be the last one
} _unit_t;
 
 
static const float units[UNIT_N] = { 1.0f, 0.1f, 1.0f/25.4f };
static const gchar *_unit_names[] = { N_("mm"), N_("cm"), N_("inch"), NULL };
 
typedef struct dt_lib_print_settings_t
{
  GtkWidget *profile, *intent, *style, *papers, *media;
  GtkWidget *printers, *orientation, *pprofile, *pintent;
  GtkWidget *width, *height, *black_point_compensation;
  GtkWidget *info;
  GtkWidget *b_x, *b_y;
  GtkWidget *b_width, *b_height;
  GtkWidget *del;
  GtkWidget *grid, *grid_size, *snap_grid;
  GtkWidget *borderless;
  GList *profiles;
  GtkButton *print_button;
  GtkToggleButton *lock_button;
  GtkWidget *b_top, *b_bottom, *b_left, *b_right;
  GtkDarktableToggleButton *dtba[9];                                     // Alignment buttons
  GList *paper_list, *media_list;
  gboolean lock_activated;
  dt_print_info_t prt;
  dt_images_box imgs;
  _unit_t unit;
  int v_intent, v_pintent;
  int v_icctype, v_picctype;
  char *v_iccprofile, *v_piccprofile, *v_style;
  gboolean v_black_point_compensation;
 
  // for adding new area
  gboolean creation;
  gboolean dragging;
  float x1, y1, x2, y2;
  int selected;                    // selected area in imgs.box
  int last_selected;               // last selected area to edit
  dt_box_control_set sel_controls; // which border/corner is selected
  float click_pos_x, click_pos_y;
  gboolean has_changed;
} dt_lib_print_settings_t;
 
typedef struct dt_lib_print_job_t
{
  gchar *job_title;
  dt_print_info_t prt;
  gchar* style;
  gboolean black_point_compensation;
  dt_colorspaces_color_profile_type_t buf_icc_type, p_icc_type;
  gchar *buf_icc_profile, *p_icc_profile;
  dt_iop_color_intent_t buf_icc_intent, p_icc_intent;
  dt_images_box imgs;
  uint16_t *buf; // ??? should be removed
  dt_pdf_page_t *pdf_page;
  char pdf_filename[PATH_MAX];
} dt_lib_print_job_t;
 
typedef struct dt_lib_export_profile_t
{
  dt_colorspaces_color_profile_type_t type; // filename is only used for type DT_COLORSPACE_FILE
  char filename[512];                       // icc file name
  char name[512];                           // product name
  int  pos, ppos;                           // position in combo boxen
} dt_lib_export_profile_t;
 
typedef struct _dialog_description
{
  const char *name;
} dialog_description_t;
 
static void _update_slider(dt_lib_print_settings_t *ps);
static void _width_changed(GtkWidget *widget, gpointer user_data);
static void _height_changed(GtkWidget *widget, gpointer user_data);
static void _x_changed(GtkWidget *widget, gpointer user_data);
static void _y_changed(GtkWidget *widget, gpointer user_data);
 
int
position()
{
  return 990;
}
 
/* get paper dimension for the orientation (in mm) */
static void _get_page_dimension(dt_print_info_t *prt, float *width, float *height)
{
  if(prt->page.landscape)
  {
    *width = prt->paper.height;
    *height = prt->paper.width;
  }
  else
  {
    *width = prt->paper.width;
    *height = prt->paper.height;
  }
}
 
static void _precision_by_unit(_unit_t unit, int *n_digits, float *incr, char **format)
{
  // this gives us these precisions
  //  unit  precision  increment
  //   mm      1          1
  //   cm      0.1        0.1
  //   in      0.01       0.05
  //
  // This allows for >= 1mm precision display regardless of unit, and
  // allows for entering common fractions (e.g. 1/4 as .25) for
  // inches. Increment is kept to 1mm except in the cases of inches,
  // where we round up from 0.03937 (1mm) to 0.05 to keep to a factor
  // of a power of ten.
  *n_digits = ceilf(log10f(1.0f / units[unit]));
  if(incr)
  {
    *incr = roundf(units[unit] * 20.0f) / 20.0f;
  }
  if(format)
  {
    *format = g_strdup_printf("%%.%df", *n_digits);
  }
}
 
// unit conversion
 
static float _to_mm(dt_lib_print_settings_t *ps, double value)
{
  return value / units[ps->unit];
}
 
// horizontal mm to pixels
static float _mm_to_hscreen(dt_lib_print_settings_t *ps, const float value, const gboolean offset)
{
  float width, height;
  _get_page_dimension(&ps->prt, &width, &height);
 
  return (offset ? ps->imgs.screen.page.x : 0)
    + (ps->imgs.screen.page.width * value / width);
}
 
// vertical mm to pixels
static float _mm_to_vscreen(dt_lib_print_settings_t *ps, const float value, const gboolean offset)
{
  float width, height;
  _get_page_dimension(&ps->prt, &width, &height);
 
  return (offset ? ps->imgs.screen.page.y : 0)
    + (ps->imgs.screen.page.height * value / height);
}
 
static float _hscreen_to_mm(dt_lib_print_settings_t *ps, const float value, const gboolean offset)
{
  float width, height;
  _get_page_dimension(&ps->prt, &width, &height);
 
  return width * (value - (offset ? ps->imgs.screen.page.x : 0.0f))
    / ps->imgs.screen.page.width;
}
 
static float _vscreen_to_mm(dt_lib_print_settings_t *ps, const float value, const gboolean offset)
{
  float width, height;
  _get_page_dimension(&ps->prt, &width, &height);
 
  return height * (value - (offset ? ps->imgs.screen.page.y : 0.0f))
    / ps->imgs.screen.page.height;
}
 
 
static inline float _percent_unit_of(dt_lib_print_settings_t *ps, float ref, float value)
{
  return value * ref * units[ps->unit];
}
 
// callbacks for in-memory export
 
typedef struct dt_print_format_t
{
  dt_imageio_module_data_t head;
  int bpp;
  dt_lib_print_job_t *params;
} dt_print_format_t;
 
static int bpp(dt_imageio_module_data_t *data)
{
  const dt_print_format_t *d = (dt_print_format_t *)data;
  return d->bpp;
}
 
static int levels(dt_imageio_module_data_t *data)
{
  const dt_print_format_t *d = (dt_print_format_t *)data;
  return IMAGEIO_RGB | (d->bpp == 8 ? IMAGEIO_INT8 : IMAGEIO_INT16);
}
 
static const char *mime(dt_imageio_module_data_t *data)
{
  return "memory";
}
 
static int write_image(dt_imageio_module_data_t *data, const char *filename, const void *in,
                       dt_colorspaces_color_profile_type_t over_type, const char *over_filename,
                       void *exif, int exif_len, int32_t imgid, int num, int total, dt_dev_pixelpipe_t *pipe,
                       const gboolean export_masks)
{
  dt_print_format_t *d = (dt_print_format_t *)data;
 
  d->params->buf = (uint16_t *)malloc((size_t)3 * (d->bpp == 8?1:2) * d->head.width * d->head.height);
 
  if(d->bpp == 8)
  {
    const uint8_t *in_ptr = (const uint8_t *)in;
    uint8_t *out_ptr = (uint8_t *)d->params->buf;
    for(int y = 0; y < d->head.height; y++)
    {
      for(int x = 0; x < d->head.width; x++, in_ptr += 4, out_ptr += 3)
        memcpy(out_ptr, in_ptr, 3);
    }
  }
  else
  {
    const uint16_t *in_ptr = (const uint16_t *)in;
    uint16_t *out_ptr = (uint16_t *)d->params->buf;
    for(int y = 0; y < d->head.height; y++)
    {
      for(int x = 0; x < d->head.width; x++, in_ptr += 4, out_ptr += 3)
        memcpy(out_ptr, in_ptr, 6);
    }
  }
 
  return 0;
}
 
// export image imgid with given max_width & max_height, set iwidth & iheight with the
// final image size as exported.
static int _export_image(dt_job_t *job, dt_image_box *img)
{
  dt_lib_print_job_t *params = dt_control_job_get_params(job);
 
  dt_imageio_module_format_t buf;
  buf.mime = mime;
  buf.levels = levels;
  buf.bpp = bpp;
  buf.write_image = write_image;
 
  dt_print_format_t dat;
  dat.head.max_width = img->max_width;
  dat.head.max_height = img->max_height;
  dat.head.style[0] = '\0';
  dat.bpp = *params->p_icc_profile ? 16 : 8; // set to 16bit when a profile is to be applied
  dat.params = params;
 
  if(params->style) g_strlcpy(dat.head.style, params->style, sizeof(dat.head.style));
 
  // let the user know something is happening
  dt_control_job_set_progress(job, 0.05);
  dt_control_log(_("processing `%s' for `%s'"), params->job_title, params->prt.printer.name);
 
  const gboolean export_masks = FALSE;
  const gboolean is_scaling = FALSE;
 
  dt_imageio_export_with_flags
    (img->imgid, "unused", &buf, (dt_imageio_module_data_t *)&dat, TRUE, FALSE,
     TRUE, is_scaling, FALSE, NULL, FALSE, export_masks, params->buf_icc_type,
     params->buf_icc_profile, params->buf_icc_intent,  NULL, NULL, 1, 1, NULL, NULL);
 
  img->exp_width = dat.head.width;
  img->exp_height = dat.head.height;
 
  // we have the exported buffer, let's apply the printer profile
 
  const dt_colorspaces_color_profile_t *buf_profile =
    dt_colorspaces_get_output_profile(img->imgid,
                                      &params->buf_icc_type,
                                      params->buf_icc_profile);
  if(*params->p_icc_profile)
  {
    const dt_colorspaces_color_profile_t *pprof =
      dt_colorspaces_get_profile(params->p_icc_type, params->p_icc_profile,
                                 DT_PROFILE_DIRECTION_OUT);
    if(IS_NULL_PTR(pprof))
    {
      dt_control_log(_("cannot open printer profile `%s'"), params->p_icc_profile);
      fprintf(stderr, "cannot open printer profile `%s'\n", params->p_icc_profile);
      dt_control_queue_redraw();
      return 1;
    }
    else
    {
      if(IS_NULL_PTR(buf_profile) || IS_NULL_PTR(buf_profile->profile))
      {
        dt_control_log(_("error getting output profile for image %d"), img->imgid);
        fprintf(stderr, "error getting output profile for image %d\n", img->imgid);
        dt_control_queue_redraw();
        return 1;
      }
      if(dt_apply_printer_profile
         ((void **)&(params->buf), dat.head.width, dat.head.height, dat.bpp, buf_profile->profile,
          pprof->profile, params->p_icc_intent, params->black_point_compensation))
      {
        dt_control_log(_("cannot apply printer profile `%s'"), params->p_icc_profile);
        fprintf(stderr, "cannot apply printer profile `%s'\n", params->p_icc_profile);
        dt_control_queue_redraw();
        return 1;
      }
    }
  }
 
  img->buf = params->buf;
  params->buf = NULL;
 
  return 0;
}
 
static void _create_pdf(dt_job_t *job, dt_images_box imgs, const float width, const float height)
{
  dt_lib_print_job_t *params = dt_control_job_get_params(job);
 
  const float page_width  = dt_pdf_mm_to_point(width);
  const float page_height = dt_pdf_mm_to_point(height);
  const int icc_id = 0;
 
  dt_pdf_image_t *pdf_image[MAX_IMAGE_PER_PAGE];
 
  // create the PDF page
  dt_pdf_t *pdf = dt_pdf_start(params->pdf_filename, page_width, page_height,
                               params->prt.printer.resolution, DT_PDF_STREAM_ENCODER_FLATE);
 
/*
  // ??? should a profile be embedded here?
  if (*printer_profile)
    icc_id = dt_pdf_add_icc(pdf, printer_profile);
*/
  int32_t count = 0;
 
  for(int k=0; k<imgs.count; k++)
  {
    const int resolution = params->prt.printer.resolution;
    const dt_image_box *box = &imgs.box[k];
 
    if(box->imgid > UNKNOWN_IMAGE)
    {
      pdf_image[count] =
        dt_pdf_add_image(pdf, (uint8_t *)box->buf, box->exp_width, box->exp_height,
                         8, icc_id, 0.0);
 
      //  PDF bounding-box has origin on bottom-left
      pdf_image[count]->bb_x      = dt_pdf_pixel_to_point(box->print.x, resolution);
      pdf_image[count]->bb_y      = dt_pdf_pixel_to_point(box->print.y, resolution);
      pdf_image[count]->bb_width  = dt_pdf_pixel_to_point(box->print.width, resolution);
      pdf_image[count]->bb_height = dt_pdf_pixel_to_point(box->print.height, resolution);
      count++;
    }
  }
 
  params->pdf_page = dt_pdf_add_page(pdf, pdf_image, count);
  dt_pdf_finish(pdf, &params->pdf_page, 1);
 
  // now releases all the buf
  for(int k=0; k<imgs.count; k++)
  {
    dt_image_box *box = &imgs.box[k];
    dt_free(box->buf);
  }
}
 
void _fill_box_values(dt_lib_print_settings_t *ps)
{
  float x = 0.0f, y = 0.0f, swidth = 0.0f, sheight = 0.0f;
 
  if(ps->last_selected != -1)
  {
    dt_image_box *box = &ps->imgs.box[ps->last_selected];
 
    float width, height;
    _get_page_dimension(&ps->prt, &width, &height);
 
    x       = _percent_unit_of(ps, width, box->pos.x);
    y       = _percent_unit_of(ps, height, box->pos.y);
    swidth  = _percent_unit_of(ps, width, box->pos.width);
    sheight = _percent_unit_of(ps, height, box->pos.height);
 
    for(int i=0; i<9; i++)
    {
      ++darktable.gui->reset;
      gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->dtba[i]), (i == box->alignment));
      --darktable.gui->reset;
    }
  }
 
  ++darktable.gui->reset;
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_x), x);
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_y), y);
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_width), swidth);
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_height), sheight);
 
  --darktable.gui->reset;
}
 
static int _export_and_setup_pos(dt_job_t *job, dt_image_box *img, const int32_t idx)
{
  dt_lib_print_job_t *params = dt_control_job_get_params(job);
 
  float width, height;
  _get_page_dimension(&params->prt, &width, &height);
 
  dt_printing_setup_page(&params->imgs, width, height, params->prt.printer.resolution);
 
  dt_print(DT_DEBUG_PRINT, "[print] max image size %d x %d (at resolution %d)\n",
           img->max_width, img->max_height, params->prt.printer.resolution);
 
  if(_export_image(job, img)) return 1;
 
  dt_printing_setup_image(&params->imgs, idx,
                          img->imgid, img->exp_width, img->exp_height, img->alignment);
 
  return 0;
}
 
static int _print_job_run(dt_job_t *job)
{
  dt_lib_print_job_t *params = dt_control_job_get_params(job);
 
  // get first image on a box, needed as print leader
 
  int32_t imgid = UNKNOWN_IMAGE;
 
  // compute the needed size for picture for the given printer resolution
 
  for(int k=0; k<params->imgs.count; k++)
  {
    if(params->imgs.box[k].imgid > UNKNOWN_IMAGE)
    {
      if(imgid == UNKNOWN_IMAGE) imgid = params->imgs.box[k].imgid;
      if(_export_and_setup_pos(job, &params->imgs.box[k], k))
        return 1;
    }
  }
 
  if(dt_control_job_get_state(job) == DT_JOB_STATE_CANCELLED) return 0;
  dt_control_job_set_progress(job, 0.9);
 
  dt_loc_get_tmp_dir(params->pdf_filename, sizeof(params->pdf_filename));
  g_strlcat(params->pdf_filename, "/pf.XXXXXX.pdf", sizeof(params->pdf_filename));
 
  const gint fd = g_mkstemp(params->pdf_filename);
  if(fd == -1)
  {
    dt_control_log(_("failed to create temporary pdf for printing"));
    fprintf(stderr, "failed to create temporary pdf for printing\n");
    return 1;
  }
  close(fd);
 
  float width, height;
  _get_page_dimension(&params->prt, &width, &height);
 
  _create_pdf(job, params->imgs, width, height);
 
  if(dt_control_job_get_state(job) == DT_JOB_STATE_CANCELLED) return 0;
  dt_control_job_set_progress(job, 0.95);
 
  // send to CUPS
 
  dt_print_file(imgid, params->pdf_filename, params->job_title, &params->prt);
  dt_control_job_set_progress(job, 1.0);
 
  // add tag for this image
 
  char tag[256] = { 0 };
  guint tagid = 0;
  snprintf (tag, sizeof(tag), "darktable|printed|%s", params->prt.printer.name);
  dt_tag_new(tag, &tagid);
 
  for(int k=0; k<params->imgs.count; k++)
  {
    if(params->imgs.box[k].imgid > UNKNOWN_IMAGE)
      if(dt_tag_attach(tagid, params->imgs.box[k].imgid, FALSE, FALSE))
        DT_DEBUG_CONTROL_SIGNAL_RAISE(darktable.signals, DT_SIGNAL_TAG_CHANGED);
 
    /* register print timestamp in cache */
    dt_image_cache_set_print_timestamp(darktable.image_cache, params->imgs.box[k].imgid);
  }
 
  return 0;
}
 
static void _page_new_area_clicked(GtkWidget *widget, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(ps->imgs.count == MAX_IMAGE_PER_PAGE)
  {
    dt_control_log(_("maximum image per page reached"));
    return;
  }
 
  dt_control_change_cursor(GDK_PLUS);
  ps->creation = TRUE;
  ps->has_changed = TRUE;
}
 
static void _page_clear_area_clicked(GtkWidget *widget, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  ps->has_changed = TRUE;
  dt_printing_clear_boxes(&ps->imgs);
  gtk_widget_set_sensitive(ps->del, FALSE);
  dt_control_queue_redraw_center();
}
 
static void _page_delete_area(const dt_lib_module_t *self, const int box_index)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(box_index == -1) return;
 
  for(int k=box_index; k<MAX_IMAGE_PER_PAGE-1; k++)
  {
    memcpy(&ps->imgs.box[k], &ps->imgs.box[k+1], sizeof(dt_image_box));
  }
  ps->last_selected = -1;
  ps->selected = -1;
  dt_printing_clear_box(&ps->imgs.box[MAX_IMAGE_PER_PAGE-1]);
  ps->imgs.count--;
 
  if(ps->imgs.count > 0)
    ps->selected = 0;
  else
    gtk_widget_set_sensitive(ps->del, FALSE);
 
  _fill_box_values(ps);
 
  ps->has_changed = TRUE;
  dt_control_queue_redraw_center();
}
 
static void _page_delete_area_clicked(GtkWidget *widget, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  _page_delete_area(self, ps->last_selected);
}
 
static void _print_job_cleanup(void *p)
{
  dt_lib_print_job_t *params = p;
  if(params->pdf_filename[0]) g_unlink(params->pdf_filename);
  dt_free(params->pdf_page);
  dt_free(params->buf);
  dt_free(params->style);
  dt_free(params->buf_icc_profile);
  dt_free(params->p_icc_profile);
  dt_free(params->job_title);
  dt_free(params);
}
 
static void _print_button_clicked(GtkWidget *widget, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  int32_t imgid = UNKNOWN_IMAGE;
 
  // at least one image on a box
 
  for(int k=0; k<ps->imgs.count; k++)
  {
    if(ps->imgs.box[k].imgid > UNKNOWN_IMAGE)
    {
      imgid = ps->imgs.box[k].imgid;
      break;
    }
  }
 
  if(imgid == UNKNOWN_IMAGE)
  {
    dt_control_log(_("cannot print until a picture is selected"));
    return;
  }
  if(strlen(ps->prt.printer.name) == 0 || ps->prt.printer.resolution == 0)
  {
    dt_control_log(_("cannot print until a printer is selected"));
    return;
  }
  if(ps->prt.paper.width == 0 || ps->prt.paper.height == 0)
  {
    dt_control_log(_("cannot print until a paper is selected"));
    return;
  }
 
  dt_job_t *job = dt_control_job_create(&_print_job_run, "print image %d", imgid);
  if(IS_NULL_PTR(job)) return;
 
  dt_lib_print_job_t *params = calloc(1, sizeof(dt_lib_print_job_t));
  dt_control_job_set_params(job, params, _print_job_cleanup);
 
  memcpy(&params->prt,  &ps->prt, sizeof(dt_print_info_t));
  memcpy(&params->imgs, &ps->imgs, sizeof(ps->imgs));
 
  // what to call the image?
  GList *res;
  if((res = dt_metadata_get(imgid, "Xmp.dc.title", NULL)) != NULL)
  {
    // FIXME: in metadata_view.c, non-printables are filtered, should we do this here?
    params->job_title = g_strdup((gchar *)res->data);
    g_list_free_full(res, dt_free_gpointer);
    res = NULL;
  }
  else
  {
    const dt_image_t *img = dt_image_cache_get(darktable.image_cache, imgid, 'r');
    if(IS_NULL_PTR(img))
    {
      // in this case no need to release from cache what we couldn't get
      dt_control_log(_("cannot get image %d for printing"), imgid);
      dt_control_job_dispose(job);
      return;
    }
    params->job_title = g_strdup(img->filename);
    dt_image_cache_read_release(darktable.image_cache, img);
  }
  // FIXME: ellipsize title/printer as the export completed message is ellipsized
  gchar *message = g_strdup_printf(_("processing `%s' for `%s'"), params->job_title, params->prt.printer.name);
  dt_control_job_add_progress(job, message, TRUE);
  dt_free(message);
 
  // FIXME: getting this from conf as w/prior code, but switch to getting from ps
  params->style = dt_conf_get_string("plugins/print/print/style");
 
  // FIXME: getting these from conf as w/prior code, but switch to getting them from ps
  params->buf_icc_type = dt_conf_get_int("plugins/print/print/icctype");
  params->buf_icc_profile = dt_conf_get_string("plugins/print/print/iccprofile");
  params->buf_icc_intent = dt_conf_get_int("plugins/print/print/iccintent");
 
  params->p_icc_type = ps->v_picctype;
  params->p_icc_profile = g_strdup(ps->v_piccprofile);
  params->p_icc_intent = ps->v_pintent;
  params->black_point_compensation = ps->v_black_point_compensation;
 
  dt_control_add_job(darktable.control, DT_JOB_QUEUE_USER_EXPORT, job);
}
 
static void _set_printer(const dt_lib_module_t *self, const char *printer_name)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  dt_get_printer_info(printer_name, &ps->prt.printer);
 
  // if this is a turboprint printer, disable the printer profile
 
  if(ps->prt.printer.is_turboprint)
    dt_bauhaus_combobox_set(ps->pprofile, 0);
 
  dt_conf_set_string("plugins/print/print/printer", printer_name);
 
  // add papers for the given printer
  dt_bauhaus_combobox_clear(ps->papers);
  if(ps->paper_list)
  {
    g_list_free_full(ps->paper_list, dt_free_gpointer);
    ps->paper_list = NULL;
  }
  ps->paper_list = dt_get_papers (&ps->prt.printer);
  for(const GList *papers = ps->paper_list; papers; papers = g_list_next (papers))
  {
    const dt_paper_info_t *p = (dt_paper_info_t *)papers->data;
    dt_bauhaus_combobox_add(ps->papers, p->common_name);
  }
  const char *default_paper = dt_conf_get_string_const("plugins/print/print/paper");
  if(!dt_bauhaus_combobox_set_from_text(ps->papers, default_paper))
    dt_bauhaus_combobox_set(ps->papers, 0);
 
  const gchar *paper_name = dt_bauhaus_combobox_get_text(ps->papers);
  if(paper_name)
  {
    const dt_paper_info_t *paper = dt_get_paper(ps->paper_list, paper_name);
    if(paper)
      memcpy(&ps->prt.paper, paper, sizeof(dt_paper_info_t));
  }
 
  // add corresponding supported media
  dt_bauhaus_combobox_clear(ps->media);
  if(ps->media_list)
  {
    g_list_free_full(ps->media_list, dt_free_gpointer);
    ps->media_list = NULL;
  }
  ps->media_list = dt_get_media_type(&ps->prt.printer);
  for(const GList *media = ps->media_list; media; media = g_list_next (media))
  {
    const dt_medium_info_t *m = (dt_medium_info_t *)media->data;
    dt_bauhaus_combobox_add(ps->media, m->common_name);
  }
  const char *default_medium = dt_conf_get_string_const("plugins/print/print/medium");
  if(!dt_bauhaus_combobox_set_from_text(ps->media, default_medium))
    dt_bauhaus_combobox_set(ps->media, 0);
 
  const gchar *medium_name = dt_bauhaus_combobox_get_text(ps->media);
  if(medium_name)
  {
    const dt_medium_info_t *medium = dt_get_medium(ps->media_list, medium_name);
    if(medium)
      memcpy(&ps->prt.medium, medium, sizeof(dt_medium_info_t));
  }
 
  if(ps->prt.paper.width > 0.0f && ps->prt.paper.height > 0.0f && ps->prt.printer.resolution > 0)
  {
    float width, height;
    _get_page_dimension(&ps->prt, &width, &height);
    dt_printing_setup_page(&ps->imgs, width, height, ps->prt.printer.resolution);
  }
 
  dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
}
 
static void
_printer_changed(GtkWidget *combo, const dt_lib_module_t *self)
{
  const gchar *printer_name = dt_bauhaus_combobox_get_text(combo);
 
  if(printer_name)
    _set_printer (self, printer_name);
}
 
static void
_paper_changed(GtkWidget *combo, const dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  const gchar *paper_name = dt_bauhaus_combobox_get_text(combo);
 
  if(IS_NULL_PTR(paper_name)) return;
 
  const dt_paper_info_t *paper = dt_get_paper(ps->paper_list, paper_name);
 
  if(paper)
    memcpy(&ps->prt.paper, paper, sizeof(dt_paper_info_t));
 
  float width, height;
  _get_page_dimension(&ps->prt, &width, &height);
 
  dt_printing_setup_page(&ps->imgs, width, height, ps->prt.printer.resolution);
 
  dt_conf_set_string("plugins/print/print/paper", paper_name);
  dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
 
  _update_slider(ps);
}
 
static void
_media_changed(GtkWidget *combo, const dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  const gchar *medium_name = dt_bauhaus_combobox_get_text(combo);
 
  if(IS_NULL_PTR(medium_name)) return;
 
  const dt_medium_info_t *medium = dt_get_medium(ps->media_list, medium_name);
 
  if(medium)
    memcpy(&ps->prt.medium, medium, sizeof(dt_medium_info_t));
 
  dt_conf_set_string("plugins/print/print/medium", medium_name);
  dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
 
  _update_slider(ps);
}
 
static void
_update_slider(dt_lib_print_settings_t *ps)
{
  dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
 
  // if widget are created, let's display the current image size
 
  // FIXME: why doesn't this update when units are changed?
  if(ps->selected != -1
     && ps->imgs.box[ps->selected].imgid != UNKNOWN_IMAGE
     && ps->width && ps->height
     && ps->info)
  {
    const dt_image_box *box = &ps->imgs.box[ps->selected];
 
    dt_image_pos box_size_mm, box_size;
    dt_printing_get_image_pos_mm(&ps->imgs, box, &box_size_mm);
    dt_printing_get_image_pos(&ps->imgs, box, &box_size);
 
    const double w = box_size_mm.width * units[ps->unit];
    const double h = box_size_mm.height * units[ps->unit];
    char *value, *precision;
    int n_digits;
    _precision_by_unit(ps->unit, &n_digits, NULL, &precision);
 
    value = g_strdup_printf(precision, w);
    gtk_label_set_text(GTK_LABEL(ps->width), value);
    dt_free(value);
 
    value = g_strdup_printf(precision, h);
    gtk_label_set_text(GTK_LABEL(ps->height), value);
    dt_free(value);
    dt_free(precision);
 
    // compute the image down/up scale and report information
 
    const float iwidth  = box->img_width;
    const float iheight = box->img_height;
    const float awidth  = box_size.width;
    const float aheight = box_size.height;
 
    const double scale = (iwidth <= awidth)
      ? awidth / iwidth
      : aheight/ iheight;
 
    value = g_strdup_printf(_("%3.2f (dpi:%d)"), scale,
                            scale <= 1.0
                            ? (int)ps->prt.printer.resolution
                            : (int)(ps->prt.printer.resolution / scale));
    gtk_label_set_text(GTK_LABEL(ps->info), value);
    dt_free(value);
  }
}
 
static void
_top_border_callback(GtkWidget *spin, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const double value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(spin));
 
  dt_conf_set_float("plugins/print/print/top_margin", value);
 
  ps->prt.page.margin_top = _to_mm(ps, value);
 
  if(ps->lock_activated == TRUE)
  {
    ps->prt.page.margin_bottom = _to_mm(ps, value);
    ps->prt.page.margin_left = _to_mm(ps, value);
    ps->prt.page.margin_right = _to_mm(ps, value);
 
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_bottom), value);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_left), value);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_right), value);
 
    dt_conf_set_float("plugins/print/print/bottom_margin", value);
    dt_conf_set_float("plugins/print/print/left_margin", value);
    dt_conf_set_float("plugins/print/print/right_margin", value);
  }
 
  _update_slider(ps);
}
 
static void
_bottom_border_callback(GtkWidget *spin, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const double value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(spin));
 
  dt_conf_set_float("plugins/print/print/bottom_margin", value);
 
  ps->prt.page.margin_bottom = _to_mm(ps, value);
  _update_slider(ps);
}
 
static void
_left_border_callback(GtkWidget *spin, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const double value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(spin));
 
  dt_conf_set_float("plugins/print/print/left_margin", value);
 
  ps->prt.page.margin_left = _to_mm(ps, value);
  _update_slider(ps);
}
 
static void
_right_border_callback(GtkWidget *spin, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const double value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(spin));
 
  dt_conf_set_float("plugins/print/print/right_margin", value);
 
  ps->prt.page.margin_right = _to_mm(ps, value);
  _update_slider(ps);
}
 
static void
_lock_callback(GtkWidget *button, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  ps->lock_activated = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button));
 
  dt_conf_set_bool("plugins/print/print/lock_borders", ps->lock_activated);
 
  gtk_widget_set_sensitive(GTK_WIDGET(ps->b_bottom), !ps->lock_activated);
  gtk_widget_set_sensitive(GTK_WIDGET(ps->b_left), !ps->lock_activated);
  gtk_widget_set_sensitive(GTK_WIDGET(ps->b_right), !ps->lock_activated);
 
  //  get value of top and set it to all other borders
 
  const double value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ps->b_top));
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_bottom), value);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_left), value);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_right), value);
 
  _update_slider (ps);
}
 
static void
_alignment_callback(GtkWidget *tb, gpointer user_data)
{
  if(darktable.gui->reset) return;
 
  int index=-1;
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  for(int i=0; i<9; i++)
  {
    /* block signal handler */
    g_signal_handlers_block_by_func(ps->dtba[i],_alignment_callback, user_data);
 
    if(GTK_WIDGET(ps->dtba[i]) == tb)
    {
      gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->dtba[i]), TRUE);
      index=i;
    }
    else gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->dtba[i]), FALSE);
 
    /* unblock signal handler */
    g_signal_handlers_unblock_by_func(ps->dtba[i], _alignment_callback, user_data);
  }
 
  if(ps->last_selected != -1)
  {
    dt_printing_setup_image(&ps->imgs, ps->last_selected,
                            ps->imgs.box[ps->last_selected].imgid, 100, 100, index);
  }
 
  _update_slider(ps);
}
 
static void
_orientation_changed(GtkWidget *combo, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  ps->prt.page.landscape = dt_bauhaus_combobox_get(combo);
 
  _update_slider(ps);
}
 
static void
_snap_grid_callback(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_control_queue_redraw_center();
}
 
static void
_grid_callback(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_control_queue_redraw_center();
}
 
static void _grid_size_changed(GtkWidget *widget, dt_lib_module_t *self)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const float value = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ps->grid_size));
  dt_conf_set_float("plugins/print/print/grid_size", _to_mm(ps, value));
 
  dt_control_queue_redraw_center();
}
 
static void
_unit_changed(GtkWidget *combo, dt_lib_module_t *self)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  const float grid_size = dt_conf_get_float("plugins/print/print/grid_size");
 
  const int unit = dt_bauhaus_combobox_get(combo);
  if(unit < 0) return; // shouldn't happen, but it could be -1 if nothing is selected
  ps->unit = unit;
  dt_conf_set_string("plugins/print/print/unit", _unit_names[unit]);
 
  const double margin_top = ps->prt.page.margin_top;
  const double margin_left = ps->prt.page.margin_left;
  const double margin_right = ps->prt.page.margin_right;
  const double margin_bottom = ps->prt.page.margin_bottom;
 
  int n_digits;
  float incr;
  _precision_by_unit(ps->unit, &n_digits, &incr, NULL);
 
  ++darktable.gui->reset;
 
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_top), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_bottom), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_left), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_right), n_digits);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_top), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_bottom), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_left), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_right), incr, 10.f*incr);
 
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_x), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_y), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_width), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->b_height), n_digits);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_x), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_y), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_width), incr, 10.f*incr);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->b_height), incr, 10.f*incr);
 
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(ps->grid_size), n_digits);
  gtk_spin_button_set_increments(GTK_SPIN_BUTTON(ps->grid_size), incr, 10.f*incr);
 
  _update_slider(ps);
 
  // convert margins to new unit
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_top),    margin_top * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_bottom), margin_bottom * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_left),   margin_left * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_right),  margin_right * units[ps->unit]);
 
  // grid size
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->grid_size), grid_size * units[ps->unit]);
 
  --darktable.gui->reset;
 
  _fill_box_values(ps);
}
 
static void
_style_callback(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(dt_bauhaus_combobox_get(ps->style) == 0)
  {
    dt_conf_set_string("plugins/print/print/style", "");
  }
  else
  {
    const gchar *style = dt_bauhaus_combobox_get_text(ps->style);
    dt_conf_set_string("plugins/print/print/style", style);
  }
 
  dt_free(ps->v_style);
  ps->v_style = dt_conf_get_string("plugins/print/print/style");
}
 
static void
_profile_changed(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const int pos = dt_bauhaus_combobox_get(widget);
  for(const GList *prof = ps->profiles; prof; prof = g_list_next(prof))
  {
    dt_lib_export_profile_t *pp = (dt_lib_export_profile_t *)prof->data;
    if(pp->pos == pos)
    {
      dt_conf_set_int("plugins/print/print/icctype", pp->type);
      dt_conf_set_string("plugins/print/print/iccprofile", pp->filename);
      dt_free(ps->v_iccprofile);
      ps->v_icctype = pp->type;
      ps->v_iccprofile = g_strdup(pp->filename);
      return;
    }
  }
  dt_conf_set_int("plugins/print/print/icctype", DT_COLORSPACE_NONE);
  dt_conf_set_string("plugins/print/print/iccprofile", "");
  dt_free(ps->v_iccprofile);
  ps->v_icctype = DT_COLORSPACE_NONE;
  ps->v_iccprofile = g_strdup("");
}
 
static void
_printer_profile_changed(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const int pos = dt_bauhaus_combobox_get(widget);
  for(const GList *prof = ps->profiles; prof; prof = g_list_next(prof))
  {
    dt_lib_export_profile_t *pp = (dt_lib_export_profile_t *)prof->data;
    if(pp->ppos == pos)
    {
      dt_conf_set_int("plugins/print/printer/icctype", pp->type);
      dt_conf_set_string("plugins/print/printer/iccprofile", pp->filename);
      dt_free(ps->v_piccprofile);
      ps->v_picctype = pp->type;
      ps->v_piccprofile = g_strdup(pp->filename);
 
      // activate the black compensation and printer intent
      gtk_widget_set_sensitive(GTK_WIDGET(ps->black_point_compensation), TRUE);
      return;
    }
  }
  dt_conf_set_int("plugins/print/printer/icctype", DT_COLORSPACE_NONE);
  dt_conf_set_string("plugins/print/printer/iccprofile", "");
  dt_free(ps->v_piccprofile);
  ps->v_picctype = DT_COLORSPACE_NONE;
  ps->v_piccprofile = g_strdup("");
  gtk_widget_set_sensitive(GTK_WIDGET(ps->black_point_compensation), FALSE);
}
 
static void
_printer_intent_callback (GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const int pos = dt_bauhaus_combobox_get(widget);
  dt_conf_set_int("plugins/print/printer/iccintent", pos);
  ps->v_pintent = pos;
  ps->prt.printer.intent = pos;
}
 
static void
_printer_bpc_callback(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  ps->v_black_point_compensation = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(ps->black_point_compensation));
  dt_conf_set_bool("plugins/print/print/black_point_compensation", ps->v_black_point_compensation);
}
 
static void
_intent_callback(GtkWidget *widget, dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
  const int pos = dt_bauhaus_combobox_get(widget);
  // record the intent that will override the out rendering module on export
  dt_conf_set_int("plugins/print/print/iccintent", pos - 1);
  ps->v_intent = pos - 1;
}
 
static void _set_orientation(dt_lib_print_settings_t *ps, int32_t imgid)
{
  dt_mipmap_buffer_t buf;
  dt_mipmap_cache_get(darktable.mipmap_cache, &buf,
                      imgid, DT_MIPMAP_0, DT_MIPMAP_BLOCKING, 'r');
 
  // If there's a mipmap available, figure out orientation based upon
  // its dimensions. Otherwise, don't touch orientation until the
  // mipmap arrives.
  if(buf.size != DT_MIPMAP_NONE)
  {
    ps->prt.page.landscape = (buf.width > buf.height);
    dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
    dt_bauhaus_combobox_set(ps->orientation, ps->prt.page.landscape == TRUE ? 1 : 0);
  }
 
  dt_mipmap_cache_release(darktable.mipmap_cache, &buf);
  dt_control_queue_redraw_center();
}
 
static void _print_settings_activate_or_update_callback(gpointer instance, int32_t imgid, gpointer user_data)
{
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  // load an image with a simple click on the filmstrip only if a single image is present
  if(ps->imgs.count == 1)
  {
    if(ps->has_changed)
    {
      dt_printing_setup_image(&ps->imgs, 0, imgid, 100, 100, ps->imgs.box[0].alignment);
    }
    else
    {
      _set_orientation(ps, imgid);
      dt_printing_clear_boxes(&ps->imgs);
      ps->imgs.imgid_to_load = imgid;
      dt_control_queue_redraw_center();
    }
  }
}
 
static GList* _get_profiles()
{
  //  Create list of profiles
  GList *list = NULL;
 
  dt_lib_export_profile_t *prof = (dt_lib_export_profile_t *)g_malloc0(sizeof(dt_lib_export_profile_t));
  prof->type = DT_COLORSPACE_SRGB;
  dt_utf8_strlcpy(prof->name, _("sRGB (web-safe)"), sizeof(prof->name));
  prof->pos = -2;
  prof->ppos = -2;
  list = g_list_prepend(list, prof);
 
  prof = (dt_lib_export_profile_t *)g_malloc0(sizeof(dt_lib_export_profile_t));
  prof->type = DT_COLORSPACE_ADOBERGB;
  dt_utf8_strlcpy(prof->name, _("Adobe RGB (compatible)"), sizeof(prof->name));
  prof->pos = -2;
  prof->ppos = -2;
  list = g_list_prepend(list, prof);
 
  // add the profiles from datadir/color/out/*.icc
  for(GList *iter = darktable.color_profiles->profiles; iter; iter = g_list_next(iter))
  {
    dt_colorspaces_color_profile_t *p = (dt_colorspaces_color_profile_t *)iter->data;
    if(p->type == DT_COLORSPACE_FILE)
    {
      prof = (dt_lib_export_profile_t *)g_malloc0(sizeof(dt_lib_export_profile_t));
      g_strlcpy(prof->name, p->name, sizeof(prof->name));
      g_strlcpy(prof->filename, p->filename, sizeof(prof->filename));
      prof->type = DT_COLORSPACE_FILE;
      prof->pos = -2;
      prof->ppos = -2;
      list = g_list_prepend(list, prof);
    }
  }
 
  return g_list_reverse(list);  // list was built in reverse order, so un-reverse it
}
 
static void _new_printer_callback(dt_printer_info_t *printer, void *user_data)
{
  static int count = 0;
  const dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  const dt_lib_print_settings_t *d = (dt_lib_print_settings_t*)self->data;
 
  char *default_printer = dt_conf_get_string("plugins/print/print/printer");
 
  g_signal_handlers_block_by_func(G_OBJECT(d->printers), G_CALLBACK(_printer_changed), NULL);
 
  dt_bauhaus_combobox_add(d->printers, printer->name);
 
  if(!g_strcmp0(default_printer, printer->name) || default_printer[0]=='\0')
  {
    dt_bauhaus_combobox_set(d->printers, count);
    _set_printer(self, printer->name);
  }
  count++;
  dt_free(default_printer);
 
  g_signal_handlers_unblock_by_func(G_OBJECT(d->printers), G_CALLBACK(_printer_changed), NULL);
}
 
void view_enter(struct dt_lib_module_t *self,struct dt_view_t *old_view,struct dt_view_t *new_view)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  // Re-publish the settings payload on each entry so the print view never
  // keeps a stale or not-yet-initialized images box between switches.
  dt_view_print_settings(darktable.view_manager, &ps->prt, &ps->imgs);
 
  // user activated a new image via the filmstrip or user entered view
  // mode which activates an image: get image_id and orientation
  DT_DEBUG_CONTROL_SIGNAL_CONNECT(darktable.signals, DT_SIGNAL_VIEWMANAGER_FILMSTRIP_ACTIVATE,
                            G_CALLBACK(_print_settings_activate_or_update_callback), self);
 
  // NOTE: it would be proper to set image_id here to -1, but this seems to make no difference
}
 
void view_leave(struct dt_lib_module_t *self,struct dt_view_t *old_view,struct dt_view_t *new_view)
{
  DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(darktable.signals,
                               G_CALLBACK(_print_settings_activate_or_update_callback),
                               self);
}
 
void _get_control(dt_lib_print_settings_t *ps, float x, float y)
{
  const float dist = 20.0;
 
  const dt_image_box *b = &ps->imgs.box[ps->selected];
 
  ps->sel_controls = 0;
 
  if(fabsf(b->screen.x - x) < dist)
    ps->sel_controls |= BOX_LEFT;
 
  if(fabsf(b->screen.y - y) < dist)
    ps->sel_controls |= BOX_TOP;
 
  if(fabsf((b->screen.x + b->screen.width) - x) < dist)
    ps->sel_controls |= BOX_RIGHT;
 
  if(fabsf((b->screen.y + b->screen.height) - y) < dist)
    ps->sel_controls |= BOX_BOTTOM;
 
  if(ps->sel_controls == 0) ps->sel_controls = BOX_ALL;
}
 
int mouse_leave(struct dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(ps->last_selected != -1)
  {
    dt_control_set_mouse_over_id(ps->imgs.box[ps->last_selected].imgid);
  }
 
  return 0;
}
 
static void _snap_to_grid(dt_lib_print_settings_t *ps, float *x, float *y)
{
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(ps->snap_grid)))
  {
    // V lines
    const float step = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ps->grid_size)) * units[ps->unit];
 
    // only display the grid if a step of 5 pixels
    const float diff = DT_PIXEL_APPLY_DPI(5);
 
    float grid_pos = (float)ps->imgs.screen.page.x;
 
    const float h_step = _mm_to_hscreen(ps, step, FALSE);
 
    while(grid_pos < ps->imgs.screen.page.x + ps->imgs.screen.page.width)
    {
      if(fabsf(*x - grid_pos) < diff) *x = grid_pos;
      grid_pos += h_step;
    }
 
