Fixed various initialization issues found by valgrind.

core/eventhandlers/trackballnavigationeventlistener.cpp

@@ -66,6 +66,7 @@ namespace campvis {
         , _viewportSizeProp(viewportSizeProp)
         , _cpnw(cameraProperty)
         , _trackball(0)
+        , _sceneBounds(tgt::vec3(0.f))
     {
         tgtAssert(_cameraProperty != 0, "Assigned camera property must not be 0.");
         tgtAssert(_viewportSizeProp != 0, "Assigned viewport size property must not be 0.");

ext/sigslot/sigslot.cpp

@@ -74,7 +74,7 @@ namespace sigslot {
 
         while (! _stopExecution) {
             // try pop the next event from the event queue
-            _signal_handle_base* signal;
+            _signal_handle_base* signal = nullptr;
             if (_signalQueue.try_pop(signal)) {
                 signal->processSignal();
                 delete signal;

ext/sigslot/sigslot.h

@@ -250,8 +250,16 @@ namespace sigslot {
     /// Base class for signal handles that provides an interface to emit the signal.
     class SIGSLOT_API _signal_handle_base {
     public:
+        // default constructor
+        _signal_handle_base()
+#ifdef CAMPVIS_DEBUG
+            : _callingLine(0)
+#endif
+        {};
+
         /// Virtual destructor
         virtual ~_signal_handle_base() {};
+
         /// Emits the signal of this signal handle.
         virtual void processSignal() const = 0;
 
@@ -270,7 +278,6 @@ namespace sigslot {
 
 #ifdef CAMPVIS_DEBUG
         // This is debug information only, automatically removed from release builds
-
         std::string _callingFunction;   ///< Function that emitted this signal
         std::string _callingFile;       ///< File which emitted this signal
         int _callingLine;               ///< Line where this signal was emitted

modules/vis/processors/volumeexplorer.cpp

@@ -53,6 +53,8 @@ namespace campvis {
         , p_enableScribbling("EnableScribbling", "Enable Scribbling in Slice Views", false)
         , p_seProperties("SliceExtractorProperties", "Slice Extractor Properties")
         , p_vrProperties("VolumeRendererProperties", "Volume Renderer Properties")
+        , _shader(nullptr)
+        , _quad(nullptr)
         , _raycaster(viewportSizeProp, raycaster)
         , _sliceRenderer(sliceRenderer)
         , p_smallRenderSize("SmallRenderSize", "Small Render Size", tgt::ivec2(32), tgt::ivec2(0), tgt::ivec2(10000), tgt::ivec2(1))
@@ -61,8 +63,11 @@ namespace campvis {
         , _ySliceHandler(&_sliceRenderer->p_ySliceNumber)
         , _zSliceHandler(&_sliceRenderer->p_zSliceNumber)
         , _windowingHandler(nullptr)
-        , _trackballEH(0)
+        , _trackballEH(nullptr)
         , _mousePressedInRaycaster(false)
+        , _viewUnderEvent(VOLUME)
+        , _eventPositionOffset(0)
+        , _eventViewportSize(0)
         , _scribblePointer(nullptr)
         , _cachedImageSize(0)
     {

test/core/tools/concurrenthistogramtest.cpp

@@ -67,10 +67,10 @@ protected:
     }
 
     ~ConcurrentHistogramNDUniform() {
-        delete max;
-        delete min;
-        delete numBuckets;
-        delete histogram;
+        delete [] max;
+        delete [] min;
+        delete [] numBuckets;
+        delete [] histogram;
     }
 
     virtual void SetUp() {
@@ -202,10 +202,10 @@ protected:
     }
 
     ~ConcurrentHistogramNDSpecific() {
-        delete max;
-        delete min;
-        delete numBuckets;
-        delete histogram;
+        delete [] max;
+        delete [] min;
+        delete [] numBuckets;
+        delete [] histogram;
     }
 
     virtual void SetUp() {

test/main.cpp

@@ -145,8 +145,11 @@ GTEST_API_ int main(int argc, char **argv) {
     XInitThreads();
 #endif
 
-
     app = new QApplication(argc, argv);
+
+    // Make Xlib and GLX thread safe under X11
+    QApplication::setAttribute(Qt::AA_X11InitThreads);
+
     testing::InitGoogleTest(&argc, argv);
     int ret;