Community work is just awesome.
I'll start hacking all this next week.
Thanks!
Edu
On Fri, Jun 10, 2011 at 14:27, Marc Puts <[email protected]>wrote:
> Hi Eduard,
>
> It's nice to hear that you're looking into the Svg contrib. :)
>
>
> On 06/10/2011 09:35 AM, Eduard Gamonal wrote:
> > Yep, I checked the source of those demos before sending the first
> > e-mail. It doesn't look hard to use. However, I don't know if I can
> > place it on top of an image and set the background to transparent.
> > It'd be great if Marc Puts saw this e-mail and could confirm it. My
> > worries aren't about developing but about chosing the wrong solution.
> > Unfortunately I don't have much time left for this project :(
>
> Yes, it should be possible to place the SVG on top of an image. Just be
> aware that the SVG widget (svg.embed.Svg) has an opaque white background
> by default. But you can easily override that, by either changing the
> appearance of the widget, or by creating your own widget that embeds the
> Svg element.
>
> However, there's another (and I think better) approach:
>
> > therefore, there should be 2 canvas? the stack would be:
> > - my canvas, where I paint
> > - all attendees canvas, which I can't edit and contains all attendee's
> > doodles.
> > - the slide, a png file in qx.ui.Image
>
> You can do all of this with a single Svg, because the G elements
> (svg.struct.Group) can function as layers. So you could create 3 group
> elements, which will contain the painting canvas, attendees doodles and
> the slide, respectively.
>
> You can include the slide PNG in the 3rd group using the
> svg.struct.Image element. This has the advantage that you can use Svg's
> features with regards to zooming, panning etc, without having to worry
> about keeping canvas and slide coordinates aligned.
>
>
> As for the data to transfer:
> - You could send accross the path data (as Daniel suggested). This is
> limited to Path elements, obviously.
> - You could send over full Svg code, using qx.xml.Element.serialize().
> - You could develop your own protocol to serialize the painting on one
> client and rebuilding it on the other clients.
>
>
> Regards,
> Marc
>
>
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