04.PyQt5頂層視窗設定

去掉頂層視窗，自行添加最小、最大、關閉按鈕。且三個按鈕始終位于視窗右上方。

import sys
from PyQt5.Qt import *
class App(QWidget):
    def __init__(self):
        super().__init__()
        self.resize(500,500)
        self.wondow_status()
    def wondow_status(self):
        self.setWindowFlags(Qt.FramelessWindowHint)
        self.btn_w = 25
        self.btn_h = 25
        min_btn=QPushButton(self)
        self.min_btn=min_btn
        min_btn.resize(self.btn_w,self.btn_h)
        min_btn.setStyleSheet('background-color:green')
        min_btn.pressed.connect(self.window_min)

        max_or_nor_btn=QPushButton(self)
        self.max_or_nor_btn=max_or_nor_btn
        max_or_nor_btn.resize(self.btn_w,self.btn_h)
        max_or_nor_btn.setStyleSheet('background-color:yellow')
        max_or_nor_btn.pressed.connect(self.window_max_or_nor)

        close_btn=QPushButton(self)
        self.close_btn=close_btn
        close_btn.resize(self.btn_w,self.btn_h)
        close_btn.setStyleSheet('background-color:red')
        close_btn.pressed.connect(self.window_close)
    def window_min(self):
        self.showMinimized()
    def window_max_or_nor(self):
        if self.isMaximized():
            self.showNormal()
        else:
            self.showMaximized()
    def window_close(self):
        self.close()
    def resizeEvent(self, qre):
        print(qre.size().width())
        self.min_btn.move(self.width() - self.btn_w * 3, 0)
        self.max_or_nor_btn.move(self.width()  - self.btn_w * 2, 0)
        self.close_btn.move(self.width() - self.btn_w * 1, 0)
if __name__ == '__main__':
    app=QApplication(sys.argv)
    window=App()
    window.show()
    sys.exit(app.exec_())