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1 | 1 | /**************************************************************************** |
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2 | 2 | ** |
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3 | 3 | ** Copyright (C) 2012 Digia Plc |
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4 | 4 | ** All rights reserved. |
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5 | 5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
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6 | 6 | ** |
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7 | 7 | ** This file is part of the Qt Commercial Charts Add-on. |
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8 | 8 | ** |
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9 | 9 | ** $QT_BEGIN_LICENSE$ |
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10 | 10 | ** Licensees holding valid Qt Commercial licenses may use this file in |
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11 | 11 | ** accordance with the Qt Commercial License Agreement provided with the |
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12 | 12 | ** Software or, alternatively, in accordance with the terms contained in |
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13 | 13 | ** a written agreement between you and Digia. |
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14 | 14 | ** |
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15 | 15 | ** If you have questions regarding the use of this file, please use |
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16 | 16 | ** contact form at http://qt.digia.com |
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17 | 17 | ** $QT_END_LICENSE$ |
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18 | 18 | ** |
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19 | 19 | ****************************************************************************/ |
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20 | 20 | |
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21 | 21 | #include "domain_p.h" |
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22 | 22 | #include <cmath> |
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23 | 23 | |
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24 | 24 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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25 | 25 | |
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26 | Domain::Domain(QObject* parent):QObject(parent), | |
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27 | m_minX(0), | |
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28 |
m_maxX( |
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29 | m_minY(0), | |
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30 |
m_maxY( |
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31 | m_tickXCount(5), | |
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32 | m_tickYCount(5), | |
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33 | m_niceXNumbers(false), | |
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34 | m_niceYNumbers(false) | |
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26 | Domain::Domain(QObject* parent) : QObject(parent), | |
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27 | m_minX(0), | |
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28 | m_maxX(0), | |
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29 | m_minY(0), | |
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30 | m_maxY(0), | |
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31 | m_tickXCount(5), | |
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32 | m_tickYCount(5), | |
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33 | m_niceXNumbers(false), | |
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34 | m_niceYNumbers(false) | |
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35 | 35 | { |
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36 | 36 | } |
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37 | 37 | |
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38 | 38 | Domain::~Domain() |
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39 | 39 | { |
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40 | 40 | } |
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41 | 41 | |
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42 | 42 | void Domain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY) |
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43 | 43 | { |
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44 | 44 | setRange(minX, maxX, minY, maxY,m_tickXCount,m_tickYCount); |
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45 | 45 | } |
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46 | 46 | |
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47 | 47 | void Domain::setRange(qreal minX, qreal maxX, qreal minY, qreal maxY,int tickXCount,int tickYCount) |
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48 | 48 | { |
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49 | 49 | bool axisXChanged = false; |
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50 | 50 | bool axisYChanged = false; |
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51 | 51 | |
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52 | 52 | if(m_tickXCount!=tickXCount) { |
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53 | 53 | m_tickXCount=tickXCount; |
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54 | 54 | axisXChanged=true; |
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55 | 55 | } |
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56 | 56 | |
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57 | 57 | if(m_tickYCount!=tickYCount) { |
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58 | 58 | m_tickYCount=tickYCount; |
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59 | 59 | axisYChanged=true; |
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60 | 60 | } |
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61 | 61 | |
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62 | 62 | if (!qFuzzyIsNull(m_minX - minX) || !qFuzzyIsNull(m_maxX - maxX)) { |
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63 | 63 | if(m_niceXNumbers) looseNiceNumbers(minX, maxX, m_tickXCount); |
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64 | 64 | m_minX=minX; |
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65 | 65 | m_maxX=maxX; |
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66 | 66 | axisXChanged=true; |
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67 | 67 | } |
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68 | 68 | |
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69 | 69 | if (!qFuzzyIsNull(m_minY - minY) || !qFuzzyIsNull(m_maxY - maxY)) { |
