JavaFX：如何在第一次显示ListView之前计算ListCell的坐标

Question

I need a solution to get the coordinates from a ListCell of a ListView before the listView is displayed the first time. Because, I have to move a Stage (contains the ListView ) which depends on these coordinates.

Answer 1

Before stage is shown, no one node is allocated (as far as I remember, mostly - performance concern).

So, actual sizes and positions don't exist until content is rendered at the first time. So, to move the stage properly, you should add listeners on properties, describing position, and move stage on position changes.

Or move stage later, on some other event (mouse click, or smth else), when you can be sure, that coordinates exist and determined correctly.