cc15806b52
which lets us avoid constructing the decomposition when we are only interesting in the bounding box, e.g. for hit testing Change-Id: Icd8d430b75d207063f1db70e5a0822d5d82a7d00 Reviewed-on: https://gerrit.libreoffice.org/30835 Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk> Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>
342 lines
16 KiB
C++
342 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <drawinglayer/primitive2d/gridprimitive2d.hxx>
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#include <basegfx/tools/canvastools.hxx>
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#include <drawinglayer/primitive2d/pointarrayprimitive2d.hxx>
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#include <drawinglayer/primitive2d/markerarrayprimitive2d.hxx>
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#include <drawinglayer/geometry/viewinformation2d.hxx>
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#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
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#include <basegfx/matrix/b2dhommatrixtools.hxx>
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using namespace com::sun::star;
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namespace drawinglayer
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{
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namespace primitive2d
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{
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void GridPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
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{
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if(!rViewInformation.getViewport().isEmpty() && getWidth() > 0.0 && getHeight() > 0.0)
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{
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// decompose grid matrix to get logic size
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basegfx::B2DVector aScale, aTranslate;
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double fRotate, fShearX;
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getTransform().decompose(aScale, aTranslate, fRotate, fShearX);
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// create grid matrix which transforms from scaled logic to view
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basegfx::B2DHomMatrix aRST(basegfx::tools::createShearXRotateTranslateB2DHomMatrix(
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fShearX, fRotate, aTranslate.getX(), aTranslate.getY()));
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aRST *= rViewInformation.getObjectToViewTransformation();
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// get step widths
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double fStepX(getWidth());
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double fStepY(getHeight());
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const double fMinimalStep(10.0);
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// guarantee a step width of 10.0
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if(basegfx::fTools::less(fStepX, fMinimalStep))
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{
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fStepX = fMinimalStep;
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}
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if(basegfx::fTools::less(fStepY, fMinimalStep))
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{
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fStepY = fMinimalStep;
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}
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// get relative distances in view coordinates
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double fViewStepX((rViewInformation.getObjectToViewTransformation() * basegfx::B2DVector(fStepX, 0.0)).getLength());
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double fViewStepY((rViewInformation.getObjectToViewTransformation() * basegfx::B2DVector(0.0, fStepY)).getLength());
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double fSmallStepX(1.0), fViewSmallStepX(1.0), fSmallStepY(1.0), fViewSmallStepY(1.0);
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sal_uInt32 nSmallStepsX(0L), nSmallStepsY(0L);
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// setup subdivisions
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if(getSubdivisionsX())
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{
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fSmallStepX = fStepX / getSubdivisionsX();
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fViewSmallStepX = fViewStepX / getSubdivisionsX();
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}
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if(getSubdivisionsY())
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{
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fSmallStepY = fStepY / getSubdivisionsY();
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fViewSmallStepY = fViewStepY / getSubdivisionsY();
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}
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// correct step width
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while(fViewStepX < getSmallestViewDistance())
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{
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fViewStepX *= 2.0;
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fStepX *= 2.0;
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}
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while(fViewStepY < getSmallestViewDistance())
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{
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fViewStepY *= 2.0;
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fStepY *= 2.0;
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}
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// correct small step width
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if(getSubdivisionsX())
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{
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while(fViewSmallStepX < getSmallestSubdivisionViewDistance())
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{
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fViewSmallStepX *= 2.0;
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fSmallStepX *= 2.0;
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}
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nSmallStepsX = (sal_uInt32)(fStepX / fSmallStepX);
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}
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if(getSubdivisionsY())
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{
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while(fViewSmallStepY < getSmallestSubdivisionViewDistance())
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{
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fViewSmallStepY *= 2.0;
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fSmallStepY *= 2.0;
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}
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nSmallStepsY = (sal_uInt32)(fStepY / fSmallStepY);
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}
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// calculate extended viewport in which grid points may lie at all
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basegfx::B2DRange aExtendedViewport;
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if(rViewInformation.getDiscreteViewport().isEmpty())
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{
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// not set, use logic size to travel over all potential grid points
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aExtendedViewport = basegfx::B2DRange(0.0, 0.0, aScale.getX(), aScale.getY());
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}
