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         /* reserved_1 */ NULL,
  45         /* reserved_2 */ NULL,
  46         (GtkClassInitFunc) NULL,
  47       };
  48
  49       drawing_area_type = gtk_type_unique (gtk_widget_get_type (), &drawing_area_info);
  50     }
  51
  52   return drawing_area_type;
  53 }
  54
  55 static void
  56 gtk_drawing_area_class_init (GtkDrawingAreaClass *class)
  57 {
  58   GtkWidgetClass *widget_class;
  59
  60   widget_class = (GtkWidgetClass*) class;
  61
  62   widget_class->realize = gtk_drawing_area_realize;
  63   widget_class->size_allocate = gtk_drawing_area_size_allocate;
  64 }
  65
  66 static void
  67 gtk_drawing_area_init (GtkDrawingArea *darea)
  68 {
  69   GTK_WIDGET_SET_FLAGS (darea, GTK_BASIC);
  70
  71   darea->draw_data = NULL;
  72 }
  73
  74
  75 GtkWidget*
  76 gtk_drawing_area_new (void)
  77 {
  78   return GTK_WIDGET (gtk_type_new (gtk_drawing_area_get_type ()));
  79 }
  80
  81 void
  82 gtk_drawing_area_size (GtkDrawingArea *darea,
  83                        gint            width,
  84                        gint            height)
  85 {
  86   g_return_if_fail (darea != NULL);
  87   g_return_if_fail (GTK_IS_DRAWING_AREA (darea));
  88
  89   GTK_WIDGET (darea)->requisition.width = width;
  90   GTK_WIDGET (darea)->requisition.height = height;
  91 }
  92
  93 static void
  94 gtk_drawing_area_realize (GtkWidget *widget)
  95 {
  96   GtkDrawingArea *darea;
  97   GdkWindowAttr attributes;
  98   gint attributes_mask;
  99
 100   g_return_if_fail (widget != NULL);
 101   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 102
 103   darea = GTK_DRAWING_AREA (widget);
 104   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 105
 106   attributes.window_type = GDK_WINDOW_CHILD;
 107   attributes.x = widget->allocation.x;
 108   attributes.y = widget->allocation.y;
 109   attributes.width = widget->allocation.width;
 110   attributes.height = widget->allocation.height;
 111   attributes.wclass = GDK_INPUT_OUTPUT;
 112   attributes.visual = gtk_widget_get_visual (widget);
 113   attributes.colormap = gtk_widget_get_colormap (widget);
 114   attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
 115
 116   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 117
 118   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 119   gdk_window_set_user_data (widget->window, darea);
 120
 121   widget->style = gtk_style_attach (widget->style, widget->window);
 122   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 123
 124   gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 125 }
 126
 127 static void
 128 gtk_drawing_area_size_allocate (GtkWidget     *widget,
 129                                 GtkAllocation *allocation)
 130 {
 131   g_return_if_fail (widget != NULL);
 132   g_return_if_fail (GTK_IS_DRAWING_AREA (widget));
 133   g_return_if_fail (allocation != NULL);
 134
 135   widget->allocation = *allocation;
 136
 137   if (GTK_WIDGET_REALIZED (widget))
 138     {
 139       gdk_window_move_resize (widget->window,
 140                               allocation->x, allocation->y,
 141                               allocation->width, allocation->height);
 142
 143       gtk_drawing_area_send_configure (GTK_DRAWING_AREA (widget));
 144     }
 145 }
 146
 147 static void
 148 gtk_drawing_area_send_configure (GtkDrawingArea *darea)
 149 {
 150   GtkWidget *widget;
 151   GdkEventConfigure event;
 152
 153   widget = GTK_WIDGET (darea);
 154
 155   event.type = GDK_CONFIGURE;
 156   event.window = widget->window;
 157   event.x = widget->allocation.x;
 158   event.y = widget->allocation.y;
 159   event.width = widget->allocation.width;
 160   event.height = widget->allocation.height;
 161
 162   gtk_widget_event (widget, (GdkEvent*) &event);
 163 }