/*
* Copyright 2000-2014 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.client.ui.customlayout;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.ApplicationConnection;
import com.vaadin.client.ComponentConnector;
import com.vaadin.client.ConnectorHierarchyChangeEvent;
import com.vaadin.client.Paintable;
import com.vaadin.client.UIDL;
import com.vaadin.client.communication.StateChangeEvent;
import com.vaadin.client.ui.AbstractLayoutConnector;
import com.vaadin.client.ui.SimpleManagedLayout;
import com.vaadin.client.ui.VCustomLayout;
import com.vaadin.shared.ui.Connect;
import com.vaadin.shared.ui.customlayout.CustomLayoutState;
import com.vaadin.ui.CustomLayout;
@Connect(CustomLayout.class)
public class CustomLayoutConnector extends AbstractLayoutConnector implements
SimpleManagedLayout, Paintable {
@Override
public CustomLayoutState getState() {
return (CustomLayoutState) super.getState();
}
@Override
protected void init() {
super.init();
getWidget().client = getConnection();
getWidget().pid = getConnectorId();
}
@Override
public void onStateChanged(StateChangeEvent stateChangeEvent) {
super.onStateChanged(stateChangeEvent);
// Ensure the template is initialized even if there are no children
// (#9725)
updateHtmlTemplate();
// Evaluate scripts
VCustomLayout.eval(getWidget().scripts);
getWidget().scripts = null;
}
private void updateHtmlTemplate() {
if (getWidget().hasTemplate()) {
// We (currently) only do this once. You can't change the template
// later on.
return;
}
String templateName = getState().templateName;
String templateContents = getState().templateContents;
if (templateName != null) {
// Get the HTML-template from client. Overrides templateContents
// (even though both can never be given at the same time)
templateContents = getConnection().getResource(
"layouts/" + templateName + ".html");
if (templateContents == null) {
templateContents = "<em>Layout file layouts/"
+ templateName
+ ".html is missing. Components will be drawn for debug purposes.</em>";
}
}
getWidget().initializeHTML(templateContents,
getConnection().getThemeUri());
}
@Override
public void onConnectorHierarchyChange(ConnectorHierarchyChangeEvent event) {
// Must call here in addition to onStateChanged because
// onConnectorHierarchyChange is invoked before onStateChanged
updateHtmlTemplate();
// For all contained widgets
for (ComponentConnector child : getChildComponents()) {
String location = getState().childLocations.get(child);
try {
getWidget().setWidget(child.getWidget(), location);
} catch (final IllegalArgumentException e) {
// If no location is found, this component is not visible
}
}
for (ComponentConnector oldChild : event.getOldChildren()) {
if (oldChild.getParent() == this) {
// Connector still a child of this
continue;
}
Widget oldChildWidget = oldChild.getWidget();
if (oldChildWidget.isAttached()) {
// slot of this widget is emptied, remove it
getWidget().remove(oldChildWidget);
}
}
}
@Override
public VCustomLayout getWidget() {
return (VCustomLayout) super.getWidget();
}
@Override
public void updateCaption(ComponentConnector paintable) {
getWidget().updateCaption(paintable);
}
@Override
public void layout() {
getWidget().iLayoutJS(DOM.getFirstChild(getWidget().getElement()));
}
@Override
public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
// Not interested in anything from the UIDL - just implementing the
// interface to avoid some warning (#8688)
}
}