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#ifndef GRAPHLOGIC_H
#define GRAPHLOGIC_H
#include <QObject>
#include "node.h"
#include "graphwidget.h"
class GraphWidget;
class GraphLogic : public QObject
{
Q_OBJECT
public:
explicit GraphLogic(GraphWidget *parent = 0);
// functions on nodes
void addFirstNode();
void removeAllNodes();
void setActiveNode(Node *node);
bool readContentFromXmlFile(const QString &fileName);
void writeContentToXmlFile(const QString &fileName);
void writeContentToPngFile(const QString &fileName);
bool editing() const;
void passKey(QKeyEvent *event = 0);
// undo-able commands:
void insertNode();
void removeNode(const bool &subtree = false);
void scaleUp(const bool &subtree = false);
void scaleDown(const bool &subtree = false);
void setNodeColor(const QColor &color, const bool &subtree = false);
void setNodeTextColor(const QColor &color, const bool &subtree = false);
void addEdge();
void removeEdge();
void hintMode();
void insertPicture(const QString &picture);
void move(const int &x, const int &y, const bool &subtree = false);
void appendNumber(const int &unm);
void delNumber();
void applyNumber();
void nodeColor(const bool &subtree = false);
void nodeTextColor(const bool &subtree = false);
public slots:
void nodeChanged();
void nodeSelected();
void nodeEdited(QKeyEvent *event = 0);
void nodeMoved(QGraphicsSceneMouseEvent *event);
void nodeLostFocus();
signals:
void contentChanged();
void notification(const QString &msg);
private:
Node *nodeFactory();
void selectNode(Node *node);
// functions on the edges
QList<Edge *> allEdges() const;
void addEdge(Node *source, Node *destination);
void removeEdge(Node* source, Node *destination);
// hint mode's nodenumber handling functions
void showNodeNumbers();
void showingAllNodeNumbers(const bool &show = true);
void showingNodeNumbersBeginWithNumber(const int &prefix,
const bool &show = true);
GraphWidget *m_graphWidget;
QList<Node *> m_nodeList;
Node *m_activeNode;
bool m_showingNodeNumbers;
QString m_hintNumber;
Node *m_hintNode;
bool m_editingNode;
bool m_edgeAdding;
bool m_edgeDeleting;
};
#endif // GRAPHLOGIC_H