How can i know which signal come first among three signal?
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My software is connected with hardware. Hardware send three different signal through USB. I captures that signal into software.
How can I identify, which signal come first on software side?
I have three slot for three signal. One slot per each signal.
Qt has any class, which is give the information about signal order? or any C++ design pattern, which I can use to identify the signal order?
That three signal some many time from hardware. I wanted to find the order when it is come first time only.
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Hi,
How are you getting these hardware signals to your application ?
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Are you using multiple threads?
If the answer is no then the order of execution of the slots is guaranteed to be the order of emission of the signal.*
If multiple slots are connected to the same signal they will executed in the order they were connected**Sources:
'* http://doc.qt.io/qt-5/qt.html#ConnectionType-enum direct connection is equivalent to a call direct call to the slot, even if you force the queued connection signals invokeQCoreApplication::postEventwhich is a FIFO queue
** http://doc.qt.io/qt-5/signalsandslots.html#signals"La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
~Napoleon BonaparteOn a crusade to banish setIndexWidget() from the holy land of Qt
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Are you using multiple threads?
If the answer is no then the order of execution of the slots is guaranteed to be the order of emission of the signal.*
If multiple slots are connected to the same signal they will executed in the order they were connected**Sources:
'* http://doc.qt.io/qt-5/qt.html#ConnectionType-enum direct connection is equivalent to a call direct call to the slot, even if you force the queued connection signals invokeQCoreApplication::postEventwhich is a FIFO queue
** http://doc.qt.io/qt-5/signalsandslots.html#signals
