Ptv.XServer.Controls.Map.Canvases Namespace |
A canvas holds the graphic items of a map. One or more canvases are used for a layer. There are two main types
of canvases: A WorldCanvas, whose elements have positions and dimensions in world Mercator units
and a ScreenCanvas, whose elements have positions and dimensions in screen (pixel) units. By
using multiple canvases, the elements for different layers can interleave for different
CanvasCategory types.
Classes| Class | Description | |
|---|---|---|
 | MapCanvas | The main canvas which holds viewable elements for a map. |
| ScreenCanvas |
Canvas with screen coordinates. Elements of the canvas have an absolute dimension (= size in pixels) but have
to be repositioned whenever the viewport changes.
|
| WorldCanvas |
Canvas with world coordinates. Elements of the canvas do not have to be repositioned when the viewport changes,
but have world-dimension (= size in Mercator units).
|
Enumerations| Enumeration | Description | |
|---|---|---|
 | CanvasCategory |
The enumeration defines the category of map canvases. The categories specify the primary z-order of canvases on
the map. All canvases within the same category are grouped according to their index in the layer collection.
|
| UpdateMode | Indicates the mode of the update. |