[英]Why does this code in PyQt allow me to leave all radio buttons unchecked?
我使用 PyQt 編寫了一個迷你代碼,當我注意到它允許我不選中左側的所有按鈕時,我感到很驚訝。 我不想要這種行為:應該始終選擇其中之一。 不過,窗口的右側有效。 我真的不知道為什么。 這是代碼:
from PyQt5 import QtWidgets, QtGui, QtCore
class Win(QtWidgets.QDialog):
def __init__(self, parent=None):
super(Win, self).__init__(parent)
top_layout = QtWidgets.QHBoxLayout()
top_layout_1 = QtWidgets.QHBoxLayout()
self.thresh_btns = [QtWidgets.QRadioButton('L1'),
QtWidgets.QRadioButton('L2'),
QtWidgets.QRadioButton('L3')]
self.thresh_btns[0].setChecked(True)
for btn in self.thresh_btns:
top_layout_1.addWidget(btn)
timestamp_groupbox = QtWidgets.QGroupBox('Timestamp')
top_layout_2 = QtWidgets.QVBoxLayout()
self.timestamp_current = QtWidgets.QRadioButton('Current')
self.timestamp_current.setChecked(True)
self.timestamp_target = QtWidgets.QRadioButton('Last')
top_layout_2.addWidget(self.timestamp_current)
top_layout_2.addWidget(self.timestamp_target)
timestamp_groupbox.setLayout(top_layout_2)
top_layout.addLayout(top_layout_1)
top_layout.addWidget(timestamp_groupbox)
self.setLayout(top_layout)
if __name__ == '__main__':
app = QtWidgets.QApplication([])
ex = Win()
ex.show()
app.exec_()
如果你想要這種行為,你必須使用QButtonGroup
:
from PyQt5 import QtCore, QtGui, QtWidgets
class Win(QtWidgets.QDialog):
def __init__(self, parent=None):
super(Win, self).__init__(parent)
top_layout = QtWidgets.QHBoxLayout()
top_layout_1 = QtWidgets.QHBoxLayout()
self.thresh_btns = [QtWidgets.QRadioButton('L1'),
QtWidgets.QRadioButton('L2'),
QtWidgets.QRadioButton('L3')]
group_button = QtWidgets.QButtonGroup(self) # <---
self.thresh_btns[0].setChecked(True)
for btn in self.thresh_btns:
top_layout_1.addWidget(btn)
group_button.addButton(btn) # <---
timestamp_groupbox = QtWidgets.QGroupBox('Timestamp')
top_layout_2 = QtWidgets.QVBoxLayout()
self.timestamp_current = QtWidgets.QRadioButton('Current')
self.timestamp_current.setChecked(True)
self.timestamp_target = QtWidgets.QRadioButton('Last')
top_layout_2.addWidget(self.timestamp_current)
top_layout_2.addWidget(self.timestamp_target)
timestamp_groupbox.setLayout(top_layout_2)
top_layout.addLayout(top_layout_1)
top_layout.addWidget(timestamp_groupbox)
self.setLayout(top_layout)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
ex = Win()
ex.show()
sys.exit(app.exec_())
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.