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I am trying to develop a small tool and I am stuck on a very simple problem.

This how I want it to look:

enter image description here

I have

minValue = steps = 100.000
valueRange = 500.000.000 - 100.000
newPercent = where the circle is right now (0-100%)
newValue = minValue + (valueRange * newPercent / 100.0);

The range is very big, and it is very hard to set the right value at the beginning, but when the value is above 200 million, I don't care about 100000. So I wont to make it exponential; e.g., $x=y^2$

That what I was thinking.


I want to make the first steps with 100.000 and them more and more.

Maybe like this?


Maybe I am totally wrong.

Any suggestions?

share|improve this question
Take a look at logarithmic slider, try to implement your ideas and if you get stuck, we will help you for sure :) –  Kuba Feb 11 at 22:08
p.s. pressed Alt makes Slider less sensitive. –  Kuba Feb 11 at 22:23
On OS X pressing Shift+Options (I guess Shift+Alt on other systems) makes the slider move even slower. I can almost control the 5th digit after the decimal point in a range of (0, 1) like this. –  Szabolcs Feb 12 at 0:53

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