@@ -1,476 +1,486 | |||
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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 "chartaxis_p.h" |
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22 | 22 | #include "qabstractaxis.h" |
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23 | 23 | #include "qabstractaxis_p.h" |
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24 | 24 | #include "chartpresenter_p.h" |
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25 | 25 | #include "chartlayout_p.h" |
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26 | 26 | #include "domain_p.h" |
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27 | 27 | #include <qmath.h> |
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28 | 28 | #include <QDateTime> |
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29 | 29 | #include <QValueAxis> |
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30 | 30 | #include <QGraphicsLayout> |
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31 | 31 | #include <QFontMetrics> |
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32 | 32 | |
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33 | 33 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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34 | 34 | |
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35 | 35 | ChartAxis::ChartAxis(QAbstractAxis *axis, ChartPresenter *presenter, bool intervalAxis) |
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36 | 36 | : ChartElement(presenter), |
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37 | 37 | m_chartAxis(axis), |
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38 | 38 | m_labelsAngle(0), |
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39 | 39 | m_grid(new QGraphicsItemGroup(presenter->rootItem())), |
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40 | 40 | m_shades(new QGraphicsItemGroup(presenter->rootItem())), |
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41 | 41 | m_labels(new QGraphicsItemGroup(presenter->rootItem())), |
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42 | 42 | m_arrow(new QGraphicsItemGroup(presenter->rootItem())), |
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43 | 43 | m_title(new QGraphicsSimpleTextItem(presenter->rootItem())), |
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44 | 44 | m_min(0), |
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45 | 45 | m_max(0), |
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46 | 46 | m_animation(0), |
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47 | 47 | m_labelPadding(5), |
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48 | 48 | m_intervalAxis(intervalAxis) |
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49 | 49 | { |
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50 | 50 | //initial initialization |
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51 | 51 | m_arrow->setZValue(ChartPresenter::AxisZValue); |
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52 | 52 | m_arrow->setHandlesChildEvents(false); |
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53 | 53 | m_labels->setZValue(ChartPresenter::AxisZValue); |
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54 | 54 | m_shades->setZValue(ChartPresenter::ShadesZValue); |
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55 | 55 | m_grid->setZValue(ChartPresenter::GridZValue); |
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56 | 56 | m_title->setZValue(ChartPresenter::GridZValue); |
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57 | 57 | |
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58 | 58 | QObject::connect(m_chartAxis->d_ptr.data(), SIGNAL(updated()), this, SLOT(handleAxisUpdated())); |
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59 | 59 | |
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60 | 60 | QGraphicsSimpleTextItem item; |
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61 | 61 | m_font = item.font(); |
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62 | 62 | |
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63 | 63 | } |
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64 | 64 | |
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65 | 65 | ChartAxis::~ChartAxis() |
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66 | 66 | { |
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67 | 67 | } |
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68 | 68 | |
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69 | 69 | void ChartAxis::setAnimation(AxisAnimation *animation) |
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70 | 70 | { |
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71 | 71 | m_animation = animation; |
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72 | 72 | } |
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73 | 73 | |
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74 | 74 | void ChartAxis::setLayout(QVector<qreal> &layout) |
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75 | 75 | { |
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76 | 76 | m_layoutVector = layout; |
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77 | 77 | } |
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78 | 78 | |
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79 | 79 | void ChartAxis::createItems(int count) |
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80 | 80 | { |
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81 | 81 | if (m_arrow->childItems().size() == 0) |
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82 | 82 | m_arrow->addToGroup(new AxisItem(this, presenter()->rootItem())); |
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83 | 83 | |
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84 | 84 | if (m_intervalAxis && m_grid->childItems().size() == 0) { |
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85 | 85 | for (int i = 0 ; i < 2 ; i ++) |
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86 | 86 | m_grid->addToGroup(new QGraphicsLineItem(presenter()->rootItem())); |
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87 | 87 | } |
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88 | 88 | |
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89 | 89 | for (int i = 0; i < count; ++i) { |
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90 | 90 | m_grid->addToGroup(new QGraphicsLineItem(presenter()->rootItem())); |
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91 | 91 | QGraphicsSimpleTextItem *label = new QGraphicsSimpleTextItem(presenter()->rootItem()); |
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92 | 92 | label->setFont(m_font); |
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93 | 93 | m_labels->addToGroup(label); |
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94 | 94 | m_arrow->addToGroup(new QGraphicsLineItem(presenter()->rootItem())); |
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95 | 95 | if ((m_grid->childItems().size()) % 2 && m_grid->childItems().size() > 2) |
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96 | 96 | m_shades->addToGroup(new QGraphicsRectItem(presenter()->rootItem())); |
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97 | 97 | } |
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98 | 98 | } |
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99 | 99 | |
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100 | 100 | void ChartAxis::deleteItems(int count) |
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101 | 101 | { |
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102 | 102 | QList<QGraphicsItem *> lines = m_grid->childItems(); |
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103 | 103 | QList<QGraphicsItem *> labels = m_labels->childItems(); |
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104 | 104 | QList<QGraphicsItem *> shades = m_shades->childItems(); |
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105 | 105 | QList<QGraphicsItem *> axis = m_arrow->childItems(); |
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106 | 106 | |
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107 | 107 | for (int i = 0; i < count; ++i) { |
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108 | 108 | if (lines.size() % 2 && lines.size() > 1) |
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109 | 109 | delete(shades.takeLast()); |
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110 | 110 | delete(lines.takeLast()); |
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111 | 111 | delete(labels.takeLast()); |
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112 | 112 | delete(axis.takeLast()); |
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113 | 113 | } |
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114 | 114 | } |
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115 | 115 | |
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116 | 116 | void ChartAxis::updateLayout(QVector<qreal> &layout) |
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117 | 117 | { |
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118 | 118 | int diff = m_layoutVector.size() - layout.size(); |
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119 | 119 | |
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120 | 120 | if (diff > 0) |
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121 | 121 | deleteItems(diff); |
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122 | 122 | else if (diff < 0) |
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123 | 123 | createItems(-diff); |
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124 | 124 | |
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125 | 125 | if (diff < 0) handleAxisUpdated(); |
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126 | 126 | |
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127 | 127 | if (m_animation) { |
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128 | 128 | switch (presenter()->state()) { |
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129 | 129 | case ChartPresenter::ZoomInState: |
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130 | 130 | m_animation->setAnimationType(AxisAnimation::ZoomInAnimation); |
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131 | 131 | m_animation->setAnimationPoint(presenter()->statePoint()); |
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132 | 132 | break; |
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133 | 133 | case ChartPresenter::ZoomOutState: |
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134 | 134 | m_animation->setAnimationType(AxisAnimation::ZoomOutAnimation); |
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135 | 135 | m_animation->setAnimationPoint(presenter()->statePoint()); |
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136 | 136 | break; |
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137 | 137 | case ChartPresenter::ScrollUpState: |
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138 | 138 | case ChartPresenter::ScrollLeftState: |
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139 | 139 | m_animation->setAnimationType(AxisAnimation::MoveBackwordAnimation); |
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140 | 140 | break; |
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141 | 141 | case ChartPresenter::ScrollDownState: |
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142 | 142 | case ChartPresenter::ScrollRightState: |
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143 | 143 | m_animation->setAnimationType(AxisAnimation::MoveForwardAnimation); |
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144 | 144 | break; |
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145 | 145 | case ChartPresenter::ShowState: |
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146 | 146 | m_animation->setAnimationType(AxisAnimation::DefaultAnimation); |
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147 | 147 | break; |
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148 | 148 | } |
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149 | 149 | m_animation->setValues(m_layoutVector, layout); |
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150 | 150 | presenter()->startAnimation(m_animation); |
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151 | 151 | } else { |
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152 | 152 | setLayout(layout); |
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153 | 153 | updateGeometry(); |
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154 | 154 | } |
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155 | 155 | } |
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156 | 156 | |
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157 | 157 | void ChartAxis::setArrowOpacity(qreal opacity) |
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158 | 158 | { |
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159 | 159 | m_arrow->setOpacity(opacity); |
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160 | 160 | } |
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161 | 161 | |
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162 | 162 | qreal ChartAxis::arrowOpacity() const |
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163 | 163 | { |
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164 | 164 | return m_arrow->opacity(); |
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165 | 165 | } |
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166 | 166 | |
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167 | 167 | void ChartAxis::setArrowVisibility(bool visible) |
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168 | 168 | { |
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169 | 169 | m_arrow->setOpacity(visible); |
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170 | 170 | } |
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171 | 171 | |
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172 | 172 | void ChartAxis::setGridOpacity(qreal opacity) |
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173 | 173 | { |
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174 | 174 | m_grid->setOpacity(opacity); |
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175 | 175 | } |
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176 | 176 | |
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177 | 177 | qreal ChartAxis::gridOpacity() const |
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178 | 178 | { |
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179 | 179 | return m_grid->opacity(); |
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180 | 180 | } |
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181 | 181 | |
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182 | 182 | void ChartAxis::setGridVisibility(bool visible) |
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183 | 183 | { |
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184 | 184 | m_grid->setOpacity(visible); |
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185 | 185 | } |
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186 | 186 | |
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187 | 187 | void ChartAxis::setLabelsOpacity(qreal opacity) |
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188 | 188 | { |
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189 | 189 | m_labels->setOpacity(opacity); |
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190 | 190 | } |
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191 | 191 | |
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192 | 192 | qreal ChartAxis::labelsOpacity() const |
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193 | 193 | { |
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194 | 194 | return m_labels->opacity(); |
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195 | 195 | } |
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196 | 196 | |
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197 | 197 | void ChartAxis::setLabelsVisibility(bool visible) |
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198 | 198 | { |
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199 | 199 | m_labels->setOpacity(visible); |
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200 | 200 | } |
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201 | 201 | |
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202 | 202 | void ChartAxis::setShadesOpacity(qreal opacity) |
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203 | 203 | { |
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204 | 204 | m_shades->setOpacity(opacity); |
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205 | 205 | } |
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206 | 206 | |
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207 | 207 | qreal ChartAxis::shadesOpacity() const |
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208 | 208 | { |
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209 | 209 | return m_shades->opacity(); |
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210 | 210 | } |
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211 | 211 | |
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212 | 212 | void ChartAxis::setShadesVisibility(bool visible) |
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213 | 213 | { |
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214 | 214 | m_shades->setVisible(visible); |
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215 | 215 | } |
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216 | 216 | |
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217 | 217 | void ChartAxis::setLabelsAngle(int angle) |
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218 | 218 | { |
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219 | 219 | foreach (QGraphicsItem *item, m_labels->childItems()) |
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220 | 220 | item->setRotation(angle); |
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221 | 221 | |
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222 | 222 | m_labelsAngle = angle; |
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223 | 223 | } |
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224 | 224 | |
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225 | 225 | void ChartAxis::setLabelsPen(const QPen &pen) |
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226 | 226 | { |
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227 | 227 | foreach (QGraphicsItem *item , m_labels->childItems()) |
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228 | 228 | static_cast<QGraphicsSimpleTextItem *>(item)->setPen(pen); |
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229 | 229 | } |
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230 | 230 | |
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231 | 231 | void ChartAxis::setLabelsBrush(const QBrush &brush) |
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232 | 232 | { |
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233 | 233 | foreach (QGraphicsItem *item , m_labels->childItems()) |
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234 | 234 | static_cast<QGraphicsSimpleTextItem *>(item)->setBrush(brush); |
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235 | 235 | } |
