= Windows with gradient backgrounds =

On the #pyqt channel on Freenode, `felipe__` asked if it was possible to change the background colour of a window.

This code shows how it can be done with a fixed gradient. If you are subclassing QWidget or another widget class, it may be worth reimplementing its `resizeEvent()` method to modify the gradient so that it changes when the window is resized.

{{{
#!python

import sys
from PyQt4.QtGui import *

if __name__ == "__main__":

    app = QApplication([])
    
    w = QWidget()
    
    p = QPalette()
    gradient = QLinearGradient(0, 0, 0, 400)
    gradient.setColorAt(0.0, QColor(240, 240, 240))
    gradient.setColorAt(1.0, QColor(240, 160, 160))
    p.setBrush(QPalette.Window, QBrush(gradient))
    w.setPalette(p)
    
    w.show()
    app.exec_()
}}}