Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1239 insertions, 0 deletions

diff --git a/app/display/gimpdisplayshell-handlers.c b/app/display/gimpdisplayshell-handlers.c
new file mode 100644
index 0000000..7680467
--- /dev/null
+++ b/app/display/gimpdisplayshell-handlers.c
@@ -0,0 +1,1239 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "display-types.h"
+
+#include "config/gimpdisplayoptions.h"
+#include "config/gimpguiconfig.h"
+
+#include "core/gimp.h"
+#include "core/gimp-cairo.h"
+#include "core/gimpguide.h"
+#include "core/gimpimage.h"
+#include "core/gimpimage-grid.h"
+#include "core/gimpimage-guides.h"
+#include "core/gimpimage-quick-mask.h"
+#include "core/gimpimage-sample-points.h"
+#include "core/gimpitem.h"
+#include "core/gimpitemstack.h"
+#include "core/gimpsamplepoint.h"
+#include "core/gimptreehandler.h"
+
+#include "vectors/gimpvectors.h"
+
+#include "widgets/gimpwidgets-utils.h"
+
+#include "gimpcanvascanvasboundary.h"
+#include "gimpcanvasguide.h"
+#include "gimpcanvaslayerboundary.h"
+#include "gimpcanvaspath.h"
+#include "gimpcanvasproxygroup.h"
+#include "gimpcanvassamplepoint.h"
+#include "gimpdisplay.h"
+#include "gimpdisplayshell.h"
+#include "gimpdisplayshell-appearance.h"
+#include "gimpdisplayshell-callbacks.h"
+#include "gimpdisplayshell-expose.h"
+#include "gimpdisplayshell-handlers.h"
+#include "gimpdisplayshell-icon.h"
+#include "gimpdisplayshell-profile.h"
+#include "gimpdisplayshell-rulers.h"
+#include "gimpdisplayshell-scale.h"
+#include "gimpdisplayshell-scroll.h"
+#include "gimpdisplayshell-selection.h"
+#include "gimpdisplayshell-title.h"
+#include "gimpimagewindow.h"
+#include "gimpstatusbar.h"
+
+#include "gimp-intl.h"
+
+
+/*  local function prototypes  */
+
+static void   gimp_display_shell_clean_dirty_handler        (GimpImage        *image,
+                                                             GimpDirtyMask     dirty_mask,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_undo_event_handler         (GimpImage        *image,
+                                                             GimpUndoEvent     event,
+                                                             GimpUndo         *undo,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_grid_notify_handler        (GimpGrid         *grid,
+                                                             GParamSpec       *pspec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_name_changed_handler       (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_selection_invalidate_handler
+                                                            (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_component_visibility_changed_handler
+                                                            (GimpImage        *image,
+                                                             GimpChannelType   channel,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_size_changed_detailed_handler
+                                                            (GimpImage        *image,
+                                                             gint              previous_origin_x,
+                                                             gint              previous_origin_y,
+                                                             gint              previous_width,
+                                                             gint              previous_height,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_resolution_changed_handler (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_quick_mask_changed_handler (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_guide_add_handler          (GimpImage        *image,
+                                                             GimpGuide        *guide,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_guide_remove_handler       (GimpImage        *image,
+                                                             GimpGuide        *guide,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_guide_move_handler         (GimpImage        *image,
+                                                             GimpGuide        *guide,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_sample_point_add_handler   (GimpImage        *image,
+                                                             GimpSamplePoint  *sample_point,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_sample_point_remove_handler(GimpImage        *image,
+                                                             GimpSamplePoint  *sample_point,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_sample_point_move_handler  (GimpImage        *image,
+                                                             GimpSamplePoint  *sample_point,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_invalidate_preview_handler (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_mode_changed_handler       (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_precision_changed_handler  (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_profile_changed_handler    (GimpColorManaged *image,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_saved_handler              (GimpImage        *image,
+                                                             GFile            *file,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_exported_handler           (GimpImage        *image,
+                                                             GFile            *file,
+                                                             GimpDisplayShell *shell);
+
+static void   gimp_display_shell_active_vectors_handler     (GimpImage        *image,
+                                                             GimpDisplayShell *shell);
+
+static void   gimp_display_shell_vectors_freeze_handler     (GimpVectors      *vectors,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_vectors_thaw_handler       (GimpVectors      *vectors,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_vectors_visible_handler    (GimpVectors      *vectors,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_vectors_add_handler        (GimpContainer    *container,
+                                                             GimpVectors      *vectors,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_vectors_remove_handler     (GimpContainer    *container,
+                                                             GimpVectors      *vectors,
+                                                             GimpDisplayShell *shell);
+
+static void   gimp_display_shell_check_notify_handler       (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_title_notify_handler       (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_nav_size_notify_handler    (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_monitor_res_notify_handler (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_padding_notify_handler     (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_ants_speed_notify_handler  (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void   gimp_display_shell_quality_notify_handler     (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void  gimp_display_shell_color_config_notify_handler (GObject          *config,
+                                                             GParamSpec       *param_spec,
+                                                             GimpDisplayShell *shell);
+static void  gimp_display_shell_display_changed_handler     (GimpContext      *context,
+                                                             GimpDisplay      *display,
+                                                             GimpDisplayShell *shell);
+
+
+/*  public functions  */
+
+void
+gimp_display_shell_connect (GimpDisplayShell *shell)
+{
+  GimpImage         *image;
+  GimpContainer     *vectors;
+  GimpDisplayConfig *config;
+  GimpColorConfig   *color_config;
+  GimpContext       *user_context;
+  GList             *list;
+
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+  g_return_if_fail (GIMP_IS_DISPLAY (shell->display));
+
+  image = gimp_display_get_image (shell->display);
+
+  g_return_if_fail (GIMP_IS_IMAGE (image));
+
+  vectors = gimp_image_get_vectors (image);
+
+  config       = shell->display->config;
+  color_config = GIMP_CORE_CONFIG (config)->color_management;
+
+  user_context = gimp_get_user_context (shell->display->gimp);
+
+  g_signal_connect (image, "clean",
+                    G_CALLBACK (gimp_display_shell_clean_dirty_handler),
+                    shell);
+  g_signal_connect (image, "dirty",
+                    G_CALLBACK (gimp_display_shell_clean_dirty_handler),
+                    shell);
+  g_signal_connect (image, "undo-event",
+                    G_CALLBACK (gimp_display_shell_undo_event_handler),
+                    shell);
+
+  g_signal_connect (gimp_image_get_grid (image), "notify",
+                    G_CALLBACK (gimp_display_shell_grid_notify_handler),
+                    shell);
+  g_object_set (shell->grid, "grid", gimp_image_get_grid (image), NULL);
+
+  g_signal_connect (image, "name-changed",
+                    G_CALLBACK (gimp_display_shell_name_changed_handler),
+                    shell);
+  g_signal_connect (image, "selection-invalidate",
+                    G_CALLBACK (gimp_display_shell_selection_invalidate_handler),
+                    shell);
+  g_signal_connect (image, "component-visibility-changed",
+                    G_CALLBACK (gimp_display_shell_component_visibility_changed_handler),
+                    shell);
+  g_signal_connect (image, "size-changed-detailed",
+                    G_CALLBACK (gimp_display_shell_size_changed_detailed_handler),
+                    shell);
+  g_signal_connect (image, "resolution-changed",
+                    G_CALLBACK (gimp_display_shell_resolution_changed_handler),
+                    shell);
+  g_signal_connect (image, "quick-mask-changed",
+                    G_CALLBACK (gimp_display_shell_quick_mask_changed_handler),
+                    shell);
+
+  g_signal_connect (image, "guide-added",
+                    G_CALLBACK (gimp_display_shell_guide_add_handler),
+                    shell);
+  g_signal_connect (image, "guide-removed",
+                    G_CALLBACK (gimp_display_shell_guide_remove_handler),
+                    shell);
+  g_signal_connect (image, "guide-moved",
+                    G_CALLBACK (gimp_display_shell_guide_move_handler),
+                    shell);
+  for (list = gimp_image_get_guides (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_display_shell_guide_add_handler (image, list->data, shell);
+    }
+
+  g_signal_connect (image, "sample-point-added",
+                    G_CALLBACK (gimp_display_shell_sample_point_add_handler),
+                    shell);
+  g_signal_connect (image, "sample-point-removed",
+                    G_CALLBACK (gimp_display_shell_sample_point_remove_handler),
+                    shell);
+  g_signal_connect (image, "sample-point-moved",
+                    G_CALLBACK (gimp_display_shell_sample_point_move_handler),
+                    shell);
+  for (list = gimp_image_get_sample_points (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_display_shell_sample_point_add_handler (image, list->data, shell);
+    }
+
+  g_signal_connect (image, "invalidate-preview",
+                    G_CALLBACK (gimp_display_shell_invalidate_preview_handler),
+                    shell);
+  g_signal_connect (image, "mode-changed",
+                    G_CALLBACK (gimp_display_shell_mode_changed_handler),
+                    shell);
+  g_signal_connect (image, "precision-changed",
+                    G_CALLBACK (gimp_display_shell_precision_changed_handler),
+                    shell);
+  g_signal_connect (image, "profile-changed",
+                    G_CALLBACK (gimp_display_shell_profile_changed_handler),
+                    shell);
+  g_signal_connect (image, "saved",
+                    G_CALLBACK (gimp_display_shell_saved_handler),
+                    shell);
+  g_signal_connect (image, "exported",
+                    G_CALLBACK (gimp_display_shell_exported_handler),
+                    shell);
+
+  g_signal_connect (image, "active-vectors-changed",
+                    G_CALLBACK (gimp_display_shell_active_vectors_handler),
+                    shell);
+
+  shell->vectors_freeze_handler =
+    gimp_tree_handler_connect (vectors, "freeze",
+                               G_CALLBACK (gimp_display_shell_vectors_freeze_handler),
+                               shell);
+  shell->vectors_thaw_handler =
+    gimp_tree_handler_connect (vectors, "thaw",
+                               G_CALLBACK (gimp_display_shell_vectors_thaw_handler),
+                               shell);
+  shell->vectors_visible_handler =
+    gimp_tree_handler_connect (vectors, "visibility-changed",
+                               G_CALLBACK (gimp_display_shell_vectors_visible_handler),
+                               shell);
+
+  g_signal_connect (vectors, "add",
+                    G_CALLBACK (gimp_display_shell_vectors_add_handler),
+                    shell);
+  g_signal_connect (vectors, "remove",
+                    G_CALLBACK (gimp_display_shell_vectors_remove_handler),
+                    shell);
+  for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (vectors));
+       list;
+       list = g_list_next (list))
+    {
+      gimp_display_shell_vectors_add_handler (vectors, list->data, shell);
+    }
+
+  g_signal_connect (config,
+                    "notify::transparency-size",
+                    G_CALLBACK (gimp_display_shell_check_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::transparency-type",
+                    G_CALLBACK (gimp_display_shell_check_notify_handler),
+                    shell);
+
+  g_signal_connect (config,
+                    "notify::image-title-format",
+                    G_CALLBACK (gimp_display_shell_title_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::image-status-format",
+                    G_CALLBACK (gimp_display_shell_title_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::navigation-preview-size",
+                    G_CALLBACK (gimp_display_shell_nav_size_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::monitor-resolution-from-windowing-system",
+                    G_CALLBACK (gimp_display_shell_monitor_res_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::monitor-xresolution",
+                    G_CALLBACK (gimp_display_shell_monitor_res_notify_handler),
+                    shell);
+  g_signal_connect (config,
+                    "notify::monitor-yresolution",
+                    G_CALLBACK (gimp_display_shell_monitor_res_notify_handler),
+                    shell);
+
+  g_signal_connect (config->default_view,
+                    "notify::padding-mode",
+                    G_CALLBACK (gimp_display_shell_padding_notify_handler),
+                    shell);
+  g_signal_connect (config->default_view,
+                    "notify::padding-color",
+                    G_CALLBACK (gimp_display_shell_padding_notify_handler),
+                    shell);
+  g_signal_connect (config->default_fullscreen_view,
+                    "notify::padding-mode",
+                    G_CALLBACK (gimp_display_shell_padding_notify_handler),
+                    shell);
+  g_signal_connect (config->default_fullscreen_view,
+                    "notify::padding-color",
+                    G_CALLBACK (gimp_display_shell_padding_notify_handler),
+                    shell);
+
+  g_signal_connect (config,
+                    "notify::marching-ants-speed",
+                    G_CALLBACK (gimp_display_shell_ants_speed_notify_handler),
+                    shell);
+
+  g_signal_connect (config,
+                    "notify::zoom-quality",
+                    G_CALLBACK (gimp_display_shell_quality_notify_handler),
+                    shell);
+
+  g_signal_connect (color_config, "notify",
+                    G_CALLBACK (gimp_display_shell_color_config_notify_handler),
+                    shell);
+
+  g_signal_connect (user_context, "display-changed",
+                    G_CALLBACK (gimp_display_shell_display_changed_handler),
+                    shell);
+
+  gimp_display_shell_active_vectors_handler     (image, shell);
+  gimp_display_shell_invalidate_preview_handler (image, shell);
+  gimp_display_shell_quick_mask_changed_handler (image, shell);
+  gimp_display_shell_profile_changed_handler    (GIMP_COLOR_MANAGED (image),
+                                                 shell);
+  gimp_display_shell_color_config_notify_handler (G_OBJECT (color_config),
+                                                  NULL, /* sync all */
+                                                  shell);
+
+  gimp_canvas_layer_boundary_set_layer (GIMP_CANVAS_LAYER_BOUNDARY (shell->layer_boundary),
+                                        gimp_image_get_active_layer (image));
+
+  gimp_canvas_canvas_boundary_set_image (GIMP_CANVAS_CANVAS_BOUNDARY (shell->canvas_boundary),
+                                         image);
+
+  if (shell->show_all)
+    {
+      gimp_image_inc_show_all_count (image);
+
+      gimp_image_flush (image);
+    }
+}
+
+void
+gimp_display_shell_disconnect (GimpDisplayShell *shell)
+{
+  GimpImage         *image;
+  GimpContainer     *vectors;
+  GimpDisplayConfig *config;
+  GimpColorConfig   *color_config;
+  GimpContext       *user_context;
+  GList             *list;
+
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+  g_return_if_fail (GIMP_IS_DISPLAY (shell->display));
+
+  image = gimp_display_get_image (shell->display);
+
+  g_return_if_fail (GIMP_IS_IMAGE (image));
+
+  vectors = gimp_image_get_vectors (image);
+
+  config       = shell->display->config;
+  color_config = GIMP_CORE_CONFIG (config)->color_management;
+
+  user_context = gimp_get_user_context (shell->display->gimp);
+
+  gimp_display_shell_icon_update_stop (shell);
+
+  gimp_canvas_layer_boundary_set_layer (GIMP_CANVAS_LAYER_BOUNDARY (shell->layer_boundary),
+                                        NULL);
+
+  gimp_canvas_canvas_boundary_set_image (GIMP_CANVAS_CANVAS_BOUNDARY (shell->canvas_boundary),
+                                         NULL);
+
+  g_signal_handlers_disconnect_by_func (user_context,
+                                        gimp_display_shell_display_changed_handler,
+                                        shell);
+
+  g_signal_handlers_disconnect_by_func (color_config,
+                                        gimp_display_shell_color_config_notify_handler,
+                                        shell);
