CODEWITHSUNDEEP
javajavafx
user1406177
user1406177

Reputation: 1370

JavaFX - Fast changing data, GUI update too slow

I have a program that does some kind of calculation on an external computer. That program sends information about its progress which is then shown in a GUI. It roughly works like this:

public void receiveData(final int step, final double errorRate)
{
    Platform.runLater(new Runnable()
    {
        @Override
        public void run()
        {
            stepLabel.setText(""+step);
            errorLabel.setText(""+errorRate);
        }
    }
}

By the system output on the external computer, I can see that the program performs its calculation very fast. The GUI on the other hand shows program not fast enough. When the calculation is done, I can still see the values changing because the queue at Platform.runLater() still contains runnables with updates.

How can I fasten the changes?

What also would be a good soluation is that if the GUI does not show every single change in values if its not fast enough. I.e., if there is a Runnable in queue at Platform.runLater() for step 200, but receiveData() receives a value for 201, the value for 200 doesn't need to be shown because it already is obsolete.

Upvotes: 1

Views: 847

Answers (1)

Andrey Chaschev
Andrey Chaschev

Reputation: 16476

You can apply throttling technique - put your messages into a queue and each 300ms choose the latest or aggregated/average value. This would avoid too many scheduled runnables and updates for the UI.

This method is present in RX* frameworks, i.e. in RxJS, but seems not yet being available in RxJava.

Upvotes: 2

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