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

Zooms the map to fit the area that contains items sent as a parameter.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v21.2.dll

NuGet Packages: DevExpress.Win.Design, DevExpress.Win.Map

Declaration

C#

public void ZoomToFit(
    IEnumerable<MapItem> items,
    double paddingFactor
)

VB.NET

Public Sub ZoomToFit(
    items As IEnumerable(Of MapItem),
    paddingFactor As Double
)

Parameters

Name	Type	Description
items	IEnumerable<MapItem>	A IEnumerable object that contains MapItem descendant objects that should be visible on a map after it is zoomed.
paddingFactor	Double	A Double object, which tunes the border size around visible map items.

Remarks

When vector items are loaded at runtime, the ZoomToFit method should be called from LayerBase.DataLoaded event handler.

The ZoomToFit method works as follows:

• Calculates a bounding box around items.

  

• Zooms the map to fit the box. Note that the padding factor is applied to the larger dimension of the box.

  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.

Example

The following image shows a map with paddingFactor equal to 0.3:

C#

map.ZoomToFit(mapItemStorage.Items, 0.3);

VB.NET

map.ZoomToFit(mapItemStorage.Items, 0.3)

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ZoomToFit(IEnumerable<MapItem>, Double) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

winforms-map-get-geo-point-info-from-bing-geocode-service/CS/RequestLocationInformation/Form1.cs#L95

private void OnLayerItemsGenerating(object sender, LayerItemsGeneratingEventArgs e) {
    mapControl.ZoomToFit(e.Items, 0.4);
}

VB.NET

winforms-map-get-geo-point-info-from-bing-geocode-service/VB/RequestLocationInformation/Form1.vb#L102

Private Sub OnLayerItemsGenerating(ByVal sender As Object, ByVal e As LayerItemsGeneratingEventArgs)
    mapControl.ZoomToFit(e.Items, 0.4)
End Sub