[Interest] QMetaType::metaObjectForType

[Stephen Kelly]

On Monday, February 17, 2014 09:37:00 Graham Labdon wrote:
> Hi
> 
> I am trying to use QMetaType::metaObjectForType but it is always returning
> NULL
> 
> I have attached my class declaration and would be grateful if anyone can
> explain why I am getting a NULL return value
> 
> Many thanks
> metatype.txt
> metatype.txt
> Class.h -
> class Widget : public QWidget
> {
>     Q_OBJECT
> 
> public:
>     Q_INVOKABLE Widget(QWidget *parent=0);
>     Widget(const Widget& other);
>     ~Widget();
> };
> 
> Q_DECLARE_METATYPE(Widget)

Remove this line.

> 
> Class.cpp
> const int WidgetTypeID = qRegisterMetaType<Widget>("Widget");

Register the pointer. Don't specify the string:

 qRegisterMetaType<Widget*>();

Most likely you should move this from global scope to your usage section.


> 
> Usage
>         int id = QMetaType::type("Widget");

int id = QMetaType::type("Widget*");

Thanks,

-- 
Stephen Kelly <stephen.kelly at kdab.com> | Software Engineer
KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company
www.kdab.com || Germany +49-30-521325470 || Sweden (HQ) +46-563-540090
KDAB - Qt Experts - Platform-Independent Software Solutions
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