1 #ifndef __SP_ITEM_H__
2 #define __SP_ITEM_H__
4 /** \file
5 * Some things pertinent to all visible shapes: SPItem, SPItemView, SPItemCtx, SPItemClass, SPEvent.
6 */
8 /*
9 * Authors:
10 * Lauris Kaplinski <lauris@kaplinski.com>
11 * bulia byak <buliabyak@users.sf.net>
12 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
13 *
14 * Copyright (C) 1999-2006 authors
15 * Copyright (C) 2001-2002 Ximian, Inc.
16 * Copyright (C) 2004 Monash University
17 *
18 * Released under GNU GPL, read the file 'COPYING' for more information
19 */
20 #include <vector>
22 #include "display/nr-arena-forward.h"
23 #include "sp-object.h"
24 #include <2geom/matrix.h>
25 #include <libnr/nr-rect.h>
26 #include <2geom/forward.h>
27 #include <libnr/nr-convert2geom.h>
28 #include <snap-preferences.h>
30 class SPGuideConstraint;
31 struct SPClipPathReference;
32 struct SPMaskReference;
33 struct SPAvoidRef;
34 struct SPPrintContext;
35 namespace Inkscape { class URIReference; }
37 enum {
38 SP_EVENT_INVALID,
39 SP_EVENT_NONE,
40 SP_EVENT_ACTIVATE,
41 SP_EVENT_MOUSEOVER,
42 SP_EVENT_MOUSEOUT
43 };
45 /**
46 * Event structure.
47 *
48 * \todo This is just placeholder. Plan:
49 * We do extensible event structure, that hold applicable (ui, non-ui)
50 * data pointers. So it is up to given object/arena implementation
51 * to process correct ones in meaningful way.
52 * Also, this probably goes to SPObject base class.
53 *
54 */
55 struct SPEvent {
56 unsigned int type;
57 gpointer data;
58 };
60 /// SPItemView
61 struct SPItemView {
62 SPItemView *next;
63 unsigned int flags;
64 unsigned int key;
65 NRArenaItem *arenaitem;
66 };
68 /* flags */
70 #define SP_ITEM_BBOX_VISUAL 1
72 #define SP_ITEM_SHOW_DISPLAY (1 << 0)
74 /**
75 * Flag for referenced views (i.e. markers, clippaths, masks and patterns);
76 currently unused, does the same as DISPLAY
77 */
78 #define SP_ITEM_REFERENCE_FLAGS (1 << 1)
80 /// Contains transformations to document/viewport and the viewport size.
81 struct SPItemCtx {
82 SPCtx ctx;
83 /** Item to document transformation */
84 Geom::Matrix i2doc;
85 /** Viewport size */
86 NRRect vp;
87 /** Item to viewport transformation */
88 Geom::Matrix i2vp;
89 };
91 /** Abstract base class for all visible shapes. */
92 struct SPItem : public SPObject {
93 enum BBoxType {
94 // legacy behavior: includes crude stroke, markers; excludes long miters, blur margin; is known to be wrong for caps
95 APPROXIMATE_BBOX,
96 // includes only the bare path bbox, no stroke, no nothing
97 GEOMETRIC_BBOX,
98 // includes everything: correctly done stroke (with proper miters and caps), markers, filter margins (e.g. blur)
99 RENDERING_BBOX
100 };
102 unsigned int sensitive : 1;
103 unsigned int stop_paint: 1;
104 double transform_center_x;
105 double transform_center_y;
107 Geom::Matrix transform;
109 SPClipPathReference *clip_ref;
110 SPMaskReference *mask_ref;
112 // Used for object-avoiding connectors
113 SPAvoidRef *avoidRef;
115 SPItemView *display;
117 std::vector<SPGuideConstraint> constraints;
119 sigc::signal<void, Geom::Matrix const *, SPItem *> _transformed_signal;
121 void init();
122 bool isLocked() const;
123 void setLocked(bool lock);
125 bool isHidden() const;
126 void setHidden(bool hidden);
128 bool isEvaluated() const;
129 void setEvaluated(bool visible);
130 void resetEvaluated();
132 bool isHidden(unsigned display_key) const;
134 bool isExplicitlyHidden() const;
136 void setExplicitlyHidden(bool val);
138 void setCenter(Geom::Point object_centre);
139 void unsetCenter();
140 bool isCenterSet();
141 Geom::Point getCenter() const;
143 bool isVisibleAndUnlocked() const;
145 bool isVisibleAndUnlocked(unsigned display_key) const;
147 Geom::Matrix getRelativeTransform(SPObject const *obj) const;
149 void raiseOne();
150 void lowerOne();
151 void raiseToTop();
152 void lowerToBottom();
154 Geom::OptRect getBounds(Geom::Matrix const &transform, BBoxType type=APPROXIMATE_BBOX, unsigned int dkey=0) const;
156 sigc::connection _clip_ref_connection;
157 sigc::connection _mask_ref_connection;
159 sigc::connection connectTransformed(sigc::slot<void, Geom::Matrix const *, SPItem *> slot) {
160 return _transformed_signal.connect(slot);
161 }
163 private:
164 enum EvaluatedStatus
165 {
166 StatusUnknown, StatusCalculated, StatusSet
167 };
169 mutable bool _is_evaluated;
170 mutable EvaluatedStatus _evaluated_status;
171 };
173 typedef std::back_insert_iterator<std::vector<Geom::Point> > SnapPointsIter;
175 /// The SPItem vtable.
176 struct SPItemClass {
177 SPObjectClass parent_class;
179 /** BBox union in given coordinate system */
180 void (* bbox) (SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags);
182 /** Printing method. Assumes ctm is set to item affine matrix */
183 /* \todo Think about it, and maybe implement generic export method instead (Lauris) */
184 void (* print) (SPItem *item, SPPrintContext *ctx);
186 /** Give short description of item (for status display) */
187 gchar * (* description) (SPItem * item);
189 NRArenaItem * (* show) (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
190 void (* hide) (SPItem *item, unsigned int key);
192 /** Write to an iterator the points that should be considered for snapping
193 * as the item's `nodes'.
194 */
195 void (* snappoints) (SPItem const *item, SnapPointsIter p, Inkscape::SnapPreferences const *snapprefs);
197 /** Apply the transform optimally, and return any residual transformation */
198 Geom::Matrix (* set_transform)(SPItem *item, Geom::Matrix const &transform);
200 /** Convert the item to guidelines */
201 void (* convert_to_guides)(SPItem *item);
203 /** Emit event, if applicable */
204 gint (* event) (SPItem *item, SPEvent *event);
205 };
207 /* Flag testing macros */
209 #define SP_ITEM_STOP_PAINT(i) (SP_ITEM (i)->stop_paint)
211 /* Methods */
213 void sp_item_invoke_bbox(SPItem const *item, Geom::OptRect &bbox, Geom::Matrix const &transform, unsigned const clear, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
214 void sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const clear, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX) __attribute__ ((deprecated));
215 void sp_item_invoke_bbox_full(SPItem const *item, Geom::OptRect &bbox, Geom::Matrix const &transform, unsigned const flags, unsigned const clear);
216 void sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags, unsigned const clear) __attribute__ ((deprecated));
218 unsigned sp_item_pos_in_parent(SPItem *item);
220 gchar *sp_item_description(SPItem * item);
221 void sp_item_invoke_print(SPItem *item, SPPrintContext *ctx);
223 /** Shows/Hides item on given arena display list */
224 unsigned int sp_item_display_key_new(unsigned int numkeys);
225 NRArenaItem *sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
226 void sp_item_invoke_hide(SPItem *item, unsigned int key);
228 void sp_item_snappoints(SPItem const *item, SnapPointsIter p, Inkscape::SnapPreferences const *snapprefs);
230 void sp_item_adjust_pattern(SPItem *item, /* Geom::Matrix const &premul, */ Geom::Matrix const &postmul, bool set = false);
231 void sp_item_adjust_gradient(SPItem *item, /* Geom::Matrix const &premul, */ Geom::Matrix const &postmul, bool set = false);
232 void sp_item_adjust_stroke(SPItem *item, gdouble ex);
233 void sp_item_adjust_stroke_width_recursive(SPItem *item, gdouble ex);
234 void sp_item_adjust_paint_recursive(SPItem *item, Geom::Matrix advertized_transform, Geom::Matrix t_ancestors, bool is_pattern);
235 void sp_item_adjust_livepatheffect(SPItem *item, Geom::Matrix const &postmul, bool set = false);
237 void sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, Geom::Matrix const &transform, Geom::Matrix const *adv = NULL, bool compensate = true);
239 void sp_item_set_item_transform(SPItem *item, Geom::Matrix const &transform);
241 void sp_item_convert_item_to_guides(SPItem *item);
243 gint sp_item_event (SPItem *item, SPEvent *event);
245 /* Utility */
247 NRArenaItem *sp_item_get_arenaitem(SPItem *item, unsigned int key);
249 void sp_item_bbox_desktop(SPItem *item, NRRect *bbox, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX) __attribute__ ((deprecated));
250 Geom::OptRect sp_item_bbox_desktop(SPItem *item, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
252 Geom::Matrix i2anc_affine(SPObject const *item, SPObject const *ancestor);
253 Geom::Matrix i2i_affine(SPObject const *src, SPObject const *dest);
255 Geom::Matrix sp_item_i2doc_affine(SPItem const *item);
257 /* fixme: - these are evil, but OK */
259 /* Fill *TRANSFORM with the item-to-desktop transform. See doc/coordinates.txt
260 * for a description of `Desktop coordinates'; though see also mental's comment
261 * at the top of that file.
262 *
263 * \return TRANSFORM.
264 */
265 Geom::Matrix sp_item_i2d_affine(SPItem const *item);
266 void sp_item_set_i2d_affine(SPItem *item, Geom::Matrix const &transform);
267 Geom::Matrix sp_item_dt2i_affine(SPItem const *item);
268 int sp_item_repr_compare_position(SPItem *first, SPItem *second);
269 SPItem *sp_item_first_item_child (SPObject *obj);
271 void sp_item_convert_to_guides(SPItem *item);
273 #endif
275 /*
276 Local Variables:
277 mode:c++
278 c-file-style:"stroustrup"
279 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
280 indent-tabs-mode:nil
281 fill-column:99
282 End:
283 */
284 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :