Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 703 insertions, 0 deletions

diff --git a/app/display/gimpcanvashandle.c b/app/display/gimpcanvashandle.c
new file mode 100644
index 0000000..954eead
--- /dev/null
+++ b/app/display/gimpcanvashandle.c
@@ -0,0 +1,703 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvashandle.c
+ * Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "core/gimp-cairo.h"
+
+#include "gimpcanvashandle.h"
+#include "gimpcanvasitem-utils.h"
+#include "gimpdisplayshell.h"
+
+
+#define N_DASHES       8
+#define DASH_ON_RATIO  0.3
+#define DASH_OFF_RATIO 0.7
+
+
+enum
+{
+  PROP_0,
+  PROP_TYPE,
+  PROP_ANCHOR,
+  PROP_X,
+  PROP_Y,
+  PROP_WIDTH,
+  PROP_HEIGHT,
+  PROP_START_ANGLE,
+  PROP_SLICE_ANGLE
+};
+
+
+typedef struct _GimpCanvasHandlePrivate GimpCanvasHandlePrivate;
+
+struct _GimpCanvasHandlePrivate
+{
+  GimpHandleType   type;
+  GimpHandleAnchor anchor;
+  gdouble          x;
+  gdouble          y;
+  gint             width;
+  gint             height;
+  gdouble          start_angle;
+  gdouble          slice_angle;
+};
+
+#define GET_PRIVATE(handle) \
+        ((GimpCanvasHandlePrivate *) gimp_canvas_handle_get_instance_private ((GimpCanvasHandle *) (handle)))
+
+
+/*  local function prototypes  */
+
+static void             gimp_canvas_handle_set_property (GObject        *object,
+                                                         guint           property_id,
+                                                         const GValue   *value,
+                                                         GParamSpec     *pspec);
+static void             gimp_canvas_handle_get_property (GObject        *object,
+                                                         guint           property_id,
+                                                         GValue         *value,
+                                                         GParamSpec     *pspec);
+static void             gimp_canvas_handle_draw         (GimpCanvasItem *item,
+                                                         cairo_t        *cr);
+static cairo_region_t * gimp_canvas_handle_get_extents  (GimpCanvasItem *item);
+static gboolean         gimp_canvas_handle_hit          (GimpCanvasItem *item,
+                                                         gdouble         x,
+                                                         gdouble         y);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasHandle, gimp_canvas_handle,
+                            GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_handle_parent_class
+
+
+static void
+gimp_canvas_handle_class_init (GimpCanvasHandleClass *klass)
+{
+  GObjectClass        *object_class = G_OBJECT_CLASS (klass);
+  GimpCanvasItemClass *item_class   = GIMP_CANVAS_ITEM_CLASS (klass);
+
+  object_class->set_property = gimp_canvas_handle_set_property;
+  object_class->get_property = gimp_canvas_handle_get_property;
+
+  item_class->draw           = gimp_canvas_handle_draw;
+  item_class->get_extents    = gimp_canvas_handle_get_extents;
+  item_class->hit            = gimp_canvas_handle_hit;
+
+  g_object_class_install_property (object_class, PROP_TYPE,
+                                   g_param_spec_enum ("type", NULL, NULL,
+                                                      GIMP_TYPE_HANDLE_TYPE,
+                                                      GIMP_HANDLE_CROSS,
+                                                      GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_ANCHOR,
+                                   g_param_spec_enum ("anchor", NULL, NULL,
+                                                      GIMP_TYPE_HANDLE_ANCHOR,
+                                                      GIMP_HANDLE_ANCHOR_CENTER,
+                                                      GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_X,
+                                   g_param_spec_double ("x", NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE, 0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_Y,
+                                   g_param_spec_double ("y", NULL, NULL,
+                                                        -GIMP_MAX_IMAGE_SIZE,
+                                                        GIMP_MAX_IMAGE_SIZE, 0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_WIDTH,
+                                   g_param_spec_int ("width", NULL, NULL,
