Skip to content

AdornmentOverlay

Namespace: ThinkGeo.UI.Android

public class AdornmentOverlay : Overlay, System.IDisposable

Inheritance ObjectOverlayBaseOverlayAdornmentOverlay
Implements IDisposable

Properties

IsEmpty

This property indicates whether this overlay is empty or not.

public bool IsEmpty { get; }

Property Value

Boolean
true if this instance is empty; otherwise, false.

Remarks:

This property enhances the performance of the overlay while drawing. If is true, we will skip drawing this overlay and continue drawing the next overlay.

Layers

This property gets a collection of the AdornmentLayers that are added to the AdornmentOverlay.

public GeoCollection<AdornmentLayer> Layers { get; }

Property Value

GeoCollection<AdornmentLayer>

        A collection of AdornmentLayers that are added to the
        AdornmentOverlay to be drawn.

OverlayView

Gets or sets the overlay view.

public MapLayout OverlayView { get; set; }

Property Value

MapLayout
The overlay view.

IsVisible

public bool IsVisible { get; set; }

Property Value

Boolean

Name

Gets or sets the name of this overaly.

public string Name { get; set; }

Property Value

String

DrawingExceptionMode

This property gets and sets the DrawingExceptionMode used when an exception occurs during drawing.

public DrawingExceptionMode DrawingExceptionMode { get; set; }

Property Value

DrawingExceptionMode
The drawing exception mode.

MapArguments

Gets or sets the map arguments.

public MapArguments MapArguments { get; set; }

Property Value

MapArguments
The map arguments.

Attribution

Gets or sets the attribution.

public string Attribution { get; set; }

Property Value

String
The attribution.

DrawingQuality

Gets or sets the drawingQuality for this overlay.

public DrawingQuality DrawingQuality { get; set; }

Property Value

DrawingQuality

Opacity

Gets or sets the opacity for this overlay.

public double Opacity { get; set; }

Property Value

Double

Constructors

AdornmentOverlay()

Initializes a new instance of the AdornmentOverlay class.

public AdornmentOverlay()

Methods

InitializeCore(MapArguments)

This method initializes overlay object.

protected void InitializeCore(MapArguments mapArguments)

Parameters

mapArguments MapArguments
This parameter maintains current map information for calculating mechanism.

Remarks:

When implementing this method, consider initializing the overlay canvas such as setting its z-index, setting current map reference to the CurrentMap property.

DrawCore(MapArguments, OverlayRefreshType)

This method draws the overlay with the provided extent in world coordinate.

protected void DrawCore(MapArguments mapArguments, OverlayRefreshType refreshType)

Parameters

mapArguments MapArguments
This parameter maintains current map information for calculating mechanism.

refreshType OverlayRefreshType
This parameter indicates whether the elements of this overlay needs to be refreshed. For example, TileOverlay is formed by tiles. When panning the map around, the existing tile doesn't need to be redraw, the only thing we need to do is modifying the position of these tiles. On another hand, when click to change the style of the overlay, we need to redraw the tile images to change the appearance. So we need refresh mode.

Dispose(Boolean)

Releases unmanaged and - optionally - managed resources.

protected void Dispose(bool disposing)

Parameters

disposing Boolean
true to release both managed and unmanaged resources; false to release only unmanaged resources.

Events

DrawingException

Occurs before exception is drawing on map.

public event EventHandler<DrawingExceptionOverlayEventArgs> DrawingException;

DrawnException

Occurs after exception is drawn on map.

public event EventHandler<DrawnExceptionOverlayEventArgs> DrawnException;

Drawing

This event raises before the overlay is drawing.

public event EventHandler<DrawingOverlayEventArgs> Drawing;

Drawn

This event raises after the overlay is drawn.

public event EventHandler<DrawnOverlayEventArgs> Drawn;