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/*******************************************************************************
* Copyright (c) 2008 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.ui.internal.util;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.iterators.TransformationIterator;
import org.eclipse.jpt.utility.model.value.PropertyValueModel;
import org.eclipse.swt.widgets.Control;
/**
* This <code>ControlVisibilityEnabler</code> keeps the "visible" state of a
* collection of controls in synch with the provided boolean holder.
*
* @version 2.0
* @since 2.0
*/
public class ControlVisibilityEnabler extends StateController
{
/**
* Creates a new <code>ControlVisibilityEnabler</code> with a default value
* of <code>false</code> (i.e. not visible).
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls The collection of controls whose "visible" state is
* kept in sync with the boolean holder's value
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Collection<? extends Control> controls) {
this(booleanHolder, controls, false);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code>.
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls The collection of controls whose "visible" state is
* kept in sync with the boolean holder's value
* @param defaultValue The value to use when the underlying model is
* <code>null</code>
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Collection<? extends Control> controls,
boolean defaultValue) {
this(booleanHolder, controls.iterator(), defaultValue);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code> with a default value of
* <code>false</code> (i.e. not visible).
*
* @param booleanHolder A value model on the underlying boolean model
* @param control The control whose "visible" state is
* kept in sync with the boolean holder's value
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Control control) {
this(booleanHolder, control, false);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code> with a default value of
* <code>false</code> (i.e. not visible).
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls The collection of controls whose "visible" state is
* kept in sync with the boolean holder's value
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Control... controls) {
this(booleanHolder, CollectionTools.iterator(controls), false);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code>.
*
* @param booleanHolder A value model on the underlying boolean model
* @param control The control whose "visible" state is kept in sync with the
* boolean holder's value
* @param defaultValue The value to use when the underlying model is
* <code>null</code>
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Control control,
boolean defaultValue) {
this(booleanHolder, CollectionTools.singletonIterator(control), false);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code>.
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls The collection of controls whose "visible" state is kept
* in sync with the boolean holder's value
* @param defaultValue The value to use when the underlying model is
* <code>null</code>
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Control[] controls,
boolean defaultValue) {
this(booleanHolder, CollectionTools.iterator(controls), defaultValue);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code> with a default value
* of <code>false</code> (i.e. not visible).
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls An iterator on the collection of controls whose "visible"
* state is kept in sync with the boolean holder's value
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Iterator<? extends Control> controls) {
this(booleanHolder, controls, false);
}
/**
* Creates a new <code>ControlVisibilityEnabler</code>.
*
* @param booleanHolder A value model on the underlying boolean model
* @param controls An iterator on the collection of controls whose "visible"
* state is kept in sync with the boolean holder's value
* @param defaultValue The value to use when the underlying model is
* <code>null</code>
*/
public ControlVisibilityEnabler(PropertyValueModel<Boolean> booleanHolder,
Iterator<? extends Control> controls,
boolean defaultValue) {
super(booleanHolder, wrap(controls), defaultValue);
}
private static Collection<ControlHolder> wrap(Iterator<? extends Control> controls) {
return CollectionTools.collection(new TransformationIterator<Control, ControlHolder>(controls) {
@Override
protected ControlHolder transform(Control control) {
return new ControlVisibilityHolder(control);
}
});
}
/**
* This holder holds onto a <code>Control</code> and update its visible state.
*/
private static class ControlVisibilityHolder implements ControlHolder {
private final Control control;
ControlVisibilityHolder(Control control) {
super();
this.control = control;
}
public void updateState(boolean state) {
if (!this.control.isDisposed()) {
this.control.setVisible(state);
}
}
}
}
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