java JavaFX | AnchorPane 类

JavaFX | AnchorPane 类

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

AnchorPane 类是 JavaFX 的一部分。锚定窗格允许子节点的边缘锚定到锚定窗格边缘的偏移处。如果锚定窗格设置了边框和/或填充，偏移量将从这些嵌入的内边缘开始测量。AnchorPane 继承 Pane 类。

类的构造函数:

锚定面板():创建新的锚定面板。
锚定面板(节点… c) :创建具有指定节点的锚定面板。

常用方法:

方法	说明
getbottomanchor(节点 c)	返回子级的底部锚点。
getLeftAnchor（Node c）	返回子级的左锚点。
getRightAnchor(节点 c)	返回子级的右锚点。
节点 c	返回子级的顶部锚点。
setbottomanchor(节点 c，双 v)	设置孩子的底部锚点。
设置左锚(节点 c，双 v)	设置孩子的左锚点。
设置右锚(节点 c，双 v)	设置孩子的右锚点。
setTopAnchor(节点 c，双 v)	设置孩子的顶部锚点。

以下程序说明了锚定面板类的使用:

Java Program to create a AnchorPane and add label to it and add label to the stage: In this program we will create a AnchorPane named anchor_pane. Add a Label named label to the anchor_pane and set the top, bottom, left, right using the setTopAnchor(), setBottomAnchor(), setLeftAnchor(), setRightAnchor() functions respectively. Now add the anchor_pane to the Scene. Then finally add the scene to the stage and call the show() function to display the results.

```java // Java Program to create a AnchorPane and // add label to it and add label 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.event.EventHandler; import javafx.scene.canvas.; import javafx.scene.web.; import javafx.scene.layout.AnchorPane; import javafx.scene.shape.*;

public class AnchorPane_1 extends Application {

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

try {

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

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

// create a AnchorPane             AnchorPane anchor_pane = new AnchorPane(label);

// anchor to the label             AnchorPane.setTopAnchor(label, 10.0);             AnchorPane.setLeftAnchor(label, 10.0);             AnchorPane.setRightAnchor(label, 10.0);             AnchorPane.setBottomAnchor(label, 10.0);

// create a scene             Scene scene = new Scene(anchor_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 AnchorPane, adding label and button to it and also setting the min height and width of AnchorPane then add it to the stage: In this program we will create a AnchorPane named anchor_pane. Add a Label named label to the anchor_pane. Also add a Button named button and set the top, bottom, left, right anchor using the setTopAnchor(), setBottomAnchor(), setLeftAnchor(), setRightAnchor() functions respectively. Set the min height and width using the setMinHeight() and setMinWidth() function. Add the anchor_pane to the Scene. Finally, add the scene to the stage and call the show() function to display the results.

```java // Java Program to create a AnchorPane, adding // label and button to it and also setting the // min height and width of AnchorPane then 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.event.EventHandler; import javafx.scene.canvas.; import javafx.scene.web.; import javafx.scene.layout.AnchorPane; import javafx.scene.shape.*;

public class AnchorPane_2 extends Application {

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

try {

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

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

// create a AnchorPane             AnchorPane anchor_pane = new AnchorPane(label);

// anchor to the label             AnchorPane.setTopAnchor(label, 120.0);             AnchorPane.setLeftAnchor(label, 10.0);             AnchorPane.setRightAnchor(label, 230.0);             AnchorPane.setBottomAnchor(label, 120.0);

Button button = new Button("button ");

// anchor to the button             AnchorPane.setTopAnchor(button, 125.0);             AnchorPane.setLeftAnchor(button, 220.0);             AnchorPane.setRightAnchor(button, 110.0);             AnchorPane.setBottomAnchor(button, 125.0);

anchor_pane.getChildren().add(button);

anchor_pane.setMinHeight(400);             anchor_pane.setMinWidth(400);

// create a scene             Scene scene = new Scene(anchor_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: