kwin/clients/nitrogen/nitrogensizegrip.h

#ifndef nitrogensizegrip_h
#define nitrogensizegrip_h

//////////////////////////////////////////////////////////////////////////////
// nitrogensizegrip.h
// -------------------
// 
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.                 
//////////////////////////////////////////////////////////////////////////////

#include <QWidget>
#include <QPaintEvent>
#include <QMouseEvent>
#include <QMouseEvent>

namespace Nitrogen
{

  class NitrogenClient;

  //! implements size grip for all widgets
  class NitrogenSizeGrip: public QWidget
  {
    
    public: 
    
    //! constructor
    NitrogenSizeGrip( NitrogenClient* );
    
    //! constructor
    virtual ~NitrogenSizeGrip( void );
    
    //! event filter
    virtual bool eventFilter( QObject*, QEvent* );

    public slots:
    
    //! update background color
    void activeChange( void );

    protected slots:
    
    //! embed into parent widget
    void embed( void );
    
    protected:
    
    //!@name event handlers
    //@{
    
    //! paint
    virtual void paintEvent( QPaintEvent* );
    
    //! mouse press
    virtual void mousePressEvent( QMouseEvent* );
   
    //@}
        
    //! client
    NitrogenClient& client( void ) const
    { return *client_; }
    
    //! update position
    void updatePosition( void );
    
    private:
    
    //! grip size
    enum { 
      OFFSET = 1,
      GRIP_SIZE = 15 
    };
      
    // nitrogen client
    NitrogenClient* client_;
    
    //! true when decoration offset must be accounted for when moving the widget
    bool decoration_offset_;
        
  };
  
  
}

#endif