the idea for QImage/QPixmap-optimized widget occurred to me while
writing kimageviewer (see the kde-playground repo), unlike the widget I
wrote for kimageviewer this one supports drag-n-drop tho and is drop-in
replacement for QLabel when showing only a pixmap is required. the
widget also shows a small image while dragging ala ksnapshot
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
