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void Prog::MySLot(int val)
{
   emit OtherSignal(val);
   //do something
}

void Player::SetVolume2()
{
    int volume = volume_int;
    if(volume>0)
    {
        Muted=false;
    }
    emit UpdateSettingsParamSignal(QString("volumelevel"),QString().setNum(volume));

    ui->muteButton->setChecked(false);
    ui->VolumeSlider->setValue(volume);
    float vol=(float)((float)volume/(float)100);
    BASS_ChannelSetAttribute(chan, BASS_ATTRIB_VOL,vol);

}

void MainWindow::Do()
{
    QThread *tdh = new QThread;
    connect(tdh,SIGNAL(started()),this,SLOT(Do2()));
    tdh->start();

}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QThread>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    connect(ui->pushButton,SIGNAL(clicked(bool)),this,SLOT(Do()));
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::Do()
{
    QThread *tdh = new QThread;
    connect(tdh,SIGNAL(started()),this,SLOT(Do2()));
    tdh->start();

}
void MainWindow::Do2()
{
    QThread::sleep(2);
    ui->plainTextEdit->document()->setPlainText(QDateTime::currentDateTime().toString());
}