Exemple #1
0
static gboolean
tile_dialog (gint32 image_ID,
             gint32 drawable_ID)
{
  GtkWidget *dlg;
  GtkWidget *vbox;
  GtkWidget *frame;
  GtkWidget *sizeentry;
  GtkWidget *chainbutton;
  GtkWidget *toggle;
  gint       width;
  gint       height;
  gdouble    xres;
  gdouble    yres;
  GimpUnit   unit;
  gboolean   run;

  gimp_ui_init (PLUG_IN_BINARY, FALSE);

  width  = gimp_drawable_width (drawable_ID);
  height = gimp_drawable_height (drawable_ID);
  unit   = gimp_image_get_unit (image_ID);
  gimp_image_get_resolution (image_ID, &xres, &yres);

  tvals.new_width  = width;
  tvals.new_height = height;

  dlg = gimp_dialog_new (_("Tile"), PLUG_IN_BINARY,
                         NULL, 0,
                         gimp_standard_help_func, PLUG_IN_PROC,

                         GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                         GTK_STOCK_OK,     GTK_RESPONSE_OK,

                         NULL);

  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
                                           GTK_RESPONSE_OK,
                                           GTK_RESPONSE_CANCEL,
                                           -1);

  gimp_window_set_transient (GTK_WINDOW (dlg));

  vbox = gtk_vbox_new (FALSE, 12);
  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
                      vbox, TRUE, TRUE, 0);
  gtk_widget_show (vbox);

  frame = gimp_frame_new (_("Tile to New Size"));
  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  sizeentry = gimp_coordinates_new (unit, "%a", TRUE, TRUE, 8,
                                    GIMP_SIZE_ENTRY_UPDATE_SIZE,

                                    tvals.constrain, TRUE,

                                    _("_Width:"), width, xres,
                                    1, GIMP_MAX_IMAGE_SIZE,
                                    0, width,

                                    _("_Height:"), height, yres,
                                    1, GIMP_MAX_IMAGE_SIZE,
                                    0, height);
  gtk_container_add (GTK_CONTAINER (frame), sizeentry);
  gtk_table_set_row_spacing (GTK_TABLE (sizeentry), 1, 6);
  gtk_widget_show (sizeentry);

  chainbutton = GTK_WIDGET (GIMP_COORDINATES_CHAINBUTTON (sizeentry));

  toggle = gtk_check_button_new_with_mnemonic (_("C_reate new image"));
  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), tvals.new_image);
  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
  gtk_widget_show (toggle);

  g_signal_connect (toggle, "toggled",
                    G_CALLBACK (gimp_toggle_button_update),
                    &tvals.new_image);

  gtk_widget_show (dlg);

  run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);

  if (run)
    {
      tvals.new_width =
        RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry), 0));
      tvals.new_height =
        RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry), 1));

      tvals.constrain =
        gimp_chain_button_get_active (GIMP_CHAIN_BUTTON (chainbutton));
    }

  gtk_widget_destroy (dlg);

  return run;
}
Exemple #2
0
static gboolean
pixelize_dialog (GimpDrawable *drawable)
{
  GtkWidget *dialog;
  GtkWidget *main_vbox;
  GtkWidget *preview;
  GtkWidget *sizeentry;
  guint32    image_id;
  GimpUnit   unit;
  gdouble    xres, yres;
  gboolean   run;

  gimp_ui_init (PLUG_IN_BINARY, FALSE);

  dialog = gimp_dialog_new (_("Pixelize"), PLUG_IN_BINARY,
                            NULL, 0,
                            gimp_standard_help_func, PIXELIZE_PROC,

                            GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                            GTK_STOCK_OK,     GTK_RESPONSE_OK,

                            NULL);

  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
                                           GTK_RESPONSE_OK,
                                           GTK_RESPONSE_CANCEL,
                                           -1);

  gimp_window_set_transient (GTK_WINDOW (dialog));

  main_vbox = gtk_vbox_new (FALSE, 12);
  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
  gtk_widget_show (main_vbox);

  preview = gimp_drawable_preview_new (drawable, NULL);
  gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
  gtk_widget_show (preview);
  g_signal_connect_swapped (preview, "invalidated",
                            G_CALLBACK (pixelize),
                            drawable);

  image_id = gimp_drawable_get_image (drawable->drawable_id);
  unit = gimp_image_get_unit (image_id);
  gimp_image_get_resolution (image_id, &xres, &yres);

  sizeentry = gimp_coordinates_new (unit, "%a", TRUE, TRUE, ENTRY_WIDTH,
                                    GIMP_SIZE_ENTRY_UPDATE_SIZE,
                                    TRUE, FALSE,

                                    _("Pixel _width:"),
                                    pvals.pixelwidth, xres,
                                    1, drawable->width,
                                    1, drawable->width,

                                    _("Pixel _height:"),
                                    pvals.pixelheight, yres,
                                    1, drawable->height,
                                    1, drawable->height);

  gtk_box_pack_start (GTK_BOX (main_vbox), sizeentry, FALSE, FALSE, 0);
  gtk_widget_show (sizeentry);
  g_signal_connect (sizeentry, "value-changed",
                    G_CALLBACK (update_pixelsize),
                    preview);
  g_signal_connect (sizeentry, "refval-changed",
                    G_CALLBACK (update_pixelsize),
                    preview);

  gtk_widget_show (dialog);

  run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);

  gtk_widget_destroy (dialog);

  return run;
}
Exemple #3
0
static gint
dog_dialog (gint32        image_ID,
            GimpDrawable *drawable)
{
  GtkWidget *dialog;
  GtkWidget *frame;
  GtkWidget *button;
  GtkWidget *main_vbox;
  GtkWidget *preview;
  GtkWidget *coord;
  GimpUnit   unit;
  gdouble    xres;
  gdouble    yres;
  gboolean   run;

  gimp_ui_init (PLUG_IN_BINARY, FALSE);

  dialog = gimp_dialog_new (_("DoG Edge Detect"), PLUG_IN_BINARY,
                            NULL, 0,
                            gimp_standard_help_func, PLUG_IN_PROC,

                            GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                            GTK_STOCK_OK,     GTK_RESPONSE_OK,

                            NULL);

  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
                                           GTK_RESPONSE_OK,
                                           GTK_RESPONSE_CANCEL,
                                           -1);

  gimp_window_set_transient (GTK_WINDOW (dialog));

  main_vbox = gtk_vbox_new (FALSE, 12);
  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
  gtk_widget_show (main_vbox);

  preview = gimp_drawable_preview_new (drawable, NULL);
  gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
  gtk_widget_show (preview);
  g_signal_connect (preview, "invalidated",
                    G_CALLBACK (preview_update_preview),
                    drawable);

  frame = gimp_frame_new (_("Smoothing Parameters"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  /*  Get the image resolution and unit  */
  gimp_image_get_resolution (image_ID, &xres, &yres);
  unit = gimp_image_get_unit (image_ID);

  coord = gimp_coordinates_new (unit, "%a", TRUE, FALSE, -1,
                                GIMP_SIZE_ENTRY_UPDATE_SIZE,

                                FALSE,
                                TRUE,

                                _("_Radius 1:"), dogvals.inner, xres,
                                0, 8 * MAX (drawable->width, drawable->height),
                                0, 0,

                                _("R_adius 2:"), dogvals.outer, yres,
                                0, 8 * MAX (drawable->width, drawable->height),
                                0, 0);

  gtk_container_add (GTK_CONTAINER (frame), coord);
  gtk_widget_show (coord);

  gimp_size_entry_set_pixel_digits (GIMP_SIZE_ENTRY (coord), 1);
  g_signal_connect (coord, "value-changed",
                    G_CALLBACK (change_radius_callback),
                    preview);

  button = gtk_check_button_new_with_mnemonic (_("_Normalize"));
  gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), dogvals.normalize);
  g_signal_connect (button, "toggled",
                    G_CALLBACK (gimp_toggle_button_update),
                    &dogvals.normalize);
  g_signal_connect_swapped (button, "toggled",
                            G_CALLBACK (gimp_preview_invalidate),
                            preview);
  gtk_widget_show (button);

  button = gtk_check_button_new_with_mnemonic (_("_Invert"));
  gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), dogvals.invert);
  g_signal_connect (button, "toggled",
                    G_CALLBACK (gimp_toggle_button_update),
                    &dogvals.invert);
  g_signal_connect_swapped (button, "toggled",
                            G_CALLBACK (gimp_preview_invalidate),
                            preview);
  gtk_widget_show (button);

  gtk_widget_show (dialog);

  run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);

  if (run)
    {
      dogvals.inner = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (coord), 0);
      dogvals.outer = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (coord), 1);
    }

  gtk_widget_destroy (dialog);


