那个网站教做冰鲜鱼,摄影网站模板html,wordpress 论坛编辑器,电子产品展示网站两个核心类时QChart和QLineSeries
下面这个示例代码中#xff0c;定时器每隔一段时间将曲线图中的数据点向右移动 一个单位#xff0c;同时调整横坐标轴的范围#xff0c;实现了一次滚动对应移动一个数据点的效果。
QLineSeries最多容纳40961024个点
#include QtWidg…两个核心类时QChart和QLineSeries
下面这个示例代码中定时器每隔一段时间将曲线图中的数据点向右移动 一个单位同时调整横坐标轴的范围实现了一次滚动对应移动一个数据点的效果。
QLineSeries最多容纳40961024个点
#include QtWidgets/QApplication
#include QtWidgets/QMainWindow
#include QtCharts/QChartView
#include QtCharts/QLineSeries
#include QtCharts/QValueAxis
#include QtCore/QRandomGenerator
#include QtCore/QTimer
#include QDebugQT_CHARTS_USE_NAMESPACEint main(int argc, char *argv[])
{QApplication a(argc, argv);QMainWindow window;QChartView *chartView new QChartView(window);window.setCentralWidget(chartView);QChart *chart new QChart();chart-legend()-hide();chartView-setChart(chart);chart-createDefaultAxes();QLineSeries *series new QLineSeries();chart-addSeries(series);chart-createDefaultAxes();QValueAxis *axisX qobject_castQValueAxis *(chart-axes(Qt::Horizontal).at(0));QValueAxis *axisY qobject_castQValueAxis *(chart-axes(Qt::Vertical).at(0));axisY-setRange(0, 120);// 初始化数据点qreal startX 0;for (int i 0; i 100; i) {series-append(startX i, QRandomGenerator::global()-bounded(100));}int currentIndex 0; // 当前数据点索引QTimer timer;timer.setInterval(100);QObject::connect(timer, QTimer::timeout, [](){if (series-points().size() 4096 1024){int n series-points().size() - 4096;series-removePoints(0, n);currentIndex- n;qDebug() remove n;}qDebug() currentIndex;// 移动数据点//series-remove(0);series-append(series-points().last().x() 1, QRandomGenerator::global()-bounded(100));// 计算滚动后的横坐标范围qreal minX series-points().at(currentIndex).x();qreal maxX series-points().last().x();qreal targetMinX minX 1;qreal targetMaxX maxX 1;axisX-setRange(targetMinX, targetMaxX);currentIndex;});timer.start();window.resize(800, 600);window.show();return a.exec();
}.pro文件
QT core gui chartsgreaterThan(QT_MAJOR_VERSION, 4): QT widgetsCONFIG c11# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES QT_DISABLE_DEPRECATED_BEFORE0x060000 # disables all the APIs deprecated before Qt 6.0.0SOURCES \main.cppHEADERS TRANSLATIONS \myChart_zh_CN.ts# Default rules for deployment.
qnx: target.path /tmp/$${TARGET}/bin
else: unix:!android: target.path /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS target
