libreoffice/svx/source/engine3d/dragmt3d.cxx

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: dragmt3d.cxx,v $
 * $Revision: 1.12.18.2 $
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include <dragmt3d.hxx>
#include <tools/shl.hxx>
#include <svx/svdpagv.hxx>
#include <svx/dialmgr.hxx>
#include <svx/svddrgmt.hxx>
#include <svx/svdtrans.hxx>
#include <svx/obj3d.hxx>
#include <svx/polysc3d.hxx>
#include <svx/e3dundo.hxx>
#include <svx/dialogs.hrc>
#include <svx/sdr/overlay/overlaypolypolygon.hxx>
#include <svx/sdr/overlay/overlaymanager.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <svx/sdr/contact/viewcontactofe3dscene.hxx>
#include <drawinglayer/geometry/viewinformation3d.hxx>
#include <svx/e3dsceneupdater.hxx>

TYPEINIT1(E3dDragMethod, SdrDragMethod);

/*************************************************************************
|*
|* Konstruktor aller 3D-DragMethoden
|*
\************************************************************************/

E3dDragMethod::E3dDragMethod (
    SdrDragView &_rView,
    const SdrMarkList& rMark,
    E3dDragConstraint eConstr,
    BOOL bFull)
:   SdrDragMethod(_rView),
    meConstraint(eConstr),
    mbMoveFull(bFull),
    mbMovedAtAll(FALSE)
{
    // Fuer alle in der selektion befindlichen 3D-Objekte
    // eine Unit anlegen
    const long nCnt(rMark.GetMarkCount());
    static bool bDoInvalidate(false);

    for(long nObjs = 0;nObjs < nCnt;nObjs++)
    {
        E3dObject* pE3dObj = dynamic_cast< E3dObject* >(rMark.GetMark(nObjs)->GetMarkedSdrObj());

        if(pE3dObj)
        {
            // fill new interaction unit
            E3dDragMethodUnit aNewUnit;
            aNewUnit.mp3DObj = pE3dObj;

            // get transformations
            aNewUnit.maInitTransform = aNewUnit.maTransform = pE3dObj->GetTransform();

            if(pE3dObj->GetParentObj())
            {
                // get transform between object and world, normally scene transform
                aNewUnit.maInvDisplayTransform = aNewUnit.maDisplayTransform = pE3dObj->GetParentObj()->GetFullTransform();
                aNewUnit.maInvDisplayTransform.invert();
            }

            // SnapRects der beteiligten Objekte invalidieren, um eine
            // Neuberechnung beim Setzen der Marker zu erzwingen
            if(bDoInvalidate)
            {
                pE3dObj->SetRectsDirty();
            }

            if(!mbMoveFull)
            {
                // create wireframe visualisation for parent coordinate system
                aNewUnit.maWireframePoly.clear();
                aNewUnit.maWireframePoly = pE3dObj->CreateWireframe();
                aNewUnit.maWireframePoly.transform(aNewUnit.maTransform);
            }

            // FullBound ermitteln
            maFullBound.Union(pE3dObj->GetSnapRect());

            // Unit einfuegen
            maGrp.push_back(aNewUnit);
        }
    }
}

/*************************************************************************
|*
\************************************************************************/

void E3dDragMethod::TakeComment(XubString& /*rStr*/) const
{
}

/*************************************************************************
|*
|* Erstelle das Drahtgittermodel fuer alle Aktionen
|*
\************************************************************************/

FASTBOOL E3dDragMethod::Beg()
{
    if(E3DDRAG_CONSTR_Z == meConstraint)
    {
        const sal_uInt32 nCnt(maGrp.size());
        DragStat().Ref1() = maFullBound.Center();

        for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
        {
            E3dDragMethodUnit& rCandidate = maGrp[nOb];
            rCandidate.mnStartAngle = GetAngle(DragStat().GetStart() - DragStat().GetRef1());
            rCandidate.mnLastAngle = 0;
        }
    }
    else
    {
        maLastPos = DragStat().GetStart();
    }

    if(!mbMoveFull)
    {
        Show();
    }

    return TRUE;
}

/*************************************************************************
|*
|* Schluss
|*
\************************************************************************/

FASTBOOL E3dDragMethod::End(FASTBOOL /*bCopy*/)
{
    const sal_uInt32 nCnt(maGrp.size());

    if(!mbMoveFull)
    {
        // WireFrame ausblenden
        Hide();
    }

    // Alle Transformationen anwenden und UnDo's anlegen
    if(mbMovedAtAll)
    {
        rView.BegUndo(SVX_RESSTR(RID_SVX_3D_UNDO_ROTATE));
        sal_uInt32 nOb(0);

        for(nOb=0;nOb<nCnt;nOb++)
        {
            E3dDragMethodUnit& rCandidate = maGrp[nOb];
            E3DModifySceneSnapRectUpdater aUpdater(rCandidate.mp3DObj);
            rCandidate.mp3DObj->SetTransform(rCandidate.maTransform);
            rView.AddUndo(new E3dRotateUndoAction(rCandidate.mp3DObj->GetModel(),
                rCandidate.mp3DObj, rCandidate.maInitTransform,
                rCandidate.maTransform));
        }
        rView.EndUndo();
    }

    return TRUE;
}

/*************************************************************************
|*
|* Abbruch
|*
\************************************************************************/

void E3dDragMethod::Brk()
{
    if(mbMoveFull)
    {
        if(mbMovedAtAll)
        {
            const sal_uInt32 nCnt(maGrp.size());

            for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
            {
                // Transformation restaurieren
                E3dDragMethodUnit& rCandidate = maGrp[nOb];
                rCandidate.mp3DObj->SetTransform(rCandidate.maInitTransform);
            }
        }
    }
    else
    {
        // WireFrame ausblenden
        Hide();
    }
}

/*************************************************************************
|*
|* Gemeinsames Mov()
|*
\************************************************************************/

void E3dDragMethod::Mov(const Point& /*rPnt*/)
{
    mbMovedAtAll = true;
}

/*************************************************************************
|*
|* Zeichne das Drahtgittermodel
|*
\************************************************************************/

// for migration from XOR to overlay
void E3dDragMethod::CreateOverlayGeometry(::sdr::overlay::OverlayManager& rOverlayManager, ::sdr::overlay::OverlayObjectList& rOverlayList)
{
    const sal_uInt32 nCnt(maGrp.size());
    basegfx::B2DPolyPolygon aResult;

    for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
    {
        E3dDragMethodUnit& rCandidate = maGrp[nOb];
        SdrPageView* pPV = rView.GetSdrPageView();

        if(pPV && pPV->HasMarkedObjPageView())
        {
            const basegfx::B3DPolyPolygon aCandidate(rCandidate.maWireframePoly);
            const sal_uInt32 nPlyCnt(aCandidate.count());

            if(nPlyCnt)
            {
                const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(rCandidate.mp3DObj->GetScene()->GetViewContact());
                const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());
                const basegfx::B3DHomMatrix aWorldToView(aViewInfo3D.getDeviceToView() * aViewInfo3D.getProjection() * aViewInfo3D.getOrientation());
                const basegfx::B3DHomMatrix aTransform(aWorldToView * rCandidate.maDisplayTransform);

                // transform to relative scene coordinates
                basegfx::B2DPolyPolygon aPolyPolygon(basegfx::tools::createB2DPolyPolygonFromB3DPolyPolygon(aCandidate, aTransform));

                // transform to 2D view coordinates
                aPolyPolygon.transform(rVCScene.getObjectTransformation());

                aResult.append(aPolyPolygon);
            }
        }
    }

    if(aResult.count())
    {
        ::sdr::overlay::OverlayPolyPolygonStriped* pNew = new ::sdr::overlay::OverlayPolyPolygonStriped(aResult);
        rOverlayManager.add(*pNew);
        rOverlayList.append(*pNew);
    }
}

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

                                E3dDragRotate

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

TYPEINIT1(E3dDragRotate, E3dDragMethod);

E3dDragRotate::E3dDragRotate(SdrDragView &_rView,
    const SdrMarkList& rMark,
    E3dDragConstraint eConstr,
    BOOL bFull)
:   E3dDragMethod(_rView, rMark, eConstr, bFull)
{
    // Zentrum aller selektierten Objekte in Augkoordinaten holen
    const sal_uInt32 nCnt(maGrp.size());

    if(nCnt)
    {
        const E3dScene *pScene = maGrp[0].mp3DObj->GetScene();

        if(pScene)
        {
            const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pScene->GetViewContact());
            const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());

            for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
            {
                E3dDragMethodUnit& rCandidate = maGrp[nOb];
                basegfx::B3DPoint aObjCenter = rCandidate.mp3DObj->GetBoundVolume().getCenter();
                const basegfx::B3DHomMatrix aTransform(aViewInfo3D.getOrientation() * rCandidate.maDisplayTransform * rCandidate.maInitTransform);

                aObjCenter = aTransform * aObjCenter;
                maGlobalCenter += aObjCenter;
            }

            // Teilen durch Anzahl
            if(nCnt > 1)
            {
                maGlobalCenter /= (double)nCnt;
            }

            // get rotate center and transform to 3D eye coordinates
            basegfx::B2DPoint aRotCenter2D(Ref1().X(), Ref1().Y());

            // from world to relative scene using inverse getObjectTransformation()
            basegfx::B2DHomMatrix aInverseObjectTransform(rVCScene.getObjectTransformation());
            aInverseObjectTransform.invert();
            aRotCenter2D = aInverseObjectTransform * aRotCenter2D;

            // from 3D view to 3D eye
            basegfx::B3DPoint aRotCenter3D(aRotCenter2D.getX(), aRotCenter2D.getY(), 0.0);
            basegfx::B3DHomMatrix aInverseViewToEye(aViewInfo3D.getDeviceToView() * aViewInfo3D.getProjection());
            aInverseViewToEye.invert();
            aRotCenter3D = aInverseViewToEye * aRotCenter3D;

        // X,Y des RotCenter und Tiefe der gemeinsamen Objektmitte aus
        // Rotationspunkt im Raum benutzen
            maGlobalCenter.setX(aRotCenter3D.getX());
            maGlobalCenter.setY(aRotCenter3D.getY());
        }
    }
}

/*************************************************************************
|*
|* Das Objekt wird bewegt, bestimme die Winkel
|*
\************************************************************************/

void E3dDragRotate::Mov(const Point& rPnt)
{
    // call parent
    E3dDragMethod::Mov(rPnt);

    if(DragStat().CheckMinMoved(rPnt))
    {
        // Modifier holen
        sal_uInt16 nModifier = 0;
        if(rView.ISA(E3dView))
        {
            const MouseEvent& rLastMouse = ((E3dView&)rView).GetMouseEvent();
            nModifier = rLastMouse.GetModifier();
        }

        // Alle Objekte rotieren
        const sal_uInt32 nCnt(maGrp.size());

        for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
        {
            // Rotationswinkel bestimmen
            double fWAngle, fHAngle;
            E3dDragMethodUnit& rCandidate = maGrp[nOb];

            if(E3DDRAG_CONSTR_Z == meConstraint)
            {
                fWAngle = NormAngle360(GetAngle(rPnt - DragStat().GetRef1()) -
                    rCandidate.mnStartAngle) - rCandidate.mnLastAngle;
                rCandidate.mnLastAngle = (long)fWAngle + rCandidate.mnLastAngle;
                fWAngle /= 100.0;
                fHAngle = 0.0;
            }
            else
            {
                fWAngle = 90.0 * (double)(rPnt.X() - maLastPos.X())
                    / (double)maFullBound.GetWidth();
                fHAngle = 90.0 * (double)(rPnt.Y() - maLastPos.Y())
                    / (double)maFullBound.GetHeight();
            }
            long nSnap = 0;

            if(!rView.IsRotateAllowed(FALSE))
                nSnap = 90;

            if(nSnap != 0)
            {
                fWAngle = (double)(((long) fWAngle + nSnap/2) / nSnap * nSnap);
                fHAngle = (double)(((long) fHAngle + nSnap/2) / nSnap * nSnap);
            }

            // nach radiant
            fWAngle *= F_PI180;
            fHAngle *= F_PI180;

            // Transformation bestimmen
            basegfx::B3DHomMatrix aRotMat;
            if(E3DDRAG_CONSTR_Y & meConstraint)
            {
                if(nModifier & KEY_MOD2)
                    aRotMat.rotate(0.0, 0.0, fWAngle);
                else
                    aRotMat.rotate(0.0, fWAngle, 0.0);
            }
            else if(E3DDRAG_CONSTR_Z & meConstraint)
            {
                if(nModifier & KEY_MOD2)
                    aRotMat.rotate(0.0, fWAngle, 0.0);
                else
                    aRotMat.rotate(0.0, 0.0, fWAngle);
            }
            if(E3DDRAG_CONSTR_X & meConstraint)
            {
                aRotMat.rotate(fHAngle, 0.0, 0.0);
            }

            // Transformation in Eye-Koordinaten, dort rotieren
            // und zurueck
            const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(rCandidate.mp3DObj->GetScene()->GetViewContact());
            const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());
            basegfx::B3DHomMatrix aInverseOrientation(aViewInfo3D.getOrientation());
            aInverseOrientation.invert();

            basegfx::B3DHomMatrix aTransMat(rCandidate.maDisplayTransform);
            aTransMat *= aViewInfo3D.getOrientation();
            aTransMat.translate(-maGlobalCenter.getX(), -maGlobalCenter.getY(), -maGlobalCenter.getZ());
            aTransMat *= aRotMat;
            aTransMat.translate(maGlobalCenter.getX(), maGlobalCenter.getY(), maGlobalCenter.getZ());
            aTransMat *= aInverseOrientation;
            aTransMat *= rCandidate.maInvDisplayTransform;

            // ...und anwenden
            rCandidate.maTransform *= aTransMat;

            if(mbMoveFull)
            {
                rCandidate.mp3DObj->SetTransform(rCandidate.maTransform);
            }
            else
            {
                Hide();
                rCandidate.maWireframePoly.transform(aTransMat);
                Show();
            }
        }
        maLastPos = rPnt;
        DragStat().NextMove(rPnt);
    }
}

/*************************************************************************
|*
\************************************************************************/

Pointer E3dDragRotate::GetPointer() const
{
    return Pointer(POINTER_ROTATE);
}

/*************************************************************************
|*
|* E3dDragMove
|* Diese DragMethod wird nur bei Translationen innerhalb von 3D-Scenen
|* benoetigt. Wird eine 3D-Scene selbst verschoben, so wird diese DragMethod
|* nicht verwendet.
|*
\************************************************************************/

TYPEINIT1(E3dDragMove, E3dDragMethod);

E3dDragMove::E3dDragMove(SdrDragView &_rView,
    const SdrMarkList& rMark,
    SdrHdlKind eDrgHdl,
    E3dDragConstraint eConstr,
    BOOL bFull)
:   E3dDragMethod(_rView, rMark, eConstr, bFull),
    meWhatDragHdl(eDrgHdl)
{
    switch(meWhatDragHdl)
    {
        case HDL_LEFT:
            maScaleFixPos = maFullBound.RightCenter();
            break;
        case HDL_RIGHT:
            maScaleFixPos = maFullBound.LeftCenter();
            break;
        case HDL_UPPER:
            maScaleFixPos = maFullBound.BottomCenter();
            break;
        case HDL_LOWER:
            maScaleFixPos = maFullBound.TopCenter();
            break;
        case HDL_UPLFT:
            maScaleFixPos = maFullBound.BottomRight();
            break;
        case HDL_UPRGT:
            maScaleFixPos = maFullBound.BottomLeft();
            break;
        case HDL_LWLFT:
            maScaleFixPos = maFullBound.TopRight();
            break;
        case HDL_LWRGT:
            maScaleFixPos = maFullBound.TopLeft();
            break;
        default:
            // Bewegen des Objektes, HDL_MOVE
            break;
    }

    // Override wenn IsResizeAtCenter()
    if(rView.IsResizeAtCenter())
    {
        meWhatDragHdl = HDL_USER;
        maScaleFixPos = maFullBound.Center();
    }
}

/*************************************************************************
|*
|* Das Objekt wird bewegt, bestimme die Translation
|*
\************************************************************************/

void E3dDragMove::Mov(const Point& rPnt)
{
    // call parent
    E3dDragMethod::Mov(rPnt);

    if(DragStat().CheckMinMoved(rPnt))
    {
        if(HDL_MOVE == meWhatDragHdl)
        {
            // Translation
            // Bewegungsvektor bestimmen
            basegfx::B3DPoint aGlobalMoveHead((double)(rPnt.X() - maLastPos.X()), (double)(rPnt.Y() - maLastPos.Y()), 32768.0);
            basegfx::B3DPoint aGlobalMoveTail(0.0, 0.0, 32768.0);
            const sal_uInt32 nCnt(maGrp.size());

            // Modifier holen
            sal_uInt16 nModifier(0);

            if(rView.ISA(E3dView))
            {
                const MouseEvent& rLastMouse = ((E3dView&)rView).GetMouseEvent();
                nModifier = rLastMouse.GetModifier();
            }

            for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
            {
                E3dDragMethodUnit& rCandidate = maGrp[nOb];
                const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(rCandidate.mp3DObj->GetScene()->GetViewContact());
                const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());

                // move coor from 2d world to 3d Eye
                basegfx::B2DPoint aGlobalMoveHead2D((double)(rPnt.X() - maLastPos.X()), (double)(rPnt.Y() - maLastPos.Y()));
                basegfx::B2DPoint aGlobalMoveTail2D(0.0, 0.0);
                basegfx::B2DHomMatrix aInverseSceneTransform(rVCScene.getObjectTransformation());

                aInverseSceneTransform.invert();
                aGlobalMoveHead2D = aInverseSceneTransform * aGlobalMoveHead2D;
                aGlobalMoveTail2D = aInverseSceneTransform * aGlobalMoveTail2D;

                basegfx::B3DPoint aMoveHead3D(aGlobalMoveHead2D.getX(), aGlobalMoveHead2D.getY(), 0.5);
                basegfx::B3DPoint aMoveTail3D(aGlobalMoveTail2D.getX(), aGlobalMoveTail2D.getY(), 0.5);
                basegfx::B3DHomMatrix aInverseViewToEye(aViewInfo3D.getDeviceToView() * aViewInfo3D.getProjection());
                aInverseViewToEye.invert();

                aMoveHead3D = aInverseViewToEye * aMoveHead3D;
                aMoveTail3D = aInverseViewToEye * aMoveTail3D;

                // eventually switch movement from XY to XZ plane
                if(nModifier & KEY_MOD2)
                {
                    double fZwi = aMoveHead3D.getY();
                    aMoveHead3D.setY(aMoveHead3D.getZ());
                    aMoveHead3D.setZ(fZwi);

                    fZwi = aMoveTail3D.getY();
                    aMoveTail3D.setY(aMoveTail3D.getZ());
                    aMoveTail3D.setZ(fZwi);
                }

                // Bewegungsvektor von Aug-Koordinaten nach Parent-Koordinaten
                basegfx::B3DHomMatrix aInverseOrientation(aViewInfo3D.getOrientation());
                aInverseOrientation.invert();
                basegfx::B3DHomMatrix aCompleteTrans(rCandidate.maInvDisplayTransform * aInverseOrientation);

                aMoveHead3D = aCompleteTrans * aMoveHead3D;
                aMoveTail3D = aCompleteTrans* aMoveTail3D;

                // build transformation
                basegfx::B3DHomMatrix aTransMat;
                basegfx::B3DPoint aTranslate(aMoveHead3D - aMoveTail3D);
                aTransMat.translate(aTranslate.getX(), aTranslate.getY(), aTranslate.getZ());

                // ...and apply
                rCandidate.maTransform *= aTransMat;

                if(mbMoveFull)
                {
                    rCandidate.mp3DObj->SetTransform(rCandidate.maTransform);
                }
                else
                {
                    Hide();
                    rCandidate.maWireframePoly.transform(aTransMat);
                    Show();
                }
            }
        }
        else
        {
            // Skalierung
            // Skalierungsvektor bestimmen
            Point aStartPos = DragStat().GetStart();
            const sal_uInt32 nCnt(maGrp.size());

            for(sal_uInt32 nOb(0); nOb < nCnt; nOb++)
            {
                E3dDragMethodUnit& rCandidate = maGrp[nOb];
                const basegfx::B3DPoint aObjectCenter(rCandidate.mp3DObj->GetBoundVolume().getCenter());

                // transform from 2D world view to 3D eye
                const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(rCandidate.mp3DObj->GetScene()->GetViewContact());
                const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());

                basegfx::B2DPoint aGlobalScaleStart2D((double)(aStartPos.X()), (double)(aStartPos.Y()));
                basegfx::B2DPoint aGlobalScaleNext2D((double)(rPnt.X()), (double)(rPnt.Y()));
                basegfx::B2DPoint aGlobalScaleFixPos2D((double)(maScaleFixPos.X()), (double)(maScaleFixPos.Y()));
                basegfx::B2DHomMatrix aInverseSceneTransform(rVCScene.getObjectTransformation());

