QML and Qt Quick

@QtWorld said in guys can u help me with these problems:

i have so little info about this web site

What website?

receive data from there using udb with python code and send it to qt creator in windows

I don't know what UDB is and you don't send anything "to QtCreator", since it's an IDE like Eclipse or Visual Studio.

Isn't PX4 software for drones?
Unless you are lucky and find somebody who had used this before, I doubt that we can help with that.

Here's a general guide on how to use QML in a Qt Python app.

https://doc.qt.io/qtforpython-6/tutorials/qmlapp/qmlapplication.html

I don't know how to prevent the qml from deleting the shared pointer.
So I return a new classs to qml, it works well. Hope anyone can tell me if it corrected.

} else if(role == modeRole) { if(deviceVariable.modeModelPtr.isNull()) return QVariant(); //return QVariant::fromValue(deviceVariable.modeModelPtr.data()); return QVariant::fromValue(new ModeModel(*deviceVariable.modeModelPtr)); } }; DeviceVariables { // .... QSharedPointer<ModeModel> modeModelPtr; } class ModeModel : public QAbstractListModel { public: //.... ModeModel(const ModeModel &other) : QAbstractListModel(other.parent()) { modeList = other.modeList; } private: QList<ModeData> modeList; };

I debug the ~ModeModel() and found the qml will auto delete the new ModeModel() which I provide in the cpp.

That's easy: Your file is named "Main.qml" and you try to load it as "main.qml".

hello, i wonder why toVariant() dont work for me，toVariant xxx is not a function

where the explonation....?

@p3c0 nice job!

Hi and welcome to devnet,

You might want to check the new Qt Graphs module.

Hope it helps

Although you used a different solution, I think doing the following should work:

Connections { target: myLoader.item function onTextFieldClicked(yValue, itemHeight) {...} }

My bad, here's the tree project :

appTestQML/
├── CMakeLists.txt
├── Main.qml
├── resources.qrc
├── backend.cpp
├── backend.h
└── main.cpp

@Bob64 Thanks for your hint!
I'm trying this way...

@SGaist
I restart the computer, delete all obj file and rebuild , now it runs fine.
stupid microsoft -_-

…please don’t post images of text. Post your code directly instead and use the </> code tags to mark it correctly.

Hi, I have fixed it now.
Calling the wrapper function for the moveRows() in the DropArea does the job.
Initially I tried to call it wrongly (mode.moveItNow() does not work because I think the model in here is the QAbstractListModel object and not my upper class which inherits from QAbstractListModel.
So all the meme related function are not even necessary...

so I replaced the model.moveItNow() with rootStore.pathToProperty.MyCustomModel.moveItNow()

I hope that explains it for those who will end up with a similar problem/question

Would it be possible to have a picture of what you are getting and what you are expecting to get ?