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 *   Copyright (C) 2003-2005 by David Saxton                               *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *


#include <qcanvas.h>
#include <qguardedptr.h>
#include <qvaluevector.h>

class Cell;
class ConnectorData;
class ConnectorLine;
class ConRouter;
class CNItem;
class ICNDocument;
class Node;
class NodeGroup;
class Wire;

typedef QValueList<ConnectorLine*> ConnectorLineList;
typedef QValueList<QPoint> QPointList;
typedef QValueVector<QGuardedPtr<Wire> > WireVector;

@short Represents a connection between two Nodes on a ICNDocument
@author David Saxton
00037 class Connector : public QObject, public QCanvasPolygon
      Connector( Node * startNode, Node * endNode, ICNDocument *_ICNDocument, QString *id = 0L );
      virtual int rtti() const;
       * Node at start of connector (which refers to this as the output connector)
00048       Node * startNode() const { return m_startNode; }
       * Node at end of connector (which refers to this as the input connector)
00052       Node * endNode() const { return m_endNode; }
       * @returns connector data describing this connector
      ConnectorData connectorData() const;
       * Restore the state of the connector (route, etc) from the saved data
      void restoreFromConnectorData( const ConnectorData &connectorData );
       * If selected, will be drawn in a different colour
      virtual void setSelected( bool yes );
       * Connected id
00068       QString id() const { return m_id; }
       * Update the list of lines and connetion-points that the connector uses for
       * drawing.
      void updateDrawList();
       * Tells the connector that it is under the control of a NodeGroup. When
       * the connector is under the control of a NodeGroup, all requests for
       * connection rerouting will be passed onto that NodeGroup
00079       void setNodeGroup( NodeGroup *nodeGroup ) { p_nodeGroup = nodeGroup; }
       * Returns the NodeGroup that the connector is under the control of (if any)
00083       NodeGroup *nodeGroup() const { return p_nodeGroup; }
       * ICNDocument needs to know what 'cells' a connector is present in,
       * so that connection mapping can be done to avoid connectors.
       * This function will add the hit penalty to the cells pointed to
       * by ICNDocument::cells()
      void updateConnectorPoints( bool add );
       * Sets the canvas points that the connector should route itself along.
       * This is used for manual routing. The cells points are absolute positions
       * (unlike the points stored internally in this class, which are the cell poisition
       * @param setManual if true then the connector will change to a manual route one
       * @param checkEndPoints if true then will  check to see if the end points are at the nodes, and adds them if not
      void setRoutePoints( QPointList pointList, bool setManual, bool checkEndPoints = false );
       * Call this function (e.g. when moving a CNItem connected to the connector)
       * to make the connector partially hidden - probably grayed out - if semiHidden
       * is true.
      void setSemiHidden( bool semiHidden );
       * Sets the container parent (i.e. the container of the parent item)
      void setParentContainer( const QString &cnItemId );
       * Returns a pointer to the parent item container
00112       CNItem *parentContainer() const { return p_parentContainer; }
       * @returns whether the points have been set by the user manually defining them
00116       bool usesManualPoints() const { return b_manualPoints; }
       * Returns two sets of points (in canvas-reference) that define the connector
       * from start to finish, when it is split at the given point (in canvas-reference)
      QValueList<QPointList> splitConnectorPoints( const QPoint &pos ) const;
       * @returns pointer to ICNDocument that this connector is a member of
00125       ICNDocument *icnDocument() const { return p_icnDocument; }
       * Looks at the set of canvas points and tries to determine whether they are
       * in the reverse order from start to end node
      bool pointsAreReverse( const QPointList &pointList ) const;
       * Returns the points, given in canvas-reference, in order of start node to
       * end node if reverse is false
       * @param reverse whether or not to reverse the points from start node to end node
      QPointList connectorPoints( bool reverse = false ) const;
       * Reroute the connector. Note that if this connector is controlled by a
       * NodeGroup, it will do nothing (other than print out a warning)
      void rerouteConnector();
       * Translates the route by the given amoumt. No checking is done to see if
       * the translation is useful, etc.
      void translateRoute( int dx, int dy );
      virtual void setVisible( bool yes );
      WireVector wires() const { return m_wires; }
      unsigned numWires() const { return m_wires.size(); }
      Wire * wire( unsigned num = 0 ) const { return (num < m_wires.size()) ? m_wires[num] : 0l; }
      void removed( Connector *connector );
      void selected( bool yes );
      void numWiresChanged( unsigned newNum );
public slots:
      void removeConnector( Node* = 0L );
       * Takes the minimum pin count of the start and end nodes, and creates a
       * connector for each pin up to that minimum.
      void syncWiresWithNodes();
      void updateConnectorLines();
      bool m_bIsSyncingWires;
      bool b_semiHidden;
      QGuardedPtr<Node> m_startNode;
      QGuardedPtr<Node> m_endNode;
      NodeGroup *p_nodeGroup;
      CNItem *p_parentContainer;
      ICNDocument *p_icnDocument;
      ConRouter *m_conRouter;
      QString m_id;
      ConnectorLineList m_connectorLineList;
      QRect m_oldBoundRect;
      WireVector m_wires;
      bool b_deleted;
      bool b_manualPoints;
      bool b_pointsAdded;
typedef QValueList<QGuardedPtr<Connector> > ConnectorList;

//BEGIN ConnectorLine things
class ConnectorLine : public QObject, public QCanvasLine
            ConnectorLine( Connector *connector );
            Connector *parent() const { return p_connector; }
            virtual int rtti() const;
            Connector *p_connector;
//END ConnectorLine things


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