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
  23 #ifndef _
  24 #define _(x) x
  25 #endif
  26
  27
  28 static void gtk_cell_renderer_pixbuf_get_property  (GObject                    *object,
  29                                                     guint                       param_id,
  30                                                     GValue                     *value,
  31                                                     GParamSpec                 *pspec,
  32                                                     const gchar                *trailer);
  33 static void gtk_cell_renderer_pixbuf_set_property  (GObject                    *object,
  34                                                     guint                       param_id,
  35                                                     const GValue               *value,
  36                                                     GParamSpec                 *pspec,
  37                                                     const gchar                *trailer);
  38 static void gtk_cell_renderer_pixbuf_init       (GtkCellRendererPixbuf      *celltext);
  39 static void gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class);
  40 static void gtk_cell_renderer_pixbuf_get_size   (GtkCellRenderer            *cell,
  41                                                  GtkWidget                  *widget,
  42                                                  gint                       *width,
  43                                                  gint                       *height);
  44 static void gtk_cell_renderer_pixbuf_render     (GtkCellRenderer            *cell,
  45                                                  GdkWindow                  *window,
  46                                                  GtkWidget                  *widget,
  47                                                  GdkRectangle               *background_area,
  48                                                  GdkRectangle               *cell_area,
  49                                                  GdkRectangle               *expose_area,
  50                                                  guint                       flags);
  51
  52
  53 enum {
  54         PROP_ZERO,
  55         PROP_PIXBUF
  56 };
  57
  58
  59 GtkType
  60 gtk_cell_renderer_pixbuf_get_type (void)
  61 {
  62         static GtkType cell_pixbuf_type = 0;
  63
  64         if (!cell_pixbuf_type)
  65         {
  66                 static const GTypeInfo cell_pixbuf_info =
  67                 {
  68                         sizeof (GtkCellRendererPixbufClass),
  69                         NULL,           /* base_init */
  70                         NULL,           /* base_finalize */
  71                         (GClassInitFunc) gtk_cell_renderer_pixbuf_class_init,
  72                         NULL,           /* class_finalize */
  73                         NULL,           /* class_data */
  74                         sizeof (GtkCellRendererPixbuf),
  75                         0,              /* n_preallocs */
  76                         (GInstanceInitFunc) gtk_cell_renderer_pixbuf_init,
  77                 };
  78
  79                 cell_pixbuf_type = g_type_register_static (GTK_TYPE_CELL_RENDERER, "GtkCellRendererPixbuf", &cell_pixbuf_info, 0);
  80         }
  81
  82         return cell_pixbuf_type;
  83 }
  84
  85 static void
  86 gtk_cell_renderer_pixbuf_init (GtkCellRendererPixbuf *cellpixbuf)
  87 {
  88 }
  89
  90 static void
  91 gtk_cell_renderer_pixbuf_class_init (GtkCellRendererPixbufClass *class)
  92 {
  93         GObjectClass *object_class = G_OBJECT_CLASS (class);
  94         GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (class);
  95
  96         object_class->get_property = gtk_cell_renderer_pixbuf_get_property;
  97         object_class->set_property = gtk_cell_renderer_pixbuf_set_property;
  98
  99         cell_class->get_size = gtk_cell_renderer_pixbuf_get_size;
 100         cell_class->render = gtk_cell_renderer_pixbuf_render;
 101
 102         g_object_class_install_property (object_class,
 103                                          PROP_PIXBUF,
 104                                          g_param_spec_object ("pixbuf",
 105                                                               _("Pixbuf Object"),
 106                                                               _("The pixbuf to render."),
 107                                                               GDK_TYPE_PIXBUF,
 108                                                               G_PARAM_READABLE |
 109                                                               G_PARAM_WRITABLE));
 110 }
 111
 112 static void
 113 gtk_cell_renderer_pixbuf_get_property (GObject        *object,
 114                                        guint           param_id,
 115                                        GValue         *value,
 116                                        GParamSpec     *pspec,
 117                                        const gchar    *trailer)
 118 {
 119   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 120
 121   switch (param_id)
 122     {
 123     case PROP_PIXBUF:
