<!-- ##### SECTION Title ##### -->GtkGammaCurve<!-- ##### SECTION Short_Description ##### -->a subclass of #GtkCurve for editing gamma curves.<!-- ##### SECTION Long_Description ##### --><note><para> This widget is considered too specialized/little-used for GTK+, and will in the future be moved to some other package.  If your application needs this widget, feel free to use it, as the widget does work and is useful in some applications; it's just not of general interest. However, we are not accepting new features for the widget, and it will eventually move out of the GTK+ distribution.</para></note><para>The #GtkGammaCurve widget is a variant of #GtkCurve specifically forediting gamma curves, which are used in graphics applications such as theGimp.</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 displays5 buttons, 3 of which change between the 3 curve modes (spline, linear andfree), and the other 2 set the curve to a particular gamma value, or reset itto a straight line.</para><!-- ##### SECTION See_Also ##### --><para></para><!-- ##### SECTION Stability_Level ##### --><!-- ##### STRUCT GtkGammaCurve ##### --><para>The #GtkGammaCurve struct contains private data only, andshould be accessed using the functions below.</para><!-- ##### FUNCTION gtk_gamma_curve_new ##### --><para>Creates a new #GtkGammaCurve.</para>@Returns: a new #GtkGammaCurve.