[Interest] QML global variables?

[Jérôme Godbout]

Yeah, you're right. I was talking about using a JS dictionary for property
value.

ex:
property var myJSDictionary: ({ 'key1': myItemId, 'key2': myItem2 })
or
property var myEmptyJSDictionary: ({})

Since you had a single property for appData used by multiple object I was
thinking it could have been your use case. In the case of a dictionary you
need to merge setting and assign it again to take effect and emit the
change. But This is not directly related to your question.

On Tue, Jan 6, 2015 at 2:24 PM, Jason H <jhihn at gmx.com> wrote:

> Many thanks.
>
> What do you mean by "Note: If your data are js dictionary make sure to
> merge left or right the data before assignation."
> If I use "*property var screenData: windowsUniqueId_.appData" then it
> should create a property binding, and merging should not be needed,
> correct?*
>
>
> *Sent:* Tuesday, January 06, 2015 at 2:14 PM
> *From:* "Jérôme Godbout" <jerome at bodycad.com>
> *To:* "Jason H" <jhihn at gmx.com>
> *Cc:* "interest at qt-project.org" <interest at qt-project.org>
> *Subject:* Re: [Interest] QML global variables?
>  You can try to use a singleton, seem like what you need.
>
> Inside qmldir:
> *singleton Settings 1.0 Settings.qml*
>
> At the beginning of Settings.qml
> *pragma Singleton*
> *// import goes here*
> *QObject*
> *{*
>   *property var appData*
> *}*
> Then you can use the *Settings.appData*
>
> Or you can use the cascading into scope. Each your screen should be able
> to reach the Windows id (make sure to never use it again)
>
> *Main.qml*
> *Window *
> *{ *
> *  id: windowsUniqueId_*
> *  property var appData*
> *  Screen1 {}*
> *  Screen2 {}*
> *}*
>
> *Screen1,2,3.qml:*
> *Rectangle*
> *{*
> *  property var screenData: windowsUniqueId_.appData*
> *}*
>
> Note: If your data are js dictionary make sure to merge left or right the
> data before assignation.
>
> On Tue, Jan 6, 2015 at 2:02 PM, Jason H <jhihn at gmx.com> wrote:
>>
>> What is the proper way to declare a dynamic global?
>>
>> Currently my app is set up with
>> main.qml:
>> Window {
>>  property var AppData;
>>  Screen1 { onEnter: { screen1.screenData = appData.screen1 }, onExit: {
>> appData.screen1 = screen1.screenData }}
>>  Screen2 { onEnter: { screen2.screenData = appData.screen2 }, onExit: {
>> appData.screen2 = screen2.screenData }}
>>  Screen3 { onEnter: { screen3.screenData = appData.screen3 }, onExit: {
>> appData.screen3 = screen3.screenData }}
>> }
>>
>> Screen1,2,3.qml:
>> Rectangle {
>>  property var screenData;
>> }
>>
>> I'd like to just have the screens and Window reference the same variable
>> so I don't have to keep moving the data around because now I have async
>> things (data load) happening between screens.
>>
>>
>> Thanks
>> _______________________________________________
>> Interest mailing list
>> Interest at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/interest
>
>
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