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/*
Copyright (C) 2009 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __gtk2_ardour_cairo_widget_h__
#define __gtk2_ardour_cairo_widget_h__
#include <gtkmm/eventbox.h>
#include "gtkmm2ext/widget_state.h"
/** A parent class for widgets that are rendered using Cairo.
*/
class CairoWidget : public Gtk::EventBox
{
public:
CairoWidget ();
virtual ~CairoWidget ();
void set_dirty ();
Gtkmm2ext::ActiveState active_state() const { return _active_state; }
Gtkmm2ext::VisualState visual_state() const { return _visual_state; }
/* derived widgets can override these two to catch
changes in active & visual state
*/
virtual void set_active_state (Gtkmm2ext::ActiveState);
virtual void set_visual_state (Gtkmm2ext::VisualState);
void unset_active_state () { set_active_state (Gtkmm2ext::ActiveState (0)); }
void unset_visual_state () { set_visual_state (Gtkmm2ext::VisualState (0)); }
/* this is an API simplification for widgets
that only use the Active and Normal active states.
*/
void set_active (bool);
bool get_active () { return active_state() != Gtkmm2ext::ActiveState (0); }
sigc::signal<void> StateChanged;
protected:
/** Render the widget to the given Cairo context */
virtual void render (cairo_t *) = 0;
virtual bool on_expose_event (GdkEventExpose *);
void on_size_allocate (Gtk::Allocation &);
void on_state_changed (Gtk::StateType);
Gdk::Color get_parent_bg ();
int _width; ///< pixmap width
int _height; ///< pixmap height
Gtkmm2ext::ActiveState _active_state;
Gtkmm2ext::VisualState _visual_state;
private:
GdkPixmap* _pixmap; ///< our pixmap
};
#endif
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