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 <libnr/nr-matrix.h>
25 #include <libnr/nr-rect.h>
26 #include <2geom/forward.h>
27 #include <libnr/nr-convert2geom.h>
29 class SPGuideConstraint;
30 struct SPClipPathReference;
31 struct SPMaskReference;
32 struct SPAvoidRef;
33 struct SPPrintContext;
34 namespace Inkscape { class URIReference; }
36 enum {
37 SP_EVENT_INVALID,
38 SP_EVENT_NONE,
39 SP_EVENT_ACTIVATE,
40 SP_EVENT_MOUSEOVER,
41 SP_EVENT_MOUSEOUT
42 };
44 /**
45 * Event structure.
46 *
47 * \todo This is just placeholder. Plan:
48 * We do extensible event structure, that hold applicable (ui, non-ui)
49 * data pointers. So it is up to given object/arena implementation
50 * to process correct ones in meaningful way.
51 * Also, this probably goes to SPObject base class.
52 *
53 */
54 struct SPEvent {
55 unsigned int type;
56 gpointer data;
57 };
59 class SPItemView;
61 /// SPItemView
62 struct SPItemView {
63 SPItemView *next;
64 unsigned int flags;
65 unsigned int key;
66 NRArenaItem *arenaitem;
67 };
69 /* flags */
71 #define SP_ITEM_BBOX_VISUAL 1
73 #define SP_ITEM_SHOW_DISPLAY (1 << 0)
75 /**
76 * Flag for referenced views (i.e. markers, clippaths, masks and patterns);
77 currently unused, does the same as DISPLAY
78 */
79 #define SP_ITEM_REFERENCE_FLAGS (1 << 1)
81 class SPItemCtx;
83 /// Contains transformations to document/viewport and the viewport size.
84 struct SPItemCtx {
85 SPCtx ctx;
86 /** Item to document transformation */
87 NR::Matrix i2doc;
88 /** Viewport size */
89 NRRect vp;
90 /** Item to viewport transformation */
91 NR::Matrix i2vp;
92 };
94 /** Abstract base class for all visible shapes. */
95 struct SPItem : public SPObject {
96 enum BBoxType {
97 // legacy behavior: includes crude stroke, markers; excludes long miters, blur margin; is known to be wrong for caps
98 APPROXIMATE_BBOX,
99 // includes only the bare path bbox, no stroke, no nothing
100 GEOMETRIC_BBOX,
101 // includes everything: correctly done stroke (with proper miters and caps), markers, filter margins (e.g. blur)
102 RENDERING_BBOX
103 };
105 unsigned int sensitive : 1;
106 unsigned int stop_paint: 1;
107 double transform_center_x;
108 double transform_center_y;
110 NR::Matrix transform;
112 SPClipPathReference *clip_ref;
113 SPMaskReference *mask_ref;
115 // Used for object-avoiding connectors
116 SPAvoidRef *avoidRef;
118 SPItemView *display;
120 std::vector<SPGuideConstraint> constraints;
122 sigc::signal<void, NR::Matrix const *, SPItem *> _transformed_signal;
124 void init();
125 bool isLocked() const;
126 void setLocked(bool lock);
128 bool isHidden() const;
129 void setHidden(bool hidden);
131 bool isEvaluated() const;
132 void setEvaluated(bool visible);
133 void resetEvaluated();
135 bool isHidden(unsigned display_key) const;
137 bool isExplicitlyHidden() const;
139 void setExplicitlyHidden(bool val);
141 void setCenter(NR::Point object_centre);
142 void unsetCenter();
143 bool isCenterSet();
144 NR::Point getCenter() const;
146 bool isVisibleAndUnlocked() const;
148 bool isVisibleAndUnlocked(unsigned display_key) const;
150 NR::Matrix getRelativeTransform(SPObject const *obj) const;
152 void raiseOne();
153 void lowerOne();
154 void raiseToTop();
155 void lowerToBottom();
157 NR::Maybe<NR::Rect> getBounds(NR::Matrix const &transform, BBoxType type=APPROXIMATE_BBOX, unsigned int dkey=0) const;
158 NR::Maybe<Geom::Rect> getBounds(Geom::Matrix const &transform, BBoxType type=APPROXIMATE_BBOX, unsigned int dkey=0) const;
160 sigc::connection _clip_ref_connection;
161 sigc::connection _mask_ref_connection;
163 sigc::connection connectTransformed(sigc::slot<void, NR::Matrix const *, SPItem *> slot) {
164 return _transformed_signal.connect(slot);
165 }
167 private:
168 enum EvaluatedStatus
169 {
170 StatusUnknown, StatusCalculated, StatusSet
171 };
173 mutable bool _is_evaluated;
174 mutable EvaluatedStatus _evaluated_status;
175 };
177 typedef std::back_insert_iterator<std::vector<NR::Point> > SnapPointsIter;
179 /// The SPItem vtable.
