JEditorPane and JScrollPane

[friso dejonge]

Hi all,
when i add an html file to a editorpane and then add that to a jscrollpane, the scrollbar is completely at the bottom, while i want to have it at the top.
I looked at scrollbar methods, but can find the right method to do it.
Anyone have ideas ?
thanks

[Rene Liebmann]

Hi,
have you tried the scrollRectToVisible method?
This method takes a Rectangle as Argument. There you could create simply a new Rectangle(0,0,0,0).
I have never tried this, but it should work.
Good Luck

Rene

[friso dejonge]

thanks rene,

JEditorPane editorPane = new JEditorPane("text/html", testbuffer.toString());
        editorPane.setEditable(false);
        JScrollPane jscrollpane = new JScrollPane(editorPane);
        jscrollpane.scrollRectToVisible(new Rectangle(0,0,0,0));
        jpanel.add(jscrollpane, BorderLayout.CENTER);
        jscrollpane.validate();
        jdialog.setVisible(true);  

but this does not seem to work either. maybe i am doing something wrong.

[Rene Liebmann]

Can you try to call scrollRectToVisible after your dialog is visible. If this doesn't work, then maybe you should add an empty JEditorPane, then you show your dialog and then you add the content. The last two steps you can change if you don't like it that way. In a normal case scrollRectToVisible is not needed.
Hope that helps

Rene

[friso dejonge]

no does not work either.
anything i am doing wrong ?

[Rene Liebmann]

Hi
I wrote a little sample. At least for me it works fine. Can you test it please. It is very simple. If you press the button, then you can choose an HTML file, which will be displayed.
If this doesn't work for you at all, then maybe your JDK has a bug???

  
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class TestHtmlViewer extends JFrame {
  JToolBar jToolBar1 = new JToolBar();
  JScrollPane jScrollPane1 = new JScrollPane();
  JButton btnLoad = new JButton();
  JEditorPane jEditorPane1 = new JEditorPane();
  public TestHtmlViewer() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    TestHtmlViewer testHtmlViewer1 = new TestHtmlViewer();
    testHtmlViewer1.setSize(400,500);
    testHtmlViewer1.show();
  }
  private void jbInit() throws Exception {
    btnLoad.setMnemonic('0');
    btnLoad.setText("Load HTML-File");
    btnLoad.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        btnLoad_actionPerformed(e);
      }
    });
    jEditorPane1.setContentType("text/html");
    this.getContentPane().add(jToolBar1, BorderLayout.NORTH);
    jToolBar1.add(btnLoad, null);
    this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jEditorPane1, null);
  }
  void btnLoad_actionPerformed(ActionEvent e) {
    JFileChooser chooser = new JFileChooser(".");
    int option = chooser.showOpenDialog(this);
    if (option!= chooser.APPROVE_OPTION) return;
    File file = chooser.getSelectedFile();
    try {
       if (file!= null && file.isFile())
          jEditorPane1.setPage(file.toURL());
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}

[John Smith]

You may also want to try adding the line:

  
editorPane.setCaretPosition(0);

This should cause the scroll pane to be moved all the way up to the top.

[friso dejonge]

both ways work,
thanks very much
friso