每当关闭选项卡时，我都试图从QTabWidget类更新在QTabBar类中创建的字典变量。
尽管它似乎正在删除我在QTabWidget类中想要的键，但实际的字典变量似乎在QTabBar类中没有得到更新。
因此，当我尝试在主文件window.py文件中调用该变量时，仍然可以在该变量中找到初始值。
在下面的示例中，如果我从0中删除索引键self.custom_dict，则只希望看到索引键1，但是在我的主文件中，我仍会得到结果两个索引。
我的问题是-变量可以从一个类更新为另一个类吗？还是应该采用全局变量？
window.py
class MyApp(object):
def __init__(self):
...
...
self._setupUI()
def _setupUI(self):
...
...
self._tab_widget = TabWidget()
my_btn = QtGui.QPushButton('Get info')
my_btn.clicked.connect(self.get_dict_info)
def get_dict_info(self):
custom = self._tab_widget.tab_bar.custom_dict
# If I run this function, it is returning me both indexes in
# which I am only expecting key `1` only
'''
{
0: {
'listA' : ['itemA_01', 'itemA_02'],
'listB' : ['itemB_01']
},
1: {
'listC' : ['itemC_01', 'itemC_02']
},
}
'''
tabs.py
class TabWidget(QtGui.QTabWidget):
def __init__(self, parent=None):
super(TabWidget, self).__init__(parent)
...
...
self.setupUI()
def setupUI(self):
...
...
self.tab_bar = TabBar()
self.tab_bar.tabDeleteRequested.connect(self._removeTab)
@QtCore.Slot(int)
def _removeTabFromPrompt(self, index):
self.removeTab(index)
custom_dict = self.tabBar().custom_dict
del custom_dict[index]
# custom_dict does and will only return me the following:
'''
{
1: {
'listC' : ['itemC_01', 'itemC_02']
},
}
'''
class TabBar(QtGui.QTabBar):
tabDeleteRequested = QtCore.Signal(int)
def __init__(self, parent=None):
super(TabBar, self).__init__(parent)
...
...
self.custom_dict = defaultdict(dict)
'''
Example of self.custom_dict:
{
0: {
'listA' : ['itemA_01', 'itemA_02'],
'listB' : ['itemB_01']
},
1: {
'listC' : ['itemC_01', 'itemC_02']
},
}
'''
def mousePressEvent(self, event):
self.index = self.tabAt(event.pos())
if event.button() == QtCore.Qt.RightButton:
self._showContextMenu(event.pos(), self.index)
else:
super(TabBar, self).mousePressEvent(event)
def _showContextMenu(self, position, index):
"""Add the right-click menu to the given tab.
Args:
position (QtCore.QPoint): Position offset based on tab
widget coordinates.
index (int): The tab index.
"""
role = self.tabData(index)
self.qmenu = QtGui.QMenu(self)
self.qmenu.setTitle(self.tabText(index))
if utils.has_edit_permissions(role):
remove_icon = QtGui.QIcon(utils.get_icon_path('remove'))
remove_tab_action = QtGui.QAction(remove_icon, 'Remove Tab', self)
slot = functools.partial(self.tabDeleteRequested.emit, index)
remove_tab_action.triggered.connect(slot)
self.qmenu.addAction(remove_tab_action)
else:
message = ('You do not have permission')
disabled_action = QtGui.QAction(message, self)
disabled_action.setEnabled(False)
self.qmenu.addAction(disabled_action)
global_position = self.mapToGlobal(self.pos())
self.qmenu.exec_(QtCore.QPoint(
global_position.x() - self.pos().x() + position.x(),
global_position.y() - self.pos().y() + position.y()
))