Qt_QChart的使用记录（小白）
- 2020 年 3 月 7 日
- 笔记
主要是记录柱状图的数值显示，散点图的点坐标显示（防止后续忘记，把文件都贴出来，方便复查）
资源库： WarehouseInputOrOutput.pro
1 QT += core gui 2 QT += charts 3 4 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets 5 6 TARGET = WarehouseInputOrOutput 7 TEMPLATE = app 8 9 DEFINES += QT_DEPRECATED_WARNINGS 10 11 SOURCES += main.cpp 12 warehouseinputoroutput.cpp 13 callout.cpp 14 15 HEADERS += warehouseinputoroutput.h 16 callout.h 17 18 FORMS += warehouseinputoroutput.ui
头文件：WarehouseInputOrOutput.h
1 #ifndef WAREHOUSEINPUTOROUTPUT_H 2 #define WAREHOUSEINPUTOROUTPUT_H 3 4 #include <QMainWindow> 5 #include <QtCharts/QChartView> 6 #include <QtCharts> 7 8 namespace Ui { 9 class WarehouseInputOrOutput; 10 } 11 12 class WarehouseInputOrOutput : public QMainWindow 13 { 14 Q_OBJECT 15 16 public: 17 explicit WarehouseInputOrOutput(QWidget *parent = 0); 18 ~WarehouseInputOrOutput(); 19 void initData(); 20 QChart* setBarData(); 21 QChart* setSeatterData(); 22 QChart* setChartNature(QChart* chart); 23 27 private: 28 Ui::WarehouseInputOrOutput *ui; 29 33 }; 34 35 #endif // WAREHOUSEINPUTOROUTPUT_H
定义：WarehouseInputOrOutput.cpp
1 #include "warehouseinputoroutput.h" 2 #include "ui_warehouseinputoroutput.h" 3 #include <QtCharts/QValueAxis> 4 #include <QtCharts> 5 #include <qlabel.h> 7 #include <QtGui/QMouseEvent> 8 #include <QtWidgets/QGridLayout> 9 #include <QtWidgets/QHBoxLayout> 10 11 WarehouseInputOrOutput::WarehouseInputOrOutput(QWidget *parent) : 12 QMainWindow(parent), 13 ui(new Ui::WarehouseInputOrOutput) 14 { 15 16 ui->setupUi(this); 17 18 initData(); 19 } 20 21 WarehouseInputOrOutput::~WarehouseInputOrOutput() 22 { 23 delete ui; 24 } 25 26 QChart* WarehouseInputOrOutput::setChartNature(QChart* chart) 27 { 28 29 chart->setTheme(QChart::ChartThemeLight); // 设置白色主题 30 chart->setDropShadowEnabled(true); // 背景阴影 31 // chart->addSeries(series); // 数据关联 32 chart->setTitleBrush(QBrush(QColor(0, 0, 255))); // 设置标题Brush 33 chart->setTitleFont(QFont("宋体")); // 设置标题字体 34 35 chart->legend()->setVisible(true); 36 chart->legend()->setAlignment(Qt::AlignBottom); // 对齐方式：底部对齐 37 chart->legend()->setBackgroundVisible(true); // 设置背景 可见 38 chart->legend()->setAutoFillBackground(true); // 自动填充背景 39 chart->legend()->setColor(QColor(222, 233, 251)); 40 chart->legend()->setLabelColor(QColor(0, 100, 255)); 41 // chart->legend()->setMaximumHeight(50); // 设置高度 42 // chart->legend()->hide(); 43 44 return chart; 45 } 46 47 QChart* WarehouseInputOrOutput::setBarData() 48 { 49 QChart* barChart = new QChart(); 50 QBarSet* set0 = new QBarSet("入库数"); 51 QBarSet* set1 = new QBarSet("出库数"); 52 QBarSet* set2 = new QBarSet("存量数"); 53 int maxXCount = 10; 54 int maxYCount = 1000; 55 56 // testData 57 QMap<int, int> barData; 58 for(int i = 0; i < 10; ++i) 59 { 62 barData[i] = i * 100 + 10; 63 } 64 for(int i = 0; i < 10;++i) 65 { 66 set0->append(barData[i]); 67 set1->append(barData[9 - i]); 68 } 69 for(int i = 0; i < maxXCount; ++ i) 70 { 71 set2->append(i * 100); 72 } 73 set0->setLabelColor(Qt::black); 74 set1->setLabelColor(Qt::red); 75 