class Fl_Free

Class Hierarchy

Include Files


Emulation of the Forms "free" widget. This emulation allows the free demo to run, and appears to be useful for porting programs written in Forms which use the free widget or make subclasses of the Forms widgets.

There are five types of free, which determine when the handle function is called:

An FL_INPUT_FREE accepts FL_FOCUS events. A FL_CONTINUOUS_FREE sets a timeout callback 100 times a second and provides a FL_STEP event, this has obvious detrimental effects on machine performance. FL_ALL_FREE does both. FL_SLEEPING_FREE are deactivated.


Fl_Free(uchar type, int, int, int, int, const char*l, FL_HANDLEPTR hdl)

The constructor takes both the type and the handle function. The handle function should be declared as follows: This function is called from the the handle() method in response to most events, and is called by the draw() method. The event argument contains the event type:

virtual Fl_Free::~Fl_Free()

The destructor will call the handle function with the event FL_FREE_MEM.