W3C home > Mailing lists > Public > www-svg@w3.org > April 2009

Re: units other than pixels very unprecise? (how should 'top' width/height larger than screen be handled?)

From: Gavin Kistner <gavin@phrogz.net>
Date: Mon, 20 Apr 2009 22:04:26 -0600
Message-Id: <18CEEDDE-B4BB-43C5-AD43-0D095A72214C@phrogz.net>
To: Ruud Steltenpool <svg@steltenpower.com>
Cc: "www-svg@w3.org" <www-svg@w3.org>
A test case is a great way to convey a problem precisely, as long as  
the recipients can, and are motivated to, run your test. Can you  
summarize the problem you are seeing and what you expected or hoped to  
see, for those of us without ready access to test this? And, what  
platform(s) and user agent(s) you see this problem on?

--
(-, /\ \/ / /\/

On Apr 19, 2009, at 6:11 PM, Ruud Steltenpool <svg@steltenpower.com>  
wrote:

> According to this:
>
> <svg xmlns="http://www.w3.org/2000/svg" onclick="calculate()">
> <script type="text/ecmascript"> <![CDATA[
>    function calculate(evt) {
>        bb=document.getElementById("rect").getBBox();
>
>        rwi=1;
>        rwp=bb.width;
>        swp=screen.width;
>        swi=swp/rwp*rwi;
>
>        rhi=1;
>        rhp=bb.height;
>        shp=screen.height;
>        shi=shp/rhp*rhi;
>
>        sdi=Math.sqrt(swi*swi+shi*shi);
>
>        blah="rect\n";
>        blah+=rwi+"x"+rhi+"(inch,given)\n";
>        blah+=rwp+"x"+rhp+"(pixels,queried)\n";
>        blah+="\n";
>
>        blah+="screen\n";
>        blah+=swp+"x"+shp+"(pixels,queried)\n";
>        blah+=swi+"x"+shi+"(inch,calculated)\n";
>        blah+="diagonal= "+sdi+" inch\n";
>        blah+="(ERROR: in my case a strong exaggeration)";
>        blah+="\n";
>        blah+="\n";
>
>
>        blah+="Without this ERROR i could of course calculate the  
> viewBox i need in combination with width='100%' and height='100%' in  
> order to scale any drawing to the prefered physical size\n";
>        blah+="\n";
>
>        blah+="This ERROR of course also means it's very unprecise/ 
> unwise to use units (other than pixels) in general";
>
>        alert(blah);
>    }
>  ]]> </script>
> <rect id="rect" width="1in" height="1in"/>
> </svg>
>
Received on Tuesday, 21 April 2009 04:05:41 GMT

This archive was generated by hypermail 2.3.1 : Friday, 8 March 2013 15:54:42 GMT