Mercurial > sdl-ios-xcode
annotate docs/html/sdlunlockaudio.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> |
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date | Sun, 20 Apr 2003 05:41:16 +0000 |
parents | e5bc29de3f0a |
children | 355632dca928 |
rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_UnlockAudio</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="Audio" | |
14 HREF="audio.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_LockAudio" | |
17 HREF="sdllockaudio.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_CloseAudio" | |
20 HREF="sdlcloseaudio.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 | |
47 HREF="sdllockaudio.html" | |
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="sdlcloseaudio.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="SDLUNLOCKAUDIO" | |
71 >SDL_UnlockAudio</A | |
72 ></H1 | |
73 ><DIV | |
74 CLASS="REFNAMEDIV" | |
75 ><A | |
181
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76 NAME="AEN6768" |
0 | 77 ></A |
78 ><H2 | |
79 >Name</H2 | |
80 >SDL_UnlockAudio -- Unlock the callback function</DIV | |
81 ><DIV | |
82 CLASS="REFSYNOPSISDIV" | |
83 ><A | |
181
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84 NAME="AEN6771" |
0 | 85 ></A |
86 ><H2 | |
87 >Synopsis</H2 | |
88 ><DIV | |
89 CLASS="FUNCSYNOPSIS" | |
90 ><A | |
181
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91 NAME="AEN6772" |
0 | 92 ></A |
93 ><P | |
94 ></P | |
95 ><PRE | |
96 CLASS="FUNCSYNOPSISINFO" | |
97 >#include "SDL.h"</PRE | |
98 ><P | |
99 ><CODE | |
100 ><CODE | |
101 CLASS="FUNCDEF" | |
102 >void <B | |
103 CLASS="FSFUNC" | |
104 >SDL_UnlockAudio</B | |
105 ></CODE | |
106 >(void);</CODE | |
107 ></P | |
108 ><P | |
109 ></P | |
110 ></DIV | |
111 ></DIV | |
112 ><DIV | |
113 CLASS="REFSECT1" | |
114 ><A | |
181
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115 NAME="AEN6778" |
0 | 116 ></A |
117 ><H2 | |
118 >Description</H2 | |
119 ><P | |
120 >Unlocks a previous <A | |
121 HREF="sdllockaudio.html" | |
122 ><TT | |
123 CLASS="FUNCTION" | |
124 >SDL_LockAudio</TT | |
125 ></A | |
126 > call.</P | |
127 ></DIV | |
128 ><DIV | |
129 CLASS="REFSECT1" | |
130 ><A | |
181
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131 NAME="AEN6783" |
0 | 132 ></A |
133 ><H2 | |
134 >See Also</H2 | |
135 ><P | |
136 ><A | |
137 HREF="sdlopenaudio.html" | |
138 ><TT | |
139 CLASS="FUNCTION" | |
140 >SDL_OpenAudio</TT | |
141 ></A | |
142 ></P | |
143 ></DIV | |
144 ><DIV | |
145 CLASS="NAVFOOTER" | |
146 ><HR | |
147 ALIGN="LEFT" | |
148 WIDTH="100%"><TABLE | |
149 WIDTH="100%" | |
150 BORDER="0" | |
151 CELLPADDING="0" | |
152 CELLSPACING="0" | |
153 ><TR | |
154 ><TD | |
155 WIDTH="33%" | |
156 ALIGN="left" | |
157 VALIGN="top" | |
158 ><A | |
159 HREF="sdllockaudio.html" | |
160 >Prev</A | |
161 ></TD | |
162 ><TD | |
163 WIDTH="34%" | |
164 ALIGN="center" | |
165 VALIGN="top" | |
166 ><A | |
167 HREF="index.html" | |
168 >Home</A | |
169 ></TD | |
170 ><TD | |
171 WIDTH="33%" | |
172 ALIGN="right" | |
173 VALIGN="top" | |
174 ><A | |
175 HREF="sdlcloseaudio.html" | |
176 >Next</A | |
177 ></TD | |
178 ></TR | |
179 ><TR | |
180 ><TD | |
181 WIDTH="33%" | |
182 ALIGN="left" | |
183 VALIGN="top" | |
184 >SDL_LockAudio</TD | |
185 ><TD | |
186 WIDTH="34%" | |
187 ALIGN="center" | |
188 VALIGN="top" | |
189 ><A | |
190 HREF="audio.html" | |
191 >Up</A | |
192 ></TD | |
193 ><TD | |
194 WIDTH="33%" | |
195 ALIGN="right" | |
196 VALIGN="top" | |
197 >SDL_CloseAudio</TD | |
198 ></TR | |
199 ></TABLE | |
200 ></DIV | |
201 ></BODY | |
202 ></HTML | |
203 > |