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 |
void |
setCenter(DirectPosition newCenter)
Sets the position of the center pixel of the Canvas this
controller works for, if it is the active controller. |
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()
Copyright © 1994-2008 Open Geospatial Consortium. All Rights Reserved.