Personally I vote for a simple low-overhead solution that enables one to mark the desired objects (and arrays) bindable. It does not have to be automatic but it must be possible and low overhead. Now using a ListModel to mirror/emulate array is not exactly the best possible use of the CPU time.
On 21.12.2010 1.47, "ext [email protected]" <[email protected]> wrote: >On 17/12/2010, at 11:54 PM, ext Ville M. Vainio wrote: > >> Currently, you cannot store javascript objects as properties in qml >> components, e.g. you can't do >> >> propery JSRef myobj >> >> function setCallback(f) { myobj = f }; >> >> On irc #qt-qml, this explanation was quoted: >> >> QQQ >> In QML "property var" cannot store JavaScript native objects, as we >> cannot bind to them. This might change in a future release. For now, >> more explicit warnings are generated when you accidentally do this. >> QQQ > >The core problem is that properties on a JS object don't give any >notification when they are changed (in contrast to a QObject, which uses >NOTIFY signals to inform when a property has changed). This means if you >bind to such a property, e.g. > >Text { text: myobj.textProp } > >the binding will *not* be updated if you do something like > >function myFunction() { myobj.textProp = "New Text" } > >This is the reason we don't currently support it -- we didn't want to >make it possible for these bindings to "silently fail" (and from memory >providing a warning for such bindings was also non-trivial). > >> I can't claim to understand the explanation, but I'm curious whether >> we will have this feature in the near future - as the lack of it seems >> to be a pretty fundamental shortcoming in QML, and workarounds (like >> storing the reference in a .js file, or using C++) seem quite hacky in >> comparison. > > >We certainly want to make JS/QML integration more seamless, but I'm not >sure exactly how or when this will happen. It's not currently planned as >part of the next release (QtQuick 1.1). > >Regards, >Michael >_______________________________________________ >Qt-qml mailing list >[email protected] >http://lists.qt.nokia.com/mailman/listinfo/qt-qml _______________________________________________ Qt-qml mailing list [email protected] http://lists.qt.nokia.com/mailman/listinfo/qt-qml
