Qt开发之QtCharts柱形图绘制

#include "barcharteg.h" #include <qtime> const int rows = 4; const int cols = 3; #if defined(_MSC_VER) && (_MSC_VER >= 1600) # pragma execution_character_set("utf-8") #endif BarChartEg::BarChartEg(QWidget *parent) : QWidget(parent) { ui.setupUi(this); InitTableWidget(); Init1(); Init2(); Init3(); } BarChartEg::~BarChartEg() { } //初始化表格 void BarChartEg::InitTableWidget() { ui.tableWidget->setRowCount(rows); ui.tableWidget->setColumnCount(cols); QStringList headerList; headerList << "CNR1" << "CNR2" << "CNR3"; ui.tableWidget->setHorizontalHeaderLabels(headerList); } //初始化一般柱状图 void BarChartEg::Init1() { //1.准备QChartView对象，用来显示chart view1 = new QChartView(ui.widget); InitChartView(view1, ui.widget); //2.准备QChart对象，用来绘图 chart1 = new QChart(); InitChart(chart1); //3.将chart添加到chartView上 view1->setChart(chart1); //4.设置坐标轴 InitAxis1(); //5.准备barSeries对象，用于存储数据 barSeries1 = new QBarSeries(this); InitBarSeries1(barSeries1); //6.准备barSet数据集，每组有几个柱形图就需要几个barset cnr1_1 = new QBarSet("CNR1"); cnr1_2 = new QBarSet("CNR2"); cnr1_3 = new QBarSet("CNR3"); InitBarSet(cnr1_1, cnr1_2, cnr1_3); //7.为序列barSeries添加数据集barSet QList<QBarSet *> barSetList; barSetList << cnr1_1 << cnr1_2 << cnr1_3; barSeries1->append(barSetList); //8.将序列barSeries添加到chart上 chart1->addSeries(barSeries1); //9.将坐标轴添加到chart上，并指定序列 chart1->setAxisX(xAxis1, barSeries1); chart1->setAxisY(yAxis1, barSeries1); } //初始化堆叠柱状图 void BarChartEg::Init2() { //1.准备QChartView对象，用来显示chart view2 = new QChartView(ui.widget_2); InitChartView(view2, ui.widget_2); //2.准备QChart对象，用来绘图 chart2 = new QChart(); InitChart(chart2); //3.将chart添加到chartView上 view2->setChart(chart2); //4.设置坐标轴 InitAxis2(); //5.准备barSeries对象，用于存储数据 stackedSeries2 = new QStackedBarSeries(this); InitBarSeries2(stackedSeries2); //6.准备barSet数据集，每组有几个柱形图就需要几个barset cnr2_1 = new QBarSet("CNR1"); cnr2_2 = new QBarSet("CNR2"); cnr2_3 = new QBarSet("CNR3"); InitBarSet(cnr2_1, cnr2_2, cnr2_3); //7.为序列barSeries添加数据集barSet QList<QBarSet *> barSetList; barSetList << cnr2_1 << cnr2_2 << cnr2_3; stackedSeries2->append(barSetList); //8.将序列barSeries添加到chart上 chart2->addSeries(stackedSeries2); //9.将坐标轴添加到chart上，并指定序列 chart2->setAxisX(xAxis2, stackedSeries2); chart2->setAxisY(yAxis2, stackedSeries2); } //初始化百分比柱状图 void BarChartEg::Init3() { //1.准备QChartView对象，用来显示chart view3 = new QChartView(ui.widget_3); InitChartView(view3, ui.widget_3); //2.准备QChart对象，用来绘图 chart3 = new QChart(); InitChart(chart3); //3.将chart添加到chartView上 view3->setChart(chart3); //4.设置坐标轴 InitAxis3(); //5.准备barSeries对象，用于存储数据 percentSeries3 = new QPercentBarSeries(this); InitBarSeries3(percentSeries3); //6.准备barSet数据集，每组有几个柱形图就需要几个barset cnr3_1 = new QBarSet("CNR1"); cnr3_2 = new QBarSet("CNR2"); cnr3_3 = new QBarSet("CNR3"); InitBarSet(cnr3_1, cnr3_2, cnr3_3); //7.为序列barSeries添加数据集barSet QList<QBarSet *> barSetList; barSetList << cnr3_1 << cnr3_2 << cnr3_3; percentSeries3->append(barSetList); //8.将序列barSeries添加到chart上 chart3->addSeries(percentSeries3); //9.将坐标轴添加到chart上，并指定序列 chart3->setAxisX(xAxis3, percentSeries3); chart3->setAxisY(yAxis3, percentSeries3); } //设置QChartView布局 void BarChartEg::InitChartView(QChartView *chartView, QWidget *widget) { chartView->setBackgroundBrush(QBrush(Qt::white)); QHBoxLayout *hLayout = new QHBoxLayout; hLayout->setContentsMargins(0, 0, 0, 0); hLayout->addWidget(chartView); widget->setLayout(hLayout); } //设置chart void BarChartEg::InitChart(QChart *chart) { chart->layout()->setContentsMargins(5, 0, 5, 5); chart->setMargins(QMargins(1, 0, 1, 1)); chart->setBackgroundRoundness(0); chart->setTheme(QChart::ChartThemeBlueCerulean); } //设置数据集外观 void BarChartEg::InitBarSet(QBarSet *set1, QBarSet *set2, QBarSet *set3) { //设置数据集标签字体 QFont font("宋体", 8, 0); font.setBold(true); set1->setLabelFont(font); set2->setLabelFont(font); set3->setLabelFont(font); //设置数据集标签颜色 set1->setLabelColor(QColor(255, 0, 0)); set2->setLabelColor(QColor(255, 0, 0)); set3->setLabelColor(QColor(255, 0, 0)); } //设置序列标签和宽度 void BarChartEg::InitBarSeries1(QBarSeries *barSeries) { //barSeries->setLabelsPosition(QAbstractBarSeries::LabelsCenter);//设置在柱形图内部中间 //barSeries->setLabelsPosition(QAbstractBarSeries::LabelsInsideEnd);//设置在柱形图内部顶端 //barSeries->setLabelsPosition(QAbstractBarSeries::LabelsInsideBase);//设置在柱形图内部下端 barSeries->setLabelsPosition(QAbstractBarSeries::LabelsOutsideEnd);//设置在柱形图外部上端 barSeries->setLabelsVisible(true); barSeries->setBarWidth(0.5); } void BarChartEg::InitBarSeries2(QStackedBarSeries *barSeries) { barSeries->setLabelsPosition(QAbstractBarSeries::LabelsCenter);//设置在柱形图外部上端 barSeries->setLabelsVisible(true); barSeries->setBarWidth(0.5); } void BarChartEg::InitBarSeries3(QPercentBarSeries *barSeries) { barSeries->setLabelsPosition(QAbstractBarSeries::LabelsCenter);//设置在柱形图外部上端 barSeries->setLabelsVisible(true); barSeries->setBarWidth(0.5); } //准备坐标轴对象 void BarChartEg::InitAxis1() { xAxis1 = new QBarCategoryAxis(this); xAxis1->setGridLineVisible(false); yAxis1 = new QValueAxis(this); yAxis1->setRange(0, 60); } //准备坐标轴对象 void BarChartEg::InitAxis2() { xAxis2 = new QBarCategoryAxis(this); xAxis2->setGridLineVisible(false); yAxis2 = new QValueAxis(this); yAxis2->setRange(0, 200); } //准备坐标轴对象 void BarChartEg::InitAxis3() { xAxis3 = new QBarCategoryAxis(this); xAxis3->setGridLineVisible(false); yAxis3 = new QValueAxis(this); yAxis3->setRange(0, 100); } //产生随机数，并将数据添加到数据集 void BarChartEg::on_pBtnRandom_clicked() { ClearData1(); ClearData2(); ClearData3(); qsrand(QTime::currentTime().second()); //随机数种子 for (int i = 0; i < rows; i++) { for (int j = 0; j < cols; j++) { double randomData = 30 + (qrand() % 30); //随机数 ui.tableWidget->setItem(i,j,new QTableWidgetItem(QString::asprintf("%.0f",randomData))); if (j == 0) { cnr1_1->append(randomData); cnr2_1->append(randomData); cnr3_1->append(randomData); } if (j == 1) { cnr1_2->append(randomData); cnr2_2->append(randomData); cnr3_2->append(randomData); } if (j == 2) { cnr1_3->append(randomData); cnr2_3->append(randomData); cnr3_3->append(randomData); } } categories1.append("序列"+QString::number(i + 1)); categories2.append("序列" + QString::number(i + 1)); categories3.append("序列" + QString::number(i + 1)); } //将横坐标的标签添加到横坐标轴 xAxis1->setCategories(categories1); xAxis2->setCategories(categories2); xAxis3->setCategories(categories3); } //清除数据 void BarChartEg::ClearData1() { //xAxis1->clear(); categories1.clear(); cnr1_1->remove(0, 4); cnr1_2->remove(0, 4); cnr1_3->remove(0, 4); } void BarChartEg::ClearData2() { //xAxis2->clear(); categories2.clear(); cnr2_1->remove(0, 4); cnr2_2->remove(0, 4); cnr2_3->remove(0, 4); } void BarChartEg::ClearData3() { //xAxis3->clear(); categories3.clear(); cnr3_1->remove(0, 4); cnr3_2->remove(0, 4); cnr3_3->remove(0, 4); }