MyStackRenderer.java

package com.example.e4.renderer.swt;

import org.eclipse.e4.ui.model.application.ui.MDirtyable;
import org.eclipse.e4.ui.model.application.ui.MUILabel;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.workbench.UIEvents;
import org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer;
import org.eclipse.swt.custom.CTabItem;

public class MyStackRenderer extends StackRenderer {
	
	protected void updateTab(CTabItem cti, MPart part, String attName,
			Object newValue) {
		if (UIEvents.UILabel.LABEL.equals(attName)) {
			String newName = (String) newValue;
			cti.setText(getLabel(part, newName));
		} else if (UIEvents.UILabel.ICONURI.equals(attName)) {
			cti.setImage(getImage(part));
		} else if (UIEvents.UILabel.TOOLTIP.equals(attName)) {
			String newTTip = (String) newValue;
			cti.setToolTipText(newTTip);
		} else if (UIEvents.Dirtyable.DIRTY.equals(attName)) {
			Boolean dirtyState = (Boolean) newValue;
			String text = cti.getText();
			boolean hasAsterisk = text.length() > 0 && text.charAt(0) == '!';
			if (dirtyState.booleanValue()) {
				if (!hasAsterisk) {
					cti.setText("* Demo *" + text);
				}
			} else if (hasAsterisk) {
				cti.setText(text.substring(1));
			}
		}
	}


	private String getLabel(MUILabel itemPart, String newName) {
		if (newName == null) {
			newName = ""; //$NON-NLS-1$
		}
		if (itemPart instanceof MDirtyable && ((MDirtyable) itemPart).isDirty()) {
			newName = '*' + newName;
		}
		return newName;
	}
}