#include "target.h"#include <QtGui>#include <QTextCodec>#include <QtDebug>#include <math.h>#include "radar.h"static const int TargetCount = 200;int main(int argc, char **argv){    QApplication app(argc, argv);	QTextCodec::setCodecForTr(QTextCodec::codecForLocale());    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));    QGraphicsScene scene;    scene.setSceneRect(-400, -300, 800, 600);    scene.setItemIndexMethod(QGraphicsScene::NoIndex);    for (int i = 0; i < TargetCount; ++i) {        Target *target = new Target;        target->setPos(qrand() % 800 - 400,                      qrand() % 600 - 300);	target->setVisible(true);        scene.addItem(target);    }    RadarView view(&scene);    view.setRenderHint(QPainter::Antialiasing);    view.setBackgroundBrush(Qt::black);    view.setCacheMode(QGraphicsView::CacheBackground);    view.setDragMode(QGraphicsView::ScrollHandDrag);    view.setWindowTitle(QObject::tr("海戰(zhàn)模擬"));    view.resize(800, 600);    view.show();    return app.exec();}