1 #define __SP_3DBOX_CONTEXT_C__
3 /*
4 * 3D box drawing context
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2007 Maximilian Albert <Anhalter42@gmx.de>
11 * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
12 * Copyright (C) 2000-2005 authors
13 * Copyright (C) 2000-2001 Ximian, Inc.
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include "config.h"
20 #include <gdk/gdkkeysyms.h>
22 #include "macros.h"
23 #include "display/sp-canvas.h"
24 #include "document.h"
25 #include "sp-namedview.h"
26 #include "selection.h"
27 #include "desktop-handles.h"
28 #include "snap.h"
29 #include "display/curve.h"
30 #include "desktop.h"
31 #include "message-context.h"
32 #include "pixmaps/cursor-rect.xpm"
33 #include "box3d.h"
34 #include "box3d-context.h"
35 #include "sp-metrics.h"
36 #include <glibmm/i18n.h>
37 #include "object-edit.h"
38 #include "xml/repr.h"
39 #include "xml/node-event-vector.h"
40 #include "prefs-utils.h"
41 #include "context-fns.h"
43 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass);
44 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context);
45 static void sp_3dbox_context_dispose(GObject *object);
47 static void sp_3dbox_context_setup(SPEventContext *ec);
48 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
50 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event);
51 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
53 static void sp_3dbox_drag(SP3DBoxContext &rc, guint state);
54 static void sp_3dbox_finish(SP3DBoxContext *rc);
56 static SPEventContextClass *parent_class;
59 GtkType sp_3dbox_context_get_type()
60 {
61 static GType type = 0;
62 if (!type) {
63 GTypeInfo info = {
64 sizeof(SP3DBoxContextClass),
65 NULL, NULL,
66 (GClassInitFunc) sp_3dbox_context_class_init,
67 NULL, NULL,
68 sizeof(SP3DBoxContext),
69 4,
70 (GInstanceInitFunc) sp_3dbox_context_init,
71 NULL, /* value_table */
72 };
73 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SP3DBoxContext", &info, (GTypeFlags) 0);
74 }
75 return type;
76 }
78 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass)
79 {
80 GObjectClass *object_class = (GObjectClass *) klass;
81 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
83 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
85 object_class->dispose = sp_3dbox_context_dispose;
87 event_context_class->setup = sp_3dbox_context_setup;
88 event_context_class->set = sp_3dbox_context_set;
89 event_context_class->root_handler = sp_3dbox_context_root_handler;
90 event_context_class->item_handler = sp_3dbox_context_item_handler;
91 }
93 Box3D::Perspective3D * SP3DBoxContext::current_perspective = NULL;
95 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context)
96 {
97 SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
99 event_context->cursor_shape = cursor_rect_xpm;
100 event_context->hot_x = 4;
101 event_context->hot_y = 4;
102 event_context->xp = 0;
103 event_context->yp = 0;
104 event_context->tolerance = 0;
105 event_context->within_tolerance = false;
106 event_context->item_to_select = NULL;
108 event_context->shape_repr = NULL;
109 event_context->shape_knot_holder = NULL;
111 box3d_context->item = NULL;
113 box3d_context->rx = 0.0;
114 box3d_context->ry = 0.0;
116 box3d_context->ctrl_dragged = false;
117 box3d_context->extruded = false;
119 /* create an initial perspective */
120 if (!SP3DBoxContext::current_perspective) {
121 SP3DBoxContext::current_perspective = new Box3D::Perspective3D (
122 // VP in x-direction
123 Box3D::VanishingPoint( NR::Point( 50.0, 600.0),
124 NR::Point( -1.0, 0.0), Box3D::VP_INFINITE),
125 // VP in y-direction
126 Box3D::VanishingPoint( NR::Point(500.0,1000.0),
127 NR::Point( 0.0, 1.0), Box3D::VP_INFINITE),
128 // VP in z-direction
129 Box3D::VanishingPoint( NR::Point(700.0, 500.0),
130 NR::Point(sqrt(3.0),1.0), Box3D::VP_INFINITE));
131 }
133 new (&box3d_context->sel_changed_connection) sigc::connection();
134 }
136 static void sp_3dbox_context_dispose(GObject *object)
137 {
138 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(object);
139 SPEventContext *ec = SP_EVENT_CONTEXT(object);
141 ec->enableGrDrag(false);
143 rc->sel_changed_connection.disconnect();
144 rc->sel_changed_connection.~connection();
146 /* fixme: This is necessary because we do not grab */
147 if (rc->item) {
148 sp_3dbox_finish(rc);
149 }
151 if (ec->shape_knot_holder) {
152 sp_knot_holder_destroy(ec->shape_knot_holder);
153 ec->shape_knot_holder = NULL;
154 }
156 if (ec->shape_repr) { // remove old listener
157 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
158 Inkscape::GC::release(ec->shape_repr);
159 ec->shape_repr = 0;
