Add a QgsDebugCall macro to trace entering/leaving functions

Replace manual debugging lines used for the same purpose in a couple
of implementation files for node tool.

src/app/nodetool/qgsmaptoolnodetool.cpp

@@ -345,7 +345,7 @@ void QgsMapToolNodeTool::canvasMoveEvent( QMouseEvent * e )
 
 void QgsMapToolNodeTool::canvasPressEvent( QMouseEvent * e )
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
 
   QgsVectorLayer *vlayer = qobject_cast<QgsVectorLayer *>( mCanvas->currentLayer() );
 
@@ -473,12 +473,11 @@ void QgsMapToolNodeTool::canvasPressEvent( QMouseEvent * e )
       }
     }
   }
-  QgsDebugMsg( "Leaving." );
 }
 
 void QgsMapToolNodeTool::selectedFeatureDestroyed()
 {
-  QgsDebugMsg( "Entered." );
+  QgsDebugCall;
   mSelectedFeature = 0;
 }
 

src/app/nodetool/qgsselectedfeature.cpp

@@ -35,13 +35,13 @@ QgsSelectedFeature::QgsSelectedFeature( QgsFeatureId featureId,
     , mRubberBand( 0 )
     , mValidator( 0 )
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
   setSelectedFeature( featureId, vlayer, canvas );
 }
 
 QgsSelectedFeature::~QgsSelectedFeature()
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
 
   deleteVertexMap();
 
@@ -61,14 +61,14 @@ QgsSelectedFeature::~QgsSelectedFeature()
 
 void QgsSelectedFeature::currentLayerChanged( QgsMapLayer *layer )
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
   if ( layer == mVlayer )
     deleteLater();
 }
 
 void QgsSelectedFeature::updateGeometry( QgsGeometry *geom )
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
 
   delete mGeometry;
 
@@ -149,7 +149,7 @@ void QgsSelectedFeature::featureDeleted( QgsFeatureId fid )
 
 void QgsSelectedFeature::geometryChanged( QgsFeatureId fid, QgsGeometry &geom )
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
 
   if ( !mVlayer || fid != mFeatureId )
     return;
@@ -483,7 +483,7 @@ void QgsSelectedFeature::createVertexMapPoint()
 
 void QgsSelectedFeature::createVertexMap()
 {
-  QgsDebugMsg( "Entering." );
+  QgsDebugCall;
 
   if ( !mGeometry )
   {

src/core/qgslogger.h

@@ -30,7 +30,9 @@ class QFile;
     if ( QgsLogger::debugLevel() >= (level) && (level) > 0 ) \
       QgsLogger::debug(QString(str), (level), __FILE__, __FUNCTION__, __LINE__); \
   }
+#define QgsDebugCall QgsScopeLogger _qgsScopeLogger(__FILE__, __FUNCTION__, __LINE__)
 #else
+#define QgsDebugCall 
 #define QgsDebugMsg(str)
 #define QgsDebugMsgLevel(str, level)
 #endif
@@ -130,4 +132,20 @@ class CORE_EXPORT QgsLogger
     static int sPrefixLength;
 };
 
+class QgsScopeLogger {
+public:
+  QgsScopeLogger(const char* file, const char* func, int line)
+    : _file(file), _func(func), _line(line)
+  {
+    QgsLogger::debug("Entering.", 1, _file, _func, _line);
+  }
+  ~QgsScopeLogger() {
+    QgsLogger::debug("Leaving.", 1, _file, _func, _line);
+  }
+private:
+  const char *_file;
+  const char *_func;
+  int _line;
+};
+
 #endif