                aInverseSceneTransform.invert();
                aGlobalScaleStart2D = aInverseSceneTransform * aGlobalScaleStart2D;
                aGlobalScaleNext2D = aInverseSceneTransform * aGlobalScaleNext2D;
                aGlobalScaleFixPos2D = aInverseSceneTransform * aGlobalScaleFixPos2D;

                basegfx::B3DPoint aGlobalScaleStart3D(aGlobalScaleStart2D.getX(), aGlobalScaleStart2D.getY(), aObjectCenter.getZ());
                basegfx::B3DPoint aGlobalScaleNext3D(aGlobalScaleNext2D.getX(), aGlobalScaleNext2D.getY(), aObjectCenter.getZ());
                basegfx::B3DPoint aGlobalScaleFixPos3D(aGlobalScaleFixPos2D.getX(), aGlobalScaleFixPos2D.getY(), aObjectCenter.getZ());
                basegfx::B3DHomMatrix aInverseViewToEye(aViewInfo3D.getDeviceToView() * aViewInfo3D.getProjection());

                aInverseViewToEye.invert();
                basegfx::B3DPoint aScStart(aInverseViewToEye * aGlobalScaleStart3D);
                basegfx::B3DPoint aScNext(aInverseViewToEye * aGlobalScaleNext3D);
                basegfx::B3DPoint aScFixPos(aInverseViewToEye * aGlobalScaleFixPos3D);

                // constraints?
                switch(meWhatDragHdl)
                {
                    case HDL_LEFT:
                    case HDL_RIGHT:
                        // constrain to auf X -> Y equal
                        aScNext.setY(aScFixPos.getY());
                        break;
                    case HDL_UPPER:
                    case HDL_LOWER:
                        // constrain to auf Y -> X equal
                        aScNext.setX(aScFixPos.getX());
                        break;
                    default:
                        break;
                }

                // get scale vector in eye coordinates
                basegfx::B3DPoint aScaleVec(aScStart - aScFixPos);
                aScaleVec.setZ(1.0);

                if(aScaleVec.getX() != 0.0)
                {
                    aScaleVec.setX((aScNext.getX() - aScFixPos.getX()) / aScaleVec.getX());
                }
                else
                {
                    aScaleVec.setX(1.0);
                }

                if(aScaleVec.getY() != 0.0)
                {
                    aScaleVec.setY((aScNext.getY() - aScFixPos.getY()) / aScaleVec.getY());
                }
                else
                {
                    aScaleVec.setY(1.0);
                }

                // SHIFT-key used?
                if(rView.IsOrtho())
                {
                    if(fabs(aScaleVec.getX()) > fabs(aScaleVec.getY()))
                    {
                        // X is biggest
                        aScaleVec.setY(aScaleVec.getX());
                    }
                    else
                    {
                        // Y is biggest
                        aScaleVec.setX(aScaleVec.getY());
                    }
                }

                // build transformation
                basegfx::B3DHomMatrix aInverseOrientation(aViewInfo3D.getOrientation());
                aInverseOrientation.invert();

                basegfx::B3DHomMatrix aNewTrans = rCandidate.maInitTransform;
                aNewTrans *= rCandidate.maDisplayTransform;
                aNewTrans *= aViewInfo3D.getOrientation();
                aNewTrans.translate(-aScFixPos.getX(), -aScFixPos.getY(), -aScFixPos.getZ());
                aNewTrans.scale(aScaleVec.getX(), aScaleVec.getY(), aScaleVec.getZ());
                aNewTrans.translate(aScFixPos.getX(), aScFixPos.getY(), aScFixPos.getZ());
                aNewTrans *= aInverseOrientation;
                aNewTrans *= rCandidate.maInvDisplayTransform;

                // ...und anwenden
                rCandidate.maTransform = aNewTrans;

                if(mbMoveFull)
                {
                    rCandidate.mp3DObj->SetTransform(rCandidate.maTransform);
                }
                else
                {
                    Hide();
                    rCandidate.maWireframePoly.clear();
                    rCandidate.maWireframePoly = rCandidate.mp3DObj->CreateWireframe();
                    rCandidate.maWireframePoly.transform(rCandidate.maTransform);
                    Show();
                }
            }
        }
        maLastPos = rPnt;
        DragStat().NextMove(rPnt);
    }
}

/*************************************************************************
|*
\************************************************************************/

Pointer E3dDragMove::GetPointer() const
{
    return Pointer(POINTER_MOVE);
}

// eof