org.opengis.go.display.canvas

Interface CanvasController

All Known Subinterfaces:

Map2DController

public interface CanvasController

The CanvasController interface serves as the token in the CanvasController <--> Canvas interaction. When the Canvas enables a CanvasHandler, it calls handlerEnabled(CanvasController) on the CanvasHandler. The CanvasController may then be used by the programmer to set some of the properties of the associated Canvas. The CanvasController will be active until another CanvasHandler is enabled.

The CanvasController's methods (in an implementation-specific interaction with the Canvas) should only set the Canvas's properties IFF the CanvasController is recognized to be the active controller (the controller given out by the canvas when the most recent handler was enabled).

Method Summary

Modifier and Type	Method and Description
void	setCenter(DirectPosition newCenter) Sets the position of the center pixel of the Canvas this controller works for, if it is the active controller.

Method Detail

setCenter

void setCenter(DirectPosition newCenter)

Sets the position of the center pixel of the Canvas this controller works for, if it is the active controller.

See Also:

CanvasState.getCenter()