qtvcp -toolbar library: add step function

Author: c-morley

lib/python/qtvcp/lib/toolbar_actions.py

@@ -107,6 +107,13 @@ def update_selected(line):
             STATUS.connect('interp-paused', lambda w: widget.setEnabled(homed_on_test()))
             STATUS.connect('file-loaded', lambda w, f: widget.setEnabled(homed_on_test()))
             function = (self.actOnRun)
+        elif action == 'step':
+            STATUS.connect('state-off', lambda w: widget.setEnabled(False))
+            STATUS.connect('state-estop', lambda w: widget.setEnabled(False))
+            STATUS.connect('interp-idle', lambda w: widget.setEnabled(homed_on_test()))
+            STATUS.connect('all-homed', lambda w: widget.setEnabled(True))
+            STATUS.connect('not-all-homed', lambda w, data: widget.setEnabled(False))
+            function = (self.actOnStep)
         elif action == 'pause':
             STATUS.connect('state-off', lambda w: widget.setEnabled(False))
             STATUS.connect('state-estop', lambda w: widget.setEnabled(False))
@@ -320,6 +327,10 @@ def actOnProperties(self,widget, state=None):
 
     def actOnRun(self,widget, state=None):
         ACTION.RUN()
+
+    def actOnStep(self, widget, state=None):
+        ACTION.STEP()
+
     def actOnPause(self,widget, state=None):
         ACTION.PAUSE()