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1 | 1 | /**************************************************************************** |
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2 | 2 | ** |
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3 | 3 | ** Copyright (C) 2014 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.io |
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6 | 6 | ** |
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7 | 7 | ** This file is part of the Qt Charts module. |
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8 | 8 | ** |
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9 | 9 | ** Licensees holding valid commercial license for Qt may use this file in |
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10 | 10 | ** accordance with the Qt License Agreement provided with the Software |
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11 | 11 | ** or, alternatively, in accordance with the terms contained in a written |
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12 | 12 | ** agreement between you and Digia. |
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13 | 13 | ** |
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14 | 14 | ** If you have questions regarding the use of this file, please use |
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15 | 15 | ** contact form at http://qt.io |
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16 | 16 | ** |
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17 | 17 | ****************************************************************************/ |
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18 | 18 | |
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19 | 19 | #include <private/chartbarcategoryaxisx_p.h> |
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20 | 20 | #include <private/chartpresenter_p.h> |
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21 | 21 | #include <private/qbarcategoryaxis_p.h> |
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22 | 22 | #include <private/abstractchartlayout_p.h> |
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23 | 23 | #include <QtCore/QDebug> |
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24 | 24 | #include <QtCore/QtMath> |
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25 | 25 | |
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26 | 26 | QT_CHARTS_BEGIN_NAMESPACE |
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27 | 27 | |
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28 | 28 | ChartBarCategoryAxisX::ChartBarCategoryAxisX(QBarCategoryAxis *axis, QGraphicsItem* item) |
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29 | 29 | : HorizontalAxis(axis, item, true), |
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30 | 30 | m_categoriesAxis(axis) |
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31 | 31 | { |
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32 | 32 | QObject::connect(m_categoriesAxis,SIGNAL(categoriesChanged()),this, SLOT(handleCategoriesChanged())); |
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33 | 33 | handleCategoriesChanged(); |
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34 | 34 | } |
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35 | 35 | |
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36 | 36 | ChartBarCategoryAxisX::~ChartBarCategoryAxisX() |
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37 | 37 | { |
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38 | 38 | } |
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39 | 39 | |
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40 | 40 | QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const |
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41 | 41 | { |
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42 | 42 | QVector<qreal> points; |
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43 | 43 | const QRectF& gridRect = gridGeometry(); |
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44 | 44 | qreal range = max() - min(); |
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45 | 45 | const qreal delta = gridRect.width() / range; |
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46 | 46 | |
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47 | 47 | if (delta < 2) |
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48 | 48 | return points; |
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49 | 49 | |
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50 | 50 | qreal adjustedMin = min() + 0.5; |
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51 | 51 | qreal offset = (ceil(adjustedMin) - adjustedMin) * delta; |
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52 | 52 | |
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53 | 53 | int count = qFloor(range); |
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54 | 54 | if (count < 1) |
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55 | 55 | return points; |
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56 | 56 | |
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57 | 57 | points.resize(count + 2); |
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58 | 58 | |
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59 | 59 | for (int i = 0; i < count + 2; ++i) |
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60 | 60 | points[i] = offset + (qreal(i) * delta) + gridRect.left(); |
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61 | 61 | |
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62 | 62 | return points; |
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63 | 63 | } |
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64 | 64 | |
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65 | 65 | QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& layout) const |
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66 | 66 | { |
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67 | 67 | QStringList result ; |
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68 | 68 | const QRectF &gridRect = gridGeometry(); |
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69 | 69 | qreal d = (max() - min()) / gridRect.width(); |
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70 | 70 | |
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71 | 71 | for (int i = 0; i < layout.count() - 1; ++i) { |
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72 | 72 | qreal x = qFloor((((layout[i] + layout[i + 1]) / 2 - gridRect.left()) * d + min() + 0.5)); |
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73 | if (x < max() && (x >= 0)) { | |
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73 | if (x < max() && (x >= 0) && x < m_categoriesAxis->categories().count()) { | |
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74 | 74 | result << m_categoriesAxis->categories().at(x); |
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75 | 75 | } else { |
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76 | 76 | // No label for x coordinate |
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77 | 77 | result << QString(); |
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78 | 78 | } |
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79 | 79 | } |
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80 | 80 | result << QString(); |
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81 | 81 | return result; |
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82 | 82 | } |
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83 | 83 | |
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84 | 84 | |
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85 | 85 | void ChartBarCategoryAxisX::updateGeometry() |
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86 | 86 | { |
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87 | 87 | const QVector<qreal>& layout = ChartAxisElement::layout(); |
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88 | 88 | if (layout.isEmpty()) |
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89 | 89 | return; |
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90 | 90 | setLabels(createCategoryLabels(layout)); |
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91 | 91 | HorizontalAxis::updateGeometry(); |
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92 | 92 | } |
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93 | 93 | |
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94 | 94 | void ChartBarCategoryAxisX::handleCategoriesChanged() |
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95 | 95 | { |
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96 | 96 | QGraphicsLayoutItem::updateGeometry(); |
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97 | 97 | if(presenter()) presenter()->layout()->invalidate(); |
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98 | 98 | } |
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99 | 99 | |
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100 | 100 | QSizeF ChartBarCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const |
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101 | 101 | { |
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102 | 102 | Q_UNUSED(constraint) |
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103 | 103 | |
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104 | 104 | QSizeF sh; |
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105 | 105 | QSizeF base = HorizontalAxis::sizeHint(which, constraint); |
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106 | 106 | QStringList ticksList = m_categoriesAxis->categories(); |
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107 | 107 | |
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108 | 108 | qreal width = 0; // Width is irrelevant for X axes with interval labels |
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109 | 109 | qreal height = 0; |
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110 | 110 | |
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111 | 111 | switch (which) { |
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112 | 112 | case Qt::MinimumSize: { |
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113 | 113 | QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), |
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114 | 114 | QStringLiteral("..."), |
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115 | 115 | axis()->labelsAngle()); |
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116 | 116 | height = boundingRect.height() + labelPadding() + base.height() + 1.0; |
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117 | 117 | sh = QSizeF(width, height); |
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118 | 118 | break; |
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119 | 119 | } |
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120 | 120 | case Qt::PreferredSize:{ |
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121 | 121 | qreal labelHeight = 0.0; |
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122 | 122 | foreach (const QString& s, ticksList) { |
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123 | 123 | QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle()); |
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124 | 124 | labelHeight = qMax(rect.height(), labelHeight); |
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125 | 125 | } |
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126 | 126 | height = labelHeight + labelPadding() + base.height() + 1.0; |
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127 | 127 | sh = QSizeF(width, height); |
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128 | 128 | break; |
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129 | 129 | } |
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130 | 130 | default: |
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131 | 131 | break; |
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132 | 132 | } |
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133 | 133 | return sh; |
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134 | 134 | } |
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135 | 135 | |
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136 | 136 | #include "moc_chartbarcategoryaxisx_p.cpp" |
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137 | 137 | |
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138 | 138 | QT_CHARTS_END_NAMESPACE |
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