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package org.openoffice.accessibility.awb.view;
import javax.swing.JPanel;
import com.sun.star.accessibility.AccessibleEventObject;
import com.sun.star.accessibility.XAccessibleContext;
/** This is the base class for all object views that can be placed inside an
object view container.
<p>When provided with a new accessible object the container will call
the Create method to create a new instance when certain conditions are
met. It then calls SetObject to pass the object to the instance.
Finally it calls Update.</p>
<p>The SetObject and Update methods may be called for a new object
without calling Create first. In this way an existing instance is
recycled.</p>
*/
abstract public class ObjectView
extends JPanel
{
/** This factory method creates a new instance of the (derived) class
when the given accessible object supports all necessary features.
In the ususal case this will be the support of a specific
accessibility interface.
*/
static public ObjectView Create (
ObjectViewContainer aContainer,
XAccessibleContext xContext)
{
return null;
}
public ObjectView (ObjectViewContainer aContainer)
{
maContainer = aContainer;
mxContext = null;
}
/** Call this when you want the object to be destroyed. Release all
resources when called.
*/
public void Destroy ()
{
}
/** Tell the view to display information for a new accessible object.
@param xObject
The given object may be null. A typical behaviour in this case
would be to display a blank area. But is also possible to show
information about the last object.
*/
public void SetObject (XAccessibleContext xContext)
{
mxContext = xContext;
Update ();
}
/** This is a request of a repaint with the current state of the current
object. The current object may or may not be the same as the one
when Update() was called the last time.
*/
public void Update ()
{
}
/** Return a string that is used as a title of an enclosing frame.
*/
abstract public String GetTitle ();
public ObjectViewContainer GetContainer ()
{
return maContainer;
}
/** Implement this method if you are interested in accessible events.
*/
public void notifyEvent (AccessibleEventObject aEvent)
{}
/// Reference to the current object to display information about.
protected XAccessibleContext mxContext;
protected ObjectViewContainer maContainer;
}
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