java JavaFX | StackPane 类

JavaFX | StackPane 类

原文:https://www.geeksforgeeks.org/javafx-stackpane-class/

StackPane 类是 JavaFX 的一部分。StackPane 类以堆栈的形式布局其子类。新节点被放置在堆栈中前一个节点的顶部。StackPane 类继承 窗格类 。

类的构造函数:

堆叠面板():创建一个新的空堆叠面板。
堆叠面板(节点… c) :用指定的节点创建新的堆叠面板。

常用方法:

方法	说明
getAlignment()	返回堆栈的对齐方式。
对齐(节点 c)	返回节点的对齐方式。
获取边距(节点 c)	返回节点的 insets。
设置对齐(节点 n，位置 v)	设置作为堆栈平面一部分的节点的对齐方式。
设置对齐(位置 v)	设置堆栈的对齐方式。
setMargin（Node n， Insets v）	设置作为堆栈平面一部分的节点的边距。

下面的程序说明了 StackPane 类的使用:

Java Program to create a StackPane, add circle, label, rectangle and add it to the stage: In this program we are creating a Label named label, a Rectangle named rectangle and a Circle named circle. Then set the font of the StackPane using the setFont() function. Now set the fill of the rectangle and circle using the setFill() function. We will then create a StackPane named stack_pane and add rectangle, circle and label. Create a scene and add the stack_pane to the scene. Add this scene to the stage and call the show() function to display the final results.

```java // Java Program to create a StackPane, // add circle, label, rectangle // and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.scene.paint.; import javafx.scene.canvas.; import javafx.scene.text.; import javafx.scene.Group; import javafx.scene.shape.;

public class StackPane_1 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("StackPane");

// create a label             Label label = new Label("this is StackPane example");

// set Font for label             label.setFont(new Font(30));

// create a circle             Circle circle = new Circle(100, 100, 70);

// set fill for the circle             circle.setFill(Color.RED);

// create Rectangle             Rectangle rectangle = new Rectangle(100, 100, 180, 160);

// set fill for rectangle             rectangle.setFill(Color.BLUE);

// create a stack pane             StackPane stack_pane = new StackPane(rectangle, circle, label);

// create a scene             Scene scene = new Scene(stack_pane, 400, 300);

// set the scene             stage.setScene(scene);

stage.show();         }

catch (Exception e) {

System.out.println(e.getMessage());         }     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出:
Java Program to create a StackPane, add the circle, label, rectangle and then set the alignment of the StackPane and add it to the stage: In this program we are creating a Label named label, a Rectangle named rectangle and a Circle named circle. Then set the font of the StackPane using the setFont() function. Set fill of the rectangle and circle using the setFill() function. Now create a StackPane named stack_pane and add rectangle, circle, and label. Set the alignment of the stack_pane using setAlignment() function. Create a scene and add the stack_pane to the scene. Finally add this scene to the stage and call the show() function to display the results.

```java // Java Program to create a StackPane, // add the circle, label, rectangle and // then set the alignment of the StackPane // and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.; import javafx.scene.layout.; import javafx.stage.Stage; import javafx.geometry.; import javafx.scene.paint.; import javafx.scene.canvas.; import javafx.scene.text.; import javafx.scene.Group; import javafx.scene.shape.*;

public class StackPane_2 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("StackPane");

// create a label             Label label = new Label("this is StackPane example");

// set Font for label             label.setFont(new Font(30));

// create a circle             Circle circle = new Circle(100, 100, 70);

// set fill for the circle             circle.setFill(Color.RED);

// create Rectangle             Rectangle rectangle = new Rectangle(100, 100, 180, 160);

// set fill for rectangle             rectangle.setFill(Color.BLUE);

// create a stack pane             StackPane stack_pane = new StackPane(rectangle, circle, label);

// set alignement for the stack pane             stack_pane.setAlignment(Pos.TOP_CENTER);

// create a scene             Scene scene = new Scene(stack_pane, 400, 300);

// set the scene             stage.setScene(scene);

stage.show();         }

catch (Exception e) {

System.out.println(e.getMessage());         }     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出:

注意:上述程序可能无法在联机 IDE 中运行，请使用脱机编译器。

参考:https://docs . Oracle . com/javase/8/JavaFX/API/JavaFX/scene/layout/stack pane . html