How the fill mode does work in GridPane ColumnConstraints?

The following code uses a column constraint to specify that a column of labels should extend horizontally in their cells, but they are not as you can see by looking at their border. My error or a bug?

import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;


public class GridFillExample extends Application {


    @Override
    public void start(Stage primaryStage) throws Exception {
        final Scene scene = new Scene(buildForm());
        scene.getStylesheets().add(getClass().getResource("controls-test.css").toExternalForm());
        primaryStage.setScene(scene);
        primaryStage.setTitle(getClass().getSimpleName());
        primaryStage.sizeToScene();
        primaryStage.show();
    }


    private Parent buildForm() {
        final GridPane grid = new GridPane();
        final ColumnConstraints cc = new ColumnConstraints();
        cc.setFillWidth(true);
        cc.setHalignment(HPos.RIGHT);
        grid.getColumnConstraints().add(cc);
        int row = 0;
        grid.addRow(row++, formLabel("Short"), new TextField());
        grid.addRow(row++, formLabel("Very, very long"), new TextField());
        return grid;
    }


    private static Node formLabel(String text) {
        final Label label = new Label(text + ":");
        label.setStyle("-fx-border-style:solid");
        return label;
    }


    public static void main(String[] args) {
        launch(args);
    }
}

Nodes cannot exceed their maxWidth. Add

label.setMaxWidth(Double.POSITIVE_INFINITY);

in the formLabel (...) method and it will work as expected.

Tags: Java

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