Qt 5.9 | Qt Charts | Qml Polar Chart | View2.qml Example File

Qt 5.9.9 Reference Documentation

# View2.qml Example File

qmlpolarchart/qml/qmlpolarchart/View2.qml

      /****************************************************************************
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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 2.0

      Item {
          anchors.fill: parent

          PolarChartView {
              title: "Historical Area Series"
              anchors.fill: parent
              legend.visible: false
              antialiasing: true

              DateTimeAxis {
                  id: axis1
                  format: "yyyy MMM"
                  tickCount: 13
              }
              ValueAxis {
                  id: axis2
              }
              LineSeries {
                  id: lowerLine
                  axisAngular: axis1
                  axisRadial: axis2

                  // Please note that month in JavaScript months are zero based, so 2 means March
                  XYPoint { x: toMsecsSinceEpoch(new Date(1950, 0, 1)); y: 15 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1962, 4, 1)); y: 35 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1970, 0, 1)); y: 50 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1978, 2, 1)); y: 75 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1987, 11, 1)); y: 102 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1992, 1, 1)); y: 132 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1998, 7, 1)); y: 100 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2002, 4, 1)); y: 120 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2012, 8, 1)); y: 140 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2013, 5, 1)); y: 150 }
              }
              LineSeries {
                  id: upperLine
                  axisAngular: axis1
                  axisRadial: axis2

                  // Please note that month in JavaScript months are zero based, so 2 means March
                  XYPoint { x: toMsecsSinceEpoch(new Date(1950, 0, 1)); y: 30 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1962, 4, 1)); y: 55 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1970, 0, 1)); y: 80 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1978, 2, 1)); y: 105 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1987, 11, 1)); y: 125 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1992, 1, 1)); y: 160 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(1998, 7, 1)); y: 140 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2002, 4, 1)); y: 140 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2012, 8, 1)); y: 170 }
                  XYPoint { x: toMsecsSinceEpoch(new Date(2013, 5, 1)); y: 200 }
              }
              AreaSeries {
                  axisAngular: axis1
                  axisRadial: axis2
                  lowerSeries: lowerLine
                  upperSeries: upperLine
              }
          }
          // DateTimeAxis is based on QDateTimes so we must convert our JavaScript dates to
          // milliseconds since epoch to make them match the DateTimeAxis values
          function toMsecsSinceEpoch(date) {
              var msecs = date.getTime();
              return msecs;
          }
      }