ctrl_checkbox.hpp

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/*****************************************************************************
 * ctrl_checkbox.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: 7342bf0ae0e9b9ae8ad4ecb72ff36c19873ba75b $
 *
 * Authors: Cyril Deguet     <asmax@via.ecp.fr>
 *          Olivier Teulière <ipkiss@via.ecp.fr>
 *
 * 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