QGraphicsTransform
exe icon, transparent background, desktop show
qput crash. http error on ok
exif i18n

wtf smart pointer
in SildeDisplay, zoom the original image
gif play
progressbar

QGraphicsView translate bug: https://bugreports.qt-project.org/browse/QTBUG-15239
zoom on boot

qtransform perspective: http://www.qtcentre.org/threads/14000-Perspective-correction-with-QTransform
qgraphicsview performance: http://thesmithfam.org/blog/2007/02/03/qt-improving-qgraphicsview-performance/
center:  http://www.qtcentre.org/wiki/index.php?title=QGraphicsView:_Smooth_Panning_and_Zooming#Realizing_the_Pitfalls_with_QGraphicsView
check page on event
