ListDataIntelliHints - Popup list shows only once

[lukasz.antoniak]

Hi,

I am trying to implement simple intelli-sense. In my case ListDataIntelliHints looks quite good - I do not need special cell renderer. I am trying to do some tests like:

Code: Select all

list.add("Paula");
list.add("Paulo");
list.add("Peru");
ListDataIntelliHints intelliHints = new ListDataIntelliHints(textPane, list);

where textPane is JTextPane.

This works but it shows intelli-hints only once at the beginning. How can I extend it on the whole document? Should I override some JTextPane action listeners?

[JIDE Support]

Since IntelliHint is open sourced, you can look at the code and find out why it is not working. I guess that's because by default ListDataIntelliHints is for JTextField. You would need to customize it to make it working for JTextPane. Refer to FileIntelliHints for an example. The important method is updateHints. The return of this method will determine if the hints will be displayed.

Thanks,

[lukasz.antoniak]

I have found your advice very helpful. I have changed updateHints method to:

Code: Select all

    public boolean updateHints(Object context) {
        if (context == null) {
            return false;
        }
       
        String s = context.toString();
        s = s.substring(0, getTextComponent().getCaretPosition());
        int indexSpace = s.lastIndexOf(" ");
        int indexNewLine = s.lastIndexOf("\n");
        int indexTab = s.lastIndexOf("\t");
        int index = java.lang.Math.max(indexSpace, indexNewLine);
        index = java.lang.Math.max(index, indexTab);
        if (index != -1)
        {
           s = s.substring(index + "\n".length());
        }
        int substringLen = s.length();
        if (substringLen == 0) {
            return false;
        }

        List<String> possibleStrings = new ArrayList<String>();
        for (Object o : getCompletionList()) {
            String listEntry = (String) o;
            if (substringLen > listEntry.length())
                continue;

            if (!isCaseSensitive()) {
                if (s.equalsIgnoreCase(listEntry.substring(0, substringLen)))
                    possibleStrings.add(listEntry);
            }
            else if (listEntry.startsWith(s))
                possibleStrings.add(listEntry);
        }

        Object[] objects = possibleStrings.toArray();
        setListData(objects);
        return objects.length > 0;
    }

It works fine when I input data to my JTextField from keyboard.
When I want to read a file from a hard drive, I create new JTextField, active intellihints (like in manual) and read it line by line (for some reason).

Code: Select all

    try {
       FileInputStream fstream = new FileInputStream(filePath);
       DataInputStream in = new DataInputStream(fstream);
       BufferedReader br = new BufferedReader(new InputStreamReader(in));
       String strLine;
       int offset = 0;
       while ((strLine = br.readLine()) != null)
       {
          tabEl.getTextPane().getDocument().insertString(offset, strLine + "\n", null);
          offset += strLine.length() + 1;
       }
       in.close();
    } catch (Exception e) {
       System.out.println("Error while reading file.");
       e.printStackTrace();
    }

When I want to add some text (anywhere in the document), the "s" variable does not contain the appropriate value. It seams to me that getCaretPosition does not work correct.

What do you think could go wrong?

If you would like any screen-shots or more details please reply.

[JIDE Support]

Can you include a complete test case so that it is easy for me to run and see it?

Thanks,

[cool_cool]

How can I show intellihints only when i pressed Ctrl+space in a JEditorPane?

[cool_cool]

Why the location of the popup menu is always in the beginning of each line. How can I set it to the cursor location?
Thank you very much.[/code]

[JIDE Support]

Override getShowHintsKeyStroke and only return KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, KeyEvent.CTRL_MASK).

setFollowCaret(true).

Thanks,

[cool_cool]

Please help me for the Intellihints popup menu. I have modify it, but it doesn't work. I would like to develop a code completion like eclipse IDE. I can develop special render for JList, but the popup menu doesn't work with normal JList.
Requirement:
1. popup menu will appear anywhere in the text editor as long as Ctrl+Space is pressed.
2. if it is a blank space before the cusor, popup menu will appear and show all its content.

The following is my code:

Code: Select all

package xmleditor;

import java.awt.Dimension;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.text.JTextComponent;

import com.jidesoft.hints.AbstractListIntelliHints;
import com.jidesoft.swing.SelectAllUtils;

public class Intellisense extends AbstractListIntelliHints {
  private List<String> cList;

  public Intellisense(JTextComponent comp) {
    super(comp);
  }

  public void setCompletionList(String[] array) {
    cList = new ArrayList<String>();
    for (String s : array) {
      cList.add(s);
    }
  }

  // *******************************************************************************//
  @Override
  protected JList createList() {
    String str[] = { "a", "ab", "abcd", "abcde", "abcedf", "Test str" };
    setCompletionList(str);
    JList listUI = new JList(str) {
      @Override
      public int getVisibleRowCount() {
        int size = getModel().getSize();
        return size < super.getVisibleRowCount() ? size : super.getVisibleRowCount();
      }

      @Override
      public Dimension getPreferredScrollableViewportSize() {
        if (getModel().getSize() == 0) {
          return new Dimension(0, 0);
        } else {
          return super.getPreferredScrollableViewportSize();
        }
      }
    };
    return listUI;
  }

  int lastEnterIndex = -1;

  public boolean updateHints(Object context) {
    if (context == null) {
      return false;
    }
    if (context.equals("")) {
      return updateHints1(context);
    }

    String contentText = context.toString();
    JTextComponent tc = getTextComponent();
    String editorText = tc.getText();

    int currentCaret = tc.getCaretPosition();
    lastEnterIndex = editorText.lastIndexOf('\n', currentCaret);
    int lineBeginCaret = 0;
    if (lastEnterIndex != -1) {
      int enterNum = getAppearNumber(editorText, '\n');
      lineBeginCaret = lastEnterIndex - (enterNum - 1);
    }

    int index = currentCaret - lineBeginCaret - 1;
    boolean found = false;

    while ((index > -1) && (!found)) {
      char current = contentText.charAt(index);
      if (current == ' ') {
        found = true;
        if (index == currentCaret - 1) {
          return false; // blank space - nothing happens
        }
      } else {
        index--;
      }
    }

    if (index == -1)
      index = 0;

    if (found) {
      String sub = contentText.substring(index + 1, contentText.length());
      return updateHints1(sub);
    } else {
      return updateHints1(context);
    }
  }

  public boolean updateHints1(Object context) {
    if (context == null) {
      return false;
    }
    String s = context.toString();
    int substringLen = s.length();
    List<String> possibleStrings = new ArrayList<String>();
    for (String listEntry : cList) {
      if (s.length() == 0) {
        // if "", add all
        possibleStrings.add(listEntry);
      } else {
        if (substringLen > listEntry.length())
          continue;
        String tmp = listEntry.substring(0, substringLen);
        if (s.equalsIgnoreCase(tmp)) {
          possibleStrings.add(listEntry);
        }
      }
    }

    setListData(possibleStrings.toArray());
    return possibleStrings.size() > 0;
  }

  public int getAppearNumber(String s, char c) {
    int i = 0;

    int index;
    while ((index = s.indexOf(c)) != -1) {
      i++;
      s = s.substring(index + 1, s.length());
    }
    return i;
  }

  protected KeyStroke getShowHintsKeyStroke() {
    return KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, KeyEvent.CTRL_MASK);
  }

  public static void main(String[] args) throws Exception {
    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    final JFrame frame = new JFrame("Test");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JEditorPane textArea = new JEditorPane();
    SelectAllUtils.install(textArea);

    @SuppressWarnings("unused")
    Intellisense intellihints = new Intellisense(textArea);
    frame.setContentPane(textArea);
    frame.setSize(500, 500);
    frame.setVisible(true);

  }
}

[cool_cool]

where to write function: setFollowCaret(true)?
Thank you very much

[JIDE Support]

Constructor should be a good place to put that.

[JIDE Support]

The reason not working is because you have StringIndexOutOfBoundsException in your code at updateHints. If you fix, it will work.

Code: Select all

Exception in thread "AWT-EventQueue-0" java.lang.StringIndexOutOfBoundsException: String index out of range: 6
   at java.lang.String.charAt(String.java:687)
   at Intellisense.updateHints(Intellisense.java:76)
   at com.jidesoft.hints.AbstractIntelliHints.showHints(AbstractIntelliHints.java:202)
   at com.jidesoft.hints.AbstractIntelliHints.showHintsPopup(AbstractIntelliHints.java:193)
   at com.jidesoft.hints.AbstractIntelliHints$6.delegateActionPerformed(AbstractIntelliHints.java:459)
   at com.jidesoft.swing.DelegateAction.actionPerformed(DelegateAction.java:53)
   at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
..


Thanks,

[cool_cool]

Sorry, I cannot fix it, because this exception comes from updateHints(), and this function doesn't for the popup menu in the whole document, it works only for JTextfield. I will appreciate it that you can help me to get it. Or I can pay for it.

[JIDE Support]

The exception is really in your code (updateHints is your code now as you wrote it) so you should be able to fix it yourself. If you really don't want to bother with it, you may buy some consulting hours from us so that we can troubleshooting it for you.

Thanks,

[cool_cool]

how to buy consulting hourse? how much is it?

[JIDE Support]

Please email sales at jidesoft.com and ask for consulting service pricing.

Thanks,

[JIDE Support]

I took a look at your code just now as I had a few spare minutes. As I anticipated, it is an obvious logic error in your own code. See my fix below. I hope you could spend more time debugging yourself instead of blaming IntelliHint not support JEditorPane.

Just replace

Code: Select all

    if (lastEnterIndex != -1) {
      int enterNum = getAppearNumber(editorText, '\n');
      lineBeginCaret = lastEnterIndex - (enterNum - 1);
    }

with

Code: Select all

     if (lastEnterIndex != -1) {
         lineBeginCaret = lastEnterIndex + 1;
    }

We do provide consulting services but our customers usually use it for component design idea or new feature etc. We don't really want to fix small bugs for you as you are supposed to do it yourself.

Thanks,