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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.v24.1.dll

NuGet Package: DevExpress.Win.Map

Declaration

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

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.

    ZoomToFit_DescribedRegion

  • 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).

    ZoomToFit_ZoomedMap

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

    ZoomToFit_VerticalSizeZooming

    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:

ZoomToFit_ZoomExample

map.ZoomToFit(mapItemStorage.Items, 0.3);

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

Note

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See Also