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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008 - 2014 by Wilbert Berendsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
QProgressBar subclasses.
"""
from PyQt5.QtCore import QTimeLine, QTimer
from PyQt5.QtWidgets import QProgressBar
class TimedProgressBar(QProgressBar):
"""A QProgressBar showing a certain time elapse."""
def __init__(
self,
parent=None,
hideWhileIdle=True,
hidden=False,
showFinished=3000
):
super(TimedProgressBar, self).__init__(parent, minimum=0, maximum=100)
self._hideWhileIdle = hideWhileIdle
self._hidden = hidden
self._showFinished = showFinished
self._timeline = QTimeLine(
updateInterval=100, frameChanged=self.setValue
)
self._timeline.setFrameRange(0, 100)
self._hideTimer = QTimer(
timeout=self._done,
singleShot=True,
interval=showFinished
)
if not hidden and not hideWhileIdle:
self.show()
def setHidden(self, state):
self._hidden = state
self._done()
def setHideWhileIdle(self, state):
self._hideWhileIdle = state
self._done()
def setShowFinished(self, state):
self._showFinished = state
def start(self, total, elapsed=0.0):
"""Starts showing progress.
total is the number of seconds (maybe float) the timeline will last,
elapsed (defaulting to 0) is the value to start with.
"""
self._hideTimer.stop()
self._timeline.stop()
self._timeline.setDuration(int(total * 1000))
self._timeline.setCurrentTime(int(elapsed * 1000))
self.setValue(self._timeline.currentFrame())
self._timeline.resume()
if self._hideWhileIdle and not self._hidden:
self.show()
def stop(self):
"""Ends the progress display.
If showFinished is True (the default), 100% is shown for a few
seconds and then the progress is reset.
The progressbar is hidden if the hideOnTimeout attribute is True.
"""
self._hideTimer.stop()
self._timeline.stop()
if self._showFinished and self._hideWhileIdle and not self._hidden:
self.setValue(100)
self._hideTimer.start()
else:
self._done()
def _done(self):
if self._hideWhileIdle and not self._hidden:
self.hide()
self.reset()
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