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 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 /*
  21  * Modified by the GTK+ Team and others 1997-1999.  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 "gtkdrawingarea.h"
  28
  29
  30 static void gtk_drawing_area_class_init    (GtkDrawingAreaClass *klass);
  31 static void gtk_drawing_area_init          (GtkDrawingArea      *darea);
  32 static void gtk_drawing_area_realize       (GtkWidget           *widget);
  33 static void gtk_drawing_area_size_allocate (GtkWidget           *widget,
  34                                             GtkAllocation       *allocation);
  35 static void gtk_drawing_area_send_configure (GtkDrawingArea     *darea);
  36
  37
  38 GtkType
  39 gtk_drawing_area_get_type (void)
  40 {
  41   static GtkType drawing_area_type = 0;
  42
  43   if (!drawing_area_type)
  44     {
  45       static const GtkTypeInfo drawing_area_info =
  46       {
  47         "GtkDrawingArea",
  48         sizeof (GtkDrawingArea),
  49         sizeof (GtkDrawingAreaClass),
  50         (GtkClassInitFunc) gtk_drawing_area_class_init,
  51         (GtkObjectInitFunc) gtk_drawing_area_init,
  52         /* reserved_1 */ NULL,
  53         /* reserved_2 */ NULL,
  54         (GtkClassInitFunc) NULL,
  55       };
  56
  57       drawing_area_type = gtk_type_unique (gtk_widget_get_type (), &drawing_area_info);
  58     }
  59
  60   return drawing_area_type;
  61 }
  62
  63 static void
  64 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  65 {
  66   GtkWidgetClass *widget_class;
  67
  68   widget_class = (GtkWidgetClass*) class;
  69
  70   widget_class->realize = gtk_drawing_area_realize;
  71   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  72 }
  73
  74 static void
  75 gtk_drawing_area_init (GtkDrawingArea *darea)
  76 {
  77   darea->draw_data = NULL;
  78 }
  79
  80
  81 GtkWidget*
  82 gtk_drawing_area_new (void)
  83 {
  84   return GTK_WIDGET (gtk_type_new (gtk_drawing_area_get_type ()));
  85 }
  86
  87 void
  88 gtk_drawing_area_size (GtkDrawingArea *darea,
  89                        gint            width,
  90                        gint            height)
  91 {
  92   g_return_if_fail (darea != NULL);
  93   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  94
  95   GTK_WIDGET (darea)->requisition.width = width;
  96   GTK_WIDGET (darea)->requisition.height = height;
  97 }
  98
  99 static void
 100 gtk_drawing_area_realize (GtkWidget *widget)
 101 {
 102   GtkDrawingArea *darea;
 103   GdkWindowAttr attributes;
 104   gint attributes_mask;
 105
 106   g_return_if_fail (widget != NULL);
 107   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 108
 109   darea = GTK_DRAWING_AREA (widget);
 110   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 111
 112   attributes.window_type = GDK_WINDOW_CHILD;
 113   attributes.x = widget->allocation.x;
 114   attributes.y = widget->allocation.y;
 115   attributes.width = widget->allocation.width;
 116   attributes.height = widget->allocation.height;
 117   attributes.wclass = GDK_INPUT_OUTPUT;
 118   attributes.visual = gtk_widget_get_visual (widget);
 119   attributes.colormap = gtk_widget_get_colormap (widget);
 120   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 121
 122   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 123
 124   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 125   gdk_window_set_user_data (widget->window, darea);
 126
 127   widget->style = gtk_style_attach (widget->style, widget->window);
 128   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 129
 130   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 131 }
 132
 133 static void
 134 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 135                                 GtkAllocation *allocation)
 136 {
 137   g_return_if_fail (widget != NULL);
 138   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 139   g_return_if_fail (allocation != NULL);
 140
 141   widget->allocation = *allocation;
 142
 143   if (GTK_WIDGET_REALIZED (widget))
 144     {
 145       gdk_window_move_resize (widget->window,
 146                               allocation->x, allocation->y,
 147                               allocation->width, allocation->height);
 148
 149       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 150     }
 151 }
 152
 153 static void
 154 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 155 {
 156   GtkWidget *widget;
 157   GdkEventConfigure event;
 158
 159   widget = GTK_WIDGET (darea);
 160
 161   event.type = GDK_CONFIGURE;
 162   event.window = widget->window;
 163   event.x = widget->allocation.x;
 164   event.y = widget->allocation.y;
 165   event.width = widget->allocation.width;
 166   event.height = widget->allocation.height;
 167
 168   gtk_widget_event (widget, (GdkEvent*) &event);
 169 }