Force immediate paint in JavaFX

Question

Is there a way to force a JavaFX app to repaint itself before proceeding? Similar to a Swing Panel\'s paint(Graphic g) method (I might be getting the keywords wrong there).<

Answer 1

You are right. JavaFX is event-driven and single-threaded. This means that repaint and event response can not be done simultaneously. Long-running task should be executed on separate thread so they do not block the rendering of the UI, When the task is finished it can sync back to the FX thread by calling FX.deferAction() which will simply execute the code on the main thread.

Answer 2

This won't be the most helpful answer as I have toyed around with JavaFX for all of half a day, but wouldn't you use Timelines, Keyframes, and binding to accomplish your repaints instead of calling them explicitly like you have described?

See this tutorial for an example.

Answer 3

JavaFX's model is to separate you from the painting of the "stuff" on the screen. This is very powerful but is a change from how you might be familiar with.

whaley is correct that the appropriate way of doing this in JavaFX is to make a timeline where the move is done every X seconds and will be drawn at that keyframe.

If you have a question about how to do this, try it and make a new question with some code.