bitmapgriddropdown.cpp

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// $Id: coldrop.cpp 1052 2006-05-15 14:19:14Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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Xara LX is free software; you can redistribute it and/or modify it
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-----------------

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 */

// coldrop.cpp - Colour drop-down list support

/*
*/


//-----------------------------------------------------------------------------------------
// Include files

#include "camtypes.h"
#include "camelot.h"
#include "errors.h"
#include "palman.h"
#include "cartprov.h"
#include "bitmapgriddropdown.h"
#include "dragbmp.h"
//#include <wx/dcmemory.h>
#include "grndbmp.h"
#include "colcontx.h"

#include "sgline.h"
#include "ccdc.h"
#include "dlgview.h"
#include "grnddib.h"
#include "ppbrush.h"
#include "qualattr.h"




//-----------------------------------------------------------------------------------------
// This must be defined AFTER all CC_IMPLEMENT_DYNCREATE calls
#define new CAM_DEBUG_NEW


CBGDDItemInfo::CBGDDItemInfo(String_256 strLabel)
{
    m_strLabel = strLabel;
}


CBGDDItemInfo::~CBGDDItemInfo()
{
}



/******************************************************************************
Function  : CBGDDItemInfo::GetLabel
Author    : Mikhail Tatarnikov
Purpose   : Gets the text assocciated with the item.
Returns   : String_256 - the item label.
Exceptions: 
Parameters: None
Notes     : 
******************************************************************************/
String_256 CBGDDItemInfo::GetLabel()
{
    return m_strLabel;
}




CBGDDWxBitmapItem::CBGDDWxBitmapItem(wxBitmap* pBitmap, BOOL bAutodelete,
                                     String_256 strLabel,
                                     BOOL bStretch)
    : CBGDDItemInfo(strLabel)
{
    m_pBitmap  = pBitmap;
    m_bDelete  = bAutodelete;
    m_bStretch = bStretch;
}

CBGDDWxBitmapItem::~CBGDDWxBitmapItem()
{
    if (m_bDelete)
        delete m_pBitmap;
}


/******************************************************************************
Function  : CBGDDWxBitmapItem::DrawItem
Author    : Mikhail Tatarnikov
Purpose   : Draws this item into dc
Returns   : void
Exceptions: 
Parameters: [in] wxDC&         dc     - device context to draw to;
            [in] const wxRect& rect   - area occupied by the item;
            [in] INT32         iFlags - drawing parameters.
Notes     : 
******************************************************************************/
void CBGDDWxBitmapItem::DrawItem(wxDC& dc, const wxRect& rect, INT32 iFlags) const
{
    // If the item isn't enabled just don't draw it
    // TODO: grey out the current bitmap instead.
    if (iFlags & wxGridComboPopup::keDisabled)
        return;


    // Draw to the memory bitmap first (so we can be sure the borders
    // isn't eated by the scaling.
    wxMemoryDC dcMem;
    wxBitmap oMemBitmap(rect.width, rect.height);
    dcMem.SelectObject(oMemBitmap);


    static wxPen   penBackground(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));
    static wxBrush brBackground(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));

    // Erase with background (by default it's grey).
    dcMem.SetPen(penBackground);
    dcMem.SetBrush(brBackground);

    dcMem.DrawRectangle(0, 0, rect.width, rect.height);

    double dXScale = 1.0;
    double dYScale = 1.0;

    if (m_bStretch)
    {
        dXScale = (double)rect.width  / (double)m_pBitmap->GetWidth();
        dYScale = (double)rect.height / (double)m_pBitmap->GetHeight();
    }

    dcMem.SetUserScale(dXScale, dYScale);

    dcMem.DrawBitmap(*m_pBitmap, 0, 0, TRUE);


    dcMem.SetBrush(wxNullBrush);
    dcMem.SetPen(wxNullPen);
    dcMem.SelectObject(wxNullBitmap);
    
    // Now we can draw bitmap without scaling - it has been scaled while
    // drawing to the memory DC.
    dc.SetUserScale(1.0, 1.0);
    dc.DrawBitmap(oMemBitmap, rect.x, rect.y, false);
}


