Multiple Inheritance & Qt

[kefeng.chen]

hello all,

I have met a problem while using the Multiple Inheritance with Qt with some codes like this:

class SomeClass: public ClassFromUI, public MyClassDrivedFromQWiget
{
    Q_OBJECT
    ....
}

class SomeClass: public ClassFromUI, public MyClassDrivedFromQWiget
{
    Q_OBJECT
    ....
}

To copy to clipboard, switch view to plain text mode 

the class ClassFromUI is generated by the uic from a .ui file that i cannot change the content. It looks like:

class ClassFromUI : public QWidget
{
    Q_OBJECT
    ....
}

class ClassFromUI : public QWidget
{
    Q_OBJECT
    ....
}

To copy to clipboard, switch view to plain text mode 

the class MyClassDerivedFromQWidget writen by me, looks like:

class MyClassDerivedFromQWidget : public virtual QWidget
{
    Q_OBJECT
    ....
}

class MyClassDerivedFromQWidget : public virtual QWidget
{
    Q_OBJECT
    ....
}

To copy to clipboard, switch view to plain text mode 

when i compile them, i get the following errors:

...
...warning: virtual base 'QWidget' inaccessible in 'SomeClass' due to ambiguity
...error: 'QObject' is an ambiguous base of 'SomeClass'

...
...warning: virtual base 'QWidget' inaccessible in 'SomeClass' due to ambiguity
...error: 'QObject' is an ambiguous base of 'SomeClass'

To copy to clipboard, switch view to plain text mode 

Can anyone tell me, how to deal with this error???

thanks

kefeng