How send me data json from QML in C++?

Trikrista

I tried make this so:
@
//main.qml
Rectangle {
//---
signal sgSendJSON(var v)
function sendJSON() {
var v = {title: "text", text: "text"}
sgSendJSON(v)
}
//---
}

//main.cpp
//---
pView = new QQuickView;
QObject *pObject = pView->rootObject();

connect(pObject, SIGNAL(sgSendJSON(QVariant)), this, SLOT(SendJSON(QVariant)));
//---
@

But I failed(

JKSH

Hi,

Please describe what you mean by "failed". Did your application fail to compile? Did it compile but the rectangle failed to show up? Or ...?

Anyway, see "Connecting C++ Objects to QML Objects":http://doc.qt.io/qt-5/signalsandslots-syntaxes.html#connecting-c-objects-to-qml-objects

Trikrista

The program runs without errors.

But I don't sure that correctly choose parameter slot and signal (QVariant).
And I don't know what get data JSON from QVariant.

p3c0

Hi,

@
var v = {title: "text", text: "text"}
@

I think this is not a JSON format as the key should be a string format i.e in "".
Its more like a map which you can convert to on C++ side
@
void SendJSON(QVariant v) {
qDebug() << v.toMap();
}
@

SpongeBernd

You can get the JavaScript object's property values like that:

@
void SendJSON(QVariant v) {
QString title = v.toMap().value("title").toString();
QString text = v.toMap().value("text").toString();
}
@

Trikrista

Thanks. This is what I need