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/* gtkcellrendererpixbuf.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include "gtkcellrendererpixbuf.h"
#include "gtkintl.h"
static void gtk_cell_renderer_pixbuf_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_pixbuf_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *celltext);
static void gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class);
static void gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
gint *width,
gint *height);
static void gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
guint flags);
enum {
PROP_ZERO,
PROP_PIXBUF
};
GtkType
gtk_cell_renderer_pixbuf_get_type (void)
{
static GtkType cell_pixbuf_type = 0;
if (!cell_pixbuf_type)
{
static const GTypeInfo cell_pixbuf_info =
{
sizeof (GtkCellRendererPixbufClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_cell_renderer_pixbuf_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkCellRendererPixbuf),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_cell_renderer_pixbuf_init,
};
cell_pixbuf_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererPixbuf", &cell_pixbuf_info, 0);
}
return cell_pixbuf_type;
}
static void
gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
{
}
static void
gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
cell_class->render = gtk_cell_renderer_pixbuf_render;
g_object_class_install_property (object_class,
PROP_PIXBUF,
g_param_spec_object ("pixbuf",
_("Pixbuf Object"),
_("The pixbuf to render."),
GDK_TYPE_PIXBUF,
G_PARAM_READABLE |
G_PARAM_WRITABLE));
}
static void
gtk_cell_renderer_pixbuf_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
switch (param_id)
{
case PROP_PIXBUF:
g_value_set_object (value,
cellpixbuf->pixbuf ? G_OBJECT (cellpixbuf->pixbuf) : NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_pixbuf_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GdkPixbuf *pixbuf;
GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
switch (param_id)
{
case PROP_PIXBUF:
pixbuf = (GdkPixbuf*) g_value_get_object (value);
if (pixbuf)
g_object_ref (G_OBJECT (pixbuf));
if (cellpixbuf->pixbuf)
g_object_unref (G_OBJECT (cellpixbuf->pixbuf));
cellpixbuf->pixbuf = pixbuf;
g_object_notify (object, "pixbuf");
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
/**
* gtk_cell_renderer_pixbuf_new:
*
* Creates a new #GtkCellRendererPixbuf. Adjust rendering
* parameters using object properties. Object properties can be set
* globally (with g_object_set()). Also, with #GtkTreeViewColumn, you
* can bind a property to a value in a #GtkTreeModel. For example, you
* can bind the "pixbuf" property on the cell renderer to a pixbuf value
* in the model, thus rendering a different image in each row of the
* #GtkTreeView.
*
* Return value: the new cell renderer
**/
GtkCellRenderer *
gtk_cell_renderer_pixbuf_new (void)
{
return GTK_CELL_RENDERER (gtk_type_new (gtk_cell_renderer_pixbuf_get_type ()));
}
static void
gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
gint *width,
gint *height)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
if (width)
*width = (gint) GTK_CELL_RENDERER (cellpixbuf)->xpad * 2 +
(cellpixbuf->pixbuf ? gdk_pixbuf_get_width (cellpixbuf->pixbuf) : 0);
if (height)
*height = (gint) GTK_CELL_RENDERER (cellpixbuf)->ypad * 2 +
(cellpixbuf->pixbuf ? gdk_pixbuf_get_height (cellpixbuf->pixbuf) : 0);
}
static void
gtk_cell_renderer_pixbuf_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
guint flags)
{
GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
GdkPixbuf *pixbuf;
guchar *pixels;
gint rowstride;
gint real_xoffset;
gint real_yoffset;
GdkRectangle pix_rect;
GdkRectangle draw_rect;
pixbuf = cellpixbuf->pixbuf;
if (!pixbuf)
return;
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
real_xoffset = GTK_CELL_RENDERER (cellpixbuf)->xalign * (cell_area->width - gdk_pixbuf_get_width (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->xpad));
real_xoffset = MAX (real_xoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->xpad;
real_yoffset = GTK_CELL_RENDERER (cellpixbuf)->yalign * (cell_area->height - gdk_pixbuf_get_height (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->ypad));
real_yoffset = MAX (real_yoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->ypad;
pix_rect.x = cell_area->x + real_xoffset;
pix_rect.y = cell_area->y + real_yoffset;
pix_rect.width = gdk_pixbuf_get_width (pixbuf);
pix_rect.height = gdk_pixbuf_get_height (pixbuf);
if (gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect))
gdk_pixbuf_render_to_drawable_alpha (pixbuf,
window,
/* pixbuf 0, 0 is at pix_rect.x, pix_rect.y */
draw_rect.x - pix_rect.x,
draw_rect.y - pix_rect.y,
draw_rect.x,
draw_rect.y,
draw_rect.width,
draw_rect.height,
GDK_PIXBUF_ALPHA_FULL,
0,
GDK_RGB_DITHER_NORMAL,
0, 0);
}
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