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#pragma execution_character_set("utf-8")#pragma once#include #include #include "ui_QtChartTimeAxis.h"#include #include class QtChartTimeAxis : public QWidget{ Q_OBJECTpublic: QtChartTimeAxis(QWidget *parent = Q_NULLPTR);public: void addPoint(QDateTime dateTime, int y_value);private slots: void on_startButton_clicked(); void oneSecondAction();private: Ui::QtChartTimeAxisClass ui; void initLineChart(); void setLineChartMargins(QChart* chart, int margin); void addOnePointToChart(QLineSeries* targetSeries, int secondCount, int y_value); static void setAxisFormat(QValueAxis* axis, QXYSeries* lineSeries, QString titleString, QColor color); static QString getFileContent(QString strFile); QLineSeries* m_LeftSeries = NULL; QDateTimeAxis* m_AxisX_Time = NULL; QValueAxis* m_AxisY_Left; QChart* m_LineChart = NULL; QTimer* m_DrawTimer = NULL; const QDate m_BaseDate = QDate::currentDate(); const QTime m_BaseTime = QTime(0, 0, 0); QStringList m_DataList; int second_count = 0;}; #include "QtChartTimeAxis.h"QtChartTimeAxis::QtChartTimeAxis(QWidget *parent) : QWidget(parent){ ui.setupUi(this); //初始化折线图的设置 initLineChart(); //初始化一个定时器 m_DrawTimer = new QTimer(this); connect(m_DrawTimer, &QTimer::timeout, this, &QtChartTimeAxis::oneSecondAction);}void QtChartTimeAxis::addPoint(QDateTime dateTime, int y_value){ if (m_LeftSeries != NULL) {// QTime time = dateTime.time();// if (!time.setHMS(time.hour(), time.minute(), time.second(), 0))// {// Q_ASSERT(0);// }// dateTime.setTime(time);// qDebug() << dateTime; m_LeftSeries->append(dateTime.toMSecsSinceEpoch(), y_value); }}/** * 按键的响应槽函数 */void QtChartTimeAxis::on_startButton_clicked(){ second_count = 0; //从文本中读取数据，用于绘制 QString txt = getFileContent("data.csv"); m_DataList = txt.split(","); m_DrawTimer->start(100);//1秒执行一次}void QtChartTimeAxis::oneSecondAction(){ second_count++; //所有数据绘制完毕，结束定时器 if (second_count > m_DataList.count() - 1) { m_DrawTimer->stop(); return; } addOnePointToChart(m_LeftSeries, second_count, m_DataList[second_count].toInt());}//初始化折线图void QtChartTimeAxis::initLineChart() { m_AxisX_Time = new QDateTimeAxis(); m_AxisY_Left = new QValueAxis(); m_LeftSeries = new QLineSeries(); m_LineChart = new QChart(); //添加曲线到chart中 m_LineChart->addSeries(m_LeftSeries); QDateTime temp_StartTime(m_BaseDate, QTime(0, 0, 0)); m_AxisX_Time->setTickCount(25); // 网格数 m_AxisX_Time->setRange(temp_StartTime, temp_StartTime.addDays(1));//时间显示范围 //坐标轴显示方式: 时:分 m_AxisX_Time->setFormat("hh:mm"); //设置坐标轴显示范围 m_AxisY_Left->setRange(0, 30); setAxisFormat(m_AxisY_Left, m_LeftSeries, "left", QColor(Qt::green)); //把坐标轴添加到chart中， //addAxis函数的第二个参数是设置坐标轴的位置， //只有四个选项，下方：Qt::AlignBottom，左边：Qt::AlignLeft，右边：Qt::AlignRight，上方：Qt::AlignTop m_LineChart->addAxis(m_AxisX_Time, Qt::AlignBottom); m_LineChart->addAxis(m_AxisY_Left, Qt::AlignLeft); //把曲线关联到坐标轴 m_LeftSeries->attachAxis(m_AxisX_Time); m_LeftSeries->attachAxis(m_AxisY_Left); setLineChartMargins(m_LineChart, -1);//设置折线图边距 m_LineChart->legend()->hide();//将图例关闭 ui.graphicsView->setChart(m_LineChart);}/** * 用于设置折线图边距 */void QtChartTimeAxis::setLineChartMargins(QChart *chart, int margin) { QMargins m_Margin; m_Margin.setLeft(margin); m_Margin.setBottom(margin); m_Margin.setRight(margin); m_Margin.setTop(margin); chart->setMargins(m_Margin);}/** * 添添加一个点 */void QtChartTimeAxis::addOnePointToChart(QLineSeries *targetSeries, int secondCount, int y_value) { QDateTime temp_AddTimePos(m_BaseDate, m_BaseTime.addSecs(secondCount * 60)); // 每分钟增加一个点 qDebug() << temp_AddTimePos; targetSeries->append(temp_AddTimePos.toMSecsSinceEpoch(), y_value);}/** * 设置坐标轴样式 */void QtChartTimeAxis::setAxisFormat(QValueAxis *axis, QXYSeries *lineSeries, QString titleString, QColor color) {// axis->setTitleText(titleString);// axis->setTitleFont(QFont("黑体", 8, QFont::Medium, false));// axis->setTitleBrush(color);// axis->setLinePenColor(color); lineSeries->setPen(QPen(color, 0.6, Qt::SolidLine, Qt::SquareCap, Qt::RoundJoin));}//读取文件内容QString QtChartTimeAxis::getFileContent(QString strFile){ QFile file(strFile); QString txt; if (!file.open(QIODevice::ReadWrite)) { txt = ""; } else { txt = file.readAll(); } file.close(); return txt;}
#include "dialog.h"#include "ui_dialog.h"#includeDialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog){ ui->setupUi(this); timeChart = new QtChartTimeAxis(); ui->horizontalLayout_2->addWidget(timeChart); m_addPointTimer = new QTimer(this); connect(m_addPointTimer, &QTimer::timeout, this, &Dialog::onAddPointTimer);}Dialog::~Dialog(){ delete ui;}void Dialog::on_pushButton_clicked(){ m_addPointTimer->start(500); dateTime = QDateTime::currentDateTime();}void Dialog::onAddPointTimer(){ dateTime = dateTime.addSecs(60 * 1); qsrand(QTime::currentTime().msec()); timeChart->addPoint(dateTime, 15 + qrand() % 10);}
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