/*
* Copyright (c) 2004-2011 Marco Maccaferri 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:
* Marco Maccaferri - initial API and implementation
*/
package org.eclipsetrader.ui;
import java.text.NumberFormat;
import java.text.ParseException;
import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.AbstractObservableValue;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.property.value.ValueProperty;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ICellEditorListener;
public class CellEditorLongValueProperty extends ValueProperty {
NumberFormat numberFormat = NumberFormat.getInstance();
private class CellEditorObservable extends AbstractObservableValue {
final CellEditor cellEditor;
Object oldValue;
final ICellEditorListener cellEditorListener = new ICellEditorListener() {
@Override
public void applyEditorValue() {
}
@Override
public void cancelEditor() {
}
@Override
public void editorValueChanged(boolean oldValidState, boolean newValidState) {
fireChangeEvent();
}
};
public CellEditorObservable(Realm realm, CellEditor cellEditor) {
this.cellEditor = cellEditor;
cellEditor.addListener(cellEditorListener);
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.observable.AbstractObservable#dispose()
*/
@Override
public synchronized void dispose() {
cellEditor.removeListener(cellEditorListener);
super.dispose();
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.observable.value.IObservableValue#getValueType()
*/
@Override
public Object getValueType() {
return Long.TYPE;
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.observable.value.AbstractObservableValue#doSetValue(java.lang.Object)
*/
@Override
protected void doSetValue(Object value) {
if (value instanceof Number) {
cellEditor.setValue(numberFormat.format(value));
oldValue = value;
}
else {
cellEditor.setValue("");
oldValue = null;
}
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.observable.value.AbstractObservableValue#doGetValue()
*/
@Override
protected Object doGetValue() {
String text = (String) cellEditor.getValue();
try {
if (text != null && !"".equals(text)) {
return numberFormat.parse(text).longValue();
}
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
private void fireChangeEvent() {
Object newValue = doGetValue();
if (!equals(oldValue, newValue)) {
fireValueChange(Diffs.createValueDiff(oldValue, newValue));
oldValue = newValue;
}
}
private boolean equals(final Object left, final Object right) {
return left == null ? right == null : ((right != null) && left.equals(right));
}
}
public CellEditorLongValueProperty() {
numberFormat.setGroupingUsed(false);
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.property.value.IValueProperty#getValueType()
*/
@Override
public Object getValueType() {
return Long.TYPE;
}
/* (non-Javadoc)
* @see org.eclipse.core.databinding.property.value.IValueProperty#observe(org.eclipse.core.databinding.observable.Realm, java.lang.Object)
*/
@Override
public IObservableValue observe(Realm realm, Object source) {
return new CellEditorObservable(realm, (CellEditor) source);
}
}