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 "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_TYPE_WIDGET, &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 = GTK_WIDGET_CLASS (class);
  67
  68   widget_class->realize = gtk_drawing_area_realize;
  69   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  70 }
  71
  72 static void
  73 gtk_drawing_area_init (GtkDrawingArea *darea)
  74 {
  75   darea->draw_data = NULL;
  76 }
  77
  78
  79 GtkWidget*
  80 gtk_drawing_area_new (void)
  81 {
  82   return GTK_WIDGET (gtk_type_new (GTK_TYPE_DRAWING_AREA));
  83 }
  84
  85 void
  86 gtk_drawing_area_size (GtkDrawingArea *darea,
  87                        gint            width,
  88                        gint            height)
  89 {
  90   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  91
  92   GTK_WIDGET (darea)->requisition.width = width;
  93   GTK_WIDGET (darea)->requisition.height = height;
  94
  95   gtk_widget_queue_resize (GTK_WIDGET (darea));
  96 }
  97
  98 static void
  99 gtk_drawing_area_realize (GtkWidget *widget)
 100 {
 101   GtkDrawingArea *darea;
 102   GdkWindowAttr attributes;
 103   gint attributes_mask;
 104
 105   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 106
 107   darea = GTK_DRAWING_AREA (widget);
 108   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 109
 110   attributes.window_type = GDK_WINDOW_CHILD;
 111   attributes.x = widget->allocation.x;
 112   attributes.y = widget->allocation.y;
 113   attributes.width = widget->allocation.width;
 114   attributes.height = widget->allocation.height;
 115   attributes.wclass = GDK_INPUT_OUTPUT;
 116   attributes.visual = gtk_widget_get_visual (widget);
 117   attributes.colormap = gtk_widget_get_colormap (widget);
 118   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 119
 120   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 121
 122   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 123   gdk_window_set_user_data (widget->window, darea);
 124
 125   widget->style = gtk_style_attach (widget->style, widget->window);
 126   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 127
 128   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 129 }
 130
 131 static void
 132 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 133                                 GtkAllocation *allocation)
 134 {
 135   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 136   g_return_if_fail (allocation != NULL);
 137
 138   widget->allocation = *allocation;
 139
 140   if (GTK_WIDGET_REALIZED (widget))
 141     {
 142       gdk_window_move_resize (widget->window,
 143                               allocation->x, allocation->y,
 144                               allocation->width, allocation->height);
 145
 146       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 147     }
 148 }
 149
 150 static void
 151 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 152 {
 153   GtkWidget *widget;
 154   GdkEventConfigure event;
 155
 156   widget = GTK_WIDGET (darea);
 157
 158   event.type = GDK_CONFIGURE;
 159   event.window = widget->window;
 160   event.send_event = TRUE;
 161   event.x = widget->allocation.x;
 162   event.y = widget->allocation.y;
 163   event.width = widget->allocation.width;
 164   event.height = widget->allocation.height;
 165
 166   gtk_widget_event (widget, (GdkEvent*) &event);
 167 }