/** 
 * @file llmultislider.h
 * @brief A simple multislider
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * 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;
 * version 2.1 of the License only.
 * 
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_MULTI_SLIDER_H
#define LL_MULTI_SLIDER_H

#include "llf32uictrl.h"
#include "v4color.h"

class LLUICtrlFactory;

class LLMultiSlider : public LLF32UICtrl
{
public:
	struct SliderParams : public LLInitParam::Block<SliderParams>
	{
		Optional<std::string>	name;
		Mandatory<F32>			value;
		SliderParams();
	};

	struct Params : public LLInitParam::Block<Params, LLF32UICtrl::Params>
	{
		Optional<S32>	max_sliders;

		Optional<bool>	allow_overlap,
						loop_overlap,
						draw_track,
						use_triangle;

		Optional<F32>	overlap_threshold;

		Optional<LLUIColor>	track_color,
							thumb_disabled_color,
							thumb_highlight_color,
							thumb_outline_color,
							thumb_center_color,
							thumb_center_selected_color,
							triangle_color;

		Optional<std::string>	orientation,
								thumb_image;

		Optional<CommitCallbackParam>	mouse_down_callback,
										mouse_up_callback;
		Optional<S32>		thumb_width;

		Multiple<SliderParams>	sliders;
		Params();
	};

protected:
	LLMultiSlider(const Params&);
	friend class LLUICtrlFactory;
public:
	virtual ~LLMultiSlider();

    // Multi-slider rounds values to nearest increments (bias towards rounding down)
    F32					getNearestIncrement(F32 value) const;

	void				setSliderValue(const std::string& name, F32 value, BOOL from_event = FALSE);
	F32					getSliderValue(const std::string& name) const;
	F32					getSliderValueFromPos(S32 xpos, S32 ypos) const;
    LLRect              getSliderThumbRect(const std::string& name) const;

    void                setSliderThumbImage(const std::string &name);
    void                clearSliderThumbImage();


	const std::string&	getCurSlider() const					{ return mCurSlider; }
	F32					getCurSliderValue() const				{ return getSliderValue(mCurSlider); }
	void				setCurSlider(const std::string& name);
	void				resetCurSlider();
	void				setCurSliderValue(F32 val, BOOL from_event = false) { setSliderValue(mCurSlider, val, from_event); }

	/*virtual*/ void	setValue(const LLSD& value) override;
	/*virtual*/ LLSD	getValue() const override { return mValue; }

	boost::signals2::connection setMouseDownCallback( const commit_signal_t::slot_type& cb );
	boost::signals2::connection setMouseUpCallback(	const commit_signal_t::slot_type& cb );

	bool				findUnusedValue(F32& initVal);
	const std::string&	addSlider();
	const std::string&	addSlider(F32 val);
	bool				addSlider(F32 val, const std::string& name);
	void				deleteSlider(const std::string& name);
	void				deleteCurSlider()			{ deleteSlider(mCurSlider); }
	/*virtual*/ void	clear() override;

	/*virtual*/ BOOL	handleHover(S32 x, S32 y, MASK mask) override;
	/*virtual*/ BOOL	handleMouseUp(S32 x, S32 y, MASK mask) override;
	/*virtual*/ BOOL	handleMouseDown(S32 x, S32 y, MASK mask) override;
	/*virtual*/ BOOL	handleKeyHere(KEY key, MASK mask) override;
	/*virtual*/ void	onMouseLeave(S32 x, S32 y, MASK mask) override;
	/*virtual*/ void	draw() override;

	S32				getMaxNumSliders() { return mMaxNumSliders; }
	S32				getCurNumSliders() { return mValue.size(); }
	F32				getOverlapThreshold() { return mOverlapThreshold; }
	bool			canAddSliders() { return mValue.size() < mMaxNumSliders; }


protected:
	LLSD			mValue;
	std::string		mCurSlider;
	std::string		mHoverSlider;
	static S32		mNameCounter;

	S32				mMaxNumSliders;
	BOOL			mAllowOverlap;
	BOOL			mLoopOverlap;
	F32				mOverlapThreshold;
	BOOL			mDrawTrack;
	BOOL			mUseTriangle;			/// hacked in toggle to use a triangle

	S32				mMouseOffset;
	LLRect			mDragStartThumbRect;
	S32				mThumbWidth;

	std::map<std::string, LLRect>	
					mThumbRects;
	LLUIColor		mTrackColor;
	LLUIColor		mThumbOutlineColor;
	LLUIColor		mThumbHighlightColor;
	LLUIColor		mThumbCenterColor;
	LLUIColor		mThumbCenterSelectedColor;
	LLUIColor		mDisabledThumbColor;
	LLUIColor		mTriangleColor;
	LLUIImagePtr	mThumbImagep; //blimps on the slider, for now no 'disabled' support
    LLUIImagePtr	mRoundedSquareImgp; //blimps on the slider, for now no 'disabled' support

	const EOrientation	mOrientation;

	commit_signal_t*	mMouseDownSignal;
	commit_signal_t*	mMouseUpSignal;
};

#endif  // LL_MULTI_SLIDER_H
