TChart: Autosizing Left and Right Axis - What's the trick?

[Zitt]

All,
Appreciate the feedback received in my previous GUI advice thread. I went with some of the advice; using TA3nalogGauge as the basis for the start of my GUI. I tried modifying the behavior of TA3nalogGauge to include a min and max needle; but I couldn't get it to work right.

I've added a Lazarus TChart to the GUI so I can give a chart representation of the current being utilized during the various "phases" of the RGB sequence. There are 5 configurable LED "strings" on this product; each can be configured with their own color/flashing sequence.

The Chart currently needs to display two Axis... one on the Left which shows the individual currents and one on the right which displays the total current for the entire device. I've tried in vain using the following article:
http://wiki.freepascal.org/TAChart_Tutorial:_Dual_y_axis,_Legend

but I can't seem to get the autoscale to work properly. As you can see in the picture attached; the right axis will not auto-scale correctly. I pretty sure the values never exceed 1600mA... so there is no reason for the autoscale to factor up to 32000mA.

What I need/what is for the Left and Right Axis to scale independently so both "waveforms" display at full scale.

Thoughts?

Code: Pascal  [Select][+][-]

1.   object CurrentChart: TChart
2.     AnchorSideLeft.Control = CurrentGauge
3.     AnchorSideLeft.Side = asrBottom
4.     AnchorSideTop.Control = CurrentGauge
5.     AnchorSideRight.Control = FlashGB
6.     AnchorSideRight.Side = asrBottom
7.     AnchorSideBottom.Control = Owner
8.     AnchorSideBottom.Side = asrBottom
9.     Left = 209
10.     Height = 231
11.     Top = 496
12.     Width = 367
13.     AxisList = <    
14.       item
15.         Grid.Color = clBtnShadow
16.         TickColor = clBtnFace
17.         Marks.LabelBrush.Style = bsClear
18.         Minors = <>
19.         Range.Max = 1
20.         Range.UseMin = True
21.         Title.LabelFont.Orientation = 900
22.         Title.LabelBrush.Style = bsClear
23.         Transformations = LeftAxisTransformations
24.       end    
25.       item
26.         Grid.Color = clBtnShadow
27.         TickColor = clBtnFace
28.         Alignment = calBottom
29.         Marks.LabelBrush.Style = bsClear
30.         Minors = <>
31.         Range.Max = 40
32.         Range.UseMax = True
33.         Range.UseMin = True
34.         Title.LabelBrush.Style = bsClear
35.       end    
36.       item
37.         Alignment = calRight
38.         Group = 1
39.         Marks.LabelBrush.Style = bsClear
40.         Minors = <>
41.         Range.Max = 1
42.         Range.UseMin = True
43.         Title.LabelBrush.Style = bsClear
44.         Transformations = RightAxisTransformations
45.       end>
46.     BackColor = clBlack
47.     Foot.Brush.Color = clBtnFace
48.     Foot.Font.Color = clBlue
49.     Frame.Color = clBtnFace
50.     Legend.Alignment = laBottomCenter
51.     Legend.ColumnCount = 5
52.     Legend.Transparency = 50
53.     Legend.Visible = True
54.     Title.Brush.Color = clBtnFace
55.     Title.Font.Color = clBlue
56.     Title.Text.Strings = (
57.       'TAChart'
58.     )        
59.   object LeftAxisTransformations: TChartAxisTransformations
60.     left = 248
61.     top = 512
62.     object LeftAxisTransform: TAutoScaleAxisTransform
63.     end
64.   end
65.   object RightAxisTransformations: TChartAxisTransformations
66.     left = 512
67.     top = 512
68.     object RightAxisTransform: TAutoScaleAxisTransform
69.     end
70.   end      
71.  

[wp]

You do not show the series in the lfm, but I speculate that you did not assign the series' AxisIndexY to the index of the left/right axis.

[Zitt]

I'm about 80% sure I did assign both axis.
I'll look again when I get home from the day job.

Actually; I just noticed there was a TAChart subforum under "graphics"...
http://forum.lazarus.freepascal.org/index.php/board,55.0.html
Can a Mod move this topic there?

[wp]

I'm about 80% sure I did assign both axis.

If you did you should extract the chart part of your project with some dummy data into a simple compilable demo which you can upload here via "Attachments and other options". Put .pas, .lfm, .lpr and .lpi files into a common zip, no compiler generated files (.exe, .ppu, .compiled etc) please.

[Zitt]

Indeed; I am setting axis at runtime (as is all the data).

A demo project is a little more complicated give the fact that all of the data is read runtime.

Let me ponder this.

[wp]

Please search the forum. I am rather sure that I already posted a runtime dual-axis example.