Qt как сделать slider который меняет значение переменной от min=0 до max=4880
написал маленькую програмку для изменения яркости подсветки дисплея и клавиатуры двадцать лет ничего не писал :bandhead: для програмиста это займет несколько минут и не составит большого труда 8-)
всё работает как на рис1, но яркость меняется дискретно
а хотелось бы чтобы менялась плавно слайдером, как на рис2 для дисплея $lcd мин 0 макс 4880 system(«echo $lcd >> /sys/class/backlight/intel_backlight/brightness»);
для клавиатуры $kbd от 0 до 3 system(«echo $kbd >> /sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness»);
рис1 [img=41x176, 6.4Kb]http://storage7.static.itmages.ru/i/13/0721/s_1374391585_1492002_b1f0936c4d.png[/img] рис2 [img=64x176, 7.8Kb]http://storage8.static.itmages.ru/i/13/0721/s_1374391644_1825647_fa7f099c64.png[/img]
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void on_pushButton_3_clicked();
void on_pushButton_4_clicked();
void on_pushButton_5_clicked();
void on_pushButton_6_clicked();
void on_pushButton_7_clicked();
void on_pushButton_8_clicked();
void on_pushButton_9_clicked();
void on_pushButton_10_clicked();
void on_pushButton_11_clicked();
void on_pushButton_12_clicked();
void on_pushButton_13_clicked();
void on_pushButton_14_clicked();
void on_pushButton_15_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
system("echo 488 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_2_clicked()
{
system("echo 976 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_3_clicked()
{
system("echo 1464 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_4_clicked()
{
system("echo 1952 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_5_clicked()
{
system("echo 2440 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_6_clicked()
{
system("echo 2928 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_7_clicked()
{
system("echo 3416 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_8_clicked()
{
system("echo 3904 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_9_clicked()
{
system("echo 4392 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_10_clicked()
{
system("echo 4880 >> /sys/class/backlight/intel_backlight/brightness");
}
void MainWindow::on_pushButton_11_clicked()
{
system("echo 0 >> /sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness");
}
void MainWindow::on_pushButton_12_clicked()
{
system("echo 1 >> /sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness");
}
void MainWindow::on_pushButton_13_clicked()
{
system("echo 2 >> /sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness");
}
void MainWindow::on_pushButton_14_clicked()
{
system("echo 3 >> /sys/devices/platform/asus-nb-wmi/leds/asus\:\:kbd_backlight/brightness");
}
void MainWindow::on_pushButton_15_clicked()
{
system("echo 122 >> /sys/class/backlight/intel_backlight/brightness");
}
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>89</width>
<height>398</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralWidget">
<widget class="QPushButton" name="pushButton">
<property name="geometry">
<rect>
<x>10</x>
<y>40</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>01</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_2">
<property name="geometry">
<rect>
<x>10</x>
<y>70</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>02</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_3">
<property name="geometry">
<rect>
<x>10</x>
<y>100</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>03</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_4">
<property name="geometry">
<rect>
<x>10</x>
<y>130</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>04</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_5">
<property name="geometry">
<rect>
<x>10</x>
<y>160</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>05</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_6">
<property name="geometry">
<rect>
<x>10</x>
<y>190</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>06</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_7">
<property name="geometry">
<rect>
<x>10</x>
<y>220</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>07</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_8">
<property name="geometry">
<rect>
<x>10</x>
<y>250</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>08</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_9">
<property name="geometry">
<rect>
<x>10</x>
<y>280</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>09</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_10">
<property name="geometry">
<rect>
<x>10</x>
<y>310</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>10</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_11">
<property name="geometry">
<rect>
<x>50</x>
<y>10</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>00</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_12">
<property name="geometry">
<rect>
<x>50</x>
<y>40</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>01</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_13">
<property name="geometry">
<rect>
<x>50</x>
<y>70</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>02</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_14">
<property name="geometry">
<rect>
<x>50</x>
<y>100</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>03</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_15">
<property name="geometry">
<rect>
<x>10</x>
<y>10</y>
<width>31</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>00</string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menuBar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>89</width>
<height>30</height>
</rect>
</property>
</widget>
<widget class="QToolBar" name="mainToolBar">
<attribute name="toolBarArea">
<enum>TopToolBarArea</enum>
</attribute>
<attribute name="toolBarBreak">
<bool>false</bool>
</attribute>
</widget>
<widget class="QStatusBar" name="statusBar"/>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources/>
<connections/>
</ui>