Digxel< NUM, FMT > Class Template Reference

#include "lib/time/digxel.hpp"

Description

template<typename NUM, class FMT = digxel::Formatter<NUM>>
class lib::time::Digxel< NUM, FMT >

A number element for building structured numeric displays.

The purpose is to represent parts of a numeric format, like e.g. the sexagesimal "digits" of a timecode display. A Digxel

• is customised by template parameters to a specific number format
• requires that any given number must not overflow the format buffer
• can receive new numbers by assignment
• stores and these given value numerically
• will then format these numbers and cache the formatted representation
• can store and invoke a mutation functor to pre-process values on setting

Note

comparisons are assumed to be not performance relevant

Parameters

NUM	numeric type to be used for the value
FMT	a formatter and buffer holder type

See also

digxel::Formatter default printf based formatter

lib::time::TCode

Digxel_test

Definition at line 226 of file digxel.hpp.

Public Member Functions
template<typename FUN , class THIS >
void	installMutator (FUN mutate, THIS &self)
	install an external functor to be applied on any new digxel value. More...
size_t	maxlen () const
	operator NUM () const
	operator string () const
Digxel &	operator++ ()
NUM	operator++ (int)
Digxel &	operator+= (NUM inc)
Digxel &	operator-- ()
NUM	operator-- (int)
Digxel &	operator-= (NUM dec)
bool	operator< (Digxel const &o) const
void	operator= (NUM n)
bool	operator== (Digxel const &o) const
void	setValueRaw (NUM newVal)
digxel::CBuf	show () const

Private Types
typedef Digxel< NUM, FMT >	_Digxel
typedef function< void(NUM)>	_Mutator

Private Attributes
FMT	buffer_
_Mutator	mutator
	Functor for setting a new digxel value.
NUM	value_

Member Function Documentation

installMutator()

void installMutator ( FUN  mutate, THIS &  self  )

inline

install an external functor to be applied on any new digxel value.

This allows individual instances to limit the possible digxel values, or to update an compound value (e.g. a time comprised of hour, minute and second digxel elements). The installed functor needs to accept a "this" pointer and actually perform any desired state change as sideeffect. The default is to accept any value as-is.

Warning

using a mutator creates significant overhead; measurements indicate a factor of 4

See also

Digxel_test

Definition at line 252 of file digxel.hpp.

Referenced by lib::time::anonymous_namespace{timecode.cpp}::setupComponentNormalisation().

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Inheritance diagram for Digxel< NUM, FMT >:

Collaboration diagram for Digxel< NUM, FMT >:

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The documentation for this class was generated from the following file:

• digxel.hpp