backlight.cpp
520 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
#include "backlight.h"
#include "system.h"
namespace {
int setting = 7;
bool lowered = false;
}
void Backlight::lower()
{
lowered = true;
int t = setting - 2;
if (t < 0)
System::setBacklight(0);
else
System::setBacklight(t);
}
void Backlight::restore()
{
lowered = false;
System::setBacklight(setting);
}
void Backlight::set(int level)
{
if (level < 0 || level > 7)
return;
setting = level;
if (lowered)
lower();
else
restore();
}