2 Copyright (C) 2009 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "cairo_widget.h"
21 #include "gui_thread.h"
23 CairoWidget::CairoWidget ()
26 , _active_state (CairoWidget::ActiveState (0))
27 , _visual_state (CairoWidget::VisualState (0))
35 CairoWidget::~CairoWidget ()
38 g_object_unref (_pixmap);
43 CairoWidget::on_expose_event (GdkEventExpose *event)
45 Gdk::Rectangle const exposure (
46 event->area.x, event->area.y, event->area.width, event->area.height
49 Gdk::Rectangle r = exposure;
50 Gdk::Rectangle content (0, 0, _width, _height);
52 r.intersect (content, intersects);
56 GdkDrawable* drawable = get_window()->gobj ();
61 g_object_unref (_pixmap);
64 _pixmap = gdk_pixmap_new (drawable, _width, _height, -1);
66 cairo_t* cr = gdk_cairo_create (_pixmap);
75 get_style()->get_fg_gc (Gtk::STATE_NORMAL)->gobj(),
89 /** Marks the widget as dirty, so that render () will be called on
90 * the next GTK expose event.
94 CairoWidget::set_dirty ()
96 ENSURE_GUI_THREAD (*this, &CairoWidget::set_dirty)
102 /** Handle a size allocation.
103 * @param alloc GTK allocation.
106 CairoWidget::on_size_allocate (Gtk::Allocation& alloc)
108 Gtk::EventBox::on_size_allocate (alloc);
110 _width = alloc.get_width ();
111 _height = alloc.get_height ();
117 CairoWidget::get_parent_bg ()
121 parent = get_parent ();
123 while (parent && !parent->get_has_window()) {
124 parent = parent->get_parent();
127 if (parent && parent->get_has_window()) {
128 return parent->get_style ()->get_bg (parent->get_state());
131 return get_style ()->get_bg (get_state());
135 CairoWidget::set_active_state (CairoWidget::ActiveState s)
137 if (_active_state != s) {
144 CairoWidget::set_visual_state (CairoWidget::VisualState s)
146 if (_visual_state != s) {