Why doesn't this button become invisible?

[Plixil]

I want a button to become invisible when I click on it. I'm inheriting from QPushButton and then promoting. I know the button is being created properly because when I put the setVisible part into the constructor, it works. It just doesn't work when I click on the button when the program is running, despite my attempt to override the QPushButton functions of click() or clicked(). What am I doing wrong here? How can I get this to work?

#ifndef SOUNDBUTTON_H
#define SOUNDBUTTON_H
 
#include <QPushButton>
 
class SoundButton : public QPushButton
{
public:
    SoundButton(QWidget *parent = 0);
 
    void click();
    void clicked();
};
 
#endif // SOUNDBUTTON_H
 
// the cpp file
 
#include "soundbutton.h"
#include <stdio.h>
 
SoundButton::SoundButton(QWidget *parent)
    : QPushButton(parent)
{
    printf("test me"); //doesn't output but not related to the problem
}
 
void SoundButton::click()
{
    this->setVisible(false);
}
 
void SoundButton::clicked()
{
    this->setVisible(false);
}

#ifndef SOUNDBUTTON_H
#define SOUNDBUTTON_H

#include <QPushButton>

class SoundButton : public QPushButton
{
public:
    SoundButton(QWidget *parent = 0);

    void click();
    void clicked();
};

#endif // SOUNDBUTTON_H

// the cpp file

#include "soundbutton.h"
#include <stdio.h>

SoundButton::SoundButton(QWidget *parent)
    : QPushButton(parent)
{
    printf("test me"); //doesn't output but not related to the problem
}

void SoundButton::click()
{
    this->setVisible(false);
}

void SoundButton::clicked()
{
    this->setVisible(false);
}

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