main.cpp Example File

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 #include <QApplication>
 #include <QPainter>
 #include <QTime>
 #include "block.h"
 #include "window.h"

 QImage createImage(int width, int height)
 {
     QImage image(width, height, QImage::Format_RGB16);
     QPainter painter;
     QPen pen;
     pen.setStyle(Qt::NoPen);
     QBrush brush(Qt::blue);

     painter.begin(&image);
     painter.fillRect(image.rect(), brush);
     brush.setColor(Qt::white);
     painter.setPen(pen);
     painter.setBrush(brush);

     static const QPointF points1[3] = {
         QPointF(4, 4),
         QPointF(7, 4),
         QPointF(5.5, 1)
     };

     static const QPointF points2[3] = {
         QPointF(1, 4),
         QPointF(7, 4),
         QPointF(10, 10)
     };

     static const QPointF points3[3] = {
         QPointF(4, 4),
         QPointF(10, 4),
         QPointF(1, 10)
     };

     painter.setWindow(0, 0, 10, 10);

     int x = 0;
     int y = 0;
     int starWidth = image.width()/3;
     int starHeight = image.height()/3;

     QRect rect(x, y, starWidth, starHeight);

     for (int i = 0; i < 9; ++i) {

         painter.setViewport(rect);
         painter.drawPolygon(points1, 3);
         painter.drawPolygon(points2, 3);
         painter.drawPolygon(points3, 3);

         if (i % 3 == 2) {
             y = y + starHeight;
             rect.moveTop(y);

             x = 0;
             rect.moveLeft(x);

         } else {
             x = x + starWidth;
             rect.moveLeft(x);
         }
     }

     painter.end();
     return image;
 }

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     qRegisterMetaType<Block>();
     qsrand(QTime::currentTime().elapsed());

     Window window;
     window.show();

     window.loadImage(createImage(256, 256));
     return app.exec();
 }