MapControl.ZoomToFitLayerItems(IEnumerable<LayerBase>, Double) Method
Zooms the map to fit items contained in the specified set of LayerBase class descendant objects.
Namespace: DevExpress.XtraMap
Assembly: DevExpress.XtraMap.v24.1.dll
NuGet Package: DevExpress.Win.Map
Declaration
Parameters
Name | Type | Description |
---|---|---|
layers | IEnumerable<LayerBase> | A IEnumerable object, containing LayerBase class descendant objects. |
paddingFactor | Double | A Double value, which tunes the border size around visible map items. |
Remarks
When vector items are loaded at runtime, the ZoomToFitLayerItems
method should be called from LayerBase.DataLoaded event handler.
The ZoomToFitLayerItems
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 that is zoomed with paddingFactor equal to 0.3:
using DevExpress.XtraMap;
private void OnVectorLayerDataLoaded(object sender, DataLoadedEventArgs e) {
mapControl1.ZoomToFitLayerItems(new LayerBase[] { vectorLayer }, 0.3);
}