[Interest] Migrating QWeakPointer to Qt5

[Bo Thorsen]

Den 06-05-2016 kl. 07:35 skrev Tom Isaacson:
> I'm moving some Qt4.8.2 code which uses QWeakPointer to Qt5.6.  Simplifying a lot it looks like this:
>
> class MySettings : public QObject
> {
>     Q_OBJECT
> }
>
> class MyClass : public QObject
> {
>     Q_OBJECT
>
> private:
>     QWeakPointer<MySettings> m_xSettings;
> }
>
> MyClass::MyClass(MySettings* pSettings, QObject* pParent)
>     : QObject(pParent)
>     , m_xSettings(pSettings)
> {
> }
>
> but when I compile under Visual Studio 2013 I get this error:
> error C2664: 'QWeakPointer<MyClass>::QWeakPointer(const QSharedPointer<T> &)' : cannot convert argument 1 from 'MySettings *' to 'const QWeakPointer<MySettings> &'
>
> I tried changing the QWeakPointer to a QPointer but now I'm getting:
> error C2440: 'static_cast' : cannot convert from 'QObject *' to MyClass *' (GeneratedFiles\Debug\moc_MyCode.cpp)
>
> Is there a recommended method for migrating the use of QWeakPointer into Qt5?

With this code, you need QPointer.

Bo Thorsen,
Director, Viking Software.

-- 
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