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236 | 236 | |
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237 | 237 | void ChartAxis::setLabelsFont(const QFont &font) |
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238 | 238 | { |
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239 | 239 | if (m_font != font) { |
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240 | 240 | m_font = font; |
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241 | 241 | foreach (QGraphicsItem *item , m_labels->childItems()) |
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242 | 242 | static_cast<QGraphicsSimpleTextItem *>(item)->setFont(font); |
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243 | 243 | QGraphicsLayoutItem::updateGeometry(); |
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244 | 244 | presenter()->layout()->invalidate(); |
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245 | 245 | } |
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246 | 246 | } |
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247 | 247 | |
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248 | 248 | void ChartAxis::setShadesBrush(const QBrush &brush) |
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249 | 249 | { |
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250 | 250 | foreach (QGraphicsItem *item , m_shades->childItems()) |
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251 | 251 | static_cast<QGraphicsRectItem *>(item)->setBrush(brush); |
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252 | 252 | } |
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253 | 253 | |
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254 | 254 | void ChartAxis::setShadesPen(const QPen &pen) |
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255 | 255 | { |
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256 | 256 | foreach (QGraphicsItem *item , m_shades->childItems()) |
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257 | 257 | static_cast<QGraphicsRectItem *>(item)->setPen(pen); |
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258 | 258 | } |
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259 | 259 | |
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260 | 260 | void ChartAxis::setArrowPen(const QPen &pen) |
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261 | 261 | { |
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262 | 262 | foreach (QGraphicsItem *item , m_arrow->childItems()) |
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263 | 263 | static_cast<QGraphicsLineItem *>(item)->setPen(pen); |
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264 | 264 | } |
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265 | 265 | |
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266 | 266 | void ChartAxis::setGridPen(const QPen &pen) |
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267 | 267 | { |
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268 | 268 | foreach (QGraphicsItem *item , m_grid->childItems()) |
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269 | 269 | static_cast<QGraphicsLineItem *>(item)->setPen(pen); |
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270 | 270 | } |
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271 | 271 | |
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272 | 272 | void ChartAxis::setLabelPadding(int padding) |
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273 | 273 | { |
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274 | 274 | m_labelPadding = padding; |
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275 | 275 | } |
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276 | 276 | |
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277 | 277 | bool ChartAxis::isEmpty() |
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278 | 278 | { |
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279 | 279 | return m_axisRect.isEmpty() || m_gridRect.isEmpty() || qFuzzyCompare(m_min, m_max); |
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280 | 280 | } |
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281 | 281 | |
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282 | 282 | void ChartAxis::handleDomainUpdated() |
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283 | 283 | { |
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284 | 284 | Domain *domain = qobject_cast<Domain *>(sender()); |
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285 | 285 | qreal min(0); |
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286 | 286 | qreal max(0); |
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287 | 287 | |
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288 | 288 | if (m_chartAxis->orientation() == Qt::Horizontal) { |
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289 | 289 | min = domain->minX(); |
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290 | 290 | max = domain->maxX(); |
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291 | 291 | } else if (m_chartAxis->orientation() == Qt::Vertical) { |
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292 | 292 | min = domain->minY(); |
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293 | 293 | max = domain->maxY(); |
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294 | 294 | } |
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295 | 295 | |
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296 | 296 | if (!qFuzzyCompare(m_min, min) || !qFuzzyCompare(m_max, max)) { |
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297 | 297 | m_min = min; |
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298 | 298 | m_max = max; |
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299 | 299 | |
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300 | 300 | if (!isEmpty()) { |
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301 | 301 | |
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302 | 302 | QVector<qreal> layout = calculateLayout(); |
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303 | 303 | updateLayout(layout); |
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304 | 304 | QSizeF before = effectiveSizeHint(Qt::PreferredSize); |
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305 | 305 | QSizeF after = sizeHint(Qt::PreferredSize); |
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306 | 306 | |
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307 | 307 | if (before != after) { |
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308 | 308 | QGraphicsLayoutItem::updateGeometry(); |
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309 | 309 | //we don't want to call invalidate on layout, since it will change minimum size of component, |
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310 | 310 | //which we would like to avoid since it causes nasty flips when scrolling or zooming, |
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311 | 311 | //instead recalculate layout and use plotArea for extra space. |
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312 | 312 | presenter()->layout()->setGeometry(presenter()->layout()->geometry()); |
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313 | 313 | } |
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314 | 314 | } |
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315 | 315 | } |
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316 | 316 | } |
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317 | 317 | |
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318 | 318 | void ChartAxis::handleAxisUpdated() |
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319 | 319 | { |
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320 | 320 | if (isEmpty()) |
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321 | 321 | return; |
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322 | 322 | |
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323 | 323 | bool visible = m_chartAxis->isVisible(); |
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324 | 324 | |
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325 | 325 | //TODO: split this into separate signal/slots ? |
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326 | 326 | setArrowVisibility(visible && m_chartAxis->isLineVisible()); |
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327 | 327 | setGridVisibility(visible && m_chartAxis->isGridLineVisible()); |
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328 | 328 | setLabelsVisibility(visible && m_chartAxis->labelsVisible()); |
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329 | 329 | setShadesVisibility(visible && m_chartAxis->shadesVisible()); |
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330 | 330 | setLabelsAngle(m_chartAxis->labelsAngle()); |
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331 | 331 | setArrowPen(m_chartAxis->linePen()); |
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332 | 332 | setLabelsPen(m_chartAxis->labelsPen()); |
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333 | 333 | setLabelsBrush(m_chartAxis->labelsBrush()); |
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334 | 334 | setLabelsFont(m_chartAxis->labelsFont()); |
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335 | 335 | setGridPen(m_chartAxis->gridLinePen()); |
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336 | 336 | setShadesPen(m_chartAxis->shadesPen()); |
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337 | 337 | setShadesBrush(m_chartAxis->shadesBrush()); |
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338 | 338 | setTitleText(m_chartAxis->title()); |
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339 | 339 | setTitleFont(m_chartAxis->titleFont()); |
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340 | 340 | setTitlePen(m_chartAxis->titlePen()); |
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341 | 341 | setTitleBrush(m_chartAxis->titleBrush()); |
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342 | 342 | } |
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343 | 343 | |
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344 | 344 | void ChartAxis::setTitleText(const QString &title) |
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345 | 345 | { |
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346 | 346 | if (m_titleText != title) { |
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347 | 347 | m_titleText = title; |
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348 | 348 | QGraphicsLayoutItem::updateGeometry(); |
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349 | 349 | presenter()->layout()->invalidate(); |
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350 | 350 | } |
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351 | 351 | } |
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352 | 352 | |
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353 | 353 | void ChartAxis::setTitlePen(const QPen &pen) |
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354 | 354 | { |
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355 | 355 | m_title->setPen(pen); |
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356 | 356 | } |
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357 | 357 | |
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358 | 358 | void ChartAxis::setTitleBrush(const QBrush &brush) |
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359 | 359 | { |
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360 | 360 | m_title->setBrush(brush); |
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361 | 361 | } |
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362 | 362 | |
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363 | 363 | void ChartAxis::setTitleFont(const QFont &font) |
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364 | 364 | { |
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365 | 365 | if(m_title->font() != font){ |
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366 | 366 | m_title->setFont(font); |
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367 | 367 | QGraphicsLayoutItem::updateGeometry(); |
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368 | 368 | presenter()->layout()->invalidate(); |
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369 | 369 | } |
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370 | 370 | } |
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371 | 371 | |
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372 | 372 | QFont ChartAxis::titleFont() const |
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373 | 373 | { |
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374 | 374 | return m_title->font(); |
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375 | 375 | } |
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376 | 376 | |
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377 | 377 | void ChartAxis::hide() |
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378 | 378 | { |
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379 | 379 | setArrowVisibility(false); |
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380 | 380 | setGridVisibility(false); |
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381 | 381 | setLabelsVisibility(false); |
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382 | 382 | setShadesVisibility(false); |
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383 | 383 | } |
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384 | 384 | |
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385 | 385 | void ChartAxis::setGeometry(const QRectF &axis, const QRectF &grid) |
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386 | 386 | { |
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387 | 387 | m_gridRect = grid; |
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388 | 388 | m_axisRect = axis; |
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389 | 389 | |
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390 | 390 | if (isEmpty()) |
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391 | 391 | return; |
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392 | 392 | |
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393 | 393 | QVector<qreal> layout = calculateLayout(); |
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394 | 394 | updateLayout(layout); |
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395 | 395 | |
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396 | 396 | } |
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397 | 397 | |
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398 | 398 | void ChartAxis::axisSelected() |
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399 | 399 | { |
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400 | 400 | //TODO: axis clicked; |
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401 | 401 | } |
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402 | 402 | |
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403 | 403 | Qt::Orientation ChartAxis::orientation() const |
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404 | 404 | { |
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405 | 405 | return m_chartAxis->orientation(); |
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406 | 406 | } |
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407 | 407 | |
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408 | 408 | Qt::Alignment ChartAxis::alignment() const |
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409 | 409 | { |
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410 | 410 | return m_chartAxis->alignment(); |
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411 | 411 | } |
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412 | 412 | |
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413 | 413 | bool ChartAxis::isVisible() |
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414 | 414 | { |
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415 | 415 | return m_chartAxis->isVisible(); |
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416 | 416 | } |
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417 | 417 | |
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418 | 418 | void ChartAxis::setLabels(const QStringList &labels) |
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419 | 419 | { |
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420 | 420 | m_labelsList = labels; |
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421 | 421 | } |
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422 | 422 | |
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423 | 423 | QStringList ChartAxis::createValueLabels(int ticks) const |
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424 | 424 | { |
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425 | 425 | Q_ASSERT(m_max > m_min); |
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426 | 426 | Q_ASSERT(ticks > 1); |
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427 | 427 | |
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428 | 428 | QStringList labels; |
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429 | 429 | |
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430 | 430 | int n = qMax(int(-qFloor(log10((m_max - m_min) / (ticks - 1)))), 0); |
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431 | 431 | n++; |
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432 | 432 | |
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433 | 433 | QValueAxis *axis = qobject_cast<QValueAxis *>(m_chartAxis); |
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434 | 434 | |
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435 | 435 | QString format = axis->labelFormat(); |
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436 | 436 | |
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437 | 437 | if (format.isNull()) { |
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438 | 438 | for (int i = 0; i < ticks; i++) { |
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439 | 439 | qreal value = m_min + (i * (m_max - m_min) / (ticks - 1)); |
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440 | 440 | labels << QString::number(value, 'f', n); |
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441 | 441 | } |
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442 | 442 | } else { |
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443 | 443 | QByteArray array = format.toLatin1(); |
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444 | 444 | for (int i = 0; i < ticks; i++) { |
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445 | 445 | qreal value = m_min + (i * (m_max - m_min) / (ticks - 1)); |
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446 | if (format.contains("d") | |
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447 | || format.contains("i") | |
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448 | || format.contains("c")) | |
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449 | ||
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450 | labels << QString().sprintf(array, (qint64)value); | |
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451 | else if (format.contains("u") | |
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452 | || format.contains("o") | |
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453 | || format.contains("x", Qt::CaseInsensitive)) | |
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454 | labels << QString().sprintf(array, (quint64)value); | |
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455 | else | |
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446 | 456 | labels << QString().sprintf(array, value); |
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447 | 457 | } |
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448 | 458 | } |
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449 | 459 | |
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450 | 460 | return labels; |
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451 | 461 | } |
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452 | 462 | |
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453 | 463 | QStringList ChartAxis::createDateTimeLabels(const QString &format, int ticks) const |
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454 | 464 | { |
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455 | 465 | Q_ASSERT(m_max > m_min); |
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456 | 466 | Q_ASSERT(ticks > 1); |
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457 | 467 | QStringList labels; |
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458 | 468 | int n = qMax(int(-floor(log10((m_max - m_min) / (ticks - 1)))), 0); |
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459 | 469 | n++; |
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460 | 470 | for (int i = 0; i < ticks; i++) { |
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461 | 471 | qreal value = m_min + (i * (m_max - m_min) / (ticks - 1)); |
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462 | 472 | labels << QDateTime::fromMSecsSinceEpoch(value).toString(format); |
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463 | 473 | } |
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464 | 474 | return labels; |
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465 | 475 | } |
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466 | 476 | |
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467 | 477 | QSizeF ChartAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
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468 | 478 | { |
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469 | 479 | Q_UNUSED(which); |
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470 | 480 | Q_UNUSED(constraint); |
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471 | 481 | return QSizeF(); |
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472 | 482 | } |
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473 | 483 | |
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474 | 484 | #include "moc_chartaxis_p.cpp" |
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475 | 485 | |
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476 | 486 | QTCOMMERCIALCHART_END_NAMESPACE |
@@ -1,420 +1,422 | |||
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1 | 1 | /**************************************************************************** |
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2 | 2 | ** |
|
3 | 3 | ** Copyright (C) 2012 Digia Plc |
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4 | 4 | ** All rights reserved. |
|
5 | 5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
|
6 | 6 | ** |
|
7 | 7 | ** This file is part of the Qt Commercial Charts Add-on. |
|
8 | 8 | ** |
|
9 | 9 | ** $QT_BEGIN_LICENSE$ |
|
10 | 10 | ** Licensees holding valid Qt Commercial licenses may use this file in |
|
11 | 11 | ** accordance with the Qt Commercial License Agreement provided with the |
|
12 | 12 | ** Software or, alternatively, in accordance with the terms contained in |
|
13 | 13 | ** a written agreement between you and Digia. |
|
14 | 14 | ** |
|
15 | 15 | ** If you have questions regarding the use of this file, please use |
|
16 | 16 | ** contact form at http://qt.digia.com |
|
17 | 17 | ** $QT_END_LICENSE$ |
|
18 | 18 | ** |
|
19 | 19 | ****************************************************************************/ |
|
20 | 20 | |
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21 | 21 | #include "qvalueaxis.h" |
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22 | 22 | #include "qvalueaxis_p.h" |
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23 | 23 | #include "chartvalueaxisx_p.h" |
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24 | 24 | #include "chartvalueaxisy_p.h" |
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25 | 25 | #include "domain_p.h" |
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26 | 26 | #include "chartdataset_p.h" |
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27 | 27 | #include <qmath.h> |
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28 | 28 | |
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29 | 29 | |
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30 | 30 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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31 | 31 | /*! |
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32 | 32 | \class QValueAxis |
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33 | 33 | \brief The QValueAxis class is used for manipulating chart's axis. |
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34 | 34 | \mainclass |
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35 | 35 | |
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36 | 36 | ValueAxis can be setup to show axis line with tick marks, grid lines and shades. |
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37 | 37 | Values of axis are drawn to position of ticks. |
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38 | 38 | |
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39 | 39 | Example code on how to use QValueAxis. |
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40 | 40 | \code |
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41 | 41 | QChartView *chartView = new QChartView; |
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42 | 42 | QLineSeries *series = new QLineSeries; |
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43 | 43 | // ... |
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44 | 44 | chartView->chart()->addSeries(series); |
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45 | 45 | |
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46 | 46 | QValueAxis *axisX = new QValueAxis; |
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47 | 47 | axisX->setRange(10, 20.5); |
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48 | 48 | axisX->setTickCount(10); |
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49 | 49 | axisX->setLabelFormat("%.2f"); |
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50 | 50 | chartView->chart()->setAxisX(axisX, series); |
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51 | 51 | \endcode |
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52 | 52 | */ |
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53 | 53 | |
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54 | 54 | /*! |
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55 | 55 | \qmlclass ValueAxis QValueAxis |
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56 | 56 | \inherits AbstractAxis |
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57 | 57 | \brief The ValueAxis element is used for manipulating chart's axes |
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58 | 58 | |
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59 | 59 | ValueAxis can be setup to show axis line with tick marks, grid lines and shades. |
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60 | 60 | Values of axis are drawn to position of ticks |
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61 | 61 | |
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62 | 62 | To access Axes you can use ChartView API. For example: |
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63 | 63 | \code |
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64 | 64 | ChartView { |
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65 | 65 | ValueAxis { |
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66 | 66 | id: xAxis |
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67 | 67 | min: 0 |
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68 | 68 | max: 10 |
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69 | 69 | } |
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70 | 70 | // Add a few series... |
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71 | 71 | } |
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72 | 72 | \endcode |
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73 | 73 | */ |
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74 | 74 | |
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75 | 75 | /*! |
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76 | 76 | \property QValueAxis::min |
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77 | 77 | Defines the minimum value on the axis. |
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78 | 78 | When setting this property the max is adjusted if necessary, to ensure that the range remains valid. |
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79 | 79 | */ |
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80 | 80 | /*! |
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81 | 81 | \qmlproperty real ValueAxis::min |
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82 | 82 | Defines the minimum value on the axis. |
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83 | 83 | When setting this property the max is adjusted if necessary, to ensure that the range remains valid. |
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84 | 84 | */ |
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85 | 85 | |
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86 | 86 | /*! |
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87 | 87 | \property QValueAxis::max |
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88 | 88 | Defines the maximum value on the axis. |
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89 | 89 | When setting this property the min is adjusted if necessary, to ensure that the range remains valid. |
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90 | 90 | */ |
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91 | 91 | /*! |
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92 | 92 | \qmlproperty real ValueAxis::max |
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93 | 93 | Defines the maximum value on the axis. |
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94 | 94 | When setting this property the min is adjusted if necessary, to ensure that the range remains valid. |
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95 | 95 | */ |
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96 | 96 | |
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97 | 97 | /*! |
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98 | 98 | \property QValueAxis::labelFormat |
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99 | 99 | Defines the label format for the axis. |
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100 | See QString::sprintf() for the details. | |
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100 | Supported specifiers are: d, i, o, x, X, f, F, e, E, g, G, c | |
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101 | See QString::sprintf() for additional details. | |
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101 | 102 | */ |
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102 | 103 | /*! |
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103 | 104 | \qmlproperty real ValueAxis::labelFormat |
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104 | 105 | Defines the label format for the axis. |
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105 | See QString::sprintf() for the details. | |
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106 | Supported specifiers are: d, i, o, x, X, f, F, e, E, g, G, c | |
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107 | See QString::sprintf() for additional details. | |
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106 | 108 | */ |
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107 | 109 | |
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108 | 110 | /*! |
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109 | 111 | \fn void QValueAxis::minChanged(qreal min) |
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110 | 112 | Axis emits signal when \a min of axis has changed. |
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111 | 113 | */ |
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112 | 114 | /*! |
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113 | 115 | \qmlsignal ValueAxis::onMinChanged(real min) |
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114 | 116 | Axis emits signal when \a min of axis has changed. |
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115 | 117 | */ |
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116 | 118 | |
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117 | 119 | /*! |
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118 | 120 | \fn void QValueAxis::maxChanged(qreal max) |
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119 | 121 | Axis emits signal when \a max of axis has changed. |
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120 | 122 | */ |
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121 | 123 | /*! |
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122 | 124 | \qmlsignal ValueAxis::onMaxChanged(real max) |
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123 | 125 | Axis emits signal when \a max of axis has changed. |
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124 | 126 | */ |
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125 | 127 | |
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126 | 128 | /*! |
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127 | 129 | \fn void QValueAxis::rangeChanged(qreal min, qreal max) |
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128 | 130 | Axis emits signal when \a min or \a max of axis has changed. |
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129 | 131 | */ |
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130 | 132 | |
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131 | 133 | /*! |
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132 | 134 | \property QValueAxis::tickCount |
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133 | 135 | The number of tick marks for the axis. |
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134 | 136 | */ |
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135 | 137 | |
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136 | 138 | /*! |
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137 | 139 | \qmlproperty int ValueAxis::tickCount |
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138 | 140 | The number of tick marks for the axis. |
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139 | 141 | */ |
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140 | 142 | |
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141 | 143 | /*! |
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142 | 144 | \property QValueAxis::niceNumbersEnabled |
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143 | 145 | Whether the nice numbers algorithm is enabled or not for the axis. |
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144 | 146 | */ |
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145 | 147 | |
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146 | 148 | /*! |
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147 | 149 | \qmlproperty bool ValueAxis::niceNumbersEnabled |
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148 | 150 | Whether the nice numbers algorithm is enabled or not for the axis. |
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149 | 151 | */ |
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150 | 152 | |
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151 | 153 | /*! |
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152 | 154 | Constructs an axis object which is a child of \a parent. |
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153 | 155 | */ |
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154 | 156 | QValueAxis::QValueAxis(QObject *parent) : |
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155 | 157 | QAbstractAxis(*new QValueAxisPrivate(this), parent) |
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156 | 158 | { |
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157 | 159 | |
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158 | 160 | } |
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159 | 161 | |
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160 | 162 | /*! |
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161 | 163 | \internal |
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162 | 164 | */ |
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163 | 165 | QValueAxis::QValueAxis(QValueAxisPrivate &d, QObject *parent) |
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164 | 166 | : QAbstractAxis(d, parent) |
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165 | 167 | { |
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166 | 168 | |
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167 | 169 | } |
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168 | 170 | |
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169 | 171 | /*! |
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170 | 172 | Destroys the object |
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171 | 173 | */ |
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172 | 174 | QValueAxis::~QValueAxis() |
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173 | 175 | { |
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174 | 176 | Q_D(QValueAxis); |
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175 | 177 | if (d->m_dataset) |
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176 | 178 | d->m_dataset->removeAxis(this); |
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177 | 179 | } |
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178 | 180 | |
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179 | 181 | void QValueAxis::setMin(qreal min) |
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180 | 182 | { |
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181 | 183 | Q_D(QValueAxis); |
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182 | 184 | setRange(min, qMax(d->m_max, min)); |
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183 | 185 | } |
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184 | 186 | |
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185 | 187 | qreal QValueAxis::min() const |
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186 | 188 | { |
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187 | 189 | Q_D(const QValueAxis); |
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188 | 190 | return d->m_min; |
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189 | 191 | } |
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190 | 192 | |
