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