cellrenderer-cairo-1.0.0.0: c-exts/gtkcellrenderercairo.c
/* gtkcellrenderercairo.c
* Copyright (C) 2000 Tsuru Capital
*
* 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 <cairo/cairo.h>
#include "gtkcellrenderercairo.h"
static void gtk_cell_renderer_cairo_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_cairo_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_cairo_finalize (GObject *object);
static void gtk_cell_renderer_cairo_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void gtk_cell_renderer_cairo_render (GtkCellRenderer *cell,
GdkDrawable *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags);
enum {
PROP_0,
PROP_CELL_RENDERER,
};
G_DEFINE_TYPE (GtkCellRendererCairo, gtk_cell_renderer_cairo, GTK_TYPE_CELL_RENDERER)
static void
gtk_cell_renderer_cairo_init (GtkCellRendererCairo *cellcairo)
{
/* in pixbuf, this initialized a private struct. Don't know yet if we'll
* need it here
*/
}
static void
gtk_cell_renderer_cairo_class_init (GtkCellRendererCairoClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
object_class->finalize = gtk_cell_renderer_cairo_finalize;
object_class->get_property = gtk_cell_renderer_cairo_get_property;
object_class->set_property = gtk_cell_renderer_cairo_set_property;
cell_class->get_size = gtk_cell_renderer_cairo_get_size;
cell_class->render = gtk_cell_renderer_cairo_render;
g_object_class_install_property (object_class,
PROP_CELL_RENDERER,
g_param_spec_pointer ("cellRenderer",
"Cell rendering function",
"The callback function used to render a cell",
G_PARAM_READWRITE));
}
static void
gtk_cell_renderer_cairo_finalize (GObject *object)
{
GtkCellRendererCairo *cellcairo = GTK_CELL_RENDERER_CAIRO (object);
if (cellcairo->cairo_render)
g_closure_unref (cellcairo->cairo_render);
G_OBJECT_CLASS (gtk_cell_renderer_cairo_parent_class)->finalize (object);
}
static void
gtk_cell_renderer_cairo_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRendererCairo *cellcairo = GTK_CELL_RENDERER_CAIRO (object);
switch (param_id)
{
case PROP_CELL_RENDERER:
g_value_set_object (value, cellcairo->cairo_render);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_cairo_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRendererCairo *cellcairo = GTK_CELL_RENDERER_CAIRO (object);
switch (param_id)
{
case PROP_CELL_RENDERER:
if (cellcairo->cairo_render)
g_closure_unref (cellcairo->cairo_render);
cellcairo->cairo_render = (GClosure*) g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
void gtk_cell_renderer_cairo_set_cell_renderer(
GtkCellRendererCairo *cellcairo,
GClosure *renderer)
{
if (cellcairo)
{
if (cellcairo->cairo_render)
g_closure_unref (cellcairo->cairo_render);
cellcairo->cairo_render = g_closure_ref(renderer);
}
}
/**
* gtk_cell_renderer_cairo_new:
*
* Creates a new #GtkCellRendererCairo. 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.
*
* Return value: the new cell renderer
**/
GtkCellRenderer *
gtk_cell_renderer_cairo_new (void)
{
GtkCellRenderer *cellcairo;
cellcairo = g_object_new (GTK_TYPE_CELL_RENDERER_CAIRO, NULL);
return cellcairo;
}
static void
gtk_cell_renderer_cairo_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GtkCellRendererCairo *cellcairo = (GtkCellRendererCairo *) cell;
if (cell_area)
{
if (x_offset)
{
*x_offset = cell->xalign * cell->xpad;
*x_offset = MAX (*x_offset, 0);
}
if (y_offset)
{
*y_offset = cell->yalign * cell->ypad;
*y_offset = MAX (*y_offset, 0);
}
if (width)
*width = cell_area->x - cell->xpad * 2;
if (height)
*height = cell_area->y - cell->ypad *2;
}
else
{
if (x_offset) *x_offset = 0;
if (y_offset) *y_offset = 0;
if (width) *width = 0;
if (height) *height = 0;
}
}
static void
gtk_cell_renderer_cairo_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags)
{
GtkCellRendererCairo *cellcairo = (GtkCellRendererCairo *) cell;
GClosure *render_function;
GdkRectangle draw_rect;
GValue cairo_args[5] = { { 0, }, { 0, }, { 0, }, { 0, }, { 0, } };
GValue *arg1;
GValue *arg;
cairo_t *cr;
int ix;
cairo_status_t stat;
arg1 = cairo_args;
draw_rect = *cell_area;
if ( !gdk_rectangle_intersect (expose_area, &draw_rect, &draw_rect))
return;
render_function = cellcairo->cairo_render;
if (!render_function)
return;
cr = gdk_cairo_create (window);
g_value_init(arg1, G_TYPE_POINTER);
g_assert (G_VALUE_HOLDS(arg1, G_TYPE_POINTER));
g_value_set_pointer(arg1, (gpointer) cr);
arg=cairo_args+1;
g_value_init(arg, G_TYPE_INT);
g_assert (G_VALUE_HOLDS(arg, G_TYPE_INT));
g_value_set_int(arg, draw_rect.x);
arg++;
g_value_init(arg, G_TYPE_INT);
g_assert (G_VALUE_HOLDS(arg, G_TYPE_INT));
g_value_set_int(arg, draw_rect.y);
arg++;
g_value_init(arg, G_TYPE_INT);
g_assert (G_VALUE_HOLDS(arg, G_TYPE_INT));
g_value_set_int(arg, draw_rect.width);
arg++;
g_value_init(arg, G_TYPE_INT);
g_assert (G_VALUE_HOLDS(arg, G_TYPE_INT));
g_value_set_int(arg, draw_rect.height);
g_closure_invoke(render_function, NULL,5, cairo_args, NULL);
for(ix=4;ix>=0;ix--)
{
g_value_unset(cairo_args+ix);
}
cairo_destroy (cr);
}
#define __GTK_CELL_RENDERER_CAIRO_C__