/******************************************************************************
 * Copyright (c) 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.gmf.runtime.diagram.ui.printing.render.dialogs;

import java.util.Locale;

import javax.print.DocFlavor;
import javax.print.PrintService;
import javax.print.PrintServiceLookup;
import javax.print.attribute.AttributeSet;
import javax.print.attribute.HashPrintServiceAttributeSet;
import javax.print.attribute.PrintServiceAttributeSet;
import javax.print.attribute.standard.ColorSupported;
import javax.print.attribute.standard.PrinterName;

import org.eclipse.core.databinding.Binding;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.gmf.runtime.diagram.ui.printing.internal.l10n.DiagramUIPrintingMessages;
import org.eclipse.gmf.runtime.diagram.ui.printing.render.model.PrintOptions;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * A section of the options print dialog that handles the print color options.
 * 
 * @author James Bruck (jbruck)
 */
public class ColorBlock extends DialogBlock {

	private final DataBindingContext bindings;
	private final PrintOptions options;

	private Button colorRadio;
	private Button monoRadio;
	
	private Binding colorBinding;
	private Binding monoBinding;

	ColorBlock(IDialogUnitConverter dluConverter, DataBindingContext bindings,
			PrintOptions options) {
		super(dluConverter);

		this.bindings = bindings;
		this.options = options;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gmf.runtime.common.ui.printing.internal.dialogs.DialogBlock#createContents(org.eclipse.swt.widgets.Composite)
	 */
	public Control createContents(Composite parent) {
		final Realm realm = bindings.getValidationRealm();

		Composite result = group(parent,
				DiagramUIPrintingMessages.JPSOptionsDialog_Color);
		layout(result, 2);

		colorRadio = radio(result,
				DiagramUIPrintingMessages.JPSOptionsDialog_ChromaticityColor);
		layoutSpanHorizontal(colorRadio, 4);

		monoRadio = radio(
				result,
				DiagramUIPrintingMessages.JPSOptionsDialog_ChromaticityMonochrome);
		layoutSpanHorizontal(monoRadio, 4);

		colorBinding = bindings.bindValue(SWTObservables.observeSelection(colorRadio),
				BeansObservables.observeValue(realm, options,
						PrintOptions.PROPERTY_CHROMATICITY_COLOR), null, null);

		monoBinding = bindings.bindValue(SWTObservables.observeSelection(monoRadio),
				BeansObservables.observeValue(realm, options,
						PrintOptions.PROPERTY_CHROMATICITY_MONO), null, null);

		initializeControls(options.getDestination().getName());

		return result;
	}

	/**
	 * Initialize the enabled state of the controls based on the printer
	 * capabilities.
	 * 
	 * @param printerName
	 */
	private void initializeControls(String printerName) {

		AttributeSet attributes = new HashPrintServiceAttributeSet(
				new PrinterName(printerName, Locale.getDefault()));

		PrintService[] services = PrintServiceLookup.lookupPrintServices(
				DocFlavor.SERVICE_FORMATTED.PRINTABLE, attributes);

		PrintService printService = services[0];

		PrintServiceAttributeSet printServiceAttributes = printService
				.getAttributes();

		ColorSupported colorSupported = (ColorSupported) printServiceAttributes
				.get(ColorSupported.class);
		
		if (colorSupported == ColorSupported.SUPPORTED) {
			options.setChromaticityColor(true);
			options.setChromaticityMono(false);
			colorRadio.setEnabled(true);
		} else {
			options.setChromaticityColor(false);
			options.setChromaticityMono(true);
			colorRadio.setEnabled(false);
		}
	}
	
	@Override
	public void dispose() {
		bindings.removeBinding(colorBinding);
		colorBinding.dispose();
		bindings.removeBinding(monoBinding);
		monoBinding.dispose();
	}

}