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?

Solution 1

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.

Solution 2

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.

Comments

[psp1]

Thanks for the reply, can this property variant globalForJs: 10 can be accessed from the java script function which is in QML file itself?

[coyotte508]

yes it can. All properties of a QML object can be accessed by any javascript function defined inside it.

[KernelPanic]

But how to make this property private, so it is not seen by other QML stuff?

[coyotte508]

I don't think you can do that (javascript is not big on private member variables)