Question

我有一个包含QGroupBox的QDialog，其中包含一些QPushButton。我想要区分QPushButton的背光颜色和所有剩余的QPushButton。如何使用pyqgis实现这一目标？

Answer 1

确保按钮都是组框的子项，然后使用findChildren迭代它们。您还可以使用QButtonGroup来帮助管理按钮。

这是一个演示脚本，展示如何完成：

from PyQt4 import QtCore, QtGui

class Dialog(QtGui.QDialog):
    def __init__(self):
        QtGui.QDialog.__init__(self)
        layout = QtGui.QVBoxLayout(self)
        self.groupBox = QtGui.QGroupBox(self)
        layout.addWidget(self.groupBox)
        layout = QtGui.QVBoxLayout(self.groupBox)
        for index in range(5):
            button = QtGui.QPushButton('Button %d' % index, self.groupBox)
            layout.addWidget(button)
        self.buttonGroup = QtGui.QButtonGroup(self)
        self.buttonGroup.buttonClicked.connect(self.handleButtonClicked)
        self.updateButtonGroup()

    def updateButtonGroup(self):
        for button in self.groupBox.findChildren(QtGui.QPushButton):
            if self.buttonGroup.id(button) < 0:
                self.buttonGroup.addButton(button)

    def handleButtonClicked(self, button):
        for item in self.buttonGroup.buttons():
            if button is item:
                item.setStyleSheet('background-color: orange')
            else:
                item.setStyleSheet('')

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Dialog()
    window.show()
    sys.exit(app.exec_())

Answer 2

如果使用类QtGui.QGroupBox的原因是选择按钮就像单选按钮一样，您可以使用Qt样式表设置不同的背景颜色;

import sys
from PyQt4 import QtGui

class QCustomDialog (QtGui.QDialog):
    def __init__(self, *args, **kwargs):
        QtGui.QDialog.__init__(self, *args, **kwargs)
        myQVBoxLayout = QtGui.QVBoxLayout()
        for text in ['PyQt', 'Stack', 'Overflow']:
            myQPushButton = QtGui.QPushButton(text)
            myQPushButton.setCheckable(True)
            myQPushButton.setAutoExclusive(True)
            myQVBoxLayout.addWidget(myQPushButton)
        myQVBoxLayout.addStretch(1)
        myQGroupBox = QtGui.QGroupBox()
        myQGroupBox.setStyleSheet('''
            QPushButton {
                border: 0px;
                color: rgb(255, 255, 255);
                background-color: rgb(0, 0, 0);
            }
            QPushButton:checked {
                border: 0px;
                color: rgb(255, 255, 255);
                background-color: rgb(255, 0, 0);
            }
        ''')
        myQGroupBox.setLayout(myQVBoxLayout)
        allQVBoxLayout = QtGui.QVBoxLayout()
        allQVBoxLayout.addWidget(myQGroupBox)
        self.setLayout(allQVBoxLayout)

myQApplication = QtGui.QApplication([])
myQCustomDialog = QCustomDialog()
myQCustomDialog.show()
sys.exit(myQApplication.exec_())

如何迭代QPushButton

2 个答案: