opflip.cpp

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// $Id: opflip.cpp 751 2006-03-31 15:43:49Z alex $
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 */
// Flip Operation

/*
*/

#include "camtypes.h"
#include "opflip.h"
//#include "rik.h"

// This is not compulsory, but you may as well put it in so that the correct version
// of your file can be registered in the .exe
DECLARE_SOURCE("$Revision: 751 $");

// An implement to match the Declare in the .h file.
// If you have many classes, it is recommended to place them all together, here at the start of the file
CC_IMPLEMENT_DYNCREATE(OpFlipTrans, TransOperation)

// This will get Camelot to display the filename and linenumber of any memory allocations
// that are not released at program exit
#define new CAM_DEBUG_NEW




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

>   OpFlipTrans::OpFlipTrans()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/7/93
    Purpose:    Constructor. Does nothing but set a flag to a default value.

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

OpFlipTrans::OpFlipTrans(): TransOperation()
{
    // Default to horizontal
    IsHorizontal = TRUE;
}



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

>   void OpFlipTrans::SetStartBlob(INT32 StartBlob)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/7/94
    Inputs:     StartBlob  - the Number of the blob that the operation was initiated on,
                if applicabale. They are numbered as follows :-
                MonoOn
                1  2  3
                4     5
                6  7  8
                MonoOff
                All operations that were not started from one of the 8 blobs should use 0
    Purpose:    Allows the operations to know how it was started. This operation is
                interested in the horizontal / vertical nature of the transform

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

void OpFlipTrans::SetStartBlob(INT32 StartBlob)
{
    // Only blobs 2, 7, 4 and 5 are relavant. All others are a problem
    ENSURE( (StartBlob==2) || (StartBlob==4) || (StartBlob==5) || (StartBlob==7),
            "Flip started on a diagonal startblob. This should not be.");

    // blobs 2 and 7 are the Middle Top and Middle Bottom blobs
    // and would suggest horizontal shearing
    if ((StartBlob==2) || (StartBlob==7))
        IsHorizontal = TRUE;
    else
        IsHorizontal = FALSE;
}





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

>   void OpFlipTrans::InitTransformImmediate(OpParam* pOpParam)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/7/94
    Inputs:     pOpParam - The parameters that were passed into the operation
    Purpose:    Sets up the transform ready for an immediate translation. This is called from
                DoWithParam()
    SeeAlso:    TransOperation::DoWithParam()

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

void OpFlipTrans::InitTransformImmediate(OpParam* pOpParam)
{
    // Does nothing
}




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

>   void OpFlipTrans::BuildMatrix()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/7/94
    Purpose:    Builds the transform matrix required to Flip the selection

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

void OpFlipTrans::BuildMatrix()
{
    // Translate to the origin
    Transform = Matrix(-CentreOfTrans.x, -CentreOfTrans.y);

    // Flip the selection according to horizontal / vertical ness
    Matrix FlipIt;
    if (IsHorizontal)
        FlipIt = Matrix(FIXED16(-1), FIXED16(1));
    else
        FlipIt = Matrix(FIXED16(1), FIXED16(-1));

    // translate back again
    Matrix TransFromOrigin(CentreOfTrans.x, CentreOfTrans.y);

    // Combine the 3 of them into a single matrix
    Transform *= FlipIt;
    Transform *= TransFromOrigin;
}




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

>   BOOL OpFlipTrans::Declare()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/7/93
    Returns:    TRUE if all went OK, False otherwise
    Purpose:    Adds the operation to the list of all known operations

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

BOOL OpFlipTrans::Declare()
{
    return (RegisterOpDescriptor(0, _R(IDS_FLIPTRANS), CC_RUNTIME_CLASS(OpFlipTrans),
                                OPTOKEN_FLIP, TransOperation::GetState)); 
}

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