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 *
13 * Copyright (C) 1999-2005 authors
14 * Copyright (C) 2001-2002 Ximian, Inc.
15 * Copyright (C) 2004 Monash University
16 *
17 * Released under GNU GPL, read the file 'COPYING' for more information
18 */
19 #include <vector>
21 #include "display/nr-arena-forward.h"
22 #include "sp-object.h"
23 #include <libnr/nr-matrix.h>
24 #include <libnr/nr-rect.h>
26 class SPGuideConstraint;
27 struct SPClipPathReference;
28 struct SPMaskReference;
29 struct SPAvoidRef;
30 struct SPPrintContext;
31 namespace Inkscape { class URIReference; }
33 enum {
34 SP_EVENT_INVALID,
35 SP_EVENT_NONE,
36 SP_EVENT_ACTIVATE,
37 SP_EVENT_MOUSEOVER,
38 SP_EVENT_MOUSEOUT
39 };
41 /**
42 * Event structure.
43 *
44 * \todo This is just placeholder. Plan:
45 * We do extensible event structure, that hold applicable (ui, non-ui)
46 * data pointers. So it is up to given object/arena implementation
47 * to process correct ones in meaningful way.
48 * Also, this probably goes to SPObject base class.
49 *
50 */
51 struct SPEvent {
52 unsigned int type;
53 gpointer data;
54 };
56 class SPItemView;
58 /// SPItemView
59 struct SPItemView {
60 SPItemView *next;
61 unsigned int flags;
62 unsigned int key;
63 NRArenaItem *arenaitem;
64 };
66 /* flags */
68 #define SP_ITEM_BBOX_VISUAL 1
70 #define SP_ITEM_SHOW_DISPLAY (1 << 0)
72 /**
73 * Flag for referenced views (i.e. clippaths, masks and patterns); always display
74 */
75 #define SP_ITEM_REFERENCE_FLAGS SP_ITEM_SHOW_DISPLAY
77 class SPItemCtx;
79 /// Contains transformations to document/viewport and the viewport size.
80 struct SPItemCtx {
81 SPCtx ctx;
82 /** Item to document transformation */
83 NR::Matrix i2doc;
84 /** Viewport size */
85 NRRect vp;
86 /** Item to viewport transformation */
87 NR::Matrix i2vp;
88 };
90 /** Abstract base class for all visible shapes. */
91 struct SPItem : public SPObject {
92 unsigned int sensitive : 1;
93 unsigned int stop_paint: 1;
94 double transform_center_x;
95 double transform_center_y;
97 NR::Matrix transform;
99 SPClipPathReference *clip_ref;
100 SPMaskReference *mask_ref;
102 // Used for object-avoiding connectors
103 SPAvoidRef *avoidRef;
105 SPItemView *display;
107 std::vector<SPGuideConstraint> constraints;
109 sigc::signal<void, NR::Matrix const *, SPItem *> _transformed_signal;
111 void init();
112 bool isLocked() const;
113 void setLocked(bool lock);
115 bool isHidden() const;
116 void setHidden(bool hidden);
118 bool isEvaluated() const;
119 void setEvaluated(bool visible);
120 void resetEvaluated();
122 bool isHidden(unsigned display_key) const;
124 bool isExplicitlyHidden() const;
126 void setExplicitlyHidden(bool val);
128 void setCenter(NR::Point object_centre);
129 void unsetCenter();
130 bool isCenterSet();
131 NR::Point getCenter();
133 bool isVisibleAndUnlocked() const;
135 bool isVisibleAndUnlocked(unsigned display_key) const;
137 NR::Matrix getRelativeTransform(SPObject const *obj) const;
139 void raiseOne();
140 void lowerOne();
141 void raiseToTop();
142 void lowerToBottom();
144 NR::Rect invokeBbox(NR::Matrix const &transform) const;
146 sigc::connection _clip_ref_connection;
147 sigc::connection _mask_ref_connection;
149 sigc::connection connectTransformed(sigc::slot<void, NR::Matrix const *, SPItem *> slot) {
150 return _transformed_signal.connect(slot);
151 }
153 private:
154 enum EvaluatedStatus
155 {
156 StatusUnknown, StatusCalculated, StatusSet
157 };
159 mutable bool _is_evaluated;
160 mutable EvaluatedStatus _evaluated_status;
161 };
163 typedef std::back_insert_iterator<std::vector<NR::Point> > SnapPointsIter;
165 /// The SPItem vtable.
