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  Gagues not showing what expected..
Posted by Brian Cuthbertson on Jun-06-2016 20:10
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Hi Peter,

Ad the title states, I am not getting what I expect from this code.

What I expect is the guage to be in the middle.

What I get is what ids shown in the image.


            double value = 100.0;
            var m = new AngularMeter(200, 300, 0xffffff, 0xffffff, 0);
            m.setSearchPath(Server.MapPath("."));
            m.setMeter(25, 150, 150, 135, 45);
            m.setScale2(-100, 200, new string[] { "E", " ", " ", " ", "F" });
            m.setLineWidth(2, 2);
            m.addZone(80, 110, 0x00ff00);
            m.addPointer(value, 0xffff00);
            var wv = new WebChartViewer { Image = m.makeWebImage(Chart.PNG) };
            graphHolder.Controls.Add(wv);


wat do?

brian
guage.png

  Re: Gauge not showing what expected..
Posted by Brian Cuthbertson on Jun-06-2016 21:23
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I should have mentioned, with a scale of -100 to 100, and the value set to 100 I'd expect the gauge to point to the middle.. not where it is in the picture.

  Re: Gauge not showing what expected..
Posted by Peter Kwan on Jun-07-2016 01:48
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Hi Brian,

Sorry, I am not too sure what is your exact requirement.

In your current code, the scale is from -100 to 200, as your code use setScale2(-100, 200, ...). So the "middle" is (-100 + 200) / 2 = 50, and so 100 should be above the middle, which is the case in your meter.

You mentioned "with a scale of -100 to 100, and the value set to 100 I'd expect the gauge to point to the middle". If the scale is from -100 to 100, then the value of 100 should point to the end of the enter (the "F" position), not the middle. The middle between -100 and 100 should be 0.

If you want the 100 position to be at the middle, you can set the scale from -100 to 300. For example:

m.setScale2(-100, 300, new string[] { "E", " ", " ", " ", "F" });

If the above is not what you need, would you mind to clarify the statement "with a scale of -100 to 100, and the value set to 100 I'd expect the gauge to point to the middle"? It is because I think if the scale is -100 to 100, the 100 is at the end of the scale, not the middle.

Regards
Peter Kwan