[gimp] app: add a corner canvas item class
- From: Michael Natterer <mitch src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp] app: add a corner canvas item class
- Date: Fri, 24 Sep 2010 08:50:28 +0000 (UTC)
commit a29a7ec4a2cd78177b404a51181583edc2ea1155
Author: Michael Natterer <mitch gimp org>
Date: Fri Sep 24 10:50:05 2010 +0200
app: add a corner canvas item class
app/display/Makefile.am | 2 +
app/display/gimpcanvascorner.c | 440 ++++++++++++++++++++++++++++++++++++++++
app/display/gimpcanvascorner.h | 62 ++++++
3 files changed, 504 insertions(+), 0 deletions(-)
---
diff --git a/app/display/Makefile.am b/app/display/Makefile.am
index 35aa234..6463d9e 100644
--- a/app/display/Makefile.am
+++ b/app/display/Makefile.am
@@ -21,6 +21,8 @@ libappdisplay_a_sources = \
gimpcanvas.h \
gimpcanvasboundary.c \
gimpcanvasboundary.h \
+ gimpcanvascorner.c \
+ gimpcanvascorner.h \
gimpcanvasguide.c \
gimpcanvasguide.h \
gimpcanvashandle.c \
diff --git a/app/display/gimpcanvascorner.c b/app/display/gimpcanvascorner.c
new file mode 100644
index 0000000..5e5a646
--- /dev/null
+++ b/app/display/gimpcanvascorner.c
@@ -0,0 +1,440 @@
+/* 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 <http://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"
+#include "gimpdisplayshell-transform.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;
+ GtkAnchorType anchor;
+ gint corner_width;
+ gint corner_height;
+ gboolean outside;
+};
+
+#define GET_PRIVATE(corner) \
+ G_TYPE_INSTANCE_GET_PRIVATE (corner, \
+ GIMP_TYPE_CANVAS_CORNER, \
+ GimpCanvasCornerPrivate)
+
+
+/* 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,
+ GimpDisplayShell *shell,
+ cairo_t *cr);
+static GdkRegion * gimp_canvas_corner_get_extents (GimpCanvasItem *item,
+ GimpDisplayShell *shell);
+
+
+G_DEFINE_TYPE (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,
+ GTK_TYPE_ANCHOR_TYPE,
+ GTK_ANCHOR_CENTER,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_CORNER_WIDTH,
+ g_param_spec_int ("corner-width", NULL, NULL,
+ 3, 1001, 7,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_CORNER_HEIGHT,
+ g_param_spec_int ("corner-height", NULL, NULL,
+ 3, 1001, 7,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_OUTSIDE,
+ g_param_spec_boolean ("outside", NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+
+ g_type_class_add_private (klass, sizeof (GimpCanvasCornerPrivate));
+}
+
+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,
+ GimpDisplayShell *shell,
+ gdouble *x,
+ gdouble *y)
+{
+ 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_display_shell_transform_xy_f (shell,
+ MIN (private->x,
+ private->x + private->width),
+ MIN (private->y,
+ private->y + private->height),
+ &rx, &ry);
+ gimp_display_shell_transform_xy_f (shell,
+ MAX (private->x,
+ private->x + private->width),
+ MAX (private->y,
+ private->y + private->height),
+ &rw, &rh);
+
+ rw -= rx;
+ rh -= ry;
+
+ rx = PROJ_ROUND (rx) + 0.5;
+ ry = PROJ_ROUND (ry) + 0.5;
+ rw = PROJ_ROUND (rw) - 1.0;
+ rh = PROJ_ROUND (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;
+
+ switch (private->anchor)
+ {
+ case GTK_ANCHOR_CENTER:
+ break;
+
+ case GTK_ANCHOR_NORTH_WEST:
+ if (private->outside)
+ {
+ *x = rx - private->corner_width;
+ *y = ry - private->corner_height;
+ }
+ else
+ {
+ *x = rx;
+ *y = ry;
+ }
+ break;
+
+ case GTK_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 GTK_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 GTK_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 GTK_ANCHOR_NORTH:
+ if (private->outside)
+ {
+ *x = rx;
+ *y = ry - private->corner_height;
+ }
+ else
+ {
+ *x = rx + top_and_bottom_handle_x_offset;
+ *y = ry;
+ }
+ break;
+
+ case GTK_ANCHOR_SOUTH:
+ if (private->outside)
+ {
+ *x = rx;
+ *y = ry + rh;
+ }
+ else
+ {
+ *x = rx + top_and_bottom_handle_x_offset;
+ *y = ry + rh - private->corner_height;
+ }
+ break;
+
+ case GTK_ANCHOR_WEST:
+ if (private->outside)
+ {
+ *x = rx - private->corner_width;
+ *y = ry;
+ }
+ else
+ {
+ *x = rx;
+ *y = ry + left_and_right_handle_y_offset;
+ }
+ break;
+
+ case GTK_ANCHOR_EAST:
+ if (private->outside)
+ {
+ *x = rx + rw;
+ *y = ry;
+ }
+ else
+ {
+ *x = rx + rw - private->corner_width;
+ *y = ry + left_and_right_handle_y_offset;
+ }
+ break;
+ }
+}
+
+static void
+gimp_canvas_corner_draw (GimpCanvasItem *item,
+ GimpDisplayShell *shell,
+ cairo_t *cr)
+{
+ GimpCanvasCornerPrivate *private = GET_PRIVATE (item);
+ gdouble x, y;
+
+ gimp_canvas_corner_transform (item, shell, &x, &y);
+
+ cairo_rectangle (cr, x, y, private->corner_width, private->corner_height);
+
+ _gimp_canvas_item_stroke (item, shell, cr);
+}
+
+static GdkRegion *
+gimp_canvas_corner_get_extents (GimpCanvasItem *item,
+ GimpDisplayShell *shell)
+{
+ GimpCanvasCornerPrivate *private = GET_PRIVATE (item);
+ GdkRectangle rectangle;
+ gdouble x, y;
+
+ gimp_canvas_corner_transform (item, shell, &x, &y);
+
+ rectangle.x = floor (x - 1.5);
+ rectangle.y = floor (y - 1.5);
+ rectangle.width = ceil (private->corner_width + 3.0);
+ rectangle.height = ceil (private->corner_height + 3.0);
+
+ return gdk_region_rectangle (&rectangle);
+}
+
+GimpCanvasItem *
+gimp_canvas_corner_new (gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ GtkAnchorType anchor,
+ gint corner_width,
+ gint corner_height,
+ gboolean outside)
+{
+ return g_object_new (GIMP_TYPE_CANVAS_CORNER,
+ "x", x,
+ "y", y,
+ "width", width,
+ "height", height,
+ "anchor", anchor,
+ "corner-width", corner_width,
+ "corner-height", corner_height,
+ "outside", outside,
+ NULL);
+}
diff --git a/app/display/gimpcanvascorner.h b/app/display/gimpcanvascorner.h
new file mode 100644
index 0000000..767e4a0
--- /dev/null
+++ b/app/display/gimpcanvascorner.h
@@ -0,0 +1,62 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvascorner.h
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_CANVAS_CORNER_H__
+#define __GIMP_CANVAS_CORNER_H__
+
+
+#include "gimpcanvasitem.h"
+
+
+#define GIMP_TYPE_CANVAS_CORNER (gimp_canvas_corner_get_type ())
+#define GIMP_CANVAS_CORNER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_CORNER, GimpCanvasCorner))
+#define GIMP_CANVAS_CORNER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_CORNER, GimpCanvasCornerClass))
+#define GIMP_IS_CANVAS_CORNER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_CORNER))
+#define GIMP_IS_CANVAS_CORNER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_CORNER))
+#define GIMP_CANVAS_CORNER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_CORNER, GimpCanvasCornerClass))
+
+
+typedef struct _GimpCanvasCorner GimpCanvasCorner;
+typedef struct _GimpCanvasCornerClass GimpCanvasCornerClass;
+
+struct _GimpCanvasCorner
+{
+ GimpCanvasItem parent_instance;
+};
+
+struct _GimpCanvasCornerClass
+{
+ GimpCanvasItemClass parent_class;
+};
+
+
+GType gimp_canvas_corner_get_type (void) G_GNUC_CONST;
+
+GimpCanvasItem * gimp_canvas_corner_new (gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ GtkAnchorType anchor,
+ gint corner_width,
+ gint corner_height,
+ gboolean outside);
+
+
+#endif /* __GIMP_CANVAS_CORNER_H__ */
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