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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include <config.h>
  28 #include "gtkdrawingarea.h"
  29 #include "gtkintl.h"
  30 #include "gtkalias.h"
  31
  32
  33 static void gtk_drawing_area_class_init    (GtkDrawingAreaClass *klass);
  34 static void gtk_drawing_area_init          (GtkDrawingArea      *darea);
  35 static void gtk_drawing_area_realize       (GtkWidget           *widget);
  36 static void gtk_drawing_area_size_allocate (GtkWidget           *widget,
  37                                             GtkAllocation       *allocation);
  38 static void gtk_drawing_area_send_configure (GtkDrawingArea     *darea);
  39
  40
  41 GType
  42 gtk_drawing_area_get_type (void)
  43 {
  44   static GType drawing_area_type = 0;
  45
  46   if (!drawing_area_type)
  47     {
  48       static const GTypeInfo drawing_area_info =
  49       {
  50         sizeof (GtkDrawingAreaClass),
  51         NULL,           /* base_init */
  52         NULL,           /* base_finalize */
  53         (GClassInitFunc) gtk_drawing_area_class_init,
  54         NULL,           /* class_finalize */
  55         NULL,           /* class_data */
  56         sizeof (GtkDrawingArea),
  57         0,              /* n_preallocs */
  58         (GInstanceInitFunc) gtk_drawing_area_init,
  59       };
  60
  61       drawing_area_type =
  62         g_type_register_static (GTK_TYPE_WIDGET, I_("GtkDrawingArea"),
  63                                 &drawing_area_info, 0);
  64     }
  65
  66   return drawing_area_type;
  67 }
  68
  69 static void
  70 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  71 {
  72   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  73
  74   widget_class->realize = gtk_drawing_area_realize;
  75   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  76 }
  77
  78 static void
  79 gtk_drawing_area_init (GtkDrawingArea *darea)
  80 {
  81   darea->draw_data = NULL;
  82 }
  83
  84
  85 GtkWidget*
  86 gtk_drawing_area_new (void)
  87 {
  88   return g_object_new (GTK_TYPE_DRAWING_AREA, NULL);
  89 }
  90
  91 void
  92 gtk_drawing_area_size (GtkDrawingArea *darea,
  93                        gint            width,
  94                        gint            height)
  95 {
  96   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  97
  98   GTK_WIDGET (darea)->requisition.width = width;
  99   GTK_WIDGET (darea)->requisition.height = height;
 100
 101   gtk_widget_queue_resize (GTK_WIDGET (darea));
 102 }
 103
 104 static void
 105 gtk_drawing_area_realize (GtkWidget *widget)
 106 {
 107   GtkDrawingArea *darea;
 108   GdkWindowAttr attributes;
 109   gint attributes_mask;
 110
 111   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 112
 113   darea = GTK_DRAWING_AREA (widget);
 114   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 115
 116   attributes.window_type = GDK_WINDOW_CHILD;
 117   attributes.x = widget->allocation.x;
 118   attributes.y = widget->allocation.y;
 119   attributes.width = widget->allocation.width;
 120   attributes.height = widget->allocation.height;
 121   attributes.wclass = GDK_INPUT_OUTPUT;
 122   attributes.visual = gtk_widget_get_visual (widget);
 123   attributes.colormap = gtk_widget_get_colormap (widget);
 124   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 125
 126   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 127
 128   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 129   gdk_window_set_user_data (widget->window, darea);
 130
 131   widget->style = gtk_style_attach (widget->style, widget->window);
 132   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 133
 134   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 135 }
 136
 137 static void
 138 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 139                                 GtkAllocation *allocation)
 140 {
 141   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 142   g_return_if_fail (allocation != NULL);
 143
 144   widget->allocation = *allocation;
 145
 146   if (GTK_WIDGET_REALIZED (widget))
 147     {
 148       gdk_window_move_resize (widget->window,
 149                               allocation->x, allocation->y,
 150                               allocation->width, allocation->height);
 151
 152       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 153     }
 154 }
 155
 156 static void
 157 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 158 {
 159   GtkWidget *widget;
 160   GdkEvent *event = gdk_event_new (GDK_CONFIGURE);
 161
 162   widget = GTK_WIDGET (darea);
 163
 164   event->configure.window = g_object_ref (widget->window);
 165   event->configure.send_event = TRUE;
 166   event->configure.x = widget->allocation.x;
 167   event->configure.y = widget->allocation.y;
 168   event->configure.width = widget->allocation.width;
 169   event->configure.height = widget->allocation.height;
 170
 171   gtk_widget_event (widget, event);
 172   gdk_event_free (event);
 173 }
 174
 175 #define __GTK_DRAWING_AREA_C__
 176 #include "gtkaliasdef.c"