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-rw-r--r--app/display/gimpcanvascorner.c468
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diff --git a/app/display/gimpcanvascorner.c b/app/display/gimpcanvascorner.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvascorner.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 "gimpcanvascorner.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_X,
+ PROP_Y,
+ PROP_WIDTH,
+ PROP_HEIGHT,
+ PROP_ANCHOR,
+ PROP_CORNER_WIDTH,
+ PROP_CORNER_HEIGHT,
+ PROP_OUTSIDE
+};
+
+
+typedef struct _GimpCanvasCornerPrivate GimpCanvasCornerPrivate;
+
+struct _GimpCanvasCornerPrivate
+{
+ gdouble x;
+ gdouble y;
+ gdouble width;
+ gdouble height;
+ GimpHandleAnchor anchor;
+ gint corner_width;
+ gint corner_height;
+ gboolean outside;
+};
+
+#define GET_PRIVATE(corner) \
+ ((GimpCanvasCornerPrivate *) gimp_canvas_corner_get_instance_private ((GimpCanvasCorner *) (corner)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_corner_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_corner_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_corner_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_corner_get_extents (GimpCanvasItem *item);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasCorner, gimp_canvas_corner,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_corner_parent_class
+
+
+static void
+gimp_canvas_corner_class_init (GimpCanvasCornerClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_corner_set_property;
+ object_class->get_property = gimp_canvas_corner_get_property;
+
+ item_class->draw = gimp_canvas_corner_draw;
+ item_class->get_extents = gimp_canvas_corner_get_extents;
+
+ 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_double ("width", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_HEIGHT,
+ g_param_spec_double ("height", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ 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_CORNER_WIDTH,
+ g_param_spec_int ("corner-width", NULL, NULL,
+ 3, GIMP_MAX_IMAGE_SIZE, 3,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_CORNER_HEIGHT,
+ g_param_spec_int ("corner-height", NULL, NULL,
+ 3, GIMP_MAX_IMAGE_SIZE, 3,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_OUTSIDE,
+ g_param_spec_boolean ("outside", NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_corner_init (GimpCanvasCorner *corner)
+{
+}
+
+static void
+gimp_canvas_corner_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasCornerPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ 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_double (value);
+ break;
+ case PROP_HEIGHT:
+ private->height = g_value_get_double (value);
+ break;
+ case PROP_ANCHOR:
+ private->anchor = g_value_get_enum (value);
+ break;
+ case PROP_CORNER_WIDTH:
+ private->corner_width = g_value_get_int (value);
+ break;
+ case PROP_CORNER_HEIGHT:
+ private->corner_height = g_value_get_int (value);
+ break;
+ case PROP_OUTSIDE:
+ private->outside = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_corner_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasCornerPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ 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_double (value, private->width);
+ break;
+ case PROP_HEIGHT:
+ g_value_set_double (value, private->height);
+ break;
+ case PROP_ANCHOR:
+ g_value_set_enum (value, private->anchor);
+ break;
+ case PROP_CORNER_WIDTH:
+ g_value_set_int (value, private->corner_width);
+ break;
+ case PROP_CORNER_HEIGHT:
+ g_value_set_int (value, private->corner_height);
+ break;
+ case PROP_OUTSIDE:
+ g_value_set_boolean (value, private->outside);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_corner_transform (GimpCanvasItem *item,
+ gdouble *x,
+ gdouble *y,
+ gdouble *w,
+ gdouble *h)
+{
+ GimpCanvasCornerPrivate *private = GET_PRIVATE (item);
+ gdouble rx, ry;
+ gdouble rw, rh;
+ gint top_and_bottom_handle_x_offset;
+ gint left_and_right_handle_y_offset;
+
+ gimp_canvas_item_transform_xy_f (item,
+ MIN (private->x,
