[Bug 157785] New: KComboBox's returnPressed signals not working

[Amroth]

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http://bugs.kde.org/show_bug.cgi?id=157785         
           Summary: KComboBox's returnPressed signals not working
           Product: kde
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs kde org
        ReportedBy: e9.amroth gmail com


Version:            (using Devel)
Installed from:    Compiled sources
Compiler:          gcc version 4.2.1 (SUSE Linux)
 
OS:                Linux

I am using a KComboBox with popup completion to enter an email address, but also allow to use the popup to choose another email from a predefined list.
I then connected the KComboBox's "returnPressed()" signal to a slot in my class; but when I press the enter/return key, no signal is emitted; there is no debug message in my console output (all debug areas are enabled from kde4's kdebugdialog) and my method isn't called.

That's the same with the returnPressed(const QString &) signal.

However, connecting my slot to the internal QLineEdit works as intended, typing the Enter key calls my slot.

two examples to clarify. This doesn't work:
>  connect( handleCombobox_, SIGNAL(   returnPressed()  ),
>           this,            SLOT  (      updateView()  ) );
The slot is never called and no debug message is output to console.
This does work:
>  connect( handleCombobox_->lineEdit(), SIGNAL(   returnPressed()  ),
>           this,                        SLOT  (      updateView()  ) );

The API clearly states the presence of these signals in KComboBox: http://api.kde.org/4.x-api/kdelibs-apidocs/kdeui/html/classKComboBox.html
I looked at the source it should emit at least one of these two signals when the KComboBox has a line edit and is enabled, but I have an enabled QLineEdit into the combobox and they are not emitted at press of the enter key.