+  shell->color_config_set = FALSE;
+
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_quality_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_ants_speed_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config->default_fullscreen_view,
+                                        gimp_display_shell_padding_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config->default_view,
+                                        gimp_display_shell_padding_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_monitor_res_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_nav_size_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_title_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (config,
+                                        gimp_display_shell_check_notify_handler,
+                                        shell);
+
+  g_signal_handlers_disconnect_by_func (vectors,
+                                        gimp_display_shell_vectors_remove_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (vectors,
+                                        gimp_display_shell_vectors_add_handler,
+                                        shell);
+
+  gimp_tree_handler_disconnect (shell->vectors_visible_handler);
+  shell->vectors_visible_handler = NULL;
+
+  gimp_tree_handler_disconnect (shell->vectors_thaw_handler);
+  shell->vectors_thaw_handler = NULL;
+
+  gimp_tree_handler_disconnect (shell->vectors_freeze_handler);
+  shell->vectors_freeze_handler = NULL;
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_active_vectors_handler,
+                                        shell);
+
+  for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (vectors));
+       list;
+       list = g_list_next (list))
+    {
+      gimp_canvas_proxy_group_remove_item (GIMP_CANVAS_PROXY_GROUP (shell->vectors),
+                                           list->data);
+    }
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_exported_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_saved_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_profile_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_precision_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_mode_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_invalidate_preview_handler,
+                                        shell);
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_guide_add_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_guide_remove_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_guide_move_handler,
+                                        shell);
+  for (list = gimp_image_get_guides (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_canvas_proxy_group_remove_item (GIMP_CANVAS_PROXY_GROUP (shell->guides),
+                                           list->data);
+    }
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_sample_point_add_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_sample_point_remove_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_sample_point_move_handler,
+                                        shell);
+  for (list = gimp_image_get_sample_points (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_canvas_proxy_group_remove_item (GIMP_CANVAS_PROXY_GROUP (shell->sample_points),
+                                           list->data);
+    }
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_quick_mask_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_resolution_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_component_visibility_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_size_changed_detailed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_selection_invalidate_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_name_changed_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (gimp_image_get_grid (image),
+                                        gimp_display_shell_grid_notify_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_undo_event_handler,
+                                        shell);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_shell_clean_dirty_handler,
+                                        shell);
+
+  if (shell->show_all)
+    {
+      gimp_image_dec_show_all_count (image);
+
+      gimp_image_flush (image);
+    }
+}
+
+
+/*  private functions  */
+
+static void
+gimp_display_shell_clean_dirty_handler (GimpImage        *image,
+                                        GimpDirtyMask     dirty_mask,
+                                        GimpDisplayShell *shell)
+{
+  gimp_display_shell_title_update (shell);
+}
+
+static void
+gimp_display_shell_undo_event_handler (GimpImage        *image,
+                                       GimpUndoEvent     event,
+                                       GimpUndo         *undo,
+                                       GimpDisplayShell *shell)
+{
+  gimp_display_shell_title_update (shell);
+}
+
+static void
+gimp_display_shell_grid_notify_handler (GimpGrid         *grid,
+                                        GParamSpec       *pspec,
+                                        GimpDisplayShell *shell)
+{
+  g_object_set (shell->grid, "grid", grid, NULL);
+}
+
+static void
+gimp_display_shell_name_changed_handler (GimpImage        *image,
+                                         GimpDisplayShell *shell)
+{
+  gimp_display_shell_title_update (shell);
+}
+
+static void
+gimp_display_shell_selection_invalidate_handler (GimpImage        *image,
+                                                 GimpDisplayShell *shell)
+{
+  gimp_display_shell_selection_undraw (shell);
+}
+
+static void
+gimp_display_shell_resolution_changed_handler (GimpImage        *image,
+                                               GimpDisplayShell *shell)
+{
+  gimp_display_shell_scale_update (shell);
+
+  if (shell->dot_for_dot)
+    {
+      if (shell->unit != GIMP_UNIT_PIXEL)
+        {
+          gimp_display_shell_rulers_update (shell);
+        }
+
+      gimp_display_shell_scaled (shell);
+    }
+  else
+    {
+      /* A resolution change has the same effect as a size change from
+       * a display shell point of view. Force a redraw of the display
+       * so that we don't get any display garbage.
