setData()

[coderbob]

I have a QAction that I wish to use setData() on so I can reference a QWidget at a later date rather then using a QHash for a lookup table.

QAction *act = new QAction(this);
 
QWidget *randomWidget = new QWidget(this);
 
act->setData(randomWidget);

QAction *act = new QAction(this);

QWidget *randomWidget = new QWidget(this);

act->setData(randomWidget);

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Problem is when I want to get that QWidget back and use it. If I try to cast it

QWidget *returnWidget = qobject_cast<QWidget *>(act->data());

QWidget *returnWidget = qobject_cast<QWidget *>(act->data());

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I get "error: no matching function for call to ‘qobject_cast(QVariant)’"

If I try to set it directly

QWidget *widget = act->data();

QWidget *widget = act->data();

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I get "error: cannot convert ‘QVariant’ to ‘QWidget*’ in initialization".

In QVariant docs I am allowed to set my own user type data; so am I just misunderstanding the use of a QVariant?

Bob