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 <PolarLabelPositionHelper.hxx>
21 #include <PlottingPositionHelper.hxx>
22 #include <basegfx/vector/b2dvector.hxx>
23 #include <basegfx/vector/b2ivector.hxx>
24
25 #include <com/sun/star/chart/DataLabelPlacement.hpp>
26
27 namespace chart
28 {
29 using namespace ::com::sun::star;
30 using namespace ::com::sun::star::chart2;
31
PolarLabelPositionHelper(PolarPlottingPositionHelper * pPosHelper,sal_Int32 nDimensionCount,const uno::Reference<drawing::XShapes> & xLogicTarget,ShapeFactory * pShapeFactory)32 PolarLabelPositionHelper::PolarLabelPositionHelper(
33 PolarPlottingPositionHelper* pPosHelper
34 , sal_Int32 nDimensionCount
35 , const uno::Reference< drawing::XShapes >& xLogicTarget
36 , ShapeFactory* pShapeFactory )
37 : LabelPositionHelper( nDimensionCount, xLogicTarget, pShapeFactory )
38 , m_pPosHelper(pPosHelper)
39 {
40 }
41
~PolarLabelPositionHelper()42 PolarLabelPositionHelper::~PolarLabelPositionHelper()
43 {
44 }
45
getLabelScreenPositionAndAlignmentForLogicValues(LabelAlignment & rAlignment,double fLogicValueOnAngleAxis,double fLogicValueOnRadiusAxis,double fLogicZ,sal_Int32 nScreenValueOffsetInRadiusDirection) const46 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues(
47 LabelAlignment& rAlignment
48 , double fLogicValueOnAngleAxis
49 , double fLogicValueOnRadiusAxis
50 , double fLogicZ
51 , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
52 {
53 double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis );
54 double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis );
55
56 return getLabelScreenPositionAndAlignmentForUnitCircleValues(
57 rAlignment, css::chart::DataLabelPlacement::OUTSIDE
58 , fUnitCircleAngleDegree, 0.0
59 , fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection );
60 }
61
getLabelScreenPositionAndAlignmentForUnitCircleValues(LabelAlignment & rAlignment,sal_Int32 nLabelPlacement,double fUnitCircleStartAngleDegree,double fUnitCircleWidthAngleDegree,double fUnitCircleInnerRadius,double fUnitCircleOuterRadius,double fLogicZ,sal_Int32 nScreenValueOffsetInRadiusDirection) const62 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues(
63 LabelAlignment& rAlignment, sal_Int32 nLabelPlacement
64 , double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree
65 , double fUnitCircleInnerRadius, double fUnitCircleOuterRadius
66 , double fLogicZ
67 , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
68 {
69 bool bCenter = (nLabelPlacement != css::chart::DataLabelPlacement::OUTSIDE)
70 && (nLabelPlacement != css::chart::DataLabelPlacement::INSIDE);
71
72 double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0;
73 double fRadius = 0.0;
74 if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polar coordinate system
75 fRadius = fUnitCircleOuterRadius;
76 else
77 fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ;
78
79 awt::Point aRet( transformSceneToScreenPosition(
80 m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) );
81
82 if(m_nDimensionCount==3 && nLabelPlacement == css::chart::DataLabelPlacement::OUTSIDE)
83 {
84 //check whether the upper or the downer edge is more distant from the center
85 //take the farthest point to put the label to
86
87 awt::Point aP0( transformSceneToScreenPosition(
88 m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) );
89 awt::Point aP1(aRet);
90 awt::Point aP2( transformSceneToScreenPosition(
91 m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) );
92
93 ::basegfx::B2DVector aV0( aP0.X, aP0.Y );
94 ::basegfx::B2DVector aV1( aP1.X, aP1.Y );
95 ::basegfx::B2DVector aV2( aP2.X, aP2.Y );
96
97 double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength();
98 double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength();
99
100 if(fL2>fL1)
101 aRet = aP2;
102
103 //calculate new angle for alignment
104 double fDX = aRet.X-aP0.X;
105 double fDY = aRet.Y-aP0.Y;
106 fDY*=-1.0;//drawing layer has inverse y values
107 if( fDX != 0.0 )
108 {
109 fAngleDegree = basegfx::rad2deg(atan(fDY/fDX));
110 if(fDX<0.0)
111 fAngleDegree+=180.0;
112 }
113 else
114 {
115 if(fDY>0.0)
116 fAngleDegree = 90.0;
117 else
118 fAngleDegree = 270.0;
119 }
120 }
121 //set LabelAlignment
122 if( !bCenter )
123 {
124 // tdf#123504: both 0 and 360 are valid and different values here!
125 while (fAngleDegree > 360.0)
126 fAngleDegree -= 360.0;
127 while (fAngleDegree < 0.0)
128 fAngleDegree += 360.0;
129
130 bool bOutside = nLabelPlacement == css::chart::DataLabelPlacement::OUTSIDE;
131
132 if(fAngleDegree==0.0)
133 rAlignment = LABEL_ALIGN_CENTER;
134 else if(fAngleDegree<=22.5)
135 rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
136 else if(fAngleDegree<67.5)
137 rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM;
138 else if(fAngleDegree<112.5)
139 rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM;
140 else if(fAngleDegree<=157.5)
141 rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM;
142 else if(fAngleDegree<=202.5)
143 rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT;
144 else if(fAngleDegree<247.5)
145 rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP;
146 else if(fAngleDegree<292.5)
147 rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP;
148 else if(fAngleDegree<337.5)
149 rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP;
150 else
151 rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
152 }
153 else
154 {
155 rAlignment = LABEL_ALIGN_CENTER;
156 }
157
158 //add a scaling independent Offset if requested
159 if( nScreenValueOffsetInRadiusDirection != 0)
160 {
161 awt::Point aOrigin( transformSceneToScreenPosition(
162 m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) );
163 basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y );
164 aDirection.setLength(nScreenValueOffsetInRadiusDirection);
165 aRet.X += aDirection.getX();
166 aRet.Y += aDirection.getY();
167 }
168
169 return aRet;
170 }
171
172 } //namespace chart
173
174 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
175