com.pietschy.gwt.pectin.client.form.metadata.binding.AbstractEnabledBinding.java Source code

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Here is the source code for com.pietschy.gwt.pectin.client.form.metadata.binding.AbstractEnabledBinding.java

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/*
 * 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.pietschy.gwt.pectin.client.form.metadata.binding;

import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.pietschy.gwt.pectin.client.binding.AbstractBinding;
import com.pietschy.gwt.pectin.client.value.ValueModel;

/**
 * Created by IntelliJ IDEA.
* User: andrew
* Date: Jul 17, 2009
* Time: 1:00:14 PM
* To change this template use File | Settings | File Templates.
*/
public abstract class AbstractEnabledBinding<W> extends AbstractBinding implements ValueChangeHandler<Boolean> {
    private ValueModel<Boolean> model;
    private W widget;

    protected AbstractEnabledBinding(ValueModel<Boolean> model, W widget) {
        this.model = model;
        this.widget = widget;
        registerDisposable(model.addValueChangeHandler(this));
    }

    public void updateTarget() {
        updateWidget(model.getValue());
    }

    public W getTarget() {
        return widget;
    }

    protected abstract void updateWidget(boolean enabled);

    public void onValueChange(ValueChangeEvent<Boolean> event) {
        updateWidget(event.getValue());
    }
}