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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <drawinglayer/primitive2d/helplineprimitive2d.hxx>
21 : #include <basegfx/polygon/b2dpolygon.hxx>
22 : #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
23 : #include <basegfx/polygon/b2dpolygonclipper.hxx>
24 : #include <basegfx/tools/canvastools.hxx>
25 : #include <drawinglayer/geometry/viewinformation2d.hxx>
26 : #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
27 :
28 :
29 :
30 : using namespace com::sun::star;
31 :
32 :
33 :
34 : namespace drawinglayer
35 : {
36 : namespace primitive2d
37 : {
38 0 : Primitive2DSequence HelplinePrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
39 : {
40 0 : std::vector< BasePrimitive2D* > aTempPrimitiveTarget;
41 :
42 0 : if(!rViewInformation.getViewport().isEmpty() && !getDirection().equalZero())
43 : {
44 : // position to view coordinates, DashLen and DashLen in logic
45 0 : const basegfx::B2DPoint aViewPosition(rViewInformation.getObjectToViewTransformation() * getPosition());
46 :
47 0 : switch(getStyle())
48 : {
49 : default : // HELPLINESTYLE2D_POINT
50 : {
51 0 : const double fViewFixValue(15.0);
52 0 : basegfx::B2DVector aNormalizedDirection(getDirection());
53 0 : aNormalizedDirection.normalize();
54 0 : aNormalizedDirection *= fViewFixValue;
55 0 : const basegfx::B2DPoint aStartA(aViewPosition - aNormalizedDirection);
56 0 : const basegfx::B2DPoint aEndA(aViewPosition + aNormalizedDirection);
57 0 : basegfx::B2DPolygon aLineA;
58 0 : aLineA.append(aStartA);
59 0 : aLineA.append(aEndA);
60 0 : aLineA.transform(rViewInformation.getInverseObjectToViewTransformation());
61 0 : PolygonMarkerPrimitive2D* pNewA = new PolygonMarkerPrimitive2D(aLineA, getRGBColA(), getRGBColB(), getDiscreteDashLength());
62 0 : aTempPrimitiveTarget.push_back(pNewA);
63 :
64 0 : const basegfx::B2DVector aPerpendicularNormalizedDirection(basegfx::getPerpendicular(aNormalizedDirection));
65 0 : const basegfx::B2DPoint aStartB(aViewPosition - aPerpendicularNormalizedDirection);
66 0 : const basegfx::B2DPoint aEndB(aViewPosition + aPerpendicularNormalizedDirection);
67 0 : basegfx::B2DPolygon aLineB;
68 0 : aLineB.append(aStartB);
69 0 : aLineB.append(aEndB);
70 0 : aLineB.transform(rViewInformation.getInverseObjectToViewTransformation());
71 0 : PolygonMarkerPrimitive2D* pNewB = new PolygonMarkerPrimitive2D(aLineB, getRGBColA(), getRGBColB(), getDiscreteDashLength());
72 0 : aTempPrimitiveTarget.push_back(pNewB);
73 :
74 0 : break;
75 : }
76 : case HELPLINESTYLE2D_LINE :
77 : {
78 0 : basegfx::B2DPolygon aLine;
79 :
80 0 : if(basegfx::areParallel(getDirection(), basegfx::B2DVector(1.0, 0.0)))
81 : {
82 : // parallel to X-Axis, get cuts with Y-Axes
83 0 : const double fCutA((rViewInformation.getDiscreteViewport().getMinX() - aViewPosition.getX()) / getDirection().getX());
84 0 : const double fCutB((rViewInformation.getDiscreteViewport().getMaxX() - aViewPosition.getX()) / getDirection().getX());
85 0 : const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
86 0 : const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
87 0 : const bool bBothLeft(aPosA.getX() < rViewInformation.getDiscreteViewport().getMinX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMinX());
88 0 : const bool bBothRight(aPosA.getX() > rViewInformation.getDiscreteViewport().getMaxX() && aPosB.getX() < rViewInformation.getDiscreteViewport().getMaxX());
89 :
90 0 : if(!bBothLeft && !bBothRight)
91 : {
92 0 : aLine.append(aPosA);
93 0 : aLine.append(aPosB);
94 0 : }
95 : }
96 : else
97 : {
98 : // get cuts with X-Axes
99 0 : const double fCutA((rViewInformation.getDiscreteViewport().getMinY() - aViewPosition.getY()) / getDirection().getY());
100 0 : const double fCutB((rViewInformation.getDiscreteViewport().getMaxY() - aViewPosition.getY()) / getDirection().getY());
101 0 : const basegfx::B2DPoint aPosA(aViewPosition + (fCutA * getDirection()));
