The Example Listings

OpenOffice.org Developer's Guide

Graphical User Interfaces

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• Exception Handling
• Dialogs and Controls
• Dialog Creation

• Instantiation of a Dialog
• Setting Dialog Properties
• Adding Controls to a Dialog
• Displaying Dialogs

• Dialog Handling

• Events
• Dialog Controls

• Common Properties
• Font-specific Properties
• Other Common Properties
• Property Propagation Between Model and Control
• Common Workflow to add Controls
• The Example Listings
• Label Field
• Command Button
• Image Control
• Check Box
• Radio Button
• Scroll Bar
• List Box
• Combo Box
• Progress Bar
• Horizontal/Vertical Line Control
• Group Box
• Text Field
• Text Field Extensions
• Formatted Field
• Numeric Field
• Currency Field
• Date Field
• Time Field
• Pattern Field
• Roadmap Control
• File Control
• File Picker
• Message Box

• The Toolkit Service
• Creating Menus

• Summarizing Example to Create a UNO Dialog

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As is generally known, an example is worth a thousand words. This is especially true for UNO. Sourcecode written in UNO is very often self-explanatory and for this reason the following sections provide a large set of example listings. Some of them are ready-to-use, whereas the focus of other examples is on demonstrating concepts.

All coding examples that demonstrate how to insert controls into a dialog make use of the following method:

  /** makes a String unique by appending a numerical suffix
   * @param _xElementContainer the com.sun.star.container.XNameAccess container
   * that the new Element is going to be inserted to
   * @param _sElementName the StemName of the Element
   */
  public static String createUniqueName(XNameAccess _xElementContainer, String _sElementName) {
      boolean bElementexists = true;
      int i = 1;
      String sIncSuffix = "";
      String BaseName = _sElementName;
      while (bElementexists) {
          bElementexists = _xElementContainer.hasByName(_sElementName);
          if (bElementexists) {
              i += 1;
              _sElementName = BaseName + Integer.toString(i);
          }
      }
      return _sElementName;
  }

As already explained, the dialog keeps the controls in a NamedContainer that implements com.sun.star.container.XNameAccess. It is absolutely necessary for the controls to have a unique name before they are added to the dialog to prevent a com.sun.star.container.ElementExistException . This method appends a suffix to the scheduled name of the control to make sure that the name is unique.

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