本文借用HTML的css语法，将样式表应用到窗口部件。这里只是个简单的例子，实际上样式表的语法很丰富。
以下类似于css：
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StyleSheet = """QComboBox { color: darkblue; }QLineEdit { color: darkgreen; }QLineEdit[mandatory="true"] { #mandatory="true"时，QLineEdit的样式会变化 background-color: rgb(255, 255, 127); color: darkblue;} |
如果在选择器的前面加上一个句点，比如.QLineEdit，则选择器就会只应用于指定的类，而不会应用于这个类的子类。如果要求选择器仅用于某一特定窗口部件，则可以对该窗口部件调用setObjectName(),然后用该名字作为选择器的一部分。比如，如果有一个按钮，其对象名字是“findButton”，则应用于这个按钮的选择器就应该是QpushButton#findButton。有些窗口部件会有一些子控件。例如QComboBox会有一个箭头子控件，用户通过点击这个箭头来看到下拉列表。子控件可以指定为选择器的一部分–例如，QComboBox::drop-down。伪状态可以用一个冒号指定–例如，QCheckBox::checked.
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#!/usr/bin/env python3import sysfrom PyQt5.QtWidgets import (QApplication, QComboBox, QDialog, QDialogButtonBox, QGridLayout, QLabel, QLineEdit, QVBoxLayout)class ContactDlg(QDialog): StyleSheet = """QComboBox { color: darkblue; }QLineEdit { color: darkgreen; }QLineEdit[mandatory="true"] { background-color: rgb(255, 255, 127); color: darkblue;}""" def __init__(self, parent=None): super(ContactDlg, self).__init__(parent) forenameLabel = QLabel("&Forename:") self.forenameEdit = QLineEdit() forenameLabel.setBuddy(self.forenameEdit) surnameLabel = QLabel("&Surname:") self.surnameEdit = QLineEdit() surnameLabel.setBuddy(self.surnameEdit) categoryLabel = QLabel("&Category:") self.categoryComboBox = QComboBox() categoryLabel.setBuddy(self.categoryComboBox) self.categoryComboBox.addItems(["Business", "Domestic", "Personal"]) companyLabel = QLabel("C&ompany:") self.companyEdit = QLineEdit() companyLabel.setBuddy(self.companyEdit) addressLabel = QLabel("A&ddress:") self.addressEdit = QLineEdit() addressLabel.setBuddy(self.addressEdit) phoneLabel = QLabel("&Phone:") self.phoneEdit = QLineEdit() phoneLabel.setBuddy(self.phoneEdit) mobileLabel = QLabel("&Mobile:") self.mobileEdit = QLineEdit() mobileLabel.setBuddy(self.mobileEdit) faxLabel = QLabel("Fa&x:") self.faxEdit = QLineEdit() faxLabel.setBuddy(self.faxEdit) emailLabel = QLabel("&Email:") self.emailEdit = QLineEdit() emailLabel.setBuddy(self.emailEdit) self.buttonBox = QDialogButtonBox(QDialogButtonBox.Ok| QDialogButtonBox.Cancel) addButton = self.buttonBox.button(QDialogButtonBox.Ok) addButton.setText("&Add") addButton.setEnabled(False) grid = QGridLayout() grid.addWidget(forenameLabel, 0, 0) grid.addWidget(self.forenameEdit, 0, 1) grid.addWidget(surnameLabel, 0, 2) grid.addWidget(self.surnameEdit, 0, 3) grid.addWidget(categoryLabel, 1, 0) grid.addWidget(self.categoryComboBox, 1, 1) grid.addWidget(companyLabel, 1, 2) grid.addWidget(self.companyEdit, 1, 3) grid.addWidget(addressLabel, 2, 0) grid.addWidget(self.addressEdit, 2, 1, 1, 3) grid.addWidget(phoneLabel, 3, 0) grid.addWidget(self.phoneEdit, 3, 1) grid.addWidget(mobileLabel, 3, 2) grid.addWidget(self.mobileEdit, 3, 3) grid.addWidget(faxLabel, 4, 0) grid.addWidget(self.faxEdit, 4, 1) grid.addWidget(emailLabel, 4, 2) grid.addWidget(self.emailEdit, 4, 3) layout = QVBoxLayout() layout.addLayout(grid) layout.addWidget(self.buttonBox) self.setLayout(layout) self.lineedits = (self.forenameEdit, self.surnameEdit, self.companyEdit, self.phoneEdit, self.emailEdit) for lineEdit in self.lineedits: lineEdit.setProperty("mandatory", True) lineEdit.textEdited.connect(self.updateUi) self.categoryComboBox.activated.connect(self.updateUi) self.buttonBox.accepted.connect(self.accept) self.buttonBox.rejected.connect(self.reject) self.setStyleSheet(ContactDlg.StyleSheet) self.setWindowTitle("Add Contact") def updateUi(self): mandatory = bool(self.companyEdit.property("mandatory")) if self.categoryComboBox.currentText() == "Business": if not mandatory: self.companyEdit.setProperty("mandatory", True) elif mandatory: self.companyEdit.setProperty("mandatory", False) if (mandatory != bool(self.companyEdit.property("mandatory"))): self.setStyleSheet(ContactDlg.StyleSheet) enable = True for lineEdit in self.lineedits: if (bool(lineEdit.property("mandatory")) and not lineEdit.text()): enable = False break self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(enable)if __name__ == "__main__": app = QApplication(sys.argv) form = ContactDlg() form.show() app.exec_() |
运行结果：
以上这篇python3+PyQt5 自定义窗口部件--使用窗口部件样式表的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/xiaoyangyang20/article/details/55224242