+                                                     3, 1001, 7,
+                                                     GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_HEIGHT,
+                                   g_param_spec_int ("height", NULL, NULL,
+                                                     3, 1001, 7,
+                                                     GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_START_ANGLE,
+                                   g_param_spec_double ("start-angle", NULL, NULL,
+                                                        -1000, 1000, 0,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_SLICE_ANGLE,
+                                   g_param_spec_double ("slice-angle", NULL, NULL,
+                                                        -1000, 1000, 2 * G_PI,
+                                                        GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_handle_init (GimpCanvasHandle *handle)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (handle);
+
+  gimp_canvas_item_set_line_cap (GIMP_CANVAS_ITEM (handle),
+                                 CAIRO_LINE_CAP_SQUARE);
+
+  private->start_angle = 0.0;
+  private->slice_angle = 2.0 * G_PI;
+}
+
+static void
+gimp_canvas_handle_set_property (GObject      *object,
+                                 guint         property_id,
+                                 const GValue *value,
+                                 GParamSpec   *pspec)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TYPE:
+      private->type = g_value_get_enum (value);
+      break;
+    case PROP_ANCHOR:
+      private->anchor = g_value_get_enum (value);
+      break;
+    case PROP_X:
+      private->x = g_value_get_double (value);
+      break;
+    case PROP_Y:
+      private->y = g_value_get_double (value);
+      break;
+    case PROP_WIDTH:
+      private->width = g_value_get_int (value);
+      break;
+    case PROP_HEIGHT:
+      private->height = g_value_get_int (value);
+      break;
+    case PROP_START_ANGLE:
+      private->start_angle = g_value_get_double (value);
+      break;
+    case PROP_SLICE_ANGLE:
+      private->slice_angle = g_value_get_double (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_handle_get_property (GObject    *object,
+                                 guint       property_id,
+                                 GValue     *value,
+                                 GParamSpec *pspec)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
+
+  switch (property_id)
+    {
+    case PROP_TYPE:
+      g_value_set_enum (value, private->type);
+      break;
+    case PROP_ANCHOR:
+      g_value_set_enum (value, private->anchor);
+      break;
+    case PROP_X:
+      g_value_set_double (value, private->x);
+      break;
+    case PROP_Y:
+      g_value_set_double (value, private->y);
+      break;
+    case PROP_WIDTH:
+      g_value_set_int (value, private->width);
+      break;
+    case PROP_HEIGHT:
+      g_value_set_int (value, private->height);
+      break;
+    case PROP_START_ANGLE:
+      g_value_set_double (value, private->start_angle);
+      break;
+    case PROP_SLICE_ANGLE:
+      g_value_set_double (value, private->slice_angle);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_handle_transform (GimpCanvasItem *item,
+                              gdouble        *x,
+                              gdouble        *y)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
+
+  gimp_canvas_item_transform_xy_f (item,
+                                   private->x, private->y,
+                                   x, y);
+
+  switch (private->type)
+    {
+    case GIMP_HANDLE_SQUARE:
+    case GIMP_HANDLE_DASHED_SQUARE:
+    case GIMP_HANDLE_FILLED_SQUARE:
+      gimp_canvas_item_shift_to_north_west (private->anchor,
+                                            *x, *y,
+                                            private->width,
+                                            private->height,
+                                            x, y);
+      break;
+
+    case GIMP_HANDLE_CIRCLE:
+    case GIMP_HANDLE_DASHED_CIRCLE:
+    case GIMP_HANDLE_FILLED_CIRCLE:
+    case GIMP_HANDLE_CROSS:
+    case GIMP_HANDLE_CROSSHAIR:
+    case GIMP_HANDLE_DIAMOND:
+    case GIMP_HANDLE_DASHED_DIAMOND:
+    case GIMP_HANDLE_FILLED_DIAMOND:
+      gimp_canvas_item_shift_to_center (private->anchor,