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70 | 70 | if(m_niceYNumbers) looseNiceNumbers(minY, maxY, m_tickYCount); |
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71 | 71 | m_minY=minY; |
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72 | 72 | m_maxY=maxY; |
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73 | 73 | axisYChanged=true; |
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74 | 74 | } |
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75 | 75 | |
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76 | 76 | if(axisXChanged || axisYChanged) { |
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77 | 77 | emit this->domainChanged(m_minX, m_maxX, m_minY, m_maxY); |
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78 | 78 | } |
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79 | 79 | |
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80 | 80 | if(axisXChanged) { |
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81 | 81 | emit rangeXChanged(minX,maxX, m_tickXCount); |
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82 | 82 | } |
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83 | 83 | |
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84 | 84 | if(axisYChanged) { |
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85 | 85 | emit rangeYChanged(minY,maxY, m_tickYCount); |
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86 | 86 | } |
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87 | 87 | } |
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88 | 88 | |
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89 | 89 | void Domain::setRangeX(qreal min, qreal max) |
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90 | 90 | { |
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91 | 91 | setRange(min,max,m_minY, m_maxY); |
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92 | 92 | } |
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93 | 93 | |
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94 | 94 | void Domain::setRangeX(qreal min, qreal max, int tickCount) |
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95 | 95 | { |
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96 | 96 | setRange(min,max,m_minY, m_maxY,tickCount,m_tickYCount); |
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97 | 97 | } |
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98 | 98 | |
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99 | 99 | void Domain::setRangeY(qreal min, qreal max) |
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100 | 100 | { |
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101 | 101 | setRange(m_minX, m_maxX, min, max); |
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102 | 102 | } |
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103 | 103 | |
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104 | 104 | void Domain::setRangeY(qreal min, qreal max,int tickCount) |
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105 | 105 | { |
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106 | 106 | setRange(m_minX, m_maxX, min, max,m_tickXCount,tickCount); |
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107 | 107 | } |
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108 | 108 | |
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109 | 109 | void Domain::setMinX(qreal min) |
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110 | 110 | { |
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111 | 111 | setRange(min, m_maxX, m_minY, m_maxY); |
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112 | 112 | } |
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113 | 113 | |
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114 | 114 | void Domain::setMaxX(qreal max) |
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115 | 115 | { |
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116 | 116 | setRange(m_minX, max, m_minY, m_maxY); |
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117 | 117 | } |
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118 | 118 | |
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119 | 119 | void Domain::setMinY(qreal min) |
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120 | 120 | { |
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121 | 121 | setRange(m_minX, m_maxX, min, m_maxY); |
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122 | 122 | } |
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123 | 123 | |
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124 | 124 | void Domain::setMaxY(qreal max) |
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125 | 125 | { |
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126 | 126 | setRange(m_minX, m_maxX, m_minY, max); |
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127 | 127 | } |
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128 | 128 | |
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129 | 129 | qreal Domain::spanX() const |
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130 | 130 | { |
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131 | 131 | Q_ASSERT(m_maxX >= m_minX); |
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132 | 132 | return m_maxX - m_minX; |
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133 | 133 | } |
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134 | 134 | |
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135 | 135 | qreal Domain::spanY() const |
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136 | 136 | { |
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137 | 137 | Q_ASSERT(m_maxY >= m_minY); |
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138 | 138 | return m_maxY - m_minY; |
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139 | 139 | } |
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140 | 140 | |
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141 | 141 | bool Domain::isEmpty() const |
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142 | 142 | { |
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143 | 143 | return qFuzzyIsNull(spanX()) || qFuzzyIsNull(spanY()); |
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144 | 144 | } |
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145 | 145 | |
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146 | 146 | void Domain::zoomIn(const QRectF& rect, const QSizeF& size) |
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147 | 147 | { |
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148 | 148 | qreal dx = spanX() / size.width(); |
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149 | 149 | qreal dy = spanY() / size.height(); |
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150 | 150 | |
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151 | 151 | qreal maxX = m_maxX; |
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152 | 152 | qreal minX = m_minX; |
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153 | 153 | qreal minY = m_minY; |
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154 | 154 | qreal maxY = m_maxY; |
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155 | 155 | |
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156 | 156 | maxX = minX + dx * rect.right(); |
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157 | 157 | minX = minX + dx * rect.left(); |
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158 | 158 | minY = maxY - dy * rect.bottom(); |
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159 | 159 | maxY = maxY - dy * rect.top(); |
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160 | 160 | |
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161 | 161 | int tickXCount = m_tickXCount; |
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162 | 162 | int tickYCount = m_tickYCount; |
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163 | 163 | |
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164 | 164 | if(m_niceXNumbers) { |
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165 | 165 | looseNiceNumbers(minX, maxX, tickXCount); |
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166 | 166 | } |
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167 | 167 | if(m_niceYNumbers) { |
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168 | 168 | looseNiceNumbers(minY, maxY, tickYCount); |
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169 | 169 | } |
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170 | 170 | setRange(minX,maxX,minY,maxY,tickXCount,tickYCount); |
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171 | 171 | } |
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172 | 172 | |
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173 | 173 | void Domain::zoomOut(const QRectF& rect, const QSizeF& size) |
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174 | 174 | { |
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175 | 175 | qreal dx = spanX() / rect.width(); |
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176 | 176 | qreal dy = spanY() / rect.height(); |
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177 | 177 | |
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178 | 178 | qreal maxX = m_maxX; |
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179 | 179 | qreal minX = m_minX; |
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180 | 180 | qreal minY = m_minY; |
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181 | 181 | qreal maxY = m_maxY; |
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182 | 182 | |
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183 | 183 | minX = maxX - dx * rect.right(); |
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184 | 184 | maxX = minX + dx * size.width(); |
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185 | 185 | maxY = minY + dy * rect.bottom(); |
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186 | 186 | minY = maxY - dy * size.height(); |
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187 | 187 | |
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188 | 188 | int tickXCount = m_tickXCount; |
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189 | 189 | int tickYCount = m_tickYCount; |
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190 | 190 | |
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191 | 191 | if(m_niceXNumbers) { |
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192 | 192 | looseNiceNumbers(minX, maxX, tickXCount); |
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193 | 193 | } |
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194 | 194 | if(m_niceYNumbers) { |
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195 | 195 | looseNiceNumbers(minY, maxY, tickYCount); |
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196 | 196 | } |
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197 | 197 | setRange(minX,maxX,minY,maxY,tickXCount,tickYCount); |
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198 | 198 | } |
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199 | 199 | |
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200 | 200 | void Domain::move(int dx,int dy,const QSizeF& size) |
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201 | 201 | { |
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202 | 202 | qreal x = spanX() / size.width(); |
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203 | 203 | qreal y = spanY() / size.height(); |
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204 | 204 | |
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205 | 205 | qreal maxX = m_maxX; |
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206 | 206 | qreal minX = m_minX; |
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207 | 207 | qreal minY = m_minY; |
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208 | 208 | qreal maxY = m_maxY; |
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209 | 209 | |
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210 | 210 | if(dx!=0) { |
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211 | 211 | minX = minX + x * dx; |
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212 | 212 | maxX = maxX + x * dx; |
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213 | 213 | } |
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214 | 214 | if(dy!=0) { |
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215 | 215 | minY = minY + y * dy; |
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216 | 216 | maxY = maxY + y * dy; |
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217 | 217 | } |
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218 | 218 | setRange(minX,maxX,minY,maxY); |
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219 | 219 | } |
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220 | 220 | |
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221 | 221 | void Domain::handleAxisXChanged(qreal min,qreal max,int tickXCount,bool niceNumbers) |
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222 | 222 | { |
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223 | 223 | if (m_niceXNumbers != niceNumbers) { |
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224 | 224 | m_niceXNumbers = niceNumbers; |
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225 | 225 | //force recalculation |
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226 | 226 | m_minX = 0; |
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227 | 227 | m_maxX = 0; |
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228 | 228 | } |
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229 | 229 | setRange(min,max,m_minY, m_maxY,tickXCount,m_tickYCount); |
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230 | 230 | } |
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231 | 231 | |
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232 | 232 | void Domain::handleAxisYChanged(qreal min,qreal max,int tickYCount,bool niceNumbers) |
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233 | 233 | { |
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234 | 234 | if (m_niceYNumbers != niceNumbers) { |
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235 | 235 | m_niceYNumbers = niceNumbers; |
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236 | 236 | //force recalculation |
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237 | 237 | m_minY = 0; |
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238 | 238 | m_maxY = 0; |
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239 | 239 | } |
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240 | 240 | setRange(m_minX, m_maxX, min, max,m_tickXCount,tickYCount); |
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241 | 241 | } |
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242 | 242 | |
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243 | 243 | //algorithm defined by Paul S.Heckbert GraphicalGems I |
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244 | 244 | |
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245 | 245 | void Domain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount) const |
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246 | 246 | { |
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247 | 247 | qreal range = niceNumber(max-min,true); //range with ceiling |
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248 | 248 | qreal step = niceNumber(range/(ticksCount-1),false); |
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249 | 249 | min = floor(min/step); |
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250 | 250 | max = ceil(max/step); |
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251 | 251 | ticksCount = int(max-min) +1; |
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252 | 252 | min*=step; |
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253 | 253 | max*=step; |
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254 | 254 | } |
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255 | 255 | |
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256 | 256 | //nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n |
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257 | 257 | |
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258 | 258 | qreal Domain::niceNumber(qreal x,bool ceiling) const |
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259 | 259 | { |
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260 | 260 | qreal z = pow(10,floor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x |
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261 | 261 | qreal q = x/z;//q<10 && q>=1; |
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262 | 262 | |
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263 | 263 | if(ceiling) { |
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264 | 264 | if(q <= 1.0) q=1; |
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265 | 265 | else if(q <= 2.0) q=2; |
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266 | 266 | else if(q <= 5.0) q=5; |
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267 | 267 | else q=10; |
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268 | 268 | } |
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269 | 269 | else { |
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270 | 270 | if(q < 1.5) q=1; |
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271 | 271 | else if(q < 3.0) q=2; |
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272 | 272 | else if(q < 7.0) q=5; |
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273 | 273 | else q=10; |
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274 | 274 | } |
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275 | 275 | return q*z; |
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276 | 276 | } |
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277 | 277 | |
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278 | 278 | |
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279 | 279 | bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator== (const Domain &domain1, const Domain &domain2) |
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280 | 280 | { |
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281 | 281 | return (qFuzzyIsNull(domain1.m_maxX - domain2.m_maxX) && |
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282 | 282 | qFuzzyIsNull(domain1.m_maxY - domain2.m_maxY) && |
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283 | 283 | qFuzzyIsNull(domain1.m_minX - domain2.m_minX) && |
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284 | 284 | qFuzzyIsNull(domain1.m_minY - domain2.m_minY)); |
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285 | 285 | } |
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286 | 286 | |
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287 | 287 | |
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288 | 288 | bool QTCOMMERCIALCHART_AUTOTEST_EXPORT operator!= (const Domain &domain1, const Domain &domain2) |
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289 | 289 | { |
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290 | 290 | return !(domain1 == domain2); |
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291 | 291 | } |
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292 | 292 | |
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293 | 293 | |
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294 | 294 | QDebug QTCOMMERCIALCHART_AUTOTEST_EXPORT operator<<(QDebug dbg, const Domain &domain) |
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295 | 295 | { |
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296 | 296 | dbg.nospace() << "Domain("<<domain.m_minX<<','<<domain.m_maxX<<','<<domain.m_minY<<','<<domain.m_maxY<<')' << domain.m_tickXCount << "," << domain.m_tickYCount ; |
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297 | 297 | return dbg.maybeSpace(); |
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298 | 298 | } |
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299 | 299 | |
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300 | 300 | #include "moc_domain_p.cpp" |
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301 | 301 | |
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302 | 302 | QTCOMMERCIALCHART_END_NAMESPACE |
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