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#ifndef tdegtk_widgetlookup_h
#define tdegtk_widgetlookup_h
/*
* this file was largely taken from the oxygen gtk engine
* Copyright (c) 2010 Hugo Pereira Da Costa <[email protected]>
* Copyright (c) 2010 Ruslan Kabatsayev <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or( at your option ) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "tdegtk-hooks.h"
#include "tdegtk-signals.h"
#include <cairo/cairo.h>
#include <gtk/gtk.h>
#include <list>
#include <map>
//! uses the widget's "draw" signal to bind GtkWidget and cairo context
/*! this allows us to retrieve painted widgets from ThemingEngine rendering primitives */
class WidgetLookup
{
public:
//! constructor
explicit WidgetLookup( void );
//! destructor
virtual ~WidgetLookup( void );
//! initialize hooks
void initializeHooks( void );
//! find widget matching given context and type
GtkWidget* find( cairo_t*, const GtkWidgetPath* ) const;
//! find widget matching given context and type
GtkWidget* find( cairo_t*, GType ) const;
protected:
//! bind widget to context
void bind( GtkWidget*, cairo_t* );
//! unregister widget
void unregisterWidget( GtkWidget* );
//! hook connected to widget's "draw" signal
static gboolean drawHook( GSignalInvocationHint*, guint, const GValue*, gpointer );
//! destruction callback
static gboolean destroyNotifyEvent( GtkWidget*, gpointer );
private:
//! true if hooks are initialized
bool _hooksInitialized;
//! hook connected to widget's "draw" signal
Hook _drawHook;
//! store current context
cairo_t* _context;
//! store list of associated widgets, to keep track of destruction
typedef std::list<GtkWidget*> WidgetList;
WidgetList _widgets;
//! keep track of all registered widgets, and associated destroy callback
typedef std::map< GtkWidget*, Signal > WidgetMap;
WidgetMap _allWidgets;
};
#endif
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