  return run;
}
gboolean
dialog (gint32              image_ID,
	GimpDrawable       *drawable,
	PlugInVals         *vals,
	PlugInImageVals    *image_vals,
	PlugInDrawableVals *drawable_vals,
	PlugInUIVals       *ui_vals)
{
#if 1
    // quarl 2007-03-03
    //     No dialog for now.  Shouldn't be called.
    abort();
#else
  GtkWidget *dlg;
  GtkWidget *main_vbox;
  GtkWidget *frame;
  GtkWidget *table;
  GtkWidget *hbox;
  GtkWidget *hbox2;
  GtkWidget *coordinates;
  GtkWidget *combo;
  GtkObject *adj;
  gint       row;
  gboolean   run = FALSE;
  GimpUnit   unit;
  gdouble    xres, yres;

  ui_state = ui_vals;

  gimp_ui_init (PLUGIN_NAME, TRUE);

  dlg = gimp_dialog_new (_("Deskew"), PLUGIN_NAME,
                         NULL, 0,
			 gimp_standard_help_func, "gimp-deskew-plug-in",

			 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
			 GTK_STOCK_OK,     GTK_RESPONSE_OK,

			 NULL);

  main_vbox = gtk_vbox_new (FALSE, 12);
  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dlg)->vbox), main_vbox);

  /*  gimp_scale_entry_new() examples  */

  frame = gimp_frame_new (_("ScaleEntry Examples"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  table = gtk_table_new (3, 3, FALSE);
  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
  gtk_table_set_row_spacings (GTK_TABLE (table), 2);
  gtk_container_add (GTK_CONTAINER (frame), table);
  gtk_widget_show (table);

  row = 0;

  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
			      _("Dummy 1:"), SCALE_WIDTH, SPIN_BUTTON_WIDTH,
			      vals->dummy1, 0, 100, 1, 10, 0,
			      TRUE, 0, 0,
			      _("Dummy scale entry 1"), NULL);
  g_signal_connect (adj, "value_changed",
                    G_CALLBACK (gimp_int_adjustment_update),
                    &vals->dummy1);

  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
			      _("Dummy 2:"), SCALE_WIDTH, SPIN_BUTTON_WIDTH,
			      vals->dummy2, 0, 200, 1, 10, 0,
			      TRUE, 0, 0,
			      _("Dummy scale entry 2"), NULL);
  g_signal_connect (adj, "value_changed",
                    G_CALLBACK (gimp_int_adjustment_update),
                    &vals->dummy2);

  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
			      _("Dummy 3:"), SCALE_WIDTH, SPIN_BUTTON_WIDTH,
			      vals->dummy3, -100, 100, 1, 10, 0,
			      TRUE, 0, 0,
			      _("Dummy scale entry 3"), NULL);
  g_signal_connect (adj, "value_changed",
                    G_CALLBACK (gimp_int_adjustment_update),
                    &vals->dummy3);

  /*  gimp_random_seed_new() example  */

  frame = gimp_frame_new (_("A Random Seed Entry"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);
  hbox = gtk_hbox_new (FALSE, 6);
  gtk_container_add (GTK_CONTAINER (frame), hbox);
  gtk_widget_show (hbox);

  hbox2 = gimp_random_seed_new (&vals->seed, &vals->random_seed);
  gtk_widget_set_size_request (GTK_WIDGET (GIMP_RANDOM_SEED_SPINBUTTON (hbox2)),
                               RANDOM_SEED_WIDTH, -1);
  gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
  gtk_widget_show (hbox2);

  /*  gimp_coordinates_new() example  */

  frame = gimp_frame_new (_("A GimpCoordinates Widget\n"
			   "Initialized with the Drawable's Size"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  hbox = gtk_hbox_new (FALSE, 4);
  gtk_container_set_border_width (GTK_CONTAINER (hbox), 4);
  gtk_container_add (GTK_CONTAINER (frame), hbox);
  gtk_widget_show (hbox);

  unit = gimp_image_get_unit (image_ID);
  gimp_image_get_resolution (image_ID, &xres, &yres);

  coordinates = gimp_coordinates_new (unit, "%p", TRUE, TRUE, SPIN_BUTTON_WIDTH,
				      GIMP_SIZE_ENTRY_UPDATE_SIZE,

				      ui_vals->chain_active, TRUE,

				      _("Width:"), drawable->width, xres,
				      1, GIMP_MAX_IMAGE_SIZE,
				      0, drawable->width,

