ctrl_list.hpp

video linux conference

/*****************************************************************************
 * ctrl_list.hpp
 *****************************************************************************
 * Copyright (C) 2003 VideoLAN
 * $Id: ctrl_list.hpp 11009 2005-05-14 14:39:05Z ipkiss $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teuli鑢e <[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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#ifndef CTRL_LIST_HPP
#define CTRL_LIST_HPP

#include "ctrl_generic.hpp"
#include "../utils/observer.hpp"
#include "../utils/var_list.hpp"

class OSGraphics;
class GenericFont;
class GenericBitmap;


/// Class for control list
class CtrlList: public CtrlGeneric, public Observer<VarList>,
    public Observer<VarPercent>
{
    public:
        CtrlList( intf_thread_t *pIntf, VarList &rList,
                  const GenericFont &rFont, const GenericBitmap *pBitmap,
                  uint32_t fgcolor, uint32_t playcolor, uint32_t bgcolor1,
                  uint32_t bgcolor2, uint32_t selColor,
                  const UString &rHelp, VarBool *pVisible );
        virtual ~CtrlList();

        /// Handle an event on the control.
        virtual void handleEvent( EvtGeneric &rEvent );

        /// Check whether coordinates are inside the control.
        virtual bool mouseOver( int x, int y ) const;

        /// Draw the control on the given graphics
        virtual void draw( OSGraphics &rImage, int xDest, int yDest );

        /// Called when the layout is resized
        virtual void onResize();

        /// Return true if the control can gain the focus
        virtual bool isFocusable() const { return true; }

        /// Get the type of control (custom RTTI)
        virtual string getType() const { return "list"; }

    private:
        /// List associated to the control
        VarList &m_rList;
        /// Font
        const GenericFont &m_rFont;
        /// Background bitmap
        /** If NULL, the 2 background colors defined below will be used */
        const GenericBitmap *m_pBitmap;
        /// Color of normal text
        uint32_t m_fgColor;
        /// Color of the playing item
        uint32_t m_playColor;
        /// Background colors, used when no background bitmap is given
        uint32_t m_bgColor1, m_bgColor2;
        /// Background of selected items
        uint32_t m_selColor;
        /// Pointer on the last selected item in the list
        VarList::Elem_t *m_pLastSelected;
        /// Image of the control
        OSGraphics *m_pImage;
        /// Last position
        int m_lastPos;

        /// Method called when the list variable is modified
        virtual void onUpdate( Subject<VarList> &rList );

        /// Method called when the position variable of the list is modified
        virtual void onUpdate( Subject<VarPercent> &rPercent );

        /// Called when the position is set
        virtual void onPositionChange();

        /// Check if the list must be scrolled
        void autoScroll();

        /// Draw the image of the control
        void makeImage();
};

#endif