XRandr: change notifications

[Bipin George Mathew]

When we use Xrandr to rotate/resize the screen, how does xrandr inform the
app that it needs to be resized - example: the gnome panel needs to be
resized given the new size. Since these apps can exist without a window
manager running, what X events does an app need to listen to inorder to draw
correctly to the new size OR are apps oblivious to resolution/rotation
changes and this is handled at a much lower level?

Thanks,
Bipin
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