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- /*
- * Copyright 2011 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.vaadin.terminal.gwt.client.ui;
-
- import java.util.Collections;
- 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> childComponents;
-
- private final boolean debugLogging = false;
-
- /**
- * Default constructor
- */
- public AbstractComponentContainerConnector() {
- addConnectorHierarchyChangeHandler(this);
- }
-
- /*
- * (non-Javadoc)
- *
- * @see
- * com.vaadin.terminal.gwt.client.ComponentContainerConnector#getChildren()
- */
- @Override
- public List<ComponentConnector> getChildComponents() {
- if (childComponents == null) {
- return Collections.emptyList();
- }
-
- return childComponents;
- }
-
- /*
- * (non-Javadoc)
- *
- * @see
- * com.vaadin.terminal.gwt.client.ComponentContainerConnector#setChildren
- * (java.util.Collection)
- */
- @Override
- public void setChildComponents(List<ComponentConnector> childComponents) {
- this.childComponents = childComponents;
- }
-
- /*
- * (non-Javadoc)
- *
- * @see com.vaadin.terminal.gwt.client.ComponentContainerConnector#
- * connectorHierarchyChanged
- * (com.vaadin.terminal.gwt.client.ConnectorHierarchyChangedEvent)
- */
- @Override
- 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 : getChildComponents()) {
- newChildren += Util.getConnectorString(child) + " ";
- }
- VConsole.log(newChildren);
- }
- }
-
- @Override
- public HandlerRegistration addConnectorHierarchyChangeHandler(
- ConnectorHierarchyChangeHandler handler) {
- return ensureHandlerManager().addHandler(
- ConnectorHierarchyChangeEvent.TYPE, handler);
- }
- }
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