source: GTP/trunk/Lib/Geom/OgreStuff/include/CEGUI/elements/CEGUIRadioButton.h @ 1809

/************************************************************************
        filename:       CEGUIRadioButton.h
        created:        13/4/2004
        author:         Paul D Turner
        
        purpose:        Interface to base class for RadioButton widget
*************************************************************************/
/*************************************************************************
    Crazy Eddie's GUI System (http://www.cegui.org.uk)
    Copyright (C)2004 - 2005 Paul D Turner (paul@cegui.org.uk)

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*************************************************************************/
#ifndef _CEGUIRadioButton_h_
#define _CEGUIRadioButton_h_

#include "CEGUIBase.h"
#include "elements/CEGUIButtonBase.h"
#include "elements/CEGUIRadioButtonProperties.h"


#if defined(_MSC_VER)
#       pragma warning(push)
#       pragma warning(disable : 4251)
#endif


// Start of CEGUI namespace section
namespace CEGUI
{
/*!
\brief
        Base class to provide the logic for Radio Button widgets.

*/
class CEGUIEXPORT RadioButton : public ButtonBase
{
public:
        static const String EventNamespace;                             //!< Namespace for global events


        /*************************************************************************
                Event name constants
        *************************************************************************/
        // generated internally by Window
        static const String EventSelectStateChanged;                    //!< The selected state of the widget has changed.


        /*************************************************************************
                Accessor Functions
        *************************************************************************/ 
        /*!
        \brief
                return true if the radio button is selected (has the checkmark)

        \return
                true if this widget is selected, false if the widget is not selected.
        */
        bool    isSelected(void) const                          {return d_selected;}

        
        /*!
        \brief
                return the groupID assigned to this radio button

        \return
                ulong value that identifies the Radio Button group this widget belongs to.
        */
        ulong   getGroupID(void) const                          {return d_groupID;}


        /*!
        \brief
                Return a pointer to the RadioButton object within the same group as this RadioButton, that
                is currently selected.

        \return
                Pointer to the RadioButton object that is the RadioButton within the same group as this RadioButton,
                and is attached to the same parent window as this RadioButton, that is currently selected.
                Returns NULL if no button within the group is selected, or if 'this' is not attached to a parent window.
        */
        RadioButton*    getSelectedButtonInGroup(void) const;


        /*************************************************************************
                Manipulator Functions
        *************************************************************************/
        /*!
        \brief
                set whether the radio button is selected or not

        \param select
                true to put the radio button in the selected state, false to put the radio button in the
                deselected state.  If changing to the selected state, any previously selected radio button
                within the same group is automatically deselected.

        \return
                Nothing.
        */
        void    setSelected(bool select);

        
        /*!
        \brief
                set the groupID for this radio button

        \param group
                ulong value specifying the radio button group that this widget belongs to.

        \return 
                Nothing.
        */
        void    setGroupID(ulong group);


        /*************************************************************************
                Construction / Destruction
        *************************************************************************/
        RadioButton(const String& type, const String& name);
        virtual ~RadioButton(void);


protected:
        /*************************************************************************
                Implementation Functions
        *************************************************************************/
        /*!
        \brief
                Add radio button specific events
        */
        void    addRadioButtonEvents(void);


        /*!
        \brief
                Deselect any selected radio buttons attached to the same parent within the same group
                (but not do not deselect 'this').
        */
        void    deselectOtherButtonsInGroup(void) const;


        /*!
        \brief
                Return whether this window was inherited from the given class name at some point in the inheritance heirarchy.

        \param class_name
                The class name that is to be checked.

        \return
                true if this window was inherited from \a class_name. false if not.
        */
        virtual bool    testClassName_impl(const String& class_name) const
        {
                if (class_name==(const utf8*)"RadioButton")     return true;
                return ButtonBase::testClassName_impl(class_name);
        }


        /*************************************************************************
                New Radio Button Events
        *************************************************************************/
        /*!
        \brief
                event triggered internally when the select state of the button changes.
        */
        virtual void    onSelectStateChanged(WindowEventArgs& e);


        /*************************************************************************
                Overridden Event handlers
        *************************************************************************/
        virtual void    onMouseButtonUp(MouseEventArgs& e);


        /*************************************************************************
                Implementation Data
        *************************************************************************/
        bool            d_selected;                             // true when radio button is selected (has checkmark)
        ulong           d_groupID;                              // radio button group ID


private:
        /*************************************************************************
                Static Properties for this class
        *************************************************************************/
        static RadioButtonProperties::Selected  d_selectedProperty;
        static RadioButtonProperties::GroupID   d_groupIDProperty;


        /*************************************************************************
                Private methods
        *************************************************************************/
        void    addRadioButtonProperties(void);
};


} // End of  CEGUI namespace section

#if defined(_MSC_VER)
#       pragma warning(pop)
#endif

#endif  // end of guard _CEGUIRadioButton_h_