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 #ifndef __gtk2_ardour_cairo_widget_h__
21 #define __gtk2_ardour_cairo_widget_h__
23 #include <gtkmm/eventbox.h>
24 #include "gtkmm2ext/widget_state.h"
26 /** A parent class for widgets that are rendered using Cairo.
29 class CairoWidget : public Gtk::EventBox
33 virtual ~CairoWidget ();
37 Gtkmm2ext::ActiveState active_state() const { return _active_state; }
38 Gtkmm2ext::VisualState visual_state() const { return _visual_state; }
39 virtual void set_active_state (Gtkmm2ext::ActiveState);
40 virtual void set_visual_state (Gtkmm2ext::VisualState);
41 virtual void unset_active_state () { set_active_state (Gtkmm2ext::ActiveState (0)); }
42 virtual void unset_visual_state () { set_visual_state (Gtkmm2ext::VisualState (0)); }
44 sigc::signal<void> StateChanged;
47 /** Render the widget to the given Cairo context */
48 virtual void render (cairo_t *) = 0;
49 virtual bool on_expose_event (GdkEventExpose *);
50 void on_size_allocate (Gtk::Allocation &);
51 void on_state_changed (Gtk::StateType);
52 Gdk::Color get_parent_bg ();
54 int _width; ///< pixmap width
55 int _height; ///< pixmap height
56 Gtkmm2ext::ActiveState _active_state;
57 Gtkmm2ext::VisualState _visual_state;
60 GdkPixmap* _pixmap; ///< our pixmap