fixes on secop gui

- do not display a dialog when a command returns None
- apply fmtstr, if available

Change-Id: I74da3e86e4eae9000608581e0a0f6e8c72cef715

secop/gui/modulectrl.py

@@ -165,6 +165,7 @@ class ModuleCtrl(QWidget):
             result = None
             qualifiers = {}
             # XXX: flag missing data report as error
+        if result is not None:
             showCommandResultDialog(command, args, result, qualifiers)
 
     def _initModuleWidgets(self):

secop/gui/params/__init__.py

@@ -76,7 +76,13 @@ class GenericParameterWidget(ParameterWidget):
                                self.setLineEdit.text())
 
     def updateValue(self, value):
-        self.currentLineEdit.setText(str(value))
+        fmtstr = getattr(self._datatype, 'fmtstr', '%s')
+        if value.readerror:
+            value = str(value)
+        else:
+            value = fmtstr % (value.value,)
+        self.currentLineEdit.setText(value)
+        # self.currentLineEdit.setText(str(value))
 
 
 class EnumParameterWidget(GenericParameterWidget):