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Diffstat (limited to 'src/resizeoverlay.h')
| -rw-r--r-- | src/resizeoverlay.h | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/src/resizeoverlay.h b/src/resizeoverlay.h new file mode 100644 index 0000000..c71e6de --- /dev/null +++ b/src/resizeoverlay.h @@ -0,0 +1,276 @@ +/*************************************************************************** + * Copyright (C) 2005 by David Saxton * + * [email protected] * + * * + * 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 RESIZEOVERLAY_H +#define RESIZEOVERLAY_H + +// This file contains class definitions for different types of resizing and rotating + +#include <qcanvas.h> +#include <qguardedptr.h> +#include <qmap.h> +#include <qobject.h> +#include <qvaluelist.h> + +class MechanicsItem; +class ResizeHandle; +class ResizeOverlay; +class QEvent; + +typedef QMap< int, QGuardedPtr<ResizeHandle> > ResizeHandleMap; + +/** +@author David Saxton +*/ +class ResizeHandle : public QObject, public QCanvasRectangle +{ + Q_OBJECT +public: + /** + * Convenience enumeration for resize handle positioning. Note: this class + * does not make use of the values in this enumeration - it is just + * provided here for use by other classes. + */ + enum ResizeHandlePosition + { + rhp_none, + rhp_topLeft, + rhp_topMiddle, + rhp_topRight, + rhp_middleRight, + rhp_bottomRight, + rhp_bottomMiddle, + rhp_bottomLeft, + rhp_middleLeft, + rhp_center, + rhp_start, + rhp_end + }; + + enum DrawType + { + // Draws a simple rectangle + dt_point_rect, + + // Crosshair + dt_point_crosshair, + + // Straight arrows in various directions + dt_resize_forwardsDiagonal, + dt_resize_backwardsDiagonal, + dt_resize_vertical, + dt_resize_horizontal, + + // Arrows as part of an arc + dt_rotate_topLeft, + dt_rotate_topRight, + dt_rotate_bottomRight, + dt_rotate_bottomLeft + }; + + ResizeHandle( ResizeOverlay *resizeOverlay, int id, DrawType drawType, int xsnap, int ysnap ); + ~ResizeHandle(); + + int id() const { return m_id; } + int rtti() const; + + void setDrawType( DrawType drawType ); + void moveRH( double x, double y ); + void setHover( bool hover ); + + static const QPixmap& handlePixmap( DrawType drawType, bool hover ); + + virtual QPointArray areaPoints () const; + +public slots: + void slotMoveByX( double dx ) { moveBy( dx, 0 ); } + void slotMoveByY( double dy ) { moveBy( 0, dy ); } + +signals: + void rhMovedBy( int id, double dx, double dy ); + void rhMovedByX( double dx ); + void rhMovedByY( double dy ); + +protected: + virtual void drawShape( QPainter &p ); + DrawType m_drawType; + bool b_hover; // If true, then paint resize handle for mouse hovering over + int m_id; + int m_xsnap; + int m_ysnap; + ResizeOverlay *p_resizeOverlay; + +}; +typedef QValueList<ResizeHandle*> ResizeHandleList; + +/** +@author David Saxton +*/ +class ResizeOverlay : public QObject +{ + Q_OBJECT +public: + ResizeOverlay( Item *parent ); + ~ResizeOverlay(); + + Item *parentItem() const { return p_item; } + + /** + * Shows / hides the resize handles. They are hidden by default. + */ + void showResizeHandles( bool show ); + /** + * Sets the visibility. Visibility is true by default. + */ + void setVisible( bool visible ); + /** + * Reinherit this function to determine whether the X coordinate of the spot + * that the resize handle has moved into is valid or not + */ + virtual bool isValidXPos( ResizeHandle *rh ) { Q_UNUSED(rh); return true; } + /** + * Reinherit this function to