5-colordialog.py

#! /usr/bin/env python3


import sys
from PyQt4 import QtGui

class Example(QtGui.QWidget):
    
    def __init__(self):
        super(Example, self).__init__()
        self.initUI()

    def initUI(self):
        col = QtGui.QColor(0, 0, 0)

        self.btn = QtGui.QPushButton('COLOR', self)
        self.btn.move(20, 20)

        self.btn.clicked.connect(self.showDialog)

        self.frm = QtGui.QFrame(self)
        self.frm.setStyleSheet("QWidget { background-color: %s }"% col.name())
        self.frm.setGeometry(130,22,100,100)
        self.setGeometry(300, 300, 250,180)

        self.setWindowTitle('colordialog')
        self.show()

    def showDialog(self):
        col = QtGui.QColorDialog.getColor()
        if col.isValid():
            self.frm.setStyleSheet('QWidget { background-color: %s }'% col.name())


def main():
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()