diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/libsdl-trunk/docs/html/sdlkeysym.html --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/libsdl-trunk/docs/html/sdlkeysym.html Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,355 @@ +
typedef struct{ + Uint8 scancode; + SDLKey sym; + SDLMod mod; + Uint16 unicode; +} SDL_keysym;
The SDL_keysym structure is used by reporting key presses and releases since it is a part of the SDL_KeyboardEvent.
The scancode field should generally be left alone, it is the hardware dependent scancode returned by the keyboard. The sym field is extremely useful. It is the SDL-defined value of the key (see SDL Key Syms. This field is very useful when you are checking for certain key presses, like so: +
. +. +while(SDL_PollEvent(&event)){ + switch(event.type){ + case SDL_KEYDOWN: + if(event.key.keysym.sym==SDLK_LEFT) + move_left(); + break; + . + . + . + } +} +. +.+mod stores the current state of the keyboard modifiers as explained in SDL_GetModState. The unicode is only used when UNICODE translation is enabled with SDL_EnableUNICODE. If unicode is non-zero then this a the UNICODE character corresponding to the keypress. If the high 9 bits of the character are 0, then this maps to the equivalent ASCII character: +
char ch; +if ( (keysym.unicode & 0xFF80) == 0 ) { + ch = keysym.unicode & 0x7F; +} +else { + printf("An International Character.\n"); +}+UNICODE translation does have a slight overhead so don't enable it unless its needed.