PyQt: 练习 QColorDialog

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.color = QColor(170, 170, 255, 255)
        self.color_palette = QPalette()

        self.label = QLabel(self)
        self.label.setAutoFillBackground(True)
        self.label.setText("选择颜色")
        self.label.resize(500, 200)

        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("getColor按钮")
        self.push_button_2.move(130, 250)

        def push_button_clicked():
            self.dialogue_func()

            # self.color_dialogue.show()
            def open_slot():
                print("open_slot", self.color_dialogue.selectedColor().getRgb())

            self.color_dialogue.open(open_slot)
            self.dialogue_activities()

        self.push_button.clicked.connect(push_button_clicked)

        def push_button_2_clicked():
            self.color_dialogue = QColorDialog(self)
            self.color_result = self.color_dialogue.getColor(self.color, self, "颜色选择", QColorDialog.ShowAlphaChannel)
            self.label.setText(f"最终颜色：{self.color_result.getRgb()}")

        self.push_button_2.clicked.connect(push_button_2_clicked)

    def dialogue_func(self):
        self.color_dialogue = QColorDialog(self)
        self.color_dialogue.setWindowTitle("颜色选择")
        self.color_dialogue.resize(400, 200)
        # self.dialogue.setModal(True)
        # self.color_dialogue.setWindowModality(Qt.WindowModal)
        self.color_dialogue.setSizeGripEnabled(True)
        # self.color_dialogue.setCurrentColor(self.color)
        # self.color_dialogue.setOptions(QColorDialog.NoButtons | QColorDialog.ShowAlphaChannel)
        self.color_dialogue.setCustomColor(2, self.color)

    def dialogue_activities(self):
        self.color_dialogue.accepted.connect(lambda: self.label.setText(
            f"接受 结果：{self.color_dialogue.result()} 最终颜色：{self.color_dialogue.selectedColor().getRgb()}"))
        self.color_dialogue.rejected.connect(lambda: self.label.setText(
            f"拒绝 结果：{self.color_dialogue.result()} 当前颜色：{self.color_dialogue.currentColor().getRgb()}"))

        def current_color_changed(color):
            self.color_palette.setColor(QPalette.Background, color)
            self.label.setPalette(self.color_palette)

        self.color_dialogue.currentColorChanged.connect(current_color_changed)


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