CBGDDResourceItem::CBGDDResourceItem(UINT32 uiBitmapResID, String_256 strLabel, BOOL bStretch)
    : CBGDDWxBitmapItem(NULL, FALSE, strLabel, bStretch)
{
    m_pBitmap = CamArtProvider::Get()->FindBitmap(uiBitmapResID, CAF_DEFAULT);
    m_bDelete = FALSE;
}

CBGDDResourceItem::~CBGDDResourceItem()
{
}



CBGDDCachedItem::CBGDDCachedItem(String_256 strLabel)
    : CBGDDItemInfo(strLabel)
{
}

CBGDDCachedItem::~CBGDDCachedItem()
{
    TDCacheCollection::const_iterator citCur;
    for (citCur = m_colCache.begin(); citCur != m_colCache.end(); ++citCur)
    {
        delete (*citCur)->second;
        delete *citCur;
    }
    
    m_colCache.clear();
}

/******************************************************************************
Function  : CBGDDCachedItem::DoesCacheItemSizeMatch
Author    : Mikhail Tatarnikov
Purpose   : Checks whether a cache item corresponds to the specific size
Returns   : BOOL -
Exceptions: 
Parameters: [in] const pair<wxSize, xBitmap*>* poItem - 
            [in] wxSize szBitmap - 
Notes     : 
******************************************************************************/
BOOL CBGDDCachedItem::DoesCacheItemSizeMatch(const pair<wxSize, wxBitmap*>* poItem, wxSize szBitmap)
{
    return poItem->first == szBitmap;
}


/******************************************************************************
Function  : CBGDDCachedItem::GetWxBitmap
Author    : Mikhail Tatarnikov
Purpose   : Retrieves a representation from the cache
Returns   : wxBitmap* - the representation with the required size.
Exceptions: 
Parameters: [in] wxSize szBitmap - cached image size to look for.
Notes     : Creates a new representation if it doesn't exist.
******************************************************************************/
wxBitmap* CBGDDCachedItem::GetWxBitmap(wxSize szBitmap) const
{
    // Try to locate the cache.
    TDCacheCollection::const_iterator citFound = find_if(m_colCache.begin(), m_colCache.end(),
        bind2nd(ptr_fun(DoesCacheItemSizeMatch), szBitmap));

    if (citFound != m_colCache.end())
        return (*citFound)->second;

    // No bitmap found in the cache. Ask the derivide class to render its content.
    wxBitmap* pBitmap = RenderItemToBitmap(szBitmap);

    // Now we have a resulting bitmap. We need to cache and return it.
    m_colCache.push_back(new pair<wxSize, wxBitmap*>(szBitmap, pBitmap));

    return pBitmap;
}

void CBGDDCachedItem::DrawItem(wxDC& dc, const wxRect& rcDraw, INT32 iFlags) const
{
    wxBitmap* pBitmap = GetWxBitmap(rcDraw.GetSize());

    // We don't need to scale or do anything since we already have a bitmap of the right size.
    dc.DrawBitmap(*pBitmap, rcDraw.x, rcDraw.y, FALSE);
}


/******************************************************************************
Function  : CBGDDCachedItem::RenderItemToBitmap
Author    : Mikhail Tatarnikov
Purpose   : Renders an item to bitmap.
Returns   : wxBitmap* - bitmap with the rendered item.
Exceptions: 
Parameters: [in] wxSize szBitmap - size of the required bitmap.
Notes     : The function prepares a GRenderRegion and asks the derived class to
            draw itself into it.
******************************************************************************/
wxBitmap* CBGDDCachedItem::RenderItemToBitmap(wxSize szBitmap) const
{
    wxMemoryDC dcMem;
    wxBitmap* pBitmap = new wxBitmap(szBitmap.x, szBitmap.y);
    dcMem.SelectObject(*pBitmap);


    INT32 iDPI = 96;

    // Since we don't have a view, we need a fake one.
    DialogView *pDialogView = new DialogView;
    pDialogView->Init();
    FIXED16 Scale(1);

    Matrix oMatrix(1, 0, 0, 1, 0, 0);

    // Convert the item area to millipoints
    DocRect drcDocClip;
    drcDocClip.lo.x = 0;
    drcDocClip.lo.y = 0;

    drcDocClip.hi.x = (szBitmap.x * 1000);
    drcDocClip.hi.y = (szBitmap.y * 1000);


