Here's what I found when I tried this.
I placed the following in a wyswiwyg tiddler within Bram Chen's
HTMLArea using the html view (not the standard editor view):
<embed src="HTMLArea/plugins/AsciiSvg/d.svg" script="border = 0
initPicture(-10,10)
axes()
stroke = 'red'
p = []
with (Math)
for (t = 0; t < 10.01; t += 0.05)
p[p.length] = [t*cos(PI*t), t*sin(PI*t)]
path(p)" />
It's code from an example of a drawing at the ASCIISVG home page at
http://www1.chapman.edu/~jipsen/svg/asciisvg.html but modified as
follows:
1) When I save the original raw "embed statement, the delimeiters for
the script are changed from single quotes to double quotes and this
throws errors when the script encounters the "red" attribute. So I
changed the script delimiters to double quotes and the delimiters
within the script itself to single quotes
2) The original example begins <embed width="117" height="117"
src="d.svg" ... The HTMLArea editor strips out the width and height
elements - I don't know why. But I think they're being remembered
because the SVG output seems to be affected by them nonetheless as
mentioned below
3) The original example refers to "d.svg" in the wrong location for
Bram's HTMLArea and I corrected it.
The result was that I did indeed see the drawing when I switched out
of raw html mode and back to normal viewing within the editor.
Another oddity was that I'd initially used a version of the embed
statement that omitted the height and width statements and the drawing
had been truncated on the right. When I replaced the width and height
statements, the drawing appeared correctly even though html view in
the editor no longer showed the width and height statements.
However, the drawing only appears as an empty SVG area when I view the
tiddler oustide the editor. Hence I'm only halfway to the desired
solution.
If I place the same embed statement in a non-wysiwyg tiddler (so it's
never been touched by HTMLArea) I just see the embed statement when I
view the tiddler.
Overall I'm therefore left wondering:
1) How can I get the drawing displayed when viewing the tiddler? Is
there perhaps an equivalent place in my TW where I need to get the
right code to execute at view time instead of edit time?
2) Can I stop HTMLArea swapping the script delimeters to single
quotes?
3) can I stop HTMLArea removing thew width and height statements?
4) How would I invoke the same drawing from a non-wysiwyg tiddler.
(Maybe the answer to 1 above will help here).
I'll let you know if I learn more but if anyone has any insights that
might help further, please by all means let me know.
Thanks
Kevin
On Nov 2, 8:57 pm, kilucas <[EMAIL PROTECTED]> wrote:
> David's made the following suggestion:
>
> This is untested so no guarantees, but you can try this: In
> AsvgHA.js
> (or ASCIIsvgHA.js) drawPics, replace
>
> var sscr = picture.getAttribute("sscr");
> if ((sscr != null) && (sscr != "")) {
> try {
> if (isIE) {
> parseShortScript(sscr);
> //names the SVG so it can identify
> itself onclick
> picture.window.setname(picture.id);
> }
> } catch (e) {}
> }
>
> with
>
> var sscr = picture.getAttribute("sscr");
> var src = picture.getAttribute("script");
>
> if ((sscr != null) && (sscr != "")) {
> try {
> if (isIE) {
> parseShortScript(sscr);
> //names the SVG so it can identify
> itself onclick
> picture.window.setname(picture.id);
> }
> } catch (e) {}
> } else if ((src!=null) && (src != "")) {
> try {
> if (isIE) {
> with (Math) eval(src);
> picture.window.setname(picture.id);
> }
> } catch(err) {alert(err+"\n"+src)}
> }
>
> Kevin
>
> On Oct 28, 12:18 pm, kilucas <[EMAIL PROTECTED]> wrote:
>
>
>
> > I posted some informatiuon about this in the ASCIIMath Google group
> > where David Lippman and Peter Jipsen, who were both instrumental in
> > producing the mathematical version of HTMLArea are posting. David got
> > back to me to suggest there's a bug inASCIIsvgwhich is causing the
> > problem.
