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1 | 1 | #include "qchart.h" |
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2 | 2 | #include "qchartaxis.h" |
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3 | 3 | #include "qlegend.h" |
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4 | 4 | #include "chartpresenter_p.h" |
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5 | 5 | #include "chartdataset_p.h" |
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6 | 6 | #include "chartbackground_p.h" |
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7 | 7 | #include <QGraphicsScene> |
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8 | 8 | #include <QGraphicsSceneResizeEvent> |
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9 | 9 | #include <QDebug> |
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10 | 10 | |
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11 | 11 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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12 | 12 | |
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13 | 13 | /*! |
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14 | 14 | \enum QChart::ChartTheme |
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15 | 15 | |
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16 | 16 | This enum describes the theme used by the chart. |
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17 | 17 | |
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18 | 18 | \value ChartThemeDefault Follows the GUI style of the Operating System |
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19 | 19 | \value ChartThemeVanilla |
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20 | 20 | \value ChartThemeIcy |
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21 | 21 | \value ChartThemeGrayscale |
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22 | 22 | \value ChartThemeScientific |
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23 | 23 | \value ChartThemeBlueCerulean |
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24 | 24 | \value ChartThemeLight |
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25 | 25 | \value ChartThemeCount Not really a theme; the total count of themes. |
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26 | 26 | */ |
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27 | 27 | |
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28 | 28 | /*! |
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29 | 29 | \enum QChart::AnimationOption |
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30 | 30 | |
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31 | 31 | For enabling/disabling animations. Defaults to NoAnimation. |
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32 | 32 | |
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33 | 33 | \value NoAnimation |
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34 | 34 | \value GridAxisAnimations |
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35 | 35 | \value SeriesAnimations |
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36 | 36 | \value AllAnimations |
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37 | 37 | */ |
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38 | 38 | |
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39 | 39 | /*! |
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40 | 40 | \class QChart |
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41 | 41 | \brief QtCommercial chart API. |
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42 | 42 | |
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43 | 43 | QChart is a QGraphicsWidget that you can show in a QGraphicsScene. It manages the graphical |
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44 | 44 | representation of different types of QChartSeries and other chart related objects like |
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45 | 45 | QChartAxis and QChartLegend. If you simply want to show a chart in a layout, you can use the |
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46 | 46 | convenience class QChartView instead of QChart. |
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47 | 47 | \sa QChartView |
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48 | 48 | */ |
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49 | 49 | |
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50 | 50 | /*! |
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51 | 51 | Constructs a chart object which is a child of a\a parent. Parameter \a wFlags is passed to the QGraphicsWidget constructor. |
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52 | 52 | */ |
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53 | 53 | QChart::QChart(QGraphicsItem *parent, Qt::WindowFlags wFlags) : QGraphicsWidget(parent,wFlags), |
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54 | 54 | m_backgroundItem(0), |
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55 | 55 | m_titleItem(0), |
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56 | 56 | m_legend(new QLegend(this)), |
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57 | 57 | m_dataset(new ChartDataSet(this)), |
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58 | 58 | m_presenter(new ChartPresenter(this,m_dataset)), |
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59 | 59 | m_padding(50), |
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60 | 60 | m_backgroundPadding(10) |
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61 | 61 | { |
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62 | 62 | connect(m_dataset,SIGNAL(seriesAdded(QSeries*,Domain*)),m_legend,SLOT(handleSeriesAdded(QSeries*,Domain*))); |
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63 | 63 | connect(m_dataset,SIGNAL(seriesRemoved(QSeries*)),m_legend,SLOT(handleSeriesRemoved(QSeries*))); |
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64 | 64 | } |
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65 | 65 | |
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66 | 66 | /*! |
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67 | 67 | Destroys the object and it's children, like QChartSeries and QChartAxis object added to it. |
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68 | 68 | */ |
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69 | 69 | QChart::~QChart() |
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70 | 70 | { |
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71 | //delete first presenter , since this is a root of all the graphical items | |
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72 | delete m_presenter; | |
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73 | m_presenter=0; | |
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71 | 74 | } |
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72 | 75 | |
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73 | 76 | /*! |
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74 | 77 | Adds the \a series and optional \a axisY onto the chart and takes the ownership of the objects. |
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75 | 78 | If auto scaling is enabled, re-scales the axes the series is bound to (both the x axis and |
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76 | 79 | the y axis). |
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77 | 80 | */ |
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78 | 81 | void QChart::addSeries(QSeries* series, QChartAxis* axisY) |
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79 | 82 | { |
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80 | 83 | m_dataset->addSeries(series, axisY); |
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81 | 84 | } |
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82 | 85 | |
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83 | 86 | /*! |
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84 | 87 | Removes the \a series specified in a perameter from the QChartView. |
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85 | 88 | It releses its ownership of the specified QChartSeries object. |
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86 | 89 | It does not delete the pointed QChartSeries data object |
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87 | 90 | \sa addSeries(), removeAllSeries() |
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88 | 91 | */ |
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89 | 92 | void QChart::removeSeries(QSeries* series) |
