9944e86b4a99d76a77754acc257d34465e6fe2e7
1 #define __SP_SPIRAL_CONTEXT_C__
3 /*
4 * Spiral drawing context
5 *
6 * Authors:
7 * Mitsuru Oka
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 * bulia byak <buliabyak@users.sf.net>
10 *
11 * Copyright (C) 1999-2001 Lauris Kaplinski
12 * Copyright (C) 2001-2002 Mitsuru Oka
13 *
14 * Released under GNU GPL
15 */
17 #include "config.h"
19 #include <gdk/gdkkeysyms.h>
20 #include <cstring>
21 #include <string>
23 #include "macros.h"
24 #include "display/sp-canvas.h"
25 #include "sp-spiral.h"
26 #include "document.h"
27 #include "sp-namedview.h"
28 #include "selection.h"
29 #include "desktop-handles.h"
30 #include "desktop-affine.h"
31 #include "snap.h"
32 #include "desktop.h"
33 #include "desktop-style.h"
34 #include "message-context.h"
35 #include "pixmaps/cursor-spiral.xpm"
36 #include "spiral-context.h"
37 #include "sp-metrics.h"
38 #include <glibmm/i18n.h>
39 #include "object-edit.h"
40 #include "xml/repr.h"
41 #include "xml/node-event-vector.h"
42 #include "preferences.h"
43 #include "context-fns.h"
45 static void sp_spiral_context_class_init(SPSpiralContextClass * klass);
46 static void sp_spiral_context_init(SPSpiralContext *spiral_context);
47 static void sp_spiral_context_dispose(GObject *object);
48 static void sp_spiral_context_setup(SPEventContext *ec);
49 static void sp_spiral_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
51 static gint sp_spiral_context_root_handler(SPEventContext *event_context, GdkEvent *event);
53 static void sp_spiral_drag(SPSpiralContext *sc, Geom::Point p, guint state);
54 static void sp_spiral_finish(SPSpiralContext *sc);
56 static SPEventContextClass *parent_class;
58 GtkType
59 sp_spiral_context_get_type()
60 {
61 static GType type = 0;
62 if (!type) {
63 GTypeInfo info = {
64 sizeof(SPSpiralContextClass),
65 NULL, NULL,
66 (GClassInitFunc) sp_spiral_context_class_init,
67 NULL, NULL,
68 sizeof(SPSpiralContext),
69 4,
70 (GInstanceInitFunc) sp_spiral_context_init,
71 NULL, /* value_table */
72 };
73 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPSpiralContext", &info, (GTypeFlags)0);
74 }
75 return type;
76 }
78 static void
79 sp_spiral_context_class_init(SPSpiralContextClass *klass)
80 {
81 GObjectClass *object_class = (GObjectClass *) klass;
82 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
84 parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
86 object_class->dispose = sp_spiral_context_dispose;
88 event_context_class->setup = sp_spiral_context_setup;
89 event_context_class->set = sp_spiral_context_set;
90 event_context_class->root_handler = sp_spiral_context_root_handler;
91 }
93 static void
94 sp_spiral_context_init(SPSpiralContext *spiral_context)
95 {
96 SPEventContext *event_context = SP_EVENT_CONTEXT(spiral_context);
98 event_context->cursor_shape = cursor_spiral_xpm;
99 event_context->hot_x = 4;
100 event_context->hot_y = 4;
101 event_context->xp = 0;
102 event_context->yp = 0;
103 event_context->tolerance = 0;
104 event_context->within_tolerance = false;
105 event_context->item_to_select = NULL;
107 event_context->shape_repr = NULL;
108 event_context->shape_knot_holder = NULL;
110 spiral_context->item = NULL;
112 spiral_context->revo = 3.0;
113 spiral_context->exp = 1.0;
114 spiral_context->t0 = 0.0;
116 new (&spiral_context->sel_changed_connection) sigc::connection();
117 }
119 static void
120 sp_spiral_context_dispose(GObject *object)
121 {
122 SPSpiralContext *sc = SP_SPIRAL_CONTEXT(object);
123 SPEventContext *ec = SP_EVENT_CONTEXT(object);
125 ec->enableGrDrag(false);
127 sc->sel_changed_connection.disconnect();
128 sc->sel_changed_connection.~connection();
130 /* fixme: This is necessary because we do not grab */
131 if (sc->item) sp_spiral_finish(sc);
