gmoccapy: switch file-loaded signal to GStat

The EMC_Stat signal 'file-loaded' is only emitted on a file load event.
This leads to an improper value of the pin 'program.length' if a file has been edited or reloaded.
The GStat signal 'file-loaded' is also emitted on a reload.

Author: hansu

src/emc/usr_intf/gmoccapy/gmoccapy.glade

@@ -179,7 +179,6 @@
   <object class="EMC_Action_Stop" id="hal_action_stop"/>
   <object class="EMC_Stat" id="hal_status">
     <signal name="all-homed" handler="on_hal_status_all_homed" swapped="no"/>
-    <signal name="file-loaded" handler="on_hal_status_file_loaded" swapped="no"/>
     <signal name="hard-limits-tripped" handler="on_hal_status_limits_tripped" swapped="no"/>
     <signal name="interp-idle" handler="on_hal_status_interp_idle" swapped="no"/>
     <signal name="interp-run" handler="on_hal_status_interp_run" swapped="no"/>

src/emc/usr_intf/gmoccapy/gmoccapy.py

@@ -406,6 +406,7 @@ def __init__(self, argv):
 
         GSTAT = hal_glib.GStat()
         GSTAT.connect("graphics-gcode-properties", self.on_gcode_properties)
+        GSTAT.connect("file-loaded", self.on_hal_status_file_loaded)
 
         # get if run from line should be used
         rfl = self.prefs.getpref("run_from_line", "no_run", str)
@@ -4027,6 +4028,8 @@ def on_gcode_properties(self, widget, data):
         self.widgets.lbl_gcode_x.set_text(data['x'])
         self.widgets.lbl_gcode_y.set_text(data['y'])
         self.widgets.lbl_gcode_z.set_text(data['z'])
+        # alternative way to calculate program length
+        # self.halcomp["program.length"] = int(data['size'].split("\n")[1].split(" ")[0] )
 
     def on_ntb_tool_code_info_switch_page(self, widget, page, page_num):
         self.prefs.putpref("info_tab_page", page_num, int)