// $Id: zoomops.h 1282 2006-06-09 09:46:49Z alex $
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 */
//
// Zoom tool Operations & OpDescriptors.

#ifndef ZOOMOPS_H
#define ZOOMOPS_H

#include "opdragbx.h"
//#include "bars.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "cursor.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "wrkcoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]


// These define tokens for each operation associated with "zooming".
#define OPTOKEN_ZOOMCOMBO 		TEXT("ZoomCombo")
#define OPTOKEN_ZOOMPREV		TEXT("ZoomPrev")
#define OPTOKEN_ZOOMSPREAD		TEXT("ZoomSpread")
#define OPTOKEN_ZOOMDRAWING 	TEXT("ZoomDrawing")
#define OPTOKEN_ZOOMSELECTED	TEXT("ZoomSelect")
#define OPTOKEN_ZOOMRECT		TEXT("ZoomRect")
#define OPTOKEN_ZOOMIN			TEXT("ZoomIn")
#define OPTOKEN_ZOOMOUT			TEXT("ZoomOut")

// Graeme (11/11/99) - Definition of the minimum size of the drag rectangle.
#define ZOOM_MIN_DRAG			5000

// Forward references.
class StringBase;
class String_256;
class DocView;
class Spread;
class WorkRect;
class DocCoord;
class DocRect;
class OpDescControlMsg;
class List;


// Preset zoom factors.
const INT32 cZoomTableSize       = 13;	// how many preset scale factors (percentages)
const INT32 cDefaultZoomIndex    = 8;		// the array index of the default scale, 100%

const INT32 cUninitZoomIndex 	   = -2;	// array index not set yet by zoom tool
const INT32 cFractionalZoomIndex = -1;	// scale lies between two zoom table entries

const INT32 cComboDivider1	   = cZoomTableSize;
const INT32 cFitToSpreadIndex	   = cZoomTableSize + 1;
const INT32 cFitToDrawingIndex   = cZoomTableSize + 2;
const INT32 cFitToSelectedIndex  = cZoomTableSize + 3;
const INT32 cPreviousZoomIndex   = cZoomTableSize + 4;
const INT32 cComboDivider2	   = cZoomTableSize + 5;



/********************************************************************************************
>	class OpZoom : public Operation

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	23/4/95
	Purpose:	This operation can perform zooms in and out of the current DocView, either
				by an immediate call to the ZoomIn/ZoomOut/ZoomInOnRect/ZoomAtPoint
				functions, or by a call to the DoDrag function, which starts a mouse drag
				to define a zoom box.
********************************************************************************************/

class OpZoom : public OpCentredDragBox
{
public:
	// Creation & destruction.
	OpZoom();

	// A do function (at INT32 last) so that menu and keyboard short cuts work.
	virtual	void Do(OpDescriptor*);

	// Nothing causes so much grief when changing the zoom code as the correct conversion
	// from spread coordinates to 64-bit view coordinates.  Here are some routines that
	// really work.
	static void SpreadToWork(Spread* pspdIn, const DocCoord& dcIn, WorkCoord* pwcOut);
	static void SpreadToWork(Spread* pspdIn, const DocRect& drIn, WorkRect* pwrOut);

	// These returns the given preset zoom factor as a percentage or a scale factor.
	static INT32 GetPresetZoomPercent(INT32 nPreset);
	static FIXED16 GetPresetZoomScale(INT32 nPreset);

	// This starts a drag (NB. hides the base-class OpDragState::DoDrag function).
	BOOL DoDrag(Spread* pStartSpread, const DocCoord& dcStartPos, ClickModifiers cmods);
	virtual BOOL SnappingDrag()				{ return FALSE; }

	// Zoom in or out by the next scale factor in the ZoomTable table.  These are normally
	// called on click events by the OpZoom user.
	void ZoomOut(const WorkCoord& wcZoom, BOOL fEndOp = TRUE);
	void ZoomOut(Spread* pZoomSpread, const DocCoord& dcZoomPos, BOOL fEndOp = TRUE);

	void ZoomIn(const WorkCoord& wcZoom, BOOL fEndOp = TRUE);
	void ZoomIn(Spread* pZoomSpread, const DocCoord& dcZoomPos, BOOL fEndOp = TRUE);

	// Zoom so that the given rectangle within the current view completely fills the
	// current view's view-port.
	void ZoomInOnRect(const WorkRect& wrZoom, BOOL fEndOp = TRUE);
	void ZoomInOnRect(Spread* pZoomSpread, const DocRect& dcZoomRect, BOOL fEndOp = TRUE);
		
	// Zoom in or out to show the given point in the current view at the given scale factor.
	void ZoomAtPoint(const WorkCoord& wcZoom, FIXED16 fxNewScaleFactor, BOOL fEndOp = TRUE);
	void ZoomAtPoint(Spread* pZoomSpread, const DocCoord& dcZoomPos, FIXED16 fxNewScaleFactor,
					 BOOL fEndOp = TRUE);

	// As ZoomAtPoint, but forces the auto-centre function off...
	void MouseWheelZoomAtPoint(const WorkCoord& wcZoom, FIXED16 fxNewScalePercent, BOOL fEndOp = TRUE);

	// This function registers all zoom operations/op-descriptors.
	static BOOL Declare();

private:
	// OpDragBox implementation.
	BOOL OnDragStarted(Spread*, const DocCoord&, ClickModifiers);
	BOOL OnPointerMoved(Spread*, const DocRect&, ClickModifiers);
	BOOL OnDragEnded(Spread* pBoxSpread, const DocRect& drDragBox,
					 ClickModifiers cmods, BOOL fDragOK);

	// Optionally calls OpDragBox::CalcDragBox or OpCentredDragBox::CalcDragBox,
	// depending on the preferences.
	DocRect CalcDragBox(const DocCoord& dcStartPos, const DocCoord& dcMousePos) const;

	// Called when the status line text needs refreshing.
	BOOL GetStatusLineText(String_256* ptext, Spread*, DocCoord, ClickModifiers);

	// Data members.
	Cursor    m_csrZoomIn; 							// the zoom in, zoom out and zoom drag
	Cursor    m_csrZoomOut;							// cursors.
	Cursor    m_csrZoomDrag;
	INT32   	  m_ncsrSaveDrag;						// saved old cursor ID when dragging
	WorkCoord m_wcStartPos;							// where the drag started, in workspace
	BOOL	  m_fStatusTextShown;					// flag to remind us to update text

	// Preset zoom factor percentages.
	static INT32 ZoomTable[cZoomTableSize];			

	// Preferences.
	static BOOL m_fRadialZoomDragBox;				// do drag from centre to corner
	static BOOL	m_fFixZoomClickPoint;				// fix on-screen the clicked point?
	static UINT32 m_nfShowZoomCursors;				// whether to flash cursor on zooming

	// Run-time typing.
	CC_DECLARE_DYNCREATE(OpZoom);
};

/********************************************************************************************
>	class OpZoomIn : public OpZoom

	Author:		Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
	Created:	19/11/00
	Purpose:	This op has been written so that we can use the NumPad Plus key to fire off
				a zoom in operation. We can`t use the zoom op directly as the hotkey code
				calls the Do() function instead of the DoWithParam(). What this class does
				is basically call the ZoomOps DoWithParam() from it`s Do() function.
********************************************************************************************/
class OpZoomIn : public OpZoom
{
public:
	// Creation & destruction.
	OpZoomIn();

	// A do function (at INT32 last) so that menu and keyboard short cuts work.
	virtual	void Do(OpDescriptor*);
	static BOOL Init();
	static OpState GetState(String_256* Description, OpDescriptor*);

private:
	// Run-time typing.
	CC_DECLARE_DYNCREATE(OpZoomIn);
};

/********************************************************************************************
>	class OpZoomOut : public OpZoom

	Author:		Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
	Created:	19/11/00
	Purpose:	This op has been written so that we can use the NumPad Minus key to fire off
				a zoom out operation. We can`t use the zoom op directly as the hotkey code
				calls the Do() function instead of the DoWithParam(). What this class does
				is basically call the ZoomOps DoWithParam() from it`s Do() function.
********************************************************************************************/
class OpZoomOut : public OpZoom
{
public:
	// Creation & destruction.
	OpZoomOut();

	// A do function (at INT32 last) so that menu and keyboard short cuts work.
	virtual	void Do(OpDescriptor*);
	static BOOL Init();
	static OpState GetState(String_256* Description, OpDescriptor*);

private:
	// Run-time typing.
	CC_DECLARE_DYNCREATE(OpZoomOut);
};

/********************************************************************************************
>	class OpZoomDescriptor : public OpDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	Base class to the two zoom tool OpDescriptors, OpZoomComboDescriptor
				and OpZoomButtonDescriptor.  Simplifies the parameters required by a
				constructor call, and provides default GetState and message handlers.
********************************************************************************************/

class OpZoomDescriptor : public OpDescriptor
{
public:
	OpZoomDescriptor(const TCHAR* pcszToken, UINT32 wStatusID, UINT32 wHelpID, UINT32 wBubbleID, UINT32 resourceID=0, UINT32 controlID=0);
	virtual MsgResult Message(Msg* pMsg);
	virtual BOOL IsAvailable();

	static void FakeInvoke(TCHAR* pszToken);
	static void FakeZoomToRect(const DocRect& rect);

	virtual BOOL DoZoom(OpZoom * pZoomOp);

protected:
	virtual Spread* GetSpread(DocView* pDocView) const;
	virtual DocRect GetRect(Spread* pSpread);
	virtual void AdjustRect(DocRect* pRect) const;

	virtual MsgResult HandleButtonMsg(DialogOp* popdlgThis, CGadgetID gidThis);
	static OpState GetState(String_256* psName, OpDescriptor* popdCandidate);
};



/********************************************************************************************
>	class OpZoomFitSpreadDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor for the zoom tool's "Fit to spread" button.
********************************************************************************************/

class OpZoomFitSpreadDescriptor : public OpZoomDescriptor
{
public:
	OpZoomFitSpreadDescriptor();

protected:
	virtual DocRect GetRect(Spread* pSpread);
	virtual void AdjustRect(DocRect* pRect) const;

private:
	BOOL m_DontScale;
};



/********************************************************************************************
>	class OpZoomFitDrawingDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor for the zoom tool's "Fit to drawing" button.
********************************************************************************************/

class OpZoomFitDrawingDescriptor : public OpZoomDescriptor
{
public:
	OpZoomFitDrawingDescriptor();

protected:
	virtual DocRect GetRect(Spread* pSpread);
};



/********************************************************************************************
>	class OpZoomFitSelectedDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor for the zoom tool's "Fit to selected" button.
********************************************************************************************/

class OpZoomFitSelectedDescriptor : public OpZoomDescriptor
{
public:
	OpZoomFitSelectedDescriptor();

protected:
	virtual Spread* GetSpread(DocView* pDocView) const;
	virtual DocRect GetRect(Spread* pSpread);
	virtual void AdjustRect(DocRect* pRect) const;
};


/********************************************************************************************
>	class OpZoomFitRectDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor used to zoom to a specific rectangle.
********************************************************************************************/

class OpZoomFitRectDescriptor : public OpZoomDescriptor
{
public:
	OpZoomFitRectDescriptor();
	void SetZoomRect(const DocRect& rect);

protected:
	virtual DocRect GetRect(Spread* pSpread);

private:
	DocRect TheRect;
};


/********************************************************************************************
>	class OpZoomPrevZoomDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor for the zoom tool's "Previous Zoom" button.
********************************************************************************************/

class OpZoomPrevZoomDescriptor : public OpZoomDescriptor
{
public:
	OpZoomPrevZoomDescriptor();
	
	static void SaveZoom(DocView* pDocView);

	virtual BOOL DoZoom(OpZoom * pZoomOp);

private:
	virtual BOOL IsAvailable();
	virtual MsgResult HandleButtonMsg(DialogOp* popdlgThis, CGadgetID gidThis);
};



/********************************************************************************************
>	class OpZoomComboDescriptor : public OpZoomDescriptor

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	13/5/93
	Purpose:	OpDescriptor for the zoom tool's combo-box containing scale factors.
********************************************************************************************/

class OpZoomComboDescriptor : public OpZoomDescriptor
{
public:
	OpZoomComboDescriptor();
	
	virtual MsgResult Message(Msg* pMsg);
	static BOOL Update(BOOL fRefreshList = FALSE);

private:
	MsgResult HandleCreateMsg(DialogOp* popdlgThis, CGadgetID gidThis);
	MsgResult HandleViewChangeMsg(DocView* pSelectedDocView);
	void OnSelectionChange(OpDescControlMsg* pCtrlMsg, List* pGadgetList);
	
	BOOL RefreshList();
	BOOL UpdateAllCombos(String_256* pStr);
	BOOL UpdateComboWithViewScale(DocView* pDocView);

	virtual BOOL IsAvailable();
	static BOOL StringToLong(const StringBase& pszIn, INT32* pnOut);
};



/********************************************************************************************
>	class ZoomInfoBarOp : public InformationBarOp

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	15/3/95
	Purpose:	Handles creation/destruction and message handling for the zoom tool
				info-bar.
	SeeAlso:	-
********************************************************************************************/

class ZoomInfoBarOp : public InformationBarOp
{
	CC_DECLARE_DYNCREATE(ZoomInfoBarOp);

public:
	ZoomInfoBarOp(ResourceID r=_R(IDD_ZOOMINFO)) {DlgResID=r;}
	MsgResult Message(Msg* pMsg);

};
	

/********************************************************************************************
>	class ZoomInfoBarOpCreate : public BarCreate

	Author:		Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
	Created:	19/5/94
	Purpose:	Class for creating (dummy) InformationBarOps.
				Derived classes of BarCreate are used by DialogBarOp::ReadBarsFromFile()
********************************************************************************************/

class ZoomInfoBarOpCreate : public BarCreate
{
public:
	DialogBarOp* Create();
};

#endif	// !ZOOMOPS_H
