Qt 5.11 | Qt Charts | Qt Charts Examples | Qml Charts Example

Qt Charts | Commercial or GPLv3

# Qml Charts Example

This basic demonstration shows how to use the different chart types by using qml.

## Running the Example

To run the example from Qt Creator, open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.

## Creating Charts Using QML

Creating each chart type begins with the creation of a ChartView.

To create a pie, we use the PieSeries API together with a few PieSlices:

      ChartView {
          id: chart
          title: "Top-5 car brand shares in Finland"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          PieSeries {
              id: pieSeries
              PieSlice { label: "Volkswagen"; value: 13.5 }
              PieSlice { label: "Toyota"; value: 10.9 }
              PieSlice { label: "Ford"; value: 8.6 }
              PieSlice { label: "Skoda"; value: 8.2 }
              PieSlice { label: "Volvo"; value: 6.8 }
          }
      }

      Component.onCompleted: {
          // You can also manipulate slices dynamically, like append a slice or set a slice exploded
          othersSlice = pieSeries.append("Others", 52.0);
          pieSeries.find("Volkswagen").exploded = true;
      }

To create a chart with a line series:

      ChartView {
          title: "Line"
          anchors.fill: parent
          antialiasing: true

          LineSeries {
              name: "LineSeries"
              XYPoint { x: 0; y: 0 }
              XYPoint { x: 1.1; y: 2.1 }
              XYPoint { x: 1.9; y: 3.3 }
              XYPoint { x: 2.1; y: 2.1 }
              XYPoint { x: 2.9; y: 4.9 }
              XYPoint { x: 3.4; y: 3.0 }
              XYPoint { x: 4.1; y: 3.3 }
          }
      }

And spline series:

      ChartView {
          title: "Spline"
          anchors.fill: parent
          antialiasing: true

          SplineSeries {
              name: "SplineSeries"
              XYPoint { x: 0; y: 0.0 }
              XYPoint { x: 1.1; y: 3.2 }
              XYPoint { x: 1.9; y: 2.4 }
              XYPoint { x: 2.1; y: 2.1 }
              XYPoint { x: 2.9; y: 2.6 }
              XYPoint { x: 3.4; y: 2.3 }
              XYPoint { x: 4.1; y: 3.1 }
          }
      }

Then we create a chart that illustrates the NHL All-Star player selections by using three area series:

      ChartView {
          title: "NHL All-Star Team Players"
          anchors.fill: parent
          antialiasing: true

          // Define x-axis to be used with the series instead of default one
          ValueAxis {
              id: valueAxis
              min: 2000
              max: 2011
              tickCount: 12
              labelFormat: "%.0f"
          }

          AreaSeries {
              name: "Russian"
              axisX: valueAxis
              upperSeries: LineSeries {
                  XYPoint { x: 2000; y: 1 }
                  XYPoint { x: 2001; y: 1 }
                  XYPoint { x: 2002; y: 1 }
                  XYPoint { x: 2003; y: 1 }
                  XYPoint { x: 2004; y: 1 }
                  XYPoint { x: 2005; y: 0 }
                  XYPoint { x: 2006; y: 1 }
                  XYPoint { x: 2007; y: 1 }
                  XYPoint { x: 2008; y: 4 }
                  XYPoint { x: 2009; y: 3 }
                  XYPoint { x: 2010; y: 2 }
                  XYPoint { x: 2011; y: 1 }
              }
          }
          ...

Then a couple of scatter series:

      ChartView {
          title: "Scatters"
          anchors.fill: parent
          antialiasing: true

          ScatterSeries {
              id: scatter1
              name: "Scatter1"
              XYPoint { x: 1.5; y: 1.5 }
              XYPoint { x: 1.5; y: 1.6 }
              XYPoint { x: 1.57; y: 1.55 }
              XYPoint { x: 1.8; y: 1.8 }
              XYPoint { x: 1.9; y: 1.6 }
              XYPoint { x: 2.1; y: 1.3 }
              XYPoint { x: 2.5; y: 2.1 }
          }

          ScatterSeries {
              name: "Scatter2"
          ...

