/*******************************************************************************
 * Copyright (c) 2007 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.ecf.internal.mylyn.ui;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.*;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;

class SelectTaskDialog extends Dialog {

	private ListViewer viewer;

	private ITask task;

	private Object input;

	SelectTaskDialog(Shell shell) {
		super(shell);
	}

	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);
		newShell.setText("Task Selection");
	}

	public void create() {
		super.create();
		getButton(IDialogConstants.OK_ID).setEnabled(false);
	}

	public Control createDialogArea(Composite parent) {
		parent = (Composite) super.createDialogArea(parent);
		parent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		parent.setLayout(new GridLayout(1, true));

		viewer = new ListViewer(parent);
		viewer.getList().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		viewer.setContentProvider(new ArrayContentProvider());
		viewer.setLabelProvider(new LabelProvider() {
			public String getText(Object element) {
				String summary = ((ITask) element).getSummary();
				if (summary.length() > 30) {
					return summary.substring(0, 30) + "..."; //$NON-NLS-1$
				} else {
					return summary;
				}
			}
		});
		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				getButton(IDialogConstants.OK_ID).setEnabled(true);
			}
		});
		viewer.addOpenListener(new IOpenListener() {
			public void open(OpenEvent e) {
				okPressed();
			}
		});
		viewer.setInput(input);

		return parent;
	}

	protected Point getInitialSize() {
		Point point = super.getInitialSize();
		return new Point(point.x, 400);
	}

	protected void okPressed() {
		task = (ITask) ((IStructuredSelection) viewer.getSelection()).getFirstElement();
		super.okPressed();
	}

	void setInput(Object input) {
		this.input = input;
	}

	ITask getTask() {
		return task;
	}

}