bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/ContainerPlaceholder.java

package org.eclipse.ui.internal;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */

public class ContainerPlaceholder extends PartPlaceholder
	implements ILayoutContainer
{
	private static int nextId = 0;
	private ILayoutContainer realContainer;
/**
 * ContainerPlaceholder constructor comment.
 * @param id java.lang.String
 * @param label java.lang.String
 */
public ContainerPlaceholder(String id) {
	super(((id == null)?"Container Placeholder "+nextId++:id));//$NON-NLS-1$
}
/**
 * add method comment.
 */
public void add(LayoutPart child) {
	if (!(child instanceof PartPlaceholder)) return;
	realContainer.add(child);
}
/**
 * See ILayoutContainer::allowBorder
 */
public boolean allowsBorder() {
	return true;
}
/**
 * getChildren method comment.
 */
public LayoutPart[] getChildren() {
	return realContainer.getChildren();
}
/**
 * getFocus method comment.
 */
public LayoutPart getFocus() {
	return null;
}
/**
 * getFocus method comment.
 */
public LayoutPart getRealContainer() {
	return (LayoutPart)realContainer;
}
/**
 * isChildVisible method comment.
 */
public boolean isChildVisible(LayoutPart child) {
	return false;
}
/**
 * remove method comment.
 */
public void remove(LayoutPart child) {
	if (!(child instanceof PartPlaceholder)) return;
	realContainer.remove(child);
}
/**
 * replace method comment.
 */
public void replace(LayoutPart oldChild, LayoutPart newChild) {
	if (!(oldChild instanceof PartPlaceholder) && !(newChild instanceof PartPlaceholder)) return;
	realContainer.replace(oldChild, newChild);
}
/**
 * setChildVisible method comment.
 */
public void setChildVisible(LayoutPart child, boolean visible) {}
/**
 * setFocus method comment.
 */
public void setFocus(LayoutPart child) {}
public void setRealContainer(ILayoutContainer container) {

	if (container == null) {
		// set the parent container of the children back to the real container
		if (realContainer != null) {
			LayoutPart[] children = realContainer.getChildren();
			if (children != null) {
				for (int i = 0, length = children.length; i < length; i++){
					children[i].setContainer(realContainer);
				}
			}
		}
	} else {
		// replace the real container with this place holder
		LayoutPart[] children = container.getChildren();
		if (children != null) {
			for (int i = 0, length = children.length; i < length; i++){
				children[i].setContainer(this);
			}
		}
	}

	this.realContainer = container;
}
}