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 Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18 #include "gtkdrawingarea.h"
  19
  20
  21 static void gtk_drawing_area_class_init    (GtkDrawingAreaClass *klass);
  22 static void gtk_drawing_area_init          (GtkDrawingArea      *darea);
  23 static void gtk_drawing_area_realize       (GtkWidget           *widget);
  24 static void gtk_drawing_area_size_allocate (GtkWidget           *widget,
  25                                             GtkAllocation       *allocation);
  26
  27
  28 guint
  29 gtk_drawing_area_get_type ()
  30 {
  31   static guint drawing_area_type = 0;
  32
  33   if (!drawing_area_type)
  34     {
  35       GtkTypeInfo drawing_area_info =
  36       {
  37         "GtkDrawingArea",
  38         sizeof (GtkDrawingArea),
  39         sizeof (GtkDrawingAreaClass),
  40         (GtkClassInitFunc) gtk_drawing_area_class_init,
  41         (GtkObjectInitFunc) gtk_drawing_area_init,
  42         (GtkArgSetFunc) NULL,
  43         (GtkArgGetFunc) NULL,
  44       };
  45
  46       drawing_area_type = gtk_type_unique (gtk_widget_get_type (), &drawing_area_info);
  47     }
  48
  49   return drawing_area_type;
  50 }
  51
  52 static void
  53 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  54 {
  55   GtkWidgetClass *widget_class;
  56
  57   widget_class = (GtkWidgetClass*) class;
  58
  59   widget_class->realize = gtk_drawing_area_realize;
  60   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  61 }
  62
  63 static void
  64 gtk_drawing_area_init (GtkDrawingArea *darea)
  65 {
  66   GTK_WIDGET_SET_FLAGS (darea, GTK_BASIC);
  67 }
  68
  69
  70 GtkWidget*
  71 gtk_drawing_area_new ()
  72 {
  73   return GTK_WIDGET (gtk_type_new (gtk_drawing_area_get_type ()));
  74 }
  75
  76 void
  77 gtk_drawing_area_size (GtkDrawingArea *darea,
  78                        gint            width,
  79                        gint            height)
  80 {
  81   g_return_if_fail (darea != NULL);
  82   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  83
  84   GTK_WIDGET (darea)->requisition.width = width;
  85   GTK_WIDGET (darea)->requisition.height = height;
  86 }
  87
  88 static void
  89 gtk_drawing_area_realize (GtkWidget *widget)
  90 {
  91   GtkDrawingArea *darea;
  92   GdkWindowAttr attributes;
  93   gint attributes_mask;
  94
  95   g_return_if_fail (widget != NULL);
  96   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
  97
  98   darea = GTK_DRAWING_AREA (widget);
  99   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 100
 101   attributes.window_type = GDK_WINDOW_CHILD;
 102   attributes.x = widget->allocation.x;
 103   attributes.y = widget->allocation.y;
 104   attributes.width = widget->allocation.width;
 105   attributes.height = widget->allocation.height;
 106   attributes.wclass = GDK_INPUT_OUTPUT;
 107   attributes.visual = gtk_widget_get_visual (widget);
 108   attributes.colormap = gtk_widget_get_colormap (widget);
 109   attributes.event_mask = gtk_widget_get_events (widget);
 110
 111   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 112
 113   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 114   gdk_window_set_user_data (widget->window, darea);
 115
 116   widget->style = gtk_style_attach (widget->style, widget->window);
 117   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 118 }
 119
 120 static void
 121 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 122                                 GtkAllocation *allocation)
 123 {
 124   GdkEventConfigure event;
 125
 126   g_return_if_fail (widget != NULL);
 127   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 128   g_return_if_fail (allocation != NULL);
 129
 130   widget->allocation = *allocation;
 131
 132   if (GTK_WIDGET_REALIZED (widget))
 133     {
 134       gdk_window_move_resize (widget->window,
 135                               allocation->x, allocation->y,
 136                               allocation->width, allocation->height);
 137
 138       event.type = GDK_CONFIGURE;
 139       event.window = widget->window;
 140       event.x = allocation->x;
 141       event.y = allocation->y;
 142       event.width = allocation->width;
 143       event.height = allocation->height;
 144
 145       gtk_widget_event (widget, (GdkEvent*) &event);
 146     }
 147 }