166 struct SPItemClass {
167 SPObjectClass parent_class;
169 /** BBox union in given coordinate system */
170 void (* bbox) (SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
172 /** Printing method. Assumes ctm is set to item affine matrix */
173 /* \todo Think about it, and maybe implement generic export method instead (Lauris) */
174 void (* print) (SPItem *item, SPPrintContext *ctx);
176 /** Give short description of item (for status display) */
177 gchar * (* description) (SPItem * item);
179 NRArenaItem * (* show) (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
180 void (* hide) (SPItem *item, unsigned int key);
182 /** Write to an iterator the points that should be considered for snapping
183 * as the item's `nodes'.
184 */
185 void (* snappoints) (SPItem const *item, SnapPointsIter p);
187 /** Apply the transform optimally, and return any residual transformation */
188 NR::Matrix (* set_transform)(SPItem *item, NR::Matrix const &transform);
190 /** Emit event, if applicable */
191 gint (* event) (SPItem *item, SPEvent *event);
192 };
194 /* Flag testing macros */
196 #define SP_ITEM_STOP_PAINT(i) (SP_ITEM (i)->stop_paint)
198 /* Methods */
200 void sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear);
201 void sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear);
203 unsigned sp_item_pos_in_parent(SPItem *item);
205 gchar *sp_item_description(SPItem * item);
206 void sp_item_invoke_print(SPItem *item, SPPrintContext *ctx);
208 /** Shows/Hides item on given arena display list */
209 unsigned int sp_item_display_key_new(unsigned int numkeys);
210 NRArenaItem *sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
211 void sp_item_invoke_hide(SPItem *item, unsigned int key);
213 void sp_item_snappoints(SPItem const *item, SnapPointsIter p);
215 void sp_item_adjust_pattern(SPItem *item, /* NR::Matrix const &premul, */ NR::Matrix const &postmul, bool set = false);
216 void sp_item_adjust_gradient(SPItem *item, /* NR::Matrix const &premul, */ NR::Matrix const &postmul, bool set = false);
217 void sp_item_adjust_stroke(SPItem *item, gdouble ex);
218 void sp_item_adjust_stroke_width_recursive(SPItem *item, gdouble ex);
219 void sp_item_adjust_paint_recursive(SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern);
221 void sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv = NULL);
222 void sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv = NULL);
224 void sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform);
226 gint sp_item_event (SPItem *item, SPEvent *event);
228 /* Utility */
230 NRArenaItem *sp_item_get_arenaitem(SPItem *item, unsigned int key);
232 void sp_item_bbox_desktop(SPItem *item, NRRect *bbox) __attribute__ ((deprecated));
233 NR::Rect sp_item_bbox_desktop(SPItem *item);
235 NR::Matrix i2anc_affine(SPObject const *item, SPObject const *ancestor);
236 NR::Matrix i2i_affine(SPObject const *src, SPObject const *dest);
238 NR::Matrix sp_item_i2doc_affine(SPItem const *item);
239 NR::Matrix sp_item_i2root_affine(SPItem const *item);
241 NR::Matrix matrix_to_desktop (NR::Matrix m, SPItem const *item);
242 NR::Matrix matrix_from_desktop (NR::Matrix m, SPItem const *item);
244 /* fixme: - these are evil, but OK */
246 /* Fill *TRANSFORM with the item-to-desktop transform. See doc/coordinates.txt
247 * for a description of `Desktop coordinates'; though see also mental's comment
248 * at the top of that file.
249 *
250 * \return TRANSFORM.
251 */
252 NR::Matrix sp_item_i2d_affine(SPItem const *item);
253 NR::Matrix sp_item_i2r_affine(SPItem const *item);
254 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &transform);
255 NR::Matrix sp_item_dt2i_affine(SPItem const *item);
256 int sp_item_repr_compare_position(SPItem *first, SPItem *second);
257 SPItem *sp_item_first_item_child (SPObject *obj);
259 #endif
261 /*
262 Local Variables:
263 mode:c++
264 c-file-style:"stroustrup"
265 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
266 indent-tabs-mode:nil
267 fill-column:99
268 End:
269 */
270 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :