dragcol.cpp

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// $Id: dragcol.cpp 1282 2006-06-09 09:46:49Z alex $
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----------------------------------

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 */
// DragCol.cpp - Colour DragInformation base class

/*
*/


#include "camtypes.h"

//#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "ccolbar.h"
#include "coldlog.h"
#include "colourix.h"
#include "colormgr.h"
#include "devcolor.h"
//#include "docview.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "dragcol.h"
#include "dragmgr.h"
#include "keypress.h"
#include "camframe.h"
//#include "resource.h"
#include "sgcolour.h"
#include "camview.h"
//#include "attrmgr.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "fillattr.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "ink.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "lineattr.h"

#include "palman.h"

#include "backgrnd.h"   // OpBackground
#include "keypress.h"   // KeyPress
//#include "galstr.h"       // _R(IDS_DRAGCOL_DROP_SETPAGEBACKGROUND)

CC_IMPLEMENT_DYNCREATE(ColourDragInformation, DragInformation)



const INT32 CellSize = 16;      // X/Y size of the solid-dragged colour square



// Default to non-transparent dragging
INT32 ColourDragInformation::DragTransparency = 0;



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

>   void ColourDragInformation::InitObject(void)
     
    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    9/8/96

    Purpose:    Shared code for initialising the object - called by all constructors

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

void ColourDragInformation::InitObject(void)
{
    // Init member variables
    TheColour = DocColour(COLOUR_TRANS);
    pParentDoc = NULL;
    ColourName = TEXT("");
    LibColIsSpot = FALSE;

    // Set up a few things about this drag
    DoesSolidDrag = TRUE;
    
    // offset of colour swatch from the pointer
    SolidDragOffset.x = -14;
    SolidDragOffset.y = 4;     
    
    // size of the solid drag redraw
    SolidDragSize.x = CellSize;
    SolidDragSize.y = CellSize;
}



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

>   void ColourDragInformation::ColourDragInformation() 
     
    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/1/95       

    Purpose:    Conmstructor - do not call this default constructor.

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

ColourDragInformation::ColourDragInformation()
{
    ERROR3("Default ColourDragInformation constructor called"); 
    InitObject();
}



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

>   void ColourDragInformation::ColourDragInformation(IndexedColour *Colour, BOOL IsAdjust,
                                                        Document* pParent) 
     
    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/1/95       
    
    Inputs:     Colour      - The IndexedColour being dragged
                              May not be NULL

                IsAdjust    - TRUE if this is an adjust-drag, FALSE if a select-drag

                pParent     - Points to the parent document for the dragged colour.

    Purpose:    Constructor
                Use this for "docuemnt colours" i.e. IndexedColours which already exist
                inside a document. See the other constructor for library colours

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

ColourDragInformation::ColourDragInformation(IndexedColour *Colour,BOOL IsAdjust,
                                                Document* pParent)
                        : DragInformation(IsAdjust)
{
    ERROR3IF(pParent == NULL, "Illegal NULL param");

    InitObject();

    // The IndexedColour we are dragging - if it's NULL, we're dragging "no colour"
    if (Colour != NULL)
        TheColour.MakeRefToIndexedColour(Colour);

    // The Parent document of the colour we are dragging
    pParentDoc = pParent;
}



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

>   ColourDragInformation::ColourDragInformation(DocColour *Colour, BOOL IsAdjust,
                                                    StringBase *pColourName, BOOL IsSpot)
     
    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/1/95       
    
    Inputs:     Colour      - The Colour being dragged
                              May not be NULL

                IsAdjust    - TRUE if this is an adjust-drag, FALSE if a select-drag

                pColourName - Should not be NULL (but it won't ERROR3, because
                                of GalleryColourDragInfo constructor technical reasons)
                                The name of the colour being dragged

                IsSpot      - TRUE if this library colour is a spot colour

    Purpose:    Constructor
                Use this for "library colours" i.e. Colours which DON'T already exist
                inside a document. See the other constructor for document colours.

