JavaFX 8 Swing 兼容性

Question

我目前正在评估是否可以使用 SwingNode 将我当前的 Swing 应用程序转换为 JavaFX 8，然后慢慢将所有内容更改为 JavaFX 组件。我偶然发现了两个问题，它们可能是 JavaFX 8 中挥之不去的错误，但我不能确定。

1. 将内容添加到 SwingNode 后，未绘制 Javafx 菜单正确(大部分时间)，导致黑条

2. 使 JScrollBars 不透明似乎不起作用

   import java.awt.Color;
   import java.awt.GridLayout;
   
   import javafx.application.Application;
   import javafx.embed.swing.SwingNode;
   import javafx.scene.Scene;
   import javafx.scene.control.Menu;
   import javafx.scene.control.MenuBar;
   import javafx.scene.layout.StackPane;
   import javafx.scene.layout.VBox;
   import javafx.stage.Stage;
   
   import javax.swing.JPanel;
   import javax.swing.JScrollPane;
   
   
   public class Test extends Application {    
   
       @Override
       public void start(Stage stage) throws Exception {
           stage.setMaximized(true);
   
           VBox vbox = new VBox();
           MenuBar menuBar = new MenuBar();
           menuBar.getMenus().add(new Menu("bla"));
           vbox.getChildren().add(menuBar);
   
           StackPane mainPane = new StackPane();        
           mainPane.setPrefSize(9999, 9999); //Better way to ensure all space used?
           vbox.getChildren().add(mainPane);
           vbox.setVisible(true);
   
           Scene scene = new Scene(vbox, 9999, 9999); //Better way to ensure all space used?
           stage.setScene(scene);
   
           SwingNode swingNode = new SwingNode();
           mainPane.getChildren().add(swingNode);
   
           JPanel jPanel = new JPanel();
           swingNode.setContent(jPanel); //Seems to interfere with painting of menu
   
           jPanel.setBackground(Color.WHITE);
           jPanel.setLayout(new GridLayout(2, 1));
           jPanel.add(new JPanel());
   
           JPanel nonOpaquePanel = new JPanel();
           nonOpaquePanel.setOpaque(false);
           JScrollPane scrollPane = new JScrollPane(nonOpaquePanel);
           scrollPane.setOpaque(false);
           scrollPane.getViewport().setOpaque(false); //Black background -> Bug?
           jPanel.add(scrollPane);
   
           stage.show();
       }
   
       /**
        * Main method launching the application.
        */
       public static void main(String[] args) {
           launch(args);
       }
   }
   

   Executable jar

编辑:我编辑了示例以使用 EDT 创建 Swing 组件。那并没有改变任何事情。还是我做错了什么？

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;


public class Test extends Application {
    private JPanel jPanel = null;

    @Override
    public void start(Stage stage) throws Exception {
        if (Platform.isFxApplicationThread()) { // all of this happens on the fx application thread
            stage.setMaximized(true);

            VBox vbox = new VBox();
            MenuBar menuBar = new MenuBar();
            menuBar.getMenus().add(new Menu("bla"));
            vbox.getChildren().add(menuBar);

            StackPane mainPane = new StackPane();        
            mainPane.setPrefSize(9999, 9999); //Better way to ensure all space used?
            vbox.getChildren().add(mainPane);
            vbox.setVisible(true);

            Scene scene = new Scene(vbox, 9999, 9999); //Better way to ensure all space used?
            stage.setScene(scene);

            SwingNode swingNode = new SwingNode();
            mainPane.getChildren().add(swingNode);                    

            SwingUtilities.invokeLater(new Runnable() { //Use EDT to build swing components              
                @Override
                public void run() {
                    jPanel = new JPanel();

                    jPanel.setBackground(Color.WHITE);
                    jPanel.setLayout(new GridLayout(2, 1));
                    jPanel.add(new JPanel());

                    JLabel nonOpaquePanel = new JLabel("Bla");
                    nonOpaquePanel.setPreferredSize(new Dimension(5000, 5000));
                    nonOpaquePanel.setOpaque(false);
                    JScrollPane scrollPane = new JScrollPane(nonOpaquePanel);
                    scrollPane.setOpaque(false);
                    scrollPane.getViewport().setOpaque(false); //Black background -> Bug?
                    jPanel.add(scrollPane);
                }
            });

            Thread.sleep(1000); //terrible way to wait for the EDT, I know
            swingNode.setContent(jPanel); //Seems to interfere with painting of menu            
            stage.show();

            SwingUtilities.invokeLater(new Runnable() { //I am pretty sure this isn't necessary, but whatever                       
                @Override
                public void run() {
                    jPanel.repaint();    
                }
            });
        }
    }

    /**
     * Main method launching the application.
     */
    public static void main(String[] args) {
        launch(args);
    }
}

Answer 1

尝试在进行更新调用时将更新代码包装在其中。此代码之前在其他项目中对我有所帮助。

Platform.runLater(new Runnable() {
            @Override
            public void run() {
                // Update the text node with calculated results
            }
       });

Source