annotate docs/man3/SDL_keysym.3 @ 1200:8f418dce02b2

Date: Sun, 11 Dec 2005 20:37:04 +0100 From: Olivier Boudeville <olivier.boudeville@online.fr> To: "A list for developers using the SDL library. \(includes SDL-announce\)" <sdl@libsdl.org> Subject: [SDL] NetBSD build patch Hi everybody, apparently the SDL-1.2.9 source archive could not compile "as is" on NetBSD 2.0_STABLE due to a pthread detection issue in the configure script. I attached a small patch that can be applied to configure.in so that SDL can be directly (i.e. without the NetBSD package manager) configured and built successfully on NetBSD (at least on the one I tried !). Hope this helps, Olivier.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 12 Dec 2005 09:22:36 +0000
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children 546f7c1eb755
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1 .TH "SDL_keysym" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
0
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2 .SH "NAME"
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3 SDL_keysym\- Keysym structure
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4 .SH "STRUCTURE DEFINITION"
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5 .PP
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6 .nf
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7 \f(CWtypedef struct{
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8 Uint8 scancode;
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9 SDLKey sym;
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10 SDLMod mod;
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11 Uint16 unicode;
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12 } SDL_keysym;\fR
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13 .fi
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14 .PP
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15 .SH "STRUCTURE DATA"
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16 .TP 20
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17 \fBscancode\fR
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18 Hardware specific scancode
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19 .TP 20
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20 \fBsym\fR
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21 SDL virtual keysym
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22 .TP 20
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23 \fBmod\fR
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24 Current key modifiers
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25 .TP 20
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26 \fBunicode\fR
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27 Translated character
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28 .SH "DESCRIPTION"
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29 .PP
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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\&.
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31 .PP
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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:
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33 .PP
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34 .nf
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35 \f(CW\&.
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36 \&.
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37 while(SDL_PollEvent(&event)){
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38 switch(event\&.type){
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39 case SDL_KEYDOWN:
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40 if(event\&.key\&.keysym\&.sym==SDLK_LEFT)
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41 move_left();
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42 break;
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43 \&.
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44 \&.
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45 \&.
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46 }
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47 }
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48 \&.
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49 \&.\fR
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50 .fi
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51 .PP
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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:
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53 .PP
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54 .nf
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55 \f(CWchar ch;
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56 if ( (keysym\&.unicode & 0xFF80) == 0 ) {
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57 ch = keysym\&.unicode & 0x7F;
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58 }
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59 else {
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60 printf("An International Character\&.
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61 ");
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62 }\fR
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63 .fi
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64 .PP
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65 UNICODE translation does have a slight overhead so don\&'t enable it unless its needed\&.
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66 .SH "SEE ALSO"
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67 .PP
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68 \fI\fBSDLKey\fR\fR
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69 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00