                When the drag finishes, the user will ask this object for a colour,
                at which point, an IndexedColour will be created for them from the
                given DocColour and Name string. See GetLibraryColourForDocument()

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

ColourDragInformation::ColourDragInformation(DocColour *Colour, BOOL IsAdjust,
                                                StringBase *pColourName, BOOL IsSpot)
                        : DragInformation(IsAdjust)
{
    ERROR3IF(Colour == NULL, "Illegal NULL param");

    InitObject();

    TheColour = *Colour;
    LibColIsSpot = IsSpot;
    
    if (pColourName != NULL)
        ColourName = *pColourName;
}



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

>   static BOOL ColourDragInformation::Init()

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/3/95       
    Returns:    -
    Purpose:    Initialise any Colour Drag stuff. (eg. ini file preferences).
    SeeAlso:    -

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

BOOL ColourDragInformation::Init()
{
    // Setup preference for drag transparency
    if (GetApplication()->DeclareSection(_T("Dragging"), 1))
        GetApplication()->DeclarePref( NULL, _T("ColourDragTransparency"), &DragTransparency, 0, 100);

    return TRUE;
}



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

>   BOOL ColourDragInformation::IsLibraryColour(void)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    9/8/96

    Returns:    TRUE if this is a "library colour" (has no parent document), or
                FALSE if the dragged colour resides in a document

    Purpose:    To determine if the dragged colour is from a library or a document

    SeeAlso:    ColourDragInformation::GetParentDoc

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

BOOL ColourDragInformation::IsLibraryColour(void)
{
    return(GetParentDoc() == NULL);
}



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

>   Document *ColourDragInformation::GetParentDoc(void)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    9/8/96

    Returns:    NULL (if this is a "library colour" (has no parent document)), or a pointer
                to the Source Document from which the colour has been dragged.

    Purpose:    To determine the document (if any) from which a colour is being dragged

    SeeAlso:    ColourDragInformation::IsLibraryColour

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

Document *ColourDragInformation::GetParentDoc(void)
{
    return(pParentDoc);
}



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

>   IndexedColour *ColourDragInformation::GetColourForDocument(Document *pDestDoc = NULL)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    9/8/96

    Inputs:     pDestDoc -  NULL, to copy the colour into the Selected document, or
                        a pointer to the document to copy the colour into

    Returns:    NULL if the colour is transparent (no colour), or
                A pointer to a safe colour to be used in the given document

    Purpose:    To copy/merge the dragged colour into the given document. The returned
                pointer is a colour which is contained in the given document, and
                can be safely used within that document.

    SeeAlso:    ColourDragInformation::IsLibraryColour

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

IndexedColour *ColourDragInformation::GetColourForDocument(Document *pDestDoc)
{
    // If no document supplied, assume the selected docuemnt is the destination
    if (pDestDoc == NULL)
        pDestDoc = Document::GetSelected();

    // If there is no destination document, or if the colour is transparent, return NULL
    if (pDestDoc == NULL || TheColour.IsTransparent())
        return(NULL);

    // If it's a document colour and already in the destination document, return it
    if (pParentDoc == pDestDoc)
        return(TheColour.FindParentIndexedColour());

    // Copy the dragged colour into a temporary DocColour
    DocColour Temp = TheColour;
    IndexedColour *TempIxCol = NULL;

    // Check if we've got an IndexedColour to use...
    if (Temp.FindParentIndexedColour() == NULL)
    {
        // It's a library colour, so we must create a new IndexedColour to use
        TempIxCol = new IndexedColour(Temp);
        if (TempIxCol == NULL)
            return(NULL);           // Failure - return "no colour"

        TempIxCol->SetName(ColourName);

        if (LibColIsSpot)           // If a spot colour, make it so
            TempIxCol->SetLinkedParent(TempIxCol->FindLastLinkedParent(), COLOURTYPE_SPOT);

        // And make the DocColour reference it
        Temp.MakeRefToIndexedColour(TempIxCol);
    }

    // Ensure the colour (or a safe equivalent) is in the dest doc, by copying/merging it
    ColourManager::EnsureColourIsInDocument(pParentDoc, pDestDoc, &Temp);

    // And delete any temporary IndexedColour we created
    if (TempIxCol != NULL)
        delete TempIxCol;

    // And finally, return the resulting colour
    return(Temp.FindParentIndexedColour());
}



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

>   virtual UINT32 ColourDragInformation::ApplyColourToSelection()

    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/1/95

    Purpose:    Applies the dragged colour to the current selection
                (including copying/merging the colour into the destination document
                if necessary)

    Notes:      Assumes that the selection will be in the Selected Document!
   
