Merge pull request #1336 from ales-erjavec/fixes/arrow-item-parent-arg

Fix an error in ArrowItem constructor when passed a parent=... argument

pyqtgraph/graphicsItems/ArrowItem.py

@@ -11,13 +11,13 @@ class ArrowItem(QtGui.QGraphicsPathItem):
     """
     
     
-    def __init__(self, **opts):
+    def __init__(self, parent=None, **opts):
         """
         Arrows can be initialized with any keyword arguments accepted by 
         the setStyle() method.
         """
         self.opts = {}
-        QtGui.QGraphicsPathItem.__init__(self, opts.get('parent', None))
+        QtGui.QGraphicsPathItem.__init__(self, parent)
 
         if 'size' in opts:
             opts['headLen'] = opts['size']

pyqtgraph/graphicsItems/tests/test_ArrowItem.py

@@ -0,0 +1,10 @@
+import pyqtgraph as pg
+
+app = pg.mkQApp()
+
+
+def test_ArrowItem_parent():
+    parent = pg.GraphicsObject()
+    a = pg.ArrowItem(parent=parent, pos=(10, 10))
+    assert a.parentItem() is parent
+    assert a.pos() == pg.Point(10, 10)