Looks good, but an extra line when finished is not so pretty. The total is constant, though

src/app/qgsmeasuredialog.cpp

@@ -68,16 +68,21 @@ QgsMeasureDialog::QgsMeasureDialog( QgsMeasureTool* tool, Qt::WFlags f )
 void QgsMeasureDialog::ellipsoidalButton()
 {
   QSettings settings;
-
-  if ( mcbProjectionEnabled->isChecked() )
+  
+  // We set check state to Unchecked and button to Disabled when disabling CRS,
+  // which generates an call here. Ignore that event!
+  if ( mcbProjectionEnabled->isEnabled() )
   {
-    settings.setValue( "/qgis/measure/projectionEnabled", 2 );
+    if ( mcbProjectionEnabled->isChecked() )
+    {
+      settings.setValue( "/qgis/measure/projectionEnabled", 2 );
+    }
+    else
+    {
+      settings.setValue( "/qgis/measure/projectionEnabled", 0 );
+    }
+    updateSettings();
   }
-  else
-  {
-    settings.setValue( "/qgis/measure/projectionEnabled", 0 );
-  }
-  updateSettings();
 }
 
 void QgsMeasureDialog::updateSettings()
@@ -139,8 +144,10 @@ void QgsMeasureDialog::mousePress( QgsPoint &point )
     show();
   }
   raise();
-
-  mouseMove( point );
+  if ( ! mTool->done() )
+  {
+    mouseMove( point );
+  }
 }
 
 void QgsMeasureDialog::mouseMove( QgsPoint &point )
@@ -263,6 +270,7 @@ void QgsMeasureDialog::updateUi()
   // If project wide transformation is off, disbale checkbox and unmark it.
   // When on, enable checbox and mark with saved value.
   mcbProjectionEnabled->setEnabled( mTool->canvas()->hasCrsTransformEnabled() );
+  mcbProjectionEnabled->setCheckState( mTool->canvas()->hasCrsTransformEnabled() && mEllipsoidal ? Qt::Checked : Qt::Unchecked );
 
   // Set tooltip to indicate how we calculate measurments
   QString toolTip = tr( "The calculations are based on:" );
@@ -325,7 +333,7 @@ void QgsMeasureDialog::updateUi()
         convertMeasurement( d, myDisplayUnits, false );
 
         QTreeWidgetItem *item = mTable->topLevelItem( mTable->topLevelItemCount() - 1 );
-        item->setText( 0, QLocale::system().toString( d, 'f' ) );
+        item->setText( 0, QLocale::system().toString( d, 'f', mDecimalPlaces ) );
         item = new QTreeWidgetItem( QStringList( QLocale::system().toString( 0.0, 'f', mDecimalPlaces ) ) );
         item->setTextAlignment( 0, Qt::AlignRight );
         mTable->addTopLevelItem( item );

src/app/qgsmeasuretool.cpp

@@ -40,7 +40,7 @@ QgsMeasureTool::QgsMeasureTool( QgsMapCanvas* canvas, bool measureArea )
   QPixmap myCrossHairQPixmap = QPixmap(( const char ** ) cross_hair_cursor );
   mCursor = QCursor( myCrossHairQPixmap, 8, 8 );
 
-  mRightMouseClicked = false;
+  mDone = false;
 
   mDialog = new QgsMeasureDialog( this );
   mSnapper.setMapCanvas( canvas );
@@ -101,7 +101,7 @@ void QgsMeasureTool::restart()
   // re-read settings
   updateSettings();
 
-  mRightMouseClicked = false;
+  mDone = false;
   mWrongProjectProjection = false;
 
 }
@@ -127,7 +127,7 @@ void QgsMeasureTool::canvasPressEvent( QMouseEvent * e )
 {
   if ( e->button() == Qt::LeftButton )
   {
-    if ( mRightMouseClicked )
+    if ( mDone )
       mDialog->restart();
 
     QgsPoint idPoint = snapPoint( e->pos() );
@@ -137,7 +137,7 @@ void QgsMeasureTool::canvasPressEvent( QMouseEvent * e )
 
 void QgsMeasureTool::canvasMoveEvent( QMouseEvent * e )
 {
-  if ( !mRightMouseClicked )
+  if ( ! mDone )
   {
     QgsPoint point = snapPoint( e->pos() );
 
@@ -153,10 +153,17 @@ void QgsMeasureTool::canvasReleaseEvent( QMouseEvent * e )
 
   if ( e->button() == Qt::RightButton && ( e->buttons() & Qt::LeftButton ) == 0 ) // restart
   {
-    if ( mRightMouseClicked )
+    if ( mDone )
+    {
       mDialog->restart();
+    }
     else
-      mRightMouseClicked = true;
+    {
+      // The figure is finished, store last point.
+      mDone = true;
+      addPoint( point );
+      mDialog->show();
+    }
   }
   else if ( e->button() == Qt::LeftButton )
   {
@@ -180,7 +187,10 @@ void QgsMeasureTool::addPoint( QgsPoint &point )
 
 
   mRubberBand->addPoint( point );
-  mDialog->addPoint( point );
+  if ( ! mDone )
+  {
+    mDialog->addPoint( point );
+  }
 }
 
 QgsPoint QgsMeasureTool::snapPoint( const QPoint& p )

src/app/qgsmeasuretool.h

@@ -40,6 +40,10 @@ class QgsMeasureTool : public QgsMapTool
     //! returns whether measuring distance or area
     bool measureArea() { return mMeasureArea; }
 
+    //! When we hvae added our last point, and not following 
+    // Added in 2.0
+    bool done() { return mDone; }
+
     //! Reset and start new
     void restart();
 
@@ -83,7 +87,7 @@ class QgsMeasureTool : public QgsMapTool
     bool mMeasureArea;
 
     //! indicates whether we've just done a right mouse click
-    bool mRightMouseClicked;
+    bool mDone;
 
     //! indicates whether we've recently warned the user about having the wrong
     // project projection