And a few different bar series:

      ChartView {
          title: "Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          BarSeries {
              id: mySeries
              axisX: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

      ChartView {
          title: "Stacked Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          StackedBarSeries {
              id: mySeries
              axisX: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

      ChartView {
          title: "Percent Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          PercentBarSeries {
              axisX: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

      ChartView {
          title: "Horizontal Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          HorizontalBarSeries {
              axisY: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

      ChartView {
          title: "Horizontal Stacked Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          HorizontalStackedBarSeries {
              axisY: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

      ChartView {
          title: "Horizontal Percent Bar series"
          anchors.fill: parent
          legend.alignment: Qt.AlignBottom
          antialiasing: true

          HorizontalPercentBarSeries {
              axisY: BarCategoryAxis { categories: ["2007", "2008", "2009", "2010", "2011", "2012" ] }
              BarSet { label: "Bob"; values: [2, 2, 3, 4, 5, 6] }
              BarSet { label: "Susan"; values: [5, 1, 2, 4, 1, 7] }
              BarSet { label: "James"; values: [3, 5, 8, 13, 5, 8] }
          }
      }

And finally an example demonstrating how to create a donut chart with two pie series:

      ChartView {
          id: chart
          title: "Production costs"
          anchors.fill: parent
          legend.visible: false
          antialiasing: true

          PieSeries {
              id: pieOuter
              size: 0.96
              holeSize: 0.7
              PieSlice { id: slice; label: "Alpha"; value: 19511; color: "#99CA53" }
              PieSlice { label: "Epsilon"; value: 11105; color: "#209FDF" }
              PieSlice { label: "Psi"; value: 9352; color: "#F6A625" }
          }

          PieSeries {
              size: 0.7
              id: pieInner
              holeSize: 0.25

              PieSlice { label: "Materials"; value: 10334; color: "#B9DB8A" }
              PieSlice { label: "Employee"; value: 3066; color: "#DCEDC4" }
              PieSlice { label: "Logistics"; value: 6111; color: "#F3F9EB" }

              PieSlice { label: "Materials"; value: 7371; color: "#63BCE9" }
              PieSlice { label: "Employee"; value: 2443; color: "#A6D9F2" }
              PieSlice { label: "Logistics"; value: 1291; color: "#E9F5FC" }

              PieSlice { label: "Materials"; value: 4022; color: "#F9C36C" }
              PieSlice { label: "Employee"; value: 3998; color: "#FCE1B6" }
              PieSlice { label: "Logistics"; value: 1332; color: "#FEF5E7" }
          }
      }

      Component.onCompleted: {
          // Set the common slice properties dynamically for convenience
          for (var i = 0; i < pieOuter.count; i++) {
              pieOuter.at(i).labelPosition = PieSlice.LabelOutside;
              pieOuter.at(i).labelVisible = true;
              pieOuter.at(i).borderWidth = 3;
          }
          for (var i = 0; i < pieInner.count; i++) {
              pieInner.at(i).labelPosition = PieSlice.LabelInsideNormal;
              pieInner.at(i).labelVisible = true;
              pieInner.at(i).borderWidth = 2;
          }
      }

Additionally, antialiasing is set with the qml property in Qt Quick 2.

Files:

- qmlchart/main.cpp
- qmlchart/qml/qmlchart/MainForm.ui.qml
- qmlchart/qml/qmlchart/View1.qml
- qmlchart/qml/qmlchart/View10.qml
- qmlchart/qml/qmlchart/View11.qml
- qmlchart/qml/qmlchart/View12.qml
- qmlchart/qml/qmlchart/View2.qml
- qmlchart/qml/qmlchart/View3.qml
- qmlchart/qml/qmlchart/View4.qml
- qmlchart/qml/qmlchart/View5.qml
- qmlchart/qml/qmlchart/View6.qml
- qmlchart/qml/qmlchart/View7.qml
- qmlchart/qml/qmlchart/View8.qml
- qmlchart/qml/qmlchart/View9.qml
- qmlchart/qml/qmlchart/main.qml
- qmlchart/qmlchart.pro
- qmlchart/resources.qrc