Catching a signal from an other class

gabor53

Hi,
I'm emitting a signal in ImageCorrectButton.cpp:

emit selectedFileChanged(m_selectedFile);

How can I catch this signal in an other class (mydelegate.cpp)?
Please show me an example if possible.
Thank you.

? Offline

Hi! See Signals & Slots.

ambershark

@gabor53 You definitely need to read the docs that @Wieland linked, but to give you the quick version:

class MyDelegate : public QObject
{
   Q_OBJECT

// ...

private slots:
   void fileChanged(QString);

// ...
}

void MyDelegate::someFunction()
{
   connect(myImageButton, SIGNAL(selectedFileChanged(QString)), this, SLOT(fileChanged(QString)));
}

void MyDelegate::fileChanged(QString)
{
   // this gets called on signal
}

myImageButton is a pointer to your ImageCorrectButton. I assumed the m_selectedFile was a QString and added that as the param type.