+       */
+
+      GimpDisplayConfig *config = shell->display->config;
+      gboolean           resize_window;
+
+      /* Resize windows only in multi-window mode */
+      resize_window = (config->resize_windows_on_resize &&
+                       ! GIMP_GUI_CONFIG (config)->single_window_mode);
+
+      gimp_display_shell_scale_resize (shell, resize_window, FALSE);
+    }
+}
+
+static void
+gimp_display_shell_quick_mask_changed_handler (GimpImage        *image,
+                                               GimpDisplayShell *shell)
+{
+  GtkImage *gtk_image;
+  gboolean  quick_mask_state;
+
+  gtk_image = GTK_IMAGE (gtk_bin_get_child (GTK_BIN (shell->quick_mask_button)));
+
+  g_signal_handlers_block_by_func (shell->quick_mask_button,
+                                   gimp_display_shell_quick_mask_toggled,
+                                   shell);
+
+  quick_mask_state = gimp_image_get_quick_mask_state (image);
+
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (shell->quick_mask_button),
+                                quick_mask_state);
+
+  if (quick_mask_state)
+    gtk_image_set_from_icon_name (gtk_image, GIMP_ICON_QUICK_MASK_ON,
+                                  GTK_ICON_SIZE_MENU);
+  else
+    gtk_image_set_from_icon_name (gtk_image, GIMP_ICON_QUICK_MASK_OFF,
+                                  GTK_ICON_SIZE_MENU);
+
+  g_signal_handlers_unblock_by_func (shell->quick_mask_button,
+                                     gimp_display_shell_quick_mask_toggled,
+                                     shell);
+}
+
+static void
+gimp_display_shell_guide_add_handler (GimpImage        *image,
+                                      GimpGuide        *guide,
+                                      GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->guides);
+  GimpCanvasItem       *item;
+  GimpGuideStyle        style;
+
+  style = gimp_guide_get_style (guide);
+  item = gimp_canvas_guide_new (shell,
+                                gimp_guide_get_orientation (guide),
+                                gimp_guide_get_position (guide),
+                                style);
+
+  gimp_canvas_proxy_group_add_item (group, guide, item);
+  g_object_unref (item);
+}
+
+static void
+gimp_display_shell_guide_remove_handler (GimpImage        *image,
+                                         GimpGuide        *guide,
+                                         GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->guides);
+
+  gimp_canvas_proxy_group_remove_item (group, guide);
+}
+
+static void
+gimp_display_shell_guide_move_handler (GimpImage        *image,
+                                       GimpGuide        *guide,
+                                       GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->guides);
+  GimpCanvasItem       *item;
+
+  item = gimp_canvas_proxy_group_get_item (group, guide);
+
+  gimp_canvas_guide_set (item,
+                         gimp_guide_get_orientation (guide),
+                         gimp_guide_get_position (guide));
+}
+
+static void
+gimp_display_shell_sample_point_add_handler (GimpImage        *image,
+                                             GimpSamplePoint  *sample_point,
+                                             GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->sample_points);
+  GimpCanvasItem       *item;
+  GList                *list;
+  gint                  x;
+  gint                  y;
+  gint                  i;
+
+  gimp_sample_point_get_position (sample_point, &x, &y);
+
+  item = gimp_canvas_sample_point_new (shell, x, y, 0, TRUE);
+
+  gimp_canvas_proxy_group_add_item (group, sample_point, item);
+  g_object_unref (item);
+
+  for (list = gimp_image_get_sample_points (image), i = 1;
+       list;
+       list = g_list_next (list), i++)
+    {
+      GimpSamplePoint *sample_point = list->data;
+
+      item = gimp_canvas_proxy_group_get_item (group, sample_point);
+
+      if (item)
+        g_object_set (item,
+                      "index", i,
+                      NULL);
+    }
+}
+
+static void
+gimp_display_shell_sample_point_remove_handler (GimpImage        *image,
+                                                GimpSamplePoint  *sample_point,
+                                                GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->sample_points);
+  GList                *list;
+  gint                  i;
+
+  gimp_canvas_proxy_group_remove_item (group, sample_point);
+
+  for (list = gimp_image_get_sample_points (image), i = 1;
+       list;
+       list = g_list_next (list), i++)
+    {
+      GimpSamplePoint *sample_point = list->data;
+      GimpCanvasItem  *item;
+
+      item = gimp_canvas_proxy_group_get_item (group, sample_point);
+
+      if (item)
+        g_object_set (item,
+                      "index", i,
+                      NULL);
+    }
+}
+
+static void
+gimp_display_shell_sample_point_move_handler (GimpImage        *image,
+                                              GimpSamplePoint  *sample_point,
+                                              GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->sample_points);
+  GimpCanvasItem       *item;
+  gint                  x;
+  gint                  y;
+
+  item = gimp_canvas_proxy_group_get_item (group, sample_point);
+
+  gimp_sample_point_get_position (sample_point, &x, &y);
+
+  gimp_canvas_sample_point_set (item, x, y);
+}
+
+static void
+gimp_display_shell_component_visibility_changed_handler (GimpImage        *image,
+                                                         GimpChannelType   channel,
+                                                         GimpDisplayShell *shell)
+{
+  if (channel == GIMP_CHANNEL_ALPHA && shell->show_all)
+    gimp_display_shell_expose_full (shell);
+}
+
+static void
+gimp_display_shell_size_changed_detailed_handler (GimpImage        *image,
+                                                  gint              previous_origin_x,
+                                                  gint              previous_origin_y,
+                                                  gint              previous_width,
+                                                  gint              previous_height,
+                                                  GimpDisplayShell *shell)
+{
+  GimpDisplayConfig *config = shell->display->config;
+  gboolean           resize_window;
+
+  /* Resize windows only in multi-window mode */
+  resize_window = (config->resize_windows_on_resize &&
+                   ! GIMP_GUI_CONFIG (config)->single_window_mode);
+
+  if (resize_window)
+    {
+      GimpImageWindow *window = gimp_display_shell_get_window (shell);
+
+      if (window && gimp_image_window_get_active_shell (window) == shell)
+        {
+          /* If the window is resized just center the image in it when it
+           * has change size
+           */
+          gimp_image_window_shrink_wrap (window, FALSE);
+        }
+    }
+  else
+    {
+      GimpImage *image      = gimp_display_get_image (shell->display);
+      gint       new_width  = gimp_image_get_width  (image);
+      gint       new_height = gimp_image_get_height (image);
+      gint       scaled_previous_origin_x;
+      gint       scaled_previous_origin_y;
+      gboolean   horizontally;
+      gboolean   vertically;
+
+      scaled_previous_origin_x = SCALEX (shell, previous_origin_x);
+      scaled_previous_origin_y = SCALEY (shell, previous_origin_y);
+
+      horizontally = (SCALEX (shell, previous_width)  >  shell->disp_width  &&
+                      SCALEX (shell, new_width)       <= shell->disp_width);
+      vertically   = (SCALEY (shell, previous_height) >  shell->disp_height &&
+                      SCALEY (shell, new_height)      <= shell->disp_height);
+
+      gimp_display_shell_scroll_set_offset (shell,
+                                            shell->offset_x + scaled_previous_origin_x,
+                                            shell->offset_y + scaled_previous_origin_y);
+
+      if (! gimp_display_shell_get_infinite_canvas (shell))
+        {
+          gimp_display_shell_scroll_center_image (shell,
+                                                  horizontally, vertically);
+        }
+
+      /* The above calls might not lead to a call to
+       * gimp_display_shell_scroll_clamp_and_update() and
+       * gimp_display_shell_expose_full() in all cases because when
+       * scaling the old and new scroll offset might be the same.
+       *
+       * We need them to be called in all cases, so simply call them
+       * explicitly here at the end
+       */
+      gimp_display_shell_scroll_clamp_and_update (shell);
+
+      gimp_display_shell_expose_full (shell);
+    }
+}
+
+static void
+gimp_display_shell_invalidate_preview_handler (GimpImage        *image,
+                                               GimpDisplayShell *shell)
+{
+  gimp_display_shell_icon_update (shell);
+}
+
+static void
+gimp_display_shell_mode_changed_handler (GimpImage        *image,
+                                         GimpDisplayShell *shell)
+{
+  gimp_display_shell_profile_update (shell);
+}
+
+static void
+gimp_display_shell_precision_changed_handler (GimpImage        *image,
+                                              GimpDisplayShell *shell)
+{
+  gimp_display_shell_profile_update (shell);
+}
+
+static void
+gimp_display_shell_profile_changed_handler (GimpColorManaged *image,
+                                            GimpDisplayShell *shell)
+{
+  gimp_color_managed_profile_changed (GIMP_COLOR_MANAGED (shell));
+}
+
+static void
+gimp_display_shell_saved_handler (GimpImage        *image,
+                                  GFile            *file,
+                                  GimpDisplayShell *shell)
+{
+  GimpStatusbar *statusbar = gimp_display_shell_get_statusbar (shell);
+
+  gimp_statusbar_push_temp (statusbar, GIMP_MESSAGE_INFO,
+                            GIMP_ICON_DOCUMENT_SAVE,
