com.google.gwt.editor.client.impl.Refresher Maven / Gradle / Ivy
/*
* Copyright 2011 Google 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 com.google.gwt.editor.client.impl;
import com.google.gwt.editor.client.EditorContext;
import com.google.gwt.editor.client.EditorVisitor;
import com.google.gwt.editor.client.LeafValueEditor;
import com.google.gwt.editor.client.ValueAwareEditor;
/**
* A lightweight peer to {@link Initializer} which simply resets the values in
* the editor and delegate hiererchy.
*/
public class Refresher extends EditorVisitor {
@Override
public boolean visit(EditorContext ctx) {
Q toSet = ctx.getFromModel();
@SuppressWarnings("unchecked")
AbstractEditorDelegate delegate = (AbstractEditorDelegate) ctx.getEditorDelegate();
if (delegate != null) {
delegate.setObject(delegate.ensureMutable(toSet));
delegate.setDirty(false);
}
ValueAwareEditor asValue = ctx.asValueAwareEditor();
if (asValue != null) {
// Call setValue for ValueAware, non-leaf editors
asValue.setValue(toSet);
} else {
LeafValueEditor asLeaf = ctx.asLeafValueEditor();
if (asLeaf != null) {
// Call setvalue for LeafValueEditors.
asLeaf.setValue(toSet);
}
}
// CompositeEditor's setValue should create sub-editors and attach them to
// the EditorChain, which will traverse them. Returning true here for a
// CompositeEditor would then traverse it twice. See issue 7038.
return ctx.asCompositeEditor() == null;
}
}