def send_status(self):
""" Sends the current status of the printer to the connected Flectra instance.
"""
self.data = {
'value': '',
'state': self.state,
}
event_manager.device_changed(self)
def _take_measure(self):
"""Reads the device's weight value, and pushes that value to the frontend."""
with self._device_lock:
self._read_weight()
if self.data['value'] != self.last_sent_value or self._status[
'status'] == self.STATUS_ERROR:
self.last_sent_value = self.data['value']
event_manager.device_changed(self)
def take_control(self, new_owner, html=None):
# ALLOW A CASHIER TO TAKE CONTROL OVER THE POSBOX, IN CASE OF MULTIPLE CASHIER PER DISPLAY
self.owner = new_owner
self.rendered_html = html
self.data = {
'value': '',
'owner': self.owner,
}
event_manager.device_changed(self)
self.event_data.set()
def _keyboard_input(self, scancode):
"""Deal with a keyboard input. Send the character corresponding to the
pressed key represented by its scancode to the connected Flectra instance.
Args:
scancode (int): The scancode of the pressed key.
"""
self.data['value'] = self._scancode_to_char(scancode)
if self.data['value']:
event_manager.device_changed(self)
def _take_measure(self):
"""Reads the device's weight value, and pushes that value to the frontend."""
if self._is_reading:
with self._device_lock:
self._read_weight()
self._check_last_weight_time()
if self.data['value'] != self.last_sent_value or self._status[
'status'] == self.STATUS_ERROR:
self.last_sent_value = self.data['value']
event_manager.device_changed(self)
else:
time.sleep(0.5)
def action(self, data):
if data.get('action', False) == 'update_layout':
layout = {
'layout': data.get('layout'),
'variant': data.get('variant'),
}
self._change_keyboard_layout(layout)
self.save_layout(layout)
elif data.get('action', False) == 'update_is_scanner':
is_scanner = {'is_scanner': data.get('is_scanner')}
self.save_is_scanner(is_scanner)
else:
self.data['value'] = ''
event_manager.device_changed(self)
def action(self, data):
if data.get('action') == "update_url" and self.device_identifier != 'distant_display':
self.update_url(data.get('url'))
elif data.get('action') == "display_refresh" and self.device_identifier != 'distant_display':
self.call_xdotools('F5')
elif data.get('action') == "take_control":
self.take_control(self.data['owner'], data.get('html'))
elif data.get('action') == "customer_facing_display":
self.update_customer_facing_display(self.data['owner'], data.get('html'))
elif data.get('action') == "get_owner":
self.data = {
'value': '',
'owner': self.owner,
}
event_manager.device_changed(self)
def _barcode_scanner_input(self, scancode):
"""Deal with a barcode scanner input. Add the new character scanned to
the current barcode or complete the barcode if "Return" is pressed.
When a barcode is completed, two tasks are performed:
- Send a device_changed update to the event manager to notify the
listeners that the value has changed (used in Enterprise).
- Add the barcode to the list barcodes that are being queried in
Community.
Args:
scancode (int): The scancode of the pressed key.
"""
if scancode == 28: # Return
self.data['value'] = self._current_barcode
event_manager.device_changed(self)
self._barcodes.put((time.time(), self._current_barcode))
self._current_barcode = ''
else:
self._current_barcode += self._scancode_to_char(scancode)
def _read_once_action(self, data):
"""Reads the scale current weight value and pushes it to the frontend."""
self._read_weight()
self.last_sent_value = self.data['value']
event_manager.device_changed(self)
def _push_status(self):
"""Updates the current status and pushes it to the frontend."""
self.data['status'] = self._status
event_manager.device_changed(self)