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# Pause/Resume functionality with position capture/restore
#
# Copyright (C) 2019 Eric Callahan <arksine.code@gmail.com>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
class PauseResume:
def __init__(self, config):
self.printer = config.get_printer()
self.gcode = self.printer.lookup_object("gcode")
self.recover_velocity = config.getfloat("recover_velocity", 50.0)
self.v_sd = None
self.is_paused = False
self.sd_paused = False
self.pause_command_sent = False
self.printer.register_event_handler("klippy:connect", self.handle_connect)
self.gcode.register_command("PAUSE", self.cmd_PAUSE, desc=self.cmd_PAUSE_help)
self.gcode.register_command(
"RESUME", self.cmd_RESUME, desc=self.cmd_RESUME_help
)
self.gcode.register_command(
"CLEAR_PAUSE", self.cmd_CLEAR_PAUSE, desc=self.cmd_CLEAR_PAUSE_help
)
self.gcode.register_command(
"CANCEL_PRINT", self.cmd_CANCEL_PRINT, desc=self.cmd_CANCEL_PRINT_help
)
webhooks = self.printer.lookup_object("webhooks")
webhooks.register_endpoint("pause_resume/cancel", self._handle_cancel_request)
webhooks.register_endpoint("pause_resume/pause", self._handle_pause_request)
webhooks.register_endpoint("pause_resume/resume", self._handle_resume_request)
def handle_connect(self):
self.v_sd = self.printer.lookup_object("virtual_sdcard", None)
def _handle_cancel_request(self, web_request):
self.gcode.run_script("CANCEL_PRINT")
def _handle_pause_request(self, web_request):
self.gcode.run_script("PAUSE")
def _handle_resume_request(self, web_request):
self.gcode.run_script("RESUME")
def get_status(self, eventtime):
return {"is_paused": self.is_paused}
def is_sd_active(self):
return self.v_sd is not None and self.v_sd.is_active()
def send_pause_command(self):
# This sends the appropriate pause command from an event. Note
# the difference between pause_command_sent and is_paused, the
# module isn't officially paused until the PAUSE gcode executes.
if not self.pause_command_sent:
if self.is_sd_active():
# Printing from virtual sd, run pause command
self.sd_paused = True
self.v_sd.do_pause()
else:
self.sd_paused = False
self.gcode.respond_info("action:paused")
self.pause_command_sent = True
cmd_PAUSE_help = "Pauses the current print"
def cmd_PAUSE(self, gcmd):
if self.is_paused:
gcmd.respond_info("Print already paused")
return
self.send_pause_command()
self.gcode.run_script_from_command("SAVE_GCODE_STATE NAME=PAUSE_STATE")
self.is_paused = True
def send_resume_command(self):
if self.sd_paused:
# Printing from virtual sd, run pause command
self.v_sd.do_resume()
self.sd_paused = False
else:
self.gcode.respond_info("action:resumed")
self.pause_command_sent = False
cmd_RESUME_help = "Resumes the print from a pause"
def cmd_RESUME(self, gcmd):
if not self.is_paused:
gcmd.respond_info("Print is not paused, resume aborted")
return
velocity = gcmd.get_float("VELOCITY", self.recover_velocity)
self.gcode.run_script_from_command(
"RESTORE_GCODE_STATE NAME=PAUSE_STATE MOVE=1 MOVE_SPEED=%.4f" % (velocity)
)
self.send_resume_command()
self.is_paused = False
cmd_CLEAR_PAUSE_help = "Clears the current paused state without resuming the print"
def cmd_CLEAR_PAUSE(self, gcmd):
self.is_paused = self.pause_command_sent = False
cmd_CANCEL_PRINT_help = "Cancel the current print"
def cmd_CANCEL_PRINT(self, gcmd):
if self.is_sd_active() or self.sd_paused:
self.v_sd.do_cancel()
else:
gcmd.respond_info("action:cancel")
self.cmd_CLEAR_PAUSE(gcmd)
def load_config(config):
return PauseResume(config)
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