236 lines
7.3 KiB
Python
236 lines
7.3 KiB
Python
# Copyright: Ankitects Pty Ltd and contributors
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# -*- coding: utf-8 -*-
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# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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from __future__ import annotations
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import time
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from typing import Optional
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import aqt.forms
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from aqt.qt import *
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from aqt.utils import TR, tr
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# Progress info
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##########################################################################
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class ProgressManager:
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def __init__(self, mw):
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self.mw = mw
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self.app = QApplication.instance()
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self.inDB = False
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self.blockUpdates = False
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self._show_timer: Optional[QTimer] = None
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self._win = None
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self._levels = 0
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# Safer timers
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##########################################################################
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# A custom timer which avoids firing while a progress dialog is active
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# (likely due to some long-running DB operation)
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def timer(self, ms, func, repeat, requiresCollection=True):
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"""Create and start a standard Anki timer.
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If the timer fires while a progress window is shown:
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- if it is a repeating timer, it will wait the same delay again
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- if it is non-repeating, it will try again in 100ms
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If requiresCollection is True, the timer will not fire if the
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collection has been unloaded. Setting it to False will allow the
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timer to fire even when there is no collection, but will still
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only fire when there is no current progress dialog."""
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def handler():
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if requiresCollection and not self.mw.col:
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# no current collection; timer is no longer valid
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print("Ignored progress func as collection unloaded: %s" % repr(func))
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return
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if not self._levels:
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# no current progress; safe to fire
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func()
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else:
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if repeat:
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# skip this time; we'll fire again
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pass
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else:
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# retry in 100ms
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self.timer(100, func, False, requiresCollection)
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t = QTimer(self.mw)
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if not repeat:
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t.setSingleShot(True)
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qconnect(t.timeout, handler)
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t.start(ms)
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return t
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# Creating progress dialogs
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##########################################################################
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def start(
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self, max=0, min=0, label=None, parent=None, immediate=False
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) -> Optional[ProgressDialog]:
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self._levels += 1
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if self._levels > 1:
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return None
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# setup window
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parent = parent or self.app.activeWindow()
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if not parent and self.mw.isVisible():
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parent = self.mw
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label = label or tr(TR.QT_MISC_PROCESSING)
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self._win = ProgressDialog(parent)
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self._win.form.progressBar.setMinimum(min)
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self._win.form.progressBar.setMaximum(max)
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self._win.form.progressBar.setTextVisible(False)
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self._win.form.label.setText(label)
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self._win.setWindowTitle("Anki")
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self._win.setWindowModality(Qt.ApplicationModal)
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self._win.setMinimumWidth(300)
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self._setBusy()
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self._shown: float = 0
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self._counter = min
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self._min = min
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self._max = max
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self._firstTime = time.time()
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self._lastUpdate = time.time()
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self._updating = False
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self._show_timer = QTimer(self.mw)
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self._show_timer.setSingleShot(True)
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self._show_timer.start(immediate and 100 or 600)
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qconnect(self._show_timer.timeout, self._on_show_timer)
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return self._win
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def update(
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self,
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label=None,
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value=None,
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process=True,
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maybeShow=True,
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max: Optional[int] = None,
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) -> None:
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# print self._min, self._counter, self._max, label, time.time() - self._lastTime
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if not self.mw.inMainThread():
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print("progress.update() called on wrong thread")
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return
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if self._updating:
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return
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if maybeShow:
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self._maybeShow()
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if not self._shown:
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return
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elapsed = time.time() - self._lastUpdate
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if label:
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self._win.form.label.setText(label)
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self._max = max or 0
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self._win.form.progressBar.setMaximum(self._max)
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if self._max:
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self._counter = value or (self._counter + 1)
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self._win.form.progressBar.setValue(self._counter)
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if process and elapsed >= 0.2:
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self._updating = True
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self.app.processEvents() # type: ignore #possibly related to https://github.com/python/mypy/issues/6910
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self._updating = False
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self._lastUpdate = time.time()
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def finish(self):
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self._levels -= 1
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self._levels = max(0, self._levels)
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if self._levels == 0:
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if self._win:
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self._closeWin()
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self._unsetBusy()
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if self._show_timer:
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self._show_timer.stop()
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self._show_timer = None
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def clear(self):
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"Restore the interface after an error."
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if self._levels:
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self._levels = 1
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self.finish()
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def _maybeShow(self):
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if not self._levels:
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return
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if self._shown:
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return
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delta = time.time() - self._firstTime
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if delta > 0.5:
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self._showWin()
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def _showWin(self) -> None:
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self._shown = time.time()
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self._win.show()
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def _closeWin(self) -> None:
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if self._shown:
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while True:
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# give the window system a second to present
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# window before we close it again - fixes
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# progress window getting stuck, especially
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# on ubuntu 16.10+
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elap = time.time() - self._shown
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if elap >= 0.5:
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break
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self.app.processEvents(QEventLoop.ExcludeUserInputEvents) # type: ignore #possibly related to https://github.com/python/mypy/issues/6910
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self._win.cancel()
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self._win = None
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self._shown = 0
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def _setBusy(self):
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self.mw.app.setOverrideCursor(QCursor(Qt.WaitCursor))
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def _unsetBusy(self):
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self.app.restoreOverrideCursor()
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def busy(self):
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"True if processing."
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return self._levels
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def _on_show_timer(self):
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self._show_timer = None
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self._showWin()
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def want_cancel(self) -> bool:
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win = self._win
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if win:
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return win.wantCancel
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else:
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return False
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def set_title(self, title: str) -> None:
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win = self._win
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if win:
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win.setWindowTitle(title)
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class ProgressDialog(QDialog):
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def __init__(self, parent):
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QDialog.__init__(self, parent)
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self.form = aqt.forms.progress.Ui_Dialog()
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self.form.setupUi(self)
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self._closingDown = False
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self.wantCancel = False
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# required for smooth progress bars
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self.form.progressBar.setStyleSheet("QProgressBar::chunk { width: 1px; }")
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def cancel(self):
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self._closingDown = True
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self.hide()
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def closeEvent(self, evt):
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if self._closingDown:
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evt.accept()
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else:
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self.wantCancel = True
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evt.ignore()
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def keyPressEvent(self, evt):
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if evt.key() == Qt.Key_Escape:
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evt.ignore()
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self.wantCancel = True
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