unselect an item when unloaded
remove anonymous cb
change delta time to detect activate event from 0.25 to 0.5
reuse innerWidth and Height to get the window size
correct a bug when invalidateDraw is called before Ui.App is created
use bind for cb
update sample for vertical slider
dont use the scope
correct the title
remove scope
remove scope
remove scope
remove scope
remove anonymous cb
clean up
clean up
add uploaddirectory sample