/*
* Copyright 2009 Andrew Pietsch
*
* 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.dragome.forms.bindings.client.binding;
import com.dragome.forms.bindings.client.value.MutableValueModel;
import com.dragome.model.interfaces.HasValue;
import com.dragome.model.interfaces.ValueChangeEvent;
import com.dragome.model.interfaces.ValueChangeHandler;
/**
* Created by IntelliJ IDEA.
* User: andrew
* Date: Jul 1, 2009
* Time: 4:35:13 PM
* To change this template use File | Settings | File Templates.
*/
public class ValueModelWithValueBinding<T> extends AbstractMutableValueBinding<T>
{
private HasValue<Boolean> widget;
private T value;
private ValueChangeHandler<Boolean> widgetChangeMonitor= new ValueChangeHandler<Boolean>()
{
public void onValueChange(ValueChangeEvent<Boolean> event)
{
onWidgetValueChange(event);
}
};
public ValueModelWithValueBinding(MutableValueModel<T> field, HasValue<Boolean> widget, T value)
{
super(field);
this.widget= widget;
this.value= value;
registerDisposable(widget.addValueChangeHandler(widgetChangeMonitor));
}
private void onWidgetValueChange(ValueChangeEvent<Boolean> event)
{
// we only write back to the model if we've been selected.
if (event.getValue())
{
updateModel(this.value);
}
}
protected void updateTarget(T value)
{
widget.setValue(areEqual(this.value, value), false);
}
public HasValue<Boolean> getTarget()
{
return widget;
}
}