ScopeView.qml Example File

qmloscilloscope/qml/qmloscilloscope/ScopeView.qml
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import QtQuick 2.0 import QtCharts 2.1 ChartView { id: chartView animationOptions: ChartView.NoAnimation theme: ChartView.ChartThemeDark property bool openGL: true property bool openGLSupported: true onOpenGLChanged: { if (openGLSupported) { series("signal 1").useOpenGL = openGL; series("signal 2").useOpenGL = openGL; } } Component.onCompleted: { if (!series("signal 1").useOpenGL) { openGLSupported = false openGL = false } } ValueAxis { id: axisY1 min: -1 max: 4 } ValueAxis { id: axisY2 min: -10 max: 5 } ValueAxis { id: axisX min: 0 max: 1024 } LineSeries { id: lineSeries1 name: "signal 1" axisX: axisX axisY: axisY1 useOpenGL: chartView.openGL } LineSeries { id: lineSeries2 name: "signal 2" axisX: axisX axisYRight: axisY2 useOpenGL: chartView.openGL } Timer { id: refreshTimer interval: 1 / 60 * 1000 // 60 Hz running: true repeat: true onTriggered: { dataSource.update(chartView.series(0)); dataSource.update(chartView.series(1)); } } function changeSeriesType(type) { chartView.removeAllSeries(); // Create two new series of the correct type. Axis x is the same for both of the series, // but the series have their own y-axes to make it possible to control the y-offset // of the "signal sources". if (type == "line") { var series1 = chartView.createSeries(ChartView.SeriesTypeLine, "signal 1", axisX, axisY1); series1.useOpenGL = chartView.openGL var series2 = chartView.createSeries(ChartView.SeriesTypeLine, "signal 2", axisX, axisY2); series2.useOpenGL = chartView.openGL } else { var series1 = chartView.createSeries(ChartView.SeriesTypeScatter, "signal 1", axisX, axisY1); series1.markerSize = 2; series1.borderColor = "transparent"; series1.useOpenGL = chartView.openGL var series2 = chartView.createSeries(ChartView.SeriesTypeScatter, "signal 2", axisX, axisY2); series2.markerSize = 2; series2.borderColor = "transparent"; series2.useOpenGL = chartView.openGL } } function createAxis(min, max) { // The following creates a ValueAxis object that can be then set as a x or y axis for a series return Qt.createQmlObject("import QtQuick 2.0; import QtCharts 2.0; ValueAxis { min: " + min + "; max: " + max + " }", chartView); } function setAnimations(enabled) { if (enabled) chartView.animationOptions = ChartView.SeriesAnimations; else chartView.animationOptions = ChartView.NoAnimation; } function changeRefreshRate(rate) { refreshTimer.interval = 1 / Number(rate) * 1000; } }

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