[英]QFileDialog.getOpenFileName change button text from 'Open' to 'Remove'
我正在使用QFileDialog.getOpenFileName(self,'Remove File', "path", '*.pdf')
到 select 一個文件並獲取路徑以便將其從我的應用程序中刪除。 問題是 QFileDialog.getOpenFileName window 按鈕在選擇文件時顯示“打開”,這會讓用戶感到困惑。
有什么方法可以將按鈕文本從“打開”更改為“刪除”/“刪除”
當使用靜態方法QFileDialog::getOpenFileName()
,第一件事是獲取QFileDialog
對象,為此我們使用QTimer
和findChild()
方法:
# ...
QtCore.QTimer.singleShot(0, self.on_timeout)
filename, _ = QtWidgets.QFileDialog.getOpenFileName(...,
options=QtWidgets.QFileDialog.DontUseNativeDialog)
def on_timeout(self):
dialog = self.findChild(QtWidgets.QFileDialog)
# ...
然后你可以讓文本在按鈕上迭代,直到你得到帶有搜索文本的按鈕並更改它:
for btn in dialog.findChildren(QtWidgets.QPushButton):
if btn.text() == "&Open":
btn.setText("Remove")
這將在開始時起作用,但每次與它們顯示的QTreeView
交互時,將文本更新為默認值,因此必須使用來自QTreeView
的selectionModel()
的currentChanged
信號應用相同的邏輯,但出於同步原因有必要稍后使用另一個QTimer.singleShot()
更新文本,以下代碼是一個可行的示例:
import sys
from PyQt5 import QtCore, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
button = QtWidgets.QPushButton("Press me")
button.clicked.connect(self.on_clicked)
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(button)
@QtCore.pyqtSlot()
def on_clicked(self):
QtCore.QTimer.singleShot(0, self.on_timeout)
filename, _ = QtWidgets.QFileDialog.getOpenFileName(
self,
"Remove File",
"path",
"*.pdf",
options=QtWidgets.QFileDialog.DontUseNativeDialog,
)
def on_timeout(self):
dialog = self.findChild(QtWidgets.QFileDialog)
dialog.findChild(QtWidgets.QTreeView).selectionModel().currentChanged.connect(
lambda: self.change_button_name(dialog)
)
self.change_button_name(dialog)
def change_button_name(self, dialog):
for btn in dialog.findChildren(QtWidgets.QPushButton):
if btn.text() == self.tr("&Open"):
QtCore.QTimer.singleShot(0, lambda btn=btn: btn.setText("Remove"))
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
如果不使用靜態方法並使用QFileDialog
的實例創建對話框,則可以避免第一步:
import sys
from PyQt5 import QtCore, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
button = QtWidgets.QPushButton("Press me")
button.clicked.connect(self.on_clicked)
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(button)
@QtCore.pyqtSlot()
def on_clicked(self):
dialog = QtWidgets.QFileDialog(
self,
"Remove File",
"path",
"*.pdf",
supportedSchemes=["file"],
options=QtWidgets.QFileDialog.DontUseNativeDialog,
)
self.change_button_name(dialog)
dialog.findChild(QtWidgets.QTreeView).selectionModel().currentChanged.connect(
lambda: self.change_button_name(dialog)
)
if dialog.exec_() == QtWidgets.QDialog.Accepted:
filename = dialog.selectedUrls()[0]
print(filename)
def change_button_name(self, dialog):
for btn in dialog.findChildren(QtWidgets.QPushButton):
if btn.text() == self.tr("&Open"):
QtCore.QTimer.singleShot(0, lambda btn=btn: btn.setText("Remove"))
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
雖然我很欣賞@eyllanesc 提供的解決方案,但我想提出一個變體。
在某些情況下,該答案的代碼可能會失敗,特別是:
考慮到上述情況,我根據以上幾點提出了一個替代解決方案。
出於明顯的原因,要點仍然存在:對話框必須是非本地的。
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class FileDialogTest(QWidget):
def __init__(self):
super().__init__()
layout = QHBoxLayout(self)
self.fileEdit = QLineEdit()
layout.addWidget(self.fileEdit)
self.selectBtn = QToolButton(icon=QIcon.fromTheme('folder'), text='…')
layout.addWidget(self.selectBtn)
self.selectBtn.clicked.connect(self.showSelectDialog)
def checkSelectDialog(self):
dialog = self.findChild(QFileDialog)
if not dialog.isVisible():
# wait for dialog finalization, as testOption might fail
return
# dialog found, stop the timer and delete it
self.sender().stop()
self.sender().deleteLater()
if not dialog.testOption(dialog.DontUseNativeDialog):
# native dialog, we cannot do anything!
return
def updateOpenButton():
selection = tree.selectionModel().selectedIndexes()
if selection and not tree.model().isDir(selection[0]):
# it's a file, change the button text
button.setText('Select my precious file')
tree = dialog.findChild(QTreeView)
button = dialog.findChild(QDialogButtonBox).button(
QDialogButtonBox.Open)
# check for selected files on open
updateOpenButton()
# connect the selection update signal
tree.selectionModel().selectionChanged.connect(
lambda: QTimer.singleShot(0, updateOpenButton))
def showSelectDialog(self):
QTimer(self, interval=10, timeout=self.checkSelectDialog).start()
path, filter = QFileDialog.getOpenFileName(self,
'Select file', '<path_to_file>',
"All Files (*);;Python Files (*.py);; PNG Files (*.png)",
options=QFileDialog.DontUseNativeDialog)
if path:
self.fileEdit.setText(path)
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
ex = FileDialogTest()
ex.show()
sys.exit(app.exec())
顯然,對於 PyQt6,您需要使用正確的 Enum 名稱空間(即QFileDialog.Option.DontUseNativeDialog
等)。
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