/**
* Computes actual grid specification (origin + single cell width and height) in the absolute
* coordinate system. Note, in contrast to {@link #getRelativeGridSpec(EditPartViewer)} this
* specification depends on the active zoom or scroll and can't be cached by clients.
*
* @param viewer
* @return absolute grid specification, or <code>null</code> if grid is not enabled
*/
public static PrecisionRectangle getAbsoluteGridSpec(EditPartViewer viewer) {
PrecisionRectangle spec = getRelativeGridSpec(viewer);
if (spec != null) {
GraphicalEditPart diagramEP = (GraphicalEditPart) viewer.getContents();
diagramEP.getContentPane().translateToAbsolute(spec);
}
return spec;
}
/**
* Always returns the same instance to avoid endless creation
*
* @return active grid specification in absolute coordinates or <code>null</code> if not enabled
*/
public PrecisionRectangle getAbsoluteGridSpec() {
PrecisionRectangle result = getRelativeGridSpec();
if (result == null) {
return null;
}
if (myAbsoluteGridSpec == null) {
myAbsoluteGridSpec = new PrecisionRectangle();
}
myAbsoluteGridSpec.setPreciseBounds(
result.preciseX(), result.preciseY(), result.preciseWidth(), result.preciseHeight());
GraphicalEditPart diagramEP = (GraphicalEditPart) myViewer.getContents();
diagramEP.getContentPane().translateToAbsolute(myAbsoluteGridSpec);
return myAbsoluteGridSpec;
}
/*
* (non-Javadoc)
* @see
* org.eclipse.gef.editpolicies.XYLayoutEditPolicy#getMinimumSizeFor(org
* .eclipse.gef.GraphicalEditPart)
*/
@Override
protected Dimension getMinimumSizeFor(final GraphicalEditPart child) {
return child.getContentPane().getMinimumSize();
}