generic_window.hpp

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * generic_window.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: generic_window.hpp 16457 2006-08-31 20:51:12Z hartman $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teulière <[e-mail]>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef GENERIC_WINDOW_HPP
#define GENERIC_WINDOW_HPP

#include "skin_common.hpp"
#include "../utils/var_bool.hpp"

class OSWindow;
class EvtGeneric;
class EvtFocus;
class EvtLeave;
class EvtMenu;
class EvtMotion;
class EvtMouse;
class EvtKey;
class EvtRefresh;
class EvtScroll;
class WindowManager;


/// Generic window class
class GenericWindow: public SkinObject, public Observer<VarBool>
{
    private:
        friend class WindowManager;
    public:
        GenericWindow( intf_thread_t *pIntf, int xPos, int yPos,
                       bool dragDrop, bool playOnDrop,
                       GenericWindow *pParent = NULL );
        virtual ~GenericWindow();

        /// Methods to process OS events.
        virtual void processEvent( EvtFocus &rEvtFocus ) {}
        virtual void processEvent( EvtMenu &rEvtMenu ) {}
        virtual void processEvent( EvtMotion &rEvtMotion ) {}
        virtual void processEvent( EvtMouse &rEvtMouse ) {}
        virtual void processEvent( EvtLeave &rEvtLeave ) {}
        virtual void processEvent( EvtKey &rEvtKey ) {}
        virtual void processEvent( EvtScroll &rEvtScroll ) {}

        virtual void processEvent( EvtRefresh &rEvtRefresh );

        /// Resize the window
        virtual void resize( int width, int height );

        /// Refresh an area of the window
        virtual void refresh( int left, int top, int width, int height ) {}

        /// Get the coordinates of the window
        int getLeft() const { return m_left; }
        int getTop() const { return m_top; }
        int getWidth() const { return m_width; }
        int getHeight() const { return m_height; }

        /// Give access to the visibility variable
        VarBool &getVisibleVar() { return *m_pVarVisible; }

        /// Window type, mainly useful when overloaded (for VoutWindow)
        virtual string getType() const { return "Generic"; }

    protected:
        /// Get the OS window
        OSWindow *getOSWindow() const { return m_pOsWindow; }

        /// These methods do not need to be public since they are accessed
        /// only by the window manager or by inheritant classes.
        //@{
        /// Show the window
        virtual void show() const;

        /// Hide the window
        virtual void hide() const;

        /// Move the window
        virtual void move( int left, int top );

        /// Bring the window on top
        virtual void raise() const;

        /// Set the opacity of the window (0 = transparent, 255 = opaque)
        virtual void setOpacity( uint8_t value );

        /// Toggle the window on top
        virtual void toggleOnTop( bool onTop ) const;
        //@}

        /// Actually show the window
        virtual void innerShow();

        /// Actually hide the window
        virtual void innerHide();

    private:
        /// Window position and size
        int m_left, m_top, m_width, m_height;
        /// OS specific implementation
        OSWindow *m_pOsWindow;
        /// Variable for the visibility of the window
        mutable VarBoolImpl *m_pVarVisible;

        /// Method called when the observed variable is modified
        virtual void onUpdate( Subject<VarBool> &rVariable , void*);
};


#endif