180 struct SPItemClass {
181 SPObjectClass parent_class;
183 /** BBox union in given coordinate system */
184 void (* bbox) (SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
186 /** Printing method. Assumes ctm is set to item affine matrix */
187 /* \todo Think about it, and maybe implement generic export method instead (Lauris) */
188 void (* print) (SPItem *item, SPPrintContext *ctx);
190 /** Give short description of item (for status display) */
191 gchar * (* description) (SPItem * item);
193 NRArenaItem * (* show) (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
194 void (* hide) (SPItem *item, unsigned int key);
196 /** Write to an iterator the points that should be considered for snapping
197 * as the item's `nodes'.
198 */
199 void (* snappoints) (SPItem const *item, SnapPointsIter p);
201 /** Apply the transform optimally, and return any residual transformation */
202 NR::Matrix (* set_transform)(SPItem *item, NR::Matrix const &transform);
204 /** Convert the item to guidelines */
205 void (* convert_to_guides)(SPItem *item);
207 /** Emit event, if applicable */
208 gint (* event) (SPItem *item, SPEvent *event);
209 };
211 /* Flag testing macros */
213 #define SP_ITEM_STOP_PAINT(i) (SP_ITEM (i)->stop_paint)
215 /* Methods */
217 void sp_item_invoke_bbox(SPItem const *item, NR::Maybe<NR::Rect> *bbox, NR::Matrix const &transform, unsigned const clear, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
218 void sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX) __attribute__ ((deprecated));
219 void sp_item_invoke_bbox_full(SPItem const *item, NR::Maybe<NR::Rect> *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear);
220 void sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear) __attribute__ ((deprecated));
222 unsigned sp_item_pos_in_parent(SPItem *item);
224 gchar *sp_item_description(SPItem * item);
225 void sp_item_invoke_print(SPItem *item, SPPrintContext *ctx);
227 /** Shows/Hides item on given arena display list */
228 unsigned int sp_item_display_key_new(unsigned int numkeys);
229 NRArenaItem *sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
230 void sp_item_invoke_hide(SPItem *item, unsigned int key);
232 void sp_item_snappoints(SPItem const *item, bool includeItemCenter, SnapPointsIter p);
234 void sp_item_adjust_pattern(SPItem *item, /* NR::Matrix const &premul, */ NR::Matrix const &postmul, bool set = false);
235 void sp_item_adjust_gradient(SPItem *item, /* NR::Matrix const &premul, */ NR::Matrix const &postmul, bool set = false);
236 void sp_item_adjust_stroke(SPItem *item, gdouble ex);
237 void sp_item_adjust_stroke_width_recursive(SPItem *item, gdouble ex);
238 void sp_item_adjust_paint_recursive(SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern);
239 void sp_item_adjust_livepatheffect(SPItem *item, NR::Matrix const &postmul, bool set = false);
241 void sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const *transform, NR::Matrix const *adv = NULL);
242 void sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv = NULL, bool compensate = true);
244 void sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform);
246 void sp_item_convert_item_to_guides(SPItem *item);
248 gint sp_item_event (SPItem *item, SPEvent *event);
250 /* Utility */
252 NRArenaItem *sp_item_get_arenaitem(SPItem *item, unsigned int key);
254 void sp_item_bbox_desktop(SPItem *item, NRRect *bbox, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX) __attribute__ ((deprecated));
255 NR::Maybe<NR::Rect> sp_item_bbox_desktop(SPItem *item, SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
257 Geom::Matrix i2anc_affine(SPObject const *item, SPObject const *ancestor);
258 Geom::Matrix i2i_affine(SPObject const *src, SPObject const *dest);
260 Geom::Matrix sp_item_i2doc_affine(SPItem const *item);
261 Geom::Matrix sp_item_i2root_affine(SPItem const *item);
263 Geom::Matrix matrix_to_desktop (Geom::Matrix m, SPItem const *item);
264 Geom::Matrix matrix_from_desktop (Geom::Matrix m, SPItem const *item);
266 /* fixme: - these are evil, but OK */
268 /* Fill *TRANSFORM with the item-to-desktop transform. See doc/coordinates.txt
269 * for a description of `Desktop coordinates'; though see also mental's comment
270 * at the top of that file.
271 *
272 * \return TRANSFORM.
273 */
274 Geom::Matrix sp_item_i2d_affine(SPItem const *item);
275 Geom::Matrix sp_item_i2r_affine(SPItem const *item);
276 void sp_item_set_i2d_affine(SPItem *item, Geom::Matrix const &transform);
277 Geom::Matrix sp_item_dt2i_affine(SPItem const *item);
278 int sp_item_repr_compare_position(SPItem *first, SPItem *second);
279 SPItem *sp_item_first_item_child (SPObject *obj);
281 void sp_item_convert_to_guides(SPItem *item);
283 #endif
285 /*
286 Local Variables:
287 mode:c++
288 c-file-style:"stroustrup"
289 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
290 indent-tabs-mode:nil
291 fill-column:99
292 End:
293 */
294 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :