File indexing completed on 2024-04-14 05:37:02

 /***************************************************************************
  *   Copyright (C) 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.                                   *
  ***************************************************************************/
 
 #ifndef ICNDOCUMENT_H
 #define ICNDOCUMENT_H
 
 #include "itemdocument.h"
 
 #include <QMap>
 
 class Cells;
 class CNItem;
 class CNItemGroup;
 class Connector;
 class ECNode;
 class FlowContainer;
 class Node;
 class NodeGroup;
 
 typedef QMap<QString, Node *> NodeMap;
 typedef QList<QPointer<Connector>> ConnectorList;
 typedef QList<QPointer<Node>> NodeList;
 typedef QList<NodeGroup *> NodeGroupList;
 typedef QList<QPointer<NodeGroup>> GuardedNodeGroupList;
 
 /**
 @author David Saxton
 */
 class ICNDocument : public ItemDocument
 {
     Q_OBJECT
 public:
     ICNDocument(const QString &caption);
 
     ~ICNDocument() override;
 
     enum hit_score { hs_none = 0, hs_connector = 4, hs_item = 1000 };
 
     View *createView(ViewContainer *viewContainer, uint viewAreaId) override;
 
     /**
      * Will attempt to create an item with the given id at position p. Some item
      * (such as PIC/START) have restrictions, and can only have one instance of
      * themselves on the canvas, and adds the operation to the undo list
      */
     Item *addItem(const QString &id, const QPoint &p, bool newItem) override;
 
     /**
      * short for casting whatever itemWithID(id) returns
      */
     CNItem *cnItemWithID(const QString &id);
     /**
      * Returns a pointer to a node on the canvas with the given id,
      * or nullptr if no such node exists
      */
     virtual Node *nodeWithID(const QString &id) = 0;
     /**
      * Returns a pointer to a Connector on the canvas with the given id,
      * or nullptr if no such Connector exists
      */
     Connector *connectorWithID(const QString &id);
     /**
      * Adds a KtlQCanvasItem to the delete list to be deleted,
      * when flushDeleteList() is called
      */
     void appendDeleteList(KtlQCanvasItem *qcanvasItem) override;
     /**
      * Permantly deletes all items that have been added to the delete list with
      * the appendDeleteList( KtlQCanvasItem *qcanvasItem ) function.
      */
     void flushDeleteList() override = 0;
     /**
      * Reinherit this function to perform special checks on whether the two
      * given QCanvasItems (either nodes or connectors or both) can be
      * connected together.
      */
     virtual bool canConnect(KtlQCanvasItem *qcanvasItem1, KtlQCanvasItem *qcanvasItem2) const;
     /**
      *        copies the selected items to the clipboard, in an XML text form
      */
     void copy() override;
     /**
      *        selects everything in the current document
      */
     void selectAll() override;
 
     /**
      * registers (adds to the document) an item (a connector or a node)
      * @param qcanvasItem the item to be registered
      * @return true if succeeded, false if it didn't
      */
     bool registerItem(KtlQCanvasItem *qcanvasItem) override;
     /**
      * Returns a pointer to the 2-dimension array of ICNDocument cells.
      */
     Cells *cells() const
     {
         return m_cells;
     }
     /**
      * Adds score to the cells at the given cell referece
      */
     void addCPenalty(int x, int y, int score);
     /**
      * If there are two connectors joined to a node, then they can be merged
      * into one connector. The node will not be removed.
      * @param node The node between the two connectors
      * @param noCreate If true, no new connectors will be created
      * @returns true if it was successful in merging the connectors
      */
     // bool joinConnectors( Node *node );
     /**
      * Snaps a coordinate in the document to the grid
      * @param pos The coordinate
      * @return The snapped to grid coordinate
      */
     static int gridSnap(int pos); /// Returns 'pos' when snapped to grid
     /**
      * Snaps a point to the grid
      * @param pos The point
      * @return The adjusted coordinate
      */
     static QPoint gridSnap(const QPoint &pos);
     /**
      * Returns true if the CNItem is valid - e.g. will return true for a
      * component in a circuit, but not in a pic program
      */
     bool isValidItem(Item *item) override = 0;
     bool isValidItem(const QString &itemId) override = 0;
 
     // TODO to document
     virtual ConnectorList getCommonConnectors(const ItemList &list);
     virtual NodeList getCommonNodes(const ItemList &list);
 
     /**
      * returns all the nodes contained by the document. Note that this function is inefficient,
      * so don't use it in loops
      * @return all the nodes contained by the document
      */
     virtual NodeList nodeList() const = 0;
 
     /**
      * @return all the connectors from the document
      */
     const ConnectorList &connectorList() const
     {
         return m_connectorList;
     }
 
     /**
      * @return all the nodegroups from the document
      */
     const GuardedNodeGroupList &nodeGroupList() const
     {
         return m_nodeGroupList;
     }
 
     /**
      * @return the selected items from the document
      */
     ItemGroup *selectList() const override;
 
     /**
      * Creates a connector between two nodes, and returns a pointer to it
      * and adds the operation to the undo list
      */
     virtual Connector *createConnector(const QString &startNodeId, const QString &endNodeId, QPointList *pointList = nullptr) = 0;
     /**
      * Creates a connector from node1 to node2. If pointList is non-null, then the
      * connector will be assigned those points
      */
     // virtual
 
     Connector *createConnector(Node *node1, Node *node2, QPointList *pointList = nullptr);
     /**
      * Splits Connector con into two connectors at point pos2, and creates a connector from the node
      * to the intersection of the two new connectors. If pointList is non-null, then the new connector
      * from the node will be assigned those points
      */
     virtual Connector *createConnector(Node *node, Connector *con, const QPoint &pos2, QPointList *pointList = nullptr) = 0;
     /**
      * Splits con1 and con2 into two new connectors each at points pos1 and pos2, and creates a new connector
      * between the two points of intersection given by pos1 and pos2. If pointList is non-null, then the new
      * connector between the two points will be assigned those points
      */
     virtual Connector *createConnector(Connector *con1, Connector *con2, const QPoint &pos1, const QPoint &pos2, QPointList *pointList = nullptr) = 0;
     /**
      * Returns the flowcontainer at the given position at the highest level that
      * is not in the current select list, or nullptr if there isn't one
      */
     FlowContainer *flowContainer(const QPoint &pos);
     /**
      * Sets the drag (e.g. horizontal arrow) cursor for resizing a CNItem, depending on the corner clicked on
      */
     void setItemResizeCursor(int cornerType);
 
     void getTranslatable(const ItemList &itemList, ConnectorList *fixedConnectors = nullptr, ConnectorList *translatableConnectors = nullptr, NodeGroupList *translatableNodeGroups = nullptr);
 
     /**
      * Reroutes invalidated directors. You shouldn't call this function
      * directly - instead use ItemDocument::requestEvent.
      */
     void rerouteInvalidatedConnectors();
     /**
      * Assigns the orphan nodes into NodeGroups. You shouldn't call this
      * function directly - instead use ItemDocument::requestEvent.
      */
     virtual void slotAssignNodeGroups();
 
     void unregisterUID(const QString &uid) override;
 
 public slots:
     /**
      * Deletes all items in the selected item list, along with associated
      * connectors, etc, and adds the operation to the undo list
      */
     void deleteSelection() override;
     /**
      * This function looks at all the connectors and the nodes, determines
      * which ones need rerouting, and then reroutes them
      */
     void requestRerouteInvalidatedConnectors();
     /**
      * Remaps the 2-dimension array of ICNDocument cells, and the various
      * hitscores / etc associated with them. This is used for connector
      * routing, and should be called after e.g. items have been moved
      */
     void createCellMap();
     /**
      * Call this to request NodeGroup reassignment.
      */
     void slotRequestAssignNG();
 
 signals:
     /**
      * Emitted when a Connector is added
      */
     void connectorAdded(Connector *connector);
     /**
      * Emitted when a Node is added
      */
     void nodeAdded(Node *node);
 
 protected:
     /**
      * Adds all connector points from the items (used in connector routing).
      * This only needs to be called when connector(s) need routing.
      */
     void addAllItemConnectorPoints();
 
     void fillContextMenu(const QPoint &pos) override;
     /**
      * Creates a new NodeGroup to control the node, if there does not already
      * exist a NodeGroup containing the given node. The associated nodes will
      * also be added to the NodeGroup.
      * @returns a pointer to the NodeGroup if one was created, or a pointer to the existing one containing that node
      */
     NodeGroup *createNodeGroup(Node *node);
     /**
      * Finds (and deletes if found) the NodeGroup containing the given node.
      * @returns true if the NodeGroup was found and deleted
      */
     bool deleteNodeGroup(Node *node);
 
     friend class CanvasEditor;
 
     /**
      *        deletes all the elements containde in the nodeList. Should be overridden.
      */
     virtual void deleteAllNodes() = 0;
 
     /**
      *        Selects all nodes on the document. Should be overridden.
      */
     virtual void selectAllNodes() = 0;
 
     // this should be overridden in {Flow|Circuit}ICNDocument
     ConnectorList m_connectorList;
     CNItemGroup *m_selectList; // Selected objects
 
     // OVERLOADED
     KtlQCanvasItemList m_itemDeleteList; // List of canvas items to be deleted
 
 private:
     Cells *m_cells;
     GuardedNodeGroupList m_nodeGroupList;
 };
 
 /**
 @author David Saxton
 */
 class DirCursor
 {
 public:
     static DirCursor *self();
     ~DirCursor();
 
     static QPixmap leftArrow()
     {
         return self()->m_leftArrow;
     }
 
     static QPixmap rightArrow()
     {
         return self()->m_rightArrow;
     }
 
     static QPixmap upArrow()
     {
         return self()->m_upArrow;
     }
 
     static QPixmap downArrow()
     {
         return self()->m_downArrow;
     }
 
 protected:
     DirCursor();
     void initCursors();
 
     static DirCursor *m_self;
     QPixmap m_leftArrow;
     QPixmap m_rightArrow;
     QPixmap m_upArrow;
     QPixmap m_downArrow;
 };
 
 #endif