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else
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{
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// transform unit range to discrete view
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aExtendedViewport = basegfx::B2DRange(0.0, 0.0, 1.0, 1.0);
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basegfx::B2DHomMatrix aTrans(rViewInformation.getObjectToViewTransformation() * getTransform());
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aExtendedViewport.transform(aTrans);
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// intersect with visible part
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aExtendedViewport.intersect(rViewInformation.getDiscreteViewport());
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if(!aExtendedViewport.isEmpty())
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{
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// convert back and apply scale
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aTrans.invert();
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aTrans.scale(aScale.getX(), aScale.getY());
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aExtendedViewport.transform(aTrans);
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// crop start/end in X/Y to multiples of logical step width
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const double fHalfCrossSize((rViewInformation.getInverseObjectToViewTransformation() * basegfx::B2DVector(3.0, 0.0)).getLength());
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const double fMinX(floor((aExtendedViewport.getMinX() - fHalfCrossSize) / fStepX) * fStepX);
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const double fMaxX(ceil((aExtendedViewport.getMaxX() + fHalfCrossSize) / fStepX) * fStepX);
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const double fMinY(floor((aExtendedViewport.getMinY() - fHalfCrossSize) / fStepY) * fStepY);
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const double fMaxY(ceil((aExtendedViewport.getMaxY() + fHalfCrossSize) / fStepY) * fStepY);
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// put to aExtendedViewport and crop on object logic size
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aExtendedViewport = basegfx::B2DRange(
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std::max(fMinX, 0.0),
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std::max(fMinY, 0.0),
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std::min(fMaxX, aScale.getX()),
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std::min(fMaxY, aScale.getY()));
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}
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}
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if(!aExtendedViewport.isEmpty())
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{
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// prepare point vectors for point and cross markers
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std::vector< basegfx::B2DPoint > aPositionsPoint;
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std::vector< basegfx::B2DPoint > aPositionsCross;
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for(double fX(aExtendedViewport.getMinX()); fX < aExtendedViewport.getMaxX(); fX += fStepX)
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{
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const bool bXZero(basegfx::fTools::equalZero(fX));
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for(double fY(aExtendedViewport.getMinY()); fY < aExtendedViewport.getMaxY(); fY += fStepY)
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{
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const bool bYZero(basegfx::fTools::equalZero(fY));
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if(!bXZero && !bYZero)
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{
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// get discrete position and test against 3x3 area surrounding it
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// since it's a cross
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const double fHalfCrossSize(3.0 * 0.5);
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const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fX, fY));
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const basegfx::B2DRange aDiscreteRangeCross(
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aViewPos.getX() - fHalfCrossSize, aViewPos.getY() - fHalfCrossSize,
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aViewPos.getX() + fHalfCrossSize, aViewPos.getY() + fHalfCrossSize);
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if(rViewInformation.getDiscreteViewport().overlaps(aDiscreteRangeCross))
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{
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const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos);
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aPositionsCross.push_back(aLogicPos);
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}
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}
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if(getSubdivisionsX() && !bYZero)
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{
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double fF(fX + fSmallStepX);
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for(sal_uInt32 a(1); a < nSmallStepsX && fF < aExtendedViewport.getMaxX(); a++, fF += fSmallStepX)
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{
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const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fF, fY));
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if(rViewInformation.getDiscreteViewport().isInside(aViewPos))
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{
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const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos);
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aPositionsPoint.push_back(aLogicPos);
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}
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}
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}
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if(getSubdivisionsY() && !bXZero)
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{
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double fF(fY + fSmallStepY);
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for(sal_uInt32 a(1); a < nSmallStepsY && fF < aExtendedViewport.getMaxY(); a++, fF += fSmallStepY)
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{
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const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fX, fF));
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if(rViewInformation.getDiscreteViewport().isInside(aViewPos))
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{
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const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos);
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aPositionsPoint.push_back(aLogicPos);
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}
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}
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}
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}
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}
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// prepare return value
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const sal_uInt32 nCountPoint(aPositionsPoint.size());
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const sal_uInt32 nCountCross(aPositionsCross.size());
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// add PointArrayPrimitive2D if point markers were added
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if(nCountPoint)
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{
