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-rw-r--r--app/display/gimpcanvasrectangle.c360
1 files changed, 360 insertions, 0 deletions
diff --git a/app/display/gimpcanvasrectangle.c b/app/display/gimpcanvasrectangle.c
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+++ b/app/display/gimpcanvasrectangle.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvasrectangle.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 "gimpcanvasrectangle.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_X,
+ PROP_Y,
+ PROP_WIDTH,
+ PROP_HEIGHT,
+ PROP_FILLED
+};
+
+
+typedef struct _GimpCanvasRectanglePrivate GimpCanvasRectanglePrivate;
+
+struct _GimpCanvasRectanglePrivate
+{
+ gdouble x;
+ gdouble y;
+ gdouble width;
+ gdouble height;
+ gboolean filled;
+};
+
+#define GET_PRIVATE(rectangle) \
+ ((GimpCanvasRectanglePrivate *) gimp_canvas_rectangle_get_instance_private ((GimpCanvasRectangle *) (rectangle)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_rectangle_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_rectangle_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_rectangle_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_rectangle_get_extents (GimpCanvasItem *item);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasRectangle, gimp_canvas_rectangle,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_rectangle_parent_class
+
+
+static void
+gimp_canvas_rectangle_class_init (GimpCanvasRectangleClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_rectangle_set_property;
+ object_class->get_property = gimp_canvas_rectangle_get_property;
+
+ item_class->draw = gimp_canvas_rectangle_draw;
+ item_class->get_extents = gimp_canvas_rectangle_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_FILLED,
+ g_param_spec_boolean ("filled", NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_rectangle_init (GimpCanvasRectangle *rectangle)
+{
+}
+
+static void
+gimp_canvas_rectangle_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasRectanglePrivate *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_FILLED:
+ private->filled = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_rectangle_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasRectanglePrivate *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_FILLED:
+ g_value_set_boolean (value, private->filled);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_rectangle_transform (GimpCanvasItem *item,
+ gdouble *x,
+ gdouble *y,
+ gdouble *w,
+ gdouble *h)
+{
+ GimpCanvasRectanglePrivate *private = GET_PRIVATE (item);
+ gdouble x1, y1;
+ gdouble x2, y2;
+
+ gimp_canvas_item_transform_xy_f (item,
+ MIN (private->x,
+ private->x + private->width),
+ MIN (private->y,
+ private->y + private->height),
+ &x1, &y1);
+ gimp_canvas_item_transform_xy_f (item,
+ MAX (private->x,
+ private->x + private->width),
+ MAX (private->y,
+ private->y + private->height),
+ &x2, &y2);
+
+ x1 = floor (x1);
+ y1 = floor (y1);
+ x2 = ceil (x2);
+ y2 = ceil (y2);
+
+ if (private->filled)
+ {
+ *x = x1;
+ *y = y1;
+ *w = x2 - x1;
+ *h = y2 - y1;
+ }
+ else
+ {
+ *x = x1 + 0.5;
+ *y = y1 + 0.5;
+ *w = x2 - 0.5 - *x;
+ *h = y2 - 0.5 - *y;
+
+ *w = MAX (0.0, *w);
+ *h = MAX (0.0, *h);
+ }
+}
+
+static void
+gimp_canvas_rectangle_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasRectanglePrivate *private = GET_PRIVATE (item);
+ gdouble x, y;
+ gdouble w, h;
+
+ gimp_canvas_rectangle_transform (item, &x, &y, &w, &h);
+
+ cairo_rectangle (cr, x, y, w, h);
+
+ if (private->filled)
+ _gimp_canvas_item_fill (item, cr);
+ else
+ _gimp_canvas_item_stroke (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_rectangle_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasRectanglePrivate *private = GET_PRIVATE (item);
+ cairo_rectangle_int_t rectangle;
+ gdouble x, y;
+ gdouble w, h;
+
+ gimp_canvas_rectangle_transform (item, &x, &y, &w, &h);
+
+ if (private->filled)
+ {
+ rectangle.x = floor (x - 1.0);
+ rectangle.y = floor (y - 1.0);
+ rectangle.width = ceil (w + 2.0);
+ rectangle.height = ceil (h + 2.0);
+
+ return cairo_region_create_rectangle (&rectangle);
+ }
+ else if (w > 64 && h > 64)
+ {
+ cairo_region_t *region;
+
+ /* left */
+ rectangle.x = floor (x - 1.5);
+ rectangle.y = floor (y - 1.5);
+ rectangle.width = 3.0;
+ rectangle.height = ceil (h + 3.0);
+
+ region = cairo_region_create_rectangle (&rectangle);
+
+ /* right */
+ rectangle.x = floor (x + w - 1.5);
+
+ cairo_region_union_rectangle (region, &rectangle);
+
+ /* top */
+ rectangle.x = floor (x - 1.5);
+ rectangle.y = floor (y - 1.5);
+ rectangle.width = ceil (w + 3.0);
+ rectangle.height = 3.0;
+
+ cairo_region_union_rectangle (region, &rectangle);
+
+ /* bottom */
+ rectangle.y = floor (y + h - 1.5);
+
+ cairo_region_union_rectangle (region, &rectangle);
+
+ return region;
+ }
+ else
+ {
+ 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_rectangle_new (GimpDisplayShell *shell,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ gboolean filled)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_RECTANGLE,
+ "shell", shell,
+ "x", x,
+ "y", y,
+ "width", width,
+ "height", height,
+ "filled", filled,
+ NULL);
+}
+
+void
+gimp_canvas_rectangle_set (GimpCanvasItem *rectangle,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_RECTANGLE (rectangle));
+
+ gimp_canvas_item_begin_change (rectangle);
+
+ g_object_set (rectangle,
+ "x", x,
+ "y", y,
+ "width", width,
+ "height", height,
+ NULL);
+
+ gimp_canvas_item_end_change (rectangle);
+}
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