1 files changed, 58 insertions, 0 deletions
diff --git a/lttng/org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/histogram/HistogramCanvasFocusListener.java b/lttng/org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/histogram/HistogramCanvasFocusListener.java
new file mode 100644
index 0000000000..8bf3dffe0b
--- /dev/null
+++ b/lttng/org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/histogram/HistogramCanvasFocusListener.java
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ * Copyright (c) 2009 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:
+ *   William Bourque - Initial API and implementation
+ *******************************************************************************/
+package org.eclipse.linuxtools.lttng.ui.views.histogram;
+
+import org.eclipse.swt.events.FocusEvent;
+import org.eclipse.swt.events.FocusListener;
+
+/**
+ * <b><u>HistogramCanvasFocusListener</u></b>
+ * <p>
+ * Implementation of a FocusListener for the need of the HistogramCanvas
+ * <p> 
+ */
+public class HistogramCanvasFocusListener implements FocusListener {
+	
+	protected HistogramCanvas parentCanvas = null;
+	
+	/**
+	 * HistogramCanvasFocusListener constructor
+	 * 
+	 * @param newCanvas Related canvas
+	 */
+	public HistogramCanvasFocusListener(HistogramCanvas newCanvas) {
+		parentCanvas = newCanvas;
+	}
+	
+	/**
+	 * Function that is called when the canvas get focus.<p>
+	 * 
+	 * Redraw the screen to make sure everything is sane. 
+	 * 
+	 * @param event  The focus event generated.
+	 */
+	public void focusGained(FocusEvent event) {
+		parentCanvas.redrawAsynchronously();
+	}
+	
+	/**
+	 * Function that is called when the canvas loose focus.<p>
+	 * 
+	 * Doesn't do anything yet... 
+	 * 
+	 * @param event  The focus event generated.
+	 */
+	public void focusLost(FocusEvent event) {
+		// Nothing to do yet
+	}
+
+}