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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.client;
import java.util.Set;
import com.google.gwt.user.client.ui.Widget;
public interface Container extends Paintable {
/**
* Replace child of this layout with another component.
*
* Each layout must be able to switch children. To to this, one must just
* give references to a current and new child.
*
* @param oldComponent
* Child to be replaced
* @param newComponent
* Child that replaces the oldComponent
*/
void replaceChildComponent(Widget oldComponent, Widget newComponent);
/**
* Is a given component child of this layout.
*
* @param component
* Component to test.
* @return true iff component is a child of this layout.
*/
boolean hasChildComponent(Widget component);
/**
* Update child components caption, description and error message.
*
* <p>
* Each component is responsible for maintaining its caption, description
* and error message. In most cases components doesn't want to do that and
* those elements reside outside of the component. Because of this layouts
* must provide service for it's childen to show those elements for them.
* </p>
*
* @param component
* Child component for which service is requested.
* @param uidl
* UIDL of the child component.
*/
void updateCaption(Paintable component, UIDL uidl);
/**
* Called when a child components size has been updated in the rendering
* phase.
*
* @param children
* Set of child widgets whose size have changed
* @return true if the size of the Container remains the same, false if the
* event need to be propagated to the Containers parent
*/
boolean requestLayout(Set<Paintable> children);
/**
* Returns the size currently allocated for the child component.
*
* @param child
* @return
*/
RenderSpace getAllocatedSpace(Widget child);
}
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