>
> > I've copied my posting and his reply here (my apologies if that breaks
> > any form of etiquette) and will see if I can rectify the problem
> > myself although I'm not that handy with code and this may defeat me.
> > Maybe someone better skilled might know how to fix this without too
> > much effort.
>
> > Bram: Presumably it'd be good to incorporate any solution we find into
> > your package.
>
> > Here's my posting, then David's reply:
>
> > Kevin
> > I'm using ASCIIMathML andASCIIsvgwith HTMLArea in TiddlyWiki. The
> > implementation I have
> > fromhttp://sourceforge.net/project/showfiles.php?group_id=150646&package_...
> > invokes a window (called the Equation Grapher Control Panel) in which
> > I can specifiy graph parameters to create SVG graphs. But theASCIIsvg
> > home page suggests I might also be able to form my own drawings by
> > embedding some material in web pages.
>
> > By pasting examples similar those on theASCIIsvghome page into the
> > raw html viewer of HTMLArea available via a toolbar button I've got
> > my
> > browser to recognise that an svg object is to be rendered (the right
> > mouse menu is appropriate to SVG) but myASCIIsvgcode isn't
> > generating a drawing.
>
> > My latest simple example is the following which amounts to an entire
> > Tiddlywiki tiddler:
>
> > <p>Start text</p><embed src="HTMLArea\Plugins\AsciiSvg\d.svg"
> > script="initPicture(-2,2,-2,2);axes();line([-2,-2],[2,2]);" /><p /
>
> > ><p>End text</p>
>
> > (The instructions on theASCIIsvghome page say that the script
> > delimiters should be single quotes but the HTMLArea editor converts
> > them to double quotes even when I manually change them back).
>
> > When I display the resultant page I get an empty SVG area surrounded
> > by my start and end text and sometimes get a dialog box saying only
> > "undefined" though it doesn't make clear what is undefined.
>
> > When I compare the html here with the html generated by the Equation
> > Grapher Control Panel wiindow the latter uses an sscr attribute to
> > specific the graph I think but I can't find out what the sscr element
> > is. And in any case it doesn't seem to be part of theASCIIsvg
> > vocabulary as far as I can tell.
>
> > I tried the same material in an ASciencePad tiddler but had no
> > further
> > success there.
>
> > So does anyone here know if I should be able to specify my own
> > drawings in the TiddlyWiki/HTMLAea environment and if so how I'd
> > speciify them so that they draw completely please?
>
> > David:
> > The sscr attribute is a "short script" that is the abbreviated format
> > used by the Equation Grapher Control Panel.
>
> > When I wrote theASCIIsvgplugin for HTMLArea, there were two files
> > in
> > addition toASCIIsvg.js: AsvgHA.js (or ASCIIsvgHA.js) and
> > ASCIIsvgAddon.js. The former is used in the editor window itself;
> > the
> > latter is intended to be included in the output.
>
> > Looking at it, it appears that I stripped the "script" attribute
> > handling out of AsvgHA.js (in the drawPics function). Not sure
> > exactly why. The handling is still in ASCIIsvgAddon.js, so it should
> > be possible to add it in to AsvgHA.js.
>
> > ----------------------------
>
> > On 27 Oct, 18:17, kilucas <[EMAIL PROTECTED]> wrote:
>
> > > I've made limited progress. My browser now recognmises that I'm trying
> > > to display an SVG picture but doesn't actually draw the picture I
> > > intend. Here's what I've done and what I'm thinking of trying next.
>
> > > I've inserted the <embed statement while editing the html (an option
> > > provided by the HTMLArea editor). This seems to recognise the "<" sign
> > > much better than when I placed the <embed statement in the wysiwyg
> > > editor itself. (A look at the genereated html for the whole TW when
> > > the tiddler was on display showed "embed .. preceded by "lt" when I
> > > pasted the <embed statement into the wysiwyg part of the editor rather
> > > than "<" which was generated by theASCIISvggrapher.
>
> > > Once I set HTMLArea to show me the html and pasted the <embed
> > > statement there, I could no longer see that part of the statement when
> > > viewing the tiddler instead of seeing all the code I'd pasted in.
