JavaFX嵌套GridPane对齐方式

import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.stage.Stage;

public class GridPaneAlignmentExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane root = new GridPane();

        // 创建两个GridPane作为示例
        GridPane nestedGridPane1 = createNestedGridPane();
        GridPane nestedGridPane2 = createNestedGridPane();

        // 设置第一个GridPane的对齐方式为左对齐和顶部对齐
        GridPane.setHalignment(nestedGridPane1, HPos.LEFT);
        GridPane.setValignment(nestedGridPane1, VPos.TOP);

        // 设置第二个GridPane的对齐方式为右对齐和底部对齐
        GridPane.setHalignment(nestedGridPane2, HPos.RIGHT);
        GridPane.setValignment(nestedGridPane2, VPos.BOTTOM);

        // 将两个GridPane添加到根GridPane中
        root.add(nestedGridPane1, 0, 0);
        root.add(nestedGridPane2, 1, 1);

        Scene scene = new Scene(root, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private GridPane createNestedGridPane() {
        GridPane gridPane = new GridPane();

        // 添加一些示例组件到嵌套的GridPane中
        Button button1 = new Button("Button 1");
        Button button2 = new Button("Button 2");

        gridPane.add(button1, 0, 0);
        gridPane.add(button2, 1, 1);

        // 设置行和列的约束，使组件可以正确对齐
        RowConstraints rowConstraints = new RowConstraints();
        rowConstraints.setValignment(VPos.CENTER);
        gridPane.getRowConstraints().addAll(rowConstraints, rowConstraints);

        ColumnConstraints columnConstraints = new ColumnConstraints();
        columnConstraints.setHalignment(HPos.CENTER);
        gridPane.getColumnConstraints().addAll(columnConstraints, columnConstraints);

        return gridPane;
    }

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