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Article #167: Fl_Signal 0.1

Created at 11:30 May 22, 2003 by rokan

New callback and signal/slot library for FLTK

Features:

• Type-safety of callbacks (signals, slots)
• Both functions and class member methods with any number parameters can be used (0-5 are implemented)
• Multiple callbacks can be attached to a widget or a node
• Callbacks can be dynamically attached to / removed from a widget or a node
• Each argument of callback function can be determined either by a value (parameter/value binding), pointer to a variable or as a return value of a sub-call
• Return values can be either stored in a variable (defined by a pointer), pushed to a sub-call, sent to a node or used by attached slots as an argument
• Special callback classes - Signals and Slots can emit/accept values of any type and propagate the callback event
• It is an add-on library, you can use both standard fltk callbacks and this library in your program

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