light9: light8/uihelpers.py comparison

partway through the fancy trace-disabling feature

comparison

equal deleted inserted replaced

-:d1a1ded20ec7
+:139d6ed2fbaa
 class FancyDoubleVar(DoubleVar):
 def __init__(self,master=None):
 DoubleVar.__init__(self,master)
 self.callbacklist = {}
 def trace_variable(self,mode,callback):
+"""Define a trace callback for the variable.
+MODE is one of "r", "w", "u" for read, write, undefine.
+CALLBACK must be a function which is called when
+the variable is read, written or undefined.
+Return the name of the callback.
+"""
+cbname = self._master._register(callback)
+self._tk.call("trace", "variable", self._name, mode, cbname)
 # we build a list of the trace callbacks (the py functrions and the tcl functionnames)
-id=DoubleVar.trace_variable(self,mode,callback)
+self.callbacklist[cbname]= mode
+print "added trace:",callback,cbname
-self.callbacklist[id]= [mode,callback]
+return cbname
-return id
+trace=trace_variable
 def disable_traces(self):
-for k,v in self.callbacklist.items():
+for cb,mode in self.callbacklist.items():
-self.trace_vdelete(v[0],k)
+#            DoubleVar.trace_vdelete(self,v[0],k)
+self._tk.call("trace", "vdelete", self._name, mode,cb)
+# but no master delete!
 def recreate_traces(self):
-for k,v in self.callbacklist.items():
+for cb,mode in self.callbacklist.items():
-self.trace_variable(v[0],v[1])
+#            self.trace_variable(v[0],v[1])
+self._tk.call("trace", "variable", self._name, mode,cb)
 if __name__=='__main__':
 root=Tk()
 root.tk_focusFollowsMouse()
 iv=IntVar()

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