ingrid.yao@Eng 1997-07-29

Problem reported by Oracle:

WM_ACTIVATE processing tries to set the focus to the Component that had the
focus last time the window was activated. WWindowPeer.getFocusPeer() tries to
cast a Component's peer to WComponentPeer, which causes a ClassCastException
for LW Components. The method needs to return the HW ancestor of the LW
Component:

Proposed fix:

    WComponentPeer getFocusPeer() {
        Component c = ((Window)target).getFocusOwner();
        while (c != null) {
            ComponentPeer peer = c.getPeer();
            if (peer != null && peer instanceof WComponentPeer) {
                return (WComponentPeer) peer;
            } else {
                // peerless sub-component, try parent.
                c = c.getParent();
            }
        }
        return null; // no child has focus
    }