public abstract static class MouseUtils.PopupMouseAdapter
The PopupMouseAdapter provides safe way to implement popup menu invocation
mechanism. It should be used instead of invoking the popup in
mouseClicked because the mouseClicked does not work as "often" as
it should (i.e. sometimes it is not called).
PopupMouseAdapter delegates to isPopupTrigger to get correct popup
menu invocation gesture. Clients are supposed to extend this class and
implement showPopup method by adding code that shows popup menu properly.
Please note that older implementation which used treshold is now
deprecated, please use default constructor.
Called when the sequnce of mouse events should lead to actual
showing of the popup menu.
Should be redefined to show the menu.
param evt The mouse release event - should be used to obtain the
position of the popup menu