+                                        *x, *y,
+                                        private->width,
+                                        private->height,
+                                        x, y);
+      break;
+
+    default:
+      break;
+    }
+
+  *x = floor (*x) + 0.5;
+  *y = floor (*y) + 0.5;
+}
+
+static void
+gimp_canvas_handle_draw (GimpCanvasItem *item,
+                         cairo_t        *cr)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
+  gdouble                  x, y, tx, ty;
+
+  gimp_canvas_handle_transform (item, &x, &y);
+
+  gimp_canvas_item_transform_xy_f (item,
+                                   private->x, private->y,
+                                   &tx, &ty);
+
+  tx = floor (tx) + 0.5;
+  ty = floor (ty) + 0.5;
+
+  switch (private->type)
+    {
+    case GIMP_HANDLE_SQUARE:
+    case GIMP_HANDLE_DASHED_SQUARE:
+    case GIMP_HANDLE_FILLED_SQUARE:
+    case GIMP_HANDLE_DIAMOND:
+    case GIMP_HANDLE_DASHED_DIAMOND:
+    case GIMP_HANDLE_FILLED_DIAMOND:
+    case GIMP_HANDLE_CROSS:
+      cairo_save (cr);
+      cairo_translate (cr, tx, ty);
+      cairo_rotate (cr, private->start_angle);
+      cairo_translate (cr, -tx, -ty);
+
+      switch (private->type)
+        {
+        case GIMP_HANDLE_SQUARE:
+        case GIMP_HANDLE_DASHED_SQUARE:
+          if (private->type == GIMP_HANDLE_DASHED_SQUARE)
+            {
+              gdouble circ;
+              gdouble dashes[2];
+
+              cairo_save (cr);
+
+              circ = 2.0 * ((private->width - 1.0) + (private->height - 1.0));
+
+              dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
+              dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
+
+              cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
+            }
+
+          cairo_rectangle (cr, x, y, private->width - 1.0, private->height - 1.0);
+          _gimp_canvas_item_stroke (item, cr);
+
+          if (private->type == GIMP_HANDLE_DASHED_SQUARE)
+            cairo_restore (cr);
+          break;
+
+        case GIMP_HANDLE_FILLED_SQUARE:
+          cairo_rectangle (cr, x - 0.5, y - 0.5, private->width, private->height);
+          _gimp_canvas_item_fill (item, cr);
+          break;
+
+        case GIMP_HANDLE_DIAMOND:
+        case GIMP_HANDLE_DASHED_DIAMOND:
+        case GIMP_HANDLE_FILLED_DIAMOND:
+          if (private->type == GIMP_HANDLE_DASHED_DIAMOND)
+            {
+              gdouble circ;
+              gdouble dashes[2];
+
+              cairo_save (cr);
+
+              circ = 4.0 * hypot ((gdouble) private->width  / 2.0,
+                                  (gdouble) private->height / 2.0);
+
+              dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
+              dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
+
+              cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
+            }
+
+          cairo_move_to (cr, x, y - (gdouble) private->height / 2.0);
+          cairo_line_to (cr, x + (gdouble) private->width / 2.0, y);
+          cairo_line_to (cr, x, y + (gdouble) private->height / 2.0);
+          cairo_line_to (cr, x - (gdouble) private->width / 2.0, y);
+          cairo_line_to (cr, x, y - (gdouble) private->height / 2.0);
+          if (private->type == GIMP_HANDLE_DIAMOND ||
+              private->type == GIMP_HANDLE_DASHED_DIAMOND)
+            _gimp_canvas_item_stroke (item, cr);
+          else
+            _gimp_canvas_item_fill (item, cr);
+
+          if (private->type == GIMP_HANDLE_DASHED_SQUARE)
+            cairo_restore (cr);
+          break;
+
+        case GIMP_HANDLE_CROSS:
+          cairo_move_to (cr, x - private->width / 2.0, y);
+          cairo_line_to (cr, x + private->width / 2.0 - 0.5, y);
+          cairo_move_to (cr, x, y - private->height / 2.0);
+          cairo_line_to (cr, x, y + private->height / 2.0 - 0.5);
+          _gimp_canvas_item_stroke (item, cr);
+          break;
+
+        default:
+          gimp_assert_not_reached ();
+        }
+
+      cairo_restore (cr);
+      break;
+
+    case GIMP_HANDLE_CIRCLE:
+    case GIMP_HANDLE_DASHED_CIRCLE:
+      if (private->type == GIMP_HANDLE_DASHED_CIRCLE)
+        {
+          gdouble circ;
+          gdouble dashes[2];
+
+          cairo_save (cr);
+
+          circ = 2.0 * G_PI * (private->width / 2.0);
+
+          dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
