// This code example is created for educational purpose
// by Thorsten Thormaehlen (contact: www.thormae.de).
// It is distributed without any warranty.

#include <QApplication>
#include <QLabel>
#include <QWidget>
#include <QMouseEvent>

class MyWidget : public QWidget {

public:
  MyWidget(QWidget *parent = NULL) : QWidget(parent) {
    this->resize(320, 240);
    this->setWindowTitle("HelloGUI with Qt");
    label = new QLabel("Position 0, 0", this);
    label->setGeometry(120, 20, 150, 30);
  }

protected:
  void mousePressEvent(QMouseEvent *e)
  {
    int x = e->x();
    int y = e->y();
    label->setText(QString("Position %1, %2").arg(x).arg(y));
  }
private:
  QLabel* label;

};

int main (int argc, char* argv[]) {
  // create a QApplication object that handles initialization,
  // finalization, and the main event loop
  QApplication appl(argc, argv);
  MyWidget widget;  // create a widget
  widget.show(); //show the widget and its children
  return appl.exec(); // execute the application
}