(no subject)

Hi, Every One
  I found that GtkFileSelection is some difficult to use. I mean, I want to force it to pickup a file name, not a directory name, but even when there's no file selected, the OK button still can be clicked. I did add some signals to the button to prevent it, but there's always some problems with the code. So can anybody give me some suggestions (or codes) to do it?
  Thank you very much.

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