Fixed Parameter.sigValueChanging

CHANGELOG

@@ -77,6 +77,7 @@ pyqtgraph-0.9.9  [unreleased]
     - MeshData can generate edges from face-indexed vertexes
     - Fixed multiprocess deadlocks on windows
     - Fixed GLGridItem.setSize
+    - Fixed parametertree.Parameter.sigValueChanging
 
 pyqtgraph-0.9.8  2013-11-24
 

examples/parametertree.py

@@ -123,6 +123,17 @@ def change(param, changes):
 p.sigTreeStateChanged.connect(change)
 
 
+def valueChanging(param, value):
+    print "Value changing (not finalized):", param, value
+    
+# Too lazy for recursion:
+for child in p.children():
+    child.sigValueChanging.connect(valueChanging)
+    for ch2 in child.children():
+        ch2.sigValueChanging.connect(valueChanging)
+        
+
+
 def save():
     global state
     state = p.saveState()

pyqtgraph/parametertree/parameterTypes.py

@@ -208,12 +208,14 @@ class WidgetParameterItem(ParameterItem):
         val = self.widget.value()
         newVal = self.param.setValue(val)
 
-    def widgetValueChanging(self):
+    def widgetValueChanging(self, *args):
         """
         Called when the widget's value is changing, but not finalized.
         For example: editing text before pressing enter or changing focus.
         """
-        pass
+        # This is a bit sketchy: assume the last argument of each signal is
+        # the value..
+        self.param.sigValueChanging.emit(self.param, args[-1])
         
     def selected(self, sel):
         """Called when this item has been selected (sel=True) OR deselected (sel=False)"""