学习一下Qt Charts的柱状图部分。参考书籍：Qt5.9 C++开发指南
效果图
头文件
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QtCharts/QChart>
using namespace QtCharts;
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();
private:
//创建散点图
void createScatterSeries();
private slots:
void on_rdoCircle_clicked();
void on_rdoRectangle_clicked();
void on_rdoStar_clicked();
void on_btnScatterColor_clicked();
void on_btnScatterBorderColor_clicked();
private:
Ui::MainWindow *ui;
QPainterPath m_starPath; //保存星形路径
};
#endif // MAINWINDOW_H
cpp文件
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QScatterSeries>
#include <QValueAxis>
#include <QtMath>
#include <QColorDialog>
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QStringList headText = QStringList() << QStringLiteral("产品价格") << QStringLiteral("空调(件)") << QStringLiteral("冰箱(件)") << QStringLiteral("洗衣机(件)") << QStringLiteral("总计(件)");
ui->tableWidget->setHorizontalHeaderLabels(headText);
ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
for (int i = 0; i < ui->tableWidget->rowCount(); i++)
{
int AirConditioner = ui->tableWidget->item(i, 1)->text().toInt();
int Refrigerator = ui->tableWidget->item(i, 2)->text().toInt();
int WashingMachine = ui->tableWidget->item(i, 3)->text().toInt();
int sum = AirConditioner + Refrigerator + WashingMachine;
QTableWidgetItem *item = new QTableWidgetItem(QString::number(sum));
ui->tableWidget->setItem(i, 4, item);
}
createScatterSeries();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::createScatterSeries()
{
ui->chartViewScatter->setRenderHint(QPainter::Antialiasing);
ui->chartViewScatter->chart()->setTitle(QStringLiteral("QScatterSeries演示"));
ui->chartViewScatter->chart()->setTheme(QChart::ChartThemeBlueCerulean);
//创建散点图序列，并添加数据
QScatterSeries *scatterSeries[4];
for (int i = 0; i < 4; i++)
{
scatterSeries[i] = new QScatterSeries;
scatterSeries[i]->setMarkerSize(30.0);
}
for (int row = 0; row < 4; row++)
{
scatterSeries[0]->append((row + 1) * 1000, ui->tableWidget->item(row, 1)->text().toInt());
scatterSeries[1]->append((row + 1) * 1000, ui->tableWidget->item(row, 2)->text().toInt());
scatterSeries[2]->append((row + 1) * 1000, ui->tableWidget->item(row, 3)->text().toInt());
scatterSeries[3]->append((row + 1) * 1000, ui->tableWidget->item(row, 4)->text().toInt());
}
//各物品设置散点样式：圆形
scatterSeries[0]->setMarkerShape(QScatterSeries::MarkerShapeCircle);
scatterSeries[1]->setMarkerShape(QScatterSeries::MarkerShapeCircle);
scatterSeries[2]->setMarkerShape(QScatterSeries::MarkerShapeCircle);
//平均分设置散点样式：星形
m_starPath.moveTo(28, 15);
for (int i = 1; i < 5; ++i) {
m_starPath.lineTo(14 + 14 * qCos(0.8 * i * M_PI),
15 + 14 * qSin(0.8 * i * M_PI));
}
m_starPath.closeSubpath();
QImage star(30, 30, QImage::Format_ARGB32);
star.fill(Qt::transparent);
QPainter painter(&star);
painter.setRenderHint(QPainter::Antialiasing);
painter.setPen(Qt::white);
painter.setBrush(Qt::yellow);
painter.drawPath(m_starPath);
scatterSeries[3]->setBrush(star);
scatterSeries[3]->setPen(QColor(Qt::transparent));
scatterSeries[0]->setName(QStringLiteral("空调"));
scatterSeries[1]->setName(QStringLiteral("冰箱"));
scatterSeries[2]->setName(QStringLiteral("洗衣机"));
scatterSeries[3]->setName(QStringLiteral("总计"));
for (int i = 0; i < 4; i++)
{
ui->chartViewScatter->chart()->addSeries(scatterSeries[i]);
}
//坐标轴
QValueAxis *axisX = new QValueAxis;
QValueAxis *axisY = new QValueAxis;
axisX->setRange(0, 5000);
axisX->setTickCount(6);
axisX->setTitleText(QStringLiteral("产品价格(元)"));
axisX->setLabelFormat("%d");
axisX->setVisible(true);
axisY->setRange(0, 300);
axisY->setTitleText(QStringLiteral("销售数量(件)"));
axisY->setLabelFormat("%d");
axisY->setVisible(true);
for (int i = 0; i < 4; i++)
{
ui->chartViewScatter->chart()->setAxisX(axisX, scatterSeries[i]);
ui->chartViewScatter->chart()->setAxisY(axisY, scatterSeries[i]);
}
//图例
ui->chartViewScatter->chart()->legend()->setAlignment(Qt::AlignRight);
ui->chartViewScatter->chart()->legend()->setMarkerShape(QLegend::MarkerShapeFromSeries);
}
void MainWindow::on_rdoCircle_clicked()
{
//各物品设置散点样式：圆形
QList<QAbstractSeries *> lisSeries = ui->chartViewScatter->chart()->series();
for (int i = 0; i < 3; i++)
{
QScatterSeries *series = dynamic_cast<QScatterSeries *>(lisSeries.at(i));
series->setMarkerShape(QScatterSeries::MarkerShapeCircle);
series->setBrush(Qt::green);
series->setPen(QPen(Qt::white, 2));
}
}
void MainWindow::on_rdoRectangle_clicked()
{
//各物品设置散点样式：矩形
QList<QAbstractSeries *> lisSeries = ui->chartViewScatter->chart()->series();
for (int i = 0; i < 3; i++)
{
QScatterSeries *series = dynamic_cast<QScatterSeries *>(lisSeries.at(i));
series->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
series->setBrush(Qt::green);
series->setPen(QPen(Qt::white, 2));
}
}
void MainWindow::on_rdoStar_clicked()
{
//各物品设置散点样式：星形
QImage star(30, 30, QImage::Format_ARGB32);
star.fill(Qt::transparent);
QPainter painter(&star);
painter.setRenderHint(QPainter::Antialiasing);
painter.setPen(Qt::white);
painter.setBrush(Qt::green);
painter.drawPath(m_starPath);
QList<QAbstractSeries *> lisSeries = ui->chartViewScatter->chart()->series();
for (int i = 0; i < 3; i++)
{
QScatterSeries *series = dynamic_cast<QScatterSeries *>(lisSeries.at(i));
series->setBrush(star);
series->setPen(QColor(Qt::transparent));
}
}
void MainWindow::on_btnScatterColor_clicked()
{
QColor color(Qt::white);
QColorDialog dlg(color);
if (dlg.exec() == QDialog::Accepted)
{
color = dlg.currentColor();
QList<QAbstractSeries *> lisSeries = ui->chartViewScatter->chart()->series();
for (int i = 0; i < 3; i++)
{
QScatterSeries *series = dynamic_cast<QScatterSeries *>(lisSeries.at(i));
series->setBrush(color);
series->setPen(QColor(Qt::white));
}
}
}
void MainWindow::on_btnScatterBorderColor_clicked()
{
QColor color(Qt::white);
QColorDialog dlg(color);
if (dlg.exec() == QDialog::Accepted)
{
color = dlg.currentColor();
QList<QAbstractSeries *> lisSeries = ui->chartViewScatter->chart()->series();
for (int i = 0; i < 3; i++)
{
QScatterSeries *series = dynamic_cast<QScatterSeries *>(lisSeries.at(i));
series->setPen(color);
}
}
}