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<!-- ##### SECTION Title ##### -->
GtkGammaCurve
<!-- ##### SECTION Short_Description ##### -->
A subclass of GtkCurve for editing gamma curves
<!-- ##### SECTION Long_Description ##### -->
<para>
The #GtkGammaCurve widget is a variant of #GtkCurve specifically for
editing gamma curves, which are used in graphics applications such as the
Gimp.
</para>
<para>
The #GtkGammaCurve widget shows a curve which the user can edit with the
mouse just like a #GtkCurve widget. On the right of the curve it also displays
5 buttons, 3 of which change between the 3 curve modes (spline, linear and
free), and the other 2 set the curve to a particular gamma value, or reset it
to a straight line.
</para>
<para>
As of GTK+ 2.20, #GtkGammaCurve has been deprecated since it is too specialized.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### STRUCT GtkGammaCurve ##### -->
<para>
The #GtkGammaCurve struct contains private data only, and
should be accessed using the functions below.
</para>
<!-- ##### FUNCTION gtk_gamma_curve_new ##### -->
<para>
Creates a new #GtkGammaCurve.
</para>
@Returns: a new #GtkGammaCurve.
@Deprecated: 2.20: Don't use this widget anymore.
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