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_realize       (GtkWidget           *widget);
  34 static void gtk_drawing_area_size_allocate (GtkWidget           *widget,
  35                                             GtkAllocation       *allocation);
  36 static void gtk_drawing_area_send_configure (GtkDrawingArea     *darea);
  37
  38 G_DEFINE_TYPE (GtkDrawingArea, gtk_drawing_area, GTK_TYPE_WIDGET)
  39
  40 static void
  41 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  42 {
  43   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  44
  45   widget_class->realize = gtk_drawing_area_realize;
  46   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  47 }
  48
  49 static void
  50 gtk_drawing_area_init (GtkDrawingArea *darea)
  51 {
  52   darea->draw_data = NULL;
  53 }
  54
  55
  56 GtkWidget*
  57 gtk_drawing_area_new (void)
  58 {
  59   return g_object_new (GTK_TYPE_DRAWING_AREA, NULL);
  60 }
  61
  62 void
  63 gtk_drawing_area_size (GtkDrawingArea *darea,
  64                        gint            width,
  65                        gint            height)
  66 {
  67   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  68
  69   GTK_WIDGET (darea)->requisition.width = width;
  70   GTK_WIDGET (darea)->requisition.height = height;
  71
  72   gtk_widget_queue_resize (GTK_WIDGET (darea));
  73 }
  74
  75 static void
  76 gtk_drawing_area_realize (GtkWidget *widget)
  77 {
  78   GtkDrawingArea *darea = GTK_DRAWING_AREA (widget);
  79   GdkWindowAttr attributes;
  80   gint attributes_mask;
  81
  82   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  83
  84   attributes.window_type = GDK_WINDOW_CHILD;
  85   attributes.x = widget->allocation.x;
  86   attributes.y = widget->allocation.y;
  87   attributes.width = widget->allocation.width;
  88   attributes.height = widget->allocation.height;
  89   attributes.wclass = GDK_INPUT_OUTPUT;
  90   attributes.visual = gtk_widget_get_visual (widget);
  91   attributes.colormap = gtk_widget_get_colormap (widget);
  92   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
  93
  94   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
  95
  96   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
  97   gdk_window_set_user_data (widget->window, darea);
  98
  99   widget->style = gtk_style_attach (widget->style, widget->window);
 100   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 101
 102   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 103 }
 104
 105 static void
 106 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 107                                 GtkAllocation *allocation)
 108 {
 109   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 110   g_return_if_fail (allocation != NULL);
 111
 112   widget->allocation = *allocation;
 113
 114   if (GTK_WIDGET_REALIZED (widget))
 115     {
 116       gdk_window_move_resize (widget->window,
 117                               allocation->x, allocation->y,
 118                               allocation->width, allocation->height);
 119
 120       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 121     }
 122 }
 123
 124 static void
 125 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 126 {
 127   GtkWidget *widget;
 128   GdkEvent *event = gdk_event_new (GDK_CONFIGURE);
 129
 130   widget = GTK_WIDGET (darea);
 131
 132   event->configure.window = g_object_ref (widget->window);
 133   event->configure.send_event = TRUE;
 134   event->configure.x = widget->allocation.x;
 135   event->configure.y = widget->allocation.y;
 136   event->configure.width = widget->allocation.width;
 137   event->configure.height = widget->allocation.height;
 138
 139   gtk_widget_event (widget, event);
 140   gdk_event_free (event);
 141 }
 142
 143 #define __GTK_DRAWING_AREA_C__
 144 #include "gtkaliasdef.c"