Bug 405390 - [Visualizer] Implement selection-based filtering of the

multicore visualizer display

Change-Id: I516af7e4b625add754eaa1713ddc562a33f15c79
Reviewed-on: https://git.eclipse.org/r/12138
Reviewed-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
IP-Clean: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Tested-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/resources/messages.properties

@@ -1,5 +1,5 @@
 # =============================================================================
-# Copyright (c) 2012 Tilera Corporation and others.
+# Copyright (c) 2012, 2013 Tilera 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
@@ -8,6 +8,7 @@
 # Contributors:
 #     William R. Swanson (Tilera Corporation)
 #     Marc Dumais (Ericsson) - Add CPU/core load information to the multicore visualizer (Bug 396268)
+#     Marc Dumais (Ericsson) - Bug 405390
 # =============================================================================
 
 # -----------------------------------------------------------------------------
@@ -32,3 +33,11 @@ MulticoreVisualizer.actions.SetLoadMeterPeriod.description=Choose the refresh sp
 
 MulticoreVisualizer.actions.LoadMeterSubmenu.text=Load Meters
 MulticoreVisualizer.actions.LoadMetersRefreshSubSubmenu.text=Refresh Speed
+
+MulticoreVisualizer.actions.ClearFilter.text=Clear filter
+MulticoreVisualizer.actions.SetFilter.text=Filter to selection
+MulticoreVisualizer.view.CanvasFilter.Active.text=Filter Active: 
+MulticoreVisualizer.view.CanvasFilter.cpu.text=CPUs:
+MulticoreVisualizer.view.CanvasFilter.core.text=Cores:
+MulticoreVisualizer.view.CanvasFilter.thread.text=Threads:
+MulticoreVisualizer.view.CanvasFilter.NotActive.text=Filter not active

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/actions/FilterCanvasAction.java

@@ -0,0 +1,72 @@
+/*******************************************************************************
+ * Copyright (c) 2013 Ericsson
+ * 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:
+ *     Marc Dumais (Ericsson) - Initial API and implementation (Bug 405390)
+ *******************************************************************************/
+
+package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions;
+
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.MulticoreVisualizerUIPlugin;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view.MulticoreVisualizer;
+import org.eclipse.cdt.visualizer.ui.VisualizerAction;
+
+/**
+ * @since 1.1
+ */
+public class FilterCanvasAction extends VisualizerAction {
+
+	/** Visualizer instance we're associated with. */
+	MulticoreVisualizer m_visualizer = null;
+	boolean m_haveFilter = false;
+	
+
+	/**
+	 * @param filterType: the type of canvas object the filter applies-to.  If null, reset filter
+	 */
+	public FilterCanvasAction(boolean enable) {	
+		m_haveFilter = enable;
+		if (m_haveFilter) {
+			setText(MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.actions.SetFilter.text")); //$NON-NLS-1$
+		}
+		else {
+			setText(MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.actions.ClearFilter.text")); //$NON-NLS-1$
+		}
+	}
+
+	/** Dispose method. */
+	@Override
+	public void dispose()
+	{
+		m_visualizer = null;
+		super.dispose();
+	}
+
+	// --- init methods ---
+
+	/** Initializes this action for the specified view. */
+	public void init(MulticoreVisualizer visualizer)
+	{
+		m_visualizer = visualizer;
+	}
+
+
+	// --- methods ---
+
+	/** Invoked when action is triggered. */
+	@Override
+	public void run() {
+		if (m_visualizer != null) {
+			if (m_haveFilter) {
+				m_visualizer.applyCanvasFilter();
+			}
+			else {
+				m_visualizer.clearCanvasFilter();
+			}
+		}
+	}
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/model/IVisualizerModelObject.java

@@ -0,0 +1,25 @@
+/*******************************************************************************
+ * Copyright (c) 2013 Ericsson
+ * 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:
+ *     Marc Dumais (Ericsson) - Initial API and implementation (Bug 405390)
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model;
+
+/**
+ * Common interface for visualizer model objects
+ */
+public interface IVisualizerModelObject {
+	/** Get the ID of this model object */	
+	public int getID();
+	
+	/** Get the parent of this model object*/
+	public IVisualizerModelObject getParent();	
+	
+	/** Compare two IVisualizerModelObject */
+	public int compareTo(IVisualizerModelObject o);
+}

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/model/VisualizerCPU.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -8,6 +8,7 @@
  * Contributors:
  *     William R. Swanson (Tilera Corporation) - initial API and implementation
  *     Marc Dumais (Ericsson) - Add CPU/core load information to the multicore visualizer (Bug 396268)
+ *     Marc Dumais (Ericsson) -  Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model;
@@ -23,7 +24,7 @@ import java.util.List;
 
 /** Represents single CPU. */
 public class VisualizerCPU
-	implements Comparable<VisualizerCPU>
+	implements Comparable<VisualizerCPU>, IVisualizerModelObject
 {
 	// --- members ---
 	
@@ -78,10 +79,17 @@ public class VisualizerCPU
 	// --- accessors ---
 	
 	/** Gets ID of this CPU. */
+	@Override
 	public int getID() {
 		return m_id;
 	}
 	
+	/** CPU has no parent  - always returns null */
+	@Override
+	public IVisualizerModelObject getParent() {
+		return null;
+	}
+	
 	/** sets the load info for this CPU 
 	 * @since 1.1*/
 	public synchronized void setLoadInfo (VisualizerLoadInfo info) {
@@ -154,4 +162,14 @@ public class VisualizerCPU
 		return result;
 	}
 	
+	/** IVisualizerModelObject version of compareTO() */
+	@Override
+	public int compareTo(IVisualizerModelObject o) {
+		if (o != null) {
+			if (o.getClass() == this.getClass()) {
+				return compareTo((VisualizerCPU)o);
+			}
+		}
+		return 1;
+	}
 }

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/model/VisualizerCore.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -8,13 +8,15 @@
  * Contributors:
  *     William R. Swanson (Tilera Corporation) - initial API and implementation
  *     Marc Dumais (Ericsson) - Add CPU/core load information to the multicore visualizer (Bug 396268)
+ *     Marc Dumais (Ericsson) -  Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model;
 
+
 /** Represents single core of a CPU. */
 public class VisualizerCore
-	implements Comparable<VisualizerCore>
+	implements Comparable<VisualizerCore>, IVisualizerModelObject
 {
 	// --- members ---
 	
@@ -60,10 +62,17 @@ public class VisualizerCore
 	}
 
 	/** Gets Linux CPU ID of this core. */
+	@Override
 	public int getID() {
 		return m_id;
 	}
 	
+	/**  Return CPU this core is on. */
+	@Override
+	public IVisualizerModelObject getParent() {
+		return getCPU();
+	}
+	
 	/** sets the load info for this core 
 	 * @since 1.1*/
 	public synchronized void setLoadInfo (VisualizerLoadInfo info) {
@@ -103,5 +112,16 @@ public class VisualizerCore
 		}
 		return result;
 	}
+
+	/** IVisualizerModelObject version of compareTO() */
+	@Override
+	public int compareTo(IVisualizerModelObject o) {
+		if (o != null) {
+			if (o.getClass() == this.getClass()) {
+				return compareTo((VisualizerCore)o);
+			}
+		}
+		return 1;
+	}
 	
 }

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/model/VisualizerModel.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -7,7 +7,7 @@
  *
  * Contributors:
  *     William R. Swanson (Tilera Corporation) - initial API and implementation
- *     Marc Dumais (Ericsson) - Initial API and implementation (Bug 396268)
+ *     Marc Dumais (Ericsson) - Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model;
@@ -127,6 +127,21 @@ public class VisualizerModel
 		return m_cpus.size();
 	}
 	
+	/** Gets number of cores. */
+	public int getCoreCount() {
+		int count = 0;
+		
+		for(VisualizerCPU cpu : m_cpus) {
+			count += cpu.getCoreCount();
+		}
+		return count;
+	}
+	
+	/** Gets number of threads. */
+	public int getThreadCount () {
+		return m_threads.size();
+	}
+	
 	/** Gets CPU with specified ID. */
 	public VisualizerCPU getCPU(int id) {
 		return m_cpuMap.get(id);

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/model/VisualizerThread.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -9,13 +9,15 @@
  *     William R. Swanson (Tilera Corporation) - initial API and implementation
  *     Marc Khouzam (Ericsson)                 - Added knowledge about execution 
  *                                               state and os/gdb thread ids
+ *     Marc Dumais (Ericsson) -  Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model;
 
+
 /** Represents single thread. */
 public class VisualizerThread
-	implements Comparable<VisualizerThread>
+	implements Comparable<VisualizerThread>, IVisualizerModelObject
 {
 	// --- members ---
 	