				      _("Height:"), drawable->height, yres,
				      1, GIMP_MAX_IMAGE_SIZE,
				      0, drawable->height);
  gtk_box_pack_start (GTK_BOX (hbox), coordinates, FALSE, FALSE, 0);
  gtk_widget_show (coordinates);

  /*  Image and drawable menus  */

  frame = gimp_frame_new (_("Image and Drawable Menu Examples"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  table = gtk_table_new (3, 2, FALSE);
  gtk_container_set_border_width (GTK_CONTAINER (table), 4);
  gtk_table_set_col_spacings (GTK_TABLE (table), 4);
  gtk_table_set_row_spacings (GTK_TABLE (table), 2);
  gtk_container_add (GTK_CONTAINER (frame), table);
  gtk_widget_show (table);

  row = 0;

  combo = gimp_layer_combo_box_new (NULL, NULL);
  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), drawable->drawable_id,
                              G_CALLBACK (gimp_int_combo_box_get_active),
                              &drawable_vals->drawable_id);

  gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
			     _("Layers:"), 0.0, 0.5, combo, 1, FALSE);

  combo = gimp_image_combo_box_new (dialog_image_constraint_func, NULL);
  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), image_ID,
                              G_CALLBACK (gimp_int_combo_box_get_active),
                              &image_vals->image_id);

  gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
			     _("RGB Images:"), 0.0, 0.5, combo, 1, FALSE);

  /*  Show the main containers  */

  gtk_widget_show (main_vbox);
  gtk_widget_show (dlg);

  run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);

  if (run)
    {
      /*  Save ui values  */
      ui_state->chain_active =
        gimp_chain_button_get_active (GIMP_COORDINATES_CHAINBUTTON (coordinates));
    }

  gtk_widget_destroy (dlg);

  return run;
#endif
}
Exemple #5
0
static gboolean
spread_dialog (gint32        image_ID,
               GimpDrawable *drawable)
{
  GtkWidget *dialog;
  GtkWidget *main_vbox;
  GtkWidget *preview;
  GtkWidget *frame;
  GtkWidget *size;
  GimpUnit   unit;
  gdouble    xres;
  gdouble    yres;
  gboolean   run;

  gimp_ui_init (PLUG_IN_BINARY, FALSE);

  dialog = gimp_dialog_new (_("Spread"), PLUG_IN_BINARY,
                            NULL, 0,
                            gimp_standard_help_func, PLUG_IN_PROC,

                            GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                            GTK_STOCK_OK,     GTK_RESPONSE_OK,

                            NULL);

  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
                                           GTK_RESPONSE_OK,
                                           GTK_RESPONSE_CANCEL,
                                           -1);

  gimp_window_set_transient (GTK_WINDOW (dialog));

  main_vbox = gtk_vbox_new (FALSE, 12);
  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
  gtk_widget_show (main_vbox);

  preview = gimp_drawable_preview_new (drawable, NULL);
  gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
  gtk_widget_show (preview);

  frame = gimp_frame_new (_("Spread Amount"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  /*  Get the image resolution and unit  */
  gimp_image_get_resolution (image_ID, &xres, &yres);
  unit = gimp_image_get_unit (image_ID);

  /* sizeentries */
  size = gimp_coordinates_new (unit, "%a", TRUE, FALSE, -1,
                               GIMP_SIZE_ENTRY_UPDATE_SIZE,

                               spvals.spread_amount_x == spvals.spread_amount_y,
                               FALSE,

                               _("_Horizontal:"), spvals.spread_amount_x, xres,
                               0, MAX (drawable->width, drawable->height),
                               0, 0,

                               _("_Vertical:"), spvals.spread_amount_y, yres,
                               0, MAX (drawable->width, drawable->height),
                               0, 0);
  gtk_container_add (GTK_CONTAINER (frame), size);
  gtk_widget_show (size);

  g_signal_connect (preview, "invalidated",
                    G_CALLBACK (spread_preview_update),
                    size);
  g_signal_connect_swapped (size, "value-changed",
                            G_CALLBACK (gimp_preview_invalidate),
                            preview);

  gtk_widget_show (dialog);

  spread_preview_update (GIMP_PREVIEW (preview), size);

  run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);

  if (run)
    {
      spvals.spread_amount_x =
        gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size), 0);
      spvals.spread_amount_y =
        gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size), 1);
    }

  gtk_widget_destroy (dialog);

  return run;
}
Exemple #6
0
/*
 * Create new CenterFrame, and return it (GtkFrame).
 */
static GtkWidget *
nova_center_create (GimpDrawable *drawable,
                    GimpPreview  *preview)
{
  NovaCenter *center;
  GtkWidget  *frame;
  GtkWidget  *hbox;
  GtkWidget  *check;
  gint32      image_ID;
  gdouble     res_x;
  gdouble     res_y;

  center = g_new0 (NovaCenter, 1);

  center->drawable = drawable;
  center->preview  = preview;

  frame = gimp_frame_new (_("Center of Nova"));

  g_signal_connect_swapped (frame, "destroy",
                            G_CALLBACK (g_free),
                            center);

