set_format_value_func


Description:

public void set_format_value_func (owned ScaleFormatValueFunc? func)

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 digits property.

Parameters:

this

a Scale

func

function that formats the value

destroy_notify

destroy function for user_data

user_data

user data to pass to func