> > > Guessing this meant that the embed statement was being acted upon
> > > instead of merely redisplayed as code, this seemed to be a little
> > > progress.
>
> > > I now also see an area in the displayed tiddler which my browser
> > > clearly thinks is an SVG area because a right click in IE6 offers SVG
> > > menu options.
>
> > > The recomended code at theASCIISvgweb site includes a reference to a
> > > file called "d.svg". In HTMLArea this is located at "HTMLArea\plugins
> > > \AsciiSvg\d.svg" so I edited the HTML to reflect this longer relative
> > > path. This made no practical difference that I can see so I'm simply
> > > guessing it's correct.
>
> > > I had a further problem with the raw html editor within HTMLArea. It
> > > seems to change the script delimiters from the single quotes that I
> > > pasted in to double quotes. As I was initially trialling anASCIISvg
> > > script that contained parameters demarcated by double quotes I guessed
> > > there'd be confusion about nested double quotes and therefore trialled
> > > a script that contained no other double quotes to avoid confusion.
> > > Currently I'm trying a tiddler for which HTMLArea shows the the
> > > following html:
>
> > > <p>Start text</p><embed src="HTMLArea\Plugins\AsciiSvg\d.svg"
> > > script="initPicture(-2,2,-2,2);axes();line([-2,-2],[2,2]);" /><p /
>
> > > ><p>End text</p>.
>
> > > Although an SVG area is displayed by my browser now, I'm still not
> > > seeing the desired drawing.
>
> > > 1) I've tried placing width and height paramenetsr after the "embed"
> > > word but these get stripped out by the editor - I'm not sure why.
>
> > > 2) I don't see the line drawn as requested by the code or even the
> > > axes that should appear. I do get a dialog box merely saying
> > > "undefined" a few times before I clear it. I don't yet know how to fix
> > > this and don't yet know if this is clue to the failed drawing or
> > > whether it relates to something else.
>
> > > I've compared the generated html for the whole TW to the code
> > > generated by theASCIISvggraphing window available inside HTMLArea
> > > and that contains an ssrc statement that I've not seen in anyASCIIsvg
> > > coding. I'm currently guessing that the graphing window is therefore
> > > generating SVG code rather thanASCIISvgcode and that my problem lies
> > > in gettingASCIISVGcode recognised.
>
> > > I'll explore how to insert SVG code in my html to see if that draws
> > > lines correctly. If SVG code works butASCIISvgdoes not, this might
> > > support the view that my problem lies inASCIIsvgcode recognition.
> > > (I'd also be puzzled whyASCIISvgis present with this version of
> > > HTMLArea since, to my limited understanding, it'd suggest that
> > >ASCIISvgisn't actually used anywhere in the grapher).
>
> > > But if anyone already spots why my graph still won't draw even though
> > > I'm now at least invoking the SVG viewer, I'd be delighted to hear
> > > from you as I admit that I feel I'm groping in the dark a little at
> > > present.
>
> > > Thanks
>
> > > Kevin
>
> > > On Oct 19, 1:13 pm, kilucas <[EMAIL PROTECTED]> wrote:
>
> > > > Interesting. I tried the <embed etc material in Firefox too but still
> > > > only saw the script. That's almost a relief anyway because my Firefox
> > > > objectes to pasting into a tiddler because of security problem that I
> > > > haven't been able to fix yet, but pasting example SVG code is much
> > > > faster and less error prone than retyping it by hand.
>
> > > > I tried placing d.svg adjacent to the TW and even an extra copy of the
> > > > originalASCIIsvg.js there although the header markup wouldn't have
> > > > known about the latter and neither made any difference.
>
> > > > It's such a shame because the drawing facilities are so useful as well
> > > > as the graphing facilities. And, presuming that the graphing
> > > > facilities invoke the drawing facilities anyway, I feel drawing by
> > > > providing theASCIIsvgcode must somehow be possible.- Hide quoted text -
>
> - Show quoted text -...
>
> read more »
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