Python 具有索引恢复的QListView
作为对我上一篇文章的另一个问题的延伸。在Python 具有索引恢复的QListView,python,python-3.x,pyqt,pyqt5,qlistview,Python,Python 3.x,Pyqt,Pyqt5,Qlistview,作为对我上一篇文章的另一个问题的延伸。在QListView中保存和恢复所选项目的QListView。还原后所选项目的索引无法正确打印 使用currentchange-slot方法更改索引，它将在QListView中打印所选项目的正确索引。但在重新运行软件并恢复值后，按确定按钮而不更改任何项目，当前索引应与所选项目相对应，但在这种情况下只打印0？ 它缺少什么 导入系统 从PyQt5导入QtCore、QtGui、QtWidgets 类小部件（QtWidgets.QDialog）： def uuu
QListViewQListViewcurrentchange-slotQListView确定按钮0stream您正在监视currentIndex，希望选择一个索引也会修改currentIndex，但这是不正确的。如果要还原currentIndex，则还必须保存并还原它 导入系统 从PyQt5导入QtCore、QtGui、QtWidgets 类小部件（QtWidgets.QDialog）： def uuu init uuu（self，parent=None）： 超级（小部件，自我）。\uuuuu初始化\uuuuuuu（父级） self.setFont（QtGui.QFont（“Helvetica”，8，QtGui.QFont.Normal，斜体=False）） self.setWindowTitle（“获取所选项目”） lay=qtwidts.QVBoxLayout（self） self.button=qtwidts.QPushButton（“好”） self.button.clicked.connect（self.accept） self.listView=qtwidts.QListView（） 放置内容边缘（10,10,10,10） lay.addWidget（self.listView） self.entry=QtGui.QStandardItemModel（） self.listView.setModel（self.entr
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class Widget(QtWidgets.QDialog):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.setFont(QtGui.QFont("Helvetica", 8, QtGui.QFont.Normal, italic=False))
self.setWindowTitle("Getting selected item")
lay = QtWidgets.QVBoxLayout(self)
self.button = QtWidgets.QPushButton("Okay")
self.button.clicked.connect(self.accept)
self.listView = QtWidgets.QListView()
lay.setContentsMargins(10, 10, 10, 10)
lay.addWidget(self.listView)
self.entry = QtGui.QStandardItemModel()
self.listView.setModel(self.entry)
self.listView.setSpacing(4)
self.listView.setFont(
QtGui.QFont("Helvetica", 9, QtGui.QFont.Normal, italic=False)
)
self.listView.setUniformItemSizes(True)
self.listView.setFixedSize(300, 150)
Code_Group = QtWidgets.QGroupBox()
Code_Group.setTitle("&Selecting and deselecting")
Code_Group.setLayout(lay)
Vlay = QtWidgets.QVBoxLayout(self)
Vlay.addWidget(Code_Group)
Vlay.addWidget(self.button, alignment=QtCore.Qt.AlignCenter)
Vlay.setSizeConstraint(Vlay.SetFixedSize)
self.setWindowFlag(QtCore.Qt.WindowMaximizeButtonHint, True)
self.read_settings()
self.listView.selectionModel().currentChanged.connect(self.on_row_changed)
self.accepted.connect(self.write_settings)
def on_row_changed(self, current, previous):
self._INDEX = current.row()
print('Row %d selected' % current.row())
def closeEvent(self, event):
print("closeEvent")
self.write_settings()
super(Widget, self).closeEvent(event)
def read_settings(self):
settings = QtCore.QSettings("file.ini", QtCore.QSettings.IniFormat)
settings.beginGroup("listView")
model = self.listView.model()
if settings.contains("items"):
editTriggers = settings.value(
"editTriggers", type=QtWidgets.QAbstractItemView.EditTriggers
)
selectionMode = settings.value(
"selectionMode", type=QtWidgets.QAbstractItemView.SelectionMode
)
selectionBehavior = settings.value(
"selectionBehavior", type=QtWidgets.QAbstractItemView.SelectionBehavior
)
self.listView.setEditTriggers(editTriggers)
self.listView.setSelectionMode(selectionMode)
self.listView.setSelectionBehavior(selectionBehavior)
items = settings.value("items", type=QtCore.QByteArray)
stream = QtCore.QDataStream(items, QtCore.QIODevice.ReadOnly)
while not stream.atEnd():
it = QtGui.QStandardItem()
stream >> it
model.appendRow(it)
selecteditems = settings.value("selecteditems", type=list)
for row in selecteditems:
index = model.index(row, 0)
self.listView.selectionModel().select(
index, QtCore.QItemSelectionModel.Select
)
else:
for text in [
"Itemname1",
"Itemname2",
"Itemname3",
"Itemname4",
"Itemname5",
]:
it = QtGui.QStandardItem(text)
model.appendRow(it)
self.listView.setEditTriggers(
QtWidgets.QAbstractItemView.NoEditTriggers
)
self.listView.setSelectionMode(
QtWidgets.QAbstractItemView.SingleSelection
)
self.listView.setSelectionBehavior(
QtWidgets.QAbstractItemView.SelectRows
)
settings.endGroup()
def write_settings(self):
settings = QtCore.QSettings("file.ini", QtCore.QSettings.IniFormat)
settings.beginGroup("listView")
model = self.listView.model()
settings.setValue("editTriggers", self.listView.editTriggers())
settings.setValue("selectionMode", self.listView.selectionMode())
settings.setValue("selectionBehavior", self.listView.selectionBehavior())
items = QtCore.QByteArray()
stream = QtCore.QDataStream(items, QtCore.QIODevice.WriteOnly)
for i in range(model.rowCount()):
it = model.item(i)
stream << it
settings.setValue("items", items)
selecteditems = []
for index in self.listView.selectionModel().selectedRows():
selecteditems.append(index.row())
settings.setValue("selecteditems", selecteditems)
settings.endGroup()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())