Re: [Inkscape-user] When to use onclick(evt) and when to use onclick(event)?

25 Apr 2017

      Thanks C R.
I've posted it at
http://troubleshooters.com/codecorn/clickmap/hello1.htm, which is a
working but very rudimentary clickable map.
Each circle has an onclick, onmouseover, and onmouseout event, all
three of which, each of which calls a javascript function in the
<html><head> (via the top. construct, which apparently is used within
the <svg> to reach out to the containing <html>.
Anyway, each of those functions in the events for the circles uses an
argument called "evt". If you change "evt" to "event" it works
identically. But if you change it to almost anything else, the web page
fails, and if you look at it in Chromium's debugging environment, your
clicks produce "ev is not defined" if you'd used "ev" as that argument.
SteveT
On Tue, 25 Apr 2017 09:01:28 +0100
C R <cajhne@...155...> wrote:
...
Can you post your svg?
It seems to me if evt were a reserved word it would fail, not
succeed. :)
Most references I found indicate you can pass anything as an event
storage variable, and i doubt "e" is a reserved word.
If you could post a link to your html+svg file, we can probably
advise better.
-C
On Tue, Apr 25, 2017 at 2:34 AM, Steve Litt
<slitt@...2357...> wrote:
...
Hi all,
Within a <svg> element in my HTML body, I can use onclick(evt), as
exemplified below:
============================================================
<svg width="500px" viewBox="0 15 80 30">
  <circle id=circ1 r="6" cx="10" cy="30" onclick="top.doit(evt)" />
</svg>
============================================================
I can change the "evt" to "event" and it still works,  but if I
change it to anything else, for example "e", it fails. Is evt some
kind of reserved word within SVG?
By the way, if an item in HTML itself (like a paragraph) has an
onclick, you need to remove the "top." and only "event" will work.
I have the rudiments of a clickable map using SVG, CSS and
Javascript, and am starting to build it into something useful.
Thanks,
SteveT
Steve Litt
April 2017 featured book: Troubleshooting Techniques
     of the Successful Technologist
http://www.troubleshooters.com/techniques

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