4x01 Symbian C++ Reference - Part 1

eZine lover (@eZine)

Published in 

phearless

 · 9 months ago

                                 
                           ................... 
                     ...::: phearless zine #4 :::... 
                   
...............>---[ Symbian C++ Reference - Part 1 ]---<................ 

..........................>---[ by argv ]---<............................ 
                                                argv.cpp[at]gmail[dot]com 

Sadrzaj: 

    [0] Intro/Outro 
    [1] Basics 
    [2] Prefixes 
    [3] Sufixes 
    [4] Classes 
    [5] Types 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 0. Intro/Outro 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

C++ za Symbian nije toliko drukciji po funkcionalnosti, ali se dosta razlikuje 
po sintaksi i nacinu koristenja odredjenih funkcija. Posto je ovo relativno 
veliko podrucje, odlucio sam razbiti ga u nekoliko chaptera (vjerovatno 3). 
Za ovaj broj zinea ubacio sam samo osnove dok ce ostala 2 chaptera doci sa 
brojem 5. 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 1. Basics 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

Prvo slovo neke klase uvijek mora pocinjati sa velikim slovom. npr: 

class TNekaKlasa 

Rijeci koje oznacavaju varijablu ili ime funkcije takodjer pocinju sa velikim  
slovom, dok parametri funkcije pocinju s malim. npr: 

void NekaFunkcija(); 
TInt mojaLokalnaVarijabla; 
CVarijabla* iNekiMember; 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 2. Prefixes 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

neki od prefixa koji se koriste su: 

TInt iTimer; -> i = instance 
void NekaFunkcija(TBool aPrimjerBool, const TDesC& aName); -> a = argument  
enum TImena {EIvo, EIvica, EIvana}; -> E = enumeracija 
const TInt KMaxFilenameLength = 256; -> K = konstantno (const) 
#define KMaxFilenameLength 256 -> #define za const 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 3. Sufixes 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

neki od sufixa koji se koriste su: 

void ConstructL(); -> L oznacava da se funkcija smije prekinuti nakon sto zavrsi. 

CAplikacija* NewLC(); -> C oznacava da funkcija vraca pointer na CleanupStack  
i zatim izlazi. 

TInt IzvrsiLD(TInt aResourceId); -> D oznacava da ce referirani objekt biti  
izbrisan nakon izvrsenja funkcije. 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 4. Classes 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

Klase imaju 4 moguca prefixa, to su: 

C(Class) - ove klase potjecu iz CBase headera (e32base.h) i mogu koristiti  
Stack i StackCleanup metode. 
primjer: LOCAL_C void CNekaKlasa() 

R(Resource) - ove klase sluze za kontrolu svih vanjskih resursa koje vasa  
aplikacija koristi (slike, ikone...) 
primjer: RESOURCE NekiResource 

T(Type) - ove klase koriste 'built-in tipove' i nije im potreban pointer ili  
handle za pristup. 
primjer: LOCAL_C void TDriveInfo()  

M(Mixed) - ove klase mogu sadrzavati sve ostale klase i tako mozda smanjiti  
kolicinu posla, ali ovo je jos experimental i ne preporucujem. 

//////////////////////////////////////////////////////////////////////////// 
--==<[ 5. Types 
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 

Osnovni Tipovi su: 

TIntX i TUintX (X = 8,16,32 bit) (TIntX = SIGNED, TUintX = UNSIGNED) 
TReal32 i TReal64 (TReal32 = float, TReal64 = double) 
TTextX (X = 8,16 bit) za signed integere 
TAny* (TAny* == void*) (void MojaFunkcija(TAny* aPointerNaParametar); 
TBool (TBool == True(1) or False(0)) 

-- 
Greetz 

Blackhat