void gtk_scale_add_mark ( GtkScale* scale, double value, GtkPositionType position, const char* markup )
Adds a mark at
A mark is indicated visually by drawing a tick mark next to the scale, and GTK makes it easy for the user to position the scale exactly at the marks value.
markup is not
NULL, text is shown next to the tick mark.
To remove marks from a scale, use
The value at which the mark is placed, must be between the lower and upper limits of the scales’ adjustment.
Where to draw the mark. For a horizontal scale,
GTK_POS_LEFTare drawn above the scale, anything else below. For a vertical scale,
GTK_POS_TOPare drawn to the left of the scale, anything else to the right.
Text to be shown at the mark, using Pango markup.
The argument can be
The data is owned by the caller of the method. The value is a NUL terminated UTF-8 string.