MapCanvas Class

The main canvas which holds viewable elements for a map.

Inheritance Hierarchy

Namespace: Ptv.XServer.Controls.Map.Canvases
Assembly: Ptv.XServer.Controls.Map (in Ptv.XServer.Controls.Map.dll) Version: 1.7.10.0

Syntax

public abstract class MapCanvas : Canvas, 
	IWeakEventListener

Public MustInherit Class MapCanvas
	Inherits Canvas
	Implements IWeakEventListener

public ref class MapCanvas abstract : public Canvas, 
	IWeakEventListener

[<AbstractClassAttribute>]
type MapCanvas =  
    class
        inherit Canvas
        interface IWeakEventListener
    end

The MapCanvas type exposes the following members.

Constructors

	Name	Description
	MapCanvas	Initializes a new instance of the MapCanvas class. Stores the parent map and adds listeners to the map viewport changed events.

Properties

	Name	Description
	CanvasCategory	Gets or sets the CanvasCategory of the canvas. The canvas category defines the z order of the canvas in the map.
	MapView	Gets the parent map instance.

Methods

	Name	Description
	BeforeUpdate	Callback to precede the updating of the map content.
	CanvasToGeo	Converts a canvas point to a geographic point.
	CanvasToPtvMercator	This method implements a transformation from canvas coordinates to logical coordinates.
	Dispose	Disposes the map canvas. During disposal the children of the canvas are removed and the viewport changed events are disconnected.
	GeoToCanvas(Point)	Converts a geographic point to a canvas point.
	GeoToCanvas(Point, String)	Converts a geographic point to a canvas coordinate.
	PtvMercatorToCanvas	This method implements a transformation from logical coordinates to canvas coordinates.
	ReceiveWeakEvent	Receives events from the centralized event manager.
	Update	Updates the map content. The map content consists of all elements of the canvas. This method is for example triggered when the viewport changes.

Extension Methods

	Name	Description
	FindRelativeT	Finds an object of type T for a framework element which is somewhere in the visual tree. (Defined by MapElementExtensions.)
	ToJson	Converts an object to a JSON string representation. (Defined by JSONWriter.)