Gtk.Scale.Set_Format_Value_Func_User_Data

Description

Destroy

procedure Destroy (Data : in out User_Data_Type)

Parameters

Data

Gtk_Scale_Format_Value_Func

type Gtk_Scale_Format_Value_Func is access function
  (Scale     : not null access Gtk.Scale.Gtk_Scale_Record'Class;
   Value     : Gdouble;
   User_Data : User_Data_Type) return UTF8_String;

Function that formats the value of a scale. See [methodGtk.Scale.set_format_value_func].

Parameters

Scale

The GtkScale

Value

The numeric value to format

User_Data

user data

Return Value

A newly allocated string describing a textual representation of the given numerical value.

Set_Format_Value_Func

procedure Set_Format_Value_Func
   (Self      : not null access Gtk.Scale.Gtk_Scale_Record'Class;
    Func      : Gtk_Scale_Format_Value_Func;
    User_Data : User_Data_Type)

Func allows you to change how the scale value is displayed. The given function will return an allocated string representing Value. That string will then be used to display the scale's value. If NULL is passed as Func, the value will be displayed on its own, rounded according to the value of the [propertyGtk.Scale:digits] property.

Parameters

Self

Func

function that formats the value

User_Data

user data to pass to Func

User_Data_Type

type User_Data_Type (<>) is private;