    // H lines
    grid_pos = (float)ps->imgs.screen.page.y;
 
    const float v_step = _mm_to_vscreen(ps, step, FALSE);
 
    while(grid_pos < ps->imgs.screen.page.y + ps->imgs.screen.page.height)
    {
      if(fabsf(*y - grid_pos) < diff) *y = grid_pos;
      grid_pos += v_step;
    }
  }
  // FIXME: should clamp values to page size here?
}
 
int mouse_moved(struct dt_lib_module_t *self, double x, double y, double pressure, int which)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  gboolean expose = FALSE;
 
  if(ps->creation)
    dt_control_change_cursor(GDK_PLUS);
 
  if(ps->creation && ps->dragging)
  {
    ps->x2 = x;
    ps->y2 = y;
    _snap_to_grid(ps, &ps->x2, &ps->y2);
    expose = TRUE;
  }
  else if(ps->dragging)
  {
    dt_image_box *b = &ps->imgs.box[ps->selected];
    const float dx = x - ps->click_pos_x;
    const float dy = y - ps->click_pos_y;
    const float coef = dx / b->screen.width;
 
    switch(ps->sel_controls)
    {
       case BOX_ALL:
         ps->x1 = b->screen.x + dx;
         ps->y1 = b->screen.y + dy;
         ps->x2 = b->screen.x + b->screen.width + dx;
         ps->y2 = b->screen.y + b->screen.height + dy;
         break;
       case BOX_LEFT:
         ps->x1 = b->screen.x + dx;
         break;
       case BOX_TOP:
         ps->y1 = b->screen.y + dy;
         break;
       case BOX_RIGHT:
         ps->x2 = b->screen.x + b->screen.width + dx;
         break;
       case BOX_BOTTOM:
         ps->y2 = b->screen.y + b->screen.height + dy;
         break;
       case BOX_TOP_LEFT:
         ps->x1 = b->screen.x + dx;
         ps->y1 = b->screen.y + (coef * b->screen.height);
         break;
       case BOX_TOP_RIGHT:
         ps->x2 = b->screen.x + b->screen.width + dx;
         ps->y1 = b->screen.y - (coef * b->screen.height);
         break;
       case BOX_BOTTOM_LEFT:
         ps->x1 = b->screen.x + dx;
         ps->y2 = b->screen.y + b->screen.height - (coef * b->screen.height);
         break;
       case BOX_BOTTOM_RIGHT:
         ps->x2 = b->screen.x + b->screen.width + dx;
         ps->y2 = b->screen.y + b->screen.height + (coef * b->screen.height);
         break;
       default:
         break;
    }
    expose = TRUE;
 
    _snap_to_grid(ps, &ps->x1, &ps->y1);
    _snap_to_grid(ps, &ps->x2, &ps->y2);
  }
  else if(!ps->creation)
  {
    const int bidx = dt_printing_get_image_box(&ps->imgs, x, y);
    ps->sel_controls = 0;
 
    if(bidx == -1)
    {
      if(ps->selected != -1) expose = TRUE;
      ps->selected = -1;
    }
    else
    {
      expose = TRUE;
      ps->selected = bidx;
      _fill_box_values(ps);
      _get_control(ps, x, y);
    }
  }
 
  if(expose) dt_control_queue_redraw_center();
 
  return 0;
}
 
static void _swap(float *a, float *b)
{
  const float tmp = *a;
  *a = *b;
  *b = tmp;
}
 
int button_released(struct dt_lib_module_t *self, double x, double y, int which, uint32_t state)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(ps->dragging)
  {
    int idx = -1;
 
    gtk_widget_set_sensitive(ps->del, TRUE);
 
    // handle new area
    if(ps->creation)
    {
      idx = ps->imgs.count++;
    }
    else if(ps->selected != -1)
    {
      idx = ps->selected;
    }
 
    if(idx != -1)
    {
      // make sure the area is in the the printable area taking into account the margins
 
      // don't allow a too small area
      if(ps->x2 < ps->x1) _swap(&ps->x1, &ps->x2);
      if(ps->y2 < ps->y1) _swap(&ps->y1, &ps->y2);
 
      const float dx = ps->x2 - ps->x1;
      const float dy = ps->y2 - ps->y1;
 
      dt_printing_setup_box(&ps->imgs, idx, ps->x1, ps->y1, dx, dy);
      // make the new created box the last edited one
      ps->last_selected = idx;
      _fill_box_values(ps);
    }
  }
 
  _update_slider(ps);
 
  ps->creation = FALSE;
  ps->dragging = FALSE;
 
  dt_control_change_cursor(GDK_LEFT_PTR);
 
  return 0;
}
 
int button_pressed(struct dt_lib_module_t *self, double x, double y, double pressure,
                   int which, int type, uint32_t state)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  ps->click_pos_x = x;
  ps->click_pos_y = y;
  ps->last_selected = -1;
 
  if(ps->creation)
  {
    ps->dragging = TRUE;
    ps->selected = -1;
    ps->x1 = ps->x2 = x;
    ps->y1 = ps->y2 = y;
 
    _snap_to_grid(ps, &ps->x1, &ps->y1);
  }
  else if(ps->selected > 0
          && (which == 2 || (which == 1 && dt_modifier_is(state, GDK_CONTROL_MASK))))
  {
    // middle click (or ctrl-click), move selected image down
    dt_image_box b;
    memcpy(&b, &ps->imgs.box[ps->selected], sizeof(dt_image_box));
    memcpy(&ps->imgs.box[ps->selected], &ps->imgs.box[ps->selected-1], sizeof(dt_image_box));
    memcpy(&ps->imgs.box[ps->selected-1], &b, sizeof(dt_image_box));
  }
  else if(ps->selected != -1 && which == 1)
  {
    dt_image_box *b = &ps->imgs.box[ps->selected];
 
    ps->dragging = TRUE;
    ps->x1 = b->screen.x;
    ps->y1 = b->screen.y;
    ps->x2 = b->screen.x + b->screen.width;
    ps->y2 = b->screen.y + b->screen.height;
 
    ps->last_selected = ps->selected;
    ps->has_changed = TRUE;
 
    _get_control(ps, x, y);
 
    dt_control_change_cursor(GDK_HAND1);
  }
  else if(ps->selected != -1 && which == 3)
  {
    dt_image_box *b = &ps->imgs.box[ps->selected];
 
    // if image present remove it, otherwise remove the box
    if(b->imgid != UNKNOWN_IMAGE)
      b->imgid = UNKNOWN_IMAGE;
    else
      _page_delete_area(self, ps->selected);
 
    ps->last_selected = ps->selected;
    ps->has_changed = TRUE;
  }
 
  return 0;
}
 
void _cairo_rectangle(cairo_t *cr, const int sel_controls,
                               const int x1, const int y1, const int x2, const int y2)
{
  const float sel_width = DT_PIXEL_APPLY_DPI(3.0);
  const float std_width = DT_PIXEL_APPLY_DPI(1.0);
 
  const gboolean all = sel_controls == BOX_ALL;
 
  cairo_move_to(cr, x1, y1);
  cairo_set_line_width(cr, (all || sel_controls == BOX_LEFT) ? sel_width : std_width);
  cairo_line_to(cr, x1, y2);
  cairo_stroke(cr);
 
  cairo_move_to(cr, x1, y2);
  cairo_set_line_width(cr, (all || sel_controls == BOX_BOTTOM) ? sel_width : std_width);
  cairo_line_to(cr, x2, y2);
  cairo_stroke(cr);
 
  cairo_move_to(cr, x2, y2);
  cairo_set_line_width(cr, (all || sel_controls == BOX_RIGHT) ? sel_width : std_width);
  cairo_line_to(cr, x2, y1);
  cairo_stroke(cr);
 
  cairo_move_to(cr, x2, y1);
  cairo_set_line_width(cr, (all || sel_controls == BOX_TOP) ? sel_width : std_width);
  cairo_line_to(cr, x1, y1);
  cairo_stroke(cr);
 
  if(sel_controls == 0)
  {
    const double dash[] = { DT_PIXEL_APPLY_DPI(3.0), DT_PIXEL_APPLY_DPI(3.0) };
    cairo_set_dash(cr, dash, 2, 0);
 
    // no image inside
    cairo_move_to(cr, x1, y1);
    cairo_line_to(cr, x2, y2);
 
    cairo_move_to(cr, x1, y2);
    cairo_line_to(cr, x2, y1);
    cairo_stroke(cr);
  }
 
  cairo_set_dash(cr, NULL, 0, 0);
  cairo_set_line_width(cr, sel_width);
 
  if(sel_controls == BOX_TOP_LEFT)
  {
    cairo_rectangle (cr, x1, y1, DT_PIXEL_APPLY_DPI(15), DT_PIXEL_APPLY_DPI(15));
    cairo_stroke(cr);
  }
 
  if(sel_controls == BOX_TOP_RIGHT)
  {
    cairo_rectangle (cr, x2 - DT_PIXEL_APPLY_DPI(15), y1,
                     DT_PIXEL_APPLY_DPI(15), DT_PIXEL_APPLY_DPI(15));
    cairo_stroke(cr);
  }
 
  if(sel_controls == BOX_BOTTOM_LEFT)
  {
    cairo_rectangle (cr, x1, y2 - DT_PIXEL_APPLY_DPI(15),
                     DT_PIXEL_APPLY_DPI(15), DT_PIXEL_APPLY_DPI(15));
    cairo_stroke(cr);
  }
 
  if(sel_controls == BOX_BOTTOM_RIGHT)
  {
    cairo_rectangle (cr, x2 - DT_PIXEL_APPLY_DPI(15), y2 - DT_PIXEL_APPLY_DPI(15),
                     DT_PIXEL_APPLY_DPI(15), DT_PIXEL_APPLY_DPI(15));
    cairo_stroke(cr);
  }
}
 
void gui_post_expose(struct dt_lib_module_t *self, cairo_t *cr, int32_t width, int32_t height,
                     int32_t pointerx, int32_t pointery)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  // display grid
 
  // 1mm
 
  const float step = gtk_spin_button_get_value(GTK_SPIN_BUTTON(ps->grid_size)) / units[ps->unit];
 
  // only display grid if spacing more than 5 pixels
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(ps->grid))
     && (int)_mm_to_hscreen(ps, step, FALSE) > DT_PIXEL_APPLY_DPI(5))
  {
    const double dash[] = { DT_PIXEL_APPLY_DPI(5.0), DT_PIXEL_APPLY_DPI(5.0) };
    cairo_set_source_rgba(cr, 1, .2, .2, 0.6);
 
    // V lines
    float grid_pos = (float)ps->imgs.screen.page.x;
 
    const float h_step = _mm_to_hscreen(ps, step, FALSE);
    int n = 0;
 
    while(grid_pos < ps->imgs.screen.page.x + ps->imgs.screen.page.width)
    {
      cairo_set_dash(cr, dash, ((n % 5) == 0) ? 0 : 2, DT_PIXEL_APPLY_DPI(5));
      cairo_set_line_width(cr, ((n % 5) == 0) ? DT_PIXEL_APPLY_DPI(1.0) : DT_PIXEL_APPLY_DPI(0.5));
      cairo_move_to(cr, grid_pos, ps->imgs.screen.page.y);
      cairo_line_to(cr, grid_pos, ps->imgs.screen.page.y + ps->imgs.screen.page.height);
      cairo_stroke(cr);
      grid_pos += h_step;
      n++;
    }
 
    // H lines
    grid_pos = (float)ps->imgs.screen.page.y;
 
    const float v_step = _mm_to_vscreen(ps, step, FALSE);
    n = 0;
 
    while(grid_pos < ps->imgs.screen.page.y + ps->imgs.screen.page.height)
    {
      cairo_set_dash(cr, dash, ((n % 5) == 0) ? 0 : 2, DT_PIXEL_APPLY_DPI(5));
      cairo_set_line_width(cr, ((n % 5) == 0) ? DT_PIXEL_APPLY_DPI(1.0) : DT_PIXEL_APPLY_DPI(0.5));
      cairo_move_to(cr, ps->imgs.screen.page.x, grid_pos);
      cairo_line_to(cr, ps->imgs.screen.page.x + ps->imgs.screen.page.width, grid_pos);
      cairo_stroke(cr);
      grid_pos += v_step;
      n++;
    }
  }
 
  // disable dash
  cairo_set_source_rgba(cr, 1, .2, .2, 0.6);
  cairo_set_dash(cr, NULL, 0, 0);
 
  for(int k=0; k<ps->imgs.count; k++)
  {
    dt_image_box *img = &ps->imgs.box[k];
 
    if(k == ps->selected || img->imgid == UNKNOWN_IMAGE)
    {
      cairo_set_source_rgba(cr, .4, .4, .4, 1.0);
      _cairo_rectangle(cr, (k == ps->selected) ? ps->sel_controls : 0,
                       img->screen.x, img->screen.y,
                       img->screen.x + img->screen.width, img->screen.y + img->screen.height);
      cairo_stroke(cr);
    }
 
    if(k == ps->imgs.motion_over)
    {
      cairo_set_source_rgba(cr, .2, .2, .2, 1.0);
      cairo_rectangle(cr, img->screen.x, img->screen.y, img->screen.width, img->screen.height);
      cairo_fill(cr);
    }
  }
 
  // now display new area if any
  if(ps->dragging || ps->selected != -1)
  {
    float dx1, dy1, dx2, dy2, dwidth, dheight; // displayed values
    float x1, y1, x2, y2;                      // box screen coordinates
 
    float pwidth, pheight;
    _get_page_dimension(&ps->prt, &pwidth, &pheight);
 
    if(ps->dragging)
    {
      x1      = ps->x1;
      y1      = ps->y1;
      x2      = ps->x2;
      y2      = ps->y2;
 
      dx1     = _hscreen_to_mm(ps, ps->x1, TRUE) * units[ps->unit];
      dy1     = _vscreen_to_mm(ps, ps->y1, TRUE) * units[ps->unit];
      dx2     = _hscreen_to_mm(ps, ps->x2, TRUE) * units[ps->unit];
      dy2     = _vscreen_to_mm(ps, ps->y2, TRUE) * units[ps->unit];
      dwidth  = fabsf(dx2 - dx1);
      dheight = fabsf(dy2 - dy1);
    }
    else
    {
      const dt_image_box *box = &ps->imgs.box[ps->selected];
 
      // we could use a simpler solution but we want to use the same formulae used
      // to fill the editable box values to avoid discrepancies between values due
      // to rounding errors.
 
      dx1     = _percent_unit_of(ps, pwidth, box->pos.x);
      dy1     = _percent_unit_of(ps, pheight, box->pos.y);
      dwidth  = _percent_unit_of(ps, pwidth, box->pos.width);
      dheight = _percent_unit_of(ps, pheight, box->pos.height);
      dx2     = dx1 + dwidth;
      dy2     = dy1 + dheight;
 
      x1 = box->screen.x;
      y1 = box->screen.y;
      x2 = box->screen.x + box->screen.width;
      y2 = box->screen.y + box->screen.height;
    }
 
    cairo_set_source_rgba(cr, .4, .4, .4, 1.0);
    _cairo_rectangle(cr, ps->sel_controls, x1, y1, x2, y2);
 
    // display corner coordinates
    // FIXME: here and elsewhere eliminate hardcoded RGB values -- use CSS
    char dimensions[16];
    PangoLayout *layout;
    PangoRectangle ext;
    PangoFontDescription *desc = pango_font_description_copy_static(darktable.bauhaus->pango_font_desc);
    pango_font_description_set_weight(desc, PANGO_WEIGHT_BOLD);
    pango_font_description_set_absolute_size(desc, DT_PIXEL_APPLY_DPI(16) * PANGO_SCALE);
    layout = pango_cairo_create_layout(cr);
    pango_layout_set_font_description(layout, desc);
    const double text_h = DT_PIXEL_APPLY_DPI(16+2);
    const double margin = DT_PIXEL_APPLY_DPI(6);
    const double dash = DT_PIXEL_APPLY_DPI(4.0);
    int n_digits;
    char *precision;
    _precision_by_unit(ps->unit, &n_digits, NULL, &precision);
    double xp, yp;
 
    yp = y1 + (y2 - y1 - text_h) * 0.5;
 
    if(x1 >= ps->imgs.screen.page.x && x1 <= (ps->imgs.screen.page.x + ps->imgs.screen.page.width))
    {
      snprintf(dimensions, sizeof(dimensions), precision, dx1);
      pango_layout_set_text(layout, dimensions, -1);
      pango_layout_get_pixel_extents(layout, NULL, &ext);
      xp = ps->imgs.screen.page.x + (x1 - text_h - ps->imgs.screen.page.x - ext.width) * 0.5;
      if(xp < ps->imgs.screen.page.x + 3 * margin)
      {
        xp = x1 + 2 * margin;
        // somewhat hacky, assumes that all numeric labels are about
        // the same width
        yp = MIN(y2 - text_h, yp + ext.width + 0.5 * text_h + margin * 3);
      }
      cairo_set_source_rgba(cr, .7, .7, .7, .9);
      cairo_move_to(cr, ps->imgs.screen.page.x, yp + text_h * 0.5);
      cairo_line_to(cr, x1, yp + text_h * 0.5);
      cairo_stroke_preserve(cr);
      cairo_set_source_rgba(cr, .5, .5, .5, .9);
      cairo_set_dash(cr, &dash, 1, dash);
      cairo_stroke(cr);
      cairo_set_dash(cr, NULL, 0, 0);
      dt_gui_draw_rounded_rectangle(cr, ext.width + 2 * margin, text_h + 2 * margin, xp - margin, yp - margin);
      cairo_set_source_rgb(cr, .8, .8, .8);
      cairo_move_to(cr, xp, yp);
      pango_cairo_show_layout(cr, layout);
    }
 
    if(x2 >= ps->imgs.screen.page.x && x2 <= (ps->imgs.screen.page.x + ps->imgs.screen.page.width))
    {
      snprintf(dimensions, sizeof(dimensions), precision, pwidth * units[ps->unit] - dx2);
      pango_layout_set_text(layout, dimensions, -1);
      pango_layout_get_pixel_extents(layout, NULL, &ext);
      xp = x2 + (ps->imgs.screen.page.x + ps->imgs.screen.page.width - x2 - ext.width) * 0.5;
      if(xp + ext.width + margin > ps->imgs.screen.page.x + ps->imgs.screen.page.width)
        xp = x2 - ext.width - 2 * margin;
      cairo_set_source_rgba(cr, .7, .7, .7, .9);
      cairo_move_to(cr, x2, yp + text_h * 0.5);
      cairo_line_to(cr, ps->imgs.screen.page.x + ps->imgs.screen.page.width, yp + text_h * 0.5);
      cairo_stroke_preserve(cr);
      cairo_set_source_rgba(cr, .5, .5, .5, .9);
      cairo_set_dash(cr, &dash, 1, dash);
      cairo_stroke(cr);
      cairo_set_dash(cr, NULL, 0, 0);
      dt_gui_draw_rounded_rectangle(cr, ext.width + 2 * margin, text_h + 2 * margin,
                                    xp - margin, yp - margin);
      cairo_set_source_rgb(cr, .8, .8, .8);
      cairo_move_to(cr, xp, yp);
      pango_cairo_show_layout(cr, layout);
    }
 
    xp = x1 + (x2 - x1 - text_h) * 0.5;
 
    if(y1 >= ps->imgs.screen.page.y && y1 <= (ps->imgs.screen.page.y + ps->imgs.screen.page.height))
    {
      snprintf(dimensions, sizeof(dimensions), precision, dy1);
      pango_layout_set_text(layout, dimensions, -1);
      pango_layout_get_pixel_extents(layout, NULL, &ext);
      yp = ps->imgs.screen.page.y + (y1 - text_h - ps->imgs.screen.page.y - ext.width) * 0.5;
      if(yp < ps->imgs.screen.page.y + 3 * margin)
      {
        xp = MIN(x2 - text_h, xp + ext.width + 0.5 * text_h + margin * 3);
        yp = y1 + 2 * margin;
      }
      cairo_set_source_rgba(cr, .7, .7, .7, .9);
      cairo_move_to(cr, xp + text_h * 0.5, ps->imgs.screen.page.y);
      cairo_line_to(cr, xp + text_h * 0.5, y1);
      cairo_stroke_preserve(cr);
      cairo_set_source_rgba(cr, .5, .5, .5, .9);
      cairo_set_dash(cr, &dash, 1, dash);
      cairo_stroke(cr);
      cairo_set_dash(cr, NULL, 0, 0);
      dt_gui_draw_rounded_rectangle(cr, text_h + 2 * margin, ext.width + 2 * margin,
                                    xp - margin, yp - margin);
      cairo_set_source_rgb(cr, .8, .8, .8);
      cairo_move_to(cr, xp + text_h * 0.5, yp + ext.width * 0.5);
      cairo_save(cr);
      cairo_rotate(cr, -M_PI_2);
      cairo_rel_move_to(cr, -0.5 * ext.width, -0.5 * text_h);
      pango_cairo_update_layout(cr, layout);
      pango_cairo_show_layout(cr, layout);
      cairo_restore(cr);
    }
 
    if(y2 >= ps->imgs.screen.page.y && y2 <= (ps->imgs.screen.page.y + ps->imgs.screen.page.height))
    {
      snprintf(dimensions, sizeof(dimensions), precision, pheight * units[ps->unit] - dy2);
      pango_layout_set_text(layout, dimensions, -1);
      pango_layout_get_pixel_extents(layout, NULL, &ext);
      yp = y2 + (ps->imgs.screen.page.y + ps->imgs.screen.page.height - y2 - ext.width) * 0.5;
      if(yp + ext.width + margin > ps->imgs.screen.page.y + ps->imgs.screen.page.height)
        yp = y2 - ext.width - 2 * margin;
      cairo_set_source_rgba(cr, .7, .7, .7, .9);
      cairo_move_to(cr, xp + text_h * 0.5, y2);
      cairo_line_to(cr, xp + text_h * 0.5, ps->imgs.screen.page.y + ps->imgs.screen.page.height);
      cairo_stroke_preserve(cr);
      cairo_set_source_rgba(cr, .5, .5, .5, .9);
      cairo_set_dash(cr, &dash, 1, dash);
      cairo_stroke(cr);
      cairo_set_dash(cr, NULL, 0, 0);
      dt_gui_draw_rounded_rectangle(cr, text_h + 2 * margin, ext.width + 2 * margin,
                                    xp - margin, yp - margin);
      cairo_set_source_rgb(cr, .8, .8, .8);
      cairo_move_to(cr, xp + text_h * 0.5, yp + ext.width * 0.5);
      cairo_save(cr);
      cairo_rotate(cr, -M_PI_2);
      cairo_rel_move_to(cr, -0.5 * ext.width, -0.5 * text_h);
      pango_cairo_update_layout(cr, layout);
      pango_cairo_show_layout(cr, layout);
      cairo_restore(cr);
    }
 
    // display width and height
    snprintf(dimensions, sizeof(dimensions), precision, dwidth);
    pango_layout_set_text(layout, dimensions, -1);
    pango_layout_get_pixel_extents(layout, NULL, &ext);
    xp = (x1 + x2 - ext.width) * .5;
    if(y1 > text_h * 0.5 + margin)
      yp = y1 - text_h * 0.5;
    else
      yp = y1 + text_h - 2 * margin;
    cairo_set_source_rgba(cr, .5, .5, .5, .9);
    dt_gui_draw_rounded_rectangle(cr, ext.width + 2 * margin, text_h + 2 * margin,
                                  xp - margin, yp - margin);
    cairo_set_source_rgb(cr, .8, .8, .8);
    cairo_move_to(cr, xp, yp);
    pango_cairo_show_layout(cr, layout);
 
    snprintf(dimensions, sizeof(dimensions), precision, dheight);
    pango_layout_set_text(layout, dimensions, -1);
    pango_layout_get_pixel_extents(layout, NULL, &ext);
    if(x1 > text_h * 0.5 + margin)
      xp = x1 - text_h * 0.5;
    else
      xp = x1 + text_h - 2 * margin;
    yp = (y1 + y2) * .5;
    cairo_set_source_rgba(cr, .5, .5, .5, .9);
    dt_gui_draw_rounded_rectangle(cr, text_h + 2 * margin, ext.width + 2 * margin,
                                  xp - margin, yp - margin - 0.5 * ext.width);
    cairo_set_source_rgb(cr, .8, .8, .8);
    cairo_move_to(cr, xp + text_h * 0.5, yp);
    cairo_save(cr);
    cairo_rotate(cr, -M_PI_2);
    cairo_rel_move_to(cr, -0.5 * ext.width, -0.5 * text_h);
    pango_cairo_update_layout(cr, layout);
    pango_cairo_show_layout(cr, layout);
    cairo_restore(cr);
 
    pango_font_description_free(desc);
    g_object_unref(layout);
    dt_free(precision);
  }
 
  if(ps->imgs.screen.borderless)
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->borderless), TRUE);
  else
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->borderless), FALSE);
}
 
static void _width_changed(GtkWidget *widget, gpointer user_data)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)user_data;
 
  const float nv = gtk_spin_button_get_value(GTK_SPIN_BUTTON(widget));
  const float nv_mm = nv / units[ps->unit];
 
  dt_image_box *box = &ps->imgs.box[ps->last_selected];
 
  dt_printing_setup_box(&ps->imgs, ps->last_selected,
                        box->screen.x, box->screen.y,
                        _mm_to_hscreen(ps, nv_mm, FALSE), box->screen.height);
 
  ps->has_changed = TRUE;
  dt_control_queue_redraw_center();
}
 
static void _height_changed(GtkWidget *widget, gpointer user_data)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)user_data;
 
  const float nv = gtk_spin_button_get_value(GTK_SPIN_BUTTON(widget));
  const float nv_mm = nv / units[ps->unit];
 
  dt_image_box *box = &ps->imgs.box[ps->last_selected];
 
  dt_printing_setup_box(&ps->imgs, ps->last_selected,
                        box->screen.x, box->screen.y,
                        box->screen.width, _mm_to_vscreen(ps, nv_mm, FALSE));
 
  ps->has_changed = TRUE;
  dt_control_queue_redraw_center();
}
 
static void _x_changed(GtkWidget *widget, gpointer user_data)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)user_data;
 
  const float nv = gtk_spin_button_get_value(GTK_SPIN_BUTTON(widget));
  const float nv_mm = nv / units[ps->unit];
 
  dt_image_box *box = &ps->imgs.box[ps->last_selected];
 
  dt_printing_setup_box(&ps->imgs, ps->last_selected,
                        _mm_to_hscreen(ps, nv_mm, TRUE), box->screen.y,
                        box->screen.width, box->screen.height);
 
  ps->has_changed = TRUE;
  dt_control_queue_redraw_center();
}
 
static void _y_changed(GtkWidget *widget, gpointer user_data)
{
  if(darktable.gui->reset) return;
 
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)user_data;
 
  const float nv = gtk_spin_button_get_value(GTK_SPIN_BUTTON(widget));
  const float nv_mm = nv / units[ps->unit];
 
  dt_image_box *box = &ps->imgs.box[ps->last_selected];
 
  dt_printing_setup_box(&ps->imgs, ps->last_selected,
                        box->screen.x, _mm_to_vscreen(ps, nv_mm, TRUE),
                        box->screen.width, box->screen.height);
 
  ps->has_changed = TRUE;
  dt_control_queue_redraw_center();
}
 
void gui_init(dt_lib_module_t *self)
{
  dt_lib_print_settings_t *d = (dt_lib_print_settings_t*)malloc(sizeof(dt_lib_print_settings_t));
  self->data = d;
  self->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
  dt_gui_add_help_link(self->widget, dt_get_help_url("print_overview"));
 
  char datadir[PATH_MAX] = { 0 };
  char confdir[PATH_MAX] = { 0 };
  dt_loc_get_user_config_dir(confdir, sizeof(confdir));
  dt_loc_get_datadir(datadir, sizeof(datadir));
  char *system_profile_dir = g_build_filename(datadir, "color", "out", NULL);
  char *user_profile_dir = g_build_filename(confdir, "color", "out", NULL);
 
  GtkWidget *label;
 
  d->paper_list = NULL;
  d->media_list = NULL;
  d->unit = 0;
  d->width = d->height = NULL;
  d->v_piccprofile = NULL;
  d->v_iccprofile = NULL;
  d->v_style = NULL;
  d->creation = d->dragging = FALSE;
  d->selected = -1;
  d->last_selected = -1;
  d->has_changed = FALSE;
 
  dt_init_print_info(&d->prt);
  dt_view_print_settings(darktable.view_manager, &d->prt, &d->imgs);
 
  d->profiles = _get_profiles();
 
  d->imgs.motion_over = -1;
 
  const char *str = dt_conf_get_string_const("plugins/print/print/unit");
  const char **names = _unit_names;
  for(_unit_t i=0; *names; names++, i++)
    if(g_strcmp0(str, *names) == 0)
      d->unit = i;
 
  dt_printing_clear_boxes(&d->imgs);
 
