File indexing completed on 2024-05-19 09:39:44

0001 /***************************************************************************
0002  *   Copyright (C) 2005-2006 David Saxton                                  *
0003  *   david@bluehaze.org                                                    *
0004  *                                                                         *
0005  *   This program is free software; you can redistribute it and/or modify  *
0006  *   it under the terms of the GNU General Public License as published by  *
0007  *   the Free Software Foundation; either version 2 of the License, or     *
0008  *   (at your option) any later version.                                   *
0009  ***************************************************************************/
0010 
0011 #ifndef ITEMVIEW_H
0012 #define ITEMVIEW_H
0013 
0014 #include <view.h>
0015 
0016 #include <QPointer>
0017 #include <canvas.h>
0018 
0019 class Canvas;
0020 class CVBEditor;
0021 class Item;
0022 class ItemDocument;
0023 class QTimer;
0024 
0025 /**
0026 @author David Saxton
0027 */
0028 class ItemView : public View
0029 {
0030     Q_OBJECT
0031 public:
0032     ItemView(ItemDocument *itemDocument, ViewContainer *viewContainer, uint viewAreaId);
0033     ~ItemView() override;
0034 
0035     bool canZoomIn() const override;
0036     bool canZoomOut() const override;
0037     CVBEditor *cvbEditor() const
0038     {
0039         return m_CVBEditor;
0040     }
0041     /**
0042      * @returns The zoom level
0043      */
0044     double zoomLevel() const
0045     {
0046         return m_zoomLevel;
0047     }
0048     /**
0049      * When the user drags from an item selector into the item view, the
0050      * item will be created and shown to the user. This function returns
0051      * that item.
0052      */
0053     Item *dragItem() const
0054     {
0055         return m_pDragItem;
0056     }
0057     /**
0058      * Zoom in. The point center will remain fixed.
0059      */
0060     void zoomIn(const QPoint &center);
0061     /**
0062      * Zoom in. The point center will remain fixed.
0063      */
0064     void zoomOut(const QPoint &center);
0065     /**
0066      * Converts a mouse click position (in the contents coordinates) to the
0067      * associated position on the canvas.
0068      */
0069     QPoint mousePosToCanvasPos(const QPoint &contentsClick) const;
0070 
0071 public slots:
0072     void actualSize() override;
0073     void zoomIn();
0074     void zoomOut();
0075     void scrollToMouse(const QPoint &pos);
0076     virtual void updateStatus();
0077 
0078 protected slots:
0079     /**
0080      * Called when the user changes the configuration.
0081      */
0082     void slotUpdateConfiguration() override;
0083     void startUpdatingStatus();
0084     void stopUpdatingStatus();
0085 
0086 protected:
0087     /**
0088      * If the user drags an acceptable item in (e.g. a component in a
0089      * circuit), then call this function to create the item and have it
0090      * moved when the user moves his mouse while dragging.
0091      */
0092     void createDragItem(QDragEnterEvent *event);
0093     void removeDragItem();
0094     void updateZoomActions();
0095 
0096 public:
0097     /**
0098      * Attempts to create a new CNItem if one was dragged onto the canvas
0099      */
0100     void dropEvent(QDropEvent *event) override;
0101     /**
0102      * Reinherit to allow different types of items to be dragged in.
0103      */
0104     void dragEnterEvent(QDragEnterEvent *event) override;
0105     void dragLeaveEvent(QDragLeaveEvent *event) override;
0106     void dragMoveEvent(QDragMoveEvent *event) override;
0107     void contentsMousePressEvent(QMouseEvent *e);
0108     void contentsMouseReleaseEvent(QMouseEvent *e);
0109     void contentsMouseDoubleClickEvent(QMouseEvent *e);
0110     void contentsMouseMoveEvent(QMouseEvent *e);
0111     void contentsWheelEvent(QWheelEvent *e);
0112     void enterEvent(QEvent *e) override;
0113     void leaveEvent(QEvent *e) override;
0114 
0115     void requestDocumentResizeToCanvasItems();
0116 
0117 protected:
0118     QPointer<ItemDocument> p_itemDocument;
0119     CVBEditor *m_CVBEditor;
0120     double m_zoomLevel;
0121     QTimer *m_pUpdateStatusTmr;
0122     Item *m_pDragItem;
0123 
0124     // friend class CVBEditor; // 2018.09.26
0125 };
0126 
0127 /**
0128 @author David Saxton
0129 */
0130 class CVBEditor : public KtlQCanvasView
0131 {
0132     Q_OBJECT
0133 public:
0134     CVBEditor(Canvas *canvas, ItemView *itemView);
0135 
0136     void setPassEventsToView(bool pass)
0137     {
0138         b_passEventsToView = pass;
0139     }
0140     bool event(QEvent *e) override;
0141     void contentsWheelEvent(QWheelEvent *e) override;
0142     /**
0143      * Updates the world matrix from ItmeView's zoom level and from Canvas'
0144      * offset.
0145      */
0146     void updateWorldMatrix();
0147 
0148 protected slots:
0149     void canvasResized(const QRect &oldSize, const QRect &newSize);
0150 
0151 protected:
0152     void viewportResizeEvent(QResizeEvent *) override;
0153     ItemView *p_itemView;
0154     bool b_passEventsToView;
0155     bool b_ignoreEvents;
0156     Canvas *m_pCanvas;
0157 };
0158 
0159 #endif