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"
32 #include <2geom/matrix.h>
34 int KnotHolderEntity::counter = 0;
36 void
37 KnotHolderEntity::create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip,
38 SPKnotShapeType shape, SPKnotModeType mode, guint32 color)
39 {
40 knot = sp_knot_new(desktop, tip);
42 this->parent_holder = parent;
43 this->item = item; // TODO: remove the item either from here or from knotholder.cpp
45 my_counter = KnotHolderEntity::counter++;
47 g_object_set(G_OBJECT (knot->item), "shape", shape, NULL);
48 g_object_set(G_OBJECT (knot->item), "mode", mode, NULL);
50 knot->fill [SP_KNOT_STATE_NORMAL] = color;
51 g_object_set (G_OBJECT (knot->item), "fill_color", color, NULL);
53 update_knot();
54 sp_knot_show(knot);
56 _moved_connection = knot->_moved_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_moved_handler));
57 _click_connection = knot->_click_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_clicked_handler));
58 _ungrabbed_connection = knot->_ungrabbed_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_ungrabbed_handler));
59 }
62 KnotHolderEntity::~KnotHolderEntity()
63 {
64 _moved_connection.disconnect();
65 _click_connection.disconnect();
66 _ungrabbed_connection.disconnect();
68 /* unref should call destroy */
69 if (knot) {
70 g_object_unref(knot);
71 } else {
72 // FIXME: This shouldn't occur. Perhaps it is caused by LPE PointParams being knotholder entities, too
73 // If so, it will likely be fixed with upcoming refactoring efforts.
74 g_return_if_fail(knot);
75 }
76 }
78 void
79 KnotHolderEntity::update_knot()
80 {
81 NR::Matrix const i2d(from_2geom(sp_item_i2d_affine(item)));
83 NR::Point dp(knot_get() * i2d);
85 _moved_connection.block();
86 sp_knot_set_position(knot, &dp, SP_KNOT_STATE_NORMAL);
87 _moved_connection.unblock();
88 }
90 /* Pattern manipulation */
92 static gdouble sp_pattern_extract_theta(SPPattern *pat, NR::Point scale)
93 {
94 gdouble theta = asin(pat->patternTransform[1] / scale[NR::X]);
95 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
96 return theta;
97 }
99 static NR::Point sp_pattern_extract_scale(SPPattern *pat)
100 {
101 Geom::Matrix transf = to_2geom(pat->patternTransform);
102 return NR::Point( transf.expansionX(), transf.expansionY() );
103 }
105 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
106 {
107 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
108 }
110 static NR::Point snap_knot_position(SPItem *item, NR::Point const &p)
111 {
112 SPDesktop const *desktop = inkscape_active_desktop();
113 NR::Matrix const i2d (from_2geom(sp_item_i2d_affine (item)));
114 NR::Point s = p * i2d;
115 SnapManager &m = desktop->namedview->snap_manager;
116 m.setup(desktop, item);
117 m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, s);
118 return s * i2d.inverse();
119 }
121 void
122 PatternKnotHolderEntityXY::knot_set(NR::Point const &p, NR::Point const &origin, guint state)
123 {
124 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
126 NR::Point p_snapped = snap_knot_position(item, p);
128 if ( state & GDK_CONTROL_MASK ) {
129 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
130 p_snapped[NR::Y] = origin[NR::Y];
131 } else {
132 p_snapped[NR::X] = origin[NR::X];
133 }
134 }
136 if (state) {
137 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
138 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
139 }
141 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
142 }
144 NR::Point
145 PatternKnotHolderEntityXY::knot_get()
146 {
147 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
148 return sp_pattern_extract_trans(pat);
149 }
151 NR::Point
152 PatternKnotHolderEntityAngle::knot_get()
153 {
154 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
156 gdouble x = (pattern_width(pat)*0.5);
157 gdouble y = 0;
158 NR::Point delta = NR::Point(x,y);
159 NR::Point scale = sp_pattern_extract_scale(pat);
160 gdouble theta = sp_pattern_extract_theta(pat, scale);
161 delta = delta * NR::Matrix(NR::scale(scale))*NR::Matrix(NR::rotate(theta));
162 delta = delta + sp_pattern_extract_trans(pat);
163 return delta;
164 }
166 void
167 PatternKnotHolderEntityAngle::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint state)
168 {
169 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
171 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
173 // get the angle from pattern 0,0 to the cursor pos
174 NR::Point delta = p - sp_pattern_extract_trans(pat);
175 gdouble theta = atan2(delta);
177 if ( state & GDK_CONTROL_MASK ) {
178 theta = sp_round(theta, M_PI/snaps);
179 }
181 // get the scale from the current transform so we can keep it.
182 NR::Point scl = sp_pattern_extract_scale(pat);
183 NR::Matrix rot = NR::Matrix(NR::scale(scl)) * NR::Matrix(NR::rotate(theta));
184 NR::Point const t = sp_pattern_extract_trans(pat);
185 rot[4] = t[NR::X];
186 rot[5] = t[NR::Y];
187 sp_item_adjust_pattern(item, rot, true);
188 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
189 }
191 void
192 PatternKnotHolderEntityScale::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint /*state*/)
193 {
194 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
196 NR::Point p_snapped = snap_knot_position(item, p);
198 // get angle from current transform, (need get current scale first to calculate angle)
199 NR::Point oldscale = sp_pattern_extract_scale(pat);
200 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
202 // Get the new scale from the position of the knotholder
203 NR::Point d = p_snapped - sp_pattern_extract_trans(pat);
204 d *= NR::Matrix(NR::rotate(-theta));
205 gdouble pat_x = pattern_width(pat) * 0.5;
206 gdouble pat_y = pattern_height(pat) * 0.5;
207 NR::Point scl (d[NR::X] / pat_x, d[NR::Y] / pat_y);
209 NR::Matrix rot = NR::Matrix(NR::scale(scl)) * NR::Matrix(NR::rotate(theta));
211 NR::Point const t = sp_pattern_extract_trans(pat);
212 rot[4] = t[NR::X];
213 rot[5] = t[NR::Y];
214 sp_item_adjust_pattern(item, rot, true);
215 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
216 }
219 NR::Point
220 PatternKnotHolderEntityScale::knot_get()
221 {
222 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
224 gdouble x = pattern_width(pat)*0.5;
225 gdouble y = pattern_height(pat)*0.5;
226 NR::Point delta = NR::Point(x,y);
227 NR::Matrix a = pat->patternTransform;
228 a[4] = 0;
229 a[5] = 0;
230 delta = delta * a;
231 delta = delta + sp_pattern_extract_trans(pat);
232 return delta;
233 }
235 /*
236 Local Variables:
237 mode:c++
238 c-file-style:"stroustrup"
239 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
240 indent-tabs-mode:nil
241 fill-column:99
242 End:
243 */
244 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :