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public/matsys_controls/manipulator.h

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+//====== Copyright <20> 1996-2004, Valve Corporation, All rights reserved. =======
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef MANIPULATOR_H
+#define MANIPULATOR_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "vgui_controls/Panel.h"
+#include "mathlib/vector.h"
+
+//-----------------------------------------------------------------------------
+// Manipulator interface
+//-----------------------------------------------------------------------------
+class IManipulator
+{
+public:
+	virtual void OnBeginManipulation( void ) = 0;
+	virtual void OnAcceptManipulation( void ) = 0;
+	virtual void OnCancelManipulation( void ) = 0;
+
+	virtual void OnTick( void ) = 0;
+
+	virtual void OnCursorMoved( int x, int y ) = 0;
+	virtual void OnMousePressed( vgui::MouseCode code, int x, int y ) = 0;
+	virtual void OnMouseReleased( vgui::MouseCode code, int x, int y ) = 0;
+	virtual void OnMouseWheeled( int delta ) = 0;
+
+	virtual void SetViewportSize( int w, int h ) = 0;
+};
+
+
+//-----------------------------------------------------------------------------
+// Base class helper for implementing manipulators
+//-----------------------------------------------------------------------------
+class CBaseManipulator : public IManipulator
+{
+public:
+	CBaseManipulator()
+	{
+		m_nViewport[ 0 ] = m_nViewport[ 1 ]  = 0;
+	}
+
+	virtual void OnTick( void ) {};
+
+	virtual void OnBeginManipulation( void ) {}
+	virtual void OnAcceptManipulation( void ) {};
+	virtual void OnCancelManipulation( void ) {};
+
+	virtual void OnCursorMoved( int x, int y ) {};
+	virtual void OnMousePressed( vgui::MouseCode code, int x, int y ) {};
+	virtual void OnMouseReleased( vgui::MouseCode code, int x, int y ) {};
+	virtual void OnMouseWheeled( int delta ) {};
+
+	virtual void SetViewportSize( int w, int h )
+	{
+		m_nViewport[ 0 ] = w;
+        m_nViewport[ 1 ] = h;
+	}
+
+protected:
+	int			m_nViewport[ 2 ];
+};
+
+
+//-----------------------------------------------------------------------------
+// Base class for manipulators which operate on transforms
+//-----------------------------------------------------------------------------
+class CTransformManipulator : public CBaseManipulator
+{
+public:
+	CTransformManipulator( matrix3x4_t *pTransform );
+
+	void SetTransform( matrix3x4_t *transform );
+	matrix3x4_t *GetTransform();
+
+protected:
+	matrix3x4_t *m_pTransform;
+};
+
+
+//-----------------------------------------------------------------------------
+// Standard maya-like transform manipulator
+//-----------------------------------------------------------------------------
+class CPotteryWheelManip : public CTransformManipulator
+{
+public:
+	CPotteryWheelManip( matrix3x4_t *pTransform );
+
+	virtual void OnBeginManipulation( void );
+	virtual void OnAcceptManipulation( void );
+	virtual void OnCancelManipulation( void );
+
+	virtual void OnTick( void );
+
+	virtual void OnCursorMoved( int x, int y );
+	virtual void OnMousePressed( vgui::MouseCode code, int x, int y );
+	virtual void OnMouseReleased( vgui::MouseCode code, int x, int y );
+	virtual void OnMouseWheeled( int delta );
+
+	// Sets the zoom level
+	void SetZoom( float flZoom );
+
+protected:
+	int m_lastx, m_lasty;
+
+	float m_zoom;
+	float m_altitude, m_azimuth;
+	//vec3 m_lookat
+
+	float m_prevZoom;
+	float m_prevAltitude, m_prevAzimuth;
+
+	float m_flLastMouseTime;
+	float m_flLastTickTime;
+	float m_flSpin;
+	bool m_bSpin;
+
+	void UpdateTransform( void );
+	void UpdateZoom( float delta );
+};
+
+
+#endif // MANIPULATOR_H