 124       g_value_init (value, G_TYPE_OBJECT);
 125       g_value_set_object (value, G_OBJECT (cellpixbuf->pixbuf));
 126       break;
 127     default:
 128       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 129       break;
 130     }
 131 }
 132
 133
 134 static void
 135 gtk_cell_renderer_pixbuf_set_property (GObject      *object,
 136                                        guint         param_id,
 137                                        const GValue *value,
 138                                        GParamSpec   *pspec,
 139                                        const gchar  *trailer)
 140 {
 141   GdkPixbuf *pixbuf;
 142   GtkCellRendererPixbuf *cellpixbuf = GTK_CELL_RENDERER_PIXBUF (object);
 143
 144   switch (param_id)
 145     {
 146     case PROP_PIXBUF:
 147       pixbuf = GDK_PIXBUF (g_value_get_object (value));
 148       g_object_ref (G_OBJECT (pixbuf));
 149       if (cellpixbuf->pixbuf)
 150         g_object_unref (G_OBJECT (cellpixbuf->pixbuf));
 151       cellpixbuf->pixbuf = pixbuf;
 152       break;
 153     default:
 154       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 155       break;
 156     }
 157 }
 158
 159 GtkCellRenderer *
 160 gtk_cell_renderer_pixbuf_new (void)
 161 {
 162         return GTK_CELL_RENDERER (gtk_type_new (gtk_cell_renderer_pixbuf_get_type ()));
 163 }
 164
 165 static void
 166 gtk_cell_renderer_pixbuf_get_size (GtkCellRenderer *cell,
 167                                    GtkWidget       *widget,
 168                                    gint            *width,
 169                                    gint            *height)
 170 {
 171         GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 172
 173         if (width)
 174                 *width = (gint) GTK_CELL_RENDERER (cellpixbuf)->xpad * 2 +
 175                         (cellpixbuf->pixbuf ? gdk_pixbuf_get_width (cellpixbuf->pixbuf) : 0);
 176
 177         if (height)
 178                 *height = (gint) GTK_CELL_RENDERER (cellpixbuf)->ypad * 2 +
 179                         (cellpixbuf->pixbuf ? gdk_pixbuf_get_height (cellpixbuf->pixbuf) : 0);
 180 }
 181
 182 static void
 183 gtk_cell_renderer_pixbuf_render (GtkCellRenderer    *cell,
 184                                  GdkWindow          *window,
 185                                  GtkWidget          *widget,
 186                                  GdkRectangle       *background_area,
 187                                  GdkRectangle       *cell_area,
 188                                  GdkRectangle       *expose_area,
 189                                  guint               flags)
 190
 191 {
 192         GtkCellRendererPixbuf *cellpixbuf = (GtkCellRendererPixbuf *) cell;
 193         GdkPixbuf *pixbuf;
 194         guchar *pixels;
 195         gint rowstride;
 196         gint real_xoffset;
 197         gint real_yoffset;
 198         GdkGC *bg_gc = NULL;
 199
 200         pixbuf = cellpixbuf->pixbuf;
 201
 202         if (!pixbuf)
 203                 return;
 204
 205         if ((flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED)
 206                 bg_gc = widget->style->bg_gc [GTK_STATE_SELECTED];
 207         else
 208                 bg_gc = widget->style->base_gc [GTK_STATE_NORMAL];
 209
 210         gdk_gc_set_clip_rectangle (bg_gc, cell_area);
 211
 212         rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 213         pixels = gdk_pixbuf_get_pixels (pixbuf);
 214
 215         real_xoffset = GTK_CELL_RENDERER (cellpixbuf)->xalign * (cell_area->width - gdk_pixbuf_get_width (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->xpad));
 216         real_xoffset = MAX (real_xoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->xpad;
 217         real_yoffset = GTK_CELL_RENDERER (cellpixbuf)->yalign * (cell_area->height - gdk_pixbuf_get_height (pixbuf) - (2 * GTK_CELL_RENDERER (cellpixbuf)->ypad));
 218         real_yoffset = MAX (real_yoffset, 0) + GTK_CELL_RENDERER (cellpixbuf)->ypad;
 219
 220         if (gdk_pixbuf_get_has_alpha (pixbuf))
 221                 gdk_draw_rgb_32_image (window,
 222                                        bg_gc,
 223                                        cell_area->x + real_xoffset,
 224                                        cell_area->y + real_yoffset,
 225                                        gdk_pixbuf_get_width (pixbuf),
 226                                        gdk_pixbuf_get_height (pixbuf),
 227                                        GDK_RGB_DITHER_NORMAL,
 228                                        pixels,
 229                                        rowstride);
 230         else
 231                 gdk_draw_rgb_image (window,
 232                                     bg_gc,
 233                                     cell_area->x + real_xoffset,
 234                                     cell_area->y + real_yoffset,
 235                                     gdk_pixbuf_get_width (pixbuf),
 236                                     gdk_pixbuf_get_height (pixbuf),
 237                                     GDK_RGB_DITHER_NORMAL,
 238                                     pixels,
 239                                     rowstride);
 240
 241         gdk_gc_set_clip_rectangle (bg_gc, NULL);
 242 }