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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * Insensitive pixmap building code by Eckehard Berns from GNOME Stock
   5  * Copyright (C) 1997, 1998 Free Software Foundation
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  25  * file for a list of people on the GTK+ Team.  See the ChangeLog
  26  * files for a list of changes.  These files are distributed with
  27  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  28  */
  29
  30 #undef GDK_DISABLE_DEPRECATED
  31 #undef GTK_DISABLE_DEPRECATED
  32
  33 #include "config.h"
  34 #include <math.h>
  35 #include "gtkcontainer.h"
  36 #include "gtkpixmap.h"
  37 #include "gtkintl.h"
  38
  39 #define GTK_DISABLE_DEPRECATED
  40 #include "gtkalias.h"
  41
  42
  43 static gint gtk_pixmap_expose     (GtkWidget       *widget,
  44                                    GdkEventExpose  *event);
  45 static void gtk_pixmap_finalize   (GObject         *object);
  46 static void build_insensitive_pixmap (GtkPixmap *gtkpixmap);
  47
  48 G_DEFINE_TYPE (GtkPixmap, gtk_pixmap, GTK_TYPE_MISC)
  49
  50 static void
  51 gtk_pixmap_class_init (GtkPixmapClass *class)
  52 {
  53   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  54   GtkWidgetClass *widget_class;
  55
  56   widget_class = (GtkWidgetClass*) class;
  57
  58   gobject_class->finalize = gtk_pixmap_finalize;
  59
  60   widget_class->expose_event = gtk_pixmap_expose;
  61 }
  62
  63 static void
  64 gtk_pixmap_init (GtkPixmap *pixmap)
  65 {
  66   GTK_WIDGET_SET_FLAGS (pixmap, GTK_NO_WINDOW);
  67
  68   pixmap->pixmap = NULL;
  69   pixmap->mask = NULL;
  70 }
  71
  72 GtkWidget*
  73 gtk_pixmap_new (GdkPixmap *val,
  74                 GdkBitmap *mask)
  75 {
  76   GtkPixmap *pixmap;
  77
  78   g_return_val_if_fail (val != NULL, NULL);
  79
  80   pixmap = gtk_type_new (gtk_pixmap_get_type ());
  81
  82   pixmap->build_insensitive = TRUE;
  83   gtk_pixmap_set (pixmap, val, mask);
  84
  85   return GTK_WIDGET (pixmap);
  86 }
  87
  88 static void
  89 gtk_pixmap_finalize (GObject *object)
  90 {
  91   gtk_pixmap_set (GTK_PIXMAP (object), NULL, NULL);
  92
  93   G_OBJECT_CLASS (gtk_pixmap_parent_class)->finalize (object);
  94 }
  95
  96 void
  97 gtk_pixmap_set (GtkPixmap *pixmap,
  98                 GdkPixmap *val,
  99                 GdkBitmap *mask)
 100 {
 101   gint width;
 102   gint height;
 103   gint oldwidth;
 104   gint oldheight;
 105
 106   g_return_if_fail (GTK_IS_PIXMAP (pixmap));
 107   if(GDK_IS_DRAWABLE(val))
 108     g_return_if_fail (gdk_colormap_get_visual (gtk_widget_get_colormap (GTK_WIDGET (pixmap)))->depth == gdk_drawable_get_depth (GDK_DRAWABLE (val)));
 109
 110   if (pixmap->pixmap != val)
 111     {
 112       oldwidth = GTK_WIDGET (pixmap)->requisition.width;
 113       oldheight = GTK_WIDGET (pixmap)->requisition.height;
 114       if (pixmap->pixmap)
 115         gdk_pixmap_unref (pixmap->pixmap);
 116       if (pixmap->pixmap_insensitive)
 117         gdk_pixmap_unref (pixmap->pixmap_insensitive);
 118       pixmap->pixmap = val;
 119       pixmap->pixmap_insensitive = NULL;
 120       if (pixmap->pixmap)
 121         {
 122           gdk_pixmap_ref (pixmap->pixmap);
 123           gdk_window_get_size (pixmap->pixmap, &width, &height);
 124           GTK_WIDGET (pixmap)->requisition.width =
 125             width + GTK_MISC (pixmap)->xpad * 2;
 126           GTK_WIDGET (pixmap)->requisition.height =
 127             height + GTK_MISC (pixmap)->ypad * 2;
 128         }
 129       else
 130         {
 131           GTK_WIDGET (pixmap)->requisition.width = 0;
 132           GTK_WIDGET (pixmap)->requisition.height = 0;
 133         }
 134       if (GTK_WIDGET_VISIBLE (pixmap))
 135         {
 136           if ((GTK_WIDGET (pixmap)->requisition.width != oldwidth) ||
 137               (GTK_WIDGET (pixmap)->requisition.height != oldheight))
 138             gtk_widget_queue_resize (GTK_WIDGET (pixmap));
 139           else
 140             gtk_widget_queue_clear (GTK_WIDGET (pixmap));
 141         }
 142     }
 143
 144   if (pixmap->mask != mask)
 145     {
 146       if (pixmap->mask)
 147         gdk_bitmap_unref (pixmap->mask);
 148       pixmap->mask = mask;
 149       if (pixmap->mask)
 150         gdk_bitmap_ref (pixmap->mask);
 151     }
 152 }
 153
 154 void
 155 gtk_pixmap_get (GtkPixmap  *pixmap,
 156                 GdkPixmap **val,
 157                 GdkBitmap **mask)
 158 {
 159   g_return_if_fail (GTK_IS_PIXMAP (pixmap));
 160
 161   if (val)
 162     *val = pixmap->pixmap;
 163   if (mask)
 164     *mask = pixmap->mask;
 165 }
 166
 167 static gint
 168 gtk_pixmap_expose (GtkWidget      *widget,
 169                    GdkEventExpose *event)
 170 {
 171   GtkPixmap *pixmap;
 172   GtkMisc *misc;
 173   gint x, y;
 174   gfloat xalign;
 175
 176   g_return_val_if_fail (GTK_IS_PIXMAP (widget), FALSE);
 177   g_return_val_if_fail (event != NULL, FALSE);
 178
 179   if (GTK_WIDGET_DRAWABLE (widget))
 180     {
 181       pixmap = GTK_PIXMAP (widget);
 182       misc = GTK_MISC (widget);
 183
 184       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 185         xalign = misc->xalign;
 186       else
 187         xalign = 1.0 - misc->xalign;
 188
 189       x = floor (widget->allocation.x + misc->xpad
 190                  + ((widget->allocation.width - widget->requisition.width) * xalign));
 191       y = floor (widget->allocation.y + misc->ypad
 192                  + ((widget->allocation.height - widget->requisition.height) * misc->yalign));
 193
 194       if (pixmap->mask)
 195         {
 196           gdk_gc_set_clip_mask (widget->style->black_gc, pixmap->mask);
 197           gdk_gc_set_clip_origin (widget->style->black_gc, x, y);
 198         }
 199
 200       if (GTK_WIDGET_STATE (widget) == GTK_STATE_INSENSITIVE
 201           && pixmap->build_insensitive)
 202         {
 203           if (!pixmap->pixmap_insensitive)
 204             build_insensitive_pixmap (pixmap);
 205           gdk_draw_pixmap (widget->window,
 206                            widget->style->black_gc,
 207                            pixmap->pixmap_insensitive,
 208                            0, 0, x, y, -1, -1);
 209         }
 210       else
 211         {
 212           gdk_draw_pixmap (widget->window,
 213                            widget->style->black_gc,
 214                            pixmap->pixmap,
 215                            0, 0, x, y, -1, -1);
 216         }
 217
 218       if (pixmap->mask)
 219         {
 220           gdk_gc_set_clip_mask (widget->style->black_gc, NULL);
 221           gdk_gc_set_clip_origin (widget->style->black_gc, 0, 0);
 222         }
 223     }
 224   return FALSE;
 225 }
 226
 227 void
 228 gtk_pixmap_set_build_insensitive (GtkPixmap *pixmap, gboolean build)
 229 {
 230   g_return_if_fail (GTK_IS_PIXMAP (pixmap));
 231
 232   pixmap->build_insensitive = build;
 233
 234   if (GTK_WIDGET_VISIBLE (pixmap))
 235     {
 236       gtk_widget_queue_clear (GTK_WIDGET (pixmap));
 237     }
 238 }
 239
 240 static void
 241 build_insensitive_pixmap (GtkPixmap *gtkpixmap)
 242 {
 243   GdkPixmap *pixmap = gtkpixmap->pixmap;
 244   GdkPixmap *insensitive;
 245   gint w, h;
 246   GdkPixbuf *pixbuf;
 247   GdkPixbuf *stated;
 248
 249   gdk_window_get_size (pixmap, &w, &h);
 250
 251   pixbuf = gdk_pixbuf_get_from_drawable (NULL,
 252                                          pixmap,
 253                                          gtk_widget_get_colormap (GTK_WIDGET (gtkpixmap)),
 254                                          0, 0,
 255                                          0, 0,
 256                                          w, h);
 257
 258   stated = gdk_pixbuf_copy (pixbuf);
 259
 260   gdk_pixbuf_saturate_and_pixelate (pixbuf, stated,
 261                                     0.8, TRUE);
 262
 263   g_object_unref (G_OBJECT (pixbuf));
 264   pixbuf = NULL;
 265
 266   insensitive = gdk_pixmap_new (GTK_WIDGET (gtkpixmap)->window, w, h, -1);
 267
 268   gdk_draw_pixbuf (insensitive,
 269                    GTK_WIDGET (gtkpixmap)->style->white_gc,
 270                    stated,
 271                    0, 0,
 272                    0, 0,
 273                    w, h,
 274                    GDK_RGB_DITHER_NORMAL,
 275                    0, 0);
 276
 277   gtkpixmap->pixmap_insensitive = insensitive;
 278
 279   g_object_unref (G_OBJECT (stated));
 280 }
 281
 282 #define __GTK_PIXMAP_C__
 283 #include "gtkaliasdef.c"