Pileus Git - ~andy/gtk/blob - gtk/gtkcellrendererpixbuf.c

   1 /* gtkcellrendererpixbuf.c
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <stdlib.h>
  21 #include "gtkcellrendererpixbuf.h"
  22 #include "gtkintl.h"
  23
  24 static void gtk_cell_renderer_pixbuf_get_property  (GObject                    *object,
  25                                                     guint                       param_id,
  26                                                     GValue                     *value,
  27                                                     GParamSpec                 *pspec,
  28                                                     const gchar                *trailer);
  29 static void gtk_cell_renderer_pixbuf_set_property  (GObject                    *object,
  30                                                     guint                       param_id,
  31                                                     const GValue               *value,
  32                                                     GParamSpec                 *pspec,
  33                                                     const gchar                *trailer);
  34 static void gtk_cell_renderer_pixbuf_init       (GtkCellRendererPixbuf      *celltext);
  35 static void gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class);
  36 static void gtk_cell_renderer_pixbuf_get_size   (GtkCellRenderer            *cell,
  37                                                  GtkWidget                  *widget,
  38                                                  gint                       *width,
  39                                                  gint                       *height);
  40 static void gtk_cell_renderer_pixbuf_render     (GtkCellRenderer            *cell,
  41                                                  GdkWindow                  *window,
  42                                                  GtkWidget                  *widget,
  43                                                  GdkRectangle               *background_area,
  44                                                  GdkRectangle               *cell_area,
  45                                                  GdkRectangle               *expose_area,
  46                                                  guint                       flags);
  47
  48
  49 enum {
  50         PROP_ZERO,
  51         PROP_PIXBUF
  52 };
  53
  54
  55 GtkType
  56 gtk_cell_renderer_pixbuf_get_type (void)
  57 {
  58         static GtkType cell_pixbuf_type = 0;
  59
  60         if (!cell_pixbuf_type)
  61         {
  62                 static const GTypeInfo cell_pixbuf_info =
  63                 {
  64                         sizeof (GtkCellRendererPixbufClass),
  65                         NULL,           /* base_init */
  66                         NULL,           /* base_finalize */
  67                         (GClassInitFunc) gtk_cell_renderer_pixbuf_class_init,
  68                         NULL,           /* class_finalize */
  69                         NULL,           /* class_data */
  70                         sizeof (GtkCellRendererPixbuf),
  71                         0,              /* n_preallocs */
  72                         (GInstanceInitFunc) gtk_cell_renderer_pixbuf_init,
  73                 };
  74
  75                 cell_pixbuf_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererPixbuf", &cell_pixbuf_info, 0);
  76         }
  77
  78         return cell_pixbuf_type;
  79 }
  80
  81 static void
  82 gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
  83 {
  84 }
  85
  86 static void
  87 gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
  88 {
  89         GObjectClass *object_class = G_OBJECT_CLASS (class);
  90         GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
  91
  92         object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
  93         object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
  94
  95         cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
  96         cell_class->render = gtk_cell_renderer_pixbuf_render;
  97
  98         g_object_class_install_property (object_class,
  99                                          PROP_PIXBUF,
 100                                          g_param_spec_object ("pixbuf",
 101                                                               _("Pixbuf Object"),
 102                                                               _("The pixbuf to render."),
 103                                                               GDK_TYPE_PIXBUF,
 104                                                               G_PARAM_READABLE |
 105                                                               G_PARAM_WRITABLE));
 106 }
 107
 108 static void
 109 gtk_cell_renderer_pixbuf_get_property (GObject        *object,
 110                                        guint           param_id,
 111                                        GValue         *value,
 112                                        GParamSpec     *pspec,
 113                                        const gchar    *trailer)
 114 {
 115   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 116
 117   switch (param_id)
