87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
#include "coaldistributchartwidget.h"
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#include "ui_coaldistributchartwidget.h"
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#include <QVBoxLayout>
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CoalDistributChartWidget::CoalDistributChartWidget(QWidget *parent)
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: QWidget(parent), ui(new Ui::CoalDistributChartWidget) {
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initializeChart(); // 初始化图表
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initializeTimeAxis(); // 初始化时间轴
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// 设置定时器
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m_timer = new QTimer(this);
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connect(m_timer, &QTimer::timeout, this,
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&CoalDistributChartWidget::updateChart);
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ui->setupUi(this);
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m_timer->start(1000); // 每秒更新一次
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}
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CoalDistributChartWidget::~CoalDistributChartWidget() { delete ui; }
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void CoalDistributChartWidget::updateChart() {
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updateBarData();
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updateTimeAxis();
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}
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void CoalDistributChartWidget::initializeChart() {
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m_chart = new QChart(); // 将chart设为类成员
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m_series = new QBarSeries();
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// 创建柱状图数据
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m_barSet = new QBarSet("数据1");
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m_series->append(m_barSet);
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m_chart->addSeries(m_series);
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// 设置X轴为时间
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m_axisX = new QCategoryAxis();
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m_chart->addAxis(m_axisX, Qt::AlignBottom);
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m_series->attachAxis(m_axisX);
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// 设置Y轴为百分比
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m_axisY = new QValueAxis();
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m_axisY->setRange(0, 100); // 设置范围为0到100%
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m_chart->addAxis(m_axisY, Qt::AlignLeft);
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m_series->attachAxis(m_axisY);
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m_chart->setTitle("动态柱状图示例");
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auto *chartView = new QChartView(m_chart);
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chartView->setRenderHint(QPainter::Antialiasing);
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// 清空之前的布局，避免重复添加
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QLayout *currentLayout = this->layout();
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if (currentLayout) {
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QLayoutItem *item;
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while ((item = currentLayout->takeAt(0))) {
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delete item->widget(); // 删除现有的widget
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delete item; // 删除布局项
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}
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}
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// 创建新的布局
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QVBoxLayout *newLayout = new QVBoxLayout(this); // 使用不同的变量名
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newLayout->addWidget(chartView);
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setLayout(newLayout);
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}
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void CoalDistributChartWidget::initializeTimeAxis() {
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for (int i = 0; i < 5; ++i) {
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m_axisX->append(
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QDateTime::currentDateTime().addSecs(i).toString("HH:mm:ss"), i);
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}
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}
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void CoalDistributChartWidget::updateBarData() {
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// 更新柱状图数据
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*m_barSet << qrand() % 101; // 随机生成0到100之间的值
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}
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void CoalDistributChartWidget::updateTimeAxis() {
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// 更新时间轴
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m_axisX->remove(0); // 移除第一个时间
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m_axisX->append(QDateTime::currentDateTime().toString("HH:mm:ss"),
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4); // 添加新的时间
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}
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