/*
* 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.internal.providers;
import java.text.NumberFormat;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipsetrader.core.feed.ILastClose;
import org.eclipsetrader.core.feed.IPrice;
import org.eclipsetrader.core.views.IDataProvider;
import org.eclipsetrader.core.views.IDataProviderFactory;
public class ChangePercentageFactory extends AbstractProviderFactory {
private NumberFormat formatter = NumberFormat.getInstance();
private Color positiveColor = Display.getDefault().getSystemColor(SWT.COLOR_GREEN);
private Color negativeColor = Display.getDefault().getSystemColor(SWT.COLOR_RED);
public class DataProvider implements IDataProvider {
public DataProvider() {
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProvider#init(org.eclipse.core.runtime.IAdaptable)
*/
@Override
public void init(IAdaptable adaptable) {
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProvider#getFactory()
*/
@Override
public IDataProviderFactory getFactory() {
return ChangePercentageFactory.this;
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProvider#getValue(org.eclipse.core.runtime.IAdaptable)
*/
@Override
public IAdaptable getValue(IAdaptable adaptable) {
ILastClose close = (ILastClose) adaptable.getAdapter(ILastClose.class);
IPrice price = (IPrice) adaptable.getAdapter(IPrice.class);
if (close != null && close.getPrice() != null && price != null && price.getPrice() != null) {
Double value = (price.getPrice() - close.getPrice()) / close.getPrice() * 100.0;
Color color = value != 0 ? value > 0 ? positiveColor : negativeColor : null;
return new NumberValue(value, (value > 0 ? "+" : "") + formatter.format(value) + "%", color);
}
return null;
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProvider#dispose()
*/
@Override
public void dispose() {
}
}
public ChangePercentageFactory() {
formatter.setGroupingUsed(true);
formatter.setMinimumIntegerDigits(1);
formatter.setMinimumFractionDigits(2);
formatter.setMaximumFractionDigits(2);
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProviderFactory#createProvider()
*/
@Override
public IDataProvider createProvider() {
return new DataProvider();
}
/* (non-Javadoc)
* @see org.eclipsetrader.core.views.IDataProviderFactory#getType()
*/
@Override
@SuppressWarnings("rawtypes")
public Class[] getType() {
return new Class[] {
Double.class, String.class,
};
}
}