tmf: Fix NullPointerExeptions in Histogram view

[deliverable/tracecompass.git] / org.eclipse.linuxtools.tmf.ui / src / org / eclipse / linuxtools / tmf / ui / views / histogram / TimeRangeHistogram.java

diff --git a/org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/TimeRangeHistogram.java b/org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/TimeRangeHistogram.java
index e5d5b22b4ce5a5c86928bd1d97df1a4371e8aefc..04b99e932eb4b83a3aaf05d853681f15f7bce37d 100644 (file)
--- a/org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/TimeRangeHistogram.java
+++ b/org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/TimeRangeHistogram.java
@@ -114,7 +114,7 @@ public class TimeRangeHistogram extends Histogram {
 
     @Override
     public void mouseDown(MouseEvent event) {
-        if (fDragState == DRAG_NONE && fDataModel.getNbEvents() != 0) {
+        if (fScaledData != null && fDragState == DRAG_NONE && fDataModel.getNbEvents() != 0) {
             if (event.button == 2 || (event.button == 1 && (event.stateMask & SWT.MODIFIER_MASK) == SWT.CTRL)) {
                 fDragState = DRAG_RANGE;
                 fDragButton = event.button;