[Bug 162307] New: little bug on screensaver, in preview mode, tab and application key can't resume the locked window

[Ericchiu]

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http://bugs.kde.org/show_bug.cgi?id=162307         
           Summary: little bug on screensaver, in preview mode, tab and
                    application key can't resume the locked window
           Product: kdesktop
           Version: unspecified
          Platform: Fedora RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs kde org
        ReportedBy: who418 yahoo com tw


Version:            (using KDE 3.5.8KDE 1.2)
Installed from:    Fedora RPMsFedora RPMs
OS:                Linux

I am very interested in linux stuff. 
Recently I found a bug on Kde screen saver.
When Entering screensaver mode 
Pressing any key on the keyboard would make the screen resume from saver.

However, When I In the screen saver Testing mode (preview)
pressing Tab key and application key (the key in near the right ctrl key)
has no response.

I have try do download the source code.

it's in the kdebase.

i found a file named scrnsaver.cpp
there is a function called grabkeyboard()

why system can't grab Tab and Application key in Testing mode?

thank you for your answering.