133 if (ec->shape_knot_holder) {
134 delete ec->shape_knot_holder;
135 ec->shape_knot_holder = NULL;
136 }
138 if (ec->shape_repr) { // remove old listener
139 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
140 Inkscape::GC::release(ec->shape_repr);
141 ec->shape_repr = 0;
142 }
144 if (sc->_message_context) {
145 delete sc->_message_context;
146 }
148 G_OBJECT_CLASS(parent_class)->dispose(object);
149 }
151 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
152 NULL, /* child_added */
153 NULL, /* child_removed */
154 ec_shape_event_attr_changed,
155 NULL, /* content_changed */
156 NULL /* order_changed */
157 };
159 /**
160 \brief Callback that processes the "changed" signal on the selection;
161 destroys old and creates new knotholder
162 */
163 void
164 sp_spiral_context_selection_changed(Inkscape::Selection *selection, gpointer data)
165 {
166 SPSpiralContext *sc = SP_SPIRAL_CONTEXT(data);
167 SPEventContext *ec = SP_EVENT_CONTEXT(sc);
169 if (ec->shape_knot_holder) { // desktroy knotholder
170 delete ec->shape_knot_holder;
171 ec->shape_knot_holder = NULL;
172 }
174 if (ec->shape_repr) { // remove old listener
175 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
176 Inkscape::GC::release(ec->shape_repr);
177 ec->shape_repr = 0;
178 }
180 SPItem *item = selection->singleItem();
181 if (item) {
182 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
183 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
184 if (shape_repr) {
185 ec->shape_repr = shape_repr;
186 Inkscape::GC::anchor(shape_repr);
187 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
188 }
189 }
190 }
192 static void
193 sp_spiral_context_setup(SPEventContext *ec)
194 {
195 SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec);
197 if (((SPEventContextClass *) parent_class)->setup)
198 ((SPEventContextClass *) parent_class)->setup(ec);
200 sp_event_context_read(ec, "expansion");
201 sp_event_context_read(ec, "revolution");
202 sp_event_context_read(ec, "t0");
204 Inkscape::Selection *selection = sp_desktop_selection(ec->desktop);
206 SPItem *item = selection->singleItem();
207 if (item) {
208 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
209 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
210 if (shape_repr) {
211 ec->shape_repr = shape_repr;
212 Inkscape::GC::anchor(shape_repr);
213 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
214 }
215 }
217 sc->sel_changed_connection.disconnect();
218 sc->sel_changed_connection = selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_spiral_context_selection_changed), (gpointer)sc));
220 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
221 if (prefs->getBool("/tools/shapes/selcue")) {
222 ec->enableSelectionCue();
223 }
224 if (prefs->getBool("/tools/shapes/gradientdrag")) {
225 ec->enableGrDrag();
226 }
228 sc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
229 }
231 static void
232 sp_spiral_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val)
233 {
234 SPSpiralContext *sc = SP_SPIRAL_CONTEXT(ec);
235 Glib::ustring name = val->getEntryName();
237 if (name == "expansion") {
238 sc->exp = CLAMP(val->getDouble(), 0.0, 1000.0);
239 } else if (name == "revolution") {
240 sc->revo = CLAMP(val->getDouble(3.0), 0.05, 40.0);
241 } else if (name == "t0") {
242 sc->t0 = CLAMP(val->getDouble(), 0.0, 0.999);
243 }
244 }
246 static gint
247 sp_spiral_context_root_handler(SPEventContext *event_context, GdkEvent *event)
248 {
249 static gboolean dragging;
251 SPDesktop *desktop = event_context->desktop;
252 Inkscape::Selection *selection = sp_desktop_selection (desktop);
253 SPSpiralContext *sc = SP_SPIRAL_CONTEXT(event_context);
255 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
256 event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
258 gint ret = FALSE;
260 switch (event->type) {
261 case GDK_BUTTON_PRESS:
262 if (event->button.button == 1 && !event_context->space_panning) {
264 dragging = TRUE;
265 sc->center = Inkscape::setup_for_drag_start(desktop, event_context, event);
267 SnapManager &m = desktop->namedview->snap_manager;
268 m.setup(desktop);
269 Geom::Point pt2g = to_2geom(sc->center);
270 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g);
271 sc->center = from_2geom(pt2g);
273 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
274 ( GDK_KEY_PRESS_MASK |
275 GDK_BUTTON_RELEASE_MASK |
276 GDK_POINTER_MOTION_MASK |
277 GDK_POINTER_MOTION_HINT_MASK |
278 GDK_BUTTON_PRESS_MASK ),
279 NULL, event->button.time);
280 ret = TRUE;
281 }
282 break;
283 case GDK_MOTION_NOTIFY:
284 if (dragging && (event->motion.state & GDK_BUTTON1_MASK) && !event_context->space_panning) {
286 if ( event_context->within_tolerance
287 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
288 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
289 break; // do not drag if we're within tolerance from origin
290 }
291 // Once the user has moved farther than tolerance from the original location
292 // (indicating they intend to draw, not click), then always process the
293 // motion notify coordinates as given (no snapping back to origin)
294 event_context->within_tolerance = false;
296 Geom::Point const motion_w(event->motion.x, event->motion.y);
297 Geom::Point motion_dt(event_context->desktop->w2d(motion_w));
299 SnapManager &m = desktop->namedview->snap_manager;
300 m.setup(desktop, true, sc->item);
301 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, motion_dt);
302 sp_spiral_drag(sc, from_2geom(motion_dt), event->motion.state);
304 gobble_motion_events(GDK_BUTTON1_MASK);
306 ret = TRUE;
307 }
308 break;
309 case GDK_BUTTON_RELEASE:
310 event_context->xp = event_context->yp = 0;
311 if (event->button.button == 1 && !event_context->space_panning) {
312 dragging = FALSE;
313 if (!event_context->within_tolerance) {
314 // we've been dragging, finish the spiral
315 sp_spiral_finish(sc);
316 } else if (event_context->item_to_select) {
317 // no dragging, select clicked item if any
318 if (event->button.state & GDK_SHIFT_MASK) {
319 selection->toggle(event_context->item_to_select);
320 } else {
321 selection->set(event_context->item_to_select);
322 }
323 } else {
324 // click in an empty space
325 selection->clear();
326 }
328 event_context->item_to_select = NULL;
329 ret = TRUE;
330 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);
331 }
332 break;
333 case GDK_KEY_PRESS:
334 switch (get_group0_keyval(&event->key)) {
335 case GDK_Alt_R:
336 case GDK_Control_L:
337 case GDK_Control_R:
338 case GDK_Shift_L:
339 case GDK_Shift_R:
340 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
341 case GDK_Meta_R:
342 sp_event_show_modifier_tip(event_context->defaultMessageContext(), event,
343 _("<b>Ctrl</b>: snap angle"),
344 NULL,
345 _("<b>Alt</b>: lock spiral radius"));
346 break;
347 case GDK_Up:
348 case GDK_Down:
349 case GDK_KP_Up:
350 case GDK_KP_Down:
351 // prevent the zoom field from activation
352 if (!MOD__CTRL_ONLY)
353 ret = TRUE;
354 break;
355 case GDK_x:
356 case GDK_X:
357 if (MOD__ALT_ONLY) {
358 desktop->setToolboxFocusTo ("altx-spiral");
359 ret = TRUE;
360 }
361 break;
362 case GDK_Escape:
363 sp_desktop_selection(desktop)->clear();
364 //TODO: make dragging escapable by Esc
365 break;
367 case GDK_space:
368 if (dragging) {
369 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
370 event->button.time);
371 dragging = false;
372 if (!event_context->within_tolerance) {
373 // we've been dragging, finish the rect
