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

   1 /*
   2  * This library is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU Lesser General Public
   4  * License as published by the Free Software Foundation; either
   5  * version 2 of the License, or (at your option) any later version.
   6  *
   7  * This library is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  10  * Lesser General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU Lesser General Public
  13  * License along with this library; if not, write to the
  14  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15  * Boston, MA 02111-1307, USA.
  16  *
  17  * Authors: Cody Russell <crussell@canonical.com>
  18  *          Alexander Larsson <alexl@redhat.com>
  19  */
  20
  21 #include "gtkoffscreenwindow.h"
  22 #include "gtkalias.h"
  23
  24 G_DEFINE_TYPE (GtkOffscreenWindow, gtk_offscreen_window, GTK_TYPE_WINDOW);
  25
  26 static void
  27 gtk_offscreen_window_size_request (GtkWidget *widget,
  28                                    GtkRequisition *requisition)
  29 {
  30   GtkBin *bin = GTK_BIN (widget);
  31   gint border_width;
  32   gint default_width, default_height;
  33
  34   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
  35
  36   requisition->width = border_width * 2;
  37   requisition->height = border_width * 2;
  38
  39   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
  40     {
  41       GtkRequisition child_req;
  42
  43       gtk_widget_size_request (bin->child, &child_req);
  44
  45       requisition->width += child_req.width;
  46       requisition->height += child_req.height;
  47     }
  48
  49   gtk_window_get_default_size (GTK_WINDOW (widget),
  50                                &default_width, &default_height);
  51   if (default_width > 0)
  52     requisition->width = default_width;
  53
  54   if (default_height > 0)
  55     requisition->height = default_height;
  56 }
  57
  58 static void
  59 gtk_offscreen_window_size_allocate (GtkWidget *widget,
  60                                     GtkAllocation *allocation)
  61 {
  62   GtkBin *bin = GTK_BIN (widget);
  63   gint border_width;
  64
  65   widget->allocation = *allocation;
  66
  67   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
  68
  69   if (GTK_WIDGET_REALIZED (widget))
  70     gdk_window_move_resize (widget->window,
  71                             allocation->x,
  72                             allocation->y,
  73                             allocation->width,
  74                             allocation->height);
  75
  76   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
  77     {
  78       GtkAllocation  child_alloc;
  79
  80       child_alloc.x = border_width;
  81       child_alloc.y = border_width;
  82       child_alloc.width = allocation->width - 2 * border_width;
  83       child_alloc.height = allocation->height - 2 * border_width;
  84
  85       gtk_widget_size_allocate (bin->child, &child_alloc);
  86     }
  87
  88   gtk_widget_queue_draw (widget);
  89 }
  90
  91 static void
  92 gtk_offscreen_window_realize (GtkWidget *widget)
  93 {
  94   GtkBin *bin;
  95   GdkWindowAttr attributes;
  96   gint attributes_mask;
  97   gint border_width;
  98
  99   bin = GTK_BIN (widget);
 100
 101   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 102
 103   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 104
 105   attributes.x = widget->allocation.x;
 106   attributes.y = widget->allocation.y;
 107   attributes.width = widget->allocation.width;
 108   attributes.height = widget->allocation.height;
 109   attributes.window_type = GDK_WINDOW_OFFSCREEN;
 110   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 111   attributes.visual = gtk_widget_get_visual (widget);
 112   attributes.colormap = gtk_widget_get_colormap (widget);
 113   attributes.wclass = GDK_INPUT_OUTPUT;
 114
 115   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 116
 117   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 118                                    &attributes, attributes_mask);
 119   gdk_window_set_user_data (widget->window, widget);
 120
 121   if (bin->child)
 122     gtk_widget_set_parent_window (bin->child, widget->window);
 123
 124   widget->style = gtk_style_attach (widget->style, widget->window);
 125
 126   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 127 }
 128
 129 static void
 130 gtk_offscreen_window_resize (GtkWidget *widget)
 131 {
 132   GtkAllocation allocation = { 0, 0 };
 133   GtkRequisition requisition;
 134
 135   gtk_widget_size_request (widget, &requisition);
 136
 137   allocation.width  = requisition.width;
 138   allocation.height = requisition.height;
 139   gtk_widget_size_allocate (widget, &allocation);
 140 }
 141
 142 static void
 143 move_focus (GtkWidget       *widget,
 144             GtkDirectionType dir)
 145 {
 146   gtk_widget_child_focus (widget, dir);
 147
 148   if (!GTK_CONTAINER (widget)->focus_child)
 149     gtk_window_set_focus (GTK_WINDOW (widget), NULL);
 150 }
 151
 152 static void
 153 gtk_offscreen_window_show (GtkWidget *widget)
 154 {
 155   gboolean need_resize;
 156   GtkContainer *container;
 157
 158   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 159
 160   container = GTK_CONTAINER (widget);
 161   need_resize = container->need_resize || !GTK_WIDGET_REALIZED (widget);
 162   container->need_resize = FALSE;
 163
 164   if (need_resize)
 165     gtk_offscreen_window_resize (widget);
 166
 167   gtk_widget_map (widget);
 168
 169   /* Try to make sure that we have some focused widget */
 170   if (!gtk_window_get_focus (GTK_WINDOW (widget)))
 171     move_focus (widget, GTK_DIR_TAB_FORWARD);
 172 }
 173
 174 static void
 175 gtk_offscreen_window_hide (GtkWidget *widget)
 176 {
 177   GTK_WIDGET_UNSET_FLAGS (widget, GTK_VISIBLE);
 178   gtk_widget_unmap (widget);
 179 }
 180
 181 static void
 182 gtk_offscreen_window_check_resize (GtkContainer *container)
 183 {
 184   GtkWidget *widget = GTK_WIDGET (container);
 185
 186   if (GTK_WIDGET_VISIBLE (widget))
 187     gtk_offscreen_window_resize (widget);
 188 }
 189
 190 static void
 191 gtk_offscreen_window_class_init (GtkOffscreenWindowClass *class)
 192 {
 193   GtkWidgetClass *widget_class;
 194   GtkContainerClass *container_class;
 195
 196   widget_class = GTK_WIDGET_CLASS (class);
 197   container_class = GTK_CONTAINER_CLASS (class);
 198
 199   widget_class->realize = gtk_offscreen_window_realize;
 200   widget_class->show = gtk_offscreen_window_show;
 201   widget_class->hide = gtk_offscreen_window_hide;
 202   widget_class->size_request = gtk_offscreen_window_size_request;
 203   widget_class->size_allocate = gtk_offscreen_window_size_allocate;
 204
 205   container_class->check_resize = gtk_offscreen_window_check_resize;
 206 }
 207
 208 static void
 209 gtk_offscreen_window_init (GtkOffscreenWindow *window)
 210 {
 211 }
 212
 213 GtkWidget *
 214 gtk_offscreen_window_new (void)
 215 {
 216   return g_object_new (gtk_offscreen_window_get_type (), NULL);
 217 }
 218
 219
 220 #define __GTK_OFFSCREEN_WINDOW_C__
 221 #include "gtkaliasdef.c"