/*
* Copyright 2009 JBoss, a divison Red Hat, Inc
*
* 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 org.jboss.errai.workspaces.client.layout;
import com.google.gwt.user.client.ui.Widget;
import org.jboss.errai.bus.client.ErraiBus;
import org.jboss.errai.bus.client.api.Message;
import org.jboss.errai.bus.client.api.base.MessageBuilder;
import org.jboss.errai.bus.client.api.MessageCallback;
import org.jboss.errai.workspaces.client.protocols.LayoutParts;
import java.util.LinkedHashMap;
public class LayoutHint {
private static LinkedHashMap<Widget, LayoutHintProvider> MANAGED_WIDGETS = new LinkedHashMap<Widget, LayoutHintProvider>();
private static LinkedHashMap<String, LayoutHintProvider> MANAGED_SUBJECTS = new LinkedHashMap<String, LayoutHintProvider>();
private static int counter = 0;
public static void attach(final Widget w, LayoutHintProvider p) {
String subject = "local:org.jboss.errai.sizeHints:" + counter++;
ErraiBus.get().subscribe(subject,
new MessageCallback() {
public void callback(Message message) {
w.setPixelSize(message.get(Double.class, LayoutParts.Width).intValue(),
message.get(Double.class, LayoutParts.Height).intValue());
}
});
MANAGED_WIDGETS.put(w, p);
MANAGED_SUBJECTS.put(subject, p);
}
public static LayoutHintProvider findProvider(Widget instance) {
return MANAGED_WIDGETS.get(instance);
}
public static LayoutHintProvider findProvider(String subject) {
return MANAGED_SUBJECTS.get(subject);
}
public static void hintAll() {
LayoutHintProvider p;
for (String s : MANAGED_SUBJECTS.keySet()) {
if ((p = findProvider(s)) != null && p.getWidthHint() > 0 && p.getHeightHint() > 0) {
MessageBuilder.createMessage()
.toSubject(s).signalling()
.with(LayoutParts.Width, p.getWidthHint())
.with(LayoutParts.Height, p.getHeightHint())
.noErrorHandling().sendNowWith(ErraiBus.get());
}
}
for (Widget w : MANAGED_WIDGETS.keySet()) {
p = findProvider(w);
if (p != null && w.isAttached() && p.getWidthHint() > 0 && p.getHeightHint() > 0) {
w.setPixelSize(p.getWidthHint(), p.getHeightHint());
}
}
}
}