Mercurial > sdl-ios-xcode
annotate docs/html/guideeventexamples.html @ 934:af585d6efec8
Date: Thu, 17 Jun 2004 11:38:51 -0700 (PDT)
From: Eric Wing <ewing2121@yahoo.com>
Subject: New OS X patch (was Re: [SDL] Bug with inverted mouse coordinates in
I have a new patch for OS X I would like to submit.
First, it appears no further action has been taken on
my fix from Apple on the OpenGL windowed mode mouse
inversion problem. The fix would reunify the code, and
no longer require case checking for which version of
the OS you are running. This is probably a good fix
because the behavior with the old code could change
again with future versions of the OS, so those fixes
are included in this new patch.
But in addition, when I was at Apple, I asked them
about the ability to distinguish between the modifier
keys on the left and right sides of the keyboard (e.g.
Left Shift, Right Shift, Left/Right Alt, L/R Cmd, L/R
Ctrl). They told me that starting with Panther, the OS
began supporting this feature. This has always been a
source of annoyance for me when bringing a program
that comes from Windows or Linux to OS X when the
keybindings happened to need distinguishable left-side
and right-side keys. So the rest of the patch I am
submitting contains new code to support this feature
on Panther (and presumably later versions of the OS).
So after removing the OS version checks for the mouse
inversion problem, I reused the OS version checks to
activate the Left/Right detection of modifier keys. If
you are running Panther (or above), the new code will
attempt to distinguish between sides. For the older
OS's, the code path reverts to the original code.
I've tested with Panther on a G4 Cube, G5 dual
processor, and Powerbook Rev C. The Cube and G5
keyboards demonstrated the ability to distinguish
between sides. The Powerbook seems to only have
left-side keys, but the patch was still able to handle
it by producing the same results as before the patch.
I also wanted to test a non-Apple keyboard.
Unfortunately, I don't have any PC USB keyboards.
However, I was able to borrow a Sun Microsystems USB
keyboard, so I tried that out on the G5, and I got the
correct behavior for left and right sides. I'm
expecting that if it worked with a Sun keyboard, most
other keyboards should work with no problems.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 20 Aug 2004 22:35:23 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Event Examples</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Examples" | |
| 14 HREF="guideexamples.html"><LINK | |
| 15 REL="PREVIOUS" | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
16 TITLE="Examples" |
|
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
17 HREF="guideexamples.html"><LINK |
| 0 | 18 REL="NEXT" |
| 19 TITLE="Audio Examples" | |
| 20 HREF="guideaudioexamples.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="SECT1" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
48 HREF="guideexamples.html" |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 >Chapter 4. Examples</TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="guideaudioexamples.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><DIV | |
| 72 CLASS="SECT1" | |
| 73 ><H1 | |
| 74 CLASS="SECT1" | |
| 75 ><A | |
| 76 NAME="GUIDEEVENTEXAMPLES" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
77 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
78 >Event Examples</H1 |
| 0 | 79 ><P |
| 80 ></P | |
| 81 ><DIV | |
| 82 CLASS="SECT2" | |
| 83 ><H2 | |
| 84 CLASS="SECT2" | |
| 85 ><A | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
86 NAME="AEN375" |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
87 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
88 >Filtering and Handling Events</H2 |
| 0 | 89 ><P |
| 90 ><PRE | |
| 91 CLASS="PROGRAMLISTING" | |
| 92 >#include <stdio.h> | |
| 93 #include <stdlib.h> | |
| 94 | |
| 95 #include "SDL.h" | |
| 96 | |
| 97 /* This function may run in a separate event thread */ | |
| 98 int FilterEvents(const SDL_Event *event) { | |
| 99 static int boycott = 1; | |
| 100 | |
| 101 /* This quit event signals the closing of the window */ | |
| 102 if ( (event->type == SDL_QUIT) && boycott ) { | |
| 103 printf("Quit event filtered out -- try again.\n"); | |
| 104 boycott = 0; | |
| 105 return(0); | |
| 106 } | |
| 107 if ( event->type == SDL_MOUSEMOTION ) { | |
| 108 printf("Mouse moved to (%d,%d)\n", | |
| 109 event->motion.x, event->motion.y); | |
| 110 return(0); /* Drop it, we've handled it */ | |
| 111 } | |
| 112 return(1); | |
| 113 } | |
| 114 | |
| 115 int main(int argc, char *argv[]) | |
| 116 { | |
| 117 SDL_Event event; | |
| 118 | |
| 119 /* Initialize the SDL library (starts the event loop) */ | |
| 120 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 121 fprintf(stderr, | |
| 122 "Couldn't initialize SDL: %s\n", SDL_GetError()); | |
| 123 exit(1); | |
| 124 } | |
| 125 | |
| 126 /* Clean up on exit, exit on window close and interrupt */ | |
| 127 atexit(SDL_Quit); | |
| 128 | |
| 129 /* Ignore key events */ | |
| 130 SDL_EventState(SDL_KEYDOWN, SDL_IGNORE); | |
| 131 SDL_EventState(SDL_KEYUP, SDL_IGNORE); | |
| 132 | |
| 133 /* Filter quit and mouse motion events */ | |
| 134 SDL_SetEventFilter(FilterEvents); | |
| 135 | |
| 136 /* The mouse isn't much use unless we have a display for reference */ | |
| 137 if ( SDL_SetVideoMode(640, 480, 8, 0) == NULL ) { | |
| 138 fprintf(stderr, "Couldn't set 640x480x8 video mode: %s\n", | |
| 139 SDL_GetError()); | |
| 140 exit(1); | |
| 141 } | |
| 142 | |
| 143 /* Loop waiting for ESC+Mouse_Button */ | |
| 144 while ( SDL_WaitEvent(&event) >= 0 ) { | |
| 145 switch (event.type) { | |
| 146 case SDL_ACTIVEEVENT: { | |
| 147 if ( event.active.state & SDL_APPACTIVE ) { | |
| 148 if ( event.active.gain ) { | |
| 149 printf("App activated\n"); | |
| 150 } else { | |
| 151 printf("App iconified\n"); | |
| 152 } | |
| 153 } | |
| 154 } | |
| 155 break; | |
| 156 | |
| 157 case SDL_MOUSEBUTTONDOWN: { | |
| 158 Uint8 *keys; | |
| 159 | |
| 160 keys = SDL_GetKeyState(NULL); | |
| 161 if ( keys[SDLK_ESCAPE] == SDL_PRESSED ) { | |
| 162 printf("Bye bye...\n"); | |
| 163 exit(0); | |
| 164 } | |
| 165 printf("Mouse button pressed\n"); | |
| 166 } | |
| 167 break; | |
| 168 | |
| 169 case SDL_QUIT: { | |
| 170 printf("Quit requested, quitting.\n"); | |
| 171 exit(0); | |
| 172 } | |
| 173 break; | |
| 174 } | |
| 175 } | |
| 176 /* This should never happen */ | |
| 177 printf("SDL_WaitEvent error: %s\n", SDL_GetError()); | |
| 178 exit(1); | |
| 179 }</PRE | |
| 180 ></P | |
| 181 ></DIV | |
| 182 ></DIV | |
| 183 ><DIV | |
| 184 CLASS="NAVFOOTER" | |
| 185 ><HR | |
| 186 ALIGN="LEFT" | |
| 187 WIDTH="100%"><TABLE | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
188 SUMMARY="Footer navigation table" |
| 0 | 189 WIDTH="100%" |
| 190 BORDER="0" | |
| 191 CELLPADDING="0" | |
| 192 CELLSPACING="0" | |
| 193 ><TR | |
| 194 ><TD | |
| 195 WIDTH="33%" | |
| 196 ALIGN="left" | |
| 197 VALIGN="top" | |
| 198 ><A | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
199 HREF="guideexamples.html" |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
200 ACCESSKEY="P" |
| 0 | 201 >Prev</A |
| 202 ></TD | |
| 203 ><TD | |
| 204 WIDTH="34%" | |
| 205 ALIGN="center" | |
| 206 VALIGN="top" | |
| 207 ><A | |
| 208 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
209 ACCESSKEY="H" |
| 0 | 210 >Home</A |
| 211 ></TD | |
| 212 ><TD | |
| 213 WIDTH="33%" | |
| 214 ALIGN="right" | |
| 215 VALIGN="top" | |
| 216 ><A | |
| 217 HREF="guideaudioexamples.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
218 ACCESSKEY="N" |
| 0 | 219 >Next</A |
| 220 ></TD | |
| 221 ></TR | |
| 222 ><TR | |
| 223 ><TD | |
| 224 WIDTH="33%" | |
| 225 ALIGN="left" | |
| 226 VALIGN="top" | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
227 >Examples</TD |
| 0 | 228 ><TD |
| 229 WIDTH="34%" | |
| 230 ALIGN="center" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="guideexamples.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
234 ACCESSKEY="U" |
| 0 | 235 >Up</A |
| 236 ></TD | |
| 237 ><TD | |
| 238 WIDTH="33%" | |
| 239 ALIGN="right" | |
| 240 VALIGN="top" | |
| 241 >Audio Examples</TD | |
| 242 ></TR | |
| 243 ></TABLE | |
| 244 ></DIV | |
| 245 ></BODY | |
| 246 ></HTML | |
| 247 > |