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90 | 93 | { |
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91 | 94 | m_dataset->removeSeries(series); |
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92 | 95 | } |
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93 | 96 | |
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94 | 97 | /*! |
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95 | 98 | Removes all the QChartSeries that have been added to the QChartView |
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96 | 99 | It also deletes the pointed QChartSeries data objects |
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97 | 100 | \sa addSeries(), removeSeries() |
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98 | 101 | */ |
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99 | 102 | void QChart::removeAllSeries() |
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100 | 103 | { |
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101 | 104 | m_dataset->removeAllSeries(); |
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102 | 105 | } |
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103 | 106 | |
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104 | 107 | /*! |
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105 | 108 | Sets the \a brush that is used for painting the background of the chart area. |
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106 | 109 | */ |
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107 | 110 | void QChart::setBackgroundBrush(const QBrush& brush) |
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108 | 111 | { |
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109 | 112 | createChartBackgroundItem(); |
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110 | 113 | m_backgroundItem->setBrush(brush); |
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111 | 114 | m_backgroundItem->update(); |
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112 | 115 | } |
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113 | 116 | |
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114 | 117 | QBrush QChart::backgroundBrush() const |
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115 | 118 | { |
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116 | 119 | if(!m_backgroundItem) return QBrush(); |
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117 | 120 | return m_backgroundItem->brush(); |
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118 | 121 | } |
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119 | 122 | |
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120 | 123 | /*! |
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121 | 124 | Sets the \a pen that is used for painting the background of the chart area. |
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122 | 125 | */ |
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123 | 126 | void QChart::setBackgroundPen(const QPen& pen) |
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124 | 127 | { |
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125 | 128 | createChartBackgroundItem(); |
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126 | 129 | m_backgroundItem->setPen(pen); |
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127 | 130 | m_backgroundItem->update(); |
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128 | 131 | } |
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129 | 132 | |
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130 | 133 | QPen QChart::backgroundPen() const |
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131 | 134 | { |
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132 | 135 | if(!m_backgroundItem) return QPen(); |
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133 | 136 | return m_backgroundItem->pen(); |
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134 | 137 | } |
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135 | 138 | |
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136 | 139 | /*! |
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137 | 140 | Sets the chart \a title. The description text that is drawn above the chart. |
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138 | 141 | */ |
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139 | 142 | void QChart::setTitle(const QString& title) |
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140 | 143 | { |
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141 | 144 | createChartTitleItem(); |
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142 | 145 | m_titleItem->setText(title); |
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143 | 146 | updateLayout(); |
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144 | 147 | } |
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145 | 148 | |
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146 | 149 | /*! |
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147 | 150 | Returns the chart title. The description text that is drawn above the chart. |
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148 | 151 | */ |
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149 | 152 | QString QChart::title() const |
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150 | 153 | { |
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151 | 154 | if(m_titleItem) |
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152 | 155 | return m_titleItem->text(); |
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153 | 156 | else |
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154 | 157 | return QString(); |
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155 | 158 | } |
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156 | 159 | |
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157 | 160 | /*! |
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158 | 161 | Sets the \a font that is used for rendering the description text that is rendered above the chart. |
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159 | 162 | */ |
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160 | 163 | void QChart::setTitleFont(const QFont& font) |
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161 | 164 | { |
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162 | 165 | createChartTitleItem(); |
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163 | 166 | m_titleItem->setFont(font); |
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164 | 167 | updateLayout(); |
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165 | 168 | } |
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166 | 169 | |
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167 | 170 | /*! |
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168 | 171 | Sets the \a brush used for rendering the title text. |
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169 | 172 | */ |
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170 | 173 | void QChart::setTitleBrush(const QBrush &brush) |
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171 | 174 | { |
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172 | 175 | createChartTitleItem(); |
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173 | 176 | m_titleItem->setBrush(brush); |
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174 | 177 | updateLayout(); |
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175 | 178 | } |
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176 | 179 | |
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177 | 180 | /*! |
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178 | 181 | Returns the brush used for rendering the title text. |
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179 | 182 | */ |
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180 | 183 | QBrush QChart::titleBrush() const |
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181 | 184 | { |
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182 | 185 | if(!m_titleItem) return QBrush(); |
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183 | 186 | return m_titleItem->brush(); |
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184 | 187 | } |
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185 | 188 | |
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186 | 189 | void QChart::createChartBackgroundItem() |
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187 | 190 | { |
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188 | 191 | if(!m_backgroundItem) { |
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189 | 192 | m_backgroundItem = new ChartBackground(this); |
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190 | 193 | m_backgroundItem->setPen(Qt::NoPen); |
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191 | 194 | m_backgroundItem->setZValue(ChartPresenter::BackgroundZValue); |
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192 | 195 | } |
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193 | 196 | } |
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194 | 197 | |
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195 | 198 | void QChart::createChartTitleItem() |
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196 | 199 | { |
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197 | 200 | if(!m_titleItem) { |
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198 | 201 | m_titleItem = new QGraphicsSimpleTextItem(this); |
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199 | 202 | m_titleItem->setZValue(ChartPresenter::BackgroundZValue); |
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200 | 203 | } |
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201 | 204 | } |
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202 | 205 | |
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203 | 206 | /*! |
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204 | 207 | Sets the \a theme used by the chart for rendering the graphical representation of the data |
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205 | 208 | \sa ChartTheme, chartTheme() |
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206 | 209 | */ |
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207 | 210 | void QChart::setChartTheme(QChart::ChartTheme theme) |
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208 | 211 | { |
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209 | 212 | m_presenter->setChartTheme(theme); |
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210 | 213 | } |
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211 | 214 | |
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212 | 215 | /*! |
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213 | 216 | Returns the theme enum used by the chart. |
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214 | 217 | \sa ChartTheme, setChartTheme() |
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215 | 218 | */ |
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216 | 219 | QChart::ChartTheme QChart::chartTheme() const |
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217 | 220 | { |
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218 | 221 | return m_presenter->chartTheme(); |
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219 | 222 | } |
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220 | 223 | |
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221 | 224 | /*! |
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222 | 225 | Zooms in the view by a factor of 2 |
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223 | 226 | */ |
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224 | 227 | void QChart::zoomIn() |
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225 | 228 | { |
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226 | 229 | m_presenter->zoomIn(); |
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227 | 230 | } |
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228 | 231 | |
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229 | 232 | /*! |
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230 | 233 | Zooms in the view to a maximum level at which \a rect is still fully visible. |
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231 | 234 | */ |
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232 | 235 | void QChart::zoomIn(const QRectF& rect) |
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233 | 236 | { |
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234 | 237 | |
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235 | 238 | if(!rect.isValid()) return; |
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236 | 239 | m_presenter->zoomIn(rect); |
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237 | 240 | } |
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238 | 241 | |
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239 | 242 | /*! |
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240 | 243 | Restores the view zoom level to the previous one. |
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241 | 244 | */ |
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242 | 245 | void QChart::zoomOut() |
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243 | 246 | { |
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244 | 247 | m_presenter->zoomOut(); |
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245 | 248 | } |
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246 | 249 | |
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247 | 250 | /*! |
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248 | 251 | Returns the pointer to the x axis object of the chart |
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249 | 252 | */ |
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250 | 253 | QChartAxis* QChart::axisX() const |
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251 | 254 | { |
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252 | 255 | return m_dataset->axisX(); |
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253 | 256 | } |
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254 | 257 | |
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255 | 258 | /*! |
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256 | 259 | Returns the pointer to the y axis object of the chart |
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257 | 260 | */ |
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258 | 261 | QChartAxis* QChart::axisY() const |
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259 | 262 | { |
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260 | 263 | return m_dataset->axisY(); |
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261 | 264 | } |
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262 | 265 | |
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263 | 266 | /*! |
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264 | 267 | Returns the legend object of the chart. Ownership stays in chart. |
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265 | 268 | */ |
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266 | 269 | QLegend* QChart::legend() const |
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267 | 270 | { |
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268 | 271 | return m_legend; |
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269 | 272 | } |
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270 | 273 | |
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271 | 274 | /*! |
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272 | 275 | Resizes and updates the chart area using the \a event data |
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273 | 276 | */ |
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274 | 277 | void QChart::resizeEvent(QGraphicsSceneResizeEvent *event) |
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275 | 278 | { |
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276 | 279 | |
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277 | 280 | m_rect = QRectF(QPoint(0,0),event->newSize()); |
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278 | 281 | updateLayout(); |
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279 | 282 | QGraphicsWidget::resizeEvent(event); |
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280 | 283 | update(); |
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281 | 284 | } |
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282 | 285 | |
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283 | 286 | /*! |
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284 | 287 | Sets animation \a options for the chart |
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285 | 288 | */ |
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286 | 289 | void QChart::setAnimationOptions(AnimationOptions options) |
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287 | 290 | { |
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288 | 291 | m_presenter->setAnimationOptions(options); |
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289 | 292 | } |
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290 | 293 | |
