Qml Custom Legend

This application shows you how to create your own custom legend instead of using the built-in legend of ChartView API.

The main view of the application shows a stacked area chart. This is how one of the stacked areas is created. See ChartViewStacked.qml and AnimatedAreaSeries.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.

Customizing Legends

 AnimatedAreaSeries {
     id: municipalSeries
     name: "municipal"
     axisX: axisX
     axisY: axisY
     borderWidth: 0
     upperSeries: LineSeries {
         id: municipalUpper
         XYPoint { x: 2006; y: 33119 + 13443 }
         XYPoint { x: 2007; y: 37941 + 15311 }
         XYPoint { x: 2008; y: 40122 + 16552 }
         XYPoint { x: 2009; y: 38991 + 17904 }
         XYPoint { x: 2010; y: 34055 + 17599 }
         XYPoint { x: 2011; y: 34555 + 19002 }
         XYPoint { x: 2012; y: 38991 + 19177 }
     }
     lowerSeries: stateUpper
 }

Hovering with mouse on top of the legend will highlight the hovered series. (see CustomLegend.qml).

 Row {
     id: legendRow
     anchors.centerIn: parent
     spacing: 10

     Repeater {
         id: legendRepeater
         model: seriesCount
         delegate: legendDelegate
     }
 }
 Component {
     id: legendDelegate
     Rectangle {
         id: rect
     ...
         MouseArea {
             id: mouseArea
             anchors.fill: parent
             hoverEnabled: true
             onEntered: {
                 rect.gradient = buttonGradientHovered;
                 legend.entered(label.text);
             }
             onExited: {
                 rect.gradient = buttonGradient;
                 legend.exited(label.text);
                 marker.opacity = 0.3;
                 marker.height = 10;
             }
             onClicked: {
                 legend.selected(label.text);
                 marker.opacity = 1.0;
                 marker.height = 12;
             }
         }

You can also select one of the stacked areas for a closer look as a line series by a mouse click (see ChartViewHighlighted.qml).

 ChartView {
     id: chartViewHighlighted
     title: ""
     property variant selectedSeries
     signal clicked
     legend.visible: false
     margins.top: 10
     margins.bottom: 0
     antialiasing: true

     LineSeries {
         id: lineSeries

         axisX: ValueAxis {
             min: 2006
             max: 2012
             labelFormat: "%.0f"
             tickCount: 7
         }
         axisY: ValueAxis {
             id: axisY
             titleText: "EUR"
             min: 0
             max: 40000
             labelFormat: "%.0f"
             tickCount: 5
         }
     }

Example project @ code.qt.io