CODEWITHSUNDEEP
qtqml
Spottsworth
Spottsworth

Reputation: 415

How to reference the calling object in QML

Is there a way to get a reference to the calling object in QML? I'm looking at something which is equivalent to the 'this' pointer in QML

Example: Say I have a component which serves as a backend for a graphical element such as a seekbar for a video player. This backend will take in the current and total durations of the video as input and periodically provide an update to the graphical seekbar. Now if there is a signal handler in this backend for a signal which sends current and total durations , it might look something like this:

Connections {
  target: sender //this

  onSendSeekUpdate()
  {
    //do something
  } 
}

Of course I guess this can be implemented in C++ and then imported into QML. But I was just wondering if QML also supports this? So that I can straight away write such hooks in QML.

Upvotes: 5

Views: 5286

Answers (1)

TheBootroo
TheBootroo

Reputation: 7518

In QML you can use any id as a pointer, as well as any QObject derived type property, so in your code example, we can change the target of the Connection dynamically and still use the same var in the signal handler to point on the sender :

Connections {
    target: myitem; // change it when you need
    onMySignal: {
        target.doSomething(); // just use target here as it points on the listened object
        // it's just like 'sender()' in Qt/C++
    }
}

Not sure it was what you were asking for, but I tried to understand your explanation ;-)

Upvotes: 4

Related Questions