Question

PyQt4 how to do if the window is minimized, call a method expand that window

please tell me how to do it

I will be very grateful

Answer 1

You can check the current state of a QWidget by calling its windowState() method. To change the state you pass a new state to setWindowState().

Here’s an example app that checks every 5 seconds to see if it’s minimised. If it is then the window is restored.

This is just as an example – checking every 5 seconds for a minimised window and restoring it would be an evil thing to do in an app ;).

import sys
import time
from PyQt4.QtGui import QApplication, QWidget
from PyQt4.QtCore import QTimer, Qt

class MyWidget(QWidget):
    def __init__(self):
        QWidget.__init__(self)

        self.timer = QTimer()
        self.timer.setInterval(5000)
        self.timer.timeout.connect(self.check_state)
        self.timer.start()

    def check_state(self):
        if self.windowState() == Qt.WindowMinimized:
            # Window is minimised. Restore it.
            self.setWindowState(Qt.WindowNoState)


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