class QDoublePushButton(QPushButton):
"""加入了双击事件的按钮"""
doubleClicked = pyqtSignal()
clicked = pyqtSignal()
def __init__(self, *args, **kwargs):
QPushButton.__init__(self, *args, **kwargs)
self.timer = QTimer()
self.timer.setSingleShot(True)
self.timer.timeout.connect(self.clicked.emit)
super().clicked.connect(self.checkDoubleClick)
def checkDoubleClick(self):
if self.timer.isActive():
self.doubleClicked.emit()
self.timer.stop()
else:
self.timer.start(250)
class MPSM2PrintJobOutputModel(PrintJobOutputModel):
"""Print Job Output Model."""
def __init__(self, output_controller: PrinterOutputController) -> None:
"""Constructor.
Args:
output_controller: Printer's output controller.
"""
super().__init__(output_controller=output_controller, key='', name='')
self._state = 'not_started'
self._progress = 0 # type: int
self._elapsed_print_time_millis = 0 # type: int
self._elapsed_percentage_points = None # type: Optional[int]
# Estimated printing time left, in seconds.
self._remaining_print_time_secs = _MAX_REMAINING_TIME_SECS
self._stopwatch = QTimer(self)
self._stopwatch.timeout.connect(self._tick)
self._reset()
@pyqtProperty(int)
def progress(self) -> int:
"""UI label for printing progress.
Superclass computes progress based on elapsed time.
MPSM2 printers do not provide elapsed time, but progress in percentage.
Returns:
Print job progress from 0 to 100.
"""
return self._progress
@pyqtProperty(str)
def estimated_time_left(self) -> str:
"""UI label for estimated time left.
Returns:
Human-readable estimated printing time left.
"""
if self._elapsed_percentage_points is None:
return ''
if self._elapsed_percentage_points < _MIN_PERCENT_POINTS:
return ''
return TimeUtils.get_human_readable_countdown(
seconds=self._remaining_print_time_secs)
def update_progress(self, progress: int) -> None:
"""Updates job progress and calculates estimated printing time left.
Args:
progress: Job progress from 0 to 100.
"""
if progress < 0 or progress > 100:
raise ValueError(f'Invalid printing progress: {progress}.')
if progress == 0:
self._reset()
elif self._progress != progress:
if self._elapsed_percentage_points is None:
# Skip first seen percent point.
self._elapsed_percentage_points = 0
elif self._elapsed_percentage_points == 0:
self._elapsed_percentage_points += 1
if not self._stopwatch.isActive():
# New percent point seen. Start measuring.
self._stopwatch.start(_POLL_INTERVAL_MILLIS)
else:
self._remaining_print_time_secs = self._calculate_remaining_print_time(
)
self._elapsed_percentage_points += 1
self._progress = progress
def _reset(self) -> None:
"""Resets variables to calculate estimated print time left."""
self._elapsed_print_time_millis = 0
self._elapsed_percentage_points = None
self._remaining_print_time_secs = _MAX_REMAINING_TIME_SECS
if self._stopwatch.isActive():
self._stopwatch.stop()
def _calculate_remaining_print_time(self) -> int:
"""Calculates remaining print time.
Calculation is based on the printing time and progress so far.
Returns
Remaining print time in seconds.
"""
return int((100 - self._progress) * self._elapsed_print_time_millis /
self._elapsed_percentage_points / 1000)
def _tick(self) -> None:
"""Updates stopwatch."""
self._elapsed_print_time_millis += _POLL_INTERVAL_MILLIS
