This class is the abstract superclass of all dialog trays. A tray can be opened
- See Also:
createContentsCreates the contents (widgets) that will be contained in the tray.
Tray implementions must not set a layout on the parent composite, or assume a particular layout on the parent. The tray dialog will allocate space according to the natural size of the tray, and will fill the tray area with the tray's contents.
parent- the composite that will contain the tray
- the contents of the tray, as a