/*******************************************************************************
* Copyright (C) 2011 Lars Grammel
*
* 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.thechiselgroup.choosel.core.client.visualization.ui;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.thechiselgroup.choosel.core.client.ui.widget.listbox.ExtendedListBox;
import org.thechiselgroup.choosel.core.client.ui.widget.listbox.ListBoxControl;
import org.thechiselgroup.choosel.core.client.util.collections.LightweightCollection;
import org.thechiselgroup.choosel.core.client.util.transform.Transformer;
import org.thechiselgroup.choosel.core.client.visualization.model.Slot;
import org.thechiselgroup.choosel.core.client.visualization.model.VisualItem;
import org.thechiselgroup.choosel.core.client.visualization.model.managed.DefaultManagedSlotMappingConfiguration;
import org.thechiselgroup.choosel.core.client.visualization.model.managed.VisualItemValueResolverFactory;
import org.thechiselgroup.choosel.core.client.visualization.resolvers.ui.VisualItemValueResolverUIController;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
//Slot name is [________] + [uiControllerWidget]
public class DefaultSlotControl extends SlotControl {
private VisualItemValueResolverUIController uiController;
private ListBoxControl<VisualItemValueResolverFactory> resolverFactorySelector;
private ChangeHandler factorySelectedChangeHandler;
private VerticalPanel panel;
private Widget currentUIControllerWidget;
// TODO I don't like how I need this here just to get the visualItems. I feel
// like this class should not know about view items. It could always keep
// track of updates, but then it is possible to introduce inconsistencies
private DefaultManagedSlotMappingConfiguration configuration;
public DefaultSlotControl(Slot slot,
DefaultManagedSlotMappingConfiguration configurationUIModel,
VisualItemValueResolverUIController uiController) {
super(slot);
this.uiController = uiController;
this.configuration = configurationUIModel;
panel = new VerticalPanel();
/**
* Only responsible for changing the selected resolver, the change in UI
* will handled elsewhere
*/
factorySelectedChangeHandler = new ChangeHandler() {
@Override
public void onChange(ChangeEvent event) {
VisualItemValueResolverFactory resolverFactory = resolverFactorySelector
.getSelectedValue();
LightweightCollection<VisualItem> visualItems = configuration
.getVisualItems();
configuration.getManagedSlotMapping(getSlot()).setResolver(
resolverFactory.create(visualItems));
updateOptions(visualItems);
}
};
resolverFactorySelector = new ListBoxControl<VisualItemValueResolverFactory>(
new ExtendedListBox(false),
new Transformer<VisualItemValueResolverFactory, String>() {
@Override
public String transform(
VisualItemValueResolverFactory factory) {
return factory.getLabel();
}
});
}
// TODO add special UI stuff for resolvers that are in error
@Override
public Widget asWidget() {
// updateFactorySelector();
Label slotNameLabel = new Label(getSlot().getName() + " is ");
Widget factorySelectorWidget = resolverFactorySelector.asWidget();
currentUIControllerWidget = uiController.asWidget();
assert factorySelectorWidget != null;
assert currentUIControllerWidget != null;
panel.add(slotNameLabel);
panel.add(factorySelectorWidget);
panel.add(currentUIControllerWidget);
return panel;
}
@Override
public String getCurrentResolverUIId() {
return uiController.getId();
}
private List<VisualItemValueResolverFactory> getFactoryList() {
List<VisualItemValueResolverFactory> result = new ArrayList<VisualItemValueResolverFactory>();
Collection<VisualItemValueResolverFactory> allowableResolverFactories = configuration
.getManagedSlotMapping(getSlot())
.getAllowableResolverFactories();
for (VisualItemValueResolverFactory factrory : allowableResolverFactories) {
result.add(factrory);
}
return result;
}
@Override
public void setNewUIModel(VisualItemValueResolverUIController resolverUI) {
this.uiController = resolverUI;
panel.remove(currentUIControllerWidget);
currentUIControllerWidget = uiController.asWidget();
panel.add(currentUIControllerWidget);
}
private void updateFactorySelector(
LightweightCollection<VisualItem> visualItems) {
// TODO there is a mem bug here because we do not remove the old handler
resolverFactorySelector.setChangeHandler(factorySelectedChangeHandler);
resolverFactorySelector.setValues(getFactoryList());
// XXX what if the current factory becomes unavailable?
VisualItemValueResolverFactory currentFactory = configuration
.getManagedSlotMapping(getSlot()).getCurrentFactory();
assert currentFactory.canCreateApplicableResolver(getSlot(),
visualItems);
resolverFactorySelector.setSelectedValue(currentFactory);
}
@Override
public void updateOptions(LightweightCollection<VisualItem> visualItems) {
updateFactorySelector(visualItems);
uiController.update(visualItems);
}
}