Can we declare global variable in QML file?

Question

I want to do something similer to following code:

//test.qml
import QtQuick 1.0
Item 
{
    var globalforJs =10;

    function increment() // JavaScript function
    {
        globalforJs++;
    }
    ....
QML Code

Can we have global variable in QML file and access it from the JavaScript function?

coyotte508 · Accepted Answer · 2016-11-17T16:54:52.850

28

Try property int globalForJs: 10;

If you want a variable that can take any type:

property var globalForJs: 10

Prior to QML 2, use the variant keyword instead of var.

edited Nov 17 '16 at 16:54

answered Sep 22 '11 at 16:10

coyotte508

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Thanks for the reply, can this `property variant globalForJs: 10` can be accessed from the java script function which is in QML file itself? – psp1 Sep 23 '11 at 04:23
yes it can. All properties of a QML object can be accessed by any javascript function defined inside it. – coyotte508 Sep 23 '11 at 09:18
But how to make this property `private`, so it is not seen by other QML stuff? – KernelPanic Oct 08 '15 at 11:17
I don't think you can do that (javascript is not big on private member variables) – coyotte508 Oct 08 '15 at 16:03

score 8 · Answer 2 · edited Sep 15 '15 at 11:39

8

Using int or variant properties do not create a javascript variable, but rather a semantically different generic QML property (see here)

Before Qt 5, global javascript variables were recommended to be defined in a separately imported javascript file, however Qt 5 adds a var type property support.

edited Sep 15 '15 at 11:39

SuperBiasedMan

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answered Jan 05 '14 at 14:33

Šarūnas Valaškevičius

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score -3 · Answer 3 · edited Mar 06 '15 at 10:43

-3

the thing which you want to make global should be done like in this example

property variant name:"john"//i want this to be global
onCreationCompleted(){
Qt.name = name
}

whereever you want to use the name property use like Qt.name instead of just name.this also applicable for any ids of controls

edited Mar 06 '15 at 10:43

Sнаđошƒаӽ

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answered Jan 20 '15 at 18:50

John Ankanna

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Can we declare global variable in QML file?

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