    // Create a bitmap render region.
    GRenderBitmap* pRenderRegion = new GRenderBitmap(drcDocClip, oMatrix, Scale, 24, iDPI, FALSE, 0, NULL, TRUE);
    pRenderRegion->AttachDevice(pDialogView, &dcMem, NULL, false);
    
    // Prepare for the rendering.
    pRenderRegion->InitDevice();
    pRenderRegion->SaveContext();
    pRenderRegion->StartRender();


    // Ask the derived class to render itself into GRenderRegion.
    RenderItemToGRenderRegion(pRenderRegion, drcDocClip);

    // Finalize the rendering.
    pRenderRegion->StopRender();
    pRenderRegion->RestoreContext();

    // Extract bitmap from the render region. 
    KernelBitmap* pKernelBitmap = new KernelBitmap(pRenderRegion->ExtractBitmap(), FALSE);

    BitmapDragInformation oDragBitmap(pKernelBitmap, szBitmap.x, szBitmap.y, 0, 0);
    oDragBitmap.OnDrawSolidDrag(wxPoint(0, 0), &dcMem);

    // Free resourced and return the resulting bitmap.
    delete pKernelBitmap;
    delete pRenderRegion;
    delete pDialogView;

    dcMem.SelectObject(wxNullBitmap);

    return pBitmap;
}


/******************************************************************************
Function  : CBGDDCachedItem::RenderItemToGRenderRegion
Author    : Mikhail Tatarnikov
Purpose   : Renders the item into GRenderRegion.
Returns   : void
Exceptions: 
Parameters: [in] GRenderRegion* pRenderRegion - Render region to draw to;
            [in] DocRect        drcItem       - item size.
Notes     : The derived classes should override this function if they don't
            override RenderItemToBitmap.
******************************************************************************/
void CBGDDCachedItem::RenderItemToGRenderRegion(GRenderRegion* pRenderRegion, DocRect drcItem) const
{
    ASSERT(FALSE);  // The derived classes should override this method
                    // Or the parent RenderItemToBitmap method.
}






CBGDDKernelBitmapItem::CBGDDKernelBitmapItem(KernelBitmap* pKernelBitmap, BOOL bAutodelete,
                                             String_256 strLabel, BOOL bStretch)
    : CBGDDCachedItem(strLabel)
{
    m_pKernelBitmap       = pKernelBitmap;
    m_bDeleteKernelBitmap = bAutodelete;
    m_bStretch            = bStretch;
}

CBGDDKernelBitmapItem::~CBGDDKernelBitmapItem()
{
    if (m_bDeleteKernelBitmap)
        delete m_pKernelBitmap;
}



/******************************************************************************
Function  : CBGDDKernelBitmapItem::GetWxBitmap
Author    : Mikhail Tatarnikov
Purpose   : Gets the wxBitmap representation of the currently stored KernelBitmap
Returns   : wxBitmap* - the required version of the KernelBitmap.
Exceptions: 
Parameters: [in] wxSize szBitmap - the size of representation.
Notes     : Since the KernelBitmap stored in the item can be of considerable size,
            we have to speed up the drawing (and scaling). It's done by caching
            the bitmap representations.
******************************************************************************/
wxBitmap* CBGDDKernelBitmapItem::RenderItemToBitmap(wxSize szBitmap) const
{
    // NOTE: the maximum size of bitmap allowed by BitmapDragInformation is 180*??? pixels!!
    wxMemoryDC dcMem;
    wxBitmap* pBitmap = new wxBitmap(szBitmap.x, szBitmap.y);
    dcMem.SelectObject(*pBitmap);
    dcMem.SetUserScale(1.0, 1.0);

    wxSize szDragBitmap = szBitmap;
    if (!m_bStretch)
        szDragBitmap = wxSize(m_pKernelBitmap->GetWidth(), m_pKernelBitmap->GetHeight());

    BitmapDragInformation oDragBitmap(m_pKernelBitmap, szDragBitmap.x, szDragBitmap.y, 0, 0);
    oDragBitmap.OnDrawSolidDrag(wxPoint(0, 0), &dcMem);

    dcMem.SelectObject(wxNullBitmap);

    return pBitmap;
}








CBGDDStrokeItem::CBGDDStrokeItem(LineAttrItem* plaiStroke, BOOL bAutodelete, String_256 strLabel)
    : CBGDDCachedItem(strLabel)
{
    m_plaiStroke = plaiStroke;
    m_bDelete    = bAutodelete;
}

CBGDDStrokeItem::~CBGDDStrokeItem()
{
    if (m_bDelete)
        delete m_plaiStroke;
}


/******************************************************************************
Function  : CBGDDStrokeItem::RenderItemToGRenderRegion
Author    : Mikhail Tatarnikov
Purpose   : Renders the stroke into GRenderRegion.
Returns   : void
Exceptions: 
Parameters: [in] GRenderRegion* pRenderRegion - Render region to draw to;
            [in] DocRect        drcItem       - item size.
Notes     : 
******************************************************************************/
void CBGDDStrokeItem::RenderItemToGRenderRegion(GRenderRegion* pRenderRegion, DocRect drcItem) const
{
    // Render the stroke.
    m_plaiStroke->Render(pRenderRegion, drcItem, LineAttrItem::NO_LABEL);
}





CBGDDBrushItem::CBGDDBrushItem(AttrBrushType* pabtBrush, BOOL bAutodelete, String_256 strLabel)
    : CBGDDCachedItem(strLabel)
{
    m_pabtBrush  = pabtBrush;
    m_bDelete    = bAutodelete;
}

CBGDDBrushItem::~CBGDDBrushItem()
{
    if (m_bDelete)
        delete m_pabtBrush;
}


/******************************************************************************
Function  : CBGDDBrushItem::RenderItemToGRenderRegion
Author    : Mikhail Tatarnikov
Purpose   : Renders the brush into GRenderRegion.
Returns   : void
Exceptions: 
Parameters: [in] GRenderRegion* pRenderRegion - Render region to draw to;
            [in] DocRect        drcItem       - item size.
Notes     : 
******************************************************************************/
void CBGDDBrushItem::RenderItemToGRenderRegion(GRenderRegion* pRenderRegion, DocRect drcItem) const
{
    Path  pthBrush;

    pthBrush.Initialise(8);
    pthBrush.IsFilled  =  FALSE;
    pthBrush.IsStroked = TRUE;
    pthBrush.FindStartOfPath();

    // avoid overhead of allocation each time ....
    INT32 iWidth      = drcItem.Width();
    INT32 iHeight     = drcItem.Height();
    INT32 iBorderX    = (INT32)(0.025 * iWidth);
//  INT32 iBorderY    = (INT32)(0.025 * iHeight);
//  INT32 iHalfWidth  = iWidth  / 2;
    INT32 iHalfHeight = iHeight / 2;

    DocCoord dcrdStartPoint(iBorderX, iHalfHeight);
    DocCoord dcrdEndPoint(iWidth - iBorderX, iHalfHeight);

    pthBrush.InsertMoveTo(dcrdStartPoint);
    pthBrush.InsertLineTo(dcrdEndPoint);


    pRenderRegion->SetLineWidth(iHeight / 3);

    PathProcessorBrush* pPathProc = m_pabtBrush->GetPathProcessor();
    pPathProc->ScaleToValue(1);
    pRenderRegion->SetLineColour(COLOUR_BLACK);

    m_pabtBrush->Render(pRenderRegion);
    pRenderRegion->DrawPath (&pthBrush);
}






















CBitmapGridDropDown::CBitmapGridDropDown()
{
    m_poUnselectedItem  = NULL;
}



CBitmapGridDropDown::~CBitmapGridDropDown()
{
}


/******************************************************************************
Function  : CBitmapGridDropDown::AddItem
Author    : Mikhail Tatarnikov
Purpose   : Adds an item with an image from a resource
Returns   : void
Exceptions: 
Parameters: [in] UINT32     uiBitmapResID - resource id with the image;
            [in] String_256 strLabel      - label for the item.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::AddItem(UINT32 uiBitmapResID, String_256 strLabel, BOOL bStretch)
{
    CBGDDItemInfo* pData = new CBGDDResourceItem(uiBitmapResID, strLabel, bStretch);
    CGridDropDown::AddItem(pData);
}

