I am confused about the communication between Qt and QML

xhsoldier

several questions:

In QML how to call function in Qt C++?
In QML how to connect signal to Qt C++ slots?
In Qt C++ how to manage the QML element? For example, change the property of the item, create the item dynamically?
In Qt C++ how to connect signal to QML slots?
In Qt C++ how to call functions in QML?

Sorry, I am new to QML, but these topic is very important for implementing the application. In General, the question is the communication methods between Qt C++ and QML.

Eddy

Have you found "this wiki":http://developer.qt.nokia.com/wiki/Category:Developing_with_Qt::Qt_Quick?

Especially the datasharing topic should interest you there.

diro

For QML to call C++ function is in the tutorial.
http://doc.qt.nokia.com/latest/qml-extending-tutorial-index.html

For C++ to manage QML, it would be a bit complex, the main concept is MetaObject
Call function:
http://www.lothlorien.com/kf6gpe/?p=309

Property:
http://stackoverflow.com/questions/5709820/communication-between-c-and-qml

xhsoldier

I am now quite clearly. In all, there are three basic methods:

through signal/slot
Invokable method
property change

andre

All these are very closely related:

Slots are invokable methods (though not the other way around), and property changes must have a notification signal in order to work. Often, the setter methods of a property are even defined as slots.