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  1. JDK
  2. JDK-8096786

[JFXPanel, Mac] WebView draws duplicate image on Retina display

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 8u20, 8u40
    • Fix Version/s: 8u40
    • Component/s: javafx
    • Labels:
      None
    • Environment:

      MacOS X 10.8x or 10.9x, Java8 update 20 or update 40

      Description

      Dear JavaFX team,

      As discussed with Stephen Northover, the WebView has an bug with Retina display.
      The following code to reproduce it:
      *************
      import java.awt.BorderLayout;
      import java.awt.Dimension;
      import java.awt.event.ActionEvent;
      import java.awt.event.ActionListener;

      import javafx.application.Platform;
      import javafx.embed.swing.JFXPanel;
      import javafx.scene.Scene;
      import javafx.scene.web.WebEngine;
      import javafx.scene.web.WebView;

      import javax.swing.BorderFactory;
      import javax.swing.JButton;
      import javax.swing.JFrame;
      import javax.swing.JPanel;
      import javax.swing.JTextField;
      import javax.swing.SwingUtilities;
        
      public class RetinaBug extends JFrame {
       
          private JFXPanel[] jfxPanels = { new JFXPanel(), new JFXPanel()};
          private WebEngine[] engines = { null, null};
       
          private final JPanel panel = new JPanel(new BorderLayout());
          private final JButton step1 = new JButton("Step 1");
          private final JButton step2 = new JButton("Step 2");
          private final JTextField txt = new JTextField();
       
          public RetinaBug() {
              super();
              initComponents();
          }

          
          private void initComponents() {
              createScene(0);
              
              JPanel topBar = new JPanel(new BorderLayout(5, 0));
              topBar.setBorder(BorderFactory.createEmptyBorder(3, 5, 3, 5));
              topBar.add(step1, BorderLayout.WEST);
              topBar.add(txt, BorderLayout.CENTER);
              topBar.add(step2, BorderLayout.EAST);
        
              panel.add(topBar, BorderLayout.NORTH);
              panel.add(jfxPanels[0], BorderLayout.CENTER);
              
              getContentPane().add(panel);
              
              setPreferredSize(new Dimension(1024, 600));
              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              pack();

              step1.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
      step1.setEnabled(false);
      step2.setEnabled(true);
      panel.remove(jfxPanels[0]);
      if (engines[1]==null) createScene(1);
      panel.add(jfxPanels[1], BorderLayout.CENTER);
      }
      });
              
              step2.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
      step1.setEnabled(true);
      step2.setEnabled(false);
      panel.remove(jfxPanels[1]);
      panel.add(jfxPanels[0], BorderLayout.CENTER);
      }
      });
              step2.setEnabled(false);
          }
       
          private void createScene(final int sceneId) {
       
              Platform.runLater(new Runnable() {
                  @Override
                  public void run() {
                      WebView view = new WebView();
                      engines[sceneId] = view.getEngine();
                      jfxPanels[sceneId].setScene(new Scene(view));
                      engines[sceneId].load( (sceneId==0)?"http://www.sap.com":"http://www.google.com");
                  }
              });
          }
          public static void main(String[] args) {
           Platform.setImplicitExit(false);
              SwingUtilities.invokeLater(new Runnable() {

                  public void run() {
                   RetinaBug browser = new RetinaBug();
                      browser.setVisible(true);
                 }
             });
          }
      }


      ****
      Steps to reproduce (on MacOS X with RETINA):
      1. Compile and run the provided sample
      2. Click on Step 1, when the web site is loaded (sap.com)
      3. Click on Step 2, then a new webview will be used with content of "google.com"
      4. Click on Step 1 button -> now the original site will be rendered twice

      With Best Regards,
      Mykola Gorbarov (Nick)

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              Assignee:
              ant Anton Tarasov
              Reporter:
              mykolagorjfx MykolaGorbarov_SAP (Inactive)
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                Created:
                Updated:
                Resolved:
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