Dec 18, 2021 &183; In this flutter example tutorial, we will see how you can get a full-screen photo in Flutter and when draggedswiped down can be dismissed. Gesture Detector is used to detect user's gesture such as tap, double tap, drag, flick, pinch, zoom, panning etc. How to DRAG and DROP widgets in Flutter. . We set a global key to this Stack. API docs for the ImageShowPageView class from the flutterdragscalewidget library, for the Dart programming.