Mercurial Repositories > eric / file comparison
comparison: src/eric7/Utilities/AutoSaver.py
src/eric7/Utilities/AutoSaver.py
- branch
- eric7
- changeset 9209
- b99e7fd55fd3
- parent 8881
- 54e42bc2437a
- child 9221
- bf71ee032bb4
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| 9208:3fc8dfeb6ebe | 9209:b99e7fd55fd3 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2009 - 2022 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing an auto saver class. | |
| 8 """ | |
| 9 | |
| 10 from PyQt6.QtCore import QObject, QBasicTimer, QTime | |
| 11 | |
| 12 | |
| 13 class AutoSaver(QObject): | |
| 14 """ | |
| 15 Class implementing the auto saver. | |
| 16 """ | |
| 17 AUTOSAVE_IN = 1000 * 3 | |
| 18 MAXWAIT = 1000 * 15 | |
| 19 | |
| 20 def __init__(self, parent, save): | |
| 21 """ | |
| 22 Constructor | |
| 23 | |
| 24 @param parent reference to the parent object (QObject) | |
| 25 @param save slot to be called to perform the save operation | |
| 26 @exception RuntimeError raised, if no parent is given | |
| 27 """ | |
| 28 super().__init__(parent) | |
| 29 | |
| 30 if parent is None: | |
| 31 raise RuntimeError("AutoSaver: parent must not be None.") | |
| 32 | |
| 33 self.__save = save | |
| 34 | |
| 35 self.__timer = QBasicTimer() | |
| 36 self.__firstChange = None | |
| 37 | |
| 38 def changeOccurred(self): | |
| 39 """ | |
| 40 Public slot handling a change. | |
| 41 """ | |
| 42 if self.__firstChange is None: | |
| 43 self.__firstChange = QTime.currentTime() | |
| 44 | |
| 45 if self.__firstChange.msecsTo(QTime.currentTime()) > self.MAXWAIT: | |
| 46 self.saveIfNeccessary() | |
| 47 else: | |
| 48 self.__timer.start(self.AUTOSAVE_IN, self) | |
| 49 | |
| 50 def timerEvent(self, evt): | |
| 51 """ | |
| 52 Protected method handling timer events. | |
| 53 | |
| 54 @param evt reference to the timer event (QTimerEvent) | |
| 55 """ | |
| 56 if evt.timerId() == self.__timer.timerId(): | |
| 57 self.saveIfNeccessary() | |
| 58 else: | |
| 59 super().timerEvent(evt) | |
| 60 | |
| 61 def saveIfNeccessary(self): | |
| 62 """ | |
| 63 Public method to activate the save operation. | |
| 64 """ | |
| 65 if not self.__timer.isActive(): | |
| 66 return | |
| 67 | |
| 68 self.__timer.stop() | |
| 69 self.__firstChange = None | |
| 70 self.__save() |
