【笔记】javafx_Accordion和TitledPane可折叠组件

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.NodeOrientation;
import javafx.scene.Scene;
import javafx.scene.control.Accordion;
import javafx.scene.control.Button;
import javafx.scene.control.TitledPane;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

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

    @Override
    public void start(Stage primaryStage) throws Exception {
    
    

        AnchorPane an = new AnchorPane();

        //提示：根据文档的提示，不要给TitledPane设置宽高
        TitledPane tilePane1 = new TitledPane("tilePane1",new Button("button1"));
        TitledPane tilePane2 = new TitledPane("tilePane2",new Button("button2"));
        TitledPane tilePane3 = new TitledPane("tilePane3",new Button("button3"));

        Accordion accordion = new Accordion();//折叠面板

        accordion.getPanes().addAll(tilePane1,tilePane2,tilePane3);//每次只能展开一个TitledPane

        //设置默认展开的组件
        accordion.setExpandedPane(tilePane3);

//        an.getChildren().addAll(tilePane1,tilePane2,tilePane3);
        an.getChildren().addAll(accordion);

//        AnchorPane.setTopAnchor(tilePane2,100.0);
//        AnchorPane.setTopAnchor(tilePane3,200.0);

        //是否有动画效果
//        tilePane1.setAnimated(false);
        //是否允许折叠
//        tilePane2.setCollapsible(false);//不允许折叠,就只能一直处在展开状态
        //是否允许展开
//        tilePane2.setExpanded(false);//不允许展开,就只能一直处于折叠状态
        //内容设置
        HBox hbox = new HBox(new Button("button1"),new Button("button2"),new Button("button3"));
        tilePane3.setContent(hbox);
        //设置指定图片(Node类型)
        tilePane3.setGraphic(new ImageView("icon/icon.png"));//应该传一个图片
        //设置初始状态

        //箭头方向
        tilePane3.setNodeOrientation(NodeOrientation.RIGHT_TO_LEFT);

        //TitledPane监听自己的状态
        tilePane1.expandedProperty().addListener(new ChangeListener<Boolean>() {
    
    
            @Override
            public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
    
    
                System.out.println(newValue);//打印状态，展开为true，折叠为false
            }
        });

        //Accordion监听子组件
        accordion.expandedPaneProperty().addListener(new ChangeListener<TitledPane>() {
    
    
            @Override
            public void changed(ObservableValue<? extends TitledPane> observable, TitledPane oldValue, TitledPane newValue) {
    
    
                if(newValue == null){
    
    //折叠起来的时候新值为空
                    System.out.println(oldValue.getText() + " 折叠");
                    return;
                }
                System.out.println(newValue.getText() + " 展开");
            }
        });

        Scene scene = new Scene(an);
        primaryStage.setScene(scene);
        primaryStage.setHeight(800);
        primaryStage.setWidth(800);
        primaryStage.setTitle("JavaFX");
        primaryStage.show();
    }
}

效果：

参考：
https://www.bilibili.com/video/BV13t411Z7es