 118     {
 119     case PROP_PIXBUF:
 120       g_value_set_object (value, G_OBJECT (cellpixbuf->pixbuf));
 121       break;
 122     default:
 123       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 124       break;
 125     }
 126 }
 127
 128
 129 static void
 130 gtk_cell_renderer_pixbuf_set_property (GObject      *object,
 131                                        guint         param_id,
 132                                        const GValue *value,
 133                                        GParamSpec   *pspec,
 134                                        const gchar  *trailer)
 135 {
 136   GdkPixbuf *pixbuf;
 137   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 138
 139   switch (param_id)
 140     {
 141     case PROP_PIXBUF:
 142       pixbuf = GDK_PIXBUF (g_value_get_object (value));
 143       g_object_ref (G_OBJECT (pixbuf));
 144       if (cellpixbuf->pixbuf)
 145         g_object_unref (G_OBJECT (cellpixbuf->pixbuf));
 146       cellpixbuf->pixbuf = pixbuf;
 147       break;
 148     default:
 149       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 150       break;
 151     }
 152 }
 153
 154 GtkCellRenderer *
 155 gtk_cell_renderer_pixbuf_new (void)
 156 {
 157         return GTK_CELL_RENDERER (gtk_type_new (gtk_cell_renderer_pixbuf_get_type ()));
 158 }
 159
 160 static void
 161 gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
 162                                    GtkWidget       *widget,
 163                                    gint            *width,
 164                                    gint            *height)
 165 {
 166         GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 167
 168         if (width)
 169                 *width = (gint) GTK_CELL_RENDERER (cellpixbuf)->xpad * 2 +
 170                         (cellpixbuf->pixbuf ? gdk_pixbuf_get_width (cellpixbuf->pixbuf) : 0);
 171
 172         if (height)
 173                 *height = (gint) GTK_CELL_RENDERER (cellpixbuf)->ypad * 2 +
 174                         (cellpixbuf->pixbuf ? gdk_pixbuf_get_height (cellpixbuf->pixbuf) : 0);
 175 }
 176
 177 static void
 178 gtk_cell_renderer_pixbuf_render (GtkCellRenderer    *cell,
 179                                  GdkWindow          *window,
 180                                  GtkWidget          *widget,
 181                                  GdkRectangle       *background_area,
 182                                  GdkRectangle       *cell_area,
 183                                  GdkRectangle       *expose_area,
 184                                  guint               flags)
 185
 186 {
 187         GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 188         GdkPixbuf *pixbuf;
 189         guchar *pixels;
 190         gint rowstride;
 191         gint real_xoffset;
 192         gint real_yoffset;
 193         GdkGC *bg_gc = NULL;
 194
 195         pixbuf = cellpixbuf->pixbuf;
 196
 197         if (!pixbuf)
 198                 return;
 199
 200         if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
 201                 bg_gc = widget->style->bg_gc [GTK_STATE_SELECTED];
 202         else
 203                 bg_gc = widget->style->base_gc [GTK_STATE_NORMAL];
 204
 205         gdk_gc_set_clip_rectangle (bg_gc, cell_area);
 206
 207         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 208         pixels = gdk_pixbuf_get_pixels (pixbuf);
 209
 210         real_xoffset = GTK_CELL_RENDERER (cellpixbuf)->xalign * (cell_area->width - gdk_pixbuf_get_width (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->xpad));
 211         real_xoffset = MAX (real_xoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->xpad;
 212         real_yoffset = GTK_CELL_RENDERER (cellpixbuf)->yalign * (cell_area->height - gdk_pixbuf_get_height (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->ypad));
 213         real_yoffset = MAX (real_yoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->ypad;
 214
 215         if (gdk_pixbuf_get_has_alpha (pixbuf))
 216                 gdk_draw_rgb_32_image (window,
 217                                        bg_gc,
 218                                        cell_area->x + real_xoffset,
 219                                        cell_area->y + real_yoffset,
 220                                        gdk_pixbuf_get_width (pixbuf),
 221                                        gdk_pixbuf_get_height (pixbuf),
 222                                        GDK_RGB_DITHER_NORMAL,
 223                                        pixels,
 224                                        rowstride);
 225         else
 226                 gdk_draw_rgb_image (window,
 227                                     bg_gc,
 228                                     cell_area->x + real_xoffset,
 229                                     cell_area->y + real_yoffset,
 230                                     gdk_pixbuf_get_width (pixbuf),
 231                                     gdk_pixbuf_get_height (pixbuf),
 232                                     GDK_RGB_DITHER_NORMAL,
 233                                     pixels,
 234                                     rowstride);
 235
 236         gdk_gc_set_clip_rectangle (bg_gc, NULL);
 237 }