1 #define __KNOT_HOLDER_ENTITY_C__
3 /** \file
4 * KnotHolderEntity definition.
5 *
6 * Authors:
7 * Mitsuru Oka <oka326@parkcity.ne.jp>
8 * Maximilian Albert <maximilian.albert@gmail.com>
9 *
10 * Copyright (C) 1999-2001 Lauris Kaplinski
11 * Copyright (C) 2000-2001 Ximian, Inc.
12 * Copyright (C) 2001 Mitsuru Oka
13 * Copyright (C) 2004 Monash University
14 * Copyright (C) 2008 Maximilian Albert
15 *
16 * Released under GNU GPL
17 */
19 #include "knotholder.h"
20 #include "sp-item.h"
21 #include "style.h"
22 #include "prefs-utils.h"
23 #include "macros.h"
24 #include <libnr/nr-matrix-ops.h>
25 #include "sp-pattern.h"
26 #include "inkscape.h"
27 #include "snap.h"
28 #include "desktop-affine.h"
29 #include "desktop.h"
30 #include "desktop-handles.h"
31 #include "sp-namedview.h"
33 int KnotHolderEntity::counter = 0;
35 void
36 KnotHolderEntity::create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip,
37 SPKnotShapeType shape, SPKnotModeType mode, guint32 color)
38 {
39 knot = sp_knot_new(desktop, tip);
41 this->parent_holder = parent;
42 this->item = item; // TODO: remove the item either from here or from knotholder.cpp
44 my_counter = KnotHolderEntity::counter++;
46 g_object_set(G_OBJECT (knot->item), "shape", shape, NULL);
47 g_object_set(G_OBJECT (knot->item), "mode", mode, NULL);
49 knot->fill [SP_KNOT_STATE_NORMAL] = color;
50 g_object_set (G_OBJECT (knot->item), "fill_color", color, NULL);
52 update_knot();
53 sp_knot_show(knot);
55 _moved_connection = knot->_moved_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_moved_handler));
56 _click_connection = knot->_click_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_clicked_handler));
57 _ungrabbed_connection = knot->_ungrabbed_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_ungrabbed_handler));
58 }
61 KnotHolderEntity::~KnotHolderEntity()
62 {
63 _moved_connection.disconnect();
64 _click_connection.disconnect();
65 _ungrabbed_connection.disconnect();
67 /* unref should call destroy */
68 if (knot) {
69 g_object_unref(knot);
70 } else {
71 // FIXME: This shouldn't occur. Perhaps it is caused by LPE PointParams being knotholder entities, too
72 // If so, it will likely be fixed with upcoming refactoring efforts.
73 g_return_if_fail(knot);
74 }
75 }
77 void
78 KnotHolderEntity::update_knot()
79 {
80 NR::Matrix const i2d(from_2geom(sp_item_i2d_affine(item)));
82 NR::Point dp(knot_get() * i2d);
84 _moved_connection.block();
85 sp_knot_set_position(knot, &dp, SP_KNOT_STATE_NORMAL);
86 _moved_connection.unblock();
87 }
89 /* Pattern manipulation */
91 static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale)
92 {
93 gdouble theta = asin(pat->patternTransform[1] / scale);
94 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
95 return theta;
96 }
98 static gdouble sp_pattern_extract_scale(SPPattern *pat)
99 {
100 gdouble s = pat->patternTransform[1];
101 gdouble c = pat->patternTransform[0];
102 gdouble xscale = sqrt(c * c + s * s);
103 return xscale;
104 }
106 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
107 {
108 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
109 }
111 static NR::Point snap_knot_position(SPItem *item, NR::Point const &p)
112 {
113 SPDesktop const *desktop = inkscape_active_desktop();
114 NR::Matrix const i2d (from_2geom(sp_item_i2d_affine (item)));
115 NR::Point s = p * i2d;
116 SnapManager &m = desktop->namedview->snap_manager;
117 m.setup(desktop, item);
118 m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, s);
119 return s * i2d.inverse();
120 }
122 void
123 PatternKnotHolderEntityXY::knot_set(NR::Point const &p, NR::Point const &origin, guint state)
124 {
125 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
127 NR::Point p_snapped = snap_knot_position(item, p); //p;
129 if ( state & GDK_CONTROL_MASK ) {
130 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
131 p_snapped[NR::Y] = origin[NR::Y];
132 } else {
133 p_snapped[NR::X] = origin[NR::X];
134 }
135 }
137 if (state) {
138 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
139 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
140 }
142 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
143 }
145 NR::Point
146 PatternKnotHolderEntityXY::knot_get()
147 {
148 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
149 return sp_pattern_extract_trans(pat);
150 }
152 NR::Point
153 PatternKnotHolderEntityAngle::knot_get()
154 {
155 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
157 gdouble x = (pattern_width(pat)*0.5);
158 gdouble y = 0;
159 NR::Point delta = NR::Point(x,y);
160 gdouble scale = sp_pattern_extract_scale(pat);
161 gdouble theta = sp_pattern_extract_theta(pat, scale);
162 delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale));
163 delta = delta + sp_pattern_extract_trans(pat);
164 return delta;
165 }
167 void
168 PatternKnotHolderEntityAngle::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint state)
169 {
170 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
172 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
174 // get the angle from pattern 0,0 to the cursor pos
175 NR::Point delta = p - sp_pattern_extract_trans(pat);
176 gdouble theta = atan2(delta);
178 if ( state & GDK_CONTROL_MASK ) {
179 theta = sp_round(theta, M_PI/snaps);
180 }
182 // get the scale from the current transform so we can keep it.
183 gdouble scl = sp_pattern_extract_scale(pat);
184 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
185 NR::Point const t = sp_pattern_extract_trans(pat);
186 rot[4] = t[NR::X];
187 rot[5] = t[NR::Y];
188 sp_item_adjust_pattern(item, rot, true);
189 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
190 }
192 void
193 PatternKnotHolderEntityScale::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint /*state*/)
194 {
195 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
197 // Get the scale from the position of the knotholder,
198 NR::Point d = p - sp_pattern_extract_trans(pat);
199 gdouble s = NR::L2(d);
200 gdouble pat_x = pattern_width(pat) * 0.5;
201 gdouble pat_y = pattern_height(pat) * 0.5;
202 gdouble pat_h = hypot(pat_x, pat_y);
203 gdouble scl = s / pat_h;
205 // get angle from current transform, (need get current scale first to calculate angle)
206 gdouble oldscale = sp_pattern_extract_scale(pat);
207 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
209 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
210 NR::Point const t = sp_pattern_extract_trans(pat);
211 rot[4] = t[NR::X];
212 rot[5] = t[NR::Y];
213 sp_item_adjust_pattern(item, rot, true);
214 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
215 }
218 NR::Point
219 PatternKnotHolderEntityScale::knot_get()
220 {
221 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
223 gdouble x = pattern_width(pat)*0.5;
224 gdouble y = pattern_height(pat)*0.5;
225 NR::Point delta = NR::Point(x,y);
226 NR::Matrix a = pat->patternTransform;
227 a[4] = 0;
228 a[5] = 0;
229 delta = delta * a;
230 delta = delta + sp_pattern_extract_trans(pat);
231 return delta;
232 }
234 /*
235 Local Variables:
236 mode:c++
237 c-file-style:"stroustrup"
238 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
239 indent-tabs-mode:nil
240 fill-column:99
241 End:
242 */
243 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :