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

/************************************************************************
        filename:       CEGUIPushButton.h
        created:        13/4/2004
        author:         Paul D Turner
        
        purpose:        Interface to base class for PushButton 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 _CEGUIPushButton_h_
#define _CEGUIPushButton_h_

#include "CEGUIBase.h"
#include "elements/CEGUIButtonBase.h"
#include "elements/CEGUIPushButtonProperties.h"
#include "CEGUIRenderableImage.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 logic for push button type widgets.
*/
class CEGUIEXPORT PushButton : public ButtonBase
{
public:
        static const String EventNamespace;                             //!< Namespace for global events


        /*************************************************************************
                Event name constants
        *************************************************************************/
        // generated internally by Window
        static const String EventClicked;                                       //!< The button was clicked.

        /*************************************************************************
                Construction and Destruction
        *************************************************************************/
        /*!
        \brief
                Constructor for base PushButton class
        */
        PushButton(const String& type, const String& name);


        /*!
        \brief
                Destructor for PushButton class
        */
        virtual ~PushButton(void);

    /*************************************************************************
        Common Public Interface
    *************************************************************************/
        /*!
        \brief
                return whether or not rendering of the standard imagery is enabled.

        \return
                true if the standard button imagery will be rendered, false if no standard rendering will be performed.
        */
        bool    isStandardImageryEnabled(void) const;


        /*!
        \brief
                Return whether of not custom button image areas are auto-scaled to the size of the button.

        \return
                true if client specified custom image areas are re-sized when the button size changes.  false if image areas will
                remain unchanged when the button is sized.
        */
        bool    isCustomImageryAutoSized(void) const;

    /*!
        \brief
                returns a pointer to a read-only RenderableImage object holding the details
        of the image set to render for the button in the normal state, or 0 if no
        image is currently set for this state.

        \return
                Pointer to a const RenderableImage object with all the details for the image.  
        */
        const RenderableImage*  getNormalImage(void) const;

        /*!
        \brief
        returns a pointer to a read-only RenderableImage object holding the details
        of the image set to render for the button in the highlighted state, or 0 if no
        image is currently set for this state.

        \return
                Pointer to a const RenderableImage object with all the details for the image.  
        */
        const RenderableImage*  getHoverImage(void) const;

        /*!
        \brief
        returns a pointer to a read-only RenderableImage object holding the details
        of the image set to render for the button in the pushed state, or 0 if no
        image is currently set for this state.

        \return
                Pointer to a const RenderableImage object with all the details for the image.  
        */
        const RenderableImage*  getPushedImage(void) const;

        /*!
        \brief
        returns a pointer to a read-only RenderableImage object holding the details
        of the image set to render for the button in the disabled state, or 0 if no
        image is currently set for this state.

        \return
                Pointer to a const RenderableImage object with all the details for the image.  
        */
        const RenderableImage*  getDisabledImage(void) const;

    /*!
    \brief
        get the offset that is used to shift of the text in the x-direction
        this is useful if the button-images are not symmetrical and the
        text shouldn't be completely centered

    \return
        the offset relative to the button-size
    */
    float   getTextXOffset(void) const;

        /*!
        \brief
                set whether or not to render the standard imagery for the button

        \param setting
                true to have the standard button imagery drawn, false to have no standard imagery drawn.

        \return
                Nothing.
        */
        void    setStandardImageryEnabled(bool setting);

        /*!
        \brief
                Set whether to auto re-size custom image areas when the button is sized.

        \param setting
                true to have custom image areas auto-sized.  false to have system leave image areas untouched.

        \return
                Nothing.
        */
        void    setCustomImageryAutoSized(bool setting);

        /*!
        \brief
                set the details of the image to render for the button in the normal state.

        \param image
                RenderableImage object with all the details for the image.  Note that an internal copy of the Renderable image is made and
                ownership of \a image remains with client code.  If this parameter is NULL, rendering of an image for this button state is
                disabled.

        \return
                Nothing.
        */
        void    setNormalImage(const RenderableImage* image);

        /*!
        \brief
                set the details of the image to render for the button in the highlighted state.

        \param image
                RenderableImage object with all the details for the image.  Note that an internal copy of the Renderable image is made and
                ownership of \a image remains with client code.  If this parameter is NULL, rendering of an image for this button state is
                disabled.

        \return
                Nothing.
        */
        void    setHoverImage(const RenderableImage* image);

        /*!
        \brief
                set the details of the image to render for the button in the pushed state.

        \param image
                RenderableImage object with all the details for the image.  Note that an internal copy of the Renderable image is made and
                ownership of \a image remains with client code.  If this parameter is NULL, rendering of an image for this button state is
                disabled.

        \return
                Nothing.
        */
        void    setPushedImage(const RenderableImage* image);

        /*!
        \brief
                set the details of the image to render for the button in the disabled state.

        \param image
                RenderableImage object with all the details for the image.  Note that an internal copy of the Renderable image is made and
                ownership of \a image remains with client code.  If this parameter is NULL, rendering of an image for this button state is
                disabled.

        \return
                Nothing.
        */
        void    setDisabledImage(const RenderableImage* image);

    /*!
    \brief
        set the offset to use for a shift of the text in the x-direction
        this is useful if the button-images are not symmetrical and the
        text shouldn't be completely centered

    \param offset
        The offset to use. This is relative to the button-width

    \return
        Nothing.
    */
    void   setTextXOffset(float offset);

protected:
        /*************************************************************************
                New Event Handlers
        *************************************************************************/
        /*!
        \brief
                handler invoked internally when the button is clicked.
        */
        virtual void    onClicked(WindowEventArgs& e);


        /*************************************************************************
                Overridden Event Handlers
        *************************************************************************/
        virtual void    onMouseButtonUp(MouseEventArgs& e);
    virtual void    onSized(WindowEventArgs& e);


        /*************************************************************************
                Implementation Functions
        *************************************************************************/
        /*!
        \brief
                Add button specific events
        */
        void    addPushButtonEvents(void);


        /*!
        \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*)"PushButton")      return true;
                return ButtonBase::testClassName_impl(class_name);
        }


    /*************************************************************************
        Data Fields
    *************************************************************************/
    // flags stating which imagery is to be rendered and how.
    bool        d_autoscaleImages;                              //!< when true custom images will be scaled to the same size as the button
    bool        d_useStandardImagery;                   //!< true if button standard imagery should be drawn.
    bool        d_useNormalImage;                               //!< true if an image should be drawn for the normal state.
    bool        d_useHoverImage;                                //!< true if an image should be drawn for the highlighted state.
    bool        d_usePushedImage;                               //!< true if an image should be drawn for the pushed state.
    bool        d_useDisabledImage;                             //!< true if an image should be drawn for the disabled state.

    // button RenderableImage objects
    RenderableImage             d_normalImage;          //!< RenderableImage used when rendering an image in the normal state.
    RenderableImage             d_hoverImage;           //!< RenderableImage used when rendering an image in the highlighted state.
    RenderableImage             d_pushedImage;          //!< RenderableImage used when rendering an image in the pushed state.
    RenderableImage             d_disabledImage;        //!< RenderableImage used when rendering an image in the disabled state.

    //text-offset
    float d_textXOffset;                //!< offset applied to the x co-ordinate of the text label.

private:
    /*************************************************************************
        Static Properties for this class
    *************************************************************************/
    static PushButtonProperties::NormalImage    d_normalImageProperty;
    static PushButtonProperties::PushedImage    d_pushedImageProperty;
    static PushButtonProperties::HoverImage     d_hoverImageProperty;
    static PushButtonProperties::DisabledImage  d_disabledImageProperty;
    static PushButtonProperties::UseStandardImagery d_useStandardImageryProperty;
    static PushButtonProperties::TextXOffset    d_textXOffsetProperty;

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


} // End of  CEGUI namespace section

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

#endif  // end of guard _CEGUIPushButton_h_