ProgressBarManager.java

package Window;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.ProgressBar;

public class ProgressBarManager {
	private static ProgressBarManager _instance = null;

	private ProgressBarManager() {
		progressbarList = new ArrayList<ProgressBar>();
	}

	public synchronized static ProgressBarManager getInstance() {
		if (_instance == null)
			_instance = new ProgressBarManager();
		return _instance;
	}

	List<ProgressBar> progressbarList;

	public void add(ProgressBar pb) {
		progressbarList.add(pb);
	}

	private int lastsendValue = -1;

	public void setProgress(final int value) {
		if (Display.getDefault().isDisposed())
			return;

		if (lastsendValue == value)
			return;
		lastsendValue = value;
		Display.getDefault().asyncExec(new Runnable() {
			@Override
			public void run() {
				if (value < 0)
					for (ProgressBar pb : progressbarList) {
						if (pb.isDisposed() == false)
							pb.setVisible(false);
					}
				else
					for (ProgressBar pb : progressbarList) {
						if (pb.isDisposed() == false) {
							pb.setVisible(true);
							pb.setSelection(value);
						}
					}
			}
		});

	}

	public void remove(ProgressBar pb) {
		progressbarList.remove(pb);
	}
}