Qt 5.6 | Qt Core | Queued Custom Type Example | main.cpp Example File

Qt 5.6.2 Reference Documentation

# main.cpp Example File

threads/queuedcustomtype/main.cpp

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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();
      }