********************************************************************************************/

void ColourDragInformation::ApplyColourToSelection()
{
// WEBSTER-ranbirr-12/11/96 No colour bar stuff in webster
// Neville 23/5/97 Now has a Browser palette in the colour line
    IndexedColour *ColToUse = GetColourForDocument(NULL);

    // ColourToApply now references a safe colour to use, or NULL (in which case it is
    // used as 'no colour' by the colour bar, which is exactly what we wanted. Fabby)
    CColourBar::TheColourBar->ApplyColour(ColToUse, IsAdjustDrag);
}



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

>   void ColourDragInformation::GetCursorID(DragTarget* pDragTarget)

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/3/95
    Purpose:    Set cursor over this target


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

UINT32 ColourDragInformation::GetCursorID(DragTarget* pDragTarget)
{
    if (pDragTarget->IS_KIND_OF(ViewDragTarget))
    {
        PageDropInfo PageDropInfo;
        ((ViewDragTarget*)pDragTarget)->GetDropInfo(&PageDropInfo);

//      NodeRenderableInk* pObjectHit   = PageDropInfo.pObjectHit;
        ObjectDragTarget TargetHit      = PageDropInfo.TargetHit;

        ClickModifiers ClickMods = ClickModifiers::GetClickModifiers();
        BOOL IsInside = ClickMods.Constrain;

//      Removed by Will 23/1/96
//      This code was needed originally, but is no longer needed as the
//      colour drop testing code is much smarter and copes with the case
//      that this code is testing for.

//      if (!IsInside && pObjectHit && pObjectHit->IsCompound())
//      {
//          TargetHit = MANY_TARGET;
//      }

        switch (TargetHit)
        {
            case FILL_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILL) : _R(IDC_CANDROPONFILL);
            case LINE_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONLINE) : _R(IDC_CANDROPONLINE);
            case STARTCOL_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILLSTART) : _R(IDC_CANDROPONFILLSTART);
            case ENDCOL_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILLEND) : _R(IDC_CANDROPONFILLEND);
            case ENDCOL2_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILLEND2) : _R(IDC_CANDROPONFILLEND2);
            case ENDCOL3_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILLEND3) : _R(IDC_CANDROPONFILLEND3);
            case MANY_TARGET:
                return IsInside ? _R(IDC_DROPINSIDEONFILL) : _R(IDC_CANDROPONFILL);

            case NO_TARGET:
                // colour drag - drop = page fill, CTRL + drop = set current fill
                return IsInside ? _R(IDC_CANFILLPAGE) : _R(IDC_CANDROPONPAGE);
                //return _R(IDC_CANDROPONPAGE);
        };

        return _R(IDC_CANDROPONPAGE);
    }

    return 0;
}



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

>   virtual BOOL ColourDragInformation::GetStatusLineText(String_256 * TheText, DragTarget* pDragTarget)

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/3/95
    Returns:    Whether String is valid
    Purpose:    provide status line text for this target
   
********************************************************************************************/

BOOL ColourDragInformation::GetStatusLineText(String_256 * TheText, DragTarget* pDragTarget)
{
    ERROR2IF(TheText==NULL,FALSE,"NULL string in GetStatusLineText()");

    String_256 DragString(_R(IDS_DRAGCOL_DRAGGING_COLOUR)); // "Dragging colour '");

    if (TheColour.IsTransparent())
        DragString = _R(IDS_DRAGCOL_DRAGGING_NO_COLOUR);    // "Dragging 'no colour' : ";
    else
    {
        IndexedColour *TheIxCol = GetInitiallyDraggedColour();
        if (TheIxCol != NULL)
            DragString += *(TheIxCol->GetName());       // Document IndexedColour
        else
            DragString += ColourName;                   // Library colour

        DragString += String_16(_R(IDS_DRAGCOL_DRAGGING_COLOUR_RIGHT_BIT)); // "' : ";
    }

    if (pDragTarget->IS_KIND_OF(ViewDragTarget))
    {
        PageDropInfo PageDropInfo;
        ((ViewDragTarget*)pDragTarget)->GetDropInfo(&PageDropInfo);

        NodeRenderableInk* pObjectHit   = PageDropInfo.pObjectHit;
        ObjectDragTarget TargetHit      = PageDropInfo.TargetHit;

        String_256 ObjectDesc = _R(IDS_DRAGCOL_THIS_OBJECT); //" this object";

        if (pObjectHit)
        {
            ObjectDesc = pObjectHit->Describe(FALSE);
        }

        ClickModifiers ClickMods = ClickModifiers::GetClickModifiers();
        BOOL IsInside = ClickMods.Constrain;

        if (!IsInside && pObjectHit && pObjectHit->IsCompound())
        {
            TargetHit = MANY_TARGET;
        }

        switch (TargetHit)
        {
            case FILL_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL)); // "Drop to set the fill colour of this ";
                DragString += ObjectDesc;
                if (IsInside)
                    DragString += String_64(_R(IDS_DRAGCOL_ALONE)); // " alone";
                break;
            case LINE_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_LINE)); //"Drop to set the line colour of this ";
                DragString += ObjectDesc;
                if (IsInside)
                    DragString += String_64(_R(IDS_DRAGCOL_ALONE)); // " alone";
                break;
            case STARTCOL_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL_START)); //"Drop to set the fill start colour of this ";
                DragString += ObjectDesc;
                break;
            case ENDCOL_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL_END)); //"Drop to set the fill end colour of this ";
                DragString += ObjectDesc;
                break;
            case ENDCOL2_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL_END2)); //"Drop to set the fill end colour of this ";
                DragString += ObjectDesc;
                break;
            case ENDCOL3_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL_END3)); //"Drop to set the fill end colour of this ";
                DragString += ObjectDesc;
                break;
            case MANY_TARGET:
                DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_FILL)); //"Drop to set the fill colour of this ";
                DragString += ObjectDesc;
                DragString += String_64(_R(IDS_DRAGCOL_PRESS_CONTROL)); // "; Press 'Control' to drop 'Inside'";
                break;

            case NO_TARGET:
                if (IsInside)
                {
                    DragString += String_256(_R(IDS_DRAGCOL_DROP_SETPAGEBACKGROUND)); // "Drop to set the fill colour of the page background";
                }
                else
                {
                    DragString += String_64(_R(IDS_DRAGCOL_DROP_SET_CURRENT_FILL_COLOUR)); // "Drop to set the 'current fill colour' attribute";
                }
                break;
        };

        *TheText = DragString;
        return TRUE;
    }
    
    return FALSE;
}


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

>   virtual UINT32 ColourDragInformation::GetCursorID()

    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/1/95
    Returns:    a cursor ID to set during this drag
    Purpose:    Determines what cursor to display during a colour drag
   
********************************************************************************************/

UINT32 ColourDragInformation::GetCursorID()
{
    return(_R(IDC_DRAGGING_COLOUR));
}



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

>   virtual BOOL ColourDragInformation::GetStatusLineText(String_256 * TheText)

    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15/1/95

    Outputs:    TheText - If it returns TRUE, this is filled in with status line text
    Returns:    Whether String is valid

    Purpose:    provide status line text for this drag
   
********************************************************************************************/

BOOL ColourDragInformation::GetStatusLineText(String_256 *TheText)
{
    ERROR2IF(TheText==NULL,FALSE,"NULL string in GetStatusLineText()");
    String_32 LineString(_R(IDS_DRAGCOL_DRAGGING_LINE_COLOUR)); // "Dragging line colour : ");
    String_32 FillString(_R(IDS_DRAGCOL_DRAGGING_FILL_COLOUR)); // "Dragging fill colour : ");
    String_256 DragString;

    if(IsAdjustDrag)
        DragString = LineString;
    else
        DragString = FillString;

    if (TheColour.IsTransparent())
        DragString = _R(IDS_DRAGCOL_DRAGGING_NO_COLOUR);    //"Dragging 'no colour'";
    else
    {
        IndexedColour *TheIxCol = GetInitiallyDraggedColour();
        if (TheIxCol != NULL)
            DragString += *(TheIxCol->GetName());       // Document IndexedColour
        else
            DragString += ColourName;                   // Library colour
    }

    *TheText = DragString;

    return TRUE;
}



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

>   void ColourDragInformation::OnClick(INT32 Flags,POINT Point) 
     
    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/1/95       
    Inputs:     

    Purpose:    This is called if a drag was attempted but never started because it was a 
                click all along. In the base class, the default action is to make the
                colour bar think that the dragged colour has been clicked.

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

void ColourDragInformation::OnClick(INT32 Flags, CNativePoint Point)
{
//  WEBSTER-ranbirr-27/03/97 No colour bar stuff in webster
// Neville 23/5/97 Now has a Browser palette in the colour line

    if (KeyPress::IsAdjustPressed())
        Flags = -1;

    wxRect RectMouseIsIn;
    Point = CColourBar::TheColourBar->ScreenToClient(Point);
    UINT32 MousePos = CColourBar::TheColourBar->WhereIsMouse(Point, &RectMouseIsIn);

    CColourBar::TheColourBar->CellClicked(MousePos, (Flags < 0));
}



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

>   void ColourDragInformation::OnDrawSolidDrag(CRect DragRect,CDC * TheDC) 
     
    Author:     Chris_Snook (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/1/95       
    Inputs:     TheDC - pointer to a DC ready to draw into.
    Outputs:    -
    Returns:    -
    Purpose:    allows the drag to draw into a Device Context - DragManager will look after
                painting the background etc.
    Errors:     -
    SeeAlso:    -

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

BOOL ColourDragInformation::OnDrawSolidDrag(wxPoint Origin, wxDC *TheDC)
{
    // set up gbrush
//  CPalette * OldPal = NULL;
//  if (PaletteManager::UsePalette())
//  {
//      OldPal = PaletteManager::StartPaintPalette( TheDC );
//  }

    GBrush GDrawBrush;
    GDrawBrush.Init(TheDC);
    GDrawBrush.Start();

    // get a gbrush brush
    Document *ScopeDoc = Document::GetSelected();
    ERROR2IF(ScopeDoc == NULL, FALSE, "No Selected Doc !");

    wxBrush* pDragBrush = new wxBrush;
    
    BOOL BrushCreate = TRUE;

    if (pDragBrush != NULL )
    {
        if (TheColour.IsTransparent())
        {
//          TheDC->SetBkColor(RGB(255,255,255));        // ensure white background
            pDragBrush->SetStyle(wxCROSSDIAG_HATCH);
            pDragBrush->SetColour(wxColour(0,0,0));     // Fill with black/white cross hatch
        }
        else
        {
            DWORD ScreenWord;

            ColourContextRGBT *CCrgbt = (ColourContextRGBT *)
                        ColourManager::GetColourContext(COLOURMODEL_RGBT, DocView::GetSelected());
            ScreenWord = ConvertColourToScreenWord(CCrgbt, &TheColour);

            // create the Brush and Pen
            if (GDrawBrush.Available())
            {
                GDrawBrush.GetLogBrush((COLORREF)ScreenWord, pDragBrush);
            }
            else
                pDragBrush->SetColour((COLORREF)ScreenWord);
        }

        wxPen MyPen(wxColour(0,0,0));

        // Set the brush origin so the dither (or Hatch) patterns
        // don't move around as you drag.
//      TheDC->SetBrushOrg(Origin.x, Origin.y);
        
        //the rectangle to draw into
        wxRect DrawRect(Origin.x, Origin.y, SolidDragSize.x-1, SolidDragSize.y-1);

        // select brushes and pens ..
        TheDC->SetBrush(*pDragBrush);
        TheDC->SetPen(MyPen);

        // draw the thingy. In this case, it's a colour patch, circular for a spot colour, else a square
#ifndef WEBSTER // don't distinguish spots in Webster Martin 15/07/97
        if (!TheColour.IsTransparent() && TheColour.GetSpotParent() != NULL)
            TheDC->DrawEllipse(DrawRect);
        else
#endif // WEBSTER
            TheDC->DrawRectangle(DrawRect);
                                    
        // clean up the dc
        TheDC->SetBrush(wxNullBrush);
        TheDC->SetPen(wxNullPen);

        // delete the objects
        delete pDragBrush;
    }
    else
        BrushCreate = FALSE;
    
    // Finish with GBrush
    GDrawBrush.Stop();
//  if (OldPal)
//      PaletteManager::StopPaintPalette(TheDC, OldPal);
    
    // problems !!!
    ERROR2IF(!BrushCreate, FALSE, "Failed to make a solid drag brush!");

    return TRUE;
}



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

>   virtual INT32 ColourDragInformation::GetDragTransparency()
 
    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/3/95       
    Returns:    -
    Purpose:    Specifies how transparent a drag should be.
                A value of 0, will cause a normal solid blit.
                Any other value (between 0 and 100), will cause a masked blit.
    SeeAlso:    -

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

INT32 ColourDragInformation::GetDragTransparency()
{
    return ColourDragInformation::DragTransparency;
}



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

>   virtual BOOL ColourDragInformation::OnPageDrop(ViewDragTarget* pDragTarget)

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/3/95       
    Returns:    TRUE if it succeeds, FALSE if there is an error

    Purpose:    Called when a colour is dropped on an Object.

    Notes:      This routine assumes that the destination document is the SELECTED doc

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

BOOL ColourDragInformation::OnPageDrop(ViewDragTarget* pDragTarget)
{
    PageDropInfo ThePageDropInfo;
    ((ViewDragTarget*)pDragTarget)->GetDropInfo(&ThePageDropInfo);

    DocCoord DragPos            = ThePageDropInfo.DropPos;
    ObjectDragTarget TargetType = ThePageDropInfo.TargetHit;
    NodeRenderableInk* ThisNode = ThePageDropInfo.pObjectHit;

    // DMc 4/10/99
    // test for dragging & dropping onto a bevel/shadow/other compound node which
    // is grouped
    if (ThisNode)
    {
        if (ThisNode->FindParent())
        {
            if (!ThisNode->FindParent()->PromoteHitTestOnChildrenToMe())
            {
                // any compounds with their 'promotehittest' stuff set above me ?
                Node * pNode = ThisNode->FindParent();
                
                while (pNode)
                {
                    if (pNode->IsAnObject())
                    {
                        if (pNode->PromoteHitTestOnChildrenToMe())
                        {
                            ThisNode = (NodeRenderableInk *)pNode;
                        }
                    }
                    
                    pNode = pNode->FindParent();
                }
            }
        }
    }

    NodeAttribute *Attrib = NULL;
    
    // Get a colour to apply to the Selected doc
    IndexedColour *IxColToApply = GetColourForDocument(NULL);

    // And make a DocColour to apply
    DocColour ColourToApply(COLOUR_TRANS);
    if (IxColToApply != NULL)
        ColourToApply.MakeRefToIndexedColour(IxColToApply);


    if (TargetType == LINE_TARGET) // apply a stroke colour
    {
        // Apply a stroke colour to the object(s) we have been dropped onto
        Attrib = new AttrStrokeColourChange;
        if (Attrib == NULL)
            return FALSE;

        ((AttrStrokeColourChange *)Attrib)->SetStartColour(&ColourToApply);
        AttributeManager::ApplyAttribToNode(ThisNode, Attrib);
    }
    else          
    {
        // Apply a fill colour to the object(s) we have been dropped onto
        // This always used to be the case. If there were no objects then we
        // just set the current fill colour to be the new one.
        // Now, if no objects are the target then apply a page background colour
        // otherwise if control is held down set the current fill colour.
        
        BOOL Constrain = FALSE;

        // get object bounds
        DocRect pSimpleBounds;
        if (ThisNode)
            pSimpleBounds = ThisNode->GetBoundingRect();
        else
        {
            pSimpleBounds.MakeEmpty();
            // See if the control key is pressed
            Constrain = KeyPress::IsConstrainPressed();
        }

        // No node(s) are targetted so see if the constrain key is pressed or not
        if (ThisNode == NULL && Constrain)
        {
            // Use the colour to set the background
            // We should use the document given to us by the page info class
            OpBackgroundParam Param;
            Param.pDocColour = &ColourToApply;
            Param.pDoc = ThePageDropInfo.pDoc;          
            Param.pSpread = ThePageDropInfo.pSpread;
            
            // Obtain a pointer to the op descriptor for the create operation 
            OpDescriptor* pOpDesc = OpDescriptor::FindOpDescriptor(OPTOKEN_BACKGROUND);

            // Invoke the operation, passing in our parameters
            pOpDesc->Invoke(&Param);
        }
        else
        {
            // Apply the colour either to the targetted node(s) or as the current
            // fill colour, if no nodes are targetted.
            Attrib = new AttrColourDrop(DragPos, pSimpleBounds, ColourToApply);
            if (Attrib == NULL)
                return FALSE;

            if (ThisNode)
                ((AttrColourDrop*)Attrib)->SetObjectDroppedOn(ThisNode);

            AttributeManager::ApplyAttribToNode(ThisNode, Attrib);
        }
    }

    return TRUE;
}

---