** I've posted an updated version here that has more advanced resize/move support.
I created my own resizable window component which extends
TitleWindow. It renders a small resize handle in the bottom right corner of the panel which the user can drag to resize the window. To make the window resizable, set the
resizableproperty to true.
The window can also be dragged by the titlebar to move it (assuming that it is the child of a container that uses an absolute layout). To make the window movable, set the
movableproperty to true. Then you'll see a drag handle in the titlebar.
The example below uses the PopUpManager to show the window as a popup (which lets the user move the panel around the screen). You can view the source from the context menu. This window also listens for Enter and Escape keyboard events which both hide the popup. The window is hardcoded to have a min width and height of 20, and a max width/height of the application's width/height.