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diff --git a/utils/hlfaceposer/expressiontool.h b/utils/hlfaceposer/expressiontool.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef EXPRESSIONTOOL_H
+#define EXPRESSIONTOOL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include <mxtk/mx.h>
+#include "studio.h"
+#include "utlvector.h"
+#include "tier1/utldict.h"
+#include "faceposertoolwindow.h"
+
+class CChoreoEvent;
+class TimelineItem;
+class CFlexAnimationTrack;
+class CExpClass;
+class CChoreoWidgetDrawHelper;
+class CExpressionToolWorkspace;
+class CChoreoView;
+class CFlexTimingTag;
+class CExpression;
+class mxSlider;
+
+#define IDC_EXPRESSIONTOOLVSCROLL	1000
+#define IDC_ADDTRACKS				1001
+#define IDC_COLLAPSEALL				1002
+#define IDC_EXPANDALL				1003
+#define IDC_EXPANDVALID				1004
+#define IDC_INSERT_TIMING_TAG		1005
+#define IDC_DELETE_TIMING_TAG		1006
+#define IDC_LOCK_TIMING_TAG			1007
+#define IDC_UNLOCK_TIMING_TAG		1008
+
+#define IDC_COPY_TO_FLEX			1009
+#define IDC_COPY_FROM_FLEX			1010
+
+#define	IDC_NEW_EXPRESSION_FROM_FLEXANIMATION 1011
+
+#define IDC_EXPORT_FA				1012
+#define IDC_IMPORT_FA				1013
+
+#define IDC_REDO_FA					1014
+#define IDC_UNDO_FA					1015
+
+#define IDC_TL_COPY					1016
+#define IDC_TL_PASTE				1017
+#define IDC_TL_DELETE				1018
+#define IDC_TL_DESELECT				1019
+#define IDC_TL_SELECTALL			1020
+
+#define IDC_TL_COLLAPSE				1021
+#define IDC_TL_EXPAND				1022
+#define IDC_TL_ENABLE				1023
+#define IDC_TL_DISABLE				1024
+
+#define IDC_TL_EDITNORMAL			1025
+#define IDC_TL_EDITLEFTRIGHT		1026
+
+#define IDC_COLLAPSE_ALL_EXCEPT		1027
+#define IDC_DISABLE_ALL_EXCEPT		1028
+#define IDC_ENABLE_ALL_VALID		1029
+
+#define IDC_TL_SNAPSELECTED			1030
+#define IDC_TL_SNAPPOINTS			1031
+#define IDC_TL_DELETECOLUMN			1032
+#define IDC_TL_SNAPALL				1033
+
+#define IDC_FLEX_CHANGESCALE		1034
+#define	IDC_FLEXHSCROLL				1035
+
+#define IDC_ET_SORT_BY_USED			1036
+#define IDC_ET_SORT_BY_NAME			1037
+
+#define IDC_ET_SELECTION_DELETE		1038
+#define IDC_ET_SELECTION_EXCISE		1039
+
+#define IDC_ET_RESET_ITEM_SIZE		1040
+#define IDC_ET_RESET_ALL_ITEM_SIZES	1041
+
+#define IDC_FLEX_SCALESAMPLES		1042
+
+#define IDC_TL_KB_TENSION			1050
+#define IDC_TL_KB_BIAS				1051
+#define IDC_TL_KB_CONTINUITY		1052
+
+#define IDC_ET_EDGEPROPERTIES		1053
+#define IDC_ET_SELECTION_COPY		1054
+#define IDC_ET_SELECTION_PASTE		1055
+
+#include "ExpressionSample.h"
+
+class ExpressionTool : public mxWindow, public IFacePoserToolWindow
+{
+public:
+	// Construction
+						ExpressionTool( mxWindow *parent );
+						~ExpressionTool( void );
+
+	virtual void		Think( float dt );
+	void				ScrubThink( float dt, bool scrubbing );
+	virtual bool		IsScrubbing( void ) const;
+	virtual bool		IsProcessing( void );
+
+
+	virtual int			handleEvent( mxEvent *event );
+	virtual void		redraw( void );
+	virtual bool		PaintBackground();
+
+	bool				SetFlexAnimationTrackFromExpression( int mx, int my, CExpClass *cl, CExpression *exp );
+
+	void				SetEvent( CChoreoEvent *event );
+
+	bool				HasCopyData( void );
+
+	void				Copy( CFlexAnimationTrack *source );
+	void				Paste( CFlexAnimationTrack *destination );
+
+	void				GetScrubHandleRect( RECT& rcHandle, bool clipped = false );
+	void				DrawScrubHandle( CChoreoWidgetDrawHelper& drawHelper, RECT& rcHandle );
+	void				DrawEventEnd( CChoreoWidgetDrawHelper& drawHelper );
+
+	CChoreoEvent		*GetSafeEvent( void );
+	
+	void				ExpandAll( void );
+	void				ExpandValid( void );
+
+	void				LayoutItems( bool force = false );
+
+	void				OnCopyToFlex( bool isEdited );
+	void				OnCopyFromFlex( bool isEdited );
+
+	void				OnCopyToFlex( float scenetime, bool isEdited );
+	void				OnCopyFromFlex( float scenetime, bool isEdited );
+	void				OnSetSingleKeyFromFlex( char const *sliderName );
+
+	void				OnNewExpression( void );
+	void				ShowContextMenu( mxEvent *event, bool include_track_menus );
+
+	void				ForceScrubPosition( float newtime );
+	void				ForceScrubPositionFromSceneTime( float scenetime );
+
+	void				SetScrubTime( float t );
+	void				SetScrubTargetTime( float t );
+
+	void				DrawScrubHandles();
+
+	void				SetClickedPos( int x, int y );
+	float				GetTimeForClickedPos( void );
+
+	void				SetMouseOverPos( int x, int y );
+	void				GetMouseOverPos( int &x, int& y );
+	void				GetMouseOverPosRect( RECT& rcPos );
+	void				DrawMouseOverPos( CChoreoWidgetDrawHelper& drawHelper, RECT& rcPos );
+	void				DrawMouseOverPos();
+
+
+	void				MoveSelectedSamples( float dfdx, float dfdy, bool snap );
+	void				DeleteSelectedSamples( void );
+	int					CountSelectedSamples( void );
+	void				DeselectAll( void );
+
+	void				RepositionHSlider( void );
+
+	bool				IsFocusItem( TimelineItem *item );
+	virtual void		OnModelChanged();
+
+	float				GetScrub() const { return m_flScrub; }
+	float				GetScrubberSceneTime();
+
+	void				GetTimelineItems( CUtlVector< TimelineItem * >& list );
+	void				InvalidateLayout( void );
+
+private:
+	void				DoTrackLookup( CChoreoEvent *event );
+
+	void				AddFlexTimingTag( int mx );
+	void				DeleteFlexTimingTag( int mx, int my );
+
+	void				OnSortByUsed( void );
+	void				OnSortByName( void );
+
+	void				OnDeleteSelection( bool excise_time );
+	void				OnResetItemSize();
+	void				OnResetAllItemSizes();
+	void				ResampleControlPoints( CFlexTimingTag *tag, float newposition );
+
+	void				OnScaleSamples();
+
+	void				LockTimingTag( void );
+	void				UnlockTimingTag( void );
+
+	bool				GetTimingTagRect( RECT& rcClient, CChoreoEvent *event, CFlexTimingTag *tag, RECT& rcTag );
+
+//	float				MouseToFrac( int mx );
+//float				MouseToTime( int mx );
+//	int					TimeToMouse( float t );
+
+	void				GetWorkspaceLeftRight( int& left, int& right );
+
+	bool				IsMouseOverScrubHandle( mxEvent *event );
+	CFlexTimingTag		*IsMouseOverTag( int mx, int my );
+
+	void				DrawRelativeTags( CChoreoWidgetDrawHelper& drawHelper );
+
+	void				DrawFocusRect( void );
+
+	void				ApplyBounds( int& mx, int& my );
+	void				CalcBounds( int movetype );
+
+	void				OnExportFlexAnimation( void );
+	void				OnImportFlexAnimation( void );
+
+	void				OnUndo( void );
+	void				OnRedo( void );
+
+	void				StartDragging( int dragtype, int startx, int starty, HCURSOR cursor );
+	void				GetWorkspaceRect( RECT &rc );
+	void				AddFocusRect( RECT& rc );
+	void				OnMouseMove( mxEvent *event );
+
+	// Mouse control over selected samples
+	void				SelectPoints( float starttime, float endtime );
+	void				FinishSelect( int startx, int mx );
+	void				FinishMoveSelection( int startx, int mx );
+	void				FinishMoveSelectionStart( int startx, int mx );
+	void				FinishMoveSelectionEnd( int startx, int mx );
+
+	// In general over the point area tray
+	bool				IsMouseOverPoints( int mx, int my );
+	// Specifically over selected points
+	bool				IsMouseOverSelection( int mx, int my );
+	bool				IsMouseOverSelectionStartEdge( mxEvent *event );
+	bool				IsMouseOverSelectionEndEdge( mxEvent *event );
+
+	// Readjust slider
+	void				MoveTimeSliderToPos( int x );
+	void				OnChangeScale();
+	int					ComputeHPixelsNeeded( void );
+	float				GetTimeValueForMouse( int mx, bool clip = false );
+
+	void				OnEdgeProperties();
+
+public:
+	int					GetPixelForTimeValue( float time, bool *clipped = NULL );
+	float				GetPixelsPerSecond( void );
+	void				GetStartAndEndTime( float& st, float& ed );
+	float				GetEventEndTime();
+
+private:
+
+	class CColumnCopier
+	{
+	public:
+		class CTrackData
+		{
+		public:
+			CTrackData() {};
+			CTrackData( const CTrackData& other )
+			{
+				m_Samples[ 0 ].CopyArray( other.m_Samples[ 0 ].Base(), other.m_Samples[ 0 ].Count() );
+				m_Samples[ 1 ].CopyArray( other.m_Samples[ 1 ].Base(), other.m_Samples[ 1 ].Count() );
+			}
+			CUtlVector< CExpressionSample > m_Samples[ 2 ];
+		};
+
+		bool					m_bActive;
+		float					m_flCopyTimes[ 2 ];
+		CUtlDict< CTrackData, int >	m_Data;
+
+		CColumnCopier() : m_bActive( false )
+		{
+			m_flCopyTimes[ 0 ] = m_flCopyTimes[ 1 ] = 0.0f;
+		}
+
+		void Reset()
+		{
+			m_bActive = false;
+			m_flCopyTimes[ 0 ] = m_flCopyTimes[ 1 ] = 0.0f;
+			m_Data.Purge();
+		}
+	};
+
+	bool				HasCopiedColumn();
+	void				OnCopyColumn();
+	void				OnPasteColumn();
+	void				ClearColumnCopy();
+
+	CColumnCopier		m_ColumnCopy;
+
+	int					m_nFocusEventGlobalID;
+
+	float				m_flScrub;
+	float				m_flScrubTarget;
+
+	enum
+	{
+		DRAGTYPE_NONE = 0,
+		DRAGTYPE_SCRUBBER,
+		DRAGTYPE_FLEXTIMINGTAG,
+
+		DRAGTYPE_SELECTSAMPLES,
+		DRAGTYPE_MOVESELECTION,
+		DRAGTYPE_MOVESELECTIONSTART,
+		DRAGTYPE_MOVESELECTIONEND,
+	};
+
+	HCURSOR				m_hPrevCursor;
+	int					m_nDragType;
+
+	int					m_nStartX;
+	int					m_nStartY;
+	int					m_nLastX;
+	int					m_nLastY;
+
+	int					m_nClickedX;
+	int					m_nClickedY;
+
+	bool				m_bUseBounds;
+	int					m_nMinX;
+	int					m_nMaxX;
+	
+	struct CFocusRect
+	{
+		RECT	m_rcOrig;
+		RECT	m_rcFocus;
+	};
+	CUtlVector < CFocusRect >	m_FocusRects;
+
+	CUtlVector< CExpressionSample > m_CopyData[2];
+
+	CExpressionToolWorkspace *m_pWorkspace;
+
+	CChoreoEvent				*m_pLastEvent;
+
+	int					m_nMousePos[ 2 ];
+
+	float				m_flSelection[ 2 ];
+	bool				m_bSelectionActive;
+
+	bool				m_bSuppressLayout;
+	// Height/width of scroll bars
+	int					m_nScrollbarHeight;
+	float				m_flLeftOffset;
+	mxScrollbar			*m_pHorzScrollBar;
+	int					m_nLastHPixelsNeeded;
+	// How many pixels per second we are showing in the UI
+	float				m_flPixelsPerSecond;
+	// Do we need to move controls?
+	bool				m_bLayoutIsValid;
+	float				m_flLastDuration;
+	bool				m_bInSetEvent;
+	float				m_flScrubberTimeOffset;
+
+	friend class		CChoreoView;
+
+
+};
+
+extern ExpressionTool	*g_pExpressionTool;
+
+#endif // EXPRESSIONTOOL_H