Dial Interaction (XForms (Forms Library) - Version 1.2 (Rev. 4) A Graphical User Interface Toolkit for X)

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#### 17.3.3 Dial Interaction

By default, the dial value is returned to the application when the user releases the mouse. It is possible to change this behavior using the following routine

    void fl_set_object_return(FL_OBJECT *obj, unsigned int when);

where `when` can be one of the following

`FL_RETURN_NONE`

  Never report or invoke callback.

`FL_RETURN_END_CHANGED`

  Return or invoke callback at end (mouse release) and only if the dial value is changed. This is the default setting.

`FL_RETURN_CHANGED`

  Return or invoke callback whenever the dial value is changed.

`FL_RETURN_END`

  Return or invoke callback at the end regardless if the dial value is changed or not.

`FL_RETURN_ALWAYS`

  Return or invoke callback when value has changed or mouse button has been released.