xref: /aoo42x/main/svx/source/svdraw/svdsnpv.cxx (revision cdf0e10c)

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 *
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 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
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 * 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.
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include <svx/svdsnpv.hxx>
#include <math.h>

#include <svx/svdetc.hxx>
#include <svx/svdobj.hxx>
#include <svx/svdpagv.hxx>
#include <svx/svdpage.hxx>
#include "svx/svditer.hxx"
#include <svx/sdr/overlay/overlayobjectlist.hxx>
#include <svx/sdr/overlay/overlaycrosshair.hxx>
#include <svx/sdr/overlay/overlayhelpline.hxx>
#include <svx/sdr/overlay/overlaymanager.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <svx/sdrpaintwindow.hxx>

////////////////////////////////////////////////////////////////////////////////////////////////////
// #114409#-1 Migrate PageOrigin
class ImplPageOriginOverlay
{
	// The OverlayObjects
	::sdr::overlay::OverlayObjectList				maObjects;

	// The current position in logical coodinates
	basegfx::B2DPoint								maPosition;

public:
	ImplPageOriginOverlay(const SdrPaintView& rView, const basegfx::B2DPoint& rStartPos);
	~ImplPageOriginOverlay();

	void SetPosition(const basegfx::B2DPoint& rNewPosition);
};

ImplPageOriginOverlay::ImplPageOriginOverlay(const SdrPaintView& rView, const basegfx::B2DPoint& rStartPos)
:	maPosition(rStartPos)
{
	for(sal_uInt32 a(0L); a < rView.PaintWindowCount(); a++)
	{
		SdrPaintWindow* pCandidate = rView.GetPaintWindow(a);
		::sdr::overlay::OverlayManager* pTargetOverlay = pCandidate->GetOverlayManager();

		if(pTargetOverlay)
		{
			::sdr::overlay::OverlayCrosshairStriped* aNew = new ::sdr::overlay::OverlayCrosshairStriped(
				maPosition);
			pTargetOverlay->add(*aNew);
			maObjects.append(*aNew);
		}
	}
}

ImplPageOriginOverlay::~ImplPageOriginOverlay()
{
	// The OverlayObjects are cleared using the destructor of OverlayObjectList.
	// That destructor calls clear() at the list which removes all objects from the
	// OverlayManager and deletes them.
}

void ImplPageOriginOverlay::SetPosition(const basegfx::B2DPoint& rNewPosition)
{
	if(rNewPosition != maPosition)
	{
		// apply to OverlayObjects
		for(sal_uInt32 a(0); a < maObjects.count(); a++)
		{
			sdr::overlay::OverlayCrosshairStriped* pCandidate =
				static_cast< sdr::overlay::OverlayCrosshairStriped* >(&maObjects.getOverlayObject(a));

			if(pCandidate)
			{
				pCandidate->setBasePosition(rNewPosition);
			}
		}

		// remember new position
		maPosition = rNewPosition;
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////
// #114409#-2 Migrate HelpLine
class ImplHelpLineOverlay
{
	// The OverlayObjects
	::sdr::overlay::OverlayObjectList				maObjects;

	// The current position in logical coodinates
	basegfx::B2DPoint								maPosition;

	// HelpLine specific stuff
	SdrPageView*									mpPageView;
	sal_uInt16										mnHelpLineNumber;
	SdrHelpLineKind									meHelpLineKind;

public:
	ImplHelpLineOverlay(const SdrPaintView& rView, const basegfx::B2DPoint& rStartPos,
		SdrPageView* pPageView, sal_uInt16 nHelpLineNumber, SdrHelpLineKind eKind);
	~ImplHelpLineOverlay();

	void SetPosition(const basegfx::B2DPoint& rNewPosition);

	// access to HelpLine specific stuff
	SdrPageView* GetPageView() const { return mpPageView; }
	sal_uInt16 GetHelpLineNumber() const { return mnHelpLineNumber; }
	SdrHelpLineKind GetHelpLineKind() const { return meHelpLineKind; }
};

ImplHelpLineOverlay::ImplHelpLineOverlay(
	const SdrPaintView& rView, const basegfx::B2DPoint& rStartPos,
	SdrPageView* pPageView, sal_uInt16 nHelpLineNumber, SdrHelpLineKind eKind)
:	maPosition(rStartPos),
	mpPageView(pPageView),
	mnHelpLineNumber(nHelpLineNumber),
	meHelpLineKind(eKind)
{
	for(sal_uInt32 a(0L); a < rView.PaintWindowCount(); a++)
	{
		SdrPaintWindow* pCandidate = rView.GetPaintWindow(a);
		::sdr::overlay::OverlayManager* pTargetOverlay = pCandidate->GetOverlayManager();

		if(pTargetOverlay)
		{
			::sdr::overlay::OverlayHelplineStriped* aNew = new ::sdr::overlay::OverlayHelplineStriped(
				maPosition, meHelpLineKind);
			pTargetOverlay->add(*aNew);
			maObjects.append(*aNew);
		}
	}
}

ImplHelpLineOverlay::~ImplHelpLineOverlay()
{
	// The OverlayObjects are cleared using the destructor of OverlayObjectList.
	// That destructor calls clear() at the list which removes all objects from the
	// OverlayManager and deletes them.
}

void ImplHelpLineOverlay::SetPosition(const basegfx::B2DPoint& rNewPosition)
{
	if(rNewPosition != maPosition)
	{
		// apply to OverlayObjects
		// apply to OverlayObjects
		for(sal_uInt32 a(0); a < maObjects.count(); a++)
		{
			sdr::overlay::OverlayHelplineStriped* pCandidate =
				static_cast< sdr::overlay::OverlayHelplineStriped* >(&maObjects.getOverlayObject(a));

			if(pCandidate)
			{
				pCandidate->setBasePosition(rNewPosition);
			}
		}

		// remember new position
		maPosition = rNewPosition;
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////
//
//  @@@@  @@  @@  @@@@  @@@@@   @@ @@ @@ @@@@@ @@   @@
// @@  @@ @@@ @@ @@  @@ @@  @@  @@ @@ @@ @@    @@   @@
// @@     @@@@@@ @@  @@ @@  @@  @@ @@ @@ @@    @@ @ @@
//  @@@@  @@@@@@ @@@@@@ @@@@@   @@@@@ @@ @@@@  @@@@@@@
//     @@ @@ @@@ @@  @@ @@       @@@  @@ @@    @@@@@@@
// @@  @@ @@  @@ @@  @@ @@       @@@  @@ @@    @@@ @@@
//  @@@@  @@  @@ @@  @@ @@        @   @@ @@@@@ @@   @@
//
////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////

void SdrSnapView::ClearVars()
{
	nMagnSizPix=4;
	bSnapEnab=sal_True;
	bGridSnap=sal_True;
	bSnapTo1Pix=sal_True;
	bBordSnap=sal_True;
	bHlplSnap=sal_True;
	bOFrmSnap=sal_True;
	bOPntSnap=sal_False;
	bOConSnap=sal_True;
	bMoveMFrmSnap=sal_True;
	bMoveOFrmSnap=sal_True;
	bMoveOPntSnap=sal_True;
	bMoveOConSnap=sal_True;
	bMoveSnapOnlyTopLeft=sal_False;
	bOrtho=sal_False;
	bBigOrtho=sal_True;
	nSnapAngle=1500;
	bAngleSnapEnab=sal_False;
	bMoveOnlyDragging=sal_False;
	bSlantButShear=sal_False;
	bCrookNoContortion=sal_False;
	eCrookMode=SDRCROOK_ROTATE;
	bHlplFixed=sal_False;
	bEliminatePolyPoints=sal_False;
	nEliminatePolyPointLimitAngle=0;

	// #114409#-1 Migrate PageOrigin
	BrkSetPageOrg();

	// #114409#-2 Migrate HelpLine
	BrkDragHelpLine();
}

SdrSnapView::SdrSnapView(SdrModel* pModel1, OutputDevice* pOut):
	SdrPaintView(pModel1,pOut),
	// #114409#-1 Migrate PageOrigin
	mpPageOriginOverlay(0L),
	// #114409#-2 Migrate HelpLine
	mpHelpLineOverlay(0L)
{
	ClearVars();
}

// #114409#-1 Migrate PageOrigin
SdrSnapView::~SdrSnapView()
{
	// #114409#-1 Migrate PageOrigin
	BrkSetPageOrg();

	// #114409#-2 Migrate HelpLine
	BrkDragHelpLine();
}

////////////////////////////////////////////////////////////////////////////////////////////////////

sal_Bool SdrSnapView::IsAction() const
{
	return IsSetPageOrg() || IsDragHelpLine() || SdrPaintView::IsAction();
}

void SdrSnapView::MovAction(const Point& rPnt)
{
	SdrPaintView::MovAction(rPnt);
	if (IsSetPageOrg()) {
		MovSetPageOrg(rPnt);
	}
	if (IsDragHelpLine()) {
		MovDragHelpLine(rPnt);
	}
}

void SdrSnapView::EndAction()
{
	if (IsSetPageOrg()) {
		EndSetPageOrg();
	}
	if (IsDragHelpLine()) {
		EndDragHelpLine();
	}
	SdrPaintView::EndAction();
}

void SdrSnapView::BckAction()
{
	BrkSetPageOrg();
	BrkDragHelpLine();
	SdrPaintView::BckAction();
}

void SdrSnapView::BrkAction()
{
	BrkSetPageOrg();
	BrkDragHelpLine();
	SdrPaintView::BrkAction();
}

void SdrSnapView::TakeActionRect(Rectangle& rRect) const
{
	if (IsSetPageOrg() || IsDragHelpLine()) {
		rRect=Rectangle(aDragStat.GetNow(),aDragStat.GetNow());
	} else {
		SdrPaintView::TakeActionRect(rRect);
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////

Point SdrSnapView::GetSnapPos(const Point& rPnt, const SdrPageView* pPV) const
{
	Point aPt(rPnt);
	SnapPos(aPt,pPV);
	return aPt;
}

#define NOT_SNAPPED 0x7FFFFFFF
sal_uInt16 SdrSnapView::SnapPos(Point& rPnt, const SdrPageView* pPV) const
{
	if (!bSnapEnab) return SDRSNAP_NOTSNAPPED;
	sal_Bool bPVOfs=sal_False;
	long x=rPnt.X();
	long y=rPnt.Y();
	if (pPV==NULL) {
		bPVOfs=sal_True;
		pPV=GetSdrPageView();
		if (pPV==NULL) return SDRSNAP_NOTSNAPPED;
	}

	long dx=NOT_SNAPPED;
	long dy=NOT_SNAPPED;
	long dx1,dy1;
	long mx=aMagnSiz.Width();
	long my=aMagnSiz.Height();
	if (bHlplVisible && bHlplSnap && !IsDragHelpLine())
	{
		const SdrHelpLineList& rHLL=pPV->GetHelpLines();
		sal_uInt16 nAnz=rHLL.GetCount();
		for (sal_uInt16 i=nAnz; i>0;) {
			i--;
			const SdrHelpLine& rHL=rHLL[i];
			const Point& rPos=rHL.GetPos();
			switch (rHL.GetKind()) {
				case SDRHELPLINE_VERTICAL: {
					long a=x-rPos.X();
					if (Abs(a)<=mx) { dx1=-a; if (Abs(dx1)<Abs(dx)) dx=dx1; }
				} break;
				case SDRHELPLINE_HORIZONTAL: {
					long b=y-rPos.Y();
					if (Abs(b)<=my) { dy1=-b; if (Abs(dy1)<Abs(dy)) dy=dy1; }
				} break;
				case SDRHELPLINE_POINT: {
					long a=x-rPos.X();
					long b=y-rPos.Y();
					if (Abs(a)<=mx && Abs(b)<=my) {
						dx1=-a; dy1=-b;
						if (Abs(dx1)<Abs(dx) && Abs(dy1)<Abs(dy)) { dx=dx1; dy=dy1; }
					}
				} break;
			} // switch
		}
	}
	if (bBordVisible && bBordSnap) {
		SdrPage* pPage=pPV->GetPage();
		long xs=pPage->GetWdt();
		long ys=pPage->GetHgt();
		long lft=pPage->GetLftBorder();
		long rgt=pPage->GetRgtBorder();
		long upp=pPage->GetUppBorder();
		long lwr=pPage->GetLwrBorder();
		long a;
		a=x- lft    ; if (Abs(a)<=mx) { dx1=-a; if (Abs(dx1)<Abs(dx)) dx=dx1; } // linker Rand
		a=x-(xs-rgt); if (Abs(a)<=mx) { dx1=-a; if (Abs(dx1)<Abs(dx)) dx=dx1; } // rechter Rand
		a=x         ; if (Abs(a)<=mx) { dx1=-a; if (Abs(dx1)<Abs(dx)) dx=dx1; } // linke Papierkante
		a=x- xs     ; if (Abs(a)<=mx) { dx1=-a; if (Abs(dx1)<Abs(dx)) dx=dx1; } // rechte Papierkante
		a=y- upp    ; if (Abs(a)<=my) { dy1=-a; if (Abs(dy1)<Abs(dy)) dy=dy1; } // linker Rand
		a=y-(ys-lwr); if (Abs(a)<=my) { dy1=-a; if (Abs(dy1)<Abs(dy)) dy=dy1; } // rechter Rand
		a=y         ; if (Abs(a)<=my) { dy1=-a; if (Abs(dy1)<Abs(dy)) dy=dy1; } // linke Papierkante
		a=y- ys     ; if (Abs(a)<=my) { dy1=-a; if (Abs(dy1)<Abs(dy)) dy=dy1; } // rechte Papierkante
	}
	if (bOFrmSnap || bOPntSnap /*|| (bConnVisible && bOConSnap)*/) {
		sal_uIntPtr nMaxPointSnapCount=200;
		sal_uIntPtr nMaxFrameSnapCount=200;

		// #97981# go back to IM_DEEPNOGROUPS runthrough for snap to object comparisons
		SdrObjListIter aIter(*pPV->GetPage(),/*IM_FLAT*/IM_DEEPNOGROUPS,sal_True);

		while (aIter.IsMore() && (nMaxPointSnapCount>0 || nMaxFrameSnapCount>0)) {
			SdrObject* pO=aIter.Next();
			Rectangle aRect(pO->GetCurrentBoundRect());
			aRect.Left  ()-=mx;
			aRect.Right ()+=mx;
			aRect.Top   ()-=my;
			aRect.Bottom()+=my;
			if (aRect.IsInside(rPnt)) {
				if (bOPntSnap && nMaxPointSnapCount>0)
				{
					sal_uInt32 nAnz(pO->GetSnapPointCount());
					for (sal_uInt32 i(0L); i < nAnz && nMaxPointSnapCount > 0L; i++)
					{
						Point aP(pO->GetSnapPoint(i));
						dx1=x-aP.X();
						dy1=y-aP.Y();
						if (Abs(dx1)<=mx && Abs(dy1)<=my && Abs(dx1)<Abs(dx) && Abs(dy1)<Abs(dy)) {
							dx=-dx1;
							dy=-dy1;
						}
						nMaxPointSnapCount--;
					}
				}
				if (bOFrmSnap && nMaxFrameSnapCount>0) {
					Rectangle aLog(pO->GetSnapRect());
					Rectangle aR1(aLog);
					aR1.Left  ()-=mx;
					aR1.Right ()+=mx;
					aR1.Top   ()-=my;
					aR1.Bottom()+=my;
					if (aR1.IsInside(rPnt)) {
						if (Abs(x-aLog.Left  ())<=mx) { dx1=-(x-aLog.Left  ()); if (Abs(dx1)<Abs(dx)) dx=dx1; }
						if (Abs(x-aLog.Right ())<=mx) { dx1=-(x-aLog.Right ()); if (Abs(dx1)<Abs(dx)) dx=dx1; }
						if (Abs(y-aLog.Top   ())<=my) { dy1=-(y-aLog.Top   ()); if (Abs(dy1)<Abs(dy)) dy=dy1; }
						if (Abs(y-aLog.Bottom())<=my) { dy1=-(y-aLog.Bottom()); if (Abs(dy1)<Abs(dy)) dy=dy1; }
					}
					nMaxFrameSnapCount--;
				}
			}
		}
	}
	if(bGridSnap)
	{
		double fSnapWidth = aSnapWdtX;
		if(dx == NOT_SNAPPED && fSnapWidth != 0.0)
		{
			double fx = (double)x;

			// round statt trunc
			if(fx - (double)pPV->GetPageOrigin().X() >= 0.0)
				fx += fSnapWidth / 2.0;
			else
				fx -= fSnapWidth / 2.0;

			x = (long)((fx - (double)pPV->GetPageOrigin().X()) / fSnapWidth);
			x = (long)((double)x * fSnapWidth + (double)pPV->GetPageOrigin().X());
			dx = 0;
		}
		fSnapWidth = aSnapWdtY;
		if(dy == NOT_SNAPPED && fSnapWidth)
		{
			double fy = (double)y;

			// round statt trunc
			if(fy - (double)pPV->GetPageOrigin().Y() >= 0.0)
				fy += fSnapWidth / 2.0;
			else
				fy -= fSnapWidth / 2.0;

			y = (long)((fy - (double)pPV->GetPageOrigin().Y()) / fSnapWidth);
			y = (long)((double)y * fSnapWidth + (double)pPV->GetPageOrigin().Y());
			dy = 0;
		}
	}
	sal_Bool bRet=SDRSNAP_NOTSNAPPED;
	if (dx==NOT_SNAPPED) dx=0; else bRet|=SDRSNAP_XSNAPPED;
	if (dy==NOT_SNAPPED) dy=0; else bRet|=SDRSNAP_YSNAPPED;
	rPnt.X()=x+dx;
	rPnt.Y()=y+dy;
	return bRet;
}

void SdrSnapView::CheckSnap(const Point& rPt, const SdrPageView* pPV, long& nBestXSnap, long& nBestYSnap, bool& bXSnapped, bool& bYSnapped) const
{
	Point aPt(rPt);
	sal_uInt16 nRet=SnapPos(aPt,pPV);
	aPt-=rPt;
	if ((nRet & SDRSNAP_XSNAPPED) !=0) {
		if (bXSnapped) {
			if (Abs(aPt.X())<Abs(nBestXSnap)) {
				nBestXSnap=aPt.X();
			}
		} else {
			nBestXSnap=aPt.X();
			bXSnapped=sal_True;
		}
	}
	if ((nRet & SDRSNAP_YSNAPPED) !=0) {
		if (bYSnapped) {
			if (Abs(aPt.Y())<Abs(nBestYSnap)) {
				nBestYSnap=aPt.Y();
			}
		} else {
			nBestYSnap=aPt.Y();
			bYSnapped=sal_True;
		}
	}
}

sal_uInt16 SdrSnapView::SnapRect(const Rectangle& rRect, const SdrPageView* pPV, long& rDX, long& rDY) const
{
	long nBestXSnap=0;
	long nBestYSnap=0;
	bool bXSnapped=sal_False;
	bool bYSnapped=sal_False;
	CheckSnap(rRect.TopLeft()    ,pPV,nBestXSnap,nBestYSnap,bXSnapped,bYSnapped);
	if (!bMoveSnapOnlyTopLeft) {
		CheckSnap(rRect.TopRight()   ,pPV,nBestXSnap,nBestYSnap,bXSnapped,bYSnapped);
		CheckSnap(rRect.BottomLeft() ,pPV,nBestXSnap,nBestYSnap,bXSnapped,bYSnapped);
		CheckSnap(rRect.BottomRight(),pPV,nBestXSnap,nBestYSnap,bXSnapped,bYSnapped);
	}
	rDX=nBestXSnap;
	rDY=nBestYSnap;
	sal_uInt16 nRet=0;
	if (bXSnapped) nRet+=SDRSNAP_XSNAPPED;
	if (bYSnapped) nRet+=SDRSNAP_YSNAPPED;
	return nRet;
}

