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/*******************************************************************************
* Copyright (c) 2009, 2010 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.ui.internal.utility.swt;
import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
import org.eclipse.swt.widgets.Control;
/**
* This controller enables a boolean model to control either the
* <em>enabled</em> or <em>visible</em> properties of an SWT control; i.e. the
* control's property is kept in synch with the boolean model,
* but <em>not</em> vice-versa.
* <p>
* Once the control is disposed, this controller is kaput.
*
* @see PropertyValueModel
* @see Control#setEnabled(boolean)
* @see Control#setVisible(boolean)
*/
final class SimpleBooleanStateController
extends BooleanStateController
{
private final Control control;
// ********** constructor **********
/**
* Constructor - the boolean model, the control, and the adapter are required.
*/
SimpleBooleanStateController(
PropertyValueModel<Boolean> booleanModel,
Control control,
boolean defaultValue,
Adapter adapter
) {
super(booleanModel, defaultValue, adapter);
if (control == null) {
throw new NullPointerException();
}
this.control = control;
this.engageBooleanModel();
this.engageControl(control);
this.setControlState(control, this.getBooleanValue());
}
// ********** controls **********
@Override
void setControlState(boolean b) {
this.setControlState(this.control, b);
}
@Override
void controlDisposed(Control c) {
super.controlDisposed(c);
this.disengageBooleanModel();
}
}
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