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-rw-r--r--e-util/e-canvas-background.c279
1 files changed, 279 insertions, 0 deletions
diff --git a/e-util/e-canvas-background.c b/e-util/e-canvas-background.c
new file mode 100644
index 0000000000..6379697719
--- /dev/null
+++ b/e-util/e-canvas-background.c
@@ -0,0 +1,279 @@
+/*
+ * e-canvas-background.c - background color for canvas.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ *
+ * Authors:
+ * Chris Lahey <clahey@ximian.com>
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "e-canvas-background.h"
+
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <gdk/gdkkeysyms.h>
+#include <gtk/gtk.h>
+
+#include <glib/gi18n.h>
+
+#include "e-canvas.h"
+#include "e-canvas-utils.h"
+
+#define E_CANVAS_BACKGROUND_GET_PRIVATE(obj) \
+ (G_TYPE_INSTANCE_GET_PRIVATE \
+ ((obj), E_TYPE_CANVAS_BACKGROUND, ECanvasBackgroundPrivate))
+
+/* workaround for avoiding API broken */
+#define ecb_get_type e_canvas_background_get_type
+G_DEFINE_TYPE (
+ ECanvasBackground,
+ ecb,
+ GNOME_TYPE_CANVAS_ITEM)
+
+#define d(x)
+
+struct _ECanvasBackgroundPrivate {
+ guint rgba; /* Fill color, RGBA */
+};
+
+enum {
+ STYLE_SET,
+ LAST_SIGNAL
+};
+
+static guint ecb_signals[LAST_SIGNAL] = { 0, };
+
+enum {
+ PROP_0,
+ PROP_FILL_COLOR,
+ PROP_FILL_COLOR_GDK,
+ PROP_FILL_COLOR_RGBA,
+};
+
+static void
+ecb_bounds (GnomeCanvasItem *item,
+ gdouble *x1,
+ gdouble *y1,
+ gdouble *x2,
+ gdouble *y2)
+{
+ *x1 = -G_MAXDOUBLE;
+ *y1 = -G_MAXDOUBLE;
+ *x2 = G_MAXDOUBLE;
+ *y2 = G_MAXDOUBLE;
+}
+
+static void
+ecb_update (GnomeCanvasItem *item,
+ const cairo_matrix_t *i2c,
+ gint flags)
+{
+ gdouble x1, y1, x2, y2;
+
+ x1 = item->x1;
+ y1 = item->y1;
+ x2 = item->x2;
+ y2 = item->y2;
+
+ /* The bounds are all constants so we should only have to
+ * redraw once. */
+ ecb_bounds (item, &item->x1, &item->y1, &item->x2, &item->y2);
+
+ if (item->x1 != x1 || item->y1 != y1 ||
+ item->x2 != x2 || item->y2 != y2)
+ gnome_canvas_request_redraw (
+ item->canvas, item->x1, item->y1, item->x2, item->y2);
+}
+
+static void
+ecb_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ ECanvasBackground *ecb;
+
+ GdkColor color = { 0, 0, 0, 0, };
+ GdkColor *pcolor;
+
+ ecb = E_CANVAS_BACKGROUND (object);
+
+ switch (property_id) {
+ case PROP_FILL_COLOR:
+ if (g_value_get_string (value))
+ gdk_color_parse (g_value_get_string (value), &color);
+
+ ecb->priv->rgba = ((color.red & 0xff00) << 16 |
+ (color.green & 0xff00) << 8 |
+ (color.blue & 0xff00) |
+ 0xff);
+ break;
+
+ case PROP_FILL_COLOR_GDK:
+ pcolor = g_value_get_boxed (value);
+ if (pcolor) {
+ color = *pcolor;
+ }
+
+ ecb->priv->rgba = ((color.red & 0xff00) << 16 |
+ (color.green & 0xff00) << 8 |
+ (color.blue & 0xff00) |
+ 0xff);
+ break;
+
+ case PROP_FILL_COLOR_RGBA:
+ ecb->priv->rgba = g_value_get_uint (value);
+ break;
+
+ }
+
+ gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (ecb));
+}
+
+static void
+ecb_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ ECanvasBackground *ecb;
+
+ ecb = E_CANVAS_BACKGROUND (object);
+
+ switch (property_id) {
+ case PROP_FILL_COLOR_RGBA:
+ g_value_set_uint (value, ecb->priv->rgba);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+ecb_init (ECanvasBackground *ecb)
+{
+ ecb->priv = E_CANVAS_BACKGROUND_GET_PRIVATE (ecb);
+}
+
+static void
+ecb_draw (GnomeCanvasItem *item,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ gint width,
+ gint height)
+{
+ ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+ cairo_save (cr);
+ cairo_set_source_rgba (
+ cr,
+ ((ecb->priv->rgba >> 24) & 0xff) / 255.0,
+ ((ecb->priv->rgba >> 16) & 0xff) / 255.0,
+ ((ecb->priv->rgba >> 8) & 0xff) / 255.0,
+ ( ecb->priv->rgba & 0xff) / 255.0);
+ cairo_paint (cr);
+ cairo_restore (cr);
+}
+
+static GnomeCanvasItem *
+ecb_point (GnomeCanvasItem *item,
+ gdouble x,
+ gdouble y,
+ gint cx,
+ gint cy)
+{
+ return item;
+}
+
+static void
+ecb_style_set (ECanvasBackground *ecb,
+ GtkStyle *previous_style)
+{
+ GnomeCanvasItem *item = GNOME_CANVAS_ITEM (ecb);
+
+ if (gtk_widget_get_realized (GTK_WIDGET (item->canvas)))
+ gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (ecb));
+}
+
+static void
+ecb_class_init (ECanvasBackgroundClass *ecb_class)
+{
+ GnomeCanvasItemClass *item_class = GNOME_CANVAS_ITEM_CLASS (ecb_class);
+ GObjectClass *object_class = G_OBJECT_CLASS (ecb_class);
+
+ g_type_class_add_private (ecb_class, sizeof (ECanvasBackgroundPrivate));
+
+ object_class->set_property = ecb_set_property;
+ object_class->get_property = ecb_get_property;
+
+ item_class->update = ecb_update;
+ item_class->draw = ecb_draw;
+ item_class->point = ecb_point;
+ item_class->bounds = ecb_bounds;
+
+ ecb_class->style_set = ecb_style_set;
+
+ g_object_class_install_property (
+ object_class,
+ PROP_FILL_COLOR,
+ g_param_spec_string (
+ "fill_color",
+ "Fill color",
+ "Fill color",
+ NULL,
+ G_PARAM_WRITABLE));
+
+ g_object_class_install_property (
+ object_class,
+ PROP_FILL_COLOR_GDK,
+ g_param_spec_boxed (
+ "fill_color_gdk",
+ "GDK fill color",
+ "GDK fill color",
+ GDK_TYPE_COLOR,
+ G_PARAM_WRITABLE));
+
+ g_object_class_install_property (
+ object_class,
+ PROP_FILL_COLOR_RGBA,
+ g_param_spec_uint (
+ "fill_color_rgba",
+ "GDK fill color",
+ "GDK fill color",
+ 0, G_MAXUINT, 0,
+ G_PARAM_READWRITE));
+
+ ecb_signals[STYLE_SET] = g_signal_new (
+ "style_set",
+ G_OBJECT_CLASS_TYPE (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (ECanvasBackgroundClass, style_set),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__OBJECT,
+ G_TYPE_NONE, 1,
+ GTK_TYPE_STYLE);
+}
+
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