19 Jun
2011
19 Jun
'11
4:06 p.m.
On Sun, Jun 19, 2011 at 8:58 PM, Ammar Yasir <ammaryasir.88(a)gmail.com> wrote:
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On Sat, Jun 18, 2011 at 4:42 PM, Marc Delisle <marc(a)infomarc.info> wrote:
So like in table browse mode we can generate the plot for 500/250 rows. Then
if user wants we can replot with the next 500/250. Although I agree it will
only complicate the plot and its hard to make sense from the plot.
Or we can also ask the limit as input but I think the user might find it
annoying or unnecessary.
for the 'Display chart' feature I thought of using a zoom feature like
this: http://www.highcharts.com/demo/dynamic-master-detail
What if we make 2 sql queries to find out the min and max value of the
'x-axis', then select like 100-200 values that are equally distributed
over the x-axis and display those?
Hope that was understandable.
Le 2011-06-17 18:16, Ammar Yasir a écrit :
> On Fri, Jun 17, 2011 at 11:49 AM, Marc Delisle <marc(a)infomarc.info>
> wrote:
>
>> Ammar,
>> it works well so far!
>>
>> Suggestions:
>>
>> - As the default data label, use the display field if it exists (from
>> libraries/relation.lib.php, PMA_getDisplayField() )
>>
>> - For the title, instead of "Scatter Plot", give some indications
(how
>> to zoom, how to click, etc) or give a link to get such indications
>>
>> - Is it possible to enlarge the size of the working zone? ideally, to
>> drag it by one of its corners?
>>
I used the jquery-ui plugin and implemented this.
:) I'll try and look into it.
Your solution of fetching just the needed columns will help, but we'll
need another safeguard for big tables. I'm thinking of a configurable
maximum of rows to fetch. Think of it, showing millions (or even
thousands) of dots won't make any sense.
- You seem to prefetch the whole table and
I'm concerned about response
time and memory issues for big tables (try it with the payment table
and
no data restriction). When hovering over a dot, maybe fetch the rows
one
by one with Ajax? Or use Ajax if there are more than a certain number
of
rows.
I was also very much concerned about this. This happens even with the
'Display chart' functionality in the browse tab. I pre-fetch the table
for
making the initial plot and store the data row for each point. One
solution
can be like: Now I'm generating query like 'Select * from table' which
I'll
change to 'Select x,y from table' and then when hovering or clicking
over
the plot, I'll fetch the data row.
>
> - Clicking on a point shows the whole row; is it possible to show a
> pencil icon which would permit to bring another panel to edit the row?
>
> - Still thinking about a panning mechanism?
>
> - Any possibility of this feature for multi-tables?
--
Marc Delisle
http://infomarc.info
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