/*
* 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 <math.h>
#include <stdio.h>
#include <string.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include "e-util/e-util.h"
#include "misc/e-canvas.h"
#include "misc/e-canvas-utils.h"
#include "misc/e-hsv-utils.h"
#include "e-canvas-background.h"
/* 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_dispose (GObject *object)
{
ECanvasBackground *ecb = E_CANVAS_BACKGROUND (object);
if (ecb->priv) {
g_free (ecb->priv);
ecb->priv = NULL;
}
/* Chain up to parent's dispose() method. */
G_OBJECT_CLASS (ecb_parent_class)->dispose (object);
}
static void
ecb_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ECanvasBackground *ecb;
GdkColor color = { 0, 0, 0, 0, };
GdkColor *pcolor;
ecb = E_CANVAS_BACKGROUND (object);
switch (prop_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 prop_id,
GValue *value,
GParamSpec *pspec)
{
ECanvasBackground *ecb;
ecb = E_CANVAS_BACKGROUND (object);
switch (prop_id) {
case PROP_FILL_COLOR_RGBA:
g_value_set_uint (value, ecb->priv->rgba);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
ecb_init (ECanvasBackground *ecb)
{
ecb->priv = g_new (ECanvasBackgroundPrivate, 1);
}
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);
object_class->dispose = ecb_dispose;
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);
}