  // set all margins + unit from settings
 
  const float top_b = dt_conf_get_float("plugins/print/print/top_margin");
  const float bottom_b = dt_conf_get_float("plugins/print/print/bottom_margin");
  const float left_b = dt_conf_get_float("plugins/print/print/left_margin");
  const float right_b = dt_conf_get_float("plugins/print/print/right_margin");
 
  d->prt.page.margin_top = _to_mm(d, top_b);
  d->prt.page.margin_bottom = _to_mm(d, bottom_b);
  d->prt.page.margin_left = _to_mm(d, left_b);
  d->prt.page.margin_right = _to_mm(d, right_b);
 
  //  create the spin-button now as values could be set when the printer has no hardware margin
 
  // FIXME: set digits/increments on all of these by calling _unit_changed() later?
  int n_digits;
  float incr;
  _precision_by_unit(d->unit, &n_digits, &incr, NULL);
 
  d->b_top    = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_left   = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_right  = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_bottom = gtk_spin_button_new_with_range(0, 1000, incr);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_top),    n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_bottom), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_left),   n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_right),  n_digits);
 
  d->b_x      = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_y      = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_width  = gtk_spin_button_new_with_range(0, 1000, incr);
  d->b_height = gtk_spin_button_new_with_range(0, 1000, incr);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_x), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_y), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_width), n_digits);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->b_height), n_digits);
 
  d->grid_size = gtk_spin_button_new_with_range(0, 100, incr);
  gtk_spin_button_set_digits(GTK_SPIN_BUTTON(d->grid_size),  n_digits);
 
  gtk_entry_set_alignment(GTK_ENTRY(d->b_top), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_left), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_right), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_bottom), 1);
 
  gtk_entry_set_alignment(GTK_ENTRY(d->b_x), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_y), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_width), 1);
  gtk_entry_set_alignment(GTK_ENTRY(d->b_height), 1);
 
  gtk_entry_set_alignment(GTK_ENTRY(d->grid_size), 1);
 
 
 
  // create papers combo as filled when adding printers
  d->papers = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
 
  label = dt_ui_section_label_new(_("printer"));
  gtk_box_pack_start(GTK_BOX(self->widget), label, TRUE, TRUE, 0);
  dt_gui_add_help_link(self->widget, dt_get_help_url("print_settings_printer"));
  d->printers = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
 
  gtk_box_pack_start(GTK_BOX(self->widget), d->printers, TRUE, TRUE, 0);
  g_signal_connect(G_OBJECT(d->printers), "value-changed", G_CALLBACK(_printer_changed), self);
 
 
  d->media = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
 
  dt_bauhaus_widget_set_label(d->media, N_("media"));
 
  g_signal_connect(G_OBJECT(d->media), "value-changed", G_CALLBACK(_media_changed), self);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->media), TRUE, TRUE, 0);
 
  //  Add printer profile combo
 
  d->pprofile = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->pprofile, N_("profile"));
 
  int combo_idx, n;
 
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->pprofile), TRUE, TRUE, 0);
  int printer_profile_type = dt_conf_get_int("plugins/print/printer/icctype");
  const char *printer_profile = dt_conf_get_string_const("plugins/print/printer/iccprofile");
  combo_idx = -1;
  n = 0;
 
  dt_bauhaus_combobox_add(d->pprofile, _("color management in printer driver"));
  for(const GList *l = d->profiles; l; l = g_list_next(l))
  {
    dt_lib_export_profile_t *prof = (dt_lib_export_profile_t *)l->data;
    // do not add built-in profiles, these are in no way for printing
    if(prof->type == DT_COLORSPACE_FILE)
    {
      dt_bauhaus_combobox_add(d->pprofile, prof->name);
      prof->ppos = ++n;
      if(prof->type == printer_profile_type &&
        (prof->type != DT_COLORSPACE_FILE || !g_strcmp0(prof->filename, printer_profile)))
      {
        dt_free(d->v_piccprofile);
        d->v_picctype = printer_profile_type;
        d->v_piccprofile = g_strdup(printer_profile);
        combo_idx = n;
      }
    }
  }
 
  // profile not found, maybe a profile has been removed? revert to none
  if(combo_idx == -1)
  {
    dt_conf_set_int("plugins/print/printer/icctype", DT_COLORSPACE_NONE);
    dt_conf_set_string("plugins/print/printer/iccprofile", "");
    dt_free(d->v_piccprofile);
    d->v_picctype = DT_COLORSPACE_NONE;
    d->v_piccprofile = g_strdup("");
    combo_idx = 0;
  }
  dt_bauhaus_combobox_set(d->pprofile, combo_idx);
 
  char *tooltip = g_strdup_printf(_("printer ICC profiles in %s or %s"), user_profile_dir, system_profile_dir);
  gtk_widget_set_tooltip_text(d->pprofile, tooltip);
  dt_free(tooltip);
 
  g_signal_connect(G_OBJECT(d->pprofile), "value-changed", G_CALLBACK(_printer_profile_changed), (gpointer)self);
 
  //  Add printer intent combo
 
  d->pintent = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->pintent, N_("intent"));
  dt_bauhaus_combobox_add(d->pintent, _("perceptual"));
  dt_bauhaus_combobox_add(d->pintent, _("relative colorimetric"));
  dt_bauhaus_combobox_add(d->pintent, C_("rendering intent", "saturation"));
  dt_bauhaus_combobox_add(d->pintent, _("absolute colorimetric"));
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->pintent), TRUE, TRUE, 0);
 
  d->v_pintent = dt_conf_get_int("plugins/print/printer/iccintent");
  dt_bauhaus_combobox_set(d->pintent, d->v_pintent);
 
  g_signal_connect (G_OBJECT (d->pintent), "value-changed", G_CALLBACK (_printer_intent_callback), (gpointer)self);
  d->prt.printer.intent = d->v_pintent;
 
  d->black_point_compensation = gtk_check_button_new_with_label(_("black point compensation"));
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->black_point_compensation), TRUE, FALSE, 0);
  g_signal_connect(d->black_point_compensation, "toggled", G_CALLBACK(_printer_bpc_callback), (gpointer)self);
 
  d->v_black_point_compensation = dt_conf_get_bool("plugins/print/print/black_point_compensation");
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(d->black_point_compensation), d->v_black_point_compensation);
 
  gtk_widget_set_tooltip_text(d->black_point_compensation,
                              _("activate black point compensation when applying the printer profile"));
 
  gtk_widget_set_sensitive(GTK_WIDGET(d->black_point_compensation), combo_idx==0?FALSE:TRUE);
 
 
  label = dt_ui_section_label_new(_("page"));
  gtk_box_pack_start(GTK_BOX(self->widget), label, TRUE, TRUE, 0);
  dt_gui_add_help_link(self->widget, dt_get_help_url("print_settings_page"));
 
 
  dt_bauhaus_widget_set_label(d->papers, N_("paper size"));
 
  g_signal_connect(G_OBJECT(d->papers), "value-changed", G_CALLBACK(_paper_changed), self);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->papers), TRUE, TRUE, 0);
 
 
  d->orientation = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->orientation, N_("orientation"));
  dt_bauhaus_combobox_add(d->orientation, _("portrait"));
  dt_bauhaus_combobox_add(d->orientation, _("landscape"));
  g_signal_connect(G_OBJECT(d->orientation), "value-changed", G_CALLBACK(_orientation_changed), self);
  dt_bauhaus_combobox_set(d->orientation, d->prt.page.landscape?1:0);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->orientation), TRUE, TRUE, 0);
 
  // NOTE: units has no label, which makes for cleaner UI but means that no action can be assigned
  GtkWidget *ucomb = dt_bauhaus_combobox_new_full(darktable.bauhaus, DT_GUI_MODULE(NULL), _("measurement units"), NULL, (int)d->unit,
                                                  (GtkCallback)_unit_changed, self, _unit_names);
  gtk_box_pack_start(GTK_BOX(self->widget), ucomb, TRUE, TRUE, 0);
 
 
  GtkWidget *hboxdim = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  label = gtk_label_new(_("image width/height"));
  gtk_box_pack_start(GTK_BOX(hboxdim), GTK_WIDGET(label), TRUE, TRUE, DT_PIXEL_APPLY_DPI(3));
  d->width = gtk_label_new(_("width"));
  gtk_box_pack_start(GTK_BOX(hboxdim), GTK_WIDGET(d->width), TRUE, TRUE, 0);
  label = gtk_label_new(_(" x "));
  gtk_box_pack_start(GTK_BOX(hboxdim), GTK_WIDGET(label), TRUE, TRUE, 0);
  d->height = gtk_label_new(_("height"));
  gtk_box_pack_start(GTK_BOX(hboxdim), GTK_WIDGET(d->height), TRUE, TRUE, 0);
 
 
  GtkWidget *hboxinfo = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  label = gtk_label_new(_("scale factor"));
  gtk_box_pack_start(GTK_BOX(hboxinfo), GTK_WIDGET(label), TRUE, TRUE, DT_PIXEL_APPLY_DPI(3));
  d->info = gtk_label_new("1.0");
  gtk_box_pack_start(GTK_BOX(hboxinfo), GTK_WIDGET(d->info), TRUE, TRUE, 0);
  gtk_widget_set_tooltip_text(hboxinfo,
               _("image scale factor from native printer DPI:\n"
                 " < 1 means that it is downscaled (best quality)\n"
                 " > 1 means that the image is upscaled\n"
                 " a too large value may result in poor print quality"));
 
 
  GtkGrid *bds = GTK_GRID(gtk_grid_new());
  gtk_grid_set_row_spacing(bds, DT_GUI_BOX_SPACING);
  gtk_grid_set_column_spacing(bds, DT_GUI_BOX_SPACING);
 
  d->lock_activated = FALSE;
 
  //d->b_top  = gtk_spin_button_new_with_range(0, 10000, 1);
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->b_top), _("top margin"));
  gtk_grid_attach(bds, GTK_WIDGET(d->b_top), 1, 0, 1, 1);
 
  //d->b_left  = gtk_spin_button_new_with_range(0, 10000, 1);
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->b_left), _("left margin"));
  gtk_grid_attach(bds, GTK_WIDGET(d->b_left), 0, 1, 1, 1);
 
  d->lock_button = GTK_TOGGLE_BUTTON(gtk_toggle_button_new_with_label(_("lock")));
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->lock_button), _("change all margins uniformly"));
  gtk_grid_attach(bds, GTK_WIDGET(d->lock_button), 1, 1, 1, 1);
 
  //d->b_right  = gtk_spin_button_new_with_range(0, 10000, 1);
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->b_right), _("right margin"));
  gtk_grid_attach(bds, GTK_WIDGET(d->b_right), 2, 1, 1, 1);
 
  //d->b_bottom  = gtk_spin_button_new_with_range(0, 10000, 1);
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->b_bottom), _("bottom margin"));
  gtk_grid_attach(bds, GTK_WIDGET(d->b_bottom), 1, 2, 1, 1);
 
  gtk_widget_set_halign(GTK_WIDGET(bds), GTK_ALIGN_CENTER);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(bds), TRUE, TRUE, 0);
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(d->b_top), top_b);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(d->b_bottom), bottom_b);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(d->b_left), left_b);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(d->b_right), right_b);
 
  g_signal_connect(G_OBJECT (d->b_top), "value-changed",
                   G_CALLBACK (_top_border_callback), self);
  g_signal_connect(G_OBJECT (d->b_bottom), "value-changed",
                   G_CALLBACK (_bottom_border_callback), self);
  g_signal_connect(G_OBJECT (d->b_left), "value-changed",
                   G_CALLBACK (_left_border_callback), self);
  g_signal_connect(G_OBJECT (d->b_right), "value-changed",
                   G_CALLBACK (_right_border_callback), self);
  g_signal_connect(G_OBJECT(d->lock_button), "toggled",
                   G_CALLBACK(_lock_callback), self);
 
  gtk_widget_set_halign(GTK_WIDGET(hboxdim), GTK_ALIGN_CENTER);
  gtk_widget_set_halign(GTK_WIDGET(hboxinfo), GTK_ALIGN_CENTER);
 
  const gboolean lock_active = dt_conf_get_bool("plugins/print/print/lock_borders");
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(d->lock_button), lock_active);
 
  // grid & snap grid
  {
    GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
    GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
 
    d->grid = gtk_check_button_new_with_label(_("display grid"));
    // d->grid_size = gtk_spin_button_new_with_range(0, 100, 0.1);
    gtk_box_pack_start(GTK_BOX(hbox), GTK_WIDGET(d->grid), TRUE, TRUE, 0);
    gtk_box_pack_start(GTK_BOX(hbox), GTK_WIDGET(d->grid_size), TRUE, TRUE, 0);
 
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(d->grid_size),
                              dt_conf_get_float("plugins/print/print/grid_size") * units[d->unit]);
 
    gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(hbox), TRUE, TRUE, 0);
 
    d->snap_grid = gtk_check_button_new_with_label(_("snap to grid"));
    gtk_box_pack_start(GTK_BOX(vbox), GTK_WIDGET(d->snap_grid), TRUE, TRUE, 0);
 
    gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(vbox), TRUE, TRUE, 0);
 
    g_signal_connect(G_OBJECT(d->grid_size), "value-changed", G_CALLBACK(_grid_size_changed), self);
    g_signal_connect(G_OBJECT(d->grid), "toggled", G_CALLBACK(_grid_callback), self);
    g_signal_connect(d->snap_grid, "toggled", G_CALLBACK(_snap_grid_callback), (gpointer)self);
  }
 
  d->borderless = gtk_check_button_new_with_label(_("borderless mode required"));
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->borderless), TRUE, TRUE, 0);
  gtk_widget_set_tooltip_text(d->borderless,
                              _("indicates that the borderless mode should be activated\n"
                                "in the printer driver because the selected margins are\n"
                                "below the printer hardware margins"));
  gtk_widget_set_sensitive(d->borderless, FALSE);
 
  // pack image dimension hbox here
 
  label = dt_ui_section_label_new(_("image layout"));
  gtk_box_pack_start(GTK_BOX(self->widget), label, TRUE, TRUE, 0);
  dt_gui_add_help_link(self->widget, dt_get_help_url("print_image_layout"));
 
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hboxdim), TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hboxinfo), TRUE, TRUE, 0);
 
 
  // Auto-fit: Create the 3x3 gtk table toggle button table...
  GtkGrid *bat = GTK_GRID(gtk_grid_new());
  gtk_grid_set_row_spacing(bat, DT_GUI_BOX_SPACING);
  gtk_grid_set_column_spacing(bat, DT_GUI_BOX_SPACING);
  for(int i=0; i<9; i++)
  {
    d->dtba[i]
        = DTGTK_TOGGLEBUTTON(dtgtk_togglebutton_new(dtgtk_cairo_paint_alignment, (CPF_SPECIAL_FLAG << i), NULL));
    gtk_grid_attach (GTK_GRID (bat), GTK_WIDGET (d->dtba[i]), (i%3), i/3, 1, 1);
    g_signal_connect (G_OBJECT (d->dtba[i]), "toggled",G_CALLBACK (_alignment_callback), self);
  }
 
  GtkWidget *hbox22 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  GtkWidget *label4 = gtk_label_new(_("alignment"));
  gtk_box_pack_start(GTK_BOX(hbox22),GTK_WIDGET(label4),TRUE,TRUE,0);
  gtk_box_pack_start(GTK_BOX(hbox22), GTK_WIDGET(bat), TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hbox22), TRUE, TRUE, 0);
 
  // Manual fit
  GtkWidget *hfitbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
 
  GtkWidget *mfitbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
 
  GtkGrid *fitbut = GTK_GRID(gtk_grid_new());
  gtk_grid_set_row_spacing(fitbut, DT_GUI_BOX_SPACING);
  gtk_grid_set_column_spacing(fitbut, DT_GUI_BOX_SPACING);
  gtk_grid_set_column_homogeneous(fitbut, TRUE);
  gtk_grid_set_row_homogeneous(fitbut, TRUE);
 
  GtkWidget *bnew = dt_action_button_new(self, N_("new image area"), _page_new_area_clicked, self,
                                         _("add a new image area on the page\n"
                                           "click and drag on the page to place the area\n"
                                           "drag&drop image from film strip on it"), 0, 0);
 
  d->del = dt_action_button_new(self, N_("delete image area"), _page_delete_area_clicked, self,
                                _("delete the currently selected image area"), 0, 0);
  gtk_widget_set_sensitive(d->del, FALSE);
 
  GtkWidget *bclear = dt_action_button_new(self, N_("clear layout"), _page_clear_area_clicked, self,
                                           _("remove all image areas from the page"), 0, 0);
 
  gtk_grid_attach(fitbut, GTK_WIDGET(bnew), 0, 0, 2, 1);
  gtk_grid_attach(fitbut, GTK_WIDGET(d->del), 0, 1, 1, 1);
  gtk_grid_attach(fitbut, GTK_WIDGET(bclear), 1, 1, 1, 1);
 
  gtk_box_pack_start(GTK_BOX(mfitbox), GTK_WIDGET(fitbut), TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(hfitbox), GTK_WIDGET(mfitbox), TRUE, TRUE, 0);
 
  // X x Y
  GtkWidget *box;
  // FIXME: add labels to x/y/width/height as otherwise are obscure -- and there is the horizontal space to do this
 
  box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  // d->b_x = gtk_spin_button_new_with_range(0, 1000, 1);
  gtk_widget_set_tooltip_text(d->b_x, _("image area x origin (in current unit)"));
  gtk_entry_set_width_chars(GTK_ENTRY(d->b_x), 5);
 
  // d->b_y = gtk_spin_button_new_with_range(0, 1000, 1);
  gtk_widget_set_tooltip_text(d->b_y, _("image area y origin (in current unit)"));
  gtk_entry_set_width_chars(GTK_ENTRY(d->b_y), 5);
 
  gtk_box_pack_start(GTK_BOX(box), GTK_WIDGET(d->b_x), TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(box), GTK_WIDGET(d->b_y), TRUE, TRUE, 0);
 
  gtk_box_pack_start(GTK_BOX(hfitbox), GTK_WIDGET(box), TRUE, TRUE, 0);
 
  // width x height
  box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  // d->b_width = gtk_spin_button_new_with_range(0, 1000, 1);
  gtk_widget_set_tooltip_text(d->b_width, _("image area width (in current unit)"));
  gtk_entry_set_width_chars(GTK_ENTRY(d->b_width), 5);
 
  // d->b_height = gtk_spin_button_new_with_range(0, 1000, 1);
  gtk_widget_set_tooltip_text(d->b_height, _("image area height (in current unit)"));
  gtk_entry_set_width_chars(GTK_ENTRY(d->b_height), 5);
 
  gtk_box_pack_start(GTK_BOX(box), GTK_WIDGET(d->b_width), TRUE, TRUE, 0);
  gtk_box_pack_start(GTK_BOX(box), GTK_WIDGET(d->b_height), TRUE, TRUE, 0);
 
  gtk_box_pack_start(GTK_BOX(hfitbox), GTK_WIDGET(box), TRUE, TRUE, 0);
 
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hfitbox), TRUE, TRUE, 0);
 
  gtk_widget_add_events(d->b_x, GDK_BUTTON_PRESS_MASK);
  gtk_widget_add_events(d->b_y, GDK_BUTTON_PRESS_MASK);
  gtk_widget_add_events(d->b_width, GDK_BUTTON_PRESS_MASK);
  gtk_widget_add_events(d->b_height, GDK_BUTTON_PRESS_MASK);
 
  g_signal_connect(G_OBJECT(d->b_x), "value-changed", G_CALLBACK(_x_changed), (gpointer)d);
  g_signal_connect(G_OBJECT(d->b_y), "value-changed", G_CALLBACK(_y_changed), (gpointer)d);
  g_signal_connect(G_OBJECT(d->b_width), "value-changed", G_CALLBACK(_width_changed), (gpointer)d);
  g_signal_connect(G_OBJECT(d->b_height), "value-changed", G_CALLBACK(_height_changed), (gpointer)d);
 
 
  label = dt_ui_section_label_new(_("print settings"));
  gtk_box_pack_start(GTK_BOX(self->widget), label, TRUE, TRUE, 0);
  dt_gui_add_help_link(self->widget, dt_get_help_url("print_settings"));
 
  //  Add export profile combo
 
  d->profile = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->profile, N_("profile"));
 
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->profile), TRUE, TRUE, 0);
  dt_bauhaus_combobox_add(d->profile, _("image settings"));
 
  const int icctype = dt_conf_get_int("plugins/print/print/icctype");
  const gchar *iccprofile = dt_conf_get_string_const("plugins/print/print/iccprofile");
  combo_idx = -1;
  n = 0;
 
  for(const GList *l = d->profiles; l; l = g_list_next(l))
  {
    dt_lib_export_profile_t *prof = (dt_lib_export_profile_t *)l->data;
    dt_bauhaus_combobox_add(d->profile, prof->name);
    prof->pos = ++n;
    if(prof->type == icctype
       && (prof->type != DT_COLORSPACE_FILE || !g_strcmp0(prof->filename, iccprofile)))
    {
      dt_free(d->v_iccprofile);
      d->v_icctype = icctype;
      d->v_iccprofile = g_strdup(iccprofile);
      combo_idx = n;
    }
  }
 
  if(combo_idx == -1)
  {
    dt_conf_set_int("plugins/print/print/icctype", DT_COLORSPACE_NONE);
    dt_conf_set_string("plugins/print/print/iccprofile", "");
    dt_free(d->v_iccprofile);
    d->v_icctype = DT_COLORSPACE_NONE;
    d->v_iccprofile = g_strdup("");
    combo_idx = 0;
  }
 
  dt_bauhaus_combobox_set(d->profile, combo_idx);
 
  tooltip = g_strdup_printf(_("output ICC profiles in %s or %s"), user_profile_dir, system_profile_dir);
  gtk_widget_set_tooltip_text(d->profile, tooltip);
  dt_free(tooltip);
 
  g_signal_connect(G_OBJECT(d->profile), "value-changed", G_CALLBACK(_profile_changed), (gpointer)self);
 
  //  Add export intent combo
 
  d->intent = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->intent, N_("intent"));
 
  dt_bauhaus_combobox_add(d->intent, _("image settings"));
  dt_bauhaus_combobox_add(d->intent, _("perceptual"));
  dt_bauhaus_combobox_add(d->intent, _("relative colorimetric"));
  dt_bauhaus_combobox_add(d->intent, C_("rendering intent", "saturation"));
  dt_bauhaus_combobox_add(d->intent, _("absolute colorimetric"));
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->intent), TRUE, TRUE, 0);
 
  dt_bauhaus_combobox_set(d->intent, dt_conf_get_int("plugins/print/print/iccintent") + 1);
 
  g_signal_connect (G_OBJECT (d->intent), "value-changed", G_CALLBACK (_intent_callback), (gpointer)self);
 
  //  Add export style combo
 
  d->style = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(d->style, N_("style"));
 
  dt_bauhaus_combobox_add(d->style, _("none"));
 
  GList *styles = dt_styles_get_list("");
  const char *current_style = dt_conf_get_string_const("plugins/print/print/style");
  combo_idx = -1; n=0;
 
  for(const GList *st_iter = styles; st_iter; st_iter = g_list_next(st_iter))
  {
    dt_style_t *style=(dt_style_t *)st_iter->data;
    dt_bauhaus_combobox_add(d->style, style->name);
    n++;
    if(g_strcmp0(style->name,current_style)==0)
    {
      dt_free(d->v_style);
      d->v_style = g_strdup(current_style);
      combo_idx=n;
    }
  }
  g_list_free_full(styles, dt_style_free);
  styles = NULL;
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->style), TRUE, TRUE, 0);
  gtk_widget_set_tooltip_text(d->style, _("temporary style to use while printing"));
 
  // style not found, maybe a style has been removed? revert to none
  if(combo_idx == -1)
  {
    dt_conf_set_string("plugins/print/print/style", "");
    dt_free(d->v_style);
    d->v_style = g_strdup("");
    combo_idx=0;
  }
  dt_bauhaus_combobox_set(d->style, combo_idx);
 
  g_signal_connect (G_OBJECT (d->style), "value-changed",
                    G_CALLBACK (_style_callback),
                    (gpointer)self);
 
  // Print button
 
  GtkWidget *button = dt_action_button_new(self, N_("print"), _print_button_clicked, self,
                                           _("print with current settings"), GDK_KEY_p, GDK_CONTROL_MASK);
  d->print_button = GTK_BUTTON(button);
  gtk_box_pack_start(GTK_BOX(self->widget), button, TRUE, TRUE, 0);
  dt_gui_add_help_link(button, dt_get_help_url("print_settings_button"));
 
  dt_free(system_profile_dir);
  dt_free(user_profile_dir);
 
  // Let's start the printer discovery now
 
  dt_printers_discovery(_new_printer_callback, self);
}
 
void *legacy_params(dt_lib_module_t *self, const void *const old_params, const size_t old_params_size,
                    const int old_version, int *new_version, size_t *new_size)
{
  if(old_version == 1)
  {
    // we added the profile type
    //
    // old format:
    //   char *printer
    //   char *paper
    //   int32_t landscape
    //   char *f_profile
    //   int32_t intent
    //   char *f_pprofile
    //   <rest>
    //
    // new format:
    //   char *printer
    //   char *paper
    //   int32_t landscape
    //   int32_t f_profile_type
    //   char *f_profile
    //   int32_t intent
    //   int32_t f_pprofile_type
    //   char *f_pprofile
    //   <rest>
 
    const char *buf = (const char *)old_params;
 
    // printer
    const char *printer = buf;
    const int32_t printer_len = strlen(printer) + 1;
    buf += printer_len;
 
    // paper
    const char *paper = buf;
    const int32_t paper_len = strlen(paper) + 1;
    buf += paper_len;
 
    // landscape
    const int32_t landscape = *(int32_t *)buf;
    buf +=  sizeof(int32_t);
 
    // profile
    const char *profile = buf;
    const int32_t profile_len = strlen(profile) + 1;
    buf += profile_len;
 
    // intent
    const int32_t intent = *(int32_t *)buf;
    buf += sizeof(int32_t);
 
    // pprofile
    const char *pprofile = buf;
    const int32_t pprofile_len = strlen(pprofile) + 1;
    buf += pprofile_len;
 
 
    // now we got all fields from the start of the buffer and buf points to the beginning or <rest>
 
    // find the new values for the two profiles
    dt_colorspaces_color_profile_type_t profile_type, pprofile_type;
    const char *profile_filename = "", *pprofile_filename = "";
 
    if(*profile == '\0' || !g_strcmp0(profile, "none"))
    {
      profile_type = DT_COLORSPACE_NONE;
    }
    else if(!g_strcmp0(profile, "sRGB"))
    {
      profile_type = DT_COLORSPACE_SRGB;
    }
    else if(!g_strcmp0(profile, "adobergb"))
    {
      profile_type = DT_COLORSPACE_ADOBERGB;
    }
    else
    {
      profile_type = DT_COLORSPACE_FILE;
      profile_filename = &profile[1]; // the old code had a '/' in the beginning
    }
 
    // in theory pprofile can't be srgb or adobergb, but checking for them won't hurt
    if(*pprofile == '\0')
    {
      pprofile_type = DT_COLORSPACE_NONE;
    }
    else if(!g_strcmp0(pprofile, "sRGB"))
    {
      pprofile_type = DT_COLORSPACE_SRGB;
    }
    else if(!g_strcmp0(pprofile, "adobergb"))
    {
      pprofile_type = DT_COLORSPACE_ADOBERGB;
    }
    else
    {
      pprofile_type = DT_COLORSPACE_FILE;
      pprofile_filename = &pprofile[1]; // the old code had a '/' in the beginning
    }
 
    const int32_t new_profile_len = strlen(profile_filename) + 1;
    const int32_t new_pprofile_len = strlen(pprofile_filename) + 1;
 
    // now we got everything to reassemble the new params
    size_t new_params_size = old_params_size - profile_len - pprofile_len;
    new_params_size += 2 * sizeof(dt_colorspaces_color_profile_type_t);
    new_params_size += new_profile_len + new_pprofile_len;
    void *new_params = malloc(new_params_size);
 
    size_t pos = 0;
    //   char *printer
    memcpy((uint8_t *)new_params + pos, printer, printer_len);
    pos += printer_len;
    //   char *paper
    memcpy((uint8_t *)new_params + pos, paper, paper_len);
    pos += paper_len;
    //   int32_t landscape
    memcpy((uint8_t *)new_params + pos, &landscape, sizeof(int32_t));
    pos += sizeof(int32_t);
    //   int32_t f_profile_type
    memcpy((uint8_t *)new_params + pos, &profile_type, sizeof(int32_t));
    pos += sizeof(int32_t);
    //   char *f_profile
    memcpy((uint8_t *)new_params + pos, profile_filename, new_profile_len);
    pos += new_profile_len;
    //   int32_t intent
    memcpy((uint8_t *)new_params + pos, &intent, sizeof(int32_t));
    pos += sizeof(int32_t);
    //   int32_t f_pprofile_type
    memcpy((uint8_t *)new_params + pos, &pprofile_type, sizeof(int32_t));
    pos += sizeof(int32_t);
    //   char *f_pprofile
    memcpy((uint8_t *)new_params + pos, pprofile_filename, new_pprofile_len);
    pos += new_pprofile_len;
    //   <rest>
    memcpy((uint8_t *)new_params + pos, buf, old_params_size - ((char *)buf - (char *)old_params));
 
