ScopeView.qml Example File

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  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the Qt Charts module of the Qt Toolkit.
  **
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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
      onOpenGLChanged: {
          series("signal 1").useOpenGL = openGL;
          series("signal 2").useOpenGL = openGL;
      }

      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;
      }
  }