PyQt: 练习 QFontDialog

import sys
from PyQt5.Qt import *


class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setup_ui()

    def setup_ui(self):
        self.setWindowTitle("Qt桌面应用程序")
        self.resize(500, 300)

        self.font = QFont()
        self.font.setFamily("黑体")
        self.font.setPointSize(20)

        self.label = QLabel(self)
        self.label.setText("选择字体")
        self.label.resize(500, 200)
        self.label.setStyleSheet("background-color:cyan")

        self.push_button = QPushButton(self)
        self.push_button.setText("show按钮")
        self.push_button.move(30, 250)
        self.push_button_2 = QPushButton(self)
        self.push_button_2.setText("getFont按钮")
        self.push_button_2.move(130, 250)

        def push_button_clicked():
            self.dialogue_func()
            # self.font_dialogue.open()
            # self.font_dialogue.exec()
            self.font_dialogue.show()
            self.dialogue_activities()

        self.push_button.clicked.connect(push_button_clicked)

        def push_button_2_clicked():
            self.font_dialogue = QFontDialog(self)
            self.font_result = self.font_dialogue.getFont(self.font, self, "字体选择", QFontDialog.MonospacedFonts)
            self.label.setText(f"最终字体：{self.font_result[0].family()} 确定：{self.font_result[1]}")

        self.push_button_2.clicked.connect(push_button_2_clicked)

    def dialogue_func(self):
        self.font_dialogue = QFontDialog(self.font, self)
        self.font_dialogue.setWindowTitle("字体选择")
        self.font_dialogue.resize(400, 200)
        # self.dialogue.setModal(True)
        self.font_dialogue.setWindowModality(Qt.WindowModal)
        self.font_dialogue.setSizeGripEnabled(True)
        # self.font_dialogue.setCurrentFont(font)
        # self.font_dialogue.setOptions(QFontDialog.NoButtons | QFontDialog.MonospacedFonts)

    def dialogue_activities(self):
        self.font_dialogue.accepted.connect(lambda: self.label.setText(
            f"接受 结果：{self.font_dialogue.result()} 最终字体：{self.font_dialogue.selectedFont().family()}"))
        self.font_dialogue.rejected.connect(lambda: self.label.setText(
            f"拒绝 结果：{self.font_dialogue.result()} 当前字体：{self.font_dialogue.currentFont().family()}"))

        def current_fontChanged(font):
            self.label.setFont(font)

        self.font_dialogue.currentFontChanged.connect(current_fontChanged)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())