Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_keysym.3 @ 2303:d87417504c75
First pass implementation of new SDL scancode concept, as discussed with
Christian Walther. Currently only implemented on Mac OS X for sanity
checking purposes.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 05 Feb 2008 07:19:23 +0000 |
| parents | 546f7c1eb755 |
| children | 1238da4a7112 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_keysym" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
|
2283
546f7c1eb755
Merged revision 3472 from SDL 1.2, fixing bug #493
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
3 SDL_keysym \- Keysym structure |
| 0 | 4 .SH "STRUCTURE DEFINITION" |
| 5 .PP | |
| 6 .nf | |
| 7 \f(CWtypedef struct{ | |
| 8 Uint8 scancode; | |
| 9 SDLKey sym; | |
| 10 SDLMod mod; | |
| 11 Uint16 unicode; | |
| 12 } SDL_keysym;\fR | |
| 13 .fi | |
| 14 .PP | |
| 15 .SH "STRUCTURE DATA" | |
| 16 .TP 20 | |
| 17 \fBscancode\fR | |
| 18 Hardware specific scancode | |
| 19 .TP 20 | |
| 20 \fBsym\fR | |
| 21 SDL virtual keysym | |
| 22 .TP 20 | |
| 23 \fBmod\fR | |
| 24 Current key modifiers | |
| 25 .TP 20 | |
| 26 \fBunicode\fR | |
| 27 Translated character | |
| 28 .SH "DESCRIPTION" | |
| 29 .PP | |
| 30 The \fBSDL_keysym\fR structure is used by reporting key presses and releases since it is a part of the \fI\fBSDL_KeyboardEvent\fR\fR\&. | |
| 31 .PP | |
| 32 The \fBscancode\fR field should generally be left alone, it is the hardware dependent scancode returned by the keyboard\&. The \fBsym\fR field is extremely useful\&. It is the SDL-defined value of the key (see \fISDL Key Syms\fR\&. This field is very useful when you are checking for certain key presses, like so: | |
| 33 .PP | |
| 34 .nf | |
| 35 \f(CW\&. | |
| 36 \&. | |
| 37 while(SDL_PollEvent(&event)){ | |
| 38 switch(event\&.type){ | |
| 39 case SDL_KEYDOWN: | |
| 40 if(event\&.key\&.keysym\&.sym==SDLK_LEFT) | |
| 41 move_left(); | |
| 42 break; | |
| 43 \&. | |
| 44 \&. | |
| 45 \&. | |
| 46 } | |
| 47 } | |
| 48 \&. | |
| 49 \&.\fR | |
| 50 .fi | |
| 51 .PP | |
| 52 \fBmod\fR stores the current state of the keyboard modifiers as explained in \fI\fBSDL_GetModState\fP\fR\&. The \fBunicode\fR is only used when UNICODE translation is enabled with \fI\fBSDL_EnableUNICODE\fP\fR\&. If \fBunicode\fR 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: | |
| 53 .PP | |
| 54 .nf | |
| 55 \f(CWchar ch; | |
| 56 if ( (keysym\&.unicode & 0xFF80) == 0 ) { | |
| 57 ch = keysym\&.unicode & 0x7F; | |
| 58 } | |
| 59 else { | |
| 60 printf("An International Character\&. | |
| 61 "); | |
| 62 }\fR | |
| 63 .fi | |
| 64 .PP | |
| 65 UNICODE translation does have a slight overhead so don\&'t enable it unless its needed\&. | |
| 66 .SH "SEE ALSO" | |
| 67 .PP | |
| 68 \fI\fBSDLKey\fR\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
69 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00 |