102 0 : const basegfx::B2DPoint aPosB(aViewPosition + (fCutB * getDirection()));
103 0 : const bool bBothAbove(aPosA.getY() < rViewInformation.getDiscreteViewport().getMinY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMinY());
104 0 : const bool bBothBelow(aPosA.getY() > rViewInformation.getDiscreteViewport().getMaxY() && aPosB.getY() < rViewInformation.getDiscreteViewport().getMaxY());
105 :
106 0 : if(!bBothAbove && !bBothBelow)
107 : {
108 0 : aLine.append(aPosA);
109 0 : aLine.append(aPosB);
110 0 : }
111 : }
112 :
113 0 : if(aLine.count())
114 : {
115 : // clip against visible area
116 0 : const basegfx::B2DPolyPolygon aResult(basegfx::tools::clipPolygonOnRange(aLine, rViewInformation.getDiscreteViewport(), true, true));
117 :
118 0 : for(sal_uInt32 a(0L); a < aResult.count(); a++)
119 : {
120 0 : basegfx::B2DPolygon aPart(aResult.getB2DPolygon(a));
121 0 : aPart.transform(rViewInformation.getInverseObjectToViewTransformation());
122 0 : PolygonMarkerPrimitive2D* pNew = new PolygonMarkerPrimitive2D(aPart, getRGBColA(), getRGBColB(), getDiscreteDashLength());
123 0 : aTempPrimitiveTarget.push_back(pNew);
124 0 : }
125 : }
126 :
127 0 : break;
128 : }
129 0 : }
130 : }
131 :
132 : // prepare return value
133 0 : Primitive2DSequence aRetval(aTempPrimitiveTarget.size());
134 :
135 0 : for(size_t a(0); a < aTempPrimitiveTarget.size(); a++)
136 : {
137 0 : const Primitive2DReference xRef(aTempPrimitiveTarget[a]);
138 0 : aRetval[a] = xRef;
139 0 : }
140 :
141 0 : return aRetval;
142 : }
143 :
144 0 : HelplinePrimitive2D::HelplinePrimitive2D(
145 : const basegfx::B2DPoint& rPosition,
146 : const basegfx::B2DVector& rDirection,
147 : HelplineStyle2D eStyle,
148 : const basegfx::BColor& rRGBColA,
149 : const basegfx::BColor& rRGBColB,
150 : double fDiscreteDashLength)
151 : : BufferedDecompositionPrimitive2D(),
152 : maPosition(rPosition),
153 : maDirection(rDirection),
154 : meStyle(eStyle),
155 : maRGBColA(rRGBColA),
156 : maRGBColB(rRGBColB),
157 : mfDiscreteDashLength(fDiscreteDashLength),
158 : maLastObjectToViewTransformation(),
159 0 : maLastViewport()
160 : {
161 0 : }
162 :
163 0 : bool HelplinePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
164 : {
165 0 : if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
166 : {
167 0 : const HelplinePrimitive2D& rCompare = static_cast<const HelplinePrimitive2D&>(rPrimitive);
168 :
169 0 : return (getPosition() == rCompare.getPosition()
170 0 : && getDirection() == rCompare.getDirection()
171 0 : && getStyle() == rCompare.getStyle()
172 0 : && getRGBColA() == rCompare.getRGBColA()
173 0 : && getRGBColB() == rCompare.getRGBColB()
174 0 : && getDiscreteDashLength() == rCompare.getDiscreteDashLength());
175 : }
176 :
177 0 : return false;
178 : }
179 :
180 0 : Primitive2DSequence HelplinePrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
181 : {
182 0 : ::osl::MutexGuard aGuard( m_aMutex );
183 :
184 0 : if(getBuffered2DDecomposition().hasElements())
185 : {
186 0 : if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation())
187 : {
188 : // conditions of last local decomposition have changed, delete
189 0 : const_cast< HelplinePrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DSequence());
190 : }
191 : }
192 :
193 0 : if(!getBuffered2DDecomposition().hasElements())
194 : {
195 : // remember ViewRange and ViewTransformation
196 0 : const_cast< HelplinePrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation();
197 0 : const_cast< HelplinePrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport();
198 : }
199 :
200 : // use parent implementation
201 0 : return BufferedDecompositionPrimitive2D::get2DDecomposition(rViewInformation);
202 : }
203 :
204 : // provide unique ID
205 0 : ImplPrimitive2DIDBlock(HelplinePrimitive2D, PRIMITIVE2D_ID_HELPLINEPRIMITIVE2D)
206 :
207 : } // end of namespace primitive2d
208 : } // end of namespace drawinglayer
209 :
210 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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