mainwindow.cpp

#include "mainwindow.h"
#include <QtWidgets>
#include <QAudioOutput>
#include "audio.h"
#include "spectrograph.h"

/*
 * File: mainwindow.cpp
 * Description:
 *  This source file impl:ements the 'MainWindow' class, providing functionality for the main UI.
 *  It initializes the main window, sets up the main layout in a vertical layout, and creates two
 *  'Audio' objects for dual audio playback functionality. The constructor creates the central widget,
 *  configures the vertical layout, and adds two 'Audio' widgets. The 'audio1' and 'audio2' widgets
 *  are integrated into the layout to enable independent audio playback and visualiztion within the
 *  UI layout.
 *
 * *Slots:
 *  - 'audio2ConnectAllowed(bool secondAudioExists)': emits a signal that the first audio
 *      can enable the align audio checkbox if there is a second audio available
 *  - 'audio2Connect(bool connectAudios)': connects or disconnects the controls for the first audio
 *      to the second
 *  - 'handleEndOfAudio2(bool disc)': connects/disconnects the second audio playing from the first incase the
 *      audios are two different sizes or are played simultaniously from different position and the second ends before
 *      the first.
 * Notes:
 *  - The 'Audio' class is used for playback and visualization(*). See 'audio.h' and 'audio.cpp' for
 *    its implementation.
 *  -
 *
 * References:
 *  - scroll area: https://stackoverflow.com/questions/65554770/qscrollarea-how-do-i-make-my-central-widget-scrollable

 */

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), connected(false)
{
    QScrollArea *scrollArea = new QScrollArea(this);
    // create central widget
    QWidget *center = new QWidget();
    setCentralWidget(scrollArea);
    scrollArea->setWidget(center);
    scrollArea->show();
    scrollArea->setWidgetResizable(true);

    // create main layout for central widget
    // this was V before
    mainLayout = new QVBoxLayout(center);

    audio1 = new Audio(nullptr, "Speaker Sound Wave");
    mainLayout->addWidget(audio1);

    // spectrograph 1
    Spectrograph *spectrograph1 = new Spectrograph();
    mainLayout->addWidget(spectrograph1, 0, Qt::AlignRight);
    connect(audio1, &Audio::audioFileSelected, spectrograph1, &Spectrograph::loadAudioFile);
    connect(audio1->alignAllAudioFocus, &QCheckBox::clicked, this, &MainWindow::audio2Connect);
    connect(this, &MainWindow::canEnableAudioAlignment, audio1, &Audio::enableAudioAligning);
    audio2 = new Audio(nullptr, "User Sound Wave", 1);
    mainLayout->addWidget(audio2);

    // spectrograph 2
    Spectrograph *spectrograph2 = new Spectrograph();
    mainLayout->addWidget(spectrograph2, 0, Qt::AlignRight);
    connect(audio2, &Audio::audioFileSelected, spectrograph2, &Spectrograph::loadAudioFile);
    connect(audio2, &Audio::secondAudioExists, this, &MainWindow::audio2ConnectAllowed);
    connect(this, &MainWindow::disableAudio2, audio2, &Audio::disableAudioControls);
    connect(audio2, &Audio::audioEnded, this, &MainWindow::handleEndOfAudio2);
    connect(audio1, &Audio::audioEnded, this, &MainWindow::handleEndOfAudio2);
    center->setLayout(mainLayout);
}
//all based on audio 0, the zoom, whenever one reaches the end, both stop, play pause affected, segment click stops allignment
void MainWindow::audio2ConnectAllowed(bool secondAudioExists){
    emit canEnableAudioAlignment(secondAudioExists);
}
void MainWindow::audio2Connect(bool connectAudios){
    if (connectAudios){
        emit disableAudio2(true);
        connected = true;
        connect(audio1, &Audio::playPauseActivated, audio2, &Audio::handlePlayPause);
        connect(audio1->zoomButtons, &Zoom::horizontalSliderChanged, audio2->zoomButtons, &Zoom::horizontalZoom);
        connect(audio1->zoomButtons, &Zoom::verticalSliderChanged, audio2->zoomButtons, &Zoom::verticalZoom);
        connect(audio1->zoomButtons, &Zoom::resetZoomActivated, audio2->zoomButtons, &Zoom::resetZoom);
        connect(audio1, &Audio::scrubberUpdate, audio2, &Audio::updateTrackPositionFromScrubber);
    }
    else{
        emit disableAudio2(false);
        connected = false;
        disconnect(audio1, &Audio::playPauseActivated, audio2, &Audio::handlePlayPause);
        disconnect(audio1->zoomButtons, &Zoom::horizontalSliderChanged, audio2->zoomButtons, &Zoom::horizontalZoom);
        disconnect(audio1->zoomButtons, &Zoom::verticalSliderChanged, audio2->zoomButtons, &Zoom::verticalZoom);
        disconnect(audio1->zoomButtons, &Zoom::resetZoomActivated, audio2->zoomButtons, &Zoom::resetZoom);
        disconnect(audio1, &Audio::scrubberUpdate, audio2, &Audio::updateTrackPositionFromScrubber);
    }
}
void MainWindow::handleEndOfAudio2(bool disc){
    if (disc && connected){
        connected = false;
        disconnect(audio1, &Audio::playPauseActivated, audio2, &Audio::handlePlayPause);
    }else if (!connected && !disc){
        connected = true;
        connect(audio1, &Audio::playPauseActivated, audio2, &Audio::handlePlayPause);
    }
}

MainWindow::~MainWindow() {

}