org.eclipse.jface.viewers.ILazyContentProvider Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2005, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.viewers;
/**
* The ILazyContentProvider is the content provider
* for table viewers created using the SWT.VIRTUAL flag that
* only wish to return their contents as they are queried.
*
* NOTE: As the ILazyContentProvider does
* not have API for determining the total item count any
* changes to the number of items for this object while
* require a call to #setItemCount on the
* viewer that uses it.
*/
public interface ILazyContentProvider extends IContentProvider {
/**
* Called when a previously-blank item becomes visible in the
* TableViewer. If the content provider knows the element
* at this row, it should respond by calling
* TableViewer#replace(Object, int).
*
* NOTE #updateElement(int index) can be used to determine selection
* values. TableViewer#replace(Object, int) is not called before
* returning from this method selections may have missing or stale elements.
* In this situation it is suggested that the selection is asked
* for again after he update.
*
* @param index The index that is being updated in the
* table.
*/
public void updateElement(int index);
}