Bugfixes:

- fixed PlotCurveItem generating exceptions when data has length=0
- fixed ImageView.setImage only working once

CHANGELOG

@@ -35,6 +35,8 @@ pyqtgraph-0.9.9  [unreleased]
     - fixed ImageItem handling of rgb images
     - fixed makeARGB re-ordering of color channels
     - fixed unicode usage in AxisItem tick strings
+    - fixed PlotCurveItem generating exceptions when data has length=0
+    - fixed ImageView.setImage only working once
 
 
 pyqtgraph-0.9.8  2013-11-24

pyqtgraph/graphicsItems/PlotCurveItem.py

@@ -393,16 +393,18 @@ class PlotCurveItem(GraphicsObject):
         if self.path is None:
             x,y = self.getData()
             if x is None or len(x) == 0 or y is None or len(y) == 0:
-                return QtGui.QPainterPath()
+                self.path = QtGui.QPainterPath()
-            self.path = self.generatePath(*self.getData())
+            else:
+                self.path = self.generatePath(*self.getData())
             self.fillPath = None
             self._mouseShape = None
+            
         return self.path
 
     @debug.warnOnException  ## raising an exception here causes crash
     def paint(self, p, opt, widget):
         profiler = debug.Profiler()
-        if self.xData is None:
+        if self.xData is None or len(self.xData) == 0:
             return
         
         if HAVE_OPENGL and getConfigOption('enableExperimental') and isinstance(widget, QtOpenGL.QGLWidget):

pyqtgraph/imageview/ImageView.py

@@ -198,6 +198,7 @@ class ImageView(QtGui.QWidget):
         if not isinstance(img, np.ndarray):
             raise Exception("Image must be specified as ndarray.")
         self.image = img
+        self.imageDisp = None
         
         if xvals is not None:
             self.tVals = xvals