[Glade-users] why expose_event made cpu so busy in glade?

There are some examples in <<Developing Linux Applications with GTK+ AND
GDK>> written
by Eric Harlow.Now I want to use glade to realize the clock example,and
I had made it.
but I have some questions.

when it is executing, I found mouse moved very very slowly.If I coverd
the drawingarea part with xterm,mouse moved well.
so I think expose_event made cpu busy .
Is there any way to solve it?

now in my callback.c,poping  a togglebutton down will call
at the end of  repaint ,there is
 will it call configure_event to configure the drawing area?
thank you in advance.

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