source: GTP/trunk/App/Demos/Geom/include/CEGUI/elements/CEGUIProgressBar.h @ 1030

/************************************************************************
        filename:       CEGUIProgressBar.h
        created:        13/4/2004
        author:         Paul D Turner
        
        purpose:        Interface to base class for ProgressBar 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 _CEGUIProgressBar_h_
#define _CEGUIProgressBar_h_

#include "CEGUIBase.h"
#include "CEGUIWindow.h"
#include "elements/CEGUIProgressBarProperties.h"


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


// Start of CEGUI namespace section
namespace CEGUI
{
/*!
\brief
        Base class for progress bars.
*/
class CEGUIEXPORT ProgressBar : public Window
{
public:
        static const String EventNamespace;                             //!< Namespace for global events


        /*************************************************************************
                Event name constants
        *************************************************************************/
        static const String EventProgressChanged;               //!< Event fired whenever the progress value changes.
        static const String EventProgressDone;          //!< Event fired when the progress bar reaches 100%.    


        /************************************************************************
                Accessor Functions
        ************************************************************************/
        /*!
        \brief
                return the current progress value
        */
        float   getProgress(void) const         {return d_progress;}

        /*!
        \brief
                return the current step size
        */
        float   getStep(void) const                     {return d_step;}


        /*************************************************************************
                Manipulator Functions
        *************************************************************************/
        /*!
        \brief
                set the current progress.

        \param progress
                The level of progress to set.  If this value is >1.0f (100%) progress will be limited to 1.0f.

        \return
                Nothing.
        */
        void    setProgress(float progress);


        /*!
        \brief
                set the size of the 'step' in percentage points (default is 0.01f or 1%).

        \param step
                Amount to increase the progress by each time the step method is called.

        \return
                Nothing.
        */
        void    setStepSize(float step)         {d_step = step;}


        /*!
        \brief
                cause the progress to step

                The amount the progress bar will step can be changed by calling the setStepSize method.  The
                default step size is 0.01f which is equal to 1%.
        
        \return
                Nothing.
        */
        void    step(void)                      {setProgress(d_progress + d_step);}


        /*!
        \brief
                Modify the progress level by a specified delta.

        \param delta
                amount to adjust the progress by.  Whatever this value is, the progress of the bar will be kept
                within the range: 0.0f <= progress <= 1.0f.

        \return
                Nothing.
        */
        void    adjustProgress(float delta)             {setProgress(d_progress + delta);}


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


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


protected:
        /*************************************************************************
                Implementation methods
        *************************************************************************/
        /*!
        \brief
                Add progress bar specific events to the window
        */
        void    addProgressBarEvents(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*)"ProgressBar")     return true;
                return Window::testClassName_impl(class_name);
        }


        /*************************************************************************
                Event handlers for progress bar specific events
        *************************************************************************/
        /*!
        \brief
                event triggered when progress changes
        */
        virtual void    onProgressChanged(WindowEventArgs& e);


        /*!
        \brief
                event triggered when progress reaches 100%
        */
        virtual void    onProgressDone(WindowEventArgs& e);


        /*************************************************************************
                Implementation Data
        *************************************************************************/
        float   d_progress;             //!< current progress (from 0.0f to 1.0f)
        float   d_step;                 //!< amount to 'step' progress by on a call to step()


private:
        /*************************************************************************
                Static Properties for this class
        *************************************************************************/
        static ProgressBarProperties::CurrentProgress   d_currentProgressProperty;
        static ProgressBarProperties::StepSize                  d_stepSizeProperty;


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


} // End of  CEGUI namespace section

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

#endif  // end of guard _CEGUIProgressBar_h_