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191 | 193 | void QValueAxis::setMax(qreal max) |
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192 | 194 | { |
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193 | 195 | Q_D(QValueAxis); |
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194 | 196 | setRange(qMin(d->m_min, max), max); |
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195 | 197 | } |
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196 | 198 | |
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197 | 199 | qreal QValueAxis::max() const |
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198 | 200 | { |
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199 | 201 | Q_D(const QValueAxis); |
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200 | 202 | return d->m_max; |
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201 | 203 | } |
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202 | 204 | |
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203 | 205 | /*! |
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204 | 206 | Sets range from \a min to \a max on the axis. |
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205 | 207 | If min is greater than max then this function returns without making any changes. |
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206 | 208 | */ |
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207 | 209 | void QValueAxis::setRange(qreal min, qreal max) |
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208 | 210 | { |
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209 | 211 | Q_D(QValueAxis); |
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210 | 212 | bool changed = false; |
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211 | 213 | |
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212 | 214 | if (min > max) |
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213 | 215 | return; |
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214 | 216 | |
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215 | 217 | if (d->m_niceNumbers) { |
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216 | 218 | int ticks = d->m_tickCount; |
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217 | 219 | d->looseNiceNumbers(min, max, ticks); |
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218 | 220 | if (ticks != d->m_tickCount) |
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219 | 221 | setTickCount(ticks); |
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220 | 222 | } |
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221 | 223 | |
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222 | 224 | if (!qFuzzyCompare(d->m_min, min)) { |
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223 | 225 | d->m_min = min; |
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224 | 226 | changed = true; |
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225 | 227 | emit minChanged(min); |
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226 | 228 | } |
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227 | 229 | |
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228 | 230 | if (!qFuzzyCompare(d->m_max, max)) { |
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229 | 231 | d->m_max = max; |
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230 | 232 | changed = true; |
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231 | 233 | emit maxChanged(max); |
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232 | 234 | } |
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233 | 235 | |
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234 | 236 | if (changed) { |
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235 | 237 | emit rangeChanged(min, max); |
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236 | 238 | d->emitUpdated(); |
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237 | 239 | } |
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238 | 240 | } |
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239 | 241 | |
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240 | 242 | /*! |
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241 | 243 | Sets \a count for ticks on the axis. |
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242 | 244 | */ |
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243 | 245 | void QValueAxis::setTickCount(int count) |
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244 | 246 | { |
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245 | 247 | Q_D(QValueAxis); |
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246 | 248 | if (d->m_tickCount != count && count >= 2) { |
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247 | 249 | d->m_tickCount = count; |
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248 | 250 | d->emitUpdated(); |
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249 | 251 | } |
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250 | 252 | } |
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251 | 253 | |
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252 | 254 | /*! |
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253 | 255 | \fn int QValueAxis::tickCount() const |
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254 | 256 | Return number of ticks on the axis |
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255 | 257 | */ |
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256 | 258 | int QValueAxis::tickCount() const |
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257 | 259 | { |
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258 | 260 | Q_D(const QValueAxis); |
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259 | 261 | return d->m_tickCount; |
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260 | 262 | } |
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261 | 263 | |
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262 | 264 | void QValueAxis::setNiceNumbersEnabled(bool enable) |
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263 | 265 | { |
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264 | 266 | Q_D(QValueAxis); |
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265 | 267 | if (d->m_niceNumbers != enable) { |
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266 | 268 | d->m_niceNumbers = enable; |
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267 | 269 | if (enable && !qFuzzyCompare(d->m_max, d->m_min)) |
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268 | 270 | setRange(d->m_min, d->m_max); |
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269 | 271 | } |
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270 | 272 | } |
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271 | 273 | |
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272 | 274 | bool QValueAxis::niceNumbersEnabled() const |
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273 | 275 | { |
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274 | 276 | Q_D(const QValueAxis); |
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275 | 277 | return d->m_niceNumbers; |
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276 | 278 | } |
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277 | 279 | |
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278 | 280 | void QValueAxis::setLabelFormat(const QString &format) |
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279 | 281 | { |
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280 | 282 | Q_D(QValueAxis); |
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281 | 283 | d->m_format = format; |
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282 | 284 | } |
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283 | 285 | |
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284 | 286 | QString QValueAxis::labelFormat() const |
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285 | 287 | { |
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286 | 288 | Q_D(const QValueAxis); |
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287 | 289 | return d->m_format; |
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288 | 290 | } |
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289 | 291 | |
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290 | 292 | /*! |
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291 | 293 | Returns the type of the axis |
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292 | 294 | */ |
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293 | 295 | QAbstractAxis::AxisType QValueAxis::type() const |
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294 | 296 | { |
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295 | 297 | return AxisTypeValue; |
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296 | 298 | } |
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297 | 299 | |
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298 | 300 | ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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299 | 301 | |
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300 | 302 | QValueAxisPrivate::QValueAxisPrivate(QValueAxis *q) |
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301 | 303 | : QAbstractAxisPrivate(q), |
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302 | 304 | m_min(0), |
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303 | 305 | m_max(0), |
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304 | 306 | m_tickCount(5), |
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305 | 307 | m_niceNumbers(false), |
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306 | 308 | m_format(QString::null) |
