JavaFX - SplitPane, resize & proportions

Question

How can I achieve proportional resize of whole SplitPane?

public class JfxSplitPaneTest extends Application {
    @Override
    public void start(Stage stage         


        

Answer 1

Try to add Change Listener to stage.widthProperty() and stage.heightProperty(). And call this:

    split.setDividerPositions(0.1f, 0.6f, 0.9f)

Answer 2

The rule of thumb is to use setDividerPositions with Platform.runLater when the resize event is triggered.

You probably want to start with a default ratio, let the user change that ratio, and maintain this ratio whatever it is when there's a resize event. Let's consider a 25/75 vertical FX splitPane in some stage:

splitPane.setDividerPositions(0.25f, 0.75f);
stage.heightProperty().addListener((obs, oldVal, newVal) -> {
    double[] positions = splitPane.getDividerPositions(); // reccord the current ratio
    Platform.runLater(() -> splitPane.setDividerPositions(positions)); // apply the now former ratio
});

Answer 3

Try to set the divisors like AS3Boyan said

split.setDividerPositions(0.1f, 0.6f, 0.9f)

and add this:

How can I avoid a SplitPane to resize one of the panes when the window resizes?