Test for Label overrun

Question

I have a multiline label whose text has a chance of overrunning. If it does this, I want to decrease the font size until it isn't overrunning, or until it hits some minimum size. This would hopefully make it so that the label will change size until the entire string is visible.

My problem it that I am not sure how to test to see if the text has overrun. I have tried testing to see if the label's text ends with the ellipse string, but I believe the ellipse is not technically added to the textProperty of the label. So does anyone know of a good way to test for this?

Answer 1

minisu posted a way to detect an overrun in this answer: https://stackoverflow.com/a/15178908/9492864

This way works for all labeled and I tested it on Buttons with JavaFX 8. You can add a listener for example to the needsLayoutProperty:

labeled.needsLayoutProperty().addListener((observable, oldValue, newValue) -> {
   String originalString = labeled.getText();
   Text textNode = (Text) labeled.lookup(".text"); // "text" is the style class of Text
   String actualString = textNode.getText();

   boolean clipped = !actualString.isEmpty() && !originalString.equals(actualString);

   System.out.println("is " + originalString + " clipped: " + clipped);
});