set2->setLabelColor(Qt::cyan); 76 77 QBarSeries* series = new QBarSeries(); 78 series->append(set0); 79 series->append(set1); 80 series->append(set2); 81 series->setVisible(true); 82 series->setLabelsVisible(true); 83 // 柱状图数字显示在最上方 84 series->setLabelsPosition(QAbstractBarSeries::LabelsInsideBase); 85 91 setChartNature(barChart); 92 barChart->addSeries(series); 93 barChart->setTitle("出入库统计"); 94 95 QCategoryAxis* axisX = new QCategoryAxis(); 98 axisX->setStartValue(-0.5); 99 for(int i = 1; i < maxXCount + 1; ++ i) 100 axisX->append("物料" + QString::number(i), i - 0.5); 101 102 QValueAxis *axisY = new QValueAxis; 103 axisY->setRange(0, maxYCount); //改为setRange(0,1);则表示坐标为动态计算大小的 104 axisY->setTitleText("数量"); 105 axisY->setLabelFormat("%d"); 106 107 barChart->setAxisX(axisX, series); 108 barChart->setAxisY(axisY, series); 109 series->attachAxis(axisX); 110 series->attachAxis(axisY); 120 121 return barChart; 122 } 123 124 QChart* WarehouseInputOrOutput::setSeatterData() 125 { 126 QChart* seatterChart = new QChart(); 127 int maxXCount = 10; 128 int maxYCount = 10000; 129 setChartNature(seatterChart); 130 seatterChart->setTitle("存量数"); 131 132 QCategoryAxis* axisX = new QCategoryAxis(); 133 // axisX->setMin(0); 134 axisX->setMax(maxXCount); 135 axisX->setStartValue(0); 136 for(int i = 1; i < maxXCount + 1; ++ i) 137 axisX->append("timer" + QString::number(i), i); 138 139 QValueAxis* axisY = new QValueAxis(); 140 axisY->setRange(0, maxYCount); 141 axisY->setTitleText("存量"); 142 axisY->setLabelFormat("%d"); 143 QScatterSeries* seatter = new QScatterSeries(); 144 for(int i = 1;i < maxXCount + 1; ++i) 145 seatter->append(i - 0.5, i * 1000); 146 seatter->setPen(QPen(Qt::NoPen)); 147 seatter->setColor(QColor(250, 220, 0)); 148 // 设置散点大小 149 seatter->setMarkerSize(25); 150 // 设置散点样式 151 // seatter->setMarkerShape(QScatterSeries::MarkerShapeRectangle); 152 seatter->setName("存量"); 153 // 显示设定点的坐标值 154 seatter->setPointLabelsFormat("(@xPoint, @yPoint)"); 155 seatter->setPointLabelsVisible(true); 156
159 seatterChart->addSeries(seatter);
157 seatter->attachAxis(axisX); 158 seatter->attachAxis(axisY);160 seatterChart->setAxisX(axisX, seatter); 161 seatterChart->setAxisY(axisY, seatter); 162 163 return seatterChart; 164 } 165 166 void WarehouseInputOrOutput::initData() 167 { 168 QChart* barChart = new QChart(); 169 barChart = setBarData(); 170 QChartView* showChart = new QChartView(barChart); 171 172 QChart* seatterChart = new QChart(); 173 seatterChart = setSeatterData(); 174 QChartView* showSeatter = new QChartView(seatterChart); 175 176 QGridLayout* gridLayout = new QGridLayout(); 177 gridLayout->addWidget(showSeatter, 1, 0); 178 gridLayout->addWidget(showChart, 2, 0); 179 resize(820, 600); 180 ui->centralWidget->setLayout(gridLayout); 181 182 return; 183 }
mian.cpp
1 #include "warehouseinputoroutput.h" 2 #include <QApplication> 3 4 int main(int argc, char *argv[]) 5 { 6 QApplication a(argc, argv); 7 WarehouseInputOrOutput w; 8 w.show(); 9 10 return a.exec(); 11 }
159 seatterChart->addSeries(seatter);
