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 #include "gtkdrawingarea.h"
  20
  21
  22 static void gtk_drawing_area_class_init    (GtkDrawingAreaClass *klass);
  23 static void gtk_drawing_area_init          (GtkDrawingArea      *darea);
  24 static void gtk_drawing_area_realize       (GtkWidget           *widget);
  25 static void gtk_drawing_area_size_allocate (GtkWidget           *widget,
  26                                             GtkAllocation       *allocation);
  27 static void gtk_drawing_area_send_configure (GtkDrawingArea     *darea);
  28
  29
  30 guint
  31 gtk_drawing_area_get_type (void)
  32 {
  33   static guint drawing_area_type = 0;
  34
  35   if (!drawing_area_type)
  36     {
  37       GtkTypeInfo drawing_area_info =
  38       {
  39         "GtkDrawingArea",
  40         sizeof (GtkDrawingArea),
  41         sizeof (GtkDrawingAreaClass),
  42         (GtkClassInitFunc) gtk_drawing_area_class_init,
  43         (GtkObjectInitFunc) gtk_drawing_area_init,
  44         (GtkArgSetFunc) NULL,
  45         (GtkArgGetFunc) NULL,
  46       };
  47
  48       drawing_area_type = gtk_type_unique (gtk_widget_get_type (), &drawing_area_info);
  49     }
  50
  51   return drawing_area_type;
  52 }
  53
  54 static void
  55 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  56 {
  57   GtkWidgetClass *widget_class;
  58
  59   widget_class = (GtkWidgetClass*) class;
  60
  61   widget_class->realize = gtk_drawing_area_realize;
  62   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  63 }
  64
  65 static void
  66 gtk_drawing_area_init (GtkDrawingArea *darea)
  67 {
  68   GTK_WIDGET_SET_FLAGS (darea, GTK_BASIC);
  69
  70   darea->draw_data = NULL;
  71 }
  72
  73
  74 GtkWidget*
  75 gtk_drawing_area_new (void)
  76 {
  77   return GTK_WIDGET (gtk_type_new (gtk_drawing_area_get_type ()));
  78 }
  79
  80 void
  81 gtk_drawing_area_size (GtkDrawingArea *darea,
  82                        gint            width,
  83                        gint            height)
  84 {
  85   g_return_if_fail (darea != NULL);
  86   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  87
  88   GTK_WIDGET (darea)->requisition.width = width;
  89   GTK_WIDGET (darea)->requisition.height = height;
  90 }
  91
  92 static void
  93 gtk_drawing_area_realize (GtkWidget *widget)
  94 {
  95   GtkDrawingArea *darea;
  96   GdkWindowAttr attributes;
  97   gint attributes_mask;
  98
  99   g_return_if_fail (widget != NULL);
 100   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 101
 102   darea = GTK_DRAWING_AREA (widget);
 103   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 104
 105   attributes.window_type = GDK_WINDOW_CHILD;
 106   attributes.x = widget->allocation.x;
 107   attributes.y = widget->allocation.y;
 108   attributes.width = widget->allocation.width;
 109   attributes.height = widget->allocation.height;
 110   attributes.wclass = GDK_INPUT_OUTPUT;
 111   attributes.visual = gtk_widget_get_visual (widget);
 112   attributes.colormap = gtk_widget_get_colormap (widget);
 113   attributes.event_mask = gtk_widget_get_events (widget);
 114
 115   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 116
 117   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 118   gdk_window_set_user_data (widget->window, darea);
 119
 120   widget->style = gtk_style_attach (widget->style, widget->window);
 121   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 122
 123   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 124 }
 125
 126 static void
 127 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 128                                 GtkAllocation *allocation)
 129 {
 130   g_return_if_fail (widget != NULL);
 131   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 132   g_return_if_fail (allocation != NULL);
 133
 134   widget->allocation = *allocation;
 135
 136   if (GTK_WIDGET_REALIZED (widget))
 137     {
 138       gdk_window_move_resize (widget->window,
 139                               allocation->x, allocation->y,
 140                               allocation->width, allocation->height);
 141
 142       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 143     }
 144 }
 145
 146 static void
 147 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 148 {
 149   GtkWidget *widget;
 150   GdkEventConfigure event;
 151
 152   widget = GTK_WIDGET (darea);
 153
 154   event.type = GDK_CONFIGURE;
 155   event.window = widget->window;
 156   event.x = widget->allocation.x;
 157   event.y = widget->allocation.y;
 158   event.width = widget->allocation.width;
 159   event.height = widget->allocation.height;
 160
 161   gtk_widget_event (widget, (GdkEvent*) &event);
 162 }