[solved] Which object type is QObject::sender()?

Hi mates!

When I receive a signal, I'd like to know in my SLOT if the sender is a QDockWidget, how can I test which kind of object is QObject::sender()?

There is a method called isA but I guess is obsolete because is not available on qt4.5

Any idea?
Thanks in advance.


EDIT:

BTW, Why doesn't work this:
QDockWidget* dock=(QDockWidget*) QObject::sender();
But this works perfectly:
QObject* sender = const_cast<QObject*>(QObject::sender());
QDockWidget* dock = static_cast<QDockWidget*>(sender);

simply cast sender() to QDockWidget and see if the pointer is valid.

Use qobject_cast.

Quote:

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Originally Posted by ricardo

QObject* sender = const_cast<QObject*>(QObject::sender());
QDockWidget* dock = static_cast<QDockWidget*>(sender);

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you also can use the Qt way

Code:

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QDockWidget* dock = qobject_cast<QDockWidget *>(QObject::sender());

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Quote:

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Originally Posted by Lykurg

simply cast sender() to QDockWidget and see if the pointer is valid.

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Do you mean !=NULL?

Quote:

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Originally Posted by ricardo

Do you mean !=NULL?

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From the docs:

Quote:

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T qobject_cast ( QObject * object )
Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns 0.

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So

Code:

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QDockWidget *dock = qobject_cast<QDockWidget *>(QObject::sender());
if(dock)
{
  // sender is a QDockWidget
}

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... if you only dealing with a small number of dock widgets in you application and the slot has a pointer to them you can also of course use:

Code:

---

if (myglobalpointer == QObject::sender())
//...

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Quote:

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Originally Posted by Lykurg

From the docs:

So

Code:

---

QDockWidget *dock = qobject_cast<QDockWidget *>(QObject::sender());
if(dock)
{
  // sender is a QDockWidget
}

---

... if you only dealing with a small number of dock widgets in you application and the slot has a pointer to them you can also of course use:

Code:

---

if (myglobalpointer == QObject::sender())
//...

---

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Thanks a lot. Solved.