Mercurial > sdl-ios-xcode
annotate docs/html/sdlquitevent.html @ 816:428f688f2ad2
Date: Fri, 13 Feb 2004 17:03:16 +0100
From: Max Horn
Subject: Modifier key fix
The internal modifier state can get out of sync with reality. To
trigger this, do for example this:
1) Launch an SDL app
2) Alt-click on the desktop (this will hide the SDL app).
3) Bring the SDL app back to the front
4) SDL will still think alt is pressed (and as such will treat left
clicks like middle clicks). If you press and release alt, it'll be fine
again.
The attached patch cures this by rechecking the modifier state whenever
we process an event.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 13 Feb 2004 17:57:16 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_QuitEvent</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_UserEvent" | |
| 17 HREF="sdluserevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_keysym" | |
| 20 HREF="sdlkeysym.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
|
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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 | |
| 48 HREF="sdluserevent.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlkeysym.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLQUITEVENT" | |
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74 ></A |
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75 >SDL_QuitEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4621" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_QuitEvent -- Quit requested event</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4624" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type | |
| 95 } SDL_QuitEvent;</PRE | |
| 96 ></DIV | |
| 97 ><DIV | |
| 98 CLASS="REFSECT1" | |
| 99 ><A | |
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100 NAME="AEN4627" |
| 0 | 101 ></A |
| 102 ><H2 | |
| 103 >Structure Data</H2 | |
| 104 ><DIV | |
| 105 CLASS="INFORMALTABLE" | |
| 106 ><A | |
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107 NAME="AEN4629" |
| 0 | 108 ></A |
| 109 ><P | |
| 110 ></P | |
| 111 ><TABLE | |
| 112 BORDER="0" | |
| 113 CLASS="CALSTABLE" | |
| 114 ><TBODY | |
| 115 ><TR | |
| 116 ><TD | |
| 117 ALIGN="LEFT" | |
| 118 VALIGN="TOP" | |
| 119 ><TT | |
| 120 CLASS="STRUCTFIELD" | |
| 121 ><I | |
| 122 >type</I | |
| 123 ></TT | |
| 124 ></TD | |
| 125 ><TD | |
| 126 ALIGN="LEFT" | |
| 127 VALIGN="TOP" | |
| 128 ><TT | |
| 129 CLASS="LITERAL" | |
| 130 >SDL_QUIT</TT | |
| 131 ></TD | |
| 132 ></TR | |
| 133 ></TBODY | |
| 134 ></TABLE | |
| 135 ><P | |
| 136 ></P | |
| 137 ></DIV | |
| 138 ></DIV | |
| 139 ><DIV | |
| 140 CLASS="REFSECT1" | |
| 141 ><A | |
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142 NAME="AEN4637" |
| 0 | 143 ></A |
| 144 ><H2 | |
| 145 >Description</H2 | |
| 146 ><P | |
| 147 ><SPAN | |
| 148 CLASS="STRUCTNAME" | |
| 149 >SDL_QuitEvent</SPAN | |
| 150 > is a member of the <A | |
| 151 HREF="sdlevent.html" | |
| 152 ><SPAN | |
| 153 CLASS="STRUCTNAME" | |
| 154 >SDL_Event</SPAN | |
| 155 ></A | |
| 156 > union and is used whan an event of type <TT | |
| 157 CLASS="LITERAL" | |
| 158 >SDL_QUIT</TT | |
| 159 > is reported.</P | |
| 160 ><P | |
| 161 >As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to close the window. On the other hand, if you do accept a quit event then the application window will be closed, and screen updates will still report success event though the application will no longer be visible.</P | |
| 162 ><DIV | |
| 163 CLASS="NOTE" | |
| 164 ><BLOCKQUOTE | |
| 165 CLASS="NOTE" | |
| 166 ><P | |
| 167 ><B | |
| 168 >Note: </B | |
| 169 >The macro <TT | |
| 170 CLASS="FUNCTION" | |
| 171 >SDL_QuitRequested</TT | |
| 172 > will return non-zero if a quit event is pending</P | |
| 173 ></BLOCKQUOTE | |
| 174 ></DIV | |
| 175 ></DIV | |
| 176 ><DIV | |
| 177 CLASS="REFSECT1" | |
| 178 ><A | |
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parents:
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179 NAME="AEN4648" |
| 0 | 180 ></A |
| 181 ><H2 | |
| 182 >See Also</H2 | |
| 183 ><P | |
| 184 ><A | |
| 185 HREF="sdlevent.html" | |
| 186 ><SPAN | |
| 187 CLASS="STRUCTNAME" | |
| 188 >SDL_Event</SPAN | |
| 189 ></A | |
| 190 >, | |
| 191 <A | |
| 192 HREF="sdlseteventfilter.html" | |
| 193 ><TT | |
| 194 CLASS="FUNCTION" | |
| 195 >SDL_SetEventFilter</TT | |
| 196 ></A | |
| 197 ></P | |
| 198 ></DIV | |
| 199 ><DIV | |
| 200 CLASS="NAVFOOTER" | |
| 201 ><HR | |
| 202 ALIGN="LEFT" | |
| 203 WIDTH="100%"><TABLE | |
|
803
355632dca928
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parents:
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diff
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204 SUMMARY="Footer navigation table" |
| 0 | 205 WIDTH="100%" |
| 206 BORDER="0" | |
| 207 CELLPADDING="0" | |
| 208 CELLSPACING="0" | |
| 209 ><TR | |
| 210 ><TD | |
| 211 WIDTH="33%" | |
| 212 ALIGN="left" | |
| 213 VALIGN="top" | |
| 214 ><A | |
| 215 HREF="sdluserevent.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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216 ACCESSKEY="P" |
| 0 | 217 >Prev</A |
| 218 ></TD | |
| 219 ><TD | |
| 220 WIDTH="34%" | |
| 221 ALIGN="center" | |
| 222 VALIGN="top" | |
| 223 ><A | |
| 224 HREF="index.html" | |
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803
355632dca928
Updated SDL HTML documentation
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parents:
181
diff
changeset
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225 ACCESSKEY="H" |
| 0 | 226 >Home</A |
| 227 ></TD | |
| 228 ><TD | |
| 229 WIDTH="33%" | |
| 230 ALIGN="right" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="sdlkeysym.html" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
234 ACCESSKEY="N" |
| 0 | 235 >Next</A |
| 236 ></TD | |
| 237 ></TR | |
| 238 ><TR | |
| 239 ><TD | |
| 240 WIDTH="33%" | |
| 241 ALIGN="left" | |
| 242 VALIGN="top" | |
| 243 >SDL_UserEvent</TD | |
| 244 ><TD | |
| 245 WIDTH="34%" | |
| 246 ALIGN="center" | |
| 247 VALIGN="top" | |
| 248 ><A | |
| 249 HREF="eventstructures.html" | |
|
803
355632dca928
Updated SDL HTML documentation
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parents:
181
diff
changeset
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250 ACCESSKEY="U" |
| 0 | 251 >Up</A |
| 252 ></TD | |
| 253 ><TD | |
| 254 WIDTH="33%" | |
| 255 ALIGN="right" | |
| 256 VALIGN="top" | |
| 257 >SDL_keysym</TD | |
| 258 ></TR | |
| 259 ></TABLE | |
| 260 ></DIV | |
| 261 ></BODY | |
| 262 ></HTML | |
| 263 > |