[SOLVED (work-around)] QML Calling overriden functions

PGPoulsen

Hi, I'm playing with inheritance in QML and don't know how to call an overridden function. Below is a simple example that, hopefully, explains what I'm trying to do.

Thanks in advance.
Yours
/peter

Parent.qml: @

import QtQuick 1.1

Rectangle {
function foo() {
console.log("Foo in parent")
}
}@

Child.qml:
@
import QtQuick 1.1

Parent {
function foo() {
console.log("Foo in child")
// here is the problem. Would like to do something like: Parent::foo()
}
}@

Output:
@
Foo in child
@

While I would like it to be:
@
Foo in child
Foo in parent
@

sierdzio

No time to check myself at the moment, but have you tried this:
@
import QtQuick 1.1

Parent {
id: root

function foo() {
    root.foo();
    console.log("Foo in child")
}

}
@

Probably won't work, or will introduce some nasty loop, but worth a try nonetheless.

PGPoulsen

Thanks for you answer, but unfortunately it does go into a nasty loop :-(

sierdzio

A kind of a workaround, if you are interested in those, would be this:
@
// Parent
import QtQuick 1.1

Rectangle {

signal foo();
onFoo: {
    console.log("Foo in parent");
}

}

// Kid
import QtQuick 1.1

Parent {
id: root

onFoo: {
    console.log("Foo in child");
}

}
@

This time I've checked - it works :)

sierdzio

Although in a reversed order to the one you were interested in. Parent reports first.

chriadam

https://bugreports.qt-project.org/browse/QTBUG-25942 and https://bugreports.qt-project.org/browse/QTBUG-26357 are related to this issue. Both of these are in scope for Qt 5.1.

Cheers,
Chris.

sierdzio

Good to know, thanks!

PGPoulsen

Thanks for all your answers. Very helpful :-)