determine whether the Y coordinate of the spot + * that the resize handle has moved into is valid or not + */ + virtual bool isValidYPos( ResizeHandle *rh ) { Q_UNUSED(rh); return true; } + +public slots: + void slotMoveAllResizeHandles( double dx, double dy ); + +protected slots: + virtual void slotResizeHandleMoved( int id, double dx, double dy ) = 0; + +protected: + /** + * Connects up the given resize handles so that they are always kept at the + * same horizontal coordinate + */ + void syncX( ResizeHandle *rh1, ResizeHandle *rh2 ); + void syncX( ResizeHandle *rh1, ResizeHandle *rh2, ResizeHandle *rh3 ); + /** + * Connects up the given resize handles so that they are always kept at the + * same vertical coordinate + */ + void syncY( ResizeHandle *rh1, ResizeHandle *rh2 ); + void syncY( ResizeHandle *rh1, ResizeHandle *rh2, ResizeHandle *rh3 ); + /** + * Returns a pointer to the ResizeHandle with the given id, or 0 if no such + * handle exists + */ + ResizeHandle *resizeHandle( int id ); + /** + * Creates and attaches the resize handle with the given DrawType. If a + * ResizeHandle with the given id exists, will return a pointer to that + * instead + */ + ResizeHandle *createResizeHandle( int id, ResizeHandle::DrawType drawType, int xsnap = 1, int ysnap = 1 ); + /** + * Removes the resize handle with the given id + */ + void removeResizeHandle( int id ); + + Item *p_item; + ResizeHandleMap m_resizeHandleMap; + bool b_showResizeHandles; + bool b_visible; +}; + + +/** +@author David Saxton +*/ +class MechanicsItemOverlay : public ResizeOverlay +{ +Q_OBJECT +public: + MechanicsItemOverlay( MechanicsItem *parent ); + ~MechanicsItemOverlay(); + +public slots: + void slotUpdateResizeHandles(); + +protected slots: + virtual void slotResizeHandleMoved( int id, double dx, double dy ); + +protected: + ResizeHandle *m_tl; + ResizeHandle *m_tm; + ResizeHandle *m_tr; + ResizeHandle *m_mr; + ResizeHandle *m_br; + ResizeHandle *m_bm; + ResizeHandle *m_bl; + ResizeHandle *m_ml; + ResizeHandle *m_mm; + MechanicsItem *p_mechanicsItem; +}; + + +/** +@author David Saxton +*/ +class RectangularOverlay : public ResizeOverlay +{ +Q_OBJECT +public: + RectangularOverlay( Item *item, int xsnap = 1, int ysnap = 1 ); + void removeTopMiddle(); + void removeBotMiddle(); + /** + * Get the size rectangle from the position of the handles. If the size + * is invalid (e.g. the parent Item does not consider it a valid size, + * then *ok is set to false; otherwise to true. + * @returns the sizerect, regardless of whether or not it is valid + */ + QRect getSizeRect( bool *ok = 0l, bool *widthOk = 0l, bool *heightOk = 0l ) const; + virtual bool isValidXPos( ResizeHandle *rh ); + virtual bool isValidYPos( ResizeHandle *rh ); + +public slots: + void slotUpdateResizeHandles(); + +protected slots: + virtual void slotResizeHandleMoved( int id, double dx, double dy ); + +protected: + ResizeHandle *m_tl; + ResizeHandle *m_tm; + ResizeHandle *m_tr; + ResizeHandle *m_mr; + ResizeHandle *m_br; + ResizeHandle *m_bm; + ResizeHandle *m_bl; + ResizeHandle *m_ml; +}; + + +/** +@author David Saxton +*/ +class LineOverlay : public ResizeOverlay +{ + Q_OBJECT + public: + LineOverlay( Item * parent ); + QPoint startPoint() const; + QPoint endPoint() const; + + public slots: + void slotUpdateResizeHandles(); + + protected slots: + virtual void slotResizeHandleMoved( int id, double dx, double dy ); + + protected: + ResizeHandle * m_pStart; + ResizeHandle * m_pEnd; +}; + +#endif |