[immodule-qt] Question about backspace key

[Choe Hwanjin]

Hi,
 
I'm making qt im module for korean.
And there is a problem on treat the backspace key.

When IC is in Compose mode by calling startComposition(), IC can not
send key event to app although filterEvent return false. So backspace
key is not working.

But when IC is in NotCompose mode by calling endComposition(), IC can
not receive backspace key event, so IC can not delete preedit string
currectly.

How do I process backspace key?

And How do I commit characters without using QIMEvent?

Thanks in advance.