doc/todo/progressbar_plugin.mdwn



I would like to add next plugin to Ikiwiki. It's progressbar or simply progress.
I'm not sure what plugin name better is, probably that shorter ;) I know that
DokuWiki has similar plugin,
so I think it can be useful also for Ikiwiki users.
Here is proposition of the plugin syntax:
\[[!progress done=50]]

Of course, done argument is integer from 0 to 100.
A here is its HTML result:
<div class="progress">
  <div class="progress-done" style="width: 50%">50%</div>
</div>

Note: I was trying with <span> tags too, but that tag is inline, so I can't
set width property for it.

In the poll plugin, I ended up using a <hr> for the progress-like
thing. One reason I did so is because it actually works in text-mode
browsers (w3m, lynx), that do not support css or colorized
divs. Since the hr is an element they display, just setting its width can
make a basic progress-type display. The style then makes it display
better in more capable browsers.
The other advantage to that approach is that the htmlscrubber lets
through the class and width fields, that are all that are needed for
it to work. No need to work around htmlscrubber.
So I suggest adapting this to use similar html. --[[Joey]]


I just had a brief play with this.  It seems there are some trade-offs involved.
The width attribute of an <hr> tag is deprecated, but that's not the big one.
I can't see how to place text next to an <hr> tag.  I note that in the
[[plugins/poll]] plugin there is text above and below the 'graph line', but none
on the same line as the graph.  I prefer the way the current code renders,
with the percentage complete appearing as text inside the graph.
So, if we use hr we get:

Graph line on text / non-css browsers
No percentage complete text on the same line as the graph line
Deprecated HTML

If we use div we get:

Need to clean up after HTMLScrubber (which is not hard - already implemented)
Get the percentage written as text on text / non-css browsers
Get the percentage on the same line as the graph in css browsers

I'm strongly in favour of having the percentage text label on the graph, and on
text based browsers I think having the text label is enough -- the lack of the line
in that case doesn't bother me.
So, given the choice between the two suggested techniques, I'd take the second and
stay with div... unless you know how to get text next to (or within) an <hr> tag. -- [[Will]]


Default CSS styles for the plugin can be like below:
div.progress {
        border: 1px solid #ddd;
        /* border: 2px solid #ddd; */
        width: 200px;
        background: #fff;
        padding: 2px;
        /* padding: 0px; */
        border: 2px solid #aaa;
        background: #eee;
}
div.progress-done {
        height: 14px;
        background: #ff6600;
        font-size: 12px;
        text-align: center;
        vertical-align: middle;
}

You can use alternative, commented CSS code for div.progress if you dislike
padding around done strip.
Any comments? --[[Paweł|ptecza]]

Please make sure to always set a foreground color if a background color is
set, and use '!important' so the foreground color can be overridden. (CSS
best practices) --[[Joey]]


Below is the CSS I've been using -- [[Will]]


div.progress {
	margin-top: 1ex;
	margin-bottom: 1ex;
	border: 1px solid #888;
	width: 400px;
	background: #eee;
	color: black !important;
	padding: 1px;
}
div.progress-done {
	background: #ea6 !important;
	color: black !important;
	text-align: center;
	padding: 1px;
}


This looks like a nice idea.  If I could add one further suggestion: Allow your
ratio to be a pair of pagespecs.  Then you could have something like:

\[[!progress totalpages="bugs/* and backlink(milestoneB)" donepages="bugs/* and backlink(milestoneB) and !link(bugs/done)"]]


to have a progress bar marking how many bugs were compete for a
particular milestone.  -- [[Will]]


Thanks a lot for your comment, Will! It seems very interesting for me.
I need to think more about improving that plugin. --[[Paweł|ptecza]]


Attached is a [[patch]] (well, source) for this.  You also need to add the proposed CSS above to style.css.
At the moment this plugin interacts poorly with the [[plugins/htmlscrubber]] plugin.
HTMLScrubber plugin removes the style attribute from the progress-done div tag, and so it defaults
to a width of 100%. -- [[Will]]


Thank you for the code! I know how to fix that problem, because I had
the same issue while writing [[todo/color_plugin]] :) --[[Paweł|ptecza]]


Ahh - good idea.  Patch updated to work with HTMLScrubber. --[[Will]]


I like it, but I think that Joey should take a look at that patch too :)
--[[Paweł|ptecza]]


Reviewed, looks excellent, added. [[done]] --[[Joey]]


Thanks a lot for you and Will! :) [[Paweł|ptecza]]