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
  31
  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 G_DEFINE_TYPE (GtkDrawingArea, gtk_drawing_area, GTK_TYPE_WIDGET)
  38
  39 static void
  40 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  41 {
  42   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  43
  44   widget_class->realize = gtk_drawing_area_realize;
  45   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  46 }
  47
  48 static void
  49 gtk_drawing_area_init (GtkDrawingArea *darea)
  50 {
  51   darea->draw_data = NULL;
  52 }
  53
  54
  55 GtkWidget*
  56 gtk_drawing_area_new (void)
  57 {
  58   return g_object_new (GTK_TYPE_DRAWING_AREA, NULL);
  59 }
  60
  61 static void
  62 gtk_drawing_area_realize (GtkWidget *widget)
  63 {
  64   GtkDrawingArea *darea = GTK_DRAWING_AREA (widget);
  65   GdkWindowAttr attributes;
  66   gint attributes_mask;
  67
  68   if (!gtk_widget_get_has_window (widget))
  69     {
  70       GTK_WIDGET_CLASS (gtk_drawing_area_parent_class)->realize (widget);
  71     }
  72   else
  73     {
  74       gtk_widget_set_realized (widget, TRUE);
  75
  76       attributes.window_type = GDK_WINDOW_CHILD;
  77       attributes.x = widget->allocation.x;
  78       attributes.y = widget->allocation.y;
  79       attributes.width = widget->allocation.width;
  80       attributes.height = widget->allocation.height;
  81       attributes.wclass = GDK_INPUT_OUTPUT;
  82       attributes.visual = gtk_widget_get_visual (widget);
  83       attributes.colormap = gtk_widget_get_colormap (widget);
  84       attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
  85
  86       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
  87
  88       widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
  89                                        &attributes, attributes_mask);
  90       gdk_window_set_user_data (widget->window, darea);
  91
  92       widget->style = gtk_style_attach (widget->style, widget->window);
  93       gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
  94     }
  95
  96   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
  97 }
  98
  99 static void
 100 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 101                                 GtkAllocation *allocation)
 102 {
 103   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 104   g_return_if_fail (allocation != NULL);
 105
 106   widget->allocation = *allocation;
 107
 108   if (gtk_widget_get_realized (widget))
 109     {
 110       if (gtk_widget_get_has_window (widget))
 111         gdk_window_move_resize (widget->window,
 112                                 allocation->x, allocation->y,
 113                                 allocation->width, allocation->height);
 114
 115       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 116     }
 117 }
 118
 119 static void
 120 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 121 {
 122   GtkWidget *widget;
 123   GdkEvent *event = gdk_event_new (GDK_CONFIGURE);
 124
 125   widget = GTK_WIDGET (darea);
 126
 127   event->configure.window = g_object_ref (widget->window);
 128   event->configure.send_event = TRUE;
 129   event->configure.x = widget->allocation.x;
 130   event->configure.y = widget->allocation.y;
 131   event->configure.width = widget->allocation.width;
 132   event->configure.height = widget->allocation.height;
 133
 134   gtk_widget_event (widget, event);
 135   gdk_event_free (event);
 136 }