The SVG 1.1 spec (see http://www.w3.org/TR/SVG11/text.html#TextOnAPath ) tells
us that the use of a negative value for startOffset is an error. However, in
the example at
http://srufaculty.sru.edu/david.dailey/svg/newstuff/textpath1.svg
as seen in IE/ASV, I've used it for a rather nice effect. Opera follows the
spec, but then it doesn't allow the effect I'm interested in .
So my question is if there is any way to accomplish the same sense of
continuous flowing text without using negative values? Why does a negative
value have to be an error?
David
----- Original Message -----
From: ddailey
To: svg-developers@yahoogroups.com
Sent: Saturday, July 19, 2008 7:49 AM
Subject: Re: [svg-developers] Re: Looking for that great drag node and edge
example
Hi Tak,
In that example, I've used Nodes=new Array() as a place to store each node,
which is of the form
function Node(x,y,id,label,col){
this.x=x
this.y=y
this.id=id
this.label=label
this.col=col
this.links=new Array()
this.info=label
}
that is, the information about which nodes a given node is connected to is
stored in an array of its own links. I find it easier to store what is called
an incidence matrix rather than an adjacency matrix (as some sort of sparse
matrix) since the graph is being constructed on the fly and we don't know how
big it will be. Each time a pair of nodes is connected, the links array of each
is updated.
In terms of storing the structure, yes, one would have to serialize it by
somehow converting that JavaScript object back to something saveable.
A more fully implemented version of this was done using VML several years ago
http://srufaculty.sru.edu/david.dailey/grapher/ . (earlier versions were
written in hyperTalk, CMUTutor and Java/awt. It has heuristics for coloring and
dominating sets, as well as shortest path algorithms, complements, copying,
pasting, extruding and so forth. It also (running only in IE) takes advantage
of ActiveX to do document.execCommand('SaveAs',false, '.xml') so that files may
be written to (and later retrieved from) local file space -- something web apps
rather need and which HTML5 WG seems reluctant to implement. So in the
meantime, yes one would have to package up the content and ship it somewhere to
a server and then build a file browser on the server so that the local web app
could later retrieve its data.
Hope this helps
David
----- Original Message -----
From: takpoli
To: svg-developers@yahoogroups.com
Sent: Friday, July 18, 2008 10:26 AM
Subject: [svg-developers] Re: Looking for that great drag node and edge
example
Hi David,
Thanks for last and this replies. You have an other cool demo.
I read the code, please correct me if I am wrong, it seems you use
Nodes=new Array()
in Javascript code for the link between the node and the line.
In other word, if the user creates the graph, this information along
with the svg object have to be stored to the server for the user to
reload his design the next day.
I am thinking to use <g .. /> and the hidden text to store the
information. The circle (rect in your demo) should know which line
and which end of the line it is attached. Do you know anybody has
simular experance that can be shared?
Thanks,
Tak
--- In svg-developers@yahoogroups.com, "ddailey" <[EMAIL PROTECTED]> wrote:
>
> Here's another thing that allows the nodes of graphs to be dragged
so that the connections follow:
>
> http://srufaculty.sru.edu/david.dailey/svg/graphs30.svg
>
> You'll want to change mode from "travel" to "normal" , perhaps to
disable the animation.
>
> In a simpler example,
http://srufaculty.sru.edu/david.dailey/svg/graphs18.svg ,
>
> you can build graphs from scratch, with mouse clicks to create
nodes, select and connect them.
>
> The data structure is basically given by an array of objects
constructed thusly:
>
> function Node(x,y,id,label,col){
> this.x=x
> this.y=y
> this.id=id
> this.label=label
> this.col=col
> this.links=new Array()
> this.info=label
> }
> NB=new Node(x,y,nodenum,w, Colors[i%Colors.length])
> Nodes.push(NB)
>
> David
> ----- Original Message -----
> From: takpoli
> To: svg-developers@yahoogroups.com
> Sent: Thursday, July 17, 2008 9:39 PM
> Subject: [svg-developers] Re: Looking for that great drag node
and edge example
>
>
>
> In Hetko's demo, I would like to link x1, y1 of the line by the
id
> of circle1 and x2, y2 by the id of circle2. Is there some extra
> location in the DOM structure to do that?
>
> Both circles and lines (> 100 each) are generated dynamically. I
> would to update x1 and y2 when circle1 is moved.
>
> Thanks,
>
> Tak
>
> --- In svg-developers@yahoogroups.com, "Heiko Niemann" <me@>
> wrote:
> >
> > Hi,
> >
> > probably not the one you are talking about but it does what
you are
> > talking about. :) Besides it's several month old, too.
> >
> > http://www.zuccaralloo.de/devgroup/samples/boundRectangle.svg
> >
> > Regards,
> > Heiko
> >
> > http://www.zuccaralloo.de/devgroup
> >
> >
> >
> > --- In svg-developers@yahoogroups.com, "run2bmi21"
> > <Douglas.R.Aker@> wrote:
> > >
> > >
> > > A few month's back in these postings, I saw reference to an
> excellent
> > > javascript (I think) drag and drop example of two nodes
(squares
> I
> > > think) connected by an edge. When you drag the node, the
> connecting
> > > edge drags with it.
> > >
> > > Anybody remember the URL of that example? I searched the
> postings for
> > > 30 minutes but couldn't find it. This time I'll bookmark it
> > > immediately!
> > >
> > > Thanks,
> > > Doug
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
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