+          dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
+
+          cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
+        }
+
+      gimp_cairo_arc (cr, x, y, private->width / 2.0,
+                      private->start_angle,
+                      private->slice_angle);
+
+      _gimp_canvas_item_stroke (item, cr);
+
+      if (private->type == GIMP_HANDLE_DASHED_CIRCLE)
+        cairo_restore (cr);
+      break;
+
+    case GIMP_HANDLE_FILLED_CIRCLE:
+      cairo_move_to (cr, x, y);
+
+      gimp_cairo_arc (cr, x, y, (gdouble) private->width / 2.0,
+                      private->start_angle,
+                      private->slice_angle);
+
+      _gimp_canvas_item_fill (item, cr);
+      break;
+
+    case GIMP_HANDLE_CROSSHAIR:
+      cairo_move_to (cr, x - private->width / 2.0, y);
+      cairo_line_to (cr, x - private->width * 0.4, y);
+
+      cairo_move_to (cr, x + private->width / 2.0 - 0.5, y);
+      cairo_line_to (cr, x + private->width * 0.4, y);
+
+      cairo_move_to (cr, x, y - private->height / 2.0);
+      cairo_line_to (cr, x, y - private->height * 0.4 - 0.5);
+
+      cairo_move_to (cr, x, y + private->height / 2.0 - 0.5);
+      cairo_line_to (cr, x, y + private->height * 0.4 - 0.5);
+
+       _gimp_canvas_item_stroke (item, cr);
+      break;
+
+    default:
+      break;
+    }
+}
+
+static cairo_region_t *
+gimp_canvas_handle_get_extents (GimpCanvasItem *item)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
+  cairo_rectangle_int_t    rectangle;
+  gdouble                  x, y;
+  gdouble                  w, h;
+
+  gimp_canvas_handle_transform (item, &x, &y);
+
+  switch (private->type)
+    {
+    case GIMP_HANDLE_SQUARE:
+    case GIMP_HANDLE_DASHED_SQUARE:
+    case GIMP_HANDLE_FILLED_SQUARE:
+      w = private->width * (sqrt(2) - 1) / 2;
+      h = private->height * (sqrt(2) - 1) / 2;
+      rectangle.x      = x - 1.5 - w;
+      rectangle.y      = y - 1.5 - h;
+      rectangle.width  = private->width  + 3.0 + w * 2;
+      rectangle.height = private->height + 3.0 + h * 2;
+      break;
+
+    case GIMP_HANDLE_CIRCLE:
+    case GIMP_HANDLE_DASHED_CIRCLE:
+    case GIMP_HANDLE_FILLED_CIRCLE:
+    case GIMP_HANDLE_CROSS:
+    case GIMP_HANDLE_CROSSHAIR:
+    case GIMP_HANDLE_DIAMOND:
+    case GIMP_HANDLE_DASHED_DIAMOND:
+    case GIMP_HANDLE_FILLED_DIAMOND:
+      rectangle.x      = x - private->width  / 2.0 - 2.0;
+      rectangle.y      = y - private->height / 2.0 - 2.0;
+      rectangle.width  = private->width  + 4.0;
+      rectangle.height = private->height + 4.0;
+      break;
+
+    default:
+      break;
+    }
+
+  return cairo_region_create_rectangle (&rectangle);
+}
+
+static gboolean
+gimp_canvas_handle_hit (GimpCanvasItem *item,
+                        gdouble         x,
+                        gdouble         y)
+{
+  GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
+  gdouble                  handle_tx, handle_ty;
+  gdouble                  mx, my, tx, ty, mmx, mmy;
+  gdouble                  diamond_offset_x = 0.0;
+  gdouble                  diamond_offset_y = 0.0;
+  gdouble                  angle            = -private->start_angle;
+
+  gimp_canvas_handle_transform (item, &handle_tx, &handle_ty);
+
+  gimp_canvas_item_transform_xy_f (item,
+                                   x, y,
+                                   &mx, &my);
+
+  switch (private->type)
+    {
+    case GIMP_HANDLE_DIAMOND:
+    case GIMP_HANDLE_DASHED_DIAMOND:
+    case GIMP_HANDLE_FILLED_DIAMOND:
+      angle -= G_PI / 4.0;
+      diamond_offset_x = private->width / 2.0;
+      diamond_offset_y = private->height / 2.0;
+    case GIMP_HANDLE_SQUARE:
+    case GIMP_HANDLE_DASHED_SQUARE:
+    case GIMP_HANDLE_FILLED_SQUARE:
+      gimp_canvas_item_transform_xy_f (item,
+                                       private->x, private->y,
+                                       &tx, &ty);
+      mmx = mx - tx; mmy = my - ty;
+      mx = cos (angle) * mmx - sin (angle) * mmy + tx + diamond_offset_x;
+      my = sin (angle) * mmx + cos (angle) * mmy + ty + diamond_offset_y;
+      return mx > handle_tx && mx < handle_tx + private->width &&
+             my > handle_ty && my < handle_ty + private->height;
+
+    case GIMP_HANDLE_CIRCLE:
+    case GIMP_HANDLE_DASHED_CIRCLE:
+    case GIMP_HANDLE_FILLED_CIRCLE:
+    case GIMP_HANDLE_CROSS:
+    case GIMP_HANDLE_CROSSHAIR:
+      {