  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
  gtk_container_add (GTK_CONTAINER (frame), hbox);
  gtk_widget_show (hbox);

  image_ID = gimp_item_get_image (drawable->drawable_id);
  gimp_image_get_resolution (image_ID, &res_x, &res_y);

  center->coords = gimp_coordinates_new (GIMP_UNIT_PIXEL, "%p", TRUE, TRUE, -1,
                                         GIMP_SIZE_ENTRY_UPDATE_SIZE,
                                         FALSE, FALSE,

                                         _("_X:"), pvals.xcenter, res_x,
                                         - (gdouble) drawable->width,
                                         2 * drawable->width,
                                         0, drawable->width,

                                         _("_Y:"), pvals.ycenter, res_y,
                                         - (gdouble) drawable->height,
                                         2 * drawable->height,
                                         0, drawable->height);

  gtk_table_set_row_spacing (GTK_TABLE (center->coords), 1, 6);
  gtk_box_pack_start (GTK_BOX (hbox), center->coords, FALSE, FALSE, 0);
  gtk_widget_show (center->coords);

  g_signal_connect (center->coords, "value-changed",
                    G_CALLBACK (nova_center_coords_update),
                    center);
  g_signal_connect (center->coords, "refval-changed",
                    G_CALLBACK (nova_center_coords_update),
                    center);

  check = gtk_check_button_new_with_mnemonic (_("Show _position"));
  gtk_table_attach (GTK_TABLE (center->coords), check, 0, 5, 2, 3,
                    GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), show_cursor);
  gtk_widget_show (check);

  g_signal_connect (check, "toggled",
                    G_CALLBACK (gimp_toggle_button_update),
                    &show_cursor);
  g_signal_connect_swapped (check, "toggled",
                            G_CALLBACK (gtk_widget_queue_draw),
                            preview->area);

  g_signal_connect (preview->area, "realize",
                    G_CALLBACK (nova_center_preview_realize),
                    center);
  g_signal_connect_after (preview->area, "expose-event",
                          G_CALLBACK (nova_center_preview_expose),
                          center);
  g_signal_connect (preview->area, "event",
                    G_CALLBACK (nova_center_preview_events),
                    center);

  return frame;
}
/**
 * resolution_calibrate_dialog:
 * @resolution_entry: a #GimpSizeEntry to connect the dialog to
 * @pixbuf:           an optional #GdkPixbuf for the upper left corner
 *
 * Displays a dialog that allows the user to interactively determine
 * her monitor resolution. This dialog runs it's own GTK main loop and
 * is connected to a #GimpSizeEntry handling the resolution to be set.
 **/
void
resolution_calibrate_dialog (GtkWidget *resolution_entry,
                             GdkPixbuf *pixbuf)
{
  GtkWidget    *dialog;
  GtkWidget    *table;
  GtkWidget    *vbox;
  GtkWidget    *hbox;
  GtkWidget    *ruler;
  GtkWidget    *label;
  GdkScreen    *screen;
  GdkRectangle  rect;
  gint          monitor;

  g_return_if_fail (GIMP_IS_SIZE_ENTRY (resolution_entry));
  g_return_if_fail (GTK_WIDGET_REALIZED (resolution_entry));
  g_return_if_fail (pixbuf == NULL || GDK_IS_PIXBUF (pixbuf));

  /*  this dialog can only exist once  */
  if (calibrate_entry)
    return;

  dialog = gimp_dialog_new (_("Calibrate Monitor Resolution"),
                            "gimp-resolution-calibration",
                            gtk_widget_get_toplevel (resolution_entry),
                            GTK_DIALOG_DESTROY_WITH_PARENT,
                            NULL, NULL,

                            GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                            GTK_STOCK_OK,     GTK_RESPONSE_OK,

                            NULL);

