File indexing completed on 2024-10-13 10:59:28

 /***************************************************************************
  *   Copyright (C) 2005-2006 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 ITEMVIEW_H
 #define ITEMVIEW_H
 
 #include <view.h>
 
 #include <QPointer>
 #include <canvas.h>
 
 class Canvas;
 class CVBEditor;
 class Item;
 class ItemDocument;
 class QTimer;
 
 /**
 @author David Saxton
 */
 class ItemView : public View
 {
     Q_OBJECT
 public:
     ItemView(ItemDocument *itemDocument, ViewContainer *viewContainer, uint viewAreaId);
     ~ItemView() override;
 
     bool canZoomIn() const override;
     bool canZoomOut() const override;
     CVBEditor *cvbEditor() const
     {
         return m_CVBEditor;
     }
     /**
      * @returns The zoom level
      */
     double zoomLevel() const
     {
         return m_zoomLevel;
     }
     /**
      * When the user drags from an item selector into the item view, the
      * item will be created and shown to the user. This function returns
      * that item.
      */
     Item *dragItem() const
     {
         return m_pDragItem;
     }
     /**
      * Zoom in. The point center will remain fixed.
      */
     void zoomIn(const QPoint &center);
     /**
      * Zoom in. The point center will remain fixed.
      */
     void zoomOut(const QPoint &center);
     /**
      * Converts a mouse click position (in the contents coordinates) to the
      * associated position on the canvas.
      */
     QPoint mousePosToCanvasPos(const QPoint &contentsClick) const;
 
 public slots:
     void actualSize() override;
     void zoomIn();
     void zoomOut();
     void scrollToMouse(const QPoint &pos);
     virtual void updateStatus();
 
 protected slots:
     /**
      * Called when the user changes the configuration.
      */
     void slotUpdateConfiguration() override;
     void startUpdatingStatus();
     void stopUpdatingStatus();
 
 protected:
     /**
      * If the user drags an acceptable item in (e.g. a component in a
      * circuit), then call this function to create the item and have it
      * moved when the user moves his mouse while dragging.
      */
     void createDragItem(QDragEnterEvent *event);
     void removeDragItem();
     void updateZoomActions();
 
 public:
     /**
      * Attempts to create a new CNItem if one was dragged onto the canvas
      */
     void dropEvent(QDropEvent *event) override;
     /**
      * Reinherit to allow different types of items to be dragged in.
      */
     void dragEnterEvent(QDragEnterEvent *event) override;
     void dragLeaveEvent(QDragLeaveEvent *event) override;
     void dragMoveEvent(QDragMoveEvent *event) override;
     void contentsMousePressEvent(QMouseEvent *e);
     void contentsMouseReleaseEvent(QMouseEvent *e);
     void contentsMouseDoubleClickEvent(QMouseEvent *e);
     void contentsMouseMoveEvent(QMouseEvent *e);
     void contentsWheelEvent(QWheelEvent *e);
     void enterEvent(QEvent *e) override;
     void leaveEvent(QEvent *e) override;
 
     void requestDocumentResizeToCanvasItems();
 
 protected:
     QPointer<ItemDocument> p_itemDocument;
     CVBEditor *m_CVBEditor;
     double m_zoomLevel;
     QTimer *m_pUpdateStatusTmr;
     Item *m_pDragItem;
 
     // friend class CVBEditor; // 2018.09.26
 };
 
 /**
 @author David Saxton
 */
 class CVBEditor : public KtlQCanvasView
 {
     Q_OBJECT
 public:
     CVBEditor(Canvas *canvas, ItemView *itemView);
 
     void setPassEventsToView(bool pass)
     {
         b_passEventsToView = pass;
     }
     bool event(QEvent *e) override;
     void contentsWheelEvent(QWheelEvent *e) override;
     /**
      * Updates the world matrix from ItmeView's zoom level and from Canvas'
      * offset.
      */
     void updateWorldMatrix();
 
 protected slots:
     void canvasResized(const QRect &oldSize, const QRect &newSize);
 
 protected:
     void viewportResizeEvent(QResizeEvent *) override;
     ItemView *p_itemView;
     bool b_passEventsToView;
     bool b_ignoreEvents;
     Canvas *m_pCanvas;
 };
 
 #endif