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"
28 int KnotHolderEntity::counter = 0;
30 void
31 KnotHolderEntity::create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip,
32 SPKnotShapeType shape, SPKnotModeType mode, guint32 color)
33 {
34 knot = sp_knot_new(desktop, tip);
36 this->parent_holder = parent;
37 this->item = item; // TODO: remove the item either from here or from knotholder.cpp
39 my_counter = KnotHolderEntity::counter++;
41 g_object_set(G_OBJECT (knot->item), "shape", shape, NULL);
42 g_object_set(G_OBJECT (knot->item), "mode", mode, NULL);
44 knot->fill [SP_KNOT_STATE_NORMAL] = color;
45 g_object_set (G_OBJECT (knot->item), "fill_color", color, NULL);
47 update_knot();
48 sp_knot_show(knot);
50 _moved_connection = knot->_moved_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_moved_handler));
51 _click_connection = knot->_click_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_clicked_handler));
52 _ungrabbed_connection = knot->_ungrabbed_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_ungrabbed_handler));
53 }
56 KnotHolderEntity::~KnotHolderEntity()
57 {
58 _moved_connection.disconnect();
59 _click_connection.disconnect();
60 _ungrabbed_connection.disconnect();
62 /* unref should call destroy */
63 if (knot) {
64 g_object_unref(knot);
65 } else {
66 // FIXME: This shouldn't occur. Perhaps it is caused by LPE PointParams being knotholder entities, too
67 // If so, it will likely be fixed with upcoming refactoring efforts.
68 g_return_if_fail(knot);
69 }
70 }
72 void
73 KnotHolderEntity::update_knot()
74 {
75 NR::Matrix const i2d(from_2geom(sp_item_i2d_affine(item)));
77 NR::Point dp(knot_get() * i2d);
79 _moved_connection.block();
80 sp_knot_set_position(knot, &dp, SP_KNOT_STATE_NORMAL);
81 _moved_connection.unblock();
82 }
84 /* Pattern manipulation */
86 static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale)
87 {
88 gdouble theta = asin(pat->patternTransform[1] / scale);
89 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
90 return theta;
91 }
93 static gdouble sp_pattern_extract_scale(SPPattern *pat)
94 {
95 gdouble s = pat->patternTransform[1];
96 gdouble c = pat->patternTransform[0];
97 gdouble xscale = sqrt(c * c + s * s);
98 return xscale;
99 }
101 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
102 {
103 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
104 }
106 void
107 PatternKnotHolderEntityXY::knot_set(NR::Point const &p, NR::Point const &origin, guint state)
108 {
109 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
111 NR::Point p_snapped = p;
113 if ( state & GDK_CONTROL_MASK ) {
114 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
115 p_snapped[NR::Y] = origin[NR::Y];
116 } else {
117 p_snapped[NR::X] = origin[NR::X];
118 }
119 }
121 if (state) {
122 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
123 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
124 }
126 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
127 }
129 NR::Point
130 PatternKnotHolderEntityXY::knot_get()
131 {
132 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
133 return sp_pattern_extract_trans(pat);
134 }
136 NR::Point
137 PatternKnotHolderEntityAngle::knot_get()
138 {
139 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
141 gdouble x = (pattern_width(pat)*0.5);
142 gdouble y = 0;
143 NR::Point delta = NR::Point(x,y);
144 gdouble scale = sp_pattern_extract_scale(pat);
145 gdouble theta = sp_pattern_extract_theta(pat, scale);
146 delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale));
147 delta = delta + sp_pattern_extract_trans(pat);
148 return delta;
149 }
151 void
152 PatternKnotHolderEntityAngle::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint state)
153 {
154 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
156 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
158 // get the angle from pattern 0,0 to the cursor pos
159 NR::Point delta = p - sp_pattern_extract_trans(pat);
160 gdouble theta = atan2(delta);
162 if ( state & GDK_CONTROL_MASK ) {
163 theta = sp_round(theta, M_PI/snaps);
164 }
166 // get the scale from the current transform so we can keep it.
167 gdouble scl = sp_pattern_extract_scale(pat);
168 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
169 NR::Point const t = sp_pattern_extract_trans(pat);
170 rot[4] = t[NR::X];
171 rot[5] = t[NR::Y];
172 sp_item_adjust_pattern(item, rot, true);
173 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
174 }
176 void
177 PatternKnotHolderEntityScale::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint /*state*/)
178 {
179 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
181 // Get the scale from the position of the knotholder,
182 NR::Point d = p - sp_pattern_extract_trans(pat);
183 gdouble s = NR::L2(d);
184 gdouble pat_x = pattern_width(pat) * 0.5;
185 gdouble pat_y = pattern_height(pat) * 0.5;
186 gdouble pat_h = hypot(pat_x, pat_y);
187 gdouble scl = s / pat_h;
189 // get angle from current transform, (need get current scale first to calculate angle)
190 gdouble oldscale = sp_pattern_extract_scale(pat);
191 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
193 NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl));
194 NR::Point const t = sp_pattern_extract_trans(pat);
195 rot[4] = t[NR::X];
196 rot[5] = t[NR::Y];
197 sp_item_adjust_pattern(item, rot, true);
198 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
199 }
202 NR::Point
203 PatternKnotHolderEntityScale::knot_get()
204 {
205 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
207 gdouble x = pattern_width(pat)*0.5;
208 gdouble y = pattern_height(pat)*0.5;
209 NR::Point delta = NR::Point(x,y);
210 NR::Matrix a = pat->patternTransform;
211 a[4] = 0;
212 a[5] = 0;
213 delta = delta * a;
214 delta = delta + sp_pattern_extract_trans(pat);
215 return delta;
216 }
218 /*
219 Local Variables:
220 mode:c++
221 c-file-style:"stroustrup"
222 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
223 indent-tabs-mode:nil
224 fill-column:99
225 End:
226 */
227 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :