我正在使用PyQt5和Py3.7,我试图循环我所有的Qlistwidget并保存它们的字符串数据,但也保存该小部件上所有选定的项。我稍微修改了here中的循环,但是在使用listwidget数组循环保存和恢复所选项目时遇到了一些问题。我检查了文档,但似乎无法理解如何从SetArrayIndex、here的Qt文档中向数组中添加额外的选项(例如保存所有选定的项)。
我的listWidgets将selectionMode设置为MultiSelection。我目前正在使用以下命令来节省成本:
def save_list_data(self):
self.settings = QSettings("data.ini", QSettings.IniFormat)
for name, obj in inspect.getmembers(self):
if isinstance(obj, QListWidget):
name = obj.objectName()
self.settings.beginWriteArray(name)
for i in range(obj.count()):
self.settings.setArrayIndex(i)
self.settings.setValue(name, obj.item(i).text())
self.settings.endArray()
然后使用以下命令恢复listWidget数据:
def open_list_data(self):
self.settings = QSettings("data.ini", QSettings.IniFormat)
for name, obj in inspect.getmembers(self):
if isinstance(obj, QListWidget):
name = obj.objectName()
size = self.settings.beginReadArray(name)
for i in range(size):
self.settings.setArrayIndex(i)
value = self.settings.value(name)
if value != None:
obj.addItem(value)
self.settings.endArray()
这对数据很有效,但是如何从ListWidgets中获得保存和恢复的selectedItems呢?
发布于 2019-05-27 06:56:07
对于我的解决方案,请考虑以下几点:
使用inspect模块的
考虑到上述情况,解决方案是:
from PyQt5 import QtCore, QtGui, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.listwidget_1 = QtWidgets.QListWidget(
objectName="listwidget_1",
selectionMode=QtWidgets.QAbstractItemView.MultiSelection
)
listwidget_2 = QtWidgets.QListWidget(
objectName="listwidget_2",
selectionMode=QtWidgets.QAbstractItemView.MultiSelection
)
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(self.listwidget_1)
lay.addWidget(listwidget_2)
self.read_settings()
def closeEvent(self, event):
self.write_settings()
super().closeEvent(event)
def read_settings(self):
settings = QtCore.QSettings("data.ini", QtCore.QSettings.IniFormat)
childrens = self.findChildren(QtWidgets.QWidget)
for children in childrens:
if isinstance(children, QtWidgets.QListWidget) and children.objectName():
settings.beginGroup(children.objectName())
items = settings.value("items")
selecteditems = settings.value("selecteditems")
selectionMode = settings.value("selectionMode", type=QtWidgets.QAbstractItemView.SelectionMode)
children.setSelectionMode(selectionMode)
# In the first reading the initial values must be established
if items is None:
if children.objectName() == "listwidget_1":
for i in range(10):
children.addItem(QtWidgets.QListWidgetItem(str(i)))
elif children.objectName() == "listwidget_2":
for i in "abcdefghijklmnopqrstuvwxyz":
children.addItem(QtWidgets.QListWidgetItem(i))
else:
stream = QtCore.QDataStream(items, QtCore.QIODevice.ReadOnly)
while not stream.atEnd():
it = QtWidgets.QListWidgetItem()
stream >> it
children.addItem(it)
stream = QtCore.QDataStream(selecteditems, QtCore.QIODevice.ReadOnly)
while not stream.atEnd():
row = stream.readInt()
it = children.item(row)
it.setSelected(True)
settings.endGroup()
def write_settings(self):
settings = QtCore.QSettings("data.ini", QtCore.QSettings.IniFormat)
childrens = self.findChildren(QtWidgets.QWidget)
for children in childrens:
if isinstance(children, QtWidgets.QListWidget) and children.objectName():
settings.beginGroup(children.objectName())
items = QtCore.QByteArray()
stream = QtCore.QDataStream(items, QtCore.QIODevice.WriteOnly)
for i in range(children.count()):
stream << children.item(i)
selecteditems = QtCore.QByteArray()
stream = QtCore.QDataStream(selecteditems, QtCore.QIODevice.WriteOnly)
for it in children.selectedItems():
stream.writeInt(children.row(it))
settings.setValue("items", items)
settings.setValue("selecteditems", selecteditems)
settings.setValue("selectionMode", children.selectionMode())
settings.endGroup()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
+:
import contextlib
from PyQt5 import QtCore, QtGui, QtWidgets
class SettingsManager:
def __init__(self, filename):
self.m_settings = QtCore.QSettings(filename, QtCore.QSettings.IniFormat)
@property
def settings(self):
return self.m_settings
def read(self, widget):
self.settings.beginGroup(widget.objectName())
if isinstance(widget, QtWidgets.QAbstractItemView):
selectionMode = self.settings.value(
"selectionMode", type=QtWidgets.QAbstractItemView.SelectionMode
)
widget.setSelectionMode(selectionMode)
if isinstance(widget, QtWidgets.QListWidget):
items = self.settings.value("items")
selecteditems = self.settings.value("selecteditems")
# In the first reading the initial values must be established
if items is None:
self.read_defaults(widget)
else:
