/*******************************************************************************
 * Copyright (c) 2007, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

module org.eclipse.jface.internal.databinding.swt.TextEditableObservableValue;

import java.lang.all;

import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.jface.internal.databinding.provisional.swt.AbstractSWTObservableValue;
import org.eclipse.swt.widgets.Text;

/**
 * Observable value for the editable property of a Text.
 * 
 * @since 1.1
 */
public class TextEditableObservableValue : AbstractSWTObservableValue {
    private Text text;
    
    /**
     * @param text
     */
    public this(Text text) {
        super(text);    
        this.text = text;
    }
    
    /**
     * @param realm
     * @param text
     */
    public this(Realm realm, Text text) {
        super(realm, text);
        this.text = text;
    }

    /* (non-Javadoc)
     * @see org.eclipse.core.databinding.observable.value.AbstractObservableValue#doGetValue()
     */
    protected Object doGetValue() {
        return (text.getEditable()) ? Boolean.TRUE : Boolean.FALSE;
    }
    
    /* (non-Javadoc)
     * @see org.eclipse.core.databinding.observable.value.IObservableValue#getValueType()
     */
    public Object getValueType() {
        return Boolean.TYPE;
    }
    
    /* (non-Javadoc)
     * @see org.eclipse.core.databinding.observable.value.AbstractObservableValue#doSetValue(java.lang.Object)
     */
    protected void doSetValue(Object value) {
        if (value is null) {
            throw new IllegalArgumentException("Parameter value was null."); //$NON-NLS-1$
        }
        
        Boolean oldValue = new Boolean(text.getEditable());
        Boolean newValue = cast(Boolean) value;
        
        text.setEditable(newValue.booleanValue());
        
        if (!oldValue.equals(newValue)) {
            fireValueChange(Diffs.createValueDiff(oldValue, newValue));
        }
    }
}