ctrl_checkbox.hpp

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * ctrl_checkbox.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: ctrl_checkbox.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 CTRL_CHECKBOX_HPP
#define CTRL_CHECKBOX_HPP

#include "ctrl_generic.hpp"
#include "../utils/fsm.hpp"
#include "../utils/observer.hpp"
#include "../src/anim_bitmap.hpp"

class GenericBitmap;
class OSGraphics;
class CmdGeneric;


/// Base class for checkbox controls
class CtrlCheckbox: public CtrlGeneric, public Observer<AnimBitmap>
{
    public:
        /// Create a checkbox with 6 images
        CtrlCheckbox( intf_thread_t *pIntf,
                      const GenericBitmap &rBmpUp1,
                      const GenericBitmap &rBmpOver1,
                      const GenericBitmap &rBmpDown1,
                      const GenericBitmap &rBmpUp2,
                      const GenericBitmap &rBmpOver2,
                      const GenericBitmap &rBmpDown2,
                      CmdGeneric &rCommand1, CmdGeneric &rCommand2,
                      const UString &rTooltip1, const UString &rTooltip2,
                      VarBool &rVariable, const UString &rHelp,
                      VarBool *pVisible);

        virtual ~CtrlCheckbox();

        /// Handle an event
        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 );

        /// Get the text of the tooltip XXX
        virtual UString getTooltipText() const { return *m_pTooltip; }

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

    private:
        /// Finite state machine of the control
        FSM m_fsm;
        /// Observed variable
        VarBool &m_rVariable;
        /// Commands for the 2 states
        CmdGeneric &m_rCommand1, &m_rCommand2;
        /// Current command
        CmdGeneric *m_pCommand;
        /// Tooltip texts for the 2 states
        const UString m_tooltip1, m_tooltip2;
        /// Current tooltip
        const UString *m_pTooltip;
         /// Images of the checkbox in the different states
        AnimBitmap m_imgUp1, m_imgOver1, m_imgDown1;
        AnimBitmap m_imgUp2, m_imgOver2, m_imgDown2;
        /// Current set of images (pointing to 1 or 2)
        /// In fact, we consider here that a checkbox acts like 2 buttons, in a
        /// symetric way; this is a small trick to avoid multiplicating the
        /// callbacks (and it could be extended easily to support 3 buttons or
        /// more...)
        AnimBitmap *m_pImgUp, *m_pImgOver, *m_pImgDown;
        /// Current image
        AnimBitmap *m_pImgCurrent;

        /// Callback objects
        DEFINE_CALLBACK( CtrlCheckbox, UpOverDownOver )
        DEFINE_CALLBACK( CtrlCheckbox, DownOverUpOver )
        DEFINE_CALLBACK( CtrlCheckbox, DownOverDown )
        DEFINE_CALLBACK( CtrlCheckbox, DownDownOver )
        DEFINE_CALLBACK( CtrlCheckbox, UpOverUp )
        DEFINE_CALLBACK( CtrlCheckbox, UpUpOver )
        DEFINE_CALLBACK( CtrlCheckbox, DownUp )
        DEFINE_CALLBACK( CtrlCheckbox, UpHidden )
        DEFINE_CALLBACK( CtrlCheckbox, HiddenUp )

        /// Method called when the observed variable is modified
        virtual void onVarBoolUpdate( VarBool &rVariable );

        /// Method called when an animated bitmap changes
        virtual void onUpdate( Subject<AnimBitmap> &rBitmap, void* );

        /// Change the current image
        void setImage( AnimBitmap *pImg );

        /// Helper function to update the current state of images
        void changeButton();
};


#endif