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MapPie Class

The class used to draw a pie chart on a map.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v21.2.dll

Declaration

public class MapPie :
    MapChartItemBase,
    IMapChartItem,
    IMapChartDataItem,
    IMapValueDataItem,
    IMapDataItem,
    IMapContainerDataItem,
    IClusterItem,
    IClusterItemCore,
    IClusterable

The following members accept/return MapPie objects:

Remarks

The following image shows an example of a map pie chart.

MapPie_Example

Examples

The following markup shows how to draw a sample pie chart on a map:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:DXMapExample"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map" 
        x:Class="DXMapExample.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="800" Width="800">
    <Grid>
            <dxm:MapControl>
                <!-- Create a background image layer if necessary. -->
                <dxm:ImageLayer>
                    <dxm:BingMapDataProvider BingKey="Insert your Bing Key." 
                                             Kind="RoadLight"/>
                </dxm:ImageLayer>

                <!-- Add a vector layer that will store map pies. -->
                <dxm:VectorLayer>
                    <dxm:MapItemStorage x:Name="mapItemStorage">
                        <dxm:MapPie Location="48.8566, 2.3522" 
                                    HoleRadiusPercent="50" 
                                    Size="30" 
                                    RotationAngle="90">
                            <dxm:MapPie.Segments>
                                <dxm:PieSegment Value="20" Fill="Red" SegmentId="2"/>
                                <dxm:PieSegment Value="30" Fill="Green" SegmentId="0"/>
                                <dxm:PieSegment Value="50" Fill="Yellow" SegmentId="1"/>
                            </dxm:MapPie.Segments>
                        </dxm:MapPie>
                        <!-- Add other items here. -->
                    </dxm:MapItemStorage>
                </dxm:VectorLayer>
            </dxm:MapControl>
    </Grid>
</Window>

The example below shows how to create a pie chart and add it to a map in code:

using System.Windows;
using System.Windows.Media;
using DevExpress.Xpf.Map;

namespace DXMapExample {

        private void Window_Loaded(object sender, RoutedEventArgs e) {
            MapPie mapPie = new MapPie();

            mapPie.Location = new GeoPoint(48.8566, 2.3522);
            mapPie.HoleRadiusPercent = 50;
            mapPie.Size = 30;
            mapPie.RotationAngle = 90;

            mapPie.Segments.Add(new PieSegment { SegmentId = 2, Value = 20, Fill = Brushes.Red });
            mapPie.Segments.Add(new PieSegment { SegmentId = 0, Value = 30, Fill = Brushes.Green });
            mapPie.Segments.Add(new PieSegment { SegmentId = 1, Value = 50, Fill = Brushes.Yellow });

            mapItemStorage.Items.Add(mapPie);
        }
    }
}

See also the following example on how to generate map pies based on a data source: How to: Automatically Generate Pie Chart Items from a Datasource.

Implements

See Also