bundles/org.eclipse.ui.glance/src/org/eclipse/ui/glance/controls/tree/BusyIndicatorUtils.java

/*******************************************************************************
 * Copyright (c) 2017 Exyte
 * 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:
 *     Yuri Strot - initial API and Implementation
 ******************************************************************************/
package org.eclipse.ui.glance.controls.tree;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class BusyIndicatorUtils {

	static final String BUSYID_NAME = "SWT BusyIndicator"; //$NON-NLS-1$
	static final Integer NO_BUSY = new Integer(0);

	public static void withoutIndicator(Display display, Runnable runnable) {
		if (runnable == null)
			SWT.error(SWT.ERROR_NULL_ARGUMENT);
		if (display == null) {
			display = Display.getCurrent();
			if (display == null) {
				runnable.run();
				return;
			}
		}

		Shell[] shells = display.getShells();
		for (int i = 0; i < shells.length; i++) {
			Integer id = (Integer) shells[i].getData(BUSYID_NAME);
			if (id == null) {
				shells[i].setData(BUSYID_NAME, NO_BUSY);
			}
		}

		try {
			runnable.run();
		} finally {
			shells = display.getShells();
			for (int i = 0; i < shells.length; i++) {
				Integer id = (Integer) shells[i].getData(BUSYID_NAME);
				if (id == NO_BUSY) {
					shells[i].setData(BUSYID_NAME, null);
				}
			}
		}
	}

}