PROBLEM:
Qt Code: 
  1. Object::connect: No such signal MTR::PawnBox::dragHasBegun(const MTR::PawnBox::Pawn*)
To copy to clipboard, switch view to plain text mode 

CODE:
Qt Code: 
  1. #ifndef PAWNBOX_SAFETY_DECLARATION
  2. #define PAWNBOX_SAFETY_DECLARATION
  4. class QPixmap;
  5. #include <QWidget>
  6. #include <QRectF>
  7. #include <QColor>
  8. #include <QMap>
  9.  
  10. namespace MTRUTIL {
  11. const int AMOUNT_OF_PAWNS = 8;
  12. }
  13.  
  14. namespace MTR {
  15. class PawnBox : public QWidget {
  16. 	Q_OBJECT
  17. public:
  18. 	PawnBox(QWidget *parent = 0);
  19. 	~PawnBox() { delete px; }
  20. 	//klasa pionka
  21. 	class Pawn {
  22. 	public:
  23. 		Pawn();
  24. 		Pawn(QColor &color, QRectF &rec, QString &id);
  25. 		~Pawn();
  26. 		const QColor &color() const { return color_; }
  27. 		const QRectF &rectF() const { return rectF_; }
  28. 		const QString &id() const { return id_; }
  29. 		const QPixmap &internalPicture() const { return dragPicture; }
  30. 	private:
  31. 		void paintInternalPicture();
  32. 		QColor color_;
  33. 		QRectF rectF_;
  34. 		QString id_;
  35. 		QPixmap dragPicture;
  36. 	};
  37. 	//
  38. signals:
  39. 	void dragHasBegun(const Pawn *pw);
  40. protected:
  41. 	void paintEvent(QPaintEvent *event);
  42. 	void mousePressEvent(QMouseEvent *event);
  43. 	void mouseMoveEvent(QMouseEvent *event);
  44. 	void dragMoveEvent(QDragMoveEvent *event);
  45. 	void dragEnterEvent(QDragEnterEvent *event);
  46. private:
  47. 	void startDrag();
  48. 	QPoint startPos;
  49. 	QPixmap *px;
  50. 	bool insidePawn;
  51. 	Pawn *draggedPawn;
  52. 	QMap<int, Pawn> pawnCollection;
  53. };
  54. }
  55. #endif
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. void PawnBox::startDrag() {
  2. 	QMimeData *mimeData = new QMimeData;
  3. 	mimeData->setText(draggedPawn->id());
  4. 	QDrag *drag = new QDrag(this);
  5. 	drag->setPixmap(draggedPawn->internalPicture());
  6. 	drag->setMimeData(mimeData);
  7. 	drag->setHotSpot(QPoint(10,10));
  8.  
  9. 	drag->setDragCursor(*px,Qt::MoveAction);
  10. 	drag->setDragCursor(*px,Qt::CopyAction);
  11. 	const Pawn *pt = draggedPawn;
  12. 	emit dragHasBegun(pt);
  13. 	drag->start(Qt::MoveAction);
  14.  
  15. }
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. #ifndef GAMEWIDGET_SAFETY_DECLARATION
  2. #define GAMEWIDGET_SAFETY_DECLARATION
  7. #include "../MTRPawnBox/mtrpawn.hpp"
  8. #include <QWidget>
  9.  
  10. namespace MTR {
  11. class GameWidget : public QWidget {
  12. 	Q_OBJECT
  13. public:
  14. 	GameWidget(QWidget *parent = 0);
  15. public slots:
  16. 	void setDraggedPawnPointer(const PawnBox::Pawn *pw);
  17. 	//void debugOne() { qDebug(draggedPawn->id().toStdString().c_str()); }
  18. protected:
  19. 	void paintEvent(QPaintEvent *event);
  20. 	void mousePressEvent(QMouseEvent *event);
  21. 	void mouseMoveEvent(QMouseEvent *event);
  22. 	void dragMoveEvent(QDragMoveEvent *event);
  23. 	void dragEnterEvent(QDragEnterEvent *event);
  24. private:
  25. 	MTR::PawnBox::Pawn *draggedPawn;
  26. };
  27. }
  28. #endif
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. void GameWidget::setDraggedPawnPointer(const PawnBox::Pawn *pw) {
  2. 	if(pw) draggedPawn = const_cast<PawnBox::Pawn *>(pw); 
  3. 	else draggedPawn = 0; 
  4. }
To copy to clipboard, switch view to plain text mode 

All is connected in main window widget:
Qt Code: 
  1. connect(pawnBox,SIGNAL(dragHasBegun(const MTR::PawnBox::Pawn *)),gameScreen,SLOT(setDraggedPawnPointer(const MTR::PawnBox::Pawn *)));
To copy to clipboard, switch view to plain text mode 
where
Qt Code: 
  1. MTR::PawnBox *pawnBox;
  2. 	QWidget *firstMenuScreen;
  3. 	QWidget *rulesScreen;
  4. 	QWidget *resultsScreen;
  5. 	QWidget *gameChoiceScreen;
  6. 	QWidget *globalRecordsScreen;
  7. 	QWidget *localRecordsScreen;
  8. 	MTR::GameWidget *gameScreen;
To copy to clipboard, switch view to plain text mode