52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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MainWindow::MainWindow(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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connect(ui->slider,SIGNAL(valueChanged(int)),this,SLOT(sliderchanged(int)));
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fd_edp = ::open("/sys/class/backlight/edp-backlight/brightness",O_RDWR|O_NONBLOCK);
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fd_lvds = ::open("/sys/class/backlight/lvds-backlight/brightness",O_RDWR|O_NONBLOCK);
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fd_dsi = ::open("/sys/class/backlight/dsi1-backlight/brightness",O_RDWR|O_NONBLOCK);
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setWindowState(Qt::WindowMaximized);
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setWindowFlags(Qt::FramelessWindowHint | Qt::WindowTitleHint | Qt::WindowCloseButtonHint);
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ui->slider->setMinimum(1);
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ui->slider->setValue(200);
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connect(ui->exitBtn, &QPushButton::clicked, this, [=](){
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close();
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});
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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if (fd_edp > 0)
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::close(fd_edp);
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if (fd_dsi > 0)
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::close(fd_dsi);
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if (fd_lvds > 0)
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::close(fd_lvds);
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}
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void MainWindow::sliderchanged(int v)
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{
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char buf[20];
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sprintf(buf,"%d",v);
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if (fd_edp > 0)
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::write(fd_edp,buf,sizeof(buf));
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if (fd_dsi > 0)
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::write(fd_dsi,buf,sizeof(buf));
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if (fd_lvds > 0)
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::write(fd_lvds,buf,sizeof(buf));
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}
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