How to access Qt GUI from an library using qt designer form

[VRonin]

Can you post your code from which you call show_dialog1( ); ?

[Srujan]

@VRonin
simply I have called 'show_dialog1();' from one of exported functions in shared library..

[VRonin]

I suspect you are not creating the application. try Q_ASSERT(QCoreApplication::instance()); if it asserts (i.e. instance() returns NULL) then it means you simply forgot to crate the QApplication before creating any QWidget

[SGaist]

The question you are not answering is: are you working on that software code source directly ?

[Srujan]

@SGaist
yes

[SGaist]

Ok, then are you converting it to a full-blown Qt application ?

[Srujan]

@SGaist
If you are talking about- Cryptoki manager then i am not working on that application. I working on the library that is used to test with cryptokimanager(thrid party standard application).
As specified earlier, in my library there is a need of dialog part.

[SGaist]

So you are going to call the Cryptoki manager application from your code ?

[Srujan]

@SGaist
yes

[SGaist]

What's still not clear is whether you are writing a full-blown Qt application for that. Is it the case ?

[Srujan]

@SGaist yes now i have created separate qt application and invoking that application from library using pipe mechanism..
Now the issue is 'getting value from that application(what ever entered in qlineedit of dialog box)'

[jsulm]

@Srujan Your Qt application could write to stdout and your library would read stdout of that application and parse it. See the documentation for QProcess.

[Srujan]

@jsulm Thanks it worked..