/*******************************************************************************
 * Copyright (c) 2003, 2005 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.gef.examples.logicdesigner.actions;

import java.io.InputStream;
import java.io.ObjectInputStream;

import org.eclipse.swt.SWT;
import org.eclipse.swt.printing.PrintDialog;
import org.eclipse.swt.printing.Printer;
import org.eclipse.swt.printing.PrinterData;
import org.eclipse.swt.widgets.Shell;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;

import org.eclipse.gef.DefaultEditDomain;
import org.eclipse.gef.GraphicalViewer;
import org.eclipse.gef.editparts.ScalableFreeformRootEditPart;
import org.eclipse.gef.print.PrintGraphicalViewerOperation;
import org.eclipse.gef.ui.parts.ScrollingGraphicalViewer;

import org.eclipse.gef.examples.logicdesigner.edit.GraphicalPartFactory;

/**
 * @author Eric Bordeau
 */
public class LogicPrintAction 
	extends Action 
	implements IObjectActionDelegate
{

private Object contents;
private IFile selectedFile;

public LogicPrintAction() {}

protected Object getContents() {
	return contents;
}

/**
 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
 */
public void setActivePart(IAction action, IWorkbenchPart targetPart) {}

/**
 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
 */
public void run(IAction action) {
	int style = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().getStyle();
	Shell shell = new Shell((style & SWT.MIRRORED) != 0 ? SWT.RIGHT_TO_LEFT : SWT.NONE);
	GraphicalViewer viewer = new ScrollingGraphicalViewer();
	viewer.createControl(shell);
	viewer.setEditDomain(new DefaultEditDomain(null));
	viewer.setRootEditPart(new ScalableFreeformRootEditPart());
	viewer.setEditPartFactory(new GraphicalPartFactory());
	viewer.setContents(getContents());
	viewer.flush();
	
	int printMode = new PrintModeDialog(shell).open();
	if (printMode == -1)
		return;
	PrintDialog dialog = new PrintDialog(shell, SWT.NULL);
	PrinterData data = dialog.open();
	if (data != null) {
		PrintGraphicalViewerOperation op = 
					new PrintGraphicalViewerOperation(new Printer(data), viewer);
		op.setPrintMode(printMode);
		op.run(selectedFile.getName());
	}
}

/**
 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
 */
public void selectionChanged(IAction action, ISelection selection) {
	if (!(selection instanceof IStructuredSelection))
		return;
	IStructuredSelection sel = (IStructuredSelection)selection;
	if (sel.size() != 1)
		return;
	selectedFile = (IFile)sel.getFirstElement();
	try {
		InputStream is = selectedFile.getContents(false);
		ObjectInputStream ois = new ObjectInputStream(is);
		setContents(ois.readObject());
		ois.close();
	} catch (Exception e) {
		//This is just an example.  All exceptions caught here.
		e.printStackTrace();
	}
	
}

protected void setContents(Object o) {
	contents = o;
}

}