using two threads

[duma]

Hey guys,
I have a gui that outputs a sine wave and square wave with user input frequency and amplitude. My code to produce both the square and sine wave is tested and works successfully.
My problem is: I have the sine wave working. I used threads to start and eliminate(from click of pushButtons) the generation of the sine wave. I am trying to do the same for the square wave, but when I click the pushButton, it generates the sine wave again.
I am not sure where I am going wrong. Any help would be appreciated. Code snippets below:

wave.cpp:

wave::wave(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::wave)
{
ui->setupUi(this);
setup();
thread = new MyThread();
thread2 = new MyThread();


}
wave::~wave()
{
delete ui;
delete thread;
delete thread2;
}

void wave::on_pushButton_clicked()
{
//Generate
freq = ui->frequency->text().toDouble();
ampl = ui->amplitude->text().toDouble();
thread->start();
ui->pushButton->setEnabled(false);
ui->pushButton->setStyleSheet("background-color: gray");
ui->pushButton_2->setStyleSheet("background-color: rgb(255, 192, 192);"
"color: red;");
ui->pushButton_2->setEnabled(true);
}

void wave::on_pushButton_2_clicked()
{
//Terminate
thread->terminate();
ui->pushButton_2->setEnabled(false);
ui->pushButton_2->setStyleSheet("background-color: gray");
ui->pushButton->setStyleSheet("background-color: rgb(192, 255, 208);"
"color: green;");
ui->pushButton->setEnabled(true);

}


void wave::on_pushButton_3_clicked()
{
freq = ui->frequency->text().toDouble();
ampl = ui->amplitude->text().toDouble();
thread2->start();
ui->pushButton_3->setEnabled(false);
ui->pushButton_3->setStyleSheet("background-color: gray");
ui->pushButton_4->setStyleSheet("background-color: rgb(255, 192, 192);"
"color: red;");
ui->pushButton_4->setEnabled(true);
}

void wave::on_pushButton_4_clicked()
{
thread2->terminate();
ui->pushButton_4->setEnabled(false);
ui->pushButton_4->setStyleSheet("background-color: gray");
ui->pushButton_3->setStyleSheet("background-color: rgb(192, 255, 208);"
"color: green;");
ui->pushButton_3->setEnabled(true);
}

wave.h:

#ifndef WAVE_H
#define WAVE_H
#include "ui_wave.h"
#include <alsa/asoundlib.h>
#include <QMainWindow>
#include <QObject>
#include "mythread.h"

namespace Ui {
class wave;
}

class wave : public QMainWindow
{
Q_OBJECT
MyThread *thread;
MyThread *thread2;

public:
explicit wave(QWidget *parent = 0);
~wave();

private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();

void on_pushButton_3_clicked();

void on_pushButton_4_clicked();

private:
Ui::wave *ui;

};

void onWriteLoopSine();
void onWriteLoopSquare();

#endif // WAVE_H


mythread.h:

#ifndef MYTHREAD_H
#define MYTHREAD_H

#include <QThread>

class MyThread : public QThread
{
Q_OBJECT


protected:
void run();


public:
explicit MyThread(QObject *parent = 0);

};



#endif // MYTHREAD_H

mythread.cpp:

#include "wave.h"
#include "mythread.h"


MyThread::MyThread(QObject *parent) :
QThread(parent)
{
}


void MyThread::run()
{
onWriteLoopSine();
onWriteLoopSquare();
}

[wysota]

What's the contents of onWriteLoopSine() and onWriteLoopSquare() and why are you calling them one after the other? I thought you had two separate threads generating one wave each.

[duma]

What's the contents of onWriteLoopSine() and onWriteLoopSquare() and why are you calling them one after the other? I thought you had two separate threads generating one wave each.

Yes, thanks. I used booleans to call them seperately.