374 sp_spiral_finish(sc);
375 }
376 // do not return true, so that space would work switching to selector
377 }
378 break;
380 default:
381 break;
382 }
383 break;
384 case GDK_KEY_RELEASE:
385 switch (get_group0_keyval(&event->key)) {
386 case GDK_Alt_L:
387 case GDK_Alt_R:
388 case GDK_Control_L:
389 case GDK_Control_R:
390 case GDK_Shift_L:
391 case GDK_Shift_R:
392 case GDK_Meta_L: // Meta is when you press Shift+Alt
393 case GDK_Meta_R:
394 event_context->defaultMessageContext()->clear();
395 break;
396 default:
397 break;
398 }
399 break;
400 default:
401 break;
402 }
404 if (!ret) {
405 if (((SPEventContextClass *) parent_class)->root_handler)
406 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
407 }
409 return ret;
410 }
412 static void
413 sp_spiral_drag(SPSpiralContext *sc, Geom::Point p, guint state)
414 {
415 SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop;
417 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
418 int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
420 if (!sc->item) {
422 if (Inkscape::have_viable_layer(desktop, sc->_message_context) == false) {
423 return;
424 }
426 /* Create object */
427 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(sc));
428 Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
429 repr->setAttribute("sodipodi:type", "spiral");
431 /* Set style */
432 sp_desktop_apply_style_tool(desktop, repr, "/tools/shapes/spiral", false);
434 sc->item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
435 Inkscape::GC::release(repr);
436 sc->item->transform = sp_item_i2doc_affine(SP_ITEM(desktop->currentLayer())).inverse();
437 sc->item->updateRepr();
439 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
440 }
442 SnapManager &m = desktop->namedview->snap_manager;
443 m.setup(desktop, true, sc->item);
444 Geom::Point pt2g = to_2geom(p);
445 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g);
447 Geom::Point const p0 = to_2geom(sp_desktop_dt2doc_xy_point(desktop, sc->center));
448 Geom::Point const p1 = to_2geom(sp_desktop_dt2doc_xy_point(desktop, from_2geom(pt2g)));
450 SPSpiral *spiral = SP_SPIRAL(sc->item);
452 Geom::Point const delta = p1 - p0;
453 gdouble const rad = Geom::L2(delta);
455 gdouble arg = Geom::atan2(delta) - 2.0*M_PI*spiral->revo;
457 if (state & GDK_CONTROL_MASK) {
458 arg = sp_round(arg, M_PI/snaps);
459 }
461 /* Fixme: these parameters should be got from dialog box */
462 sp_spiral_position_set(spiral, p0[Geom::X], p0[Geom::Y],
463 /*expansion*/ sc->exp,
464 /*revolution*/ sc->revo,
465 rad, arg,
466 /*t0*/ sc->t0);
468 /* status text */
469 GString *rads = SP_PX_TO_METRIC_STRING(rad, desktop->namedview->getDefaultMetric());
470 sc->_message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
471 _("<b>Spiral</b>: radius %s, angle %5g°; with <b>Ctrl</b> to snap angle"),
472 rads->str, sp_round((arg + 2.0*M_PI*spiral->revo)*180/M_PI, 0.0001));
473 g_string_free(rads, FALSE);
474 }
476 static void
477 sp_spiral_finish(SPSpiralContext *sc)
478 {
479 sc->_message_context->clear();
481 if (sc->item != NULL) {
482 SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop;
483 SPSpiral *spiral = SP_SPIRAL(sc->item);
485 sp_shape_set_shape(SP_SHAPE(spiral));
486 SP_OBJECT(spiral)->updateRepr(SP_OBJECT_WRITE_EXT);
488 sp_canvas_end_forced_full_redraws(desktop->canvas);
490 sp_desktop_selection(desktop)->set(sc->item);
491 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_SPIRAL,
492 _("Create spiral"));
494 sc->item = NULL;
495 }
496 }
499 /*
500 Local Variables:
501 mode:c++
502 c-file-style:"stroustrup"
503 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
504 indent-tabs-mode:nil
505 fill-column:99
506 End:
507 */
508 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :