Minor updates:

GraphicsObject - corrected bug in viewPos() method
  WidgetGroup - allow bound methods in interfaces
  parametertree - fixed crash when calling remove from context menu

WidgetGroup.py

@@ -255,7 +255,14 @@ class WidgetGroup(QtCore.QObject):
         if getFunc is None:
             return None
             
+        ## if the getter function provided in the interface is a bound method,
+        ## then just call the method directly. Otherwise, pass in the widget as the first arg
+        ## to the function.
+        if inspect.ismethod(getFunc) and getFunc.im_self is not None:  
+            val = getFunc()
+        else:
             val = getFunc(w)
+            
         if self.scales[w] is not None:
             val /= self.scales[w]
         #if isinstance(val, QtCore.QString):
@@ -273,7 +280,15 @@ class WidgetGroup(QtCore.QObject):
             setFunc = WidgetGroup.classes[type(w)][2]
         else:
             setFunc = w.widgetGroupInterface()[2]
+            
+        ## if the setter function provided in the interface is a bound method,
+        ## then just call the method directly. Otherwise, pass in the widget as the first arg
+        ## to the function.
+        if inspect.ismethod(setFunc) and setFunc.im_self is not None:  
+            setFunc(v)
+        else:
             setFunc(w, v)
+            
         #name = self.widgetList[w]
         #if name in self.cache and (self.cache[name] != v1):
             #print "%s: Cached value %s != set value %s" % (name, str(self.cache[name]), str(v1))

graphicsItems/GraphicsItemMethods.py

@@ -229,7 +229,7 @@ class GraphicsItemMethods(object):
         return Point(QtGui.QGraphicsObject.pos(self))
     
     def viewPos(self):
-        return self.mapToView(self.pos())
+        return self.mapToView(self.mapFromParent(self.pos()))
     
     #def itemChange(self, change, value):
         #ret = QtGui.QGraphicsObject.itemChange(self, change, value)

parametertree/Parameter.py

@@ -284,6 +284,10 @@ class Parameter(QtCore.QObject):
         for ch in self.childs[:]:
             self.removeChild(ch)
 
+    def children(self):  
+        ## warning -- this overrides QObject.children
+        return self.childs[:]
+
     def parentChanged(self, parent):
         self._parent = parent
         self.sigParentChanged.emit(self, parent)

parametertree/ParameterItem.py

@@ -38,7 +38,7 @@ class ParameterItem(QtGui.QTreeWidgetItem):
             flags |= QtCore.Qt.ItemIsEditable
             self.contextMenu.addAction('Rename').triggered.connect(self.editName)
         if opts.get('removable', False):
-            self.contextMenu.addAction("Remove").triggered.connect(self.param.remove)
+            self.contextMenu.addAction("Remove").triggered.connect(self.requestRemove)
         
         ## handle movable / dropEnabled options
         if opts.get('movable', False):
@@ -144,5 +144,9 @@ class ParameterItem(QtGui.QTreeWidgetItem):
         """Called when this item has been selected (sel=True) OR deselected (sel=False)"""
         pass
 
-
+    def requestRemove(self):
+        ## called when remove is selected from the context menu.
+        ## we need to delay removal until the action is complete
+        ## since destroying the menu in mid-action will cause a crash.
+        QtCore.QTimer.singleShot(0, self.param.remove)