title: how to refresh a qwidget for image display?
body: <p>I m using widget to display a set of images.each time only one image is displayed..a slider is also attached with this widget as i move the slider another images of set are displayed on widget according to slider value...there is a push button to start the operation of displaying images.
  Now my problem is when i click on push button first time.everything works fine but if i click on it second time to display another set of images.it doesn't get updated but if i move the slider it display images correctly even if i  move back the slider it works fine..
  so problem is only with the first time display of second set of images..so how to resolve it??</p>