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eog-pixbuf-cell-renderer.c

/* Eye Of Gnome - Pixbuf Cellrenderer 
 *
 * Copyright (C) 2007 The GNOME Foundation
 *
 * Author: Lucas Rocha <lucasr@gnome.org>
 *
 * Based on gnome-control-center code (capplets/appearance/wp-cellrenderer.c) by: 
 *      - Denis Washington <denisw@svn.gnome.org>
 *      - Jens Granseuer <jensgr@gmx.net>
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "eog-pixbuf-cell-renderer.h"

#include <math.h>

G_DEFINE_TYPE (EogPixbufCellRenderer, eog_pixbuf_cell_renderer, GTK_TYPE_CELL_RENDERER_PIXBUF)

static void eog_pixbuf_cell_renderer_render (GtkCellRenderer *cell,
                                             GdkWindow *window,
                                             GtkWidget *widget,
                                             GdkRectangle *background_area,
                                             GdkRectangle *cell_area,
                                             GdkRectangle *expose_area,
                                             GtkCellRendererState flags);

static void
eog_pixbuf_cell_renderer_class_init (EogPixbufCellRendererClass *klass)
{
      GtkCellRendererClass *renderer_class;
      
      renderer_class = (GtkCellRendererClass *) klass;
      renderer_class->render = eog_pixbuf_cell_renderer_render;
}

static void
eog_pixbuf_cell_renderer_init (EogPixbufCellRenderer *renderer)
{
}

GtkCellRenderer *
eog_pixbuf_cell_renderer_new (void)
{
      return g_object_new (eog_pixbuf_cell_renderer_get_type (), NULL);
}

static void
eog_pixbuf_cell_renderer_render (GtkCellRenderer *cell,
                                 GdkWindow *window,
                                 GtkWidget *widget,
                                 GdkRectangle *background_area,
                                 GdkRectangle *cell_area,
                                 GdkRectangle *expose_area,
                                 GtkCellRendererState flags)
{
      if ((flags & (GTK_CELL_RENDERER_SELECTED|GTK_CELL_RENDERER_PRELIT)) != 0) {
            cairo_t *cr;
            gint radius = 5;
            gint x, y, w, h;
            GtkStateType state;

            x = background_area->x;
            y = background_area->y;
            w = background_area->width;
            h = background_area->height;
            
            /* Sometimes width is -1 - not sure what to do here */
            if (w == -1) return;
            
            if ((flags & GTK_CELL_RENDERER_SELECTED) != 0) {
                  if (GTK_WIDGET_HAS_FOCUS (widget))
                        state = GTK_STATE_SELECTED;
                  else
                        state = GTK_STATE_ACTIVE;
            } else
                  state = GTK_STATE_PRELIGHT;

            /* draw the selection indicator */
            cr = gdk_cairo_create (GDK_DRAWABLE (window));
            gdk_cairo_set_source_color (cr, &widget->style->base[state]);
            
            cairo_arc (cr, x + radius, y + radius, radius, M_PI, M_PI * 1.5);
            cairo_arc (cr, x + w - radius, y + radius, radius, M_PI * 1.5, 0);
            cairo_arc (cr, x + w - radius, y + h - radius, radius, 0, M_PI * 0.5);
            cairo_arc (cr, x + radius, y + h - radius, radius, M_PI * 0.5, M_PI);
            cairo_close_path (cr);
            
            /* FIXME: this should not be hardcoded to 4 */
            cairo_rectangle (cr, x + 4, y + 4, w - 8, h - 8);
            
            /*cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);*/
            cairo_fill (cr);
            cairo_destroy (cr);
      }

      (* GTK_CELL_RENDERER_CLASS (eog_pixbuf_cell_renderer_parent_class)->render)
          (cell, window, widget, background_area, cell_area, expose_area, flags);
}

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