Mercurial Repositories > eric / file comparison
comparison: eric6/WebBrowser/Tools/DelayedFileWatcher.py
eric6/WebBrowser/Tools/DelayedFileWatcher.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7229
- 53054eb5b15a
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2016 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing a file system watcher with a delay. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import pyqtSignal, pyqtSlot, QFileSystemWatcher, QTimer | |
| 13 | |
| 14 | |
| 15 class DelayedFileWatcher(QFileSystemWatcher): | |
| 16 """ | |
| 17 Class implementing a file system watcher with a delay. | |
| 18 | |
| 19 @signal delayedDirectoryChanged(path) emitted to indicate a changed | |
| 20 directory | |
| 21 @signal delayedFileChanged(path) emitted to indicate a changed file | |
| 22 """ | |
| 23 delayedDirectoryChanged = pyqtSignal(str) | |
| 24 delayedFileChanged = pyqtSignal(str) | |
| 25 | |
| 26 def __init__(self, paths=None, parent=None): | |
| 27 """ | |
| 28 Constructor | |
| 29 | |
| 30 @param paths list of paths to be watched | |
| 31 @type list of str | |
| 32 @param parent reference to the parent object | |
| 33 @type QObject | |
| 34 """ | |
| 35 if paths: | |
| 36 super(DelayedFileWatcher, self).__init__(paths, parent) | |
| 37 else: | |
| 38 super(DelayedFileWatcher, self).__init__(parent) | |
| 39 | |
| 40 self.__dirQueue = [] | |
| 41 self.__fileQueue = [] | |
| 42 | |
| 43 self.directoryChanged.connect(self.__directoryChanged) | |
| 44 self.fileChanged.connect(self.__fileChanged) | |
| 45 | |
| 46 @pyqtSlot(str) | |
| 47 def __directoryChanged(self, path): | |
| 48 """ | |
| 49 Private slot handling a changed directory. | |
| 50 | |
| 51 @param path name of the changed directory | |
| 52 @type str | |
| 53 """ | |
| 54 self.__dirQueue.append(path) | |
| 55 QTimer.singleShot(500, self.__dequeueDirectory) | |
| 56 | |
| 57 @pyqtSlot(str) | |
| 58 def __fileChanged(self, path): | |
| 59 """ | |
| 60 Private slot handling a changed file. | |
| 61 | |
| 62 @param path name of the changed file | |
| 63 @type str | |
| 64 """ | |
| 65 self.__fileQueue.append(path) | |
| 66 QTimer.singleShot(500, self.__dequeueFile) | |
| 67 | |
| 68 @pyqtSlot() | |
| 69 def __dequeueDirectory(self): | |
| 70 """ | |
| 71 Private slot to signal a directory change. | |
| 72 """ | |
| 73 self.delayedDirectoryChanged.emit(self.__dirQueue.pop(0)) | |
| 74 | |
| 75 @pyqtSlot() | |
| 76 def __dequeueFile(self): | |
| 77 """ | |
| 78 Private slot to signal a file change. | |
| 79 """ | |
| 80 self.delayedFileChanged.emit(self.__fileQueue.pop(0)) |