/******************************************************************************
Function  : CBitmapGridDropDown::AddItem
Author    : Mikhail Tatarnikov
Purpose   : Adds an item with an image
Returns   : void
Exceptions: 
Parameters: [in] wxBitmap*  pBitmap  - the bitmap to be shown for the item;
            [in] String_256 strLabel - the item label.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::AddItem(wxBitmap* pBitmap, BOOL bDelete, String_256 strLabel, BOOL bStretch)
{
    CBGDDItemInfo* pData = new CBGDDWxBitmapItem(pBitmap, bDelete, strLabel, bStretch);
    CGridDropDown::AddItem(pData);
}

/******************************************************************************
Function  : CBitmapGridDropDown::AddItem
Author    : Mikhail Tatarnikov
Purpose   : Adds an item with a kernel bitmap
Returns   : void
Exceptions: 
Parameters: [in] KernelBitmap* pKernelBitmap - the bitmap to be shown for the item;
            [in] String_256    strLabel      - the item label.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::AddItem(KernelBitmap* pKernelBitmap, BOOL bDelete, String_256 strLabel, BOOL bStretch)
{
    CBGDDItemInfo* pData = new CBGDDKernelBitmapItem(pKernelBitmap, bDelete, strLabel, bStretch);
    CGridDropDown::AddItem(pData);
}


/******************************************************************************
Function  : CBitmapGridDropDown::AddItem
Author    : Mikhail Tatarnikov
Purpose   : Adds an item and display a stroke in it.
Returns   : void
Exceptions: 
Parameters: [in] LineAttrItem* plaiStroke - the stroke to display in the item;
            [in] String_256    strLabel   - the item label.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::AddItem(LineAttrItem* plaiStroke, BOOL bDelete, String_256 strLabel)
{
    CBGDDStrokeItem* pStrokeItem = new CBGDDStrokeItem(plaiStroke, bDelete, strLabel);
    CGridDropDown::AddItem(pStrokeItem);
}


/******************************************************************************
Function  : CBitmapGridDropDown::AddItem
Author    : Mikhail Tatarnikov
Purpose   : Adds an item and display a brush in it.
Returns   : void
Exceptions: 
Parameters: [in] AttrBrushType* pabtBrush - the brush to be previewed in the item;
            [in] String_256     strLabel  - the item label.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::AddItem(AttrBrushType* pabtBrush, BOOL bDelete, String_256 strLabel)
{
    CBGDDBrushItem* pBrushItem = new CBGDDBrushItem(pabtBrush, bDelete, strLabel);
    CGridDropDown::AddItem(pBrushItem);
}


/******************************************************************************
Function  : CBitmapGridDropDown::SetUnselectedItem
Author    : Mikhail Tatarnikov
Purpose   : Sets an image to be used as "unselected" item
Returns   : void
Exceptions: 
Parameters: [in] UINT32     uiBitmapResID - resource id with the image;
            [in] String_256 strLabel      - label for the item.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::SetUnselectedItem(UINT32 uiBitmapResID, String_256 strLabel)
{
    m_poUnselectedItem = new CBGDDResourceItem(uiBitmapResID, strLabel);
}


/******************************************************************************
Function  : CBitmapGridDropDown::SetUnselectedItem
Author    : Mikhail Tatarnikov
Purpose   : Sets an image to be used as "unselected" item
Returns   : void
Exceptions: 
Parameters: [in] wxBitmap*  pBitmap  - the bitmap to be shown for the "unselected" item;
            [in] String_256 strLabel - the item label.
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::SetUnselectedItem(wxBitmap* pBitmap, String_256 strLabel)
{
    m_poUnselectedItem = new CBGDDWxBitmapItem(pBitmap, TRUE, strLabel);
}


