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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.client.ui;
import java.util.LinkedList;
import java.util.List;
import com.google.gwt.event.shared.HandlerRegistration;
import com.vaadin.terminal.gwt.client.ComponentConnector;
import com.vaadin.terminal.gwt.client.ComponentContainerConnector;
import com.vaadin.terminal.gwt.client.ConnectorHierarchyChangeEvent;
import com.vaadin.terminal.gwt.client.ConnectorHierarchyChangeEvent.ConnectorHierarchyChangeHandler;
import com.vaadin.terminal.gwt.client.Util;
import com.vaadin.terminal.gwt.client.VConsole;
public abstract class AbstractComponentContainerConnector extends
AbstractComponentConnector implements ComponentContainerConnector,
ConnectorHierarchyChangeHandler {
List<ComponentConnector> children;
private final boolean debugLogging = false;
/**
* Temporary storage for last enabled state to be able to see if it has
* changed. Can be removed once we are able to listen specifically for
* enabled changes in the state. Widget.isEnabled() cannot be used as all
* Widgets do not implement HasEnabled
*/
private boolean lastWidgetEnabledState = true;
/**
* Default constructor
*/
public AbstractComponentContainerConnector() {
addConnectorHierarchyChangeHandler(this);
}
/*
* (non-Javadoc)
*
* @see
* com.vaadin.terminal.gwt.client.ComponentContainerConnector#getChildren()
*/
public List<ComponentConnector> getChildren() {
if (children == null) {
return new LinkedList<ComponentConnector>();
}
return children;
}
/*
* (non-Javadoc)
*
* @see
* com.vaadin.terminal.gwt.client.ComponentContainerConnector#setChildren
* (java.util.Collection)
*/
public void setChildren(List<ComponentConnector> children) {
this.children = children;
}
/*
* (non-Javadoc)
*
* @see com.vaadin.terminal.gwt.client.ComponentContainerConnector#
* connectorHierarchyChanged
* (com.vaadin.terminal.gwt.client.ConnectorHierarchyChangedEvent)
*/
public void onConnectorHierarchyChange(ConnectorHierarchyChangeEvent event) {
if (debugLogging) {
VConsole.log("Hierarchy changed for "
+ Util.getConnectorString(this));
String oldChildren = "* Old children: ";
for (ComponentConnector child : event.getOldChildren()) {
oldChildren += Util.getConnectorString(child) + " ";
}
VConsole.log(oldChildren);
String newChildren = "* New children: ";
for (ComponentConnector child : getChildren()) {
newChildren += Util.getConnectorString(child) + " ";
}
VConsole.log(newChildren);
}
}
public HandlerRegistration addConnectorHierarchyChangeHandler(
ConnectorHierarchyChangeHandler handler) {
return ensureHandlerManager().addHandler(
ConnectorHierarchyChangeEvent.TYPE, handler);
}
@Override
public void setWidgetEnabled(boolean widgetEnabled) {
if (lastWidgetEnabledState == widgetEnabled) {
return;
}
lastWidgetEnabledState = widgetEnabled;
super.setWidgetEnabled(widgetEnabled);
for (ComponentConnector c : getChildren()) {
// Update children as they might be affected by the enabled state of
// their parent
c.setWidgetEnabled(c.isEnabled());
}
}
}
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