[Qgis-developer] Fwd: Qt 4.2 and Qtopia Core 4.2 Technology Preview Now Available

[Tim Sutton]

Hi

On 7/27/06, Brendan Morley <morb at beagle.com.au> wrote:
> Hi folks,
>
> I just wanted to say that I've had a bit of a browse at the Qt4.2 docs,
> and yes I too am salivating at the thought of getting Graphics View
> integrated into the QGIS map view.
>
> I personally think it would be good for:
>
> 1. Tool tips of features
> 2. Dragging around features
> 3. Rotating the map
> 4. Doing a pseudo "3D view", a bit like how some car satnavs do it (as
> you can do an affine transform on the Graphics View).

These would be really cool things!

>
> Also we could convert our selection routine over to the Graphics View
> routines.  If TrollTech have done their homework then it means less
> headaches for us (and more time available to implement GISsy things).
>

Yay

> One thing I would caution against is dumping all the contents of a
> freshly-opened layer onto the QGraphicsScene at once, as I (for example)
> have some layers with millions of objects on it.  A little bit of
> thought may have to go on here to add more items on as you pan, and
> maybe remove them when they go out of view.
>
> Also, we will have to see if the speed tradeoff is worth it (-:
>
> In other news, I think the new Undo framework will also be a great
> benefit.  I'd been eyeing off the Qt Solutions undo framework for a
> while (and wondering if it was worth replicating it), and so I am glad
> that they've brought it from behind the shroud.
>
> Finally I downloaded the Qt4 rsync and it's currently failing to compile
> (red lava lamp goes on!), so maybe we're still dealing with vapourware.
> (-:
>

I tried building some stuff (that compiles fine under 4.1.x) both
under win and linux with the qt4.2 snapshot it failed miserably... I
didnt have time to investigate why but it seems like you are right,
its not ready for prime time yet....


Regards

Tim
>
> Brendan
>
> On Fri, 2006-06-30 at 14:42 +0200, Martin Dobias wrote:
> > On 6/30/06, Tim Sutton <tim at linfiniti.com> wrote:
> > >
> > > [...]
> > >
> > > - Graphics View - A powerful 2D graphics area for highly optimized graphics
> > > development.  Graphics View replaces and builds on the former Q3Canvas,
> > > adding significant new functionality in the areas of item interaction,
> > > optimized level-of-detail rendering, affine item transformations, enhanced
> > > control over animations and enhanced drag and drop features.
> >
> > Hooray! Can't wait to try it! Unfortunately I'm leaving to Peru
> > already on Sunday, therefore I have no time to give it a try.
> > Nevermind, after two months I'll be back and will try to port map
> > canvas to the new graphics view, hopefully official release of Qt4.2
> > will be out that time.
> >
> > Also it's very likely that during the whole july and august I won't
> > read my mail so please don't expect replies from me during this period
> > :-)
> >
> > Bye,
> > Martin
> > _______________________________________________
> > Qgis-developer mailing list
> > Qgis-developer at lists.qgis.org
> > http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-developer
> >
>
>


-- 
Tim Sutton

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