org.eclipse.gmf.runtime.diagram.ui.printing.render/src/org/eclipse/gmf/runtime/diagram/ui/printing/render/dialogs/RangeBlock.java

/******************************************************************************
 * 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 org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.ComputedValue;
import org.eclipse.core.databinding.observable.value.IObservableValue;
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.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;


/**
 * A section of the JPS print dialog that adds range checking.
 * 
 * @author Christian Damus (cdamus)
 * @author James Bruck (jbruck)
 */
class RangeBlock extends DialogBlock {
	private final DataBindingContext bindings;
	private final PrintOptions options;

	RangeBlock(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.JPSPrintDialog_PrintRange);
		layout(result, 4);

		Button allRadio = radio(result,
				DiagramUIPrintingMessages.JPSPrintDialog_All);
		layoutSpanHorizontal(allRadio, 4);

		final IObservableValue allValue = BeansObservables.observeValue(realm,
				options, PrintOptions.PROPERTY_ALL_PAGES);
		bindings.bindValue(SWTObservables.observeSelection(allRadio), allValue,
				null, null);

		Button rangeRadio = radio(result,
				DiagramUIPrintingMessages.JPSPrintDialog_Pages);
		layoutSpanHorizontal(rangeRadio, 4);

		IObservableValue rangeValue = new ComputedValue(realm) {
			protected Object calculate() {
				return Boolean.valueOf(!((Boolean) allValue.getValue())
						.booleanValue());
			}
		};
		bindings.bindValue(SWTObservables.observeSelection(rangeRadio),
				rangeValue, null, null);

		layoutHorizontalIndent(label(result,
				DiagramUIPrintingMessages.JPSPrintDialog_From));
		Text textFrom = text(result, 20);
		
		layoutHorizontalIndent(label(result,
				DiagramUIPrintingMessages.JPSPrintDialog_To));
		Text textTo = text(result, 20);

		bindings.bindValue(SWTObservables.observeText(textFrom, SWT.Modify),
				BeansObservables.observeValue(realm, options,
						PrintOptions.PROPERTY_RANGE_FROM), null, null);
		bindings.bindValue(SWTObservables.observeEnabled(textFrom), rangeValue,
				null, null);
		bindings.bindValue(SWTObservables.observeText(textTo, SWT.Modify),
				BeansObservables.observeValue(realm, options,
						PrintOptions.PROPERTY_RANGE_TO), null, null);
		bindings.bindValue(SWTObservables.observeEnabled(textTo), rangeValue,
				null, null);

		return result;
	}
	
	@Override
	public void dispose() {
		// nothing special to dispose currently		
	}
}