  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
                                           GTK_RESPONSE_OK,
                                           GTK_RESPONSE_CANCEL,
                                           -1);

  screen = gtk_widget_get_screen (dialog);
  monitor = gdk_screen_get_monitor_at_window (screen,
                                              resolution_entry->window);
  gdk_screen_get_monitor_geometry (screen, monitor, &rect);

  ruler_width  = rect.width  - 300 - (rect.width  % 100);
  ruler_height = rect.height - 300 - (rect.height % 100);

  table = gtk_table_new (4, 4, FALSE);
  gtk_container_set_border_width (GTK_CONTAINER (table), 12);
  gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), table);
  gtk_widget_show (table);

  if (pixbuf)
    {
      GtkWidget *image = gtk_image_new_from_pixbuf (pixbuf);

      gtk_table_attach (GTK_TABLE (table), image, 0, 1, 0, 1,
                        GTK_SHRINK, GTK_SHRINK, 4, 4);
      gtk_widget_show (image);
    }

  ruler = gimp_ruler_new (GTK_ORIENTATION_HORIZONTAL);
  gtk_widget_set_size_request (ruler, ruler_width, 32);
  gimp_ruler_set_range (GIMP_RULER (ruler), 0, ruler_width, ruler_width);
  gtk_table_attach (GTK_TABLE (table), ruler, 1, 3, 0, 1,
                    GTK_SHRINK, GTK_SHRINK, 0, 0);
  gtk_widget_show (ruler);

  ruler = gimp_ruler_new (GTK_ORIENTATION_VERTICAL);
  gtk_widget_set_size_request (ruler, 32, ruler_height);
  gimp_ruler_set_range (GIMP_RULER (ruler), 0, ruler_height, ruler_height);
  gtk_table_attach (GTK_TABLE (table), ruler, 0, 1, 1, 3,
                    GTK_SHRINK, GTK_SHRINK, 0, 0);
  gtk_widget_show (ruler);

  vbox = gtk_vbox_new (FALSE, 12);
  gtk_table_attach (GTK_TABLE (table), vbox, 1, 2, 1, 2,
                    GTK_SHRINK, GTK_SHRINK, 0, 0);
  gtk_widget_show (vbox);

  label =
    gtk_label_new (_("Measure the rulers and enter their lengths:"));
  gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
  gimp_label_set_attributes (GTK_LABEL (label),
                             PANGO_ATTR_SCALE,  PANGO_SCALE_LARGE,
                             PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
                             -1);
  gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
  gtk_widget_show (label);

  hbox = gtk_hbox_new (FALSE, 0);
  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
  gtk_widget_show (hbox);

  calibrate_xres =
    gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (resolution_entry), 0);
  calibrate_yres =
    gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (resolution_entry), 1);

  calibrate_entry =
    gimp_coordinates_new  (GIMP_UNIT_INCH, "%p",
                           FALSE, FALSE, 10,
                           GIMP_SIZE_ENTRY_UPDATE_SIZE,
                           FALSE,
                           FALSE,
                           _("_Horizontal:"),
                           ruler_width,
                           calibrate_xres,
                           1, GIMP_MAX_IMAGE_SIZE,
                           0, 0,
                           _("_Vertical:"),
                           ruler_height,
                           calibrate_yres,
                           1, GIMP_MAX_IMAGE_SIZE,
                           0, 0);
  gtk_widget_hide (GTK_WIDGET (GIMP_COORDINATES_CHAINBUTTON (calibrate_entry)));
  g_signal_connect (dialog, "destroy",
                    G_CALLBACK (gtk_widget_destroyed),
                    &calibrate_entry);

  gtk_box_pack_end (GTK_BOX (hbox), calibrate_entry, FALSE, FALSE, 0);
  gtk_widget_show (calibrate_entry);

  gtk_widget_show (dialog);

  switch (gimp_dialog_run (GIMP_DIALOG (dialog)))
    {
    case GTK_RESPONSE_OK:
      {
        GtkWidget *chain_button;
        gdouble    x, y;

        x = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (calibrate_entry), 0);
        y = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (calibrate_entry), 1);

        calibrate_xres = (gdouble) ruler_width  * calibrate_xres / x;
        calibrate_yres = (gdouble) ruler_height * calibrate_yres / y;

        chain_button = GIMP_COORDINATES_CHAINBUTTON (resolution_entry);

        if (ABS (x - y) > GIMP_MIN_RESOLUTION)
          gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain_button),
                                        FALSE);

        gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (resolution_entry),
                                    0, calibrate_xres);
        gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (resolution_entry),
                                    1, calibrate_yres);
      }

    default:
      break;
    }

  gtk_widget_destroy (dialog);
}