TileStateChangedListener (Geotools modules 34-SNAPSHOT API)

```
public interface TileStateChangedListener
```
A listener for tile state change events.
See net.refractions.uidg.project.render.Tile. Taken from uDig.

Since:

12.0

Author:

Emily Gouge (Refractions Research)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`contextStateChanged(Tile tile)`	Called when the context state of a tile has changed.
`void`	`renderStateChanged(Tile tile)`	Called when the render state of a tile has changed.
`void`	`screenStateChanged(Tile tile)`	Called when the screen state of a tile has changed.
`void`	`validationStateChanged(Tile tile)`	Called when the validation state of a tile has changed.

- Method Detail
  - screenStateChanged
```
void screenStateChanged(Tile tile)
```
    Called when the screen state of a tile has changed.
  - renderStateChanged
```
void renderStateChanged(Tile tile)
```
    Called when the render state of a tile has changed.
  - contextStateChanged
```
void contextStateChanged(Tile tile)
```
    Called when the context state of a tile has changed.
  - validationStateChanged
```
void validationStateChanged(Tile tile)
```
    Called when the validation state of a tile has changed.