/*******************************************************************************
* Copyright (c) 2000, 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
*******************************************************************************/
package org.eclipse.jdt.internal.ui.refactoring.nls;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.CellEditor;
public class MultiStateCellEditor extends CellEditor {
private int fValue;
private final int fStateCount;
/**
* @param stateCount must be > 1
* @param initialValue initialValue
*/
public MultiStateCellEditor(Composite parent, int stateCount, int initialValue) {
super(parent);
Assert.isTrue(stateCount > 1, "incorrect state count"); //$NON-NLS-1$
fStateCount= stateCount;
Assert.isTrue(initialValue >= 0 && initialValue < stateCount, "incorrect initial value"); //$NON-NLS-1$
fValue= initialValue;
setValueValid(true);
}
/*
* @see org.eclipse.jface.viewers.CellEditor#activate()
*/
public void activate() {
fValue= getNextValue(fStateCount, fValue);
fireApplyEditorValue();
}
public static int getNextValue(int stateCount, int currentValue){
Assert.isTrue(stateCount > 1, "incorrect state count"); //$NON-NLS-1$
Assert.isTrue(currentValue >= 0 && currentValue < stateCount, "incorrect initial value"); //$NON-NLS-1$
return (currentValue + 1) % stateCount;
}
/*
* @see org.eclipse.jface.viewers.CellEditor#createControl(org.eclipse.swt.widgets.Composite)
*/
protected Control createControl(Composite parent) {
return null;
}
/*
* @see org.eclipse.jface.viewers.CellEditor#doGetValue()
* @return the Integer value
*/
protected Object doGetValue() {
return new Integer(fValue);
}
/*
* @see org.eclipse.jface.viewers.CellEditor#doSetFocus()
*/
protected void doSetFocus() {
// Ignore
}
/*
* @see org.eclipse.jface.viewers.CellEditor#doSetValue(java.lang.Object)
* @param value an Integer value
* must be >=0 and < stateCount (value passed in the constructor)
*/
protected void doSetValue(Object value) {
Assert.isTrue(value instanceof Integer, "value must be Integer"); //$NON-NLS-1$
fValue = ((Integer) value).intValue();
Assert.isTrue(fValue >= 0 && fValue < fStateCount, "invalid value"); //$NON-NLS-1$
}
}
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