[Qt-interest] Signal Slot not working

[tang ke]

于 2010年06月21日 05:09, Matthias Pospiech 写道:
> I have a dll emitting error messages:
>
> void QMicosPolluxController::Error(const char * errorMessage)
> {
>     emit errorOccurred(toQString(errorMessage));
> }
>
>
> which is handled in the gui (using the dll)
> void DialogMicosController::connectSignalSlots()
> {
>     connect(controller, SIGNAL(errorOccurred(QString)), this, 
> SLOT(OnControllerError()));
>   
you should write the next:

    connect(controller, SIGNAL(errorOccurred()), this, 
SLOT(OnControllerError()));


> }
> void DialogMicosController::OnControllerError(QString error)
> {
>     ui->labelError->setText(error);
> }
>
> However the function OnControllerError is never called.
> If I copy all classes to the gui project (thus no dll), the effect is 
> exactly the same.
> The SLOT is never called.
>
> Matthias
>
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