////////////////////////////////////////////////////////////////////////////////////////////////////

sal_Bool SdrSnapView::BegSetPageOrg(const Point& rPnt)
{
	BrkAction();

	DBG_ASSERT(0L == mpPageOriginOverlay, "SdrSnapView::BegSetPageOrg: There exists a ImplPageOriginOverlay (!)");
	basegfx::B2DPoint aStartPos(rPnt.X(), rPnt.Y());
	mpPageOriginOverlay = new ImplPageOriginOverlay(*this, aStartPos);
	aDragStat.Reset(GetSnapPos(rPnt,NULL));

	return sal_True;
}

void SdrSnapView::MovSetPageOrg(const Point& rPnt)
{
	if(IsSetPageOrg())
	{
		aDragStat.NextMove(GetSnapPos(rPnt,NULL));
		DBG_ASSERT(mpPageOriginOverlay, "SdrSnapView::MovSetPageOrg: no ImplPageOriginOverlay (!)");
		basegfx::B2DPoint aNewPos(aDragStat.GetNow().X(), aDragStat.GetNow().Y());
		mpPageOriginOverlay->SetPosition(aNewPos);
	}
}

sal_Bool SdrSnapView::EndSetPageOrg()
{
	sal_Bool bRet(sal_False);

	if(IsSetPageOrg())
	{
		SdrPageView* pPV = GetSdrPageView();

		if(pPV)
		{
			Point aPnt(aDragStat.GetNow());
			pPV->SetPageOrigin(aPnt);
			bRet = sal_True;
		}

		// cleanup
		BrkSetPageOrg();
	}

	return bRet;
}

void SdrSnapView::BrkSetPageOrg()
{
	if(IsSetPageOrg())
	{
		DBG_ASSERT(mpPageOriginOverlay, "SdrSnapView::MovSetPageOrg: no ImplPageOriginOverlay (!)");
		delete mpPageOriginOverlay;
		mpPageOriginOverlay = 0L;
	}
}

////////////////////////////////////////////////////////////////////////////////////////////////////

sal_Bool SdrSnapView::PickHelpLine(const Point& rPnt, short nTol, const OutputDevice& rOut, sal_uInt16& rnHelpLineNum, SdrPageView*& rpPV) const
{
	rpPV=NULL;
	nTol=ImpGetHitTolLogic(nTol,&rOut);
	SdrPageView* pPV = GetSdrPageView();

	if(pPV)
	{
		Point aPnt(rPnt);
		sal_uInt16 nIndex=pPV->GetHelpLines().HitTest(aPnt,sal_uInt16(nTol),rOut);
		if (nIndex!=SDRHELPLINE_NOTFOUND) {
			rpPV=pPV;
			rnHelpLineNum=nIndex;
			return sal_True;
		}
	}
	return sal_False;
}

// start HelpLine drag for new HelpLine
sal_Bool SdrSnapView::BegDragHelpLine(sal_uInt16 nHelpLineNum, SdrPageView* pPV)
{
	sal_Bool bRet(sal_False);

	if(!bHlplFixed)
	{
		BrkAction();

		if(pPV && nHelpLineNum < pPV->GetHelpLines().GetCount())
		{
			const SdrHelpLineList& rHelpLines = pPV->GetHelpLines();
			const SdrHelpLine& rHelpLine = rHelpLines[nHelpLineNum];
			Point aHelpLinePos = rHelpLine.GetPos(); // + pPV->GetOffset();
			basegfx::B2DPoint aStartPos(aHelpLinePos.X(), aHelpLinePos.Y());

			DBG_ASSERT(0L == mpHelpLineOverlay, "SdrSnapView::BegDragHelpLine: There exists a ImplHelpLineOverlay (!)");
			mpHelpLineOverlay = new ImplHelpLineOverlay(*this, aStartPos, pPV, nHelpLineNum, rHelpLine.GetKind());

			aDragStat.Reset(GetSnapPos(aHelpLinePos, pPV));
			aDragStat.SetMinMove(ImpGetMinMovLogic(-3, 0L));

			bRet = sal_True;
		}
	}

	return bRet;
}

// start HelpLine drag with existing HelpLine
sal_Bool SdrSnapView::BegDragHelpLine(const Point& rPnt, SdrHelpLineKind eNewKind)
{
	sal_Bool bRet(sal_False);

	BrkAction();

	if(GetSdrPageView())
	{
		DBG_ASSERT(0L == mpHelpLineOverlay, "SdrSnapView::BegDragHelpLine: There exists a ImplHelpLineOverlay (!)");
		basegfx::B2DPoint aStartPos(rPnt.X(), rPnt.Y());
		mpHelpLineOverlay = new ImplHelpLineOverlay(*this, aStartPos, 0L, 0, eNewKind);
		aDragStat.Reset(GetSnapPos(rPnt, 0L));
		bRet = sal_True;
	}

	return bRet;
}

Pointer SdrSnapView::GetDraggedHelpLinePointer() const
{
	if(IsDragHelpLine())
	{
		switch(mpHelpLineOverlay->GetHelpLineKind())
		{
			case SDRHELPLINE_VERTICAL  : return Pointer(POINTER_ESIZE);
			case SDRHELPLINE_HORIZONTAL: return Pointer(POINTER_SSIZE);
			default                    : return Pointer(POINTER_MOVE);
		}
	}

	return Pointer(POINTER_MOVE);
}

void SdrSnapView::MovDragHelpLine(const Point& rPnt)
{
	if(IsDragHelpLine() && aDragStat.CheckMinMoved(rPnt))
	{
		Point aPnt(GetSnapPos(rPnt, 0L));

		if(aPnt != aDragStat.GetNow())
		{
			aDragStat.NextMove(aPnt);
			DBG_ASSERT(mpHelpLineOverlay, "SdrSnapView::MovDragHelpLine: no ImplHelpLineOverlay (!)");
			basegfx::B2DPoint aNewPos(aDragStat.GetNow().X(), aDragStat.GetNow().Y());
			mpHelpLineOverlay->SetPosition(aNewPos);
		}
	}
}

sal_Bool SdrSnapView::EndDragHelpLine()
{
	sal_Bool bRet(sal_False);

	if(IsDragHelpLine())
	{
		if(aDragStat.IsMinMoved())
		{
			SdrPageView* pPageView = mpHelpLineOverlay->GetPageView();

			if(pPageView)
			{
				// moved existing one
				Point aPnt(aDragStat.GetNow());
				const SdrHelpLineList& rHelpLines = pPageView->GetHelpLines();
				SdrHelpLine aChangedHelpLine = rHelpLines[mpHelpLineOverlay->GetHelpLineNumber()];
				aChangedHelpLine.SetPos(aPnt);
				pPageView->SetHelpLine(mpHelpLineOverlay->GetHelpLineNumber(), aChangedHelpLine);

				bRet = sal_True;
			}
			else
			{
				// create new one
				pPageView = GetSdrPageView();

				if(pPageView)
				{
					Point aPnt(aDragStat.GetNow());
					SdrHelpLine aNewHelpLine(mpHelpLineOverlay->GetHelpLineKind(), aPnt);
					pPageView->InsertHelpLine(aNewHelpLine);

					bRet = sal_True;
				}
			}
		}

		// cleanup
		BrkDragHelpLine();
	}

	return bRet;
}

void SdrSnapView::BrkDragHelpLine()
{
	if(IsDragHelpLine())
	{
		DBG_ASSERT(mpHelpLineOverlay, "SdrSnapView::EndDragHelpLine: no ImplHelpLineOverlay (!)");
		delete mpHelpLineOverlay;
		mpHelpLineOverlay = 0L;
	}
}

// eof