我从一个文件中填充了一个 Qlistview，文件中的每一行都变成了一行。现在，我想要另一个函数来从 qlistview 中的所有选中项目创建另一个文件。我的 ListView 如下。
def show_list(self, file_in):
QListView.__init__(self)
QListView.setWindowFlags(self, QtCore.Qt.WindowStaysOnTopHint)
QListView.setWindowTitle(self, "ListView")
self.buttonBox = QtGui.QDialogButtonBox(self)
self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
self.buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
list_view = QListView(self)
list_view.setMinimumSize(350,350)
self.verticalLayout = QtGui.QVBoxLayout(self)
self.verticalLayout.addWidget(list_view)
self.verticalLayout.addWidget(self.buttonBox)
self.buttonBox.accepted.connect(self.close)
self.buttonBox.rejected.connect(self.close)
model = QStandardItemModel(list_view)
with open(file_in) as f:
if f is not None:
item = f.readlines()
for line in item:
item = QStandardItem(line)
item.setCheckable(True)
item.setCheckState(QtCore.Qt.Unchecked)
model.appendRow(item)
list_view.setModel(model)
list_view.show()
到目前为止，这是我为获得我想要的结果所做的尝试。不幸的是，它不打印我选中的项目。当像这样调用时 self.print_checked_items(model) 我想知道可能出了什么问题？
def print_checked_items(self, model):
path = "/home/test1/checked.txt"
for index in range(model.rowCount()):
item = model.item(index)
if item.isCheckable() and item.checkState() == QtCore.Qt.Checked:
with open(path, "a") as f_out:
print ('%s\n' % item.text())
f_out.write('%s\n' % item.text()
请您参考如下方法:
当我在 Python 3.5 和 PyQt5 中运行它时，它工作正常，它打印正确的模式和勾选的项目。我删除了文件读取/写入行以进行测试。对于 PyQt4 和 Python 2.7，您应该只需要修复几个导入和打印语句。运行它，勾选几个项目，5 秒后您在控制台中看到了什么？
from PyQt5 import QtCore
from PyQt5 import QtGui
from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import QApplication, QWizardPage, QListView
class AppRemovalPage(QWizardPage):
def __init__( self, parent ):
super(AppRemovalPage, self).__init__(parent)
self.setTitle('Apps to Remove')
self.setSubTitle('Listview')
self.list_view = QListView(self)
self.list_view.setMinimumSize(465, 200)
self.isWritten = False
loo = "/home/test1/file.txt"
self.model = QtGui.QStandardItemModel(self.list_view)
for line in ('a', 'b', 'c', 'd', 'e'):
self.item = QtGui.QStandardItem(line)
self.item.setCheckable(True)
self.item.setCheckState(QtCore.Qt.Unchecked)
self.model.appendRow(self.item)
self.list_view.setModel(self.model)
self.list_view.show()
def print_checked_items(self):
for index in range(self.model.rowCount()):
item = self.model.item(index)
if item.checkState() == QtCore.Qt.Checked:
if self.isWritten:
mode = "a"
else:
mode = "w"
self.isWritten = True
print ('%s' % item.text())
print("print checked items executed")
app = QApplication([])
listview = AppRemovalPage(None)
listview.show()
QTimer.singleShot(5000, listview.print_checked_items)
app.exec_()
如果我选中 a、c 和 d，我会看到:
a w
c a
d a
print checked items executed
更新以显示 Python 文件对象如何工作(实际上是更好的代码，因为它支持使用上下文管理):
def print_checked_items(self):
path = "checked.txt"
mode = 'a' if self.isWritten else 'w'
if len(self.items) > 0:
with open(path, mode) as file:
for item in self.items:
print('%s' % item.text())
file.write(item.text() + "\n")
file.close()
print("print checked items executed")
连接可以写成wizard.button(QWizard.NextButton).clicked.connect(appremoval.print_checked_items)
