here is my new problem, i have created a graph for my data, i am reasonably happy with the result for the data, but i would like to fix some labels and the legend, here is the code i have to date
the main things i want to fix are the legend text is correct, but the colour boxes do not match the colours used in the graph, and i would like to put a label or similar on the yaxes, i guess i could use a label control over the drawing area, but figure there should be someway to do that within the graph

any help would be appreciated

First you need to note that the Chart command has a comment of "This component is not stable yet". I agree that the 'Labels' command seems to do nothing, in fact the syntax 'help' says it is 'Read only'!

I could not get your code to run as it was missing bits, but I took what I could and made effort to get it running and came up with the attached.

but the colour boxes do not match the colours used in the graph

I don't quite understand what the problem is here as it seems to work OK for me.

 i guess i could use a label control over the drawing area, but figure there should be someway to do that within the graph

It would be nice but I can't find out how to do this. You might try creating a new Class and add the Labels or hack the Gambas source code and see if you can understand how the Labels are supposed to work.

I expect you have looked at the Chart Example I put on the Gambas Farm.

From what I can work out from your code you seem to have worked out how to use this.

If you could upload a working program including a sample data file that might help.

First you need to note that the Chart command has a comment of "This component is not stable yet"

that was about 5 years ago, it looks like the programmer has lost interest in this

here is my code, obviously some stuff is nothing to do with the graph, i will probably move the graphing into a separate procedure later, some comments to explain code for other components not required for testing graph, the code is still a bit messy as i keep trying different things, then do not always remember to remove


content of data file

03-06-2018   0.24   4.34   
04-06-2018   0.25   3.13   
05-06-2018   0.63   6.77   
06-06-2018   0.47   6.89   
07-06-2018   0.58   6.13   
08-06-2018   0.60   7.56   
09-06-2018   0.79   4.00   
10-06-2018   0.29   2.85   
11-06-2018   0.20   3.81   
12-06-2018   0.42   6.78   
13-06-2018   0.59   6.40   
14-06-2018   0.28   5.10   
15-06-2018   0.47   3.85   
16-06-2018   0.21   3.82   
17-06-2018   0.22   4.97   
18-06-2018   0.28   12.48   
19-06-2018   0.47   3.17   
   
Total Used   6.99   92.04   
Used Combined   99.03   
   Data Left   400.97   

Data Left   400.97   

on another note, what is maximum delay for timer?

I don't quite understand what the problem is here as it seems to work OK for me.

i am not sure why mine do not match, as i see yours are perfect, i will post a screen shot

(Click to enlarge)

also i note that the screenshot above, the uploads legend looks similar to the data color, on one monitor. on the other screen it looks more like yellow, though the data columns look green, the downloads legend looks purple on the other monitor, data green
your sample matches on both monitors

For Each aln In adt
  If Not aln Then Continue
  Chart[i + 1].Values = [Val(Split(aln)[0]), Val(Split(aln)[1])]
  Inc i
Next

i had not seen this continue before, thanks for that

westconn said

…on another note, what is maximum delay for timer?

Timer Delay is an Integer, so max value is 2147483647ms

Two of us have worked on the colour problem and discovered how to get the correct colours to display. In the 'DrawingArea_Draw' routine you need to add a line, see below: -


The attached program shows two charts, using the same data, but with different colours.
<IMG src="http://cogier.com/gambas/charts.png"> </IMG>
Hope this helps.

 I’ve submitted a Gambas bug see bugtracker 1354

Two of us have worked on the colour problem

thank you both, it works for me too, though why did your sample work correctly without?

also thanks to stevedee

is there any way to have vertical text?

though why did your sample work correctly without?

The reason for this is that I used 'Chart' on its own and did not create a new instance. Your code had: -

My original code didn't. Have a look at ChartExample on the Farm. I did not create a new instance in that code either. You should only need to do that if you need more that one chart.

is there any way to have vertical text?

Not that I am aware of but I found the attached code written by the original author that you might like to pick apart and see if you can improve it or add extra components.

is there any way to have vertical text?

Have a look at the attached.

<IMG src="http://www.cogier.com/gambas/ChartTest.png"> </IMG>