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45 <h1>/holvi/arto/ohjelmointi/ChessClock/chessclock/classes/screenlitkeeper.cpp</h1><a href="screenlitkeeper_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**************************************************************************</span>
46 <a name="l00002"></a>00002 <span class="comment"> ScreenLitKeeper</span>
47 <a name="l00003"></a>00003 <span class="comment"></span>
48 <a name="l00004"></a>00004 <span class="comment"> Copyright (C) 2010 Heli Hyvättinen</span>
49 <a name="l00005"></a>00005 <span class="comment"> </span>
50 <a name="l00006"></a>00006 <span class="comment"> This file is free software: you can redistribute it and/or modify</span>
51 <a name="l00007"></a>00007 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
52 <a name="l00008"></a>00008 <span class="comment"> the Free Software Foundation, either version 3 of the License, or</span>
53 <a name="l00009"></a>00009 <span class="comment"> (at your option) any later version.</span>
54 <a name="l00010"></a>00010 <span class="comment"></span>
55 <a name="l00011"></a>00011 <span class="comment"> This program is distributed in the hope that it will be useful,</span>
56 <a name="l00012"></a>00012 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
57 <a name="l00013"></a>00013 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
58 <a name="l00014"></a>00014 <span class="comment"> GNU General Public License for more details.</span>
59 <a name="l00015"></a>00015 <span class="comment"></span>
60 <a name="l00016"></a>00016 <span class="comment"> You should have received a copy of the GNU General Public License</span>
61 <a name="l00017"></a>00017 <span class="comment"> along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
62 <a name="l00018"></a>00018 <span class="comment"></span>
63 <a name="l00019"></a>00019 <span class="comment">**************************************************************************/</span>
64 <a name="l00020"></a>00020
65 <a name="l00021"></a>00021
66 <a name="l00022"></a>00022
67 <a name="l00023"></a>00023
68 <a name="l00024"></a>00024
69 <a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="screenlitkeeper_8h.html">screenlitkeeper.h</a>"</span>
70 <a name="l00026"></a>00026
71 <a name="l00027"></a><a class="code" href="class_screen_lit_keeper.html#a548195ffb1809ccb8f0277492a40a3fb">00027</a> <a class="code" href="class_screen_lit_keeper.html#a548195ffb1809ccb8f0277492a40a3fb">ScreenLitKeeper::ScreenLitKeeper</a>(QObject *parent) :
72 <a name="l00028"></a>00028 QObject(parent)
73 <a name="l00029"></a>00029 {
74 <a name="l00030"></a>00030 p_screensaver_ = NULL;
75 <a name="l00031"></a>00031 isKeptLit_ = <span class="keyword">false</span>;
76 <a name="l00032"></a>00032 }
77 <a name="l00033"></a>00033
78 <a name="l00034"></a><a class="code" href="class_screen_lit_keeper.html#a41cc193e58d9b4b5c09eda79bbb095c8">00034</a> <span class="keywordtype">void</span> <a class="code" href="class_screen_lit_keeper.html#a41cc193e58d9b4b5c09eda79bbb095c8" title="Sets whether the screen is to be kept lit.">ScreenLitKeeper::keepScreenLit</a>(<span class="keywordtype">bool</span> keepLit)
79 <a name="l00035"></a>00035 {
80 <a name="l00036"></a>00036
81 <a name="l00037"></a>00037 <span class="comment">//If the requested state is the same as the current state do nothing.</span>
82 <a name="l00038"></a>00038 <span class="keywordflow">if</span> (keepLit == isKeptLit_)
83 <a name="l00039"></a>00039 <span class="keywordflow">return</span>;
84 <a name="l00040"></a>00040
85 <a name="l00041"></a>00041
86 <a name="l00042"></a>00042
87 <a name="l00043"></a>00043 <span class="keywordflow">if</span> (keepLit == <span class="keyword">true</span> )
88 <a name="l00044"></a>00044 {
89 <a name="l00045"></a>00045 <span class="comment">//a new screensaver is created, parent is given so that it is automatically destroyed when this object is destroyed</span>
90 <a name="l00046"></a>00046 p_screensaver_ = <span class="keyword">new</span> QSystemScreenSaver(<span class="keyword">this</span>);
91 <a name="l00047"></a>00047 <span class="comment">//screensaver is disabled, which keeps the screen lit on N900</span>
92 <a name="l00048"></a>00048 p_screensaver_->setScreenSaverInhibit();
93 <a name="l00049"></a>00049 isKeptLit_ = <span class="keyword">true</span>;
94 <a name="l00050"></a>00050
95 <a name="l00051"></a>00051 }
96 <a name="l00052"></a>00052
97 <a name="l00053"></a>00053 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (p_screensaver_ != NULL) <span class="comment">//just to be on the safe side, it should never be NULL if this line is reached</span>
98 <a name="l00054"></a>00054 {
99 <a name="l00055"></a>00055 <span class="keyword">delete</span> p_screensaver_; <span class="comment">//The object must be deleted to reverse the effect of setScreenSaverInhibit()</span>
100 <a name="l00056"></a>00056 p_screensaver_ = NULL;
101 <a name="l00057"></a>00057 isKeptLit_ = <span class="keyword">false</span>;
102 <a name="l00058"></a>00058
103 <a name="l00059"></a>00059 }
104 <a name="l00060"></a>00060
105 <a name="l00061"></a>00061 <span class="keywordflow">return</span>;
106 <a name="l00062"></a>00062
107 <a name="l00063"></a>00063 }
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