Editing setCtlGamma - FilterMeisterWiki

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= setCtlGamma =

== Syntax ==
{{int setCtlGamma(int num, int gamma)}}

== Arguments ==
:'''num'''
::The index number of the user control you want to change
:'''gamma'''
::A value between 1 and 1000. ''Default = 100''

== Return ==
1 if the function completed correctly, 0 if the control is not a STANDARD or SCROLLBAR control, -1 if the given control number is not a valid control.

== Description ==
Changes how the minimum and maximum values of a ((STANDARD)) or ((SCROLLBAR)) control are spread out across the slider control.  Changing the gamma value is useful if you want the user to have more precision at one end of the slider values - for example, a blur where the user needs precision over small blur radius values between 1 - 2 pixels, but the difference between very large radius values doesn't matter so much.  The default gamma value is 100, where the control value changes linearly across the entire slider.

== Example ==
<code>
%fml
ctl[3]: CHECKBOX, Text="Higher Gamma"
ctl[4]: STANDARD, Text="Control", gamma=50, divisor=10

OnCtl(n): {

// If Checkbox value changed
  if (n == 3) {
    if (ctl(3) == true) {
      // Change slowly at start
      // quickly at end
      setCtlGamma(4, 500);
    }
    else {
      // Change quickly at start
      // slowly at end
      setCtlGamma(4, 50);
    }
    return true;
  }
  return false;
}
</code>

== See Also ==
((getCtlDivisor))

Summary of change:
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