[Interest] QML objects and QMetaMethod

[Vlad Stelmahovsky]

well, the problem is that createTree() does not registered in your 
QObject-derived class. its a part of instantiated object ant metasystem 
have no clue about it

I think you need to register it 1st in header somehow

On 10/7/18 12:41 PM, Jean-Michaël Celerier wrote:
> Yes, that's what I'm doing, but I 'm typing the code in the mail - 
> sorry for the typo.
>
> Here's something even more fundamental : the following prints all the 
> functions if my type is a QtObject descendant, but it does not if my 
> type is a MyLib.MyObject descendant
>
>     for(int i = 0; i < obj->metaObject()->methodCount(); i++) {
>       qDebug() << obj->metaObject()->method(i).name();
>     }
>
>
> -------
> Jean-Michaël Celerier
> http://www.jcelerier.name
>
>
> On Sun, Oct 7, 2018 at 12:39 PM Vlad Stelmahovsky 
> <vladstelmahovsky at gmail.com <mailto:vladstelmahovsky at gmail.com>> wrote:
>
>     QMetaMethod::invokeMethod(obj, "createTree");
>
>     On 10/7/18 12:34 PM, Jean-Michaël Celerier wrote:
>>     Hello,
>>     I have the following code :
>>
>>     Foo.qml :
>>
>>         MyLib.MyObject {
>>           function createTree() { /* stuff */ }
>>           property string host: "ws://whatever.com <http://whatever.com>"
>>         }
>>
>>     cpp :
>>
>>         namespace lib {
>>           class MyObject : public QObject { Q_OBJECT };
>>         }
>>         ...
>>         QQmlComponent c(engine);
>>         c.setData("content of Foo.qml", QUrl());
>>
>>         auto obj = c.createObject();
>>         QString host = QQmlProperty(obj, "host").read();
>>         QMetaMethod::invokeMethod("createTree");
>>
>>     Reading the "host" property works fine so the QML object is
>>     correctly instantiated. But the invokeMethod call gives me a
>>     warning :
>>
>>         QMetaObject::invokeMethod: No such method
>>     'lib::MyObject::createTree()'
>>
>>     The weird thing being: it works fine if I replace MyLib.MyObject
>>     with QtObject on the QML side.
>>     Of course I want to use some additional methods present in
>>     MyObject so this is not a solution.
>>
>>     Anyone knows what is going on here ?
>>
>>     Thanks,
>>     Jean-Michaël Celerier
>>
>>
>>
>>
>>
>>     -------
>>     Jean-Michaël Celerier
>>     http://www.jcelerier.name
>>
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