how to bind a property to a JLabel? like, following, property, building

amy

Hi,

maybe someone can point me to some doc/ or example code...?

I want to do the following:
My databean has a property (which is not readonly, i.e. it has a
getter and a setter). Now, when building a form, I want to bind this
property to a JLabel fileld, so it is visible just as information, but can't
be edited and doesn't look like a disabled input field. Is there any
quot;standardquot; way of achieving this?

thanks,
Hermann Vosseler

Hi and welcome.

I don't think there's a binder in RCP that handles JLabels, but you could easily make one yourself.

I've made a binding that binds String properties to a label:Code:
public class StringLabelBinding extends CustomBinding
{
   private JTextField label;
   public StringLabelBinding(FormModel formModel, String formPropertyPath)   {       this(new JTextField(), formModel, formPropertyPath);   }
   public StringLabelBinding(JTextField label, FormModel formModel, String formPropertyPath)   {   super(formModel, formPropertyPath, String.class);       this.label = label;   }
   @Override   protected void valueModelChanged(Object newValue)   {       label.setText((String) newValue);
   }
   @Override   protected JComponent doBindControl()   {       return label;   }
   @Override   protected void enabledChanged()   {       label.setEnabled(isEnabled());
   }
   @Override   protected void readOnlyChanged()   {       label.setEditable(!isReadOnly());   }      @Override   protected boolean isReadOnly()   {       return true;   }

}
The binder is equally simple:Code:
public class StringLabelBinder implements Binder
{   @Override   public Binding bind(FormModel formModel, String formPropertyPath, Map context)   {       return new StringLabelBinding(formModel, formPropertyPath);   }
   @Override   public Binding bind(JComponent control, FormModel formModel, String formPropertyPath, Map context)   {       if (control instanceof JTextField)       {return new StringLabelBinding((JTextField) control, formModel, formPropertyPath);       }       else       {throw new IllegalArgumentException(quot;This binding's control must be a JTextFieldquot;);       }   }

}
Have fun!

You can use:

Code:
getBindingFactory().createBoundLabel(formProperty);
This is already available in SwingBindingFactory.

Regards,
Prashant

Ok, sorry, you're correct. However, this'll only work for String. If you want some more flexibility, you'll need to create a binder yourself. Say you want a label that shows the i18n value of an enum, you can easily adapt my binder to show enums.

With even more customisation, you could do something like:

A converter that you need to implement:Code:
public interface StringConverter
{   public String convertToString(Object toConvert);
}And hand it to the slightly altered binder and binding:Code:
public class StringLabelBinder implements Binder
{   private StringConverter converter;
   public void setConverter(StringConverter converter) { this.converter = converter; }
   public StringConverter getConverter()    {       if(converter == null)       {converter = new Converter() { public String convertToString(Object object) { return object.toString(); } }       }       return converter;   }    @Override   public Binding bind(FormModel formModel, String formPropertyPath, Map context)   {       return new StringLabelBinding(formModel, formPropertyPath, converter);   }
   @Override   public Binding bind(JComponent control, FormModel formModel, String formPropertyPath, Map context)   {       if (control instanceof JTextField)       {return new StringLabelBinding((JTextField) control, formModel, formPropertyPath, converter);       }       else       {throw new IllegalArgumentException(quot;This binding's control must be a JTextFieldquot;);       }   }
}

Code:
public class StringLabelBinding extends CustomBinding
{
   private JTextField label;   private StringConverter converter;
   public StringLabelBinding(FormModel formModel, String formPropertyPath, StringConverter converter)   {       this(new JTextField(), formModel, formPropertyPath, converter);   }
   public StringLabelBinding(JTextField label, FormModel formModel, String formPropertyPath, StringConverter converter)   {   super(formModel, formPropertyPath, String.class);       this.label = label;       this.converter = converter;   }
   @Override   protected void valueModelChanged(Object newValue)   {       label.setText(converter.convertToString(newValue));
   }
   @Override   protected JComponent doBindControl()   {       return label;   }
   @Override   protected void enabledChanged()   {       label.setEnabled(isEnabled());
   }
   @Override   protected void readOnlyChanged()   {       label.setEditable(!isReadOnly());   }      @Override   protected boolean isReadOnly()   {       return true;   }

}
So now you have a flexible solution to show any object type in a label. You only need to implement the String converter and use that in the Binder.

But again, for Strings it's overkill, prashantbhat answer will do nicely.

oh thanks... this did the trick

also thanks to LievenDoclo for posting the flexible sollution; it may come in handy for another problem I'll probably have to solve next...

and btw, Spring RichClient rocks!
Hermann

and btw, Spring RichClient rocks!
Hermann

Tell me something I don't already know

By the way, a small correction, the above binder will show a non-editable jtextfield, not a label. With a label, you're not able to select to content, with the above binder, it's possible to do so.