#ifndef SEEN_KNOT_HOLDER_ENTITY_H #define SEEN_KNOT_HOLDER_ENTITY_H /** \file * KnotHolderEntity definition. * * Authors: * Mitsuru Oka <oka326@parkcity.ne.jp> * Maximilian Albert <maximilian.albert@gmail.com> * * Copyright (C) 1999-2001 Lauris Kaplinski * Copyright (C) 2000-2001 Ximian, Inc. * Copyright (C) 2001 Mitsuru Oka * Copyright (C) 2004 Monash University * Copyright (C) 2008 Maximilian Albert * * Released under GNU GPL */ #include <glib/gtypes.h> #include "knot.h" #include <2geom/forward.h> #include "snapper.h" struct SPItem; struct SPKnot; class SPDesktop; class KnotHolder; typedef void (* SPKnotHolderSetFunc) (SPItem *item, Geom::Point const &p, Geom::Point const &origin, guint state); typedef Geom::Point (* SPKnotHolderGetFunc) (SPItem *item); /* fixme: Think how to make callbacks most sensitive (Lauris) */ typedef void (* SPKnotHolderReleasedFunc) (SPItem *item); 00036 class KnotHolderEntity { public: KnotHolderEntity() {} virtual ~KnotHolderEntity(); virtual void create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip = "", SPKnotShapeType shape = SP_KNOT_SHAPE_DIAMOND, SPKnotModeType mode = SP_KNOT_MODE_XOR, guint32 color = 0xffffff00); /* derived classes used for LPE knotholder handles use this to indicate that they must not be deleted when a knotholder is destroyed */ // TODO: it would be nice to ditch this but then we need to dynamically create instances of different // KnotHolderEntity classes in Effect::addKnotHolderEntities. How to do this??? virtual bool isDeletable() { return true; } /* the get/set/click handlers are virtual functions; each handler class for a knot should be derived from KnotHolderEntity and override these functions */ virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state) = 0; virtual Geom::Point knot_get() = 0; virtual void knot_click(guint /*state*/) {} void update_knot(); //private: Geom::Point snap_knot_position(Geom::Point const &p); Geom::Point snap_knot_position_constrained(Geom::Point const &p, Inkscape::Snapper::ConstraintLine const &constraint); SPKnot *knot; SPItem *item; SPDesktop *desktop; KnotHolder *parent_holder; int my_counter; static int counter; /** Connection to \a knot's "moved" signal. */ 00073 guint handler_id; /** Connection to \a knot's "clicked" signal. */ 00075 guint _click_handler_id; /** Connection to \a knot's "ungrabbed" signal. */ 00077 guint _ungrab_handler_id; sigc::connection _moved_connection; sigc::connection _click_connection; sigc::connection _ungrabbed_connection; }; // derived KnotHolderEntity class for LPEs 00085 class LPEKnotHolderEntity : public KnotHolderEntity { virtual bool isDeletable() { return false; } }; /* pattern manipulation */ 00091 class PatternKnotHolderEntityXY : public KnotHolderEntity { public: virtual Geom::Point knot_get(); virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state); }; 00097 class PatternKnotHolderEntityAngle : public KnotHolderEntity { public: virtual Geom::Point knot_get(); virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state); }; 00103 class PatternKnotHolderEntityScale : public KnotHolderEntity { public: virtual Geom::Point knot_get(); virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state); }; #endif /* !SEEN_KNOT_HOLDER_ENTITY_H */ /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :