opshear.h

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// $Id: opshear.h 751 2006-03-31 15:43:49Z alex $
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 */
// The transform operation that can be used to Shear the selection

#ifndef INC_OPSHEAR
#define INC_OPSHEAR

#include "transop.h"

#define OPTOKEN_SHEAR _T("Shear Transform")


/********************************************************************************************

>   class OpShearTrans : public TransOperation

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    18/7/94
    Purpose:    The operation that performs the interactive EORed dragging during a shear

********************************************************************************************/

class OpShearTrans : public TransOperation
{

CC_DECLARE_DYNCREATE(OpShearTrans);

public:
    // Construction/Destruction
    OpShearTrans();

    // These functions required for the OpDescriptor class
    static BOOL Declare();

private:
    // function to build the appropriate transform matrix
    virtual void InitTransformImmediate(OpParam* pParam);
    virtual void InitTransformOnDrag(DocCoord, ClickModifiers);
    virtual void UpdateTransformOnDrag(DocCoord, Spread*, ClickModifiers& ClickMods);
    virtual void BuildMatrix();
    virtual void SetStartBlob(INT32 StartBlob);
    virtual void ConstrainDrag(DocCoord*);

private:
    // Gather information about the size of the selection
    INT32 SelWidth;
    INT32 SelHeight;

    // Is this a horizontal Shear or a vertical one
    BOOL IsHorizontal;

    // Is this a Shear below/left of the origin?
    BOOL IsNegative;

    // The amount to shear by
    FIXED16 ShearBy;

    // The most recent mouse position
    DocCoord LastPos;
};


#endif      // INC_OPSHEAR

---