Merge pull request #287 from ales-erjavec/qt5-fix

Qt5 compatifility fixes

pyqtgraph/Qt.py

@@ -148,7 +148,7 @@ elif QT_LIB == PYQT5:
     
     # We're using PyQt5 which has a different structure so we're going to use a shim to
     # recreate the Qt4 structure for Qt5
-    from PyQt5 import QtGui, QtCore, QtWidgets, Qt, uic
+    from PyQt5 import QtGui, QtCore, QtWidgets, uic
     try:
         from PyQt5 import QtSvg
     except ImportError:
@@ -159,10 +159,18 @@ elif QT_LIB == PYQT5:
         pass
 
     # Re-implement deprecated APIs
-    def scale(self, sx, sy):
+
+    __QGraphicsItem_scale = QtWidgets.QGraphicsItem.scale
+
+    def scale(self, *args):
+        if args:
+            sx, sy = args
             tr = self.transform()
             tr.scale(sx, sy)
             self.setTransform(tr)
+        else:
+            return __QGraphicsItem_scale(self)
+
     QtWidgets.QGraphicsItem.scale = scale
 
     def rotate(self, angle):
@@ -181,8 +189,8 @@ elif QT_LIB == PYQT5:
         self.setContentsMargins(i, i, i, i)
     QtWidgets.QGridLayout.setMargin = setMargin
 
-    def setResizeMode(self, mode):
-        self.setSectionResizeMode(mode)
+    def setResizeMode(self, *args):
+        self.setSectionResizeMode(*args)
     QtWidgets.QHeaderView.setResizeMode = setResizeMode