Keys handling

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Detailed Description

To assign a callback to a key event, there is the need to create a new class inheriting from LCDCallback.

The operator() should then be overriden to do actions. It will be called when the key event occurs.

To define only a single function, there are some useful macros (see below).

Then the callback is associated to the event with the method LCDClient::assignKey()

Classes
class	LCDCallback
	Main class to create new callback for key events. More...
Defines
#define	LCD_CALLBACK_FUNCTION_BEGIN(fname)
#define	LCD_CALLBACK_FUNCTION_END(fname)
Typedefs
typedef char	KeyEvent

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Define Documentation

#define LCD_CALLBACK_FUNCTION_BEGIN (  fname   )

Value: class LCDClass_fname : public LCDCallback \ { \ public: \ void operator()(KeyEvent lcdKey) A macro that can be used when only a function is needed and not a real class. Use it with the name of the pseudo function you want to create and then you can define your function code (between braces) Examples: client.cpp. Definition at line 30 of file LCDCallback.h.

#define LCD_CALLBACK_FUNCTION_END (  fname   )

Value: }; \ LCDClass_fname fname; A macro that can be used when only a function is needed and not a real class. It has to be used after the function code and match the name that was used for LCD_CALLBACK_FUNCTION_BEGIN Examples: client.cpp. Definition at line 42 of file LCDCallback.h.

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Typedef Documentation

typedef char KeyEvent

The type used to define a key event. Definition at line 51 of file LCDCallback.h.

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