When I set the vgap property on a GridPane, the vagap is supposed to be added only between adjacent rows. It seems to be a bug that is adding extra space before the first row that is equal to the vgap setting. The hgap property is working fine.

I used JDK8 build62. Please run the following program for an example.


package test;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class GridPaneHVGaps extends Application {
public static void main(String[] args) {
Application.launch(args);
}

    public void start(Stage stage) {
GridPane root = new GridPane();
                
                // Make the grid lines visible
                root.setGridLinesVisible(true);
                                
                // Set hgap=5px and vgap=10px
                //root.setHgap(5);
                root.setVgap(10);
                                
                // Add four buttons: two in each of the two rows
root.addRow(1, new Button("One"), new Button("Two"));
                root.addRow(2, new Button("Three"), new Button("Four"));
                root.addRow(3, new Button("Five"), new Button("Six"));
                
                root.setStyle("-fx-padding: 10");

Scene scene = new Scene(root);
stage.setScene(scene);
stage.setTitle("GridPane hgap and vgap Properties");
stage.show();
}
}