160 }
162 if (rc->_message_context) {
163 delete rc->_message_context;
164 }
166 G_OBJECT_CLASS(parent_class)->dispose(object);
167 }
169 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
170 NULL, /* child_added */
171 NULL, /* child_removed */
172 ec_shape_event_attr_changed,
173 NULL, /* content_changed */
174 NULL /* order_changed */
175 };
177 /**
178 \brief Callback that processes the "changed" signal on the selection;
179 destroys old and creates new knotholder
180 */
181 void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)
182 {
183 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(data);
184 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
186 if (ec->shape_knot_holder) { // destroy knotholder
187 sp_knot_holder_destroy(ec->shape_knot_holder);
188 ec->shape_knot_holder = NULL;
189 }
191 if (ec->shape_repr) { // remove old listener
192 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
193 Inkscape::GC::release(ec->shape_repr);
194 ec->shape_repr = 0;
195 }
197 SPItem *item = selection->singleItem();
198 if (item) {
199 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
200 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
201 if (shape_repr) {
202 ec->shape_repr = shape_repr;
203 Inkscape::GC::anchor(shape_repr);
204 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
205 }
206 }
207 }
209 static void sp_3dbox_context_setup(SPEventContext *ec)
210 {
211 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);
213 if (((SPEventContextClass *) parent_class)->setup) {
214 ((SPEventContextClass *) parent_class)->setup(ec);
215 }
217 SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
218 if (item) {
219 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
220 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
221 if (shape_repr) {
222 ec->shape_repr = shape_repr;
223 Inkscape::GC::anchor(shape_repr);
224 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
225 }
226 }
228 rc->sel_changed_connection.disconnect();
229 rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
230 sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)rc)
231 );
233 sp_event_context_read(ec, "rx");
234 sp_event_context_read(ec, "ry");
236 if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
237 ec->enableSelectionCue();
238 }
240 if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
241 ec->enableGrDrag();
242 }
244 rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
245 }
247 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
248 {
249 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);
251 /* fixme: Proper error handling for non-numeric data. Use a locale-independent function like
252 * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
253 if ( strcmp(key, "rx") == 0 ) {
254 rc->rx = ( val
255 ? g_ascii_strtod (val, NULL)
256 : 0.0 );
257 } else if ( strcmp(key, "ry") == 0 ) {
258 rc->ry = ( val
259 ? g_ascii_strtod (val, NULL)
260 : 0.0 );
261 }
262 }
264 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
265 {
266 SPDesktop *desktop = event_context->desktop;
268 gint ret = FALSE;
270 switch (event->type) {
271 case GDK_BUTTON_PRESS:
272 if ( event->button.button == 1 ) {
273 Inkscape::setup_for_drag_start(desktop, event_context, event);
274 ret = TRUE;
275 }
276 break;
277 // motion and release are always on root (why?)
278 default:
279 break;
280 }
282 if (((SPEventContextClass *) parent_class)->item_handler) {
283 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
284 }
286 return ret;
287 }
289 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)
290 {
291 static bool dragging;
293 SPDesktop *desktop = event_context->desktop;
294 Inkscape::Selection *selection = sp_desktop_selection (desktop);
296 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(event_context);
298 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
300 gint ret = FALSE;
301 switch (event->type) {
302 case GDK_BUTTON_PRESS:
303 if ( event->button.button == 1 ) {
304 NR::Point const button_w(event->button.x,
305 event->button.y);
307 // save drag origin
308 event_context->xp = (gint) button_w[NR::X];
309 event_context->yp = (gint) button_w[NR::Y];
310 event_context->within_tolerance = true;
312 // remember clicked item, disregarding groups, honoring Alt
313 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
315 dragging = true;
317 /* Position center */
318 NR::Point const button_dt(desktop->w2d(button_w));
319 rc->drag_origin = button_dt;
320 rc->drag_ptB = button_dt;
321 rc->drag_ptC = button_dt;
323 /* Snap center */
324 SnapManager const &m = desktop->namedview->snap_manager;