    *new_size = new_params_size;
    *new_version = 2;
    return new_params;
  }
  else if(old_version == 2)
  {
    // add upscale to params
    size_t new_params_size = old_params_size + 1;
    void *new_params = calloc(1, new_params_size);
 
    memcpy(new_params, old_params, old_params_size);
    // no media type specified
    ((char *)new_params)[old_params_size] = '\0';
 
    *new_size = new_params_size;
    *new_version = 3;
    return new_params;
  }
  else if(old_version == 3)
  {
    // no box
    size_t new_params_size = old_params_size + sizeof(int32_t) + 4 * sizeof(float);
    void *new_params = calloc(1, new_params_size);
 
    memcpy(new_params, old_params, old_params_size);
 
    // single image box specified (there is no way to create a box on the size
    // of the page at this stage).
    int32_t idx = old_params_size;
    *(int32_t *)((uint8_t *)new_params + idx) = 1;
    idx += sizeof(int32_t);
    *(float *)((uint8_t *)new_params + idx) = 0.05f;
    idx += sizeof(float);
    *(float *)((uint8_t *)new_params + idx) = 0.05f;
    idx += sizeof(float);
    *(float *)((uint8_t *)new_params + idx) = 0.90f;
    idx += sizeof(float);
    *(float *)((uint8_t *)new_params + idx) = 0.90f;
    // idx += sizeof(float);
 
    *new_size = new_params_size;
    *new_version = 4;
    return new_params;
  }
 
  return NULL;
}
 
int set_params(dt_lib_module_t *self, const void *params, int size)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  if(IS_NULL_PTR(params)) return 1;
 
  // get the parameters buffer
  const char *buf = (char *)params;
 
  // get individual items
  const char *printer = buf;
  if(IS_NULL_PTR(printer)) return 1;
  const int32_t printer_len = strlen(printer) + 1;
  buf += printer_len;
 
  const char *paper = buf;
  if(IS_NULL_PTR(paper)) return 1;
  const int32_t paper_len = strlen(paper) + 1;
  buf += paper_len;
 
  const int32_t landscape = *(int32_t *)buf;
  buf +=  sizeof(int32_t);
 
  const int32_t f_profile_type = *(int32_t *)buf;
  buf +=  sizeof(int32_t);
 
  const char *f_profile = buf;
  if(IS_NULL_PTR(f_profile)) return 1;
  const int32_t profile_len = strlen(f_profile) + 1;
  buf += profile_len;
 
  const int32_t intent = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  const int32_t f_pprofile_type = *(int32_t *)buf;
  buf +=  sizeof(int32_t);
 
  const char *f_pprofile = buf;
  if(IS_NULL_PTR(f_pprofile)) return 1;
  const int32_t pprofile_len = strlen(f_pprofile) + 1;
  buf += pprofile_len;
 
  const int32_t pintent = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  const int32_t bpc = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  const char *style = buf;
  if(IS_NULL_PTR(style)) return 1;
  const int32_t style_len = strlen(style) + 1;
  buf += style_len;
 
  //const int32_t style_mode = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  const double b_top = *(double *)buf;
  buf += sizeof(double);
 
  const double b_bottom = *(double *)buf;
  buf += sizeof(double);
 
  const double b_left = *(double *)buf;
  buf += sizeof(double);
 
  const double b_right = *(double *)buf;
  buf += sizeof(double);
 
  const int32_t alignment = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  const char *media = buf;
  if(IS_NULL_PTR(media)) return 1;
  const int32_t media_len = strlen(media) + 1;
  buf += media_len;
 
  ps->imgs.count = *(int32_t *)buf;
  buf += sizeof(int32_t);
 
  for(int k=0; k<ps->imgs.count; k++)
  {
    ps->imgs.box[k].pos.x = *(float *)buf;
    buf += sizeof(float);
    ps->imgs.box[k].pos.y = *(float *)buf;
    buf += sizeof(float);
    ps->imgs.box[k].pos.width = *(float *)buf;
    buf += sizeof(float);
    ps->imgs.box[k].pos.height = *(float *)buf;
    buf += sizeof(float);
  }
 
  // ensure that the size is correct
  if(size != printer_len + paper_len + media_len + profile_len + pprofile_len + style_len + 8 * sizeof(int32_t) + 4 * sizeof(double) + sizeof(int32_t) + (ps->imgs.count * 4 * sizeof(float)))
    return 1;
 
  // set the GUI with corresponding values
  if(printer[0] != '\0')
    dt_bauhaus_combobox_set_from_text(ps->printers, printer);
 
  if(paper[0] != '\0')
    dt_bauhaus_combobox_set_from_text(ps->papers, paper);
 
  if(media[0] != '\0')
    dt_bauhaus_combobox_set_from_text(ps->media, media);
 
  dt_bauhaus_combobox_set (ps->orientation, landscape);
 
  dt_bauhaus_combobox_set(ps->profile, 0);
  for(GList *iter = ps->profiles; iter; iter = g_list_next(iter))
  {
    dt_lib_export_profile_t *p = (dt_lib_export_profile_t *)iter->data;
    if(f_profile_type == p->type && (f_profile_type != DT_COLORSPACE_FILE || !g_strcmp0(f_profile, p->filename)))
    {
      dt_bauhaus_combobox_set(ps->profile, p->pos);
      break;
    }
  }
 
  dt_bauhaus_combobox_set (ps->intent, intent);
 
  dt_bauhaus_combobox_set(ps->pprofile, 0);
  for(GList *iter = ps->profiles; iter; iter = g_list_next(iter))
  {
    dt_lib_export_profile_t *p = (dt_lib_export_profile_t *)iter->data;
    if(f_pprofile_type == p->type && (f_pprofile_type != DT_COLORSPACE_FILE || !g_strcmp0(f_pprofile, p->filename)))
    {
      dt_bauhaus_combobox_set(ps->pprofile, p->ppos);
      break;
    }
  }
 
  dt_bauhaus_combobox_set (ps->pintent, pintent);
  ps->prt.printer.intent = pintent;
 
  if(style[0] != '\0')
    dt_bauhaus_combobox_set_from_text(ps->style, style);
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_top), b_top * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_bottom), b_bottom * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_left), b_left * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_right), b_right * units[ps->unit]);
 
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->dtba[alignment]), TRUE);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->black_point_compensation), bpc);
 
  dt_control_queue_redraw_center();
 
  return 0;
}
 
void *get_params(dt_lib_module_t *self, int *size)
{
  const dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  // get the data
  const char *printer = dt_bauhaus_combobox_get_text(ps->printers);
  const char *paper = dt_bauhaus_combobox_get_text(ps->papers);
  const char *media = dt_bauhaus_combobox_get_text(ps->media);
  const int32_t profile_pos = dt_bauhaus_combobox_get(ps->profile);
  const int32_t intent =  dt_bauhaus_combobox_get(ps->intent);
  const char *style = dt_bauhaus_combobox_get_text(ps->style);
  const int32_t style_mode = 0; // deprecated, kept for compatibility
  const int32_t pprofile_pos = dt_bauhaus_combobox_get(ps->pprofile);
  const int32_t pintent =  dt_bauhaus_combobox_get(ps->pintent);
  const int32_t landscape = dt_bauhaus_combobox_get(ps->orientation);
  const int32_t bpc = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(ps->black_point_compensation));
  const double b_top = ps->prt.page.margin_top;
  const double b_bottom = ps->prt.page.margin_bottom;
  const double b_left = ps->prt.page.margin_left;
  const double b_right = ps->prt.page.margin_right;
  const int32_t alignment = 0;
 
  dt_colorspaces_color_profile_type_t profile_type = DT_COLORSPACE_NONE, pprofile_type = DT_COLORSPACE_NONE;
  const char *profile = "", *pprofile = "";
  for(GList *iter = ps->profiles; iter; iter = g_list_next(iter))
  {
    dt_lib_export_profile_t *p = (dt_lib_export_profile_t *)iter->data;
    if(p->pos == profile_pos)
    {
      profile_type = p->type;
      profile = p->filename;
    }
    if(p->ppos == pprofile_pos)
    {
      pprofile_type = p->type;
      pprofile = p->filename;
    }
  }
 
  // these will be NULL when no printer is connected/found
  if(IS_NULL_PTR(printer)) printer = "";
  if(IS_NULL_PTR(paper)) paper = "";
  if(IS_NULL_PTR(media)) media = "";
 
  // compute the size of individual items, always get the \0 for strings
  const int32_t printer_len = strlen (printer) + 1;
  const int32_t paper_len = strlen (paper) + 1;
  const int32_t media_len = strlen (media) + 1;
  const int32_t profile_len = strlen (profile) + 1;
  const int32_t pprofile_len = strlen (pprofile) + 1;
  const int32_t style_len = strlen (style) + 1;
 
  // compute the size of all parameters
  *size = printer_len + paper_len + media_len + profile_len + pprofile_len + style_len + 8 * sizeof(int32_t) + 4 * sizeof(double) + sizeof(int32_t) + (ps->imgs.count * 4 * sizeof(float));
 
  // allocate the parameter buffer
  char *params = (char *)malloc(*size);
 
  int pos = 0;
 
  memcpy(params+pos, printer, printer_len);
  pos += printer_len;
  memcpy(params+pos, paper, paper_len);
  pos += paper_len;
  memcpy(params+pos, &landscape, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, &profile_type, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, profile, profile_len);
  pos += profile_len;
  memcpy(params+pos, &intent, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, &pprofile_type, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, pprofile, pprofile_len);
  pos += pprofile_len;
  memcpy(params+pos, &pintent, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, &bpc, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, style, style_len);
  pos += style_len;
  memcpy(params+pos, &style_mode, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, &b_top, sizeof(double));
  pos += sizeof(double);
  memcpy(params+pos, &b_bottom, sizeof(double));
  pos += sizeof(double);
  memcpy(params+pos, &b_left, sizeof(double));
  pos += sizeof(double);
  memcpy(params+pos, &b_right, sizeof(double));
  pos += sizeof(double);
  memcpy(params+pos, &alignment, sizeof(int32_t));
  pos += sizeof(int32_t);
  memcpy(params+pos, media, media_len);
  pos += media_len;
 
  // boxes
  memcpy(params+pos, &ps->imgs.count, sizeof(int32_t));
  pos += sizeof(int32_t);
 
  for(int k=0; k<ps->imgs.count; k++)
  {
    memcpy(params+pos, &ps->imgs.box[k].pos.x, sizeof(float));
    pos += sizeof(int32_t);
    memcpy(params+pos, &ps->imgs.box[k].pos.y, sizeof(float));
    pos += sizeof(int32_t);
    memcpy(params+pos, &ps->imgs.box[k].pos.width, sizeof(float));
    pos += sizeof(int32_t);
    memcpy(params+pos, &ps->imgs.box[k].pos.height, sizeof(float));
    pos += sizeof(int32_t);
  }
 
  g_assert(pos == *size);
 
  return params;
}
 
void gui_cleanup(dt_lib_module_t *self)
{
  if(IS_NULL_PTR(self->data)) return;
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  // these can be called on shutdown, resulting in null-pointer
  // dereference and division by zero -- not sure what interaction
  // makes them called, but better to disconnect and not have segfault
  g_signal_handlers_disconnect_by_func(G_OBJECT(ps->b_top), G_CALLBACK(_top_border_callback), self);
  g_signal_handlers_disconnect_by_func(G_OBJECT(ps->b_bottom), G_CALLBACK(_bottom_border_callback), self);
  g_signal_handlers_disconnect_by_func(G_OBJECT(ps->b_left), G_CALLBACK(_left_border_callback), self);
  g_signal_handlers_disconnect_by_func(G_OBJECT(ps->b_right), G_CALLBACK(_right_border_callback), self);
 
  g_list_free_full(ps->profiles, dt_free_gpointer);
  ps->profiles = NULL;
  g_list_free_full(ps->paper_list, dt_free_gpointer);
  ps->paper_list = NULL;
  g_list_free_full(ps->media_list, dt_free_gpointer);
  ps->media_list = NULL;
 
  dt_free(ps->v_iccprofile);
  dt_free(ps->v_piccprofile);
  dt_free(ps->v_style);
 
  dt_free(self->data);
}
 
void gui_reset(dt_lib_module_t *self)
{
  dt_lib_print_settings_t *ps = (dt_lib_print_settings_t *)self->data;
 
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_top), 17 * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_bottom), 17 * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_left), 17 * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->b_right), 17 * units[ps->unit]);
  gtk_spin_button_set_value(GTK_SPIN_BUTTON(ps->grid_size), 10 * units[ps->unit]);
 
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->dtba[ALIGNMENT_CENTER]), TRUE);
  ps->prt.printer.intent = DT_INTENT_PERCEPTUAL;
  dt_bauhaus_combobox_set(ps->profile, 0);
  dt_bauhaus_combobox_set(ps->pprofile, 0);
  dt_bauhaus_combobox_set(ps->pintent, 0);
  dt_bauhaus_combobox_set(ps->style, 0);
  dt_bauhaus_combobox_set(ps->intent, 0);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ps->black_point_compensation), TRUE);
  gtk_widget_set_sensitive(GTK_WIDGET(ps->pintent), TRUE);
  gtk_widget_set_sensitive(GTK_WIDGET(ps->black_point_compensation), FALSE);
 
  // reset page orientation to fit the picture if a single one is displayed
 
  const int32_t imgid = (ps->imgs.count > 0) ? ps->imgs.box[0].imgid : -1;
  dt_printing_clear_boxes(&ps->imgs);
  ps->imgs.imgid_to_load = imgid;
 
  ps->creation = ps->dragging = FALSE;
  ps->selected = -1;
  ps->last_selected = -1;
  ps->has_changed = FALSE;
 
  dt_control_queue_redraw_center();
}
 
// clang-format off
// modelines: These editor modelines have been set for all relevant files by tools/update_modelines.py
// vim: shiftwidth=2 expandtab tabstop=2 cindent
// kate: tab-indents: off; indent-width 2; replace-tabs on; indent-mode cstyle; remove-trailing-spaces modified;
// clang-format on