+                            _("Image saved to '%s'"),
+                            gimp_file_get_utf8_name (file));
+}
+
+static void
+gimp_display_shell_exported_handler (GimpImage        *image,
+                                     GFile            *file,
+                                     GimpDisplayShell *shell)
+{
+  GimpStatusbar *statusbar = gimp_display_shell_get_statusbar (shell);
+
+  gimp_statusbar_push_temp (statusbar, GIMP_MESSAGE_INFO,
+                            GIMP_ICON_DOCUMENT_SAVE,
+                            _("Image exported to '%s'"),
+                            gimp_file_get_utf8_name (file));
+}
+
+static void
+gimp_display_shell_active_vectors_handler (GimpImage        *image,
+                                           GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group  = GIMP_CANVAS_PROXY_GROUP (shell->vectors);
+  GimpVectors          *active = gimp_image_get_active_vectors (image);
+  GList                *list;
+
+  for (list = gimp_image_get_vectors_iter (image);
+       list;
+       list = g_list_next (list))
+    {
+      GimpVectors    *vectors = list->data;
+      GimpCanvasItem *item;
+
+      item = gimp_canvas_proxy_group_get_item (group, vectors);
+
+      gimp_canvas_item_set_highlight (item, vectors == active);
+    }
+}
+
+static void
+gimp_display_shell_vectors_freeze_handler (GimpVectors      *vectors,
+                                           GimpDisplayShell *shell)
+{
+  /* do nothing */
+}
+
+static void
+gimp_display_shell_vectors_thaw_handler (GimpVectors      *vectors,
+                                         GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->vectors);
+  GimpCanvasItem       *item;
+
+  item = gimp_canvas_proxy_group_get_item (group, vectors);
+
+  gimp_canvas_path_set (item, gimp_vectors_get_bezier (vectors));
+}
+
+static void
+gimp_display_shell_vectors_visible_handler (GimpVectors      *vectors,
+                                            GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->vectors);
+  GimpCanvasItem       *item;
+
+  item = gimp_canvas_proxy_group_get_item (group, vectors);
+
+  gimp_canvas_item_set_visible (item,
+                                gimp_item_get_visible (GIMP_ITEM (vectors)));
+}
+
+static void
+gimp_display_shell_vectors_add_handler (GimpContainer    *container,
+                                        GimpVectors      *vectors,
+                                        GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->vectors);
+  GimpCanvasItem       *item;
+
+  item = gimp_canvas_path_new (shell,
+                               gimp_vectors_get_bezier (vectors),
+                               0, 0,
+                               FALSE,
+                               GIMP_PATH_STYLE_VECTORS);
+  gimp_canvas_item_set_visible (item,
+                                gimp_item_get_visible (GIMP_ITEM (vectors)));
+
+  gimp_canvas_proxy_group_add_item (group, vectors, item);
+  g_object_unref (item);
+}
+
+static void
+gimp_display_shell_vectors_remove_handler (GimpContainer    *container,
+                                           GimpVectors      *vectors,
+                                           GimpDisplayShell *shell)
+{
+  GimpCanvasProxyGroup *group = GIMP_CANVAS_PROXY_GROUP (shell->vectors);
+
+  gimp_canvas_proxy_group_remove_item (group, vectors);
+}
+
+static void
+gimp_display_shell_check_notify_handler (GObject          *config,
+                                         GParamSpec       *param_spec,
+                                         GimpDisplayShell *shell)
+{
+  GimpCanvasPaddingMode padding_mode;
+  GimpRGB               padding_color;
+
+  g_clear_pointer (&shell->checkerboard, cairo_pattern_destroy);
+
+  gimp_display_shell_get_padding (shell, &padding_mode, &padding_color);
+
+  switch (padding_mode)
+    {
+    case GIMP_CANVAS_PADDING_MODE_LIGHT_CHECK:
+    case GIMP_CANVAS_PADDING_MODE_DARK_CHECK:
+      gimp_display_shell_set_padding (shell, padding_mode, &padding_color);
+      break;
+
+    default:
+      break;
+    }
+
+  gimp_display_shell_expose_full (shell);
+}
+
+static void
+gimp_display_shell_title_notify_handler (GObject          *config,
+                                         GParamSpec       *param_spec,
+                                         GimpDisplayShell *shell)
+{
+  gimp_display_shell_title_update (shell);
+}
+
+static void
+gimp_display_shell_nav_size_notify_handler (GObject          *config,
+                                            GParamSpec       *param_spec,
+                                            GimpDisplayShell *shell)
+{
+  g_clear_pointer (&shell->nav_popup, gtk_widget_destroy);
+}
+
+static void
+gimp_display_shell_monitor_res_notify_handler (GObject          *config,
+                                               GParamSpec       *param_spec,
+                                               GimpDisplayShell *shell)
+{
+  if (GIMP_DISPLAY_CONFIG (config)->monitor_res_from_gdk)
+    {
