Sorry for the incomplete question before!
The question is like this,
I want to incorporate popupmenus into a javafx component called Canvas.
Canvas sits on Frame.
var frame = new Frame();
var canvas = new Canvas();
var popupmenus = new PopupMenu();  //inside many menuitems are placed, say.
popupmenus.owner = canvas;
frame.content = canvas;
Now,
canvas.onMouseClicked = operation(e:MouseEvent)
{
popupmenus.visible = true;  //drops down the menus
};

This is perfectly working in the Javafx editor (javafxpad.jnlp). But the same
code when run on Eclipse, misses to open the popupmenus when clicked more
than once on the canvas.
Only when the canvas is refreshed it opens. So, am able to perform only one
operation at a time.Then refresh for the second action to be performed.
Can anyone help on this? Thank you.