[Kstars-devel] "Altitude vs. Time" tool implemented with QCustomPlot library, a

[Jasem Mutlaq]

Great progress Raphael!

Please update your git and then run 'git diff' and send me a patch as I
would like to test your work locally here as well in case there are any
comments to be made now.

Regards,
Jasem


On Tue, Jan 12, 2016 at 11:33 PM, Raphael Cojocaru <
raphael.cojocaru at yahoo.com> wrote:

> Hi.
> I am currently working on "Improve Altitude vs. Time tool" task and here
> is a brief overview on my work. I implemented the Altitude vs. Time tool
> with QCustomPlot library and until now I have solved the following:
> - Set up the graph window
> - Set up the axis labels, Date time format and tick step ( the time's
> units need to be discrete like: 01:00, 02:00 )
> - Set up the Top X Axis ( "Local Sidereal Time" )
> - Set up the interaction set: Zoom/Pan are now ready for use
> - Set up the margins, for a nice view ( e.g. in the right side, the graph
> window was not closed before)
> - Set up the Zoom/Pan activated for the Top X Axis
> - Because I need a kind of limitation regarding the Zoom/Pan for the
> current curve, I have used:
> 1. 2 variables for minimum and maximum altitude from the current graph (
> for every curve that we insert into our graph, the minAlt and maxAlt
> variables are updated )
> 2. these variables are extremely useful to limit the Y axis to our graph
> most insignificant curve regarding the minimum and maximum value
> 3. 2 new slots: onXRangeChanged and onYRangeChanged, to update and limit
> the axis
> - With all of these, I have connected the slots to the axis, with one
> remark: the xAxis and xAxis2 are connected through the same slot, to behave
> as same
> - Rewrite the code for making existing curves with thin and red pencil
> - A short algorithm for setting up the tick step for xAxis and xAxis2
> depending on the Zoom level ( like: a half an hour after some zoom level:
> 1:30, 2:00; a quarter hour after another zoom level and so on. this is
> necessary because there wouldn't be anything to see if the initial tick
> step would be maintained while continuously zooming )
> - Rewrite the method for removing all curves from the plot ( cleaning the
> graph )
>
> For now I have a small bug to fix: after some scrolls ( Zoom In ), the Top
> X axis and Bottom X axis values become the same. ( the delay for the Top X
> Axis disappears ). So I'm trying to solve it. I will post a new patch with
> all these achievements immediately after I solve this bug.
> Next, I will search and implement a method to show curves' name in the
> chart, and I also have to compute and indicate the Rise/Transit/Set points
> on the curve. Regarding the gradient, I will leave it at the end.
>
> Raphael
>
>
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>
>


-- 
Best Regards,
Jasem Mutlaq
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