+        gint width = private->width;
+
+        if (width != private->height)
+          width = (width + private->height) / 2;
+
+        width /= 2;
+
+        return ((SQR (handle_tx - mx) + SQR (handle_ty - my)) < SQR (width));
+      }
+
+    default:
+      break;
+    }
+
+  return FALSE;
+}
+
+GimpCanvasItem *
+gimp_canvas_handle_new (GimpDisplayShell *shell,
+                        GimpHandleType    type,
+                        GimpHandleAnchor  anchor,
+                        gdouble           x,
+                        gdouble           y,
+                        gint              width,
+                        gint              height)
+{
+  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+  return g_object_new (GIMP_TYPE_CANVAS_HANDLE,
+                       "shell",  shell,
+                       "type",   type,
+                       "anchor", anchor,
+                       "x",      x,
+                       "y",      y,
+                       "width",  width,
+                       "height", height,
+                       NULL);
+}
+
+void
+gimp_canvas_handle_get_position (GimpCanvasItem *handle,
+                                 gdouble        *x,
+                                 gdouble        *y)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
+  g_return_if_fail (x != NULL);
+  g_return_if_fail (y != NULL);
+
+  g_object_get (handle,
+                "x", x,
+                "y", y,
+                NULL);
+}
+
+void
+gimp_canvas_handle_set_position (GimpCanvasItem *handle,
+                                 gdouble         x,
+                                 gdouble         y)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
+
+  gimp_canvas_item_begin_change (handle);
+
+  g_object_set (handle,
+                "x", x,
+                "y", y,
+                NULL);
+
+  gimp_canvas_item_end_change (handle);
+}
+
+gint
+gimp_canvas_handle_calc_size (GimpCanvasItem *item,
+                              gdouble         mouse_x,
+                              gdouble         mouse_y,
+                              gint            normal_size,
+                              gint            hover_size)
+{
+  gdouble x, y;
+  gdouble distance;
+  gdouble size;
+  gint    full_threshold_sq    = SQR (hover_size / 2) * 9;
+  gint    partial_threshold_sq = full_threshold_sq * 5;
+
+  g_return_val_if_fail (GIMP_IS_CANVAS_HANDLE (item), normal_size);
+
+  gimp_canvas_handle_get_position (item, &x, &y);
+  distance = gimp_canvas_item_transform_distance_square (item,
+                                                         mouse_x,
+                                                         mouse_y,
+                                                         x, y);
+
+  /*  calculate the handle size based on distance from the cursor  */
+  size = (1.0 - (distance - full_threshold_sq) /
+          (partial_threshold_sq - full_threshold_sq));
+
+  size = CLAMP (size, 0.0, 1.0);
+
+  return (gint) CLAMP ((size * hover_size),
+                       normal_size,
+                       hover_size);
+}
+
+void
+gimp_canvas_handle_get_size (GimpCanvasItem *handle,
+                             gint           *width,
+                             gint           *height)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
+  g_return_if_fail (width != NULL);
+  g_return_if_fail (height != NULL);
+
+  g_object_get (handle,
+                "width",  width,
+                "height", height,
+                NULL);
+}
+
+void
+gimp_canvas_handle_set_size (GimpCanvasItem *handle,
+                             gint            width,
+                             gint            height)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
+
+  gimp_canvas_item_begin_change (handle);
+
+  g_object_set (handle,
+                "width",  width,
+                "height", height,
+                NULL);
+
+  gimp_canvas_item_end_change (handle);
+}
+
+void
+gimp_canvas_handle_set_angles (GimpCanvasItem *handle,
+                               gdouble         start_angle,
+                               gdouble         slice_angle)
+{
+  g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
+
+  gimp_canvas_item_begin_change (handle);
+
+  g_object_set (handle,
+                "start-angle", start_angle,
+                "slice-angle", slice_angle,
+                NULL);
+
+  gimp_canvas_item_end_change (handle);
+}