Projektarbeit_Lichtklavier/MainWindow.cpp

#include "MainWindow.h"
#include <vector>
#include <QTimer>

#include <QString>
#include <string>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    tabWidget = new QTabWidget(this);

    pianoKeyBoard = new PianoKeyBoard(-350, 175, 700, 500, this);
    circleOfFifths = new CircleOfFifths(-250, 0, 500, 500, this);
    scene_Demo = new QGraphicsScene(-250,0,500,500, this);

    gV_Keyboard = new QGraphicsView(pianoKeyBoard, tabWidget);
    gV_CircleOfFifths = new QGraphicsView(circleOfFifths, tabWidget);
    gV_Demo = new QGraphicsView(scene_Demo, tabWidget);
    midiLog = new QPlainTextEdit();


    tabWidget->addTab(gV_Keyboard, "Keyboard");
    tabWidget->addTab(gV_CircleOfFifths, "Circle of Fifths");
    tabWidget->addTab(gV_Demo, "Lightshow Demonstration");
    tabWidget->addTab(midiLog, "Midi Messages Log");

    setCentralWidget(tabWidget);
    midiPiano = new MidiListener;

    midiPiano->moveToThread(&midiThread);

    connect(this, &MainWindow::stopMidi, midiPiano, &MidiListener::stop);
    // Wenn THIS das signal "startMidiListener" abgibt, wird Slot midiPiano->start ausgeführt
    connect(this, &MainWindow::startMidiListener, midiPiano, &MidiListener::start);
    connect(this, &MainWindow::nextMidiMessage, midiPiano, &MidiListener::listen);
    // Wenn midiPiano das signal "newMidiMessage" abgibt, wird this.handlemidimessage ausgeführt
    connect(midiPiano, &MidiListener::newMidiMessage, this, &MainWindow::handleMidiMessage);
    midiThread.start();
    emit startMidiListener();

}

void MainWindow::lightShowDemonstration(int b1, int b2, int b3)
{
    if(b1==0x90)
    {
        if(b2>108 || b2<21) return;     //no valid piano-key
        scene_Demo->setBackgroundBrush(colorScale.getToneByKeyboardPosition(b2)->getColor());
    }
    else if(b1==0x80)
    {
        if(b2>108 || b2<21) return;     //no valid piano key
        if(scene_Demo->backgroundBrush().color() == colorScale.getToneByKeyboardPosition(b2)->getColor())   //only reset color if current color still is same tone
            scene_Demo->setBackgroundBrush(Qt::white);
    }

}

void MainWindow::handleMidiMessage(int b1, int b2, int b3){
    if(b1 != 0)
    {
        midiLog->appendPlainText(QString::asprintf("Byte 1: %x, Byte 2: %x, Byte 3: %x", b1, b2, b3));
        lightShowDemonstration(b1, b2, b3);
    }
    midiThread.msleep(10);
    emit nextMidiMessage();
}

MainWindow::~MainWindow()
{
    emit stopMidi();
    midiThread.quit();
    midiThread.wait();
}