from PySide.QtCore import *
from PySide.QtGui import *
import time

class LogWindow(QProgressDialog):

    def __init__(self, parent=None):
        super(LogWindow, self).__init__(parent)
        self.setWindowModality(Qt.WindowModal)
        self.setWindowTitle('converting stuff')
        self.setLabelText('generating jpgs')
        self.setMinimum(0)
        self.setMaximum(1000)
        self.setAutoReset(False)
        self.setAutoClose(False)
        self.setMinimumDuration(1)
        self.perform()

    def perform(self):
        #command = 'rvio -vv test.#.jpg -o /tmp/test2.#.png'
        for i in range(1000):
            time.sleep(.01)
            print i
            self.setLabelText('frame %s' % (i+1))
            self.setValue(i)
            if self.wasCanceled():
                break
            i += 1


if __name__ == '__main__':
    import sys
    app = QApplication([])
    lw = LogWindow()
    lw.show()
    sys.exit(app.exec_())