@@ -113,6 +115,18 @@ public class VisualizerThread
 		return m_tid;
 	}
 
+	/** Gets thread id (tid). */
+	@Override
+	public int getID() {
+		return getTID();
+	}
+
+	/** Return core the thread is on */
+	@Override
+	public IVisualizerModelObject getParent() {
+		return getCore();
+	}
+	
 	/** Gets gdb thread id. */
 	public int getGDBTID()	{
 		return m_gdbtid;
@@ -155,4 +169,15 @@ public class VisualizerThread
 		}
 		return result;
 	}
+	
+	/** IVisualizerModelObject version of compareTo() */
+	@Override
+	public int compareTo(IVisualizerModelObject o) {
+		if (o != null) {
+			if (o.getClass() == this.getClass()) {
+				return compareTo((VisualizerThread)o);
+			}
+		}
+		return 1;
+	}
 }

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/IMulticoreVisualizerConstants.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Ericsson and others.
+ * Copyright (c) 2012, 2013 Ericsson 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
@@ -76,6 +76,9 @@ public class IMulticoreVisualizerConstants
 	 */
 	public static final Color COLOR_LOAD_TEXT = Colors.GREEN;
 	
+	/** Color used to draw text to the status bar */
+	public static final Color COLOR_STATUS_BAR_TEXT = Colors.GREEN;
+	
 	// Colors for load meters
 	
 	/**

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/MulticoreVisualizer.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -11,6 +11,7 @@
  *     Marc Dumais (Ericsson) - Bug 399281
  *     Marc Dumais (Ericsson) - Add CPU/core load information to the multicore visualizer (Bug 396268)
  *     Marc Dumais (Ericsson) - Bug 399419
+ *     Marc Dumais (Ericsson) - Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view;
@@ -29,6 +30,7 @@ import org.eclipse.cdt.dsf.gdb.launching.GDBProcess;
 import org.eclipse.cdt.dsf.gdb.launching.GdbLaunch;
 import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.MulticoreVisualizerUIPlugin;
 import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions.EnableLoadMetersAction;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions.FilterCanvasAction;
 import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions.RefreshAction;
 import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions.SelectAllAction;
 import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.actions.SetLoadMeterPeriodAction;
@@ -197,6 +199,11 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 	/** Menu action */
 	List<SetLoadMeterPeriodAction> m_setLoadMeterPeriodActions = null;
 	
+	/** Menu action */
+	FilterCanvasAction m_setFilterAction = null;
+
+	/** Menu action */
+	FilterCanvasAction m_clearFilterAction = null;	
 
 	// --- constructors/destructors ---
 	
@@ -339,6 +346,23 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 		return (MulticoreVisualizerCanvas) getCanvas();
 	}
 	
+	/** Sets-up a canvas filter */
+	public void applyCanvasFilter() {
+		m_canvas.applyFilter();
+		refresh();
+	}
+	
+	/** Removes current canvas filter */
+	public void clearCanvasFilter() {
+		m_canvas.clearFilter();
+		refresh();
+	}
+
+	/** Tells if a canvas filter is in effect */
+	public boolean isCanvasFilterActive() {
+		return m_canvas.isFilterActive();
+	}
+	
 	/** Return the data model backing this multicore visualizer */
 	public VisualizerModel getModel() {
 		return fDataModel;
@@ -415,6 +439,16 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 		defaultAction.setChecked(true);
 		defaultAction.run();
 		
+		// canvas filter actions - they will be dynamically enabled/disabled
+		// according to canvas selection
+		m_setFilterAction = new FilterCanvasAction(true);
+		m_setFilterAction.init(this);
+		m_setFilterAction.setEnabled(false);
+
+		m_clearFilterAction = new FilterCanvasAction(false);
+		m_clearFilterAction.init(this);
+		m_clearFilterAction.setEnabled(false);
+		
 		// Note: debug view may not be initialized at startup,
 		// so we'll pretend the actions are not yet updated,
 		// and reinitialize them later.
@@ -429,6 +463,13 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 		boolean enabled = hasSelection();
 		m_selectAllAction.setEnabled(enabled);
 		m_refreshAction.setEnabled(enabled);
+				
+		// enable "filter-to selection" menu item if there is a 
+		// canvas selection
+		m_setFilterAction.setEnabled(m_canvas.hasSelection());
+		
+		// enable "Clear filter" menu item if filter is active
+		m_clearFilterAction.setEnabled(isCanvasFilterActive());
 		
     	// show the load meter refresh speed sub-menu only 
     	// if the load meters are enabled
@@ -515,6 +556,16 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 			m_setLoadMeterPeriodActions = null;
 		}
 		
+		if (m_setFilterAction != null) {
+			m_setFilterAction.dispose();
+			m_setFilterAction = null;
+		}
+
+		if (m_clearFilterAction != null) {
+			m_clearFilterAction.dispose();
+			m_clearFilterAction = null;
+		}
+
 		m_actionsInitialized = false;
 	}
 
@@ -592,6 +643,11 @@ public class MulticoreVisualizer extends GraphicCanvasVisualizer
 			m_loadMetersRefreshSubSubmenu.add(act);
 		}
 		
+		// add filtering options
+		menuManager.add(m_separatorAction);
+		menuManager.add(m_setFilterAction);
+		menuManager.add(m_clearFilterAction);
+		
 		updateActions();
 		Point location = m_viewer.getContextMenuLocation();
 		updateContextMenuActions(location);

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/MulticoreVisualizerCanvas.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Tilera Corporation and others.
+ * Copyright (c) 2012, 2013 Tilera 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
@@ -15,6 +15,7 @@
  *     Marc Dumais (Ericsson) - Add CPU/core load information to the multicore visualizer (Bug 396268)
  *     Marc Dumais (Ericsson) - Bug 399419
  *     Marc Dumais (Ericsson) - Bug 404894
+ *     Marc Dumais (Ericsson) - Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view;
@@ -139,6 +140,11 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 	/** Selected PIDs. */
 	protected HashSet<Integer> m_selectedPIDs = null;
 	
+	/** Display filter for the graphical objects */
+	protected MulticoreVisualizerCanvasFilter m_canvasFilter = null;
+	
+	/** Canvas status bar */
+	protected MulticoreVisualizerStatusBar m_statusBar = null;
 
 	// --- constructors/destructors ---
 	
@@ -228,6 +234,12 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 		};
 		m_updateTimer.setRepeating(false); // one-shot timer
 		m_updateTimer.start();
+		
+		// canvas filter
+		m_canvasFilter = new MulticoreVisualizerCanvasFilter(this);
+		
+		// status bar
+		m_statusBar = new MulticoreVisualizerStatusBar();
 	}
 	
 	/** Cleans up control */
@@ -276,6 +288,14 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
         	m_selectedPIDs.clear();
         	m_selectedPIDs = null;
         }
+        if (m_canvasFilter != null) {
+        	m_canvasFilter.dispose();
+        	m_canvasFilter = null;
+        }
+        if (m_statusBar != null) {
+        	m_statusBar.dispose();
+        	m_statusBar = null;
+        }
 	}
 	
 
@@ -291,6 +311,8 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 	public void setModel(VisualizerModel model)
 	{
 		m_model = model;
+		// TODO : Consider clearing the filter if the model changes,
+		// by calling clearFilter() 
 		requestRecache();
 		requestUpdate();
 	}
@@ -355,6 +377,10 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 		m_recacheState |= state;
 		m_recacheSizes |= sizes;
 		m_recacheLoadMeters |= load;
+		// clear status bar message
+		m_statusBar.setMessage(null);
+		// re-compute filter to reflect latest model changes
+		m_canvasFilter.updateFilter();
 	}
 	
 	/** Fits n square items into a rectangle of the specified size.
@@ -411,13 +437,19 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 				for (VisualizerCPU cpu : m_model.getCPUs()) {
 					//if (force_cpu_count >= cpu_count) break;
 					//cpu_count++;
-					MulticoreVisualizerCPU mcpu = new MulticoreVisualizerCPU(cpu.getID());
-					m_cpus.add(mcpu);
-					m_cpuMap.put(cpu, mcpu);
-					for (VisualizerCore core : cpu.getCores()) {
-						MulticoreVisualizerCore mcore = new MulticoreVisualizerCore(mcpu, core.getID());
-						m_cores.add(mcore);
-						m_coreMap.put(core, mcore);
+					// filter permits displaying this CPU? 
+					if (m_canvasFilter.displayObject(cpu)) {
+						MulticoreVisualizerCPU mcpu = new MulticoreVisualizerCPU(cpu.getID());
+						m_cpus.add(mcpu);
+						m_cpuMap.put(cpu, mcpu);
+						for (VisualizerCore core : cpu.getCores()) {
+							// filter permits displaying this core?
+							if (m_canvasFilter.displayObject(core)) {
+								MulticoreVisualizerCore mcore = new MulticoreVisualizerCore(mcpu, core.getID());
+								m_cores.add(mcore);
+								m_coreMap.put(core, mcore);
+							}
+						}
 					}
 				}
 			}
@@ -442,19 +474,25 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 				while (modelCpus.hasMoreElements()) {
 					VisualizerCPU modelCpu = modelCpus.nextElement();
 					MulticoreVisualizerCPU visualizerCpu = m_cpuMap.get(modelCpu);
-					// update CPUs load meter 
-					MulticoreVisualizerLoadMeter meter = visualizerCpu.getLoadMeter();
-					meter.setEnabled(m_model.getLoadMetersEnabled());
-					meter.setLoad(modelCpu.getLoad());
-					meter.setHighLoadWatermark(modelCpu.getHighLoadWatermark());
-					
-					for (VisualizerCore modelCore : modelCpu.getCores()) {
-						MulticoreVisualizerCore visualizerCore = m_coreMap.get(modelCore);
-						// update cores load meter
-						meter = visualizerCore.getLoadMeter();
+					// when filtering is active, not all objects might be in the map
+					if (visualizerCpu != null) {
+						// update CPUs load meter 
+						MulticoreVisualizerLoadMeter meter = visualizerCpu.getLoadMeter();
 						meter.setEnabled(m_model.getLoadMetersEnabled());
-						meter.setLoad(modelCore.getLoad());
-						meter.setHighLoadWatermark(modelCore.getHighLoadWatermark());
+						meter.setLoad(modelCpu.getLoad());
+						meter.setHighLoadWatermark(modelCpu.getHighLoadWatermark());
+
+						for (VisualizerCore modelCore : modelCpu.getCores()) {
+							MulticoreVisualizerCore visualizerCore = m_coreMap.get(modelCore);
+							// when filtering is active, not all objects might be in the map
+							if (visualizerCore != null) {
+								// update cores load meter
+								meter = visualizerCore.getLoadMeter();
+								meter.setEnabled(m_model.getLoadMetersEnabled());
+								meter.setLoad(modelCore.getLoad());
+								meter.setHighLoadWatermark(modelCore.getHighLoadWatermark());
+							}
+						}
 					}
 				}
 			}
@@ -474,6 +512,14 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 			// General margin/spacing constants.
 			int cpu_margin = 8;       // margin around edges of CPU grid
 			int cpu_separation = 6;   // spacing between CPUS
+			int statusBarHeight;
+			// reserve space for status bar only if filter is active
+			if (isFilterActive()) {
+				statusBarHeight = 20; 
+			}
+			else {
+				statusBarHeight = 0; 
+			}
 			
 			// make room when load meters are present, else use a more compact layout
 			int core_margin = m_model.getLoadMetersEnabled() ? 20 : 12;      // margin around cores in a CPU 
@@ -490,13 +536,27 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 			// Figure out area to allocate to each CPU box.
 			int ncpus  = m_cpus.size();
 			int width  = bounds.width  + cpu_separation;
-			int height = bounds.height + cpu_separation;
+			int height = bounds.height + cpu_separation - statusBarHeight;
+			
+			// put status bar at the bottom of the canvas area
+			m_statusBar.setBounds(cpu_margin, bounds.y + bounds.height - 2 * cpu_margin , width  , statusBarHeight);
+			
 			int cpu_edge = fitSquareItems(ncpus, width, height);
 			int cpu_size = cpu_edge - cpu_separation;
 			if (cpu_size < 0) cpu_size = 0;
 			
 			// Calculate area on each CPU for placing cores.
-			int ncores = m_cores.size() / ((ncpus == 0) ? 1 : ncpus);
+			int ncores = 0;
+			// find the greatest number of cores on a given CPU and use
+			// that number for size calculations for all CPUs - this way
+			// we avoid displaying cores of varying sizes, in different 
+			// CPUs.
+			for (MulticoreVisualizerCPU cpu : m_cpus) {
+				int n = cpu.getCores().size();
+				if (n > ncores) {
+					ncores = n;
+				}
+			}
 			int cpu_width  = cpu_size - core_margin * 2 + core_separation;
 			int cpu_height = cpu_size - core_margin * 2 + core_separation;
 			int core_edge  = fitSquareItems(ncores, cpu_width, cpu_height);
@@ -572,14 +632,17 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 			// like processes and threads
 			
 			for (VisualizerThread thread : m_model.getThreads()) {
-				VisualizerCore core = thread.getCore();
-				MulticoreVisualizerCore mcore = m_coreMap.get(core);
-				if (mcore != null) {
-					MulticoreVisualizerThread mthread =
-						new MulticoreVisualizerThread(mcore, thread);
-					mcore.addThread(mthread);
-					m_threads.add(mthread);
-					m_threadMap.put(thread, mthread);
+				// filter permits displaying this thread? 
+				if(m_canvasFilter.displayObject(thread)) {
+					VisualizerCore core = thread.getCore();
+					MulticoreVisualizerCore mcore = m_coreMap.get(core);
+					if (mcore != null) {
+						MulticoreVisualizerThread mthread =
+								new MulticoreVisualizerThread(mcore, thread);
+						mcore.addThread(mthread);
+						m_threads.add(mthread);
+						m_threadMap.put(thread, mthread);
+					}
 				}
 			}
 
@@ -658,6 +721,12 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
 			thread.paintContent(gc);
 		}
 		
+		// paint status bar
+		if (m_canvasFilter.isFilterActive()) {
+			m_statusBar.setMessage(m_canvasFilter.toString());
+			m_statusBar.paintContent(gc);
+		}
+		
 		// paint drag-selection marquee last, so it's on top.
 		m_marquee.paintContent(gc);
 	}
@@ -1025,4 +1094,22 @@ public class MulticoreVisualizerCanvas extends GraphicCanvas
     public void setSelectionEventsEnabled(boolean enabled) {
         m_selectionManager.setSelectionEventsEnabled(enabled);
     }
+    
+    
+    // --- canvas filter methods ---
+    
+    /** Set-up a canvas white-list filter. */
+    public void applyFilter() {
+    	m_canvasFilter.applyFilter();
+    }
+    
+    /** Removes any canvas filter currently in place */
+    public void clearFilter() {
+    	m_canvasFilter.clearFilter();
+    }
+
+    /** Tells if a canvas filter is currently in place */
+    public boolean isFilterActive() {
+    	return m_canvasFilter.isFilterActive();
+    }
 }

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/MulticoreVisualizerCanvasFilter.java

@@ -0,0 +1,300 @@
+/*******************************************************************************
+ * Copyright (c) 2013 Ericsson
+ * 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:
+ *     Marc Dumais (Ericsson) - Initial API and implementation (Bug 405390)
+ *******************************************************************************/
+
+package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.MulticoreVisualizerUIPlugin;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model.IVisualizerModelObject;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model.VisualizerCPU;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model.VisualizerCore;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model.VisualizerModel;
+import org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.model.VisualizerThread;
+import org.eclipse.cdt.visualizer.ui.util.SelectionUtils;
+import org.eclipse.jface.viewers.ISelection;
+
+
+/**
+ * White-list Filter for the graphical objects displayed in the multicore 
+ * visualizer canvas. 
+ */
+public class MulticoreVisualizerCanvasFilter {
+		
+	/** The white list */ 
+	List<IVisualizerModelObject> m_filterList = null;
+	/** the dynamically expanded list, containing elements in the */
+	/** white list and their parents - recalculated as required */
+	/** since some elements can move around and change parent */
+	List<IVisualizerModelObject> m_dynamicFilterList = null;
+	/** reference to the canvas */
+	private MulticoreVisualizerCanvas m_canvas = null;
+	
+	/** is the filter is active/set */
+	private boolean m_filterActive = false;	
+	
+	/** for stats */
+	private int m_shownCpu = 0;
+	/** for stats */
+	private int m_shownCore = 0;
+	/** for stats */
+	private int m_shownThread = 0;
+	/** for stats */
+	private int m_totalCpu = 0;
+	/** for stats */
+	private int m_totalCore = 0;
+	/** for stats */
+	private int m_totalThread = 0;
+	
+	/** String constant used in this class */
+	private static final String STR_FILTER_NOT_ACTIVE = MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.view.CanvasFilter.NotActive.text"); //$NON-NLS-1$
+	/** String constant used in this class */
+	private static final String STR_FILTER_ACTIVE = MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.view.CanvasFilter.Active.text"); //$NON-NLS-1$
+	/** String constant used in this class */
+	private static final String STR_CPU = MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.view.CanvasFilter.cpu.text"); //$NON-NLS-1$
+	/** String constant used in this class */
+	private static final String STR_CORE = MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.view.CanvasFilter.core.text"); //$NON-NLS-1$
+	/** String constant used in this class */
+	private static final String STR_THREAD = MulticoreVisualizerUIPlugin.getString("MulticoreVisualizer.view.CanvasFilter.thread.text"); //$NON-NLS-1$
+
+	// --- constructors/destructors ---
+
+	/** Constructor. */
+	public MulticoreVisualizerCanvasFilter(MulticoreVisualizerCanvas canvas) {
+		m_canvas = canvas;
+	}
+	
+	/** Dispose	method */
+	public void dispose() {
+		clearFilter();
+		m_canvas = null;
+	}
+
+	
+	// --- filter methods ---
+	
+	/**
+     * Set-up a canvas white-list filter.  Any applicable selected object is added to 
+     * the filter. 
+     */
+    public void applyFilter() {
+    	// replace current filter? Clear old one first.
+        if (isFilterActive()) {
+            clearFilter();
+        }
+
+        m_filterList = new ArrayList<IVisualizerModelObject>();
+        m_dynamicFilterList = new ArrayList<IVisualizerModelObject>();
+
+        m_filterActive = true;
+
+        // get list of selected objects the filter applies-for
+        ISelection selection = m_canvas.getSelection();
+        List<Object> selectedObjects = SelectionUtils.getSelectedObjects(selection);
+       
+        for (Object obj : selectedObjects) {
+        	if (obj instanceof IVisualizerModelObject) {
+        		m_filterList.add((IVisualizerModelObject)obj);
+        	}
+        }
+    }
+    
+	/** Removes any canvas filter currently in place */
+	public void clearFilter() {
+		if (m_filterList != null) {
+			m_filterList.clear();
+			m_filterList = null;
+		}
+		
+		if (m_dynamicFilterList != null) {
+			m_dynamicFilterList.clear();
+			m_dynamicFilterList = null;
+		}
+		resetCounters();
+		m_filterActive = false;
+		
+	}
+
+	/** tells if a canvas filter is currently in place */
+	public boolean isFilterActive() {
+		return m_filterActive;
+	}
+    
+    /**
+     * Updates the filter to contain the up-to-date parent objects,
+     * for all filter objects. 
+     */
+    public void updateFilter() {
+    	if (m_filterList == null)
+    		return;
+    	
+    	resetCounters();
+    	m_dynamicFilterList.clear();
+    	
+    	for (IVisualizerModelObject elem : m_filterList) {
+    		// element still in current model? 
+    		if (isElementInCurrentModel(elem)) {
+    			// add element to list
+    			addElementToFilterList(elem);
+
+    			// also add all its ancestors
+    			IVisualizerModelObject parent = elem.getParent();
+    			while (parent != null) {
+    				addElementToFilterList(parent);
+    				parent = parent.getParent();
+    			}
+    		}
+    	}
+    }
+
+	/**
+	 * Tells if a candidate model object should be displayed, according to the 
+	 * filter in place.  
+	 */
+	public boolean displayObject(final IVisualizerModelObject candidate) {
+		// filter not active? Let anything be displayed 
+		if (!m_filterActive) {
+			return true;
+		}
+					
+		// Candidate is in white list?  
+		if (isElementInFilterList(candidate)) {
+			return true;
+		}
+		
+		return false;
+	}
+	
+	
+	// --- filter list management ---
+	
+	/**
+	 * Adds an element to the dynamic filter list, if an equivalent 
+	 * element is not already there.
+	 */
+	private void addElementToFilterList(final IVisualizerModelObject elem) {
+		if (!isElementInFilterList(elem)) {
+			m_dynamicFilterList.add(elem);
+			stepStatsCounter(elem);
+		}
+	}
+	
+	/**
+	 * Checks if an element already has an equivalent in the 
+	 * dynamic filter list.
+	 */
+	private boolean isElementInFilterList(final IVisualizerModelObject candidate) {
+		// is the candidate in the dynamic filter list?
+		for (IVisualizerModelObject elem : m_dynamicFilterList) {
+			// Note: we are comparing the content (IDs), not references.  
+			if (candidate.compareTo(elem) == 0) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	
+	/** Used to check if model elements in the filter still exist in the current model.	 */
+	private boolean isElementInCurrentModel(IVisualizerModelObject element) {
+		VisualizerModel model = m_canvas.getModel();
+		if (model != null) {
+			if (element instanceof VisualizerThread) {
+				VisualizerThread thread = model.getThread(((VisualizerThread) element).getGDBTID());
+				if (thread != null) {
+					// Note: we are comparing the content (IDs), not references.
+					if (thread.compareTo(element) == 0) {
+						return true;
+					}
+				}
+			}
+			else if (element instanceof VisualizerCore) {
+				VisualizerCore core = model.getCore(element.getID());
+				if (core != null) {
+					// Note: we are comparing the content (IDs), not references.
+					if (core.compareTo(element) == 0) {
+						return true;
+					}
+				}
+			}
+			else if (element instanceof VisualizerCPU) {
+				VisualizerCPU cpu = model.getCPU(element.getID());
+				if (cpu != null) {
+					// Note: we are comparing the content (IDs), not references.
+					if (cpu.compareTo(element) == 0) {
+						return true;
+					}
+				}
+			}
+		}
+		return false;
+	}
+	
+	// --- Stats counters ---
+	
+    /**	
+     * Used to step the filtered counters for a given type of 
+     * model object.
+     */
+	private void stepStatsCounter(IVisualizerModelObject modelObj) {
+		if (modelObj instanceof VisualizerCPU) {
+			m_shownCpu++;
+		}
+		else if (modelObj instanceof VisualizerCore) {
+			m_shownCore++;
+		}
+		else if (modelObj instanceof VisualizerThread) {
+			m_shownThread++;
+		}
+	}
+	
+	/**	Reset the filtering counters */
+	private void resetCounters() {
+		m_shownCpu = 0;
+		m_shownCore = 0;
+		m_shownThread = 0;
+		// refresh total counts since the model can change
+		if (m_canvas != null) {
+			VisualizerModel model = m_canvas.getModel();
+			if (model != null) {
+				m_totalCpu = model.getCPUCount();
+				m_totalCore = model.getCoreCount();
+				m_totalThread = model.getThreadCount();
+			}
+		}
+	}
+	
+
+	/**	returns a String giving the current filtering stats */
+	private String getStats() {
+		
+		
+		return STR_FILTER_ACTIVE + " " + STR_CPU + " " + m_shownCpu + "/" + m_totalCpu + ", " + //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
+				STR_CORE + " " + m_shownCore + "/" + m_totalCore + ", " + //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-1$
+				STR_THREAD + " " + m_shownThread + "/" + m_totalThread;    //$NON-NLS-1$//$NON-NLS-2$
+	}
+	
+	@Override
+	public String toString() {
+		if (isFilterActive()) {
+			return getStats();
+		}
+		else {
+			return STR_FILTER_NOT_ACTIVE;
+		}
+	}
+}
+
+
+
+
+

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/MulticoreVisualizerEventListener.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2012 Ericsson and others.
+ * Copyright (c) 2012, 2013 Ericsson 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
@@ -9,6 +9,7 @@
  *     Marc Khouzam (Ericsson) - initial API and implementation
  *     Marc Dumais (Ericsson) - Bug 400231
  *     Marc Dumais (Ericsson) - Bug 399419
+ *     Marc Dumais (Ericsson) - Bug 405390
  *******************************************************************************/
 
 package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view;
@@ -122,7 +123,7 @@ public class MulticoreVisualizerEventListener {
 
 					    			thread.setState(newState);
 					    			thread.setCore(vCore);
-					    			fVisualizer.getMulticoreVisualizerCanvas().requestUpdate();
+					    			fVisualizer.refresh();
 					    		}
 							}
 						}

dsf-gdb/org.eclipse.cdt.dsf.gdb.multicorevisualizer.ui/src/org/eclipse/cdt/dsf/gdb/multicorevisualizer/internal/ui/view/MulticoreVisualizerStatusBar.java

@@ -0,0 +1,60 @@
+/*******************************************************************************
+ * Copyright (c) 2013 Ericsson
+ * 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:
+ *     Marc Dumais (Ericsson) - Initial API and implementation (Bug 405390)
+ *******************************************************************************/
+package org.eclipse.cdt.dsf.gdb.multicorevisualizer.internal.ui.view;
+
+import org.eclipse.cdt.visualizer.ui.util.GUIUtils;
+import org.eclipse.swt.graphics.GC;
+
+public class MulticoreVisualizerStatusBar extends MulticoreVisualizerGraphicObject {
+
+	// --- members ---
+	
+	/** message to display in status bar */
+	protected String m_statusMessage = null;	
+	
+	// --- constructors/destructors ---
+	
+	/** Constructor */
+	public MulticoreVisualizerStatusBar() {
+	}
+	
+
+	/** Dispose method */
+	@Override
+	public void dispose() {
+		super.dispose();
+		m_statusMessage = null;
+	}
+
+	
+	// --- accessors ---
+	
+	public void setMessage (String message) {
+		m_statusMessage = message;
+	}
+
+	// --- paint methods ---
+	
+	/** Invoked to allow element to paint itself on the viewer canvas */
+	@Override
+	public void paintContent(GC gc) {
+		
+		if (m_statusMessage == null)
+			return;
+		
+		// Display message text
+		gc.setForeground(IMulticoreVisualizerConstants.COLOR_STATUS_BAR_TEXT);
+		int tx = m_bounds.x;
+		int ty = m_bounds.y + 15;
+		GUIUtils.drawTextAligned(gc, m_statusMessage, tx, ty, true, false);
+	}
+
+}