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dupeguru/qtlib/recent.py
2014-02-01 17:17:15 -05:00

96 lines
2.8 KiB
Python

# Created By: Virgil Dupras
# Created On: 2009-11-12
# Copyright 2014 Hardcoded Software (http://www.hardcoded.net)
#
# This software is licensed under the "BSD" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.hardcoded.net/licenses/bsd_license
from collections import namedtuple
from PyQt5.QtCore import pyqtSignal, QObject
from PyQt5.QtWidgets import QAction
from hscommon.trans import trget
from hscommon.util import dedupe
tr = trget('qtlib')
MenuEntry = namedtuple('MenuEntry', 'menu fixedItemCount')
class Recent(QObject):
def __init__(self, app, prefName, maxItemCount=10, **kwargs):
super().__init__(**kwargs)
self._app = app
self._menuEntries = []
self._prefName = prefName
self._maxItemCount = maxItemCount
self._items = []
self._loadFromPrefs()
self._app.willSavePrefs.connect(self._saveToPrefs)
#--- Private
def _loadFromPrefs(self):
items = getattr(self._app.prefs, self._prefName)
if not isinstance(items, list):
items = []
self._items = items
def _insertItem(self, item):
self._items = dedupe([item] + self._items)[:self._maxItemCount]
def _refreshMenu(self, menuEntry):
menu, fixedItemCount = menuEntry
for action in menu.actions()[fixedItemCount:]:
menu.removeAction(action)
for item in self._items:
action = QAction(item, menu)
action.setData(item)
action.triggered.connect(self.menuItemWasClicked)
menu.addAction(action)
menu.addSeparator()
action = QAction(tr("Clear List"), menu)
action.triggered.connect(self.clear)
menu.addAction(action)
def _refreshAllMenus(self):
for menuEntry in self._menuEntries:
self._refreshMenu(menuEntry)
def _saveToPrefs(self):
setattr(self._app.prefs, self._prefName, self._items)
#--- Public
def addMenu(self, menu):
menuEntry = MenuEntry(menu, len(menu.actions()))
self._menuEntries.append(menuEntry)
self._refreshMenu(menuEntry)
def clear(self):
self._items = []
self._refreshAllMenus()
self.itemsChanged.emit()
def insertItem(self, item):
self._insertItem(str(item))
self._refreshAllMenus()
self.itemsChanged.emit()
def isEmpty(self):
return not bool(self._items)
#--- Event Handlers
def menuItemWasClicked(self):
action = self.sender()
if action is not None:
item = action.data()
self.mustOpenItem.emit(item)
self._refreshAllMenus()
#--- Signals
mustOpenItem = pyqtSignal(str)
itemsChanged = pyqtSignal()