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/*
Wotonomy: OpenStep design patterns for pure Java applications.
Copyright (C) 2001 Intersect Software Corporation
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see http://www.gnu.org
*/
package net.wotonomy.ui;
import net.wotonomy.foundation.NSArray;
/**
* This master detail association synchronizes the contents
* and selection of the master group into the detail group.
*/
public class MirrorDetailAssociation extends MasterDetailAssociation{
/**
* Standard constructor specifying the detail display group.
* @param displayGroup the detail display group of this
* Master-Detail Association
*/
public MirrorDetailAssociation(EODisplayGroup displayGroup){
super(displayGroup);
}
/**
* Called by subjectChanged() to requalify the controlled
* display group with the indexed object and the bound key.
* This implementation ignores both and sets the object array
* of the detail group to the displayed objects of the master
* and sets the selection to match.
*/
protected void requalify()
{
EODisplayGroup detail = (EODisplayGroup) object();
EODisplayGroup master =
displayGroupForAspect( ParentAspect );
if ( master != null )
{
NSArray masterObjects = master.displayedObjects();
NSArray detailObjects = detail.displayedObjects();
int size = masterObjects.size();
boolean different = false;
// see if lists contain the same object instances
if ( size == detailObjects.size() )
{
for ( int i = 0; i < size; i++ )
{
if ( masterObjects.objectAtIndex(i)
!= detailObjects.objectAtIndex(i) )
{
different = true;
break;
}
}
}
else // different sizes
{
different = true;
}
// if different, sync contents and selection with master
if ( different )
{
detail.setObjectArray( masterObjects );
detail.setSelectionIndexes( master.selectionIndexes() );
}
else // if selection changed, sync selection with master
if ( master.selectionChanged() )
{
detail.setSelectionIndexes( master.selectionIndexes() );
}
}
else // no bound display group, clear
{
detail.setObjectArray( null );
}
}
}
/*
* $Log$
* Revision 1.1 2006/02/16 13:22:22 cgruber
* Check in all sources in eclipse-friendly maven-enabled packages.
*
* Revision 1.2 2001/07/05 22:13:28 mpowers
* Now only updating if master has actually changed.
*
* Revision 1.1 2001/05/29 19:57:47 mpowers
* Added some neglected files.
*
*
*/
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