MapControl.ZoomToFit(IEnumerable<MapItem>, Boolean, Double) Method

Zooms the map based on a specified padding factor to allow the map viewport to display all items passed in parameters. Allows you to set whether the map should use a non-negative integer zoom level.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v23.2.dll

NuGet Package: DevExpress.Wpf.Map

Declaration

C#

public void ZoomToFit(
    IEnumerable<MapItem> items,
    bool roundZoomLevel,
    double paddingFactor = 0.15
)

VB.NET

Public Sub ZoomToFit(
    items As IEnumerable(Of MapItem),
    roundZoomLevel As Boolean,
    paddingFactor As Double = 0.15
)

Parameters

Name	Type	Description
items	IEnumerable<MapItem>	Items that should be displayed in the map viewport.
roundZoomLevel	Boolean	Specifies whether to round the zoom level value.

Optional Parameters

Name	Type	Default	Description
paddingFactor	Double	0.15	Specifies the size of the border around displayed map items.

Remarks

The padding factor is applied to the larger dimension of the bounding box that contains visible items.

The following image shows an instance of a horizontal dimension that is larger than the vertical (“PF” means “Padding Factor” on images):

When the vertical dimension is larger than the horizontal, the zoom appears as follows:

Note that the padding factor is divided by two for each side of the region.

The following code zooms the map to display specified items:

XAML

<dxm:MapControl x:Name="mapControl">
    <dxm:ImageLayer>
        <dxm:BingMapDataProvider BingKey="Insert your Bing Key here." 
                                 Kind="RoadGray"/>
    </dxm:ImageLayer>
    <dxm:VectorLayer>
        <dxm:MapItemStorage x:Name="mapItemStorage">
            <dxm:MapDot Location="51.30, 0.07" Size="20" Fill="Wheat"/>
            <dxm:MapDot Location="52.31, 13.23" Size="20" Fill="Gold"/>
            <dxm:MapDot Location="48.51, 2.21" Size="20" Fill="CadetBlue"/>
            <dxm:MapDot Location="41.54, 12.3" Size="20" Fill="Red"/>
            <dxm:MapDot Location="40.23, -3.43" Size="20" Fill="Green"/>
        </dxm:MapItemStorage>
    </dxm:VectorLayer>
</dxm:MapControl>

C#

private void OnWindowLoaded(object sender, RoutedEventArgs e) {
    mapControl.ZoomToFit(items: mapItemStorage.DisplayItems, roundZoomLevel: true, paddingFactor: 0.15);
}

VB.NET

Private Sub OnWindowLoaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
    mapControl.ZoomToFit(items:=mapItemStorage.DisplayItems, roundZoomLevel:=True, paddingFactor:=0.15)
End Sub