/** Moves the target control on top of the dummy control. */ public void layout() { if (getTargetControl() == null) { return; } // Compute the unclipped bounds of the target in display coordinates Rectangle displayBounds = Geometry.toDisplay(control.getParent(), control.getBounds()); // Clip the bounds of the target so that it doesn't go outside the dummy control's parent Rectangle clippingRegion = DragUtil.getDisplayBounds(control.getParent()); displayBounds = displayBounds.intersection(clippingRegion); // Compute the bounds of the target, in the local coordinate system of its parent Rectangle targetBounds = Geometry.toControl(getTargetControl().getParent(), displayBounds); // Move the target getTargetControl().setBounds(targetBounds); }