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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 :
21 : #include "PolarLabelPositionHelper.hxx"
22 : #include "PlottingPositionHelper.hxx"
23 : #include "CommonConverters.hxx"
24 : #include <basegfx/vector/b2dvector.hxx>
25 : #include <basegfx/vector/b2ivector.hxx>
26 :
27 : #include <com/sun/star/chart/DataLabelPlacement.hpp>
28 :
29 : //.............................................................................
30 : namespace chart
31 : {
32 : //.............................................................................
33 : using namespace ::com::sun::star;
34 : using namespace ::com::sun::star::chart2;
35 :
36 0 : PolarLabelPositionHelper::PolarLabelPositionHelper(
37 : PolarPlottingPositionHelper* pPosHelper
38 : , sal_Int32 nDimensionCount
39 : , const uno::Reference< drawing::XShapes >& xLogicTarget
40 : , ShapeFactory* pShapeFactory )
41 : : LabelPositionHelper( pPosHelper, nDimensionCount, xLogicTarget, pShapeFactory )
42 0 : , m_pPosHelper(pPosHelper)
43 : {
44 0 : }
45 :
46 0 : PolarLabelPositionHelper::~PolarLabelPositionHelper()
47 : {
48 0 : }
49 :
50 0 : awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues(
51 : LabelAlignment& rAlignment
52 : , double fLogicValueOnAngleAxis
53 : , double fLogicValueOnRadiusAxis
54 : , double fLogicZ
55 : , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
56 : {
57 0 : double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis );
58 0 : double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis );
59 :
60 : return getLabelScreenPositionAndAlignmentForUnitCircleValues(
61 : rAlignment, ::com::sun::star::chart::DataLabelPlacement::OUTSIDE
62 : , fUnitCircleAngleDegree, 0.0
63 0 : , fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection );
64 : }
65 :
66 0 : awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues(
67 : LabelAlignment& rAlignment, sal_Int32 nLabelPlacement
68 : , double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree
69 : , double fUnitCircleInnerRadius, double fUnitCircleOuterRadius
70 : , double fLogicZ
71 : , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
72 : {
73 : bool bCenter = (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
74 0 : && (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::INSIDE);
75 :
76 0 : double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0;
77 0 : double fRadius = 0.0;
78 0 : if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polyar coordinate system
79 0 : fRadius = fUnitCircleOuterRadius;
80 : else
81 0 : fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ;
82 :
83 : awt::Point aRet( this->transformSceneToScreenPosition(
84 0 : m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) );
85 :
86 0 : if(3==m_nDimensionCount && nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
87 : {
88 : //check whether the upper or the downer edge is more distant from the center
89 : //take the farest point to put the label to
90 :
91 : awt::Point aP0( this->transformSceneToScreenPosition(
92 0 : m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) );
93 0 : awt::Point aP1(aRet);
94 : awt::Point aP2( this->transformSceneToScreenPosition(
95 0 : m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) );
96 :
97 0 : ::basegfx::B2DVector aV0( aP0.X, aP0.Y );
98 0 : ::basegfx::B2DVector aV1( aP1.X, aP1.Y );
99 0 : ::basegfx::B2DVector aV2( aP2.X, aP2.Y );
100 :
101 0 : double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength();
102 0 : double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength();
103 :
104 0 : if(fL2>fL1)
105 0 : aRet = aP2;
106 :
107 : //calculate new angle for alignment
108 0 : double fDX = aRet.X-aP0.X;
109 0 : double fDY = aRet.Y-aP0.Y;
110 0 : fDY*=-1.0;//drawing layer has inverse y values
111 0 : if( fDX != 0.0 )
112 : {
113 0 : fAngleDegree = atan(fDY/fDX)*180.0/F_PI;
114 0 : if(fDX<0.0)
115 0 : fAngleDegree+=180.0;
116 : }
117 : else
118 : {
119 0 : if(fDY>0.0)
120 0 : fAngleDegree = 90.0;
121 : else
122 0 : fAngleDegree = 270.0;
123 0 : }
124 : }
125 : //------------------------------
126 : //set LabelAlignment
127 0 : if( !bCenter )
128 : {
129 0 : while(fAngleDegree>360.0)
130 0 : fAngleDegree-=360.0;
131 0 : while(fAngleDegree<0.0)
132 0 : fAngleDegree+=360.0;
133 :
134 0 : bool bOutside = nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE;
135 :
136 0 : if(fAngleDegree==0.0)
137 0 : rAlignment = LABEL_ALIGN_CENTER;
138 0 : else if(fAngleDegree<=22.5)
139 0 : rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
140 0 : else if(fAngleDegree<67.5)
141 0 : rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM;
142 0 : else if(fAngleDegree<112.5)
143 0 : rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM;
144 0 : else if(fAngleDegree<=157.5)
145 0 : rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM;
146 0 : else if(fAngleDegree<=202.5)
147 0 : rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT;
148 0 : else if(fAngleDegree<247.5)
149 0 : rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP;
150 0 : else if(fAngleDegree<292.5)
151 0 : rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP;
152 0 : else if(fAngleDegree<337.5)
153 0 : rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP;
154 : else
155 0 : rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
156 : }
157 : else
158 : {
159 0 : rAlignment = LABEL_ALIGN_CENTER;
160 : }
161 :
162 : //add a scaling independent Offset if requested
163 0 : if( nScreenValueOffsetInRadiusDirection != 0)
164 : {
165 : awt::Point aOrigin( this->transformSceneToScreenPosition(
166 0 : m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) );
167 0 : basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y );
168 0 : aDirection.setLength(nScreenValueOffsetInRadiusDirection);
169 0 : aRet.X += aDirection.getX();
170 0 : aRet.Y += aDirection.getY();
171 : }
172 :
173 0 : return aRet;
174 : }
175 :
176 : //.............................................................................
177 : } //namespace chart
178 : //.............................................................................
179 :
180 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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