+      gimp_get_monitor_resolution (gtk_widget_get_screen (GTK_WIDGET (shell)),
+                                   gimp_widget_get_monitor (GTK_WIDGET (shell)),
+                                   &shell->monitor_xres,
+                                   &shell->monitor_yres);
+    }
+  else
+    {
+      shell->monitor_xres = GIMP_DISPLAY_CONFIG (config)->monitor_xres;
+      shell->monitor_yres = GIMP_DISPLAY_CONFIG (config)->monitor_yres;
+    }
+
+  gimp_display_shell_scale_update (shell);
+
+  if (! shell->dot_for_dot)
+    {
+      gimp_display_shell_scroll_clamp_and_update (shell);
+
+      gimp_display_shell_scaled (shell);
+
+      gimp_display_shell_expose_full (shell);
+    }
+}
+
+static void
+gimp_display_shell_padding_notify_handler (GObject          *config,
+                                           GParamSpec       *param_spec,
+                                           GimpDisplayShell *shell)
+{
+  GimpDisplayConfig     *display_config;
+  GimpImageWindow       *window;
+  gboolean               fullscreen;
+  GimpCanvasPaddingMode  padding_mode;
+  GimpRGB                padding_color;
+
+  display_config = shell->display->config;
+
+  window = gimp_display_shell_get_window (shell);
+
+  if (window)
+    fullscreen = gimp_image_window_get_fullscreen (window);
+  else
+    fullscreen = FALSE;
+
+  /*  if the user did not set the padding mode for this display explicitly  */
+  if (! shell->fullscreen_options->padding_mode_set)
+    {
+      padding_mode  = display_config->default_fullscreen_view->padding_mode;
+      padding_color = display_config->default_fullscreen_view->padding_color;
+
+      if (fullscreen)
+        {
+          gimp_display_shell_set_padding (shell, padding_mode, &padding_color);
+        }
+      else
+        {
+          shell->fullscreen_options->padding_mode  = padding_mode;
+          shell->fullscreen_options->padding_color = padding_color;
+        }
+    }
+
+  /*  if the user did not set the padding mode for this display explicitly  */
+  if (! shell->options->padding_mode_set)
+    {
+      padding_mode  = display_config->default_view->padding_mode;
+      padding_color = display_config->default_view->padding_color;
+
+      if (fullscreen)
+        {
+          shell->options->padding_mode  = padding_mode;
+          shell->options->padding_color = padding_color;
+        }
+      else
+        {
+          gimp_display_shell_set_padding (shell, padding_mode, &padding_color);
+        }
+    }
+}
+
+static void
+gimp_display_shell_ants_speed_notify_handler (GObject          *config,
+                                              GParamSpec       *param_spec,
+                                              GimpDisplayShell *shell)
+{
+  gimp_display_shell_selection_pause (shell);
+  gimp_display_shell_selection_resume (shell);
+}
+
+static void
+gimp_display_shell_quality_notify_handler (GObject          *config,
+                                           GParamSpec       *param_spec,
+                                           GimpDisplayShell *shell)
+{
+  gimp_display_shell_expose_full (shell);
+}
+
+static void
+gimp_display_shell_color_config_notify_handler (GObject          *config,
+                                                GParamSpec       *param_spec,
+                                                GimpDisplayShell *shell)
+{
+  if (param_spec)
+    {
+      gboolean copy = TRUE;
+
+      if (! strcmp (param_spec->name, "mode")                                 ||
+          ! strcmp (param_spec->name, "display-rendering-intent")             ||
+          ! strcmp (param_spec->name, "display-use-black-point-compensation") ||
+          ! strcmp (param_spec->name, "printer-profile")                      ||
+          ! strcmp (param_spec->name, "simulation-rendering-intent")          ||
+          ! strcmp (param_spec->name, "simulation-use-black-point-compensation") ||
+          ! strcmp (param_spec->name, "simulation-gamut-check"))
+        {
+          if (shell->color_config_set)
+            copy = FALSE;
+        }
+
+      if (copy)
+        {
+          GValue value = G_VALUE_INIT;
+
+          g_value_init (&value, param_spec->value_type);
+
+          g_object_get_property (config,
+                                 param_spec->name, &value);
+          g_object_set_property (G_OBJECT (shell->color_config),
+                                 param_spec->name, &value);
+
+          g_value_unset (&value);
+        }
+    }
+  else
+    {
+      gimp_config_copy (GIMP_CONFIG (config),
+                        GIMP_CONFIG (shell->color_config),
+                        0);
+      shell->color_config_set = FALSE;
+    }
+}
+
+static void
+gimp_display_shell_display_changed_handler (GimpContext      *context,
+                                            GimpDisplay      *display,
+                                            GimpDisplayShell *shell)
+{
+  if (shell->display == display)
+    gimp_display_shell_update_priority_rect (shell);
+}