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 "snap.h"
27 #include "desktop.h"
28 #include "sp-namedview.h"
29 #include <2geom/matrix.h>
31 int KnotHolderEntity::counter = 0;
33 void
34 KnotHolderEntity::create(SPDesktop *desktop, SPItem *item, KnotHolder *parent, const gchar *tip,
35 SPKnotShapeType shape, SPKnotModeType mode, guint32 color)
36 {
37 knot = sp_knot_new(desktop, tip);
39 this->parent_holder = parent;
40 this->item = item; // TODO: remove the item either from here or from knotholder.cpp
41 this->desktop = desktop;
43 my_counter = KnotHolderEntity::counter++;
45 g_object_set(G_OBJECT (knot->item), "shape", shape, NULL);
46 g_object_set(G_OBJECT (knot->item), "mode", mode, NULL);
48 knot->fill [SP_KNOT_STATE_NORMAL] = color;
49 g_object_set (G_OBJECT (knot->item), "fill_color", color, NULL);
51 update_knot();
52 sp_knot_show(knot);
54 _moved_connection = knot->_moved_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_moved_handler));
55 _click_connection = knot->_click_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_clicked_handler));
56 _ungrabbed_connection = knot->_ungrabbed_signal.connect(sigc::mem_fun(*parent_holder, &KnotHolder::knot_ungrabbed_handler));
57 }
60 KnotHolderEntity::~KnotHolderEntity()
61 {
62 _moved_connection.disconnect();
63 _click_connection.disconnect();
64 _ungrabbed_connection.disconnect();
66 /* unref should call destroy */
67 if (knot) {
68 g_object_unref(knot);
69 } else {
70 // FIXME: This shouldn't occur. Perhaps it is caused by LPE PointParams being knotholder entities, too
71 // If so, it will likely be fixed with upcoming refactoring efforts.
72 g_return_if_fail(knot);
73 }
74 }
76 void
77 KnotHolderEntity::update_knot()
78 {
79 NR::Matrix const i2d(from_2geom(sp_item_i2d_affine(item)));
81 NR::Point dp(knot_get() * i2d);
83 _moved_connection.block();
84 sp_knot_set_position(knot, &dp, SP_KNOT_STATE_NORMAL);
85 _moved_connection.unblock();
86 }
88 NR::Point
89 KnotHolderEntity::snap_knot_position(NR::Point const &p)
90 {
91 NR::Matrix const i2d (from_2geom(sp_item_i2d_affine(item)));
92 NR::Point s = p * i2d;
93 SnapManager &m = desktop->namedview->snap_manager;
94 m.setup(desktop, item);
95 m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, s);
96 return s * i2d.inverse();
97 }
100 /* Pattern manipulation */
102 static gdouble sp_pattern_extract_theta(SPPattern *pat, NR::Point scale)
103 {
104 gdouble theta = asin(pat->patternTransform[1] / scale[NR::X]);
105 if (pat->patternTransform[0] < 0) theta = M_PI - theta ;
106 return theta;
107 }
109 static NR::Point sp_pattern_extract_scale(SPPattern *pat)
110 {
111 Geom::Matrix transf = to_2geom(pat->patternTransform);
112 return NR::Point( transf.expansionX(), transf.expansionY() );
113 }
115 static NR::Point sp_pattern_extract_trans(SPPattern const *pat)
116 {
117 return NR::Point(pat->patternTransform[4], pat->patternTransform[5]);
118 }
120 void
121 PatternKnotHolderEntityXY::knot_set(NR::Point const &p, NR::Point const &origin, guint state)
122 {
123 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
125 NR::Point p_snapped = snap_knot_position(p);
127 if ( state & GDK_CONTROL_MASK ) {
128 if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) {
129 p_snapped[NR::Y] = origin[NR::Y];
130 } else {
131 p_snapped[NR::X] = origin[NR::X];
132 }
133 }
135 if (state) {
136 NR::Point const q = p_snapped - sp_pattern_extract_trans(pat);
137 sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q)));
138 }
140 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
141 }
143 NR::Point
144 PatternKnotHolderEntityXY::knot_get()
145 {
146 SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
147 return sp_pattern_extract_trans(pat);
148 }
150 NR::Point
151 PatternKnotHolderEntityAngle::knot_get()
152 {
153 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
155 gdouble x = (pattern_width(pat));
156 gdouble y = 0;
157 NR::Point delta = NR::Point(x,y);
158 NR::Point scale = sp_pattern_extract_scale(pat);
159 gdouble theta = sp_pattern_extract_theta(pat, scale);
160 delta = delta * NR::Matrix(NR::scale(scale))*NR::Matrix(NR::rotate(theta));
161 delta = delta + sp_pattern_extract_trans(pat);
162 return delta;
163 }
165 void
166 PatternKnotHolderEntityAngle::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint state)
167 {
168 int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
170 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
172 // get the angle from pattern 0,0 to the cursor pos
173 NR::Point delta = p - sp_pattern_extract_trans(pat);
174 gdouble theta = atan2(delta);
176 if ( state & GDK_CONTROL_MASK ) {
177 theta = sp_round(theta, M_PI/snaps);
178 }
180 // get the scale from the current transform so we can keep it.
181 NR::Point scl = sp_pattern_extract_scale(pat);
182 NR::Matrix rot = NR::Matrix(NR::scale(scl)) * NR::Matrix(NR::rotate(theta));
183 NR::Point const t = sp_pattern_extract_trans(pat);
184 rot[4] = t[NR::X];
185 rot[5] = t[NR::Y];
186 sp_item_adjust_pattern(item, rot, true);
187 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
188 }
190 void
191 PatternKnotHolderEntityScale::knot_set(NR::Point const &p, NR::Point const &/*origin*/, guint /*state*/)
192 {
193 SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
195 NR::Point p_snapped = snap_knot_position(p);
197 // get angle from current transform, (need get current scale first to calculate angle)
198 NR::Point oldscale = sp_pattern_extract_scale(pat);
199 gdouble theta = sp_pattern_extract_theta(pat,oldscale);
201 // Get the new scale from the position of the knotholder
202 NR::Point d = p_snapped - sp_pattern_extract_trans(pat);
203 d *= NR::Matrix(NR::rotate(-theta));
204 gdouble pat_x = pattern_width(pat);
205 gdouble pat_y = pattern_height(pat);
206 NR::Point scl (d[NR::X] / pat_x, d[NR::Y] / pat_y);
208 NR::Matrix rot = NR::Matrix(NR::scale(scl)) * NR::Matrix(NR::rotate(theta));
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);
224 gdouble y = pattern_height(pat);
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 :