com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformViewer.java

@@ -46,6 +46,7 @@ import org.eclipse.swt.dnd.DropTargetEvent;
 import org.eclipse.swt.dnd.Transfer;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
+import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.MouseAdapter;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.events.MouseListener;
@@ -1249,4 +1250,9 @@ public class WaveformViewer implements IWaveformViewer  {
 			}
 		});
 	}
+	
+	/// probably not the way it should be done
+	public void addDisposeListener( DisposeListener listener ) {
+		waveformCanvas.addDisposeListener(listener);
+	}
 }

com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewer.java

@@ -17,6 +17,7 @@ import java.util.List;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Control;
 
@@ -104,4 +105,6 @@ public interface IWaveformViewer extends PropertyChangeListener, ISelectionProvi
 	public void setBaselineTime(Long scale);
 	
 	public void scrollHorizontal(int percent);
+	
+	public void addDisposeListener( DisposeListener listener );
 }

com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/DesignBrowser.java

@@ -49,6 +49,8 @@ import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.SashForm;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.PaintEvent;
@@ -345,6 +347,16 @@ public class DesignBrowser {
 		updateButtons();
 	}
 	
+	/** 
+	 * reset tree viewer and tableviewer after every closed tab
+	 */
+	protected void resetTreeViewer() {
+		//reset tree- and tableviewer
+		treeViewer.setInput(null);
+		txTableViewer.setInput(null);
+		txTableViewer.setSelection(null);
+	}
+
 	/**
 	 * Gets the status event.
 	 *
@@ -354,14 +366,24 @@ public class DesignBrowser {
 	@SuppressWarnings("unchecked")
 	@Inject @Optional
 	public void  getActiveWaveformViewerEvent(@UIEventTopic(WaveformViewer.ACTIVE_WAVEFORMVIEW) WaveformViewer waveformViewerPart) {
-		if(this.waveformViewerPart!=null)
+		if(this.waveformViewerPart!=null) { 
 			this.waveformViewerPart.storeDesignBrowerState(new DBState());
+		}
+		if( this.waveformViewerPart == null || this.waveformViewerPart != waveformViewerPart ) {
+			waveformViewerPart.addDisposeListener( new DisposeListener() {
+				@Override
+				public void widgetDisposed(DisposeEvent e) {
+					// reset tree- and tableviewer
+					resetTreeViewer();
+    			}
+			} );
+		}
 		this.waveformViewerPart=waveformViewerPart;
 		IWaveformDb database = waveformViewerPart.getDatabase();
 		Object input = treeViewer.getInput();
 		if(input!=null && input instanceof List<?>){
 			IWaveformDb db = ((List<IWaveformDb>)input).get(0);
-			if(db==database) return; // do nothing if old and new daabase is the same
+			if(db==database) return; // do nothing if old and new database is the same
 			((List<IWaveformDb>)input).get(0).removePropertyChangeListener(treeViewerPCL);
 		}
 		treeViewer.setInput(Arrays.asList(database.isLoaded()?new IWaveformDb[]{database}:new IWaveformDb[]{new LoadingWaveformDb()}));

com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/WaveformViewer.java

@@ -63,6 +63,8 @@ import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.events.MouseTrackListener;
 import org.eclipse.swt.events.MouseWheelListener;
@@ -72,7 +74,7 @@ import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Listener;
-
+import org.eclipse.swt.widgets.TypedListener;
 import com.minres.scviewer.database.ITx;
 import com.minres.scviewer.database.ITxEvent;
 import com.minres.scviewer.database.ITxRelation;
@@ -101,7 +103,7 @@ import com.minres.scviewer.e4.application.preferences.PreferenceConstants;
  * The Class WaveformViewerPart.
  */
 @SuppressWarnings("restriction")
-public class WaveformViewer implements IFileChangeListener, IPreferenceChangeListener {
+public class WaveformViewer implements IFileChangeListener, IPreferenceChangeListener, DisposeListener {
 
 	/** The Constant ACTIVE_WAVEFORMVIEW. */
 	public static final String ACTIVE_WAVEFORMVIEW = "Active_Waveform_View"; //$NON-NLS-1$
@@ -149,6 +151,9 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	/** The Constant WAVE_ACTION_ID. */
 	public static final String WAVE_ACTION_ID = "com.minres.scviewer.ui.action.AddToWave"; //$NON-NLS-1$
 
+	/** The number of active DisposeListeners */
+	private static int disposeListenerNumber = 0;
+	
 	/** The factory. */
 	WaveformViewerFactory factory = new WaveformViewerFactory();
 
@@ -179,6 +184,8 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	@Preference(nodePath = PreferenceConstants.PREFERENCES_SCOPE)
 	IEclipsePreferences prefs;
 	
+	@Inject @Optional DesignBrowser designBrowser;
+
 	/** The database. */
 	private IWaveformDb database;
 
@@ -221,6 +228,8 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	 */
 	@PostConstruct
 	public void createComposite(MPart part, Composite parent, IWaveformDbFactory dbFactory) {
+		disposeListenerNumber += 1;
+				
 		myPart = part;
 		myParent = parent;
 		database = dbFactory.getDatabase();
@@ -393,6 +402,8 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 			}
 		});
 		prefs.addPreferenceChangeListener(this);
+		
+		waveformPane.addDisposeListener(this);
 	}
 
 	/* (non-Javadoc)
@@ -1185,4 +1196,28 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 		waveformPane.update();
 	}
 
+	/**
+	 * add dispose listener
+	 * 
+	 * @param listener
+	 */
+	public void addDisposeListener (DisposeListener listener) {
+		waveformPane.getControl().addDisposeListener(listener);
+	}
+
+	/**
+	 * triggers included actions if widget is disposed
+	 * 
+	 * @param e
+	 */
+    public void widgetDisposed(DisposeEvent e) {
+    	disposeListenerNumber -= 1;
+    	if( disposeListenerNumber == 0) {  //if the last tab is closed, reset statusbar
+			eventBroker.post(WaveStatusBarControl.ZOOM_LEVEL, null);
+			eventBroker.post(WaveStatusBarControl.CURSOR_TIME, null);
+			eventBroker.post(WaveStatusBarControl.MARKER_TIME, null);
+			eventBroker.post(WaveStatusBarControl.MARKER_DIFF, null);
+    	}
+    }
+
 }