[Qt-interest] Fwd: Re: Some questions about QML

[Bill King]

On behalf of the QML team lead.

> -------- Original Message --------
> Subject:        [Qt-interest] Some questions about QML
> Date:   Sun, 1 Nov 2009 13:33:01 +0100
> From:   ext Jabot Corentin
> <corentin.jabot at gmail.com><mailto:corentin.jabot at gmail.com> To:    
> qt-interest at trolltech.com<mailto:qt-interest at trolltech.com>
> <qt-interest at trolltech.com><mailto:qt-interest at trolltech.com>
>
>
> Hi guys.
>
> I built my first QML application yesterday, using the git sources
> repository. Inside a transparent widow, I put a transparent QMlView in
> which I load a simple qml file In order to reproduce an UI that I have
> already done with standard Qt widgets. I compare the to applications. The
> one with the standards widget takes 1 Mo RAM and the one with the QMlView
> and the qml file 16Mo... does that is normal or going to be fixed ?

This will be improved.  The greatest saving we will make is by improved pixmap 
caching.

16MB is higher then we've seen ourselves.  Most of our examples use less than 
12MB.

> Second point, will the c++/qml communication will be improved ?
>
> It's seems there is no other way than properties to communicate between c++
> and qml and the doc said the properties are limited to 30 by context, that
> is quite few. My purpose is to build UI with QML and treatment with c++
> native code. It will be great if we could expose whole object to qml as we
> can for the ecma scripts and use the signals/slots !

There is no 30 property limit.  Can you tell us where you read that?

You can expose the whole object to QML, including all signals, slots, and 
properties.  See QmlContext::setContextProperty()

> My last question is about network and security. Can we disable network
> download from web site (except predefined trusted domains for example ?)

QmlEngine::setNetworkAccessManager() allows you to provide your own access 
manager.

> The declarative UI is really great, I love it And hope It will be released
> soon. By the way, Is there any approximated date for Qt 4.7 and qml ?

There will be a release that works with Qt 4.6.  I cannot provide a release 
date for 4.7 at this stage.

-- 
Martin.