/******************************************************************************
Function  : CBitmapGridDropDown::DrawItemCore
Author    : Mikhail Tatarnikov
Purpose   : Draws the item core - the image itself
Returns   : void
Exceptions: 
Parameters: [in] wxDC&   dc     - the device context to draw to;
            [in] wxRect& rect   - the area of the item;
            [in] INT32   iItem  - item index;
            [in] INT32   iFlags - additional flags (selected, highlighted, ...)
Notes     : 
******************************************************************************/
void CBitmapGridDropDown::DrawItemCore(wxDC& dc, const wxRect& rect, INT32 iItem, INT32 iFlags)
{
    CBGDDItemInfo* pItemData = GetItemData(iItem);

    if (pItemData)
        pItemData->DrawItem(dc, rect, iFlags);
}


/******************************************************************************
Function  : CBitmapGridDropDown::GetItemData
Author    : Mikhail Tatarnikov
Purpose   : Gets the item data
Returns   : CBGDDItemInfo* - the user data associated with the item;
Exceptions: 
Parameters: [in] INT32 iItem - the item index;
Notes     : 
******************************************************************************/
CBGDDItemInfo* CBitmapGridDropDown::GetItemData(INT32 iItem)
{
    if (iItem == -1)
        return m_poUnselectedItem;

    return (CBGDDItemInfo*)CGridDropDown::GetItemData(iItem);
}

/******************************************************************************
Function  : CBitmapGridDropDown::SelectByLabel
Author    : Mikhail Tatarnikov
Purpose   : Selects the element by label.
Returns   : void
Exceptions: 
Parameters: [in] String_256 strLabel - the label of the existing item to select;
Notes     : If several items with the same label exist, the first one is to be selected.
            If no item's label match, the combobox is unselected.
******************************************************************************/
void CBitmapGridDropDown::SelectByLabel(String_256 strLabel)
{
    // Walk over all items, looking for the first exact match.
    INT32 iSelectedIndex = -1;
    INT32 iItemsNum = GetItemsNum();
    for (INT32 i = 0; i < iItemsNum; ++i)
    {
        CBGDDItemInfo* pData = GetItemData(i);
        
        if (pData->GetLabel() == strLabel)
        {
            iSelectedIndex = i;
            break;
        }
        
    }
    
    SetSelected(iSelectedIndex);
}





/******************************************************************************
Function  : CBitmapGridDropDown::PreviewStroke
Author    : Mikhail Tatarnikov
Purpose   : Preview a stroke into a bitmap
Returns   : KernelBitmap* - the stroke preview.
Exceptions: 
Parameters: [in] LineAttrItem* plaiStroke - stroke to render.
Notes     : 
******************************************************************************/
KernelBitmap* CBitmapGridDropDown::PreviewStroke(LineAttrItem* plaiStroke)
{
    wxMemoryDC dcMem;

    // Setup a memory DC to draw into a bitmap.
    wxSize szItem =  GetItemSize();
    wxBitmap* pBitmap = new wxBitmap(szItem.x, szItem.y);
    dcMem.SelectObject(*pBitmap);

    dcMem.SetTextForeground(wxColour(0, 0, 0));

    INT32 iDPI = 96;

    DialogView *pDialogView = new DialogView;
    pDialogView->Init();
    FIXED16 Scale(1);

    Matrix oMatrix(1, 0, 0, 1, 0, 0);




    DocRect rcDocClip;
    // Convert the item area to millipoints
    rcDocClip.lo.x = 0;
    rcDocClip.lo.y = 0;

    rcDocClip.hi.x = (szItem.x * 1000);
    rcDocClip.hi.y = (szItem.y * 1000);


    // Create a bitmap render region.
    GRenderBitmap* pRenderRegion = new GRenderBitmap(rcDocClip, oMatrix, Scale, 24, iDPI, FALSE, 0, NULL, TRUE);
    pRenderRegion->AttachDevice(pDialogView, &dcMem, NULL, false);

    // Prepare for the rendering.
    pRenderRegion->InitDevice();
    pRenderRegion->SaveContext();
    pRenderRegion->StartRender();

    // Render the stroke.
    plaiStroke->Render(pRenderRegion, rcDocClip, LineAttrItem::NO_LABEL);

    pRenderRegion->StopRender();
    pRenderRegion->RestoreContext();

    // WinBM Now needs to be setup with the newly created bitmap
    KernelBitmap* pKernelBitmap = new KernelBitmap(pRenderRegion->ExtractBitmapCopy(), TRUE);


    delete pRenderRegion;
    delete pDialogView;

    dcMem.SelectObject(wxNullBitmap);
    delete pBitmap;

    return pKernelBitmap;
}

---