stream = QtCore.QDataStream(items, QtCore.QIODevice.ReadOnly)
while not stream.atEnd():
it = QtWidgets.QListWidgetItem()
stream >> it
widget.addItem(it)
stream = QtCore.QDataStream(
selecteditems, QtCore.QIODevice.ReadOnly
)
while not stream.atEnd():
row = stream.readInt()
it = widget.item(row)
if it is not None:
it.setSelected(True)
if isinstance(widget, QtWidgets.QTableWidget):
rowCount = self.settings.value("rowCount", type=int)
columnCount = self.settings.value("columnCount", type=int)
widget.setRowCount(rowCount)
widget.setColumnCount(columnCount)
items = self.settings.value("items")
if items is None:
self.read_defaults(widget)
else:
stream = QtCore.QDataStream(items, QtCore.QIODevice.ReadOnly)
while not stream.atEnd():
it = QtWidgets.QTableWidgetItem()
i = stream.readInt()
j = stream.readInt()
stream >> it
widget.setItem(i, j, it)
selecteditems = self.settings.value("selecteditems")
stream = QtCore.QDataStream(
selecteditems, QtCore.QIODevice.ReadOnly
)
while not stream.atEnd():
i = stream.readInt()
j = stream.readInt()
it = widget.item(i, j)
if it is not None:
it.setSelected(True)
self.settings.endGroup()
def write(self, widget):
self.settings.beginGroup(widget.objectName())
if isinstance(widget, QtWidgets.QAbstractItemView):
self.settings.setValue("selectionMode", widget.selectionMode())
if isinstance(widget, QtWidgets.QListWidget):
items = QtCore.QByteArray()
stream = QtCore.QDataStream(items, QtCore.QIODevice.WriteOnly)
for i in range(widget.count()):
stream << widget.item(i)
self.settings.setValue("items", items)
selecteditems = QtCore.QByteArray()
stream = QtCore.QDataStream(
selecteditems, QtCore.QIODevice.WriteOnly
)
for it in widget.selectedItems():
stream.writeInt(widget.row(it))
self.settings.setValue("selecteditems", selecteditems)
if isinstance(widget, QtWidgets.QTableWidget):
self.settings.setValue("rowCount", widget.rowCount())
self.settings.setValue("columnCount", widget.columnCount())
items = QtCore.QByteArray()
stream = QtCore.QDataStream(items, QtCore.QIODevice.WriteOnly)
for i in range(widget.rowCount()):
for j in range(widget.columnCount()):
it = widget.item(i, j)
if it is not None:
stream.writeInt(i)
stream.writeInt(j)
stream << it
self.settings.setValue("items", items)
selecteditems = QtCore.QByteArray()
stream = QtCore.QDataStream(
selecteditems, QtCore.QIODevice.WriteOnly
)
for it in widget.selectedItems():
# print(it.row(), it.column())
stream.writeInt(it.row())
stream.writeInt(it.column())
self.settings.setValue("selecteditems", selecteditems)
self.settings.endGroup()
def release(self):
self.m_settings.sync()
def read_defaults(self, widget):
if widget.objectName() == "listwidget_1":
widget.setSelectionMode(QtWidgets.QAbstractItemView.MultiSelection)
for i in range(10):
widget.addItem(QtWidgets.QListWidgetItem(str(i)))
elif widget.objectName() == "listwidget_2":
widget.setSelectionMode(QtWidgets.QAbstractItemView.MultiSelection)
for i in "abcdefghijklmnopqrstuvwxyz":
widget.addItem(QtWidgets.QListWidgetItem(i))
elif widget.objectName() == "tablewidget":
widget.setSelectionMode(QtWidgets.QAbstractItemView.MultiSelection)
widget.setRowCount(10)
widget.setColumnCount(10)
for i in range(widget.rowCount()):
for j in range(widget.columnCount()):
it = QtWidgets.QTableWidgetItem("{}-{}".format(i, j))
widget.setItem(i, j, it)
@contextlib.contextmanager
def settingsContext(filename):
manager = SettingsManager(filename)
try:
yield manager
finally:
manager.release()
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.listwidget_1 = QtWidgets.QListWidget(objectName="listwidget_1")
listwidget_2 = QtWidgets.QListWidget(objectName="listwidget_2")
tablewidget = QtWidgets.QTableWidget(objectName="tablewidget")
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(self.listwidget_1)
lay.addWidget(listwidget_2)
lay.addWidget(tablewidget)
self.read_settings()
def closeEvent(self, event):
self.write_settings()
super().closeEvent(event)
def read_settings(self):
with settingsContext("data.ini") as m:
for children in self.findChildren(QtWidgets.QWidget):
if children.objectName():
m.read(children)
def write_settings(self):
with settingsContext("data.ini") as m:
for children in self.findChildren(QtWidgets.QWidget):
if children.objectName():
m.write(children)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.resize(640, 480)
w.show()
sys.exit(app.exec_())
https://stackoverflow.com/questions/56292450
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