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291 | 294 | /*! |
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292 | 295 | Returns animation options for the chart |
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293 | 296 | */ |
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294 | 297 | QChart::AnimationOptions QChart::animationOptions() const |
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295 | 298 | { |
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296 | 299 | return m_presenter->animationOptions(); |
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297 | 300 | } |
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298 | 301 | |
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299 | 302 | void QChart::scrollLeft() |
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300 | 303 | { |
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301 | 304 | m_presenter->scroll(-m_presenter->geometry().width()/(axisX()->ticksCount()-1),0); |
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302 | 305 | } |
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303 | 306 | |
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304 | 307 | void QChart::scrollRight() |
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305 | 308 | { |
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306 | 309 | m_presenter->scroll(m_presenter->geometry().width()/(axisX()->ticksCount()-1),0); |
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307 | 310 | } |
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308 | 311 | void QChart::scrollUp() |
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309 | 312 | { |
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310 | 313 | m_presenter->scroll(0,m_presenter->geometry().width()/(axisY()->ticksCount()-1)); |
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311 | 314 | } |
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312 | 315 | void QChart::scrollDown() |
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313 | 316 | { |
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314 | 317 | m_presenter->scroll(0,-m_presenter->geometry().width()/(axisY()->ticksCount()-1)); |
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315 | 318 | } |
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316 | 319 | |
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317 | 320 | void QChart::updateLayout() |
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318 | 321 | { |
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319 | 322 | if(!m_rect.isValid()) return; |
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320 | 323 | |
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321 | 324 | QRectF rect = m_rect.adjusted(m_padding,m_padding, -m_padding, -m_padding); |
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322 | 325 | |
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323 | 326 | // recalculate title position |
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324 | 327 | if (m_titleItem) { |
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325 | 328 | QPointF center = m_rect.center() -m_titleItem->boundingRect().center(); |
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326 | 329 | m_titleItem->setPos(center.x(),m_rect.top()/2 + m_padding/2); |
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327 | 330 | } |
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328 | 331 | |
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329 | 332 | //recalculate background gradient |
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330 | 333 | if (m_backgroundItem) { |
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331 | 334 | m_backgroundItem->setRect(m_rect.adjusted(m_backgroundPadding,m_backgroundPadding, -m_backgroundPadding, -m_backgroundPadding)); |
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332 | 335 | } |
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333 | 336 | |
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334 | 337 | // recalculate legend position |
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335 | 338 | if (m_legend) { |
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336 | 339 | if (m_legend->parentObject() == this) { |
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337 | 340 | m_legend->setMaximumSize(rect.size()); |
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338 | 341 | m_legend->setPos(rect.topLeft()); |
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339 | 342 | } |
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340 | 343 | } |
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341 | 344 | } |
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342 | 345 | |
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343 | 346 | |
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344 | 347 | int QChart::padding() const |
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345 | 348 | { |
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346 | 349 | return m_padding; |
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347 | 350 | } |
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348 | 351 | |
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349 | 352 | void QChart::setPadding(int padding) |
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350 | 353 | { |
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351 | 354 | if(m_padding==padding){ |
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352 | 355 | m_padding = padding; |
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353 | 356 | m_presenter->handleGeometryChanged(); |
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354 | 357 | updateLayout(); |
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355 | 358 | } |
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356 | 359 | } |
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357 | 360 | |
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358 | 361 | void QChart::setBackgroundPadding(int padding) |
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359 | 362 | { |
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360 | 363 | if(m_backgroundPadding!=padding){ |
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361 | 364 | m_backgroundPadding = padding; |
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362 | 365 | updateLayout(); |
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363 | 366 | } |
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364 | 367 | } |
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365 | 368 | |
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366 | 369 | void QChart::setBackgroundDiameter(int diameter) |
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367 | 370 | { |
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368 | 371 | createChartBackgroundItem(); |
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369 | 372 | m_backgroundItem->setDimeter(diameter); |
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370 | 373 | m_backgroundItem->update(); |
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371 | 374 | } |
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372 | 375 | |
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373 | 376 | void QChart::setBackgroundVisible(bool visible) |
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374 | 377 | { |
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375 | 378 | createChartBackgroundItem(); |
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376 | 379 | m_backgroundItem->setVisible(visible); |
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377 | 380 | } |
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378 | 381 | |
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379 | 382 | bool QChart::isBackgroundVisible() const |
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380 | 383 | { |
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381 | 384 | if(!m_backgroundItem) return false; |
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382 | 385 | return m_backgroundItem->isVisible(); |
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383 | 386 | } |
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384 | 387 | |
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385 | 388 | |
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386 | 389 | #include "moc_qchart.cpp" |
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387 | 390 | |
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388 | 391 | QTCOMMERCIALCHART_END_NAMESPACE |
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