/*
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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*/

#ifndef __OverlayProfileSessionListener_H__
#define __OverlayProfileSessionListener_H__

#include "OgreOverlayPrerequisites.h"
#include "OgreProfiler.h"
#include "OgreOverlay.h"

namespace Ogre  {

	/** \addtogroup Core
	*  @{
	*/
	/** \addtogroup Overlays
	*  @{
	*/

	/** Concrete impl. of the ProfileSessionListener which visualizes
		the profling results using overlays.
	*/
	class _OgreOverlayExport OverlayProfileSessionListener : public ProfileSessionListener
	{
	public:
		OverlayProfileSessionListener();
		virtual ~OverlayProfileSessionListener();

		/// @see ProfileSessionListener::initializeSession
		virtual void initializeSession();

		/// @see ProfileSessionListener::finializeSession
		virtual void finializeSession();

		/// @see ProfileSessionListener::displayResults
		virtual void displayResults(const ProfileInstance& instance, ulong maxTotalFrameTime);

		/// @see ProfileSessionListener::changeEnableState
		virtual void changeEnableState(bool enabled);

		/** Set the size of the profiler overlay, in pixels. */
		void setOverlayDimensions(Real width, Real height);

		/** Set the position of the profiler overlay, in pixels. */
		void setOverlayPosition(Real left, Real top);

		Real getOverlayWidth() const;
		Real getOverlayHeight() const;
		Real getOverlayLeft() const;
		Real getOverlayTop() const;

	private:
		typedef list<OverlayElement*>::type ProfileBarList;

		/** Prints the profiling results of each frame 
		@remarks Recursive, for all the little children. */
		void displayResults(ProfileInstance* instance, ProfileBarList::const_iterator& bIter, Real& maxTimeMillisecs, Real& newGuiHeight, int& profileCount);

		/** An internal function to create the container which will hold our display elements*/
        OverlayContainer* createContainer();

        /** An internal function to create a text area */
        OverlayElement* createTextArea(const String& name, Real width, Real height, Real top, Real left, 
                                    uint fontSize, const String& caption, bool show = true);

        /** An internal function to create a panel */
        OverlayElement* createPanel(const String& name, Real width, Real height, Real top, Real left, 
                                const String& materialName, bool show = true);

        /// Holds the display bars for each profile results
        ProfileBarList mProfileBars;

		/// The overlay which contains our profiler results display
        Overlay* mOverlay;

        /// The window that displays the profiler results
        OverlayContainer* mProfileGui;

        /// The height of each bar
        Real mBarHeight;

        /// The height of the stats window
        Real mGuiHeight;

        /// The width of the stats window
        Real mGuiWidth;

		/// The horz position of the stats window
		Real mGuiLeft;

		/// The vertical position of the stats window
		Real mGuiTop;

		/// The size of the indent for each profile display bar
        Real mBarIndent;

        /// The width of the border between the profile window and each bar
        Real mGuiBorderWidth;

        /// The width of the min, avg, and max lines in a profile display
        Real mBarLineWidth;

		/// The distance between bars
		Real mBarSpacing;

        /// The max number of profiles we can display
        uint mMaxDisplayProfiles;
	};
}
#endif