1 files changed, 128 insertions, 0 deletions
diff --git a/app/display/gimpdisplay-handlers.c b/app/display/gimpdisplay-handlers.c
new file mode 100644
index 0000000..94cb863
--- /dev/null
+++ b/app/display/gimpdisplay-handlers.c
@@ -0,0 +1,128 @@
+/* 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 "display-types.h"
+
+#include "core/gimpimage.h"
+
+#include "gimpdisplay.h"
+#include "gimpdisplay-handlers.h"
+
+
+/*  local function prototypes  */
+
+static void   gimp_display_update_handler         (GimpProjection *projection,
+                                                   gboolean        now,
+                                                   gint            x,
+                                                   gint            y,
+                                                   gint            w,
+                                                   gint            h,
+                                                   GimpDisplay    *display);
+
+static void   gimp_display_bounds_changed_handler (GimpImage      *image,
+                                                   gint            old_x,
+                                                   gint            old_y,
+                                                   GimpDisplay    *display);
+static void   gimp_display_flush_handler          (GimpImage      *image,
+                                                   gboolean        invalidate_preview,
+                                                   GimpDisplay    *display);
+
+
+/*  public functions  */
+
+void
+gimp_display_connect (GimpDisplay *display)
+{
+  GimpImage *image;
+
+  g_return_if_fail (GIMP_IS_DISPLAY (display));
+
+  image = gimp_display_get_image (display);
+
+  g_return_if_fail (GIMP_IS_IMAGE (image));
+
+  g_signal_connect (gimp_image_get_projection (image), "update",
+                    G_CALLBACK (gimp_display_update_handler),
+                    display);
+
+  g_signal_connect (image, "bounds-changed",
+                    G_CALLBACK (gimp_display_bounds_changed_handler),
+                    display);
+  g_signal_connect (image, "flush",
+                    G_CALLBACK (gimp_display_flush_handler),
+                    display);
+}
+
+void
+gimp_display_disconnect (GimpDisplay *display)
+{
+  GimpImage *image;
+
+  g_return_if_fail (GIMP_IS_DISPLAY (display));
+
+  image = gimp_display_get_image (display);
+
+  g_return_if_fail (GIMP_IS_IMAGE (image));
+
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_flush_handler,
+                                        display);
+  g_signal_handlers_disconnect_by_func (image,
+                                        gimp_display_bounds_changed_handler,
+                                        display);
+
+  g_signal_handlers_disconnect_by_func (gimp_image_get_projection (image),
+                                        gimp_display_update_handler,
+                                        display);
+}
+
+
+/*  private functions  */
+
+static void
+gimp_display_update_handler (GimpProjection *projection,
+                             gboolean        now,
+                             gint            x,
+                             gint            y,
+                             gint            w,
+                             gint            h,
+                             GimpDisplay    *display)
+{
+  gimp_display_update_area (display, now, x, y, w, h);
+}
+
+static void
+gimp_display_bounds_changed_handler (GimpImage   *image,
+                                     gint         old_x,
+                                     gint         old_y,
+                                     GimpDisplay *display)
+{
+  gimp_display_update_bounding_box (display);
+}
+
+static void
+gimp_display_flush_handler (GimpImage   *image,
+                            gboolean     invalidate_preview,
+                            GimpDisplay *display)
+{
+  gimp_display_flush (display);
+}