CODEWITHSUNDEEP
javaswingjava-2d
ranieribt
ranieribt

Reputation: 1306

How to know when all Java2D rendering is finished, after a repaint() call?

I have a standard paintComponent() method that draw some shapes on a Swing JPanel, via Java2D.

Initially, the JPanel surface is displayed with a clean white background.

After the user select a file, I build the shapes (in a separated thread) based on the instructions on the file.

Then, I call JPanel's rapaint() method, you know, will be handled at the EDT.

I can tell when the repaint() processing ends: I just need to look at the new drawings on the screen.

So, this morning I don't have many ideas to answer THE QUESTION: how to know the same information via code?

Upvotes: 0

Views: 232

Answers (1)

lbalazscs
lbalazscs

Reputation: 17794

You don't have any automatic notification, but you can set a boolean variable or call a method at the end of your paintComponent().

Note that normally you should not have this problem, because paintComponent() is supposed to contain only code that executes fast, any initialization/calculation should be moved to another method.

Upvotes: 2

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