learning all thing about signals and slots

[Alex22]

Hi

I want to know and learn all thing about signals ans slots and connecting of them. are there any references that explain completely. Thanks for any help.

[Qiieha]

http://doc.qt.io/qt-5/signalsandslots.html

[Alex22]

http://doc.qt.io/qt-5/signalsandslots.html

Qiieha, thanks but in this Doc., for example there is no explanation about connecting a signal to another signal that we could connect a signal to another signal. are there other references that have more examples and complete explanation?

[Vikram.Saralaya]

You cannot connect a signal to another signal.. you can may be check QSignalMapper documentation..

[Alex22]

You cannot connect a signal to another signal.. you can may be check QSignalMapper documentation..

We could. for example:

connect(lineEdit, SIGNAL(textChanged(const QString &)),
this, SIGNAL(updateRecord(const QString &)));

connect(lineEdit, SIGNAL(textChanged(const QString &)),
this, SIGNAL(updateRecord(const QString &)));

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[yeye_olive]

You cannot connect a signal to another signal.. you can may be check QSignalMapper documentation..

Yes you can. This causes the second signal to be emitted whenever the first one is, and is in fact quite useful to simulate "exporting" a signal from a private object.

[Vikram.Saralaya]

@yeye_olive I never encountered a case for that! Thanks for that info.. might be useful someday
@Alex22 my bad sorry!