Receiving GStat messages in GladeVCPs

    GSTAT.connect("file-loaded", self.file_loaded)

    def file_loaded(self, obj, data):
        print("FILE LOADED:", data)

        # file changed
        file_old = old.get('file', None)
        file_new = self.old['file']
        if file_new != file_old:
            # if interpreter is reading or waiting, the new file
            # is a remap procedure, with the following test we
            # partly avoid emitting a signal in that case, which would cause
            # a reload of the preview and sourceview widgets.  A signal could
            # still be emitted if aborting a program shortly after it ran an
            # external file subroutine, but that is fixed by not updating the
            # file name if call level != 0 in the merge() function above.
            # do avoid that a signal is emitted in that case, causing
            # a reload of the preview and sourceview widgets
            if self.stat.interp_state == linuxcnc.INTERP_IDLE:
                self.emit('file-loaded', file_new)

#!/usr/bin/env python3

from hal_glib import GStat
GSTAT = GStat()

class HandlerClass:

    def __init__(self, halcomp, builder, useropts):
        self.builder = builder
        GSTAT.connect("graphics-gcode-properties", self.gcode_properties)
        GSTAT.connect("file-loaded", self.file_loaded)
        GSTAT.connect("line-changed", self.line_changed)

    def gcode_properties(self, obj, data):
        print("[VCP] G-code properties:", data["name"], data["size"].replace("\n",", "))
        
    def file_loaded(self, obj, data):
        print("[VCP] File loaded:", data)
        
    def line_changed(self, obj, data):
        print("[VCP] Line changed:", data)

def get_handlers(halcomp,builder,useropts):
    return [HandlerClass(halcomp,builder,useropts)]

USER_COMMAND_FILE = custom_init.py

def gcode_properties(obj, data, widgets):
    print("[rc] G-code properties:", data["name"], data["size"].replace("\n",", "))

def file_loaded(obj, data):
    print("[rc] File loaded:", data)
    
def line_changed(obj, data, widgets):
    print("[rc] Line changed:", data)

hal_glib.GStat().connect("graphics-gcode-properties", gcode_properties, self.widgets)
hal_glib.GStat().connect("line-changed", line_changed, self.widgets)
hal_glib.GStat().connect("file-loaded", file_loaded)

[VCP] File loaded: /home/cnc/linuxcnc/nc_files/3D_Chips.ngc
[rc] G-code properties: 3D_Chips.ngc 200509 bytes, 4714 gcode lines
[rc] File loaded: /home/cnc/linuxcnc/nc_files/3D_Chips.ngc

[rc] G-code properties: 3D_Chips.ngc 200509 bytes, 4714 gcode lines
[rc] File loaded: /home/cnc/linuxcnc/nc_files/3D_Chips.ngc

[VCP] Line changed: 24
[rc] Line changed: 24
[VCP] Line changed: 25
[rc] Line changed: 25
[rc] Line changed: 26
[VCP] Line changed: 26
...