Gremlin
12 Dec 2012 19:08 - 12 Dec 2012 19:39 #27617
by ArcEye
EDIT - Partial sucess
I hacked the gremlin code thusand
This forces the use of the global emcStatus structure (or rather its python binding equivalent, linuxcnc.stat) and makes it use emcStatus->task.file from that, not some local variable passed by another mechanism.
The other error caused by shutil being unable to open sim_mm.var referenced in the .INI file (even though it was right there in the config dir)
was bypassed by hard coding linuxcnc.var as an alternative and commenting out the shutil.copy() call
Result, a fully functioning preview.
However it does not update when a new file is loaded, back to the drawing board
regards
I hacked the gremlin code thus
def realize(self, widget):
self.set_current_view()
#s = self.stat
s = linuxcnc.stat()def load(self,filename = None):
#s = self.stat
s = linuxcnc.stat()
..........
parameter = self.inifile.find("RS274NGC", "PARAMETER_FILE")
temp_parameter = os.path.join(td, os.path.basename("linuxcnc.var"))
# if parameter:
# shutil.copy(parameter, temp_parameter)
canon.parameter_file = temp_parameterThis forces the use of the global emcStatus structure (or rather its python binding equivalent, linuxcnc.stat) and makes it use emcStatus->task.file from that, not some local variable passed by another mechanism.
The other error caused by shutil being unable to open sim_mm.var referenced in the .INI file (even though it was right there in the config dir)
was bypassed by hard coding linuxcnc.var as an alternative and commenting out the shutil.copy() call
Result, a fully functioning preview.
However it does not update when a new file is loaded, back to the drawing board
regards
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12 Dec 2012 20:13 - 12 Dec 2012 21:50 #27619
by ArcEye
Hopefully now cracked it? 
The substitutionwas not really necessary, they turned out to have the same contents, so were being updated at the same time.
Commenting out use of parameterwas necessary, for this context at least and prevented failure of the call to self.load_preview(filename, canon, unitcode, initcode)
What was needed was a mechanism to force gremlin to check if the displayed file was the current one and if not update, in the absence of any input through gladeVCP.
This was achieved by creating a global oldFile and updating it every time Gremlin loaded a new file
Then the poll() sub was changed to check current filename against the one held in oldFile
Result, Gremlin now integrates with my GUI and loads a new preview when a new file is opened
NB.
For this to work however you need to implement a status loop in the GUI to compare and update the emcStatus struct.
Mine is only partially complete, so for now I directly write the new file name when ever one is opened with
strcpy(emcStatus->task.file, program);
Hopefully save someone else the same head scratching in the future
regards
The substitution
#s = self.stat
s = linuxcnc.stat()Commenting out use of parameter
parameter = self.inifile.find("RS274NGC", "PARAMETER_FILE")
temp_parameter = os.path.join(td, os.path.basename("linuxcnc.var"))
# if parameter:
# shutil.copy(parameter, temp_parameter)
canon.parameter_file = temp_parameterWhat was needed was a mechanism to force gremlin to check if the displayed file was the current one and if not update, in the absence of any input through gladeVCP.
This was achieved by creating a global oldFile and updating it every time Gremlin loaded a new file
def load(self,filename = None):
s = self.stat
#s = linuxcnc.stat()
s.poll()
if not filename and s.file:
filename = s.file
elif not filename and not s.file:
return
global oldFile
oldFile = filename
.............................Then the poll() sub was changed to check current filename against the one held in oldFile
def poll(self):
global oldFile
s = self.stat
s.poll()
fingerprint = (self.logger.npts, self.soft_limits(),
s.actual_position, s.joint_actual_position,
s.homed, s.g5x_offset, s.g92_offset, s.limit, s.tool_in_spindle,
s.motion_mode, s.current_vel)
if s.file != oldFile:
self.load()
if fingerprint != self.fingerprint:
self.fingerprint = fingerprint
self.queue_draw()
# return self.visible
return TrueResult, Gremlin now integrates with my GUI and loads a new preview when a new file is opened
NB.
For this to work however you need to implement a status loop in the GUI to compare and update the emcStatus struct.
Mine is only partially complete, so for now I directly write the new file name when ever one is opened with
strcpy(emcStatus->task.file, program);
Hopefully save someone else the same head scratching in the future
regards
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