Paul Davis
8ad4133d26
git-svn-id: svn://localhost/ardour2/branches/3.0@10673 d708f5d6-7413-0410-9779-e7cbd77b26cf
85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
/*
|
|
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); }
|
|
|
|
/* widgets can be told to only draw their "foreground, and thus leave
|
|
in place whatever background is drawn by their parent. the default
|
|
is that the widget will fill its event window with the background
|
|
color of the parent container.
|
|
*/
|
|
|
|
void set_draw_background (bool yn);
|
|
|
|
sigc::signal<void> StateChanged;
|
|
|
|
static void provide_background_for_cairo_widget (Gtk::Widget& w, const Gdk::Color& bg);
|
|
|
|
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 ();
|
|
|
|
Gtkmm2ext::ActiveState _active_state;
|
|
Gtkmm2ext::VisualState _visual_state;
|
|
bool _need_bg;
|
|
|
|
private:
|
|
GdkPixmap* _pixmap; ///< our pixmap
|
|
};
|
|
|
|
#endif
|