+ private->x + private->width),
+ MIN (private->y,
+ private->y + private->height),
+ &rx, &ry);
+ gimp_canvas_item_transform_xy_f (item,
+ MAX (private->x,
+ private->x + private->width),
+ MAX (private->y,
+ private->y + private->height),
+ &rw, &rh);
+
+ rw -= rx;
+ rh -= ry;
+
+ rx = floor (rx) + 0.5;
+ ry = floor (ry) + 0.5;
+ rw = ceil (rw) - 1.0;
+ rh = ceil (rh) - 1.0;
+
+ top_and_bottom_handle_x_offset = (rw - private->corner_width) / 2;
+ left_and_right_handle_y_offset = (rh - private->corner_height) / 2;
+
+ *w = private->corner_width;
+ *h = private->corner_height;
+
+ switch (private->anchor)
+ {
+ case GIMP_HANDLE_ANCHOR_CENTER:
+ break;
+
+ case GIMP_HANDLE_ANCHOR_NORTH_WEST:
+ if (private->outside)
+ {
+ *x = rx - private->corner_width;
+ *y = ry - private->corner_height;
+ }
+ else
+ {
+ *x = rx;
+ *y = ry;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_NORTH_EAST:
+ if (private->outside)
+ {
+ *x = rx + rw;
+ *y = ry - private->corner_height;
+ }
+ else
+ {
+ *x = rx + rw - private->corner_width;
+ *y = ry;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_SOUTH_WEST:
+ if (private->outside)
+ {
+ *x = rx - private->corner_width;
+ *y = ry + rh;
+ }
+ else
+ {
+ *x = rx;
+ *y = ry + rh - private->corner_height;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_SOUTH_EAST:
+ if (private->outside)
+ {
+ *x = rx + rw;
+ *y = ry + rh;
+ }
+ else
+ {
+ *x = rx + rw - private->corner_width;
+ *y = ry + rh - private->corner_height;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_NORTH:
+ if (private->outside)
+ {
+ *x = rx;
+ *y = ry - private->corner_height;
+ *w = rw;
+ }
+ else
+ {
+ *x = rx + top_and_bottom_handle_x_offset;
+ *y = ry;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_SOUTH:
+ if (private->outside)
+ {
+ *x = rx;
+ *y = ry + rh;
+ *w = rw;
+ }
+ else
+ {
+ *x = rx + top_and_bottom_handle_x_offset;
+ *y = ry + rh - private->corner_height;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_WEST:
+ if (private->outside)
+ {
+ *x = rx - private->corner_width;
+ *y = ry;
+ *h = rh;
+ }
+ else
+ {
+ *x = rx;
+ *y = ry + left_and_right_handle_y_offset;
+ }
+ break;
+
+ case GIMP_HANDLE_ANCHOR_EAST:
+ if (private->outside)
+ {
+ *x = rx + rw;
+ *y = ry;
+ *h = rh;
+ }
+ else
+ {
+ *x = rx + rw - private->corner_width;
+ *y = ry + left_and_right_handle_y_offset;
+ }
+ break;
+ }
+}
+
+static void
+gimp_canvas_corner_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ gdouble x, y;
+ gdouble w, h;
+
+ gimp_canvas_corner_transform (item, &x, &y, &w, &h);
+
+ cairo_rectangle (cr, x, y, w, h);
+
+ _gimp_canvas_item_stroke (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_corner_get_extents (GimpCanvasItem *item)
+{
+ cairo_rectangle_int_t rectangle;
+ gdouble x, y;
+ gdouble w, h;
+
+ gimp_canvas_corner_transform (item, &x, &y, &w, &h);
+
+ rectangle.x = floor (x - 1.5);
+ rectangle.y = floor (y - 1.5);
+ rectangle.width = ceil (w + 3.0);
+ rectangle.height = ceil (h + 3.0);
+
+ return cairo_region_create_rectangle (&rectangle);
+}
+
+GimpCanvasItem *
+gimp_canvas_corner_new (GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ GimpHandleAnchor anchor,
+ gint corner_width,
+ gint corner_height,
+ gboolean outside)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_CORNER,
+ "shell", shell,
+ "x", x,
+ "y", y,
+ "width", width,
+ "height", height,
+ "anchor", anchor,
+ "corner-width", corner_width,
+ "corner-height", corner_height,
+ "outside", outside,
+ NULL);
+}
+
+void
+gimp_canvas_corner_set (GimpCanvasItem *corner,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ gint corner_width,
+ gint corner_height,
+ gboolean outside)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_CORNER (corner));
+
+ gimp_canvas_item_begin_change (corner);
+ g_object_set (corner,
+ "x", x,
+ "y", y,
+ "width", width,
+ "height", height,
+ "corner-width", corner_width,
+ "corner-height", corner_height,
+ "outside", outside,
+ NULL);
+ gimp_canvas_item_end_change (corner);
+}
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