Hello,
i'm trying to display a QMessageBox from a non-GUI thread. For this i use
signal&slots:
in a QMainWindow based object i defined the slot.
In the sending object i defined the signal and in the c'tor i connect them.
Then, from a background thread, i emit the signal.
Connecting and emitting the signal is executed without error but the slot is
never executed.
Connect signal in c'tor:
> connect(this,SIGNAL(showNewWarning(cstr)),parent,SLOT(showNewWarning(cstr)),Qt::QueuedConnection);
Emit signal:
> emit showNewWarning("Programme did not fit in ram.");
I really think this should work.
This is Qt 4.8 on Mac OSX.
I have no custom event loop in the QApplication object.
The background thread was not created by my application. It is an audio
callback:
This may be the reason for the failure, but then i need a workaround. :-/
static OSStatus audioDeviceIOProc
(
AudioDeviceID /*inDevice*/,
const AudioTimeStamp* /*inNow*/,
const AudioBufferList* inInputData,
const AudioTimeStamp* /*inInputTime*/,
AudioBufferList* outOutputData,
const AudioTimeStamp* inOutputTime,
void* /*inClientData*/
)
{ ... }
Greetings from Germany,
... Kio !
--
http://k1.dyndns.org/Vintage/Sinclair/
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