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 "preferences.h"
23 #include "macros.h"
24 #include <libnr/nr-matrix-ops.h>
25 #include "sp-pattern.h"
26 #include "snap.h"
27 #include "desktop.h"
28 #include "sp-namedview.h"
29 #include <2geom/matrix.h>
30 #include <2geom/transforms.h>
32 int KnotHolderEntity::counter = 0;
34 void
35 KnotHolderEntity::create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip,
36 SPKnotShapeType shape, SPKnotModeType mode, guint32 color)
37 {
38 knot = sp_knot_new(desktop, tip);
40 this->parent_holder = parent;
41 this->item = item; // TODO: remove the item either from here or from knotholder.cpp
42 this->desktop = desktop;
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 Geom::Matrix const i2d(sp_item_i2d_affine(item));
82 Geom::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 Geom::Point
90 KnotHolderEntity::snap_knot_position(Geom::Point const &p)
91 {
92 Geom::Matrix const i2d (sp_item_i2d_affine(item));
93 Geom::Point s = p * i2d;
94 SnapManager &m = desktop->namedview->snap_manager;
95 m.setup(desktop, true, item);
96 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, s);
97 return s * i2d.inverse();
98 }
101 /* Pattern manipulation */
103 /* TODO: this pattern manipulation is not able to handle general transformation matrices. Only matrices that are the result of a pure scale times a pure rotation. */
105 static gdouble sp_pattern_extract_theta(SPPattern *pat)
106 {
107 Geom::Matrix transf = pat->patternTransform;
108 return Geom::atan2(transf.xAxis());
109 }
111 static Geom::Point sp_pattern_extract_scale(SPPattern *pat)
112 {
113 Geom::Matrix transf = pat->patternTransform;
114 return Geom::Point( transf.expansionX(), transf.expansionY() );
115 }
117 static Geom::Point sp_pattern_extract_trans(SPPattern const *pat)
118 {
119 return Geom::Point(pat->patternTransform[4], pat->patternTransform[5]);
120 }
122 void
123 PatternKnotHolderEntityXY::knot_set(Geom::Point const &p, Geom::Point const &origin, guint state)
124 {
125 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
127 // FIXME: this snapping should be done together with knowing whether control was pressed. If GDK_CONTROL_MASK, then constrained snapping should be used.
128 Geom::Point p_snapped = snap_knot_position(p);
130 if ( state & GDK_CONTROL_MASK ) {
131 if (fabs((p - origin)[Geom::X]) > fabs((p - origin)[Geom::Y])) {
132 p_snapped[Geom::Y] = origin[Geom::Y];
133 } else {
134 p_snapped[Geom::X] = origin[Geom::X];
135 }
136 }
138 if (state) {
139 Geom::Point const q = p_snapped - sp_pattern_extract_trans(pat);
140 sp_item_adjust_pattern(item, Geom::Matrix(Geom::Translate(q)));
141 }
143 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
144 }
146 Geom::Point
147 PatternKnotHolderEntityXY::knot_get()
148 {
149 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
150 return sp_pattern_extract_trans(pat);
151 }
153 Geom::Point
154 PatternKnotHolderEntityAngle::knot_get()
155 {
156 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
158 gdouble x = (pattern_width(pat));
159 gdouble y = 0;
160 Geom::Point delta = Geom::Point(x,y);
161 Geom::Point scale = sp_pattern_extract_scale(pat);
162 gdouble theta = sp_pattern_extract_theta(pat);
163 delta = delta * Geom::Matrix(Geom::Scale(scale))*Geom::Matrix(Geom::Rotate(theta));
164 delta = delta + sp_pattern_extract_trans(pat);
165 return delta;
166 }
168 void
169 PatternKnotHolderEntityAngle::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
170 {
171 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
172 int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
174 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
176 // get the angle from pattern 0,0 to the cursor pos
177 Geom::Point delta = p - sp_pattern_extract_trans(pat);
178 gdouble theta = atan2(delta);
180 if ( state & GDK_CONTROL_MASK ) {
181 theta = sp_round(theta, M_PI/snaps);
182 }
184 // get the scale from the current transform so we can keep it.
185 Geom::Point scl = sp_pattern_extract_scale(pat);
186 Geom::Matrix rot = Geom::Matrix(Geom::Scale(scl)) * Geom::Matrix(Geom::Rotate(theta));
187 Geom::Point const t = sp_pattern_extract_trans(pat);
188 rot[4] = t[Geom::X];
189 rot[5] = t[Geom::Y];
190 sp_item_adjust_pattern(item, rot, true);
191 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
192 }
194 void
195 PatternKnotHolderEntityScale::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
196 {
197 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
199 // FIXME: this snapping should be done together with knowing whether control was pressed. If GDK_CONTROL_MASK, then constrained snapping should be used.
200 Geom::Point p_snapped = snap_knot_position(p);
202 // get angle from current transform
203 gdouble theta = sp_pattern_extract_theta(pat);
205 // Get the new scale from the position of the knotholder
206 Geom::Point d = p_snapped - sp_pattern_extract_trans(pat);
207 gdouble pat_x = pattern_width(pat);
208 gdouble pat_y = pattern_height(pat);
209 Geom::Scale scl(1);
210 if ( state & GDK_CONTROL_MASK ) {
211 // if ctrl is pressed: use 1:1 scaling
212 gdouble pat_h = hypot(pat_x, pat_y);
213 scl = Geom::Scale(d.length() / pat_h);
214 } else {
215 d *= Geom::Rotate(-theta);
216 scl = Geom::Scale(d[Geom::X] / pat_x, d[Geom::Y] / pat_y);
217 }
219 Geom::Matrix rot = (Geom::Matrix)scl * Geom::Rotate(theta);
221 Geom::Point const t = sp_pattern_extract_trans(pat);
222 rot[4] = t[Geom::X];
223 rot[5] = t[Geom::Y];
224 sp_item_adjust_pattern(item, rot, true);
225 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
226 }
229 Geom::Point
230 PatternKnotHolderEntityScale::knot_get()
231 {
232 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
234 gdouble x = pattern_width(pat);
235 gdouble y = pattern_height(pat);
236 Geom::Point delta = Geom::Point(x,y);
237 Geom::Matrix a = pat->patternTransform;
238 a[4] = 0;
239 a[5] = 0;
240 delta = delta * a;
241 delta = delta + sp_pattern_extract_trans(pat);
242 return delta;
243 }
245 /*
246 Local Variables:
247 mode:c++
248 c-file-style:"stroustrup"
249 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
250 indent-tabs-mode:nil
251 fill-column:99
252 End:
253 */
254 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :