mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent), ui(new Ui::MainWindow),
    bw1(nullptr), bw2(nullptr), bw3(nullptr), bw4(nullptr), mt(rd())
{
    ui->setupUi(this);

    bw1 = new BezierWaveBean(this);
//    bw1->set_offsety(geometry().height()/20);
    bw1->set_speedx(getRandom(1,5));
    bw1->start();

    bw2 = new BezierWaveBean(this);
//    bw2->set_offsety(geometry().height()/10);
    bw2->set_speedx(getRandom(1,5));
    bw2->start();

    bw3 = new BezierWaveBean(this);
//    bw3->set_offsety(geometry().height()*3/20);
    bw3->set_speedx(getRandom(1,5));
    bw3->start();

    bw4 = new BezierWaveBean(this);
//    bw4->set_offsety(geometry().height()/5);
    bw4->set_speedx(getRandom(1,5));
    bw4->start();
}

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

void MainWindow::paintEvent(QPaintEvent *e)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);

    QPainterPath bezier;

    if (bw1 != nullptr)
        bezier = bw1->getPainterPath(painter);
    painter.fillPath(bezier, QColor(255, 0, 0, 50));

    if (bw2 != nullptr)
        bezier = bw2->getPainterPath(painter);
    painter.fillPath(bezier, QColor(255, 0, 0, 50));

    if (bw3 != nullptr)
        bezier = bw3->getPainterPath(painter);
    painter.fillPath(bezier, QColor(255, 0, 0, 50));

    if (bw4 != nullptr)
        bezier = bw4->getPainterPath(painter);
    painter.fillPath(bezier, QColor(255, 0, 0, 50));

    return QMainWindow::paintEvent(e);
}

void MainWindow::resizeEvent(QResizeEvent *e)
{
    bw1->set_rect(geometry());
    bw2->set_rect(geometry());
    bw3->set_rect(geometry());
    bw4->set_rect(geometry());
    return QMainWindow::resizeEvent(e);
}

int MainWindow::getRandom(int min, int max)
{
#if defined (Q_OS_WIN) || defined(Q_OS_LINUX)
    return mt() % (max-min+1) + min;
#elif defined(Q_OS_MAC)

#else
    return rand() % (max-min+1) + min;
#endif
}

void MainWindow::on_pushButton_clicked()
{
    bw1->pause();
    bw2->pause();
    bw3->pause();
    bw4->pause();
}

void MainWindow::on_pushButton_2_clicked()
{
    bw1->resume();
    bw2->resume();
    bw3->resume();
    bw4->resume();
}