Doughnut, half-doughnut & gauge charts
lazarus / 55-TAChart

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JD · 2019-12-08 15:58

Hi there everyone,

I want to know if it is possible to create dougnnut, half-doughnut and
radial gauge charts like in the attachments using TAChart or any other
tool in Lazarus. If it is can someone please show me an example?

Thanks a million,

JD

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PaulRowntree · 2019-12-08 17:14

Have you seen the 'Industrial' package?  It is not longer installed
with Lazarus, but it is available here
https://sourceforge.net/p/lazarus-
ccr/svn/HEAD/tree/components/industrialstuff/

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wp · 2019-12-08 17:21

There has been some progress in the TPieSeries of TAChart in Lazarus
trunk.
Donut style after setting InnerRadiusPercentStartAngle --> angle at
which the first pie beginsAngleRange --> angle range between first and
last pie (360: full circle, 180: half circle, etc.)Improved 3D style
- DepthBrightnessDelta --> makes 3D-edges of the pies darker (or
brighter)
- Orientation: normal = as before, horizontal = pies lying flat on
horizontal ground, vertical = pies standing like wheel
- ViewAngle --> displacement of viewpoint from pie planeHave a look at
the demo in folder (lazarus)/components/tachart/demo/radial.

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JD · 2019-12-08 23:34

Thanks a lot for your responses.

@PaulRowntree
I had forgotten about the Industrial package, I'll give it a look

@wp
I seem to have a different (older?) version of TAChart. My own Radial
demo looks like the attached screenshot. Where can I find your
version?


JD

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wp · 2019-12-08 23:58

Quote from: JD on December 09, 2019, 12:34:12 amWhere can I find your
version?
As I said: Laz trunk; since these are all new features they did not
make it into Laz 2.0.6. The easiest way to get trunk is via
FPCUpDeluxe
(https://github.com/LongDirtyAnimAlf/fpcupdeluxe/releases).

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JD · 2019-12-09 09:18

Quote from: wp on December 09, 2019, 12:58:28 amQuote from: JD on
December 09, 2019, 12:34:12 amWhere can I find your version?
As I said: Laz trunk; since these are all new features they did not
make it into Laz 2.0.6. The easiest way to get trunk is via
FPCUpDeluxe
(https://github.com/LongDirtyAnimAlf/fpcupdeluxe/releases).

Pardon me. I overlooked that. I'll give Lazarus trunk a look. Many
thanks. 

JD