• VBox按照垂直顺序从上到下排列其子节点
• 改变窗口大小,不会该部整体布局
• 窗口太小会遮住内部元素，不会产生滚动条
  

常用属性

alignment

对齐方式

参考枚举值：

new VBox().setAlignment(Pos.TOP_CENTER);

public enum Pos {

    /**
     * Represents positioning on the top vertically and on the left horizontally.
     */
    TOP_LEFT(TOP, LEFT),

    /**
     * Represents positioning on the top vertically and on the center horizontally.
     */
    TOP_CENTER(TOP, HPos.CENTER),

    /**
     * Represents positioning on the top vertically and on the right horizontally.
     */
    TOP_RIGHT(TOP, RIGHT),

    /**
     * Represents positioning on the center vertically and on the left horizontally.
     */
    CENTER_LEFT(VPos.CENTER, LEFT),

    /**
     * Represents positioning on the center both vertically and horizontally.
     */
    CENTER(VPos.CENTER, HPos.CENTER),

    /**
     * Represents positioning on the center vertically and on the right horizontally.
     */
    CENTER_RIGHT(VPos.CENTER, RIGHT),

    /**
     * Represents positioning on the bottom vertically and on the left horizontally.
     */
    BOTTOM_LEFT(BOTTOM, LEFT),

    /**
     * Represents positioning on the bottom vertically and on the center horizontally.
     */
    BOTTOM_CENTER(BOTTOM, HPos.CENTER),

    /**
     * Represents positioning on the bottom vertically and on the right horizontally.
     */
    BOTTOM_RIGHT(BOTTOM, RIGHT),

    /**
     * Represents positioning on the baseline vertically and on the left horizontally.
     */
    BASELINE_LEFT(BASELINE, LEFT),

    /**
     * Represents positioning on the baseline vertically and on the center horizontally.
     */
    BASELINE_CENTER(BASELINE, HPos.CENTER),

    /**
     * Represents positioning on the baseline vertically and on the right horizontally.
     */
    BASELINE_RIGHT(BASELINE, RIGHT);

spacing

定义子节点之间的垂直间距

new VBox().setSpacing(20);

children

包含所有子节点的列表，通常使用 getChildren().add(node) 方法添加元素

new VBox().getChildren().add(new Label("label1"));

margin

子节点边距

VBox.setMargin(vbox.getChildren().get(0), new Insets(10, 20, 30, 40));

padding

容器边缘与其子节点之间的距离

new VBox().setPadding(new Insets(5, 10, 5, 10));

vgrow

设置额外的垂直空间填充属性，子节点可以用Pane来体现

VBox.setVgrow(vbox.getChildren().get(0), Priority.ALWAYS);

实现方式

Java实现

 VBox vbox = new VBox();
 // 设置子节点间的垂直间距
  vbox.setSpacing(20);
  // 设置子节点在VBox中对齐方式
  vbox.setAlignment(Pos.TOP_CENTER);

  vbox.getChildren().add(new Label("label1"));
  for (int i = 0; i < 5; i++) {
      vbox.getChildren().add(new Button("Button " + (i + 1)));
  }
  Scene scene = new Scene(vbox, 400, 300);

Xml实现

<VBox xmlns:fx="http://javafx.com/fxml" fx:controller="org.a.b.c.d.fx.demo.HelloController" alignment="BASELINE_CENTER"
      spacing="20">
    <Label fx:id="welcomeText"/>
    <Button text="Hello!" onAction="#onHelloButtonClick"/>
    <Button text="按钮1"/>
    <Button text="按钮2"/>
    <Button text="按钮3"/>
    <Button text="按钮4"/>
    <Button text="按钮5"/>
</VBox>

综合案例

// 边框线
BorderStroke borderStroke = new BorderStroke(Color.RED, BorderStrokeStyle.SOLID, new CornerRadii(5), new BorderWidths(1));
Border border = new Border(borderStroke);

VBox vbox = new VBox();
// 设置子节点间的垂直间距
vbox.setSpacing(10);
// 设置子节点在VBox中对齐方式
vbox.setAlignment(Pos.TOP_CENTER);

Label label = new Label("label1");
label.setBorder(border);
VBox.setMargin(label, new Insets(10, 40, 10, 40));
vbox.getChildren().add(label);

for (int i = 0; i < 5; i++) {
    Pane pane = new Pane();
    pane.setId("pane_" + i);
    pane.setMinHeight(20);
    pane.setBorder(border);
    // 设置Pane边距
    VBox.setMargin(pane, new Insets(5, 20, 5, 20));
    vbox.getChildren().add(pane);
}

// 设置margin
int num = vbox.getChildren().size();
// 最后一个节点填充剩余空间
VBox.setVgrow(vbox.getChildren().get(num - 1), Priority.ALWAYS);