/*
* Copyright 2011 cruxframework.org.
*
* 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.cruxframework.crux.core.rebind.screen.widget.creator;
import org.cruxframework.crux.core.rebind.AbstractProxyCreator.SourcePrinter;
import org.cruxframework.crux.core.rebind.screen.widget.AttributeProcessor;
import org.cruxframework.crux.core.rebind.screen.widget.WidgetCreator;
import org.cruxframework.crux.core.rebind.screen.widget.WidgetCreatorContext;
import org.cruxframework.crux.core.rebind.screen.widget.creator.event.SelectionChangeEvtBind;
import org.cruxframework.crux.core.rebind.screen.widget.declarative.TagAttribute;
import org.cruxframework.crux.core.rebind.screen.widget.declarative.TagAttributes;
import org.cruxframework.crux.core.rebind.screen.widget.declarative.TagEvent;
import org.cruxframework.crux.core.rebind.screen.widget.declarative.TagEvents;
import com.google.gwt.view.client.MultiSelectionModel;
import com.google.gwt.view.client.NoSelectionModel;
import com.google.gwt.view.client.SingleSelectionModel;
/**
* A helper class to help on HasData widgets creation, based on crux pages metadata.
* @author Thiago da Rosa de Bustamante
*
*/
@TagAttributes({
@TagAttribute(value="selectionModel", processor=HasDataFactory.SelectionModelProcessor.class, type=HasDataFactory.SelectionModel.class, required=true,
supportsDataBinding=false,
description="Set the SelectionModel used by this widget. Accepts one value between:"
+ "<ul>"
+ "<li>multiSelection - allows multiple items to be selected</li>"
+ "<li>noSelection - does not allow selection, but fires selection change events. Use this model if you want to know when a user selects an item, but do not want the view to update based on the selection</li>"
+ "<li>singleSelection - allows only one item to be selected a time</li>"
+ "</ul>")
})
@TagEvents({
@TagEvent(value=SelectionChangeEvtBind.class, description="Inform the handler for onSelectionChange event. This event is fired when the widget's selection is changed.")
})
public interface HasDataFactory<C extends WidgetCreatorContext> extends HasRowsFactory<C>, HasCellPreviewHandlersFactory<C>
{
enum SelectionModel{multiSelection, noSelection, singleSelection}
class SelectionModelProcessor extends AttributeProcessor<WidgetCreatorContext>
{
public SelectionModelProcessor(WidgetCreator<?> widgetCreator)
{
super(widgetCreator);
}
@Override
public void processAttribute(SourcePrinter out, WidgetCreatorContext context, String attributeValue)
{
SelectionModel selectionModel = SelectionModel.valueOf(attributeValue);
switch(selectionModel)
{
case multiSelection:
out.println(context.getWidget()+".setSelectionModel(new "+MultiSelectionModel.class.getCanonicalName()+"("+context.getWidget()+".getKeyProvider()));");
break;
case singleSelection:
out.println(context.getWidget()+".setSelectionModel(new "+SingleSelectionModel.class.getCanonicalName()+"("+context.getWidget()+".getKeyProvider()));");
break;
case noSelection:
out.println(context.getWidget()+".setSelectionModel(new "+NoSelectionModel.class.getCanonicalName()+"("+context.getWidget()+".getKeyProvider()));");
break;
}
}
}
}