Widget::Widget(QWidget *parent)
: QWidget(parent)
{
red_button=new QRadioButton("red");
yellow_button=new QRadioButton("yellow");
green_button=new QRadioButton("green");
start_button=new QPushButton("start");
stop_button=new QPushButton("stop");
QVBoxLayout *layout=new QVBoxLayout;
layout->addWidget(red_button);
layout->addWidget(yellow_button);
layout->addWidget(green_button);
layout->addWidget(start_button);
layout->addWidget(stop_button);
red_button->setStyleSheet("background-color: grey;");
yellow_button->setStyleSheet("background-color: grey;");
green_button->setStyleSheet("background-color: grey;");
timer=new QTimer;
disable_lights();
connect(start_button,SIGNAL(clicked(bool)),this,SLOT(set_timer_start()));
connect(start_button,SIGNAL(clicked(bool)),this,SLOT(enable_lights()));
connect(stop_button,SIGNAL(clicked(bool)),timer,SLOT(stop()));
connect(stop_button,SIGNAL(clicked(bool)),this,SLOT(disable_lights()));
connect(timer,SIGNAL(timeout()),this,SLOT(change_light()));
setLayout(layout);
}
void open_close_bl()
{
if(flag)
{
light = atoi("0");
change_light("0");
flag = 0;
printf("Close LCD BackLight.\n");
}
else
{
light = atoi("100");
change_light("100");
flag = 1;
printf("Open LCD BackLight.\n");
}
}
int main(void)
{
char cmd[4];
light = 100;
flag = 1;
led1_flag = 1;
led2_flag = 1;
struct input_event t;
if ((open_device()) < 0)
return 0;
while(1)
{
if (read(key_fd, &t, sizeof(t)) == sizeof(t) && t.type==EV_KEY)
{
if (t.value == 0)
{
switch(t.code)
{
case 107:
open_close_bl();
break;
case 231:
if(!flag)
break;
if (light > 0)
{
light -= 10;
sprintf(cmd, "%d", light);
change_light(cmd);
printf("Current backlight lever is %d.\n",light);
}
else
{
printf("Current lever is the lowest!\n");
}
break;
case 158:
if(!flag)
break;
if (light < 150)
{
light += 10;
sprintf(cmd, "%d", light);
change_light(cmd);
printf("Current backlight lever is %d.\n",light);
}
else
{
printf("Current lever is the highest!\n");
}
break;
case 139:
if (led2_flag)
{
ioctl(led_fd, 0, 1);
led2_flag = 0;
}
else
{
ioctl(led_fd, 1, 1);
led2_flag = 1;
}
break;
case 102:
if (led1_flag)
{
ioctl(led_fd, 0, 0);
led1_flag = 0;
}
else
{
ioctl(led_fd, 1, 0);
led1_flag = 1;
}
break;
default:
break;
}
}
}
}
close_device();
}
