CODEWITHSUNDEEP
pythonpyqt4
cicakman
cicakman

Reputation: 1990

pyqt4 python QLabel show when push button clicked

What i am trying to achieve is when user pressed push button, i want to show initially hidden QLabel. However, on that push button i have assigned a heavy duty scanning which takes about 2-3 minutes drive scanning. The QLabel is only appeared after scanning is finish, how do i make it appear once button is clicked and not after everything is done.

The codes

self.label_3.hide()
...
self.pushButton.clicked.connect(self._btn_cb)
...    
def _btn_cb(self):
    self.label_3.show() # here is the show code
    for filename in find_files("C://images//", '*.png'): # took roughly 2-3 minutes
        print filename

I am very new to python, thank you for assisting me

Upvotes: 0

Views: 1023

Answers (1)

Gary Hughes
Gary Hughes

Reputation: 4510

You just need to add a call to

QApplication.instance().processEvents()

Just after you call .show() on your label. This will force Qt to process events in your queue (showing the label) before it moves on to the rest of the code.

Make sure you import QApplication from QtGui at the start of your code.

from PyQt4.QtGui import QApplication

Upvotes: 1

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