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307 | 309 | { |
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308 | 310 | |
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309 | 311 | } |
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310 | 312 | |
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311 | 313 | QValueAxisPrivate::~QValueAxisPrivate() |
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312 | 314 | { |
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313 | 315 | |
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314 | 316 | } |
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315 | 317 | |
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316 | 318 | void QValueAxisPrivate::handleDomainUpdated() |
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317 | 319 | { |
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318 | 320 | Q_Q(QValueAxis); |
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319 | 321 | Domain *domain = qobject_cast<Domain *>(sender()); |
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320 | 322 | Q_ASSERT(domain); |
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321 | 323 | |
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322 | 324 | if (orientation() == Qt::Horizontal) |
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323 | 325 | q->setRange(domain->minX(), domain->maxX()); |
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324 | 326 | else if (orientation() == Qt::Vertical) |
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325 | 327 | q->setRange(domain->minY(), domain->maxY()); |
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326 | 328 | } |
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327 | 329 | |
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328 | 330 | |
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329 | 331 | void QValueAxisPrivate::setMin(const QVariant &min) |
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330 | 332 | { |
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331 | 333 | Q_Q(QValueAxis); |
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332 | 334 | bool ok; |
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333 | 335 | qreal value = min.toReal(&ok); |
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334 | 336 | if (ok) |
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335 | 337 | q->setMin(value); |
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336 | 338 | } |
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337 | 339 | |
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338 | 340 | void QValueAxisPrivate::setMax(const QVariant &max) |
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339 | 341 | { |
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340 | 342 | |
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341 | 343 | Q_Q(QValueAxis); |
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342 | 344 | bool ok; |
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343 | 345 | qreal value = max.toReal(&ok); |
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344 | 346 | if (ok) |
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345 | 347 | q->setMax(value); |
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346 | 348 | } |
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347 | 349 | |
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348 | 350 | void QValueAxisPrivate::setRange(const QVariant &min, const QVariant &max) |
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349 | 351 | { |
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350 | 352 | Q_Q(QValueAxis); |
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351 | 353 | bool ok1; |
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352 | 354 | bool ok2; |
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353 | 355 | qreal value1 = min.toReal(&ok1); |
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354 | 356 | qreal value2 = max.toReal(&ok2); |
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355 | 357 | if (ok1 && ok2) |
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356 | 358 | q->setRange(value1, value2); |
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357 | 359 | } |
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358 | 360 | |
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359 | 361 | ChartAxis *QValueAxisPrivate::createGraphics(ChartPresenter *presenter) |
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360 | 362 | { |
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361 | 363 | Q_Q(QValueAxis); |
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362 | 364 | if (m_orientation == Qt::Vertical) |
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363 | 365 | return new ChartValueAxisY(q, presenter); |
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364 | 366 | return new ChartValueAxisX(q, presenter); |
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365 | 367 | } |
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366 | 368 | |
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367 | 369 | void QValueAxisPrivate::intializeDomain(Domain *domain) |
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368 | 370 | { |
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369 | 371 | Q_Q(QValueAxis); |
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370 | 372 | if (qFuzzyCompare(m_max, m_min)) { |
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371 | 373 | if (m_orientation == Qt::Vertical) |
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372 | 374 | q->setRange(domain->minY(), domain->maxY()); |
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373 | 375 | else |
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374 | 376 | q->setRange(domain->minX(), domain->maxX()); |
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375 | 377 | } else { |
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376 | 378 | if (m_orientation == Qt::Vertical) |
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377 | 379 | domain->setRangeY(m_min, m_max); |
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378 | 380 | else |
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379 | 381 | domain->setRangeX(m_min, m_max); |
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380 | 382 | } |
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381 | 383 | } |
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382 | 384 | |
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383 | 385 | //algorithm defined by Paul S.Heckbert GraphicalGems I |
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384 | 386 | |
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385 | 387 | void QValueAxisPrivate::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount) const |
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386 | 388 | { |
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387 | 389 | qreal range = niceNumber(max - min, true); //range with ceiling |
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388 | 390 | qreal step = niceNumber(range / (ticksCount - 1), false); |
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389 | 391 | min = qFloor(min / step); |
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390 | 392 | max = qCeil(max / step); |
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391 | 393 | ticksCount = int(max - min) + 1; |
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392 | 394 | min *= step; |
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393 | 395 | max *= step; |
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394 | 396 | } |
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395 | 397 | |
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396 | 398 | //nice numbers can be expressed as form of 1*10^n, 2* 10^n or 5*10^n |
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397 | 399 | |
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398 | 400 | qreal QValueAxisPrivate::niceNumber(qreal x, bool ceiling) const |
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399 | 401 | { |
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400 | 402 | qreal z = qPow(10, qFloor(log10(x))); //find corresponding number of the form of 10^n than is smaller than x |
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401 | 403 | qreal q = x / z; //q<10 && q>=1; |
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402 | 404 | |
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403 | 405 | if (ceiling) { |
|
404 | 406 | if (q <= 1.0) q = 1; |
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405 | 407 | else if (q <= 2.0) q = 2; |
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406 | 408 | else if (q <= 5.0) q = 5; |
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407 | 409 | else q = 10; |
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408 | 410 | } else { |
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409 | 411 | if (q < 1.5) q = 1; |
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410 | 412 | else if (q < 3.0) q = 2; |
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411 | 413 | else if (q < 7.0) q = 5; |
|
412 | 414 | else q = 10; |
|
413 | 415 | } |
|
414 | 416 | return q * z; |
|
415 | 417 | } |
|
416 | 418 | |
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417 | 419 | #include "moc_qvalueaxis.cpp" |
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418 | 420 | #include "moc_qvalueaxis_p.cpp" |
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419 | 421 | |
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420 | 422 | QTCOMMERCIALCHART_END_NAMESPACE |
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