mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtWidgets>
#include <math.h>
#include "mouse.h"

static const int MouseCount = 7;

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    //Setup Main Window
    this->statusBar()->setSizeGripEnabled(false);
    this->setFixedSize(this->size().width(), this->size().height());

    qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));

    //QGraphicsScene scene;
    scene = new QGraphicsScene(this);
    scene->setSceneRect(-300, -300, 800, 600);
    scene->setItemIndexMethod(QGraphicsScene::NoIndex);

    for (int i = 0; i < MouseCount; ++i) {
        Mouse *mouse = new Mouse;
        mouse->setPos(::sin((i * 6.28) / MouseCount) * 200,
                      ::cos((i * 6.28) / MouseCount) * 200);
        scene->addItem(mouse);
    }

    ui->gvSim->setScene(scene);
    ui->gvSim->setRenderHint(QPainter::Antialiasing);
    ui->gvSim->setBackgroundBrush(QPixmap(":/images/cheese.jpg"));
    ui->gvSim->setCacheMode(QGraphicsView::CacheBackground);
    ui->gvSim->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    ui->gvSim->setDragMode(QGraphicsView::ScrollHandDrag);
    ui->gvSim->show();

    QTimer timer;
    QObject::connect(&timer, SIGNAL(timeout()), scene, SLOT(advance()));
    timer.start(1000 / 33);

}

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