Qt 5.6 | Qt Widgets | Drag and Drop Robot Example | main.cpp Example File

Qt 5.6.3 Reference Documentation

# main.cpp Example File

graphicsview/dragdroprobot/main.cpp

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      #include <QtWidgets>

      #include "coloritem.h"
      #include "robot.h"

      #include <math.h>

      class GraphicsView : public QGraphicsView
      {
      public:
          GraphicsView(QGraphicsScene *scene) : QGraphicsView(scene)
          {
          }

      protected:
          virtual void resizeEvent(QResizeEvent *) Q_DECL_OVERRIDE
          {
          }
      };

      int main(int argc, char **argv)
      {
          QApplication app(argc, argv);

          qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
          QGraphicsScene scene(-200, -200, 400, 400);

          for (int i = 0; i < 10; ++i) {
              ColorItem *item = new ColorItem;
              item->setPos(::sin((i * 6.28) / 10.0) * 150,
                           ::cos((i * 6.28) / 10.0) * 150);

              scene.addItem(item);
          }

          Robot *robot = new Robot;
          robot->setTransform(QTransform::fromScale(1.2, 1.2), true);
          robot->setPos(0, -20);
          scene.addItem(robot);
          GraphicsView view(&scene);
          view.setRenderHint(QPainter::Antialiasing);
          view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
          view.setBackgroundBrush(QColor(230, 200, 167));
          view.setWindowTitle("Drag and Drop Robot");
           view.show();

          return app.exec();
      }