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rContainer.push_back(new PointArrayPrimitive2D(aPositionsPoint, getBColor()));
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}
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// add MarkerArrayPrimitive2D if cross markers were added
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if(nCountCross)
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{
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if(!getSubdivisionsX() && !getSubdivisionsY())
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{
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// no subdivisions, so fall back to points at grid positions, no need to
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// visualize a difference between divisions and sub-divisions
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rContainer.push_back(new PointArrayPrimitive2D(aPositionsCross, getBColor()));
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}
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else
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{
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rContainer.push_back(new MarkerArrayPrimitive2D(aPositionsCross, getCrossMarker()));
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}
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}
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}
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}
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}
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GridPrimitive2D::GridPrimitive2D(
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const basegfx::B2DHomMatrix& rTransform,
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double fWidth,
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double fHeight,
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double fSmallestViewDistance,
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double fSmallestSubdivisionViewDistance,
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sal_uInt32 nSubdivisionsX,
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sal_uInt32 nSubdivisionsY,
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const basegfx::BColor& rBColor,
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const BitmapEx& rCrossMarker)
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: BufferedDecompositionPrimitive2D(),
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maTransform(rTransform),
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mfWidth(fWidth),
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mfHeight(fHeight),
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mfSmallestViewDistance(fSmallestViewDistance),
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mfSmallestSubdivisionViewDistance(fSmallestSubdivisionViewDistance),
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mnSubdivisionsX(nSubdivisionsX),
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mnSubdivisionsY(nSubdivisionsY),
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maBColor(rBColor),
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maCrossMarker(rCrossMarker),
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maLastObjectToViewTransformation(),
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maLastViewport()
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{
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}
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bool GridPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
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{
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if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
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{
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const GridPrimitive2D& rCompare = static_cast<const GridPrimitive2D&>(rPrimitive);
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return (getTransform() == rCompare.getTransform()
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&& getWidth() == rCompare.getWidth()
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&& getHeight() == rCompare.getHeight()
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&& getSmallestViewDistance() == rCompare.getSmallestViewDistance()
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&& getSmallestSubdivisionViewDistance() == rCompare.getSmallestSubdivisionViewDistance()
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&& getSubdivisionsX() == rCompare.getSubdivisionsX()
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&& getSubdivisionsY() == rCompare.getSubdivisionsY()
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&& getBColor() == rCompare.getBColor()
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&& getCrossMarker() == rCompare.getCrossMarker());
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}
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return false;
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}
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basegfx::B2DRange GridPrimitive2D::getB2DRange(const geometry::ViewInformation2D& rViewInformation) const
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{
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// get object's range
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basegfx::B2DRange aUnitRange(0.0, 0.0, 1.0, 1.0);
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aUnitRange.transform(getTransform());
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// intersect with visible part
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aUnitRange.intersect(rViewInformation.getViewport());
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return aUnitRange;
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}
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void GridPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const
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{
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::osl::MutexGuard aGuard( m_aMutex );
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if(!getBuffered2DDecomposition().empty())
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{
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if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation())
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{
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// conditions of last local decomposition have changed, delete
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const_cast< GridPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer());
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}
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}
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if(getBuffered2DDecomposition().empty())
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{
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// remember ViewRange and ViewTransformation
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const_cast< GridPrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation();
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const_cast< GridPrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport();
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}
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// use parent implementation
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BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation);
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}
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// provide unique ID
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ImplPrimitive2DIDBlock(GridPrimitive2D, PRIMITIVE2D_ID_GRIDPRIMITIVE2D)
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} // end of namespace primitive2d
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} // end of namespace drawinglayer
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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