qt_game.cpp

#include "Game.h"

Game::Game(QWidget *parent)
    : QWidget(parent)
{
    setFixedSize(800, 600);

    man = new Man(200, 200);
    QObject::connect(man, SIGNAL(PositionChange(int,int)), parent, SLOT(ChangeLCD(int, int)));

    timer = new QTimer(this);
    timer->start(1000/60);   // 60fps
    QObject::connect(timer, SIGNAL(timeout()), this, SLOT(RefreshFrame()));
}
void Game::RefreshFrame()
{
    man->UpdatePosition();
    repaint(); // call paintEvent
}
void Game::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    man->PaintMan(painter);
}
void Game::keyPressEvent(QKeyEvent *event)
{
    switch (event->key()) {
        case Qt::Key_Right: man->setVelocity(3, 0);  break;
        case Qt::Key_Left:  man->setVelocity(-3, 0); break;
        case Qt::Key_Up:    man->setVelocity(0, -3); break;
        case Qt::Key_Down:  man->setVelocity(0, 3);  break;
    }
}
void Game::keyReleaseEvent(QKeyEvent *event)
{
    man->setVelocity(0, 0);
}