Mercurial > sdl-ios-xcode
annotate docs/html/sdlsyswmevent.html @ 615:7ec821f3cbd0
Date: Thu, 17 Apr 2003 23:27:34 -0400
From: Darrell Walisser
Subject: Yet another OS X cursor bug
The synopsis:
1. Call SDL_ShowCursor(0);
2. Call SDL_SetVideoMode();
3. Call SDL_GetEvent();
3. Call SDL_ShowCursor(1);
The result: Sometimes the cursor doesn't come back! Ack! Oddly enough,
it does come back when mousing over the dock or clicking in the menu
bar. But that's besides the point.
The reason why this is happening is a flaw in the handling of
activation/deactivation events. The short explanation is that the
HideCursor() and ShowCursor() calls must be balanced, but if the cursor
was initially hidden, HideCursor() was called again on the activate
event - so now the next ShowCursor() fails (as does the next, and the
next, for some reason).
So, here's the patch. All it does is keep track of the
HideCursor()/ShowCursor() calls so that they will always be balanced.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 20 Apr 2003 05:41:16 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_SysWMEvent</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 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" | |
|
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16 TITLE="SDL_ExposeEvent" |
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17 HREF="sdlexposeevent.html"><LINK |
| 0 | 18 REL="NEXT" |
| 19 TITLE="SDL_UserEvent" | |
| 20 HREF="sdluserevent.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 | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
|
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47 HREF="sdlexposeevent.html" |
| 0 | 48 >Prev</A |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdluserevent.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLSYSWMEVENT" | |
| 71 >SDL_SysWMEvent</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
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76 NAME="AEN4154" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_SysWMEvent -- Platform-dependent window manager event.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSECT1" | |
| 83 ><A | |
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84 NAME="AEN4157" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Description</H2 | |
| 88 ><P | |
| 89 >The system window manager event contains a pointer to system-specific | |
| 90 information about unknown window manager events. If you enable this event | |
| 91 using | |
| 92 <A | |
| 93 HREF="sdleventstate.html" | |
| 94 ><TT | |
| 95 CLASS="FUNCTION" | |
| 96 >SDL_EventState()</TT | |
| 97 ></A | |
| 98 >, | |
| 99 it will be generated whenever unhandled events are received from the window | |
| 100 manager. This can be used, for example, to implement cut-and-paste in your | |
| 101 application. | |
| 102 | |
| 103 <PRE | |
| 104 CLASS="PROGRAMLISTING" | |
| 105 >typedef struct { | |
| 106 Uint8 type; /* Always SDL_SysWM */ | |
| 107 } SDL_SysWMEvent;</PRE | |
| 108 > | |
| 109 | |
| 110 If you want to obtain system-specific information about the window manager, | |
| 111 you can fill the version member of a <SPAN | |
| 112 CLASS="STRUCTNAME" | |
| 113 >SDL_SysWMinfo</SPAN | |
| 114 > | |
| 115 structure (details can be found in <TT | |
| 116 CLASS="FILENAME" | |
| 117 >SDL_syswm.h</TT | |
| 118 >, which must be included) using the <TT | |
| 119 CLASS="FUNCTION" | |
| 120 >SDL_VERSION()</TT | |
| 121 > macro found in | |
| 122 <TT | |
| 123 CLASS="FILENAME" | |
| 124 >SDL_version.h</TT | |
| 125 >, and pass it to the | |
| 126 function: | |
| 127 <DIV | |
| 128 CLASS="FUNCSYNOPSIS" | |
| 129 ><A | |
|
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130 NAME="AEN4167" |
| 0 | 131 ></A |
| 132 ><P | |
| 133 ></P | |
| 134 ><P | |
| 135 ><CODE | |
| 136 ><CODE | |
| 137 CLASS="FUNCDEF" | |
| 138 >int <B | |
| 139 CLASS="FSFUNC" | |
| 140 >SDL_GetWMInfo</B | |
| 141 ></CODE | |
| 142 >(SDL_SysWMinfo *info);</CODE | |
| 143 ></P | |
| 144 ><P | |
| 145 ></P | |
| 146 ></DIV | |
| 147 ></P | |
| 148 ></DIV | |
| 149 ><DIV | |
| 150 CLASS="REFSECT1" | |
| 151 ><A | |
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152 NAME="AEN4172" |
| 0 | 153 ></A |
| 154 ><H2 | |
| 155 >See Also</H2 | |
| 156 ><P | |
| 157 ><A | |
| 158 HREF="sdleventstate.html" | |
| 159 ><TT | |
| 160 CLASS="FUNCTION" | |
| 161 >SDL_EventState</TT | |
| 162 ></A | |
| 163 ></P | |
| 164 ></DIV | |
| 165 ><DIV | |
| 166 CLASS="NAVFOOTER" | |
| 167 ><HR | |
| 168 ALIGN="LEFT" | |
| 169 WIDTH="100%"><TABLE | |
| 170 WIDTH="100%" | |
| 171 BORDER="0" | |
| 172 CELLPADDING="0" | |
| 173 CELLSPACING="0" | |
| 174 ><TR | |
| 175 ><TD | |
| 176 WIDTH="33%" | |
| 177 ALIGN="left" | |
| 178 VALIGN="top" | |
| 179 ><A | |
|
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180 HREF="sdlexposeevent.html" |
| 0 | 181 >Prev</A |
| 182 ></TD | |
| 183 ><TD | |
| 184 WIDTH="34%" | |
| 185 ALIGN="center" | |
| 186 VALIGN="top" | |
| 187 ><A | |
| 188 HREF="index.html" | |
| 189 >Home</A | |
| 190 ></TD | |
| 191 ><TD | |
| 192 WIDTH="33%" | |
| 193 ALIGN="right" | |
| 194 VALIGN="top" | |
| 195 ><A | |
| 196 HREF="sdluserevent.html" | |
| 197 >Next</A | |
| 198 ></TD | |
| 199 ></TR | |
| 200 ><TR | |
| 201 ><TD | |
| 202 WIDTH="33%" | |
| 203 ALIGN="left" | |
| 204 VALIGN="top" | |
|
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205 >SDL_ExposeEvent</TD |
| 0 | 206 ><TD |
| 207 WIDTH="34%" | |
| 208 ALIGN="center" | |
| 209 VALIGN="top" | |
| 210 ><A | |
| 211 HREF="eventstructures.html" | |
| 212 >Up</A | |
| 213 ></TD | |
| 214 ><TD | |
| 215 WIDTH="33%" | |
| 216 ALIGN="right" | |
| 217 VALIGN="top" | |
| 218 >SDL_UserEvent</TD | |
| 219 ></TR | |
| 220 ></TABLE | |
| 221 ></DIV | |
| 222 ></BODY | |
| 223 ></HTML | |
| 224 > |