325 rc->center = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
326 button_dt, rc->item).getPoint();
328 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
329 ( GDK_KEY_PRESS_MASK |
330 GDK_BUTTON_RELEASE_MASK |
331 GDK_POINTER_MOTION_MASK |
332 GDK_BUTTON_PRESS_MASK ),
333 NULL, event->button.time);
334 ret = TRUE;
335 }
336 break;
337 case GDK_MOTION_NOTIFY:
338 if ( dragging
339 && ( event->motion.state & GDK_BUTTON1_MASK ) )
340 {
341 if ( event_context->within_tolerance
342 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
343 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
344 break; // do not drag if we're within tolerance from origin
345 }
346 // Once the user has moved farther than tolerance from the original location
347 // (indicating they intend to draw, not click), then always process the
348 // motion notify coordinates as given (no snapping back to origin)
349 event_context->within_tolerance = false;
351 NR::Point const motion_w(event->motion.x,
352 event->motion.y);
353 NR::Point motion_dt(desktop->w2d(motion_w));
355 SnapManager const &m = desktop->namedview->snap_manager;
356 motion_dt = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, motion_dt, rc->item).getPoint();
358 rc->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK;
360 if (event->motion.state & GDK_SHIFT_MASK && !rc->extruded) {
361 /* once shift is pressed, set rc->extruded and create the remaining faces */
362 rc->extruded = true;
364 /* The separate faces */
365 SP3DBox *box3d = SP_3DBOX(rc->item);
366 for (int i = 0; i < 6; ++i) {
367 if (i == 4 || box3d->faces[i]) continue;
368 box3d->faces[i] = new Box3DFace (box3d);
369 box3d->faces[i]->hook_path_to_3dbox();
370 }
371 }
373 if (!rc->extruded) {
374 rc->drag_ptB = motion_dt;
375 } else {
376 // Without Ctrl, motion of the extruded corner is constrained to the
377 // perspective line from drag_ptB to vanishing point Y.
378 if (!rc->ctrl_dragged) {
379 rc->drag_ptC = Box3D::perspective_line_snap (rc->drag_ptB, Box3D::Z, motion_dt);
380 } else {
381 rc->drag_ptC = motion_dt;
382 }
383 rc->drag_ptC = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, rc->drag_ptC, rc->item).getPoint();
384 if (rc->ctrl_dragged) {
385 Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y);
386 Box3D::PerspectiveLine pl2 (rc->drag_ptB, Box3D::X);
387 NR::Point corner1 = pl1.meet(pl2);
389 Box3D::PerspectiveLine pl3 (corner1, Box3D::X);
390 Box3D::PerspectiveLine pl4 (rc->drag_ptC, Box3D::Z);
391 rc->drag_ptB = pl3.meet(pl4);
392 }
393 }
396 sp_3dbox_drag(*rc, event->motion.state);
398 ret = TRUE;
399 }
400 ret = TRUE;
401 break;
402 case GDK_BUTTON_RELEASE:
403 event_context->xp = event_context->yp = 0;
404 if ( event->button.button == 1 ) {
405 dragging = false;
407 if (!event_context->within_tolerance) {
408 // we've been dragging, finish the rect
409 sp_3dbox_finish(rc);
410 } else if (event_context->item_to_select) {
411 // no dragging, select clicked item if any
412 if (event->button.state & GDK_SHIFT_MASK) {
413 selection->toggle(event_context->item_to_select);
414 } else {
415 selection->set(event_context->item_to_select);
416 }
417 } else {
418 // click in an empty space
419 selection->clear();
420 }
422 event_context->item_to_select = NULL;
423 ret = TRUE;
424 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
425 event->button.time);
426 }
427 break;
428 case GDK_KEY_PRESS:
429 switch (get_group0_keyval (&event->key)) {
430 case GDK_Alt_L:
431 case GDK_Alt_R:
432 case GDK_Control_L:
433 case GDK_Control_R:
434 case GDK_Shift_L:
435 case GDK_Shift_R:
436 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
437 case GDK_Meta_R:
438 if (!dragging){
439 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
440 _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
441 _("<b>Shift</b>: draw around the starting point"),
442 NULL);
443 }
444 break;
445 case GDK_Up:
446 case GDK_Down:
447 case GDK_KP_Up:
448 case GDK_KP_Down:
449 // prevent the zoom field from activation
450 if (!MOD__CTRL_ONLY)
451 ret = TRUE;
452 break;
454 case GDK_x:
455 case GDK_X:
456 if (MOD__ALT_ONLY) {
457 desktop->setToolboxFocusTo ("altx-rect");
458 ret = TRUE;
459 }
460 break;
462 case GDK_Escape:
463 sp_desktop_selection(desktop)->clear();
464 //TODO: make dragging escapable by Esc
465 break;
467 case GDK_space:
468 if (dragging) {
469 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
470 event->button.time);
471 dragging = false;
472 if (!event_context->within_tolerance) {
473 // we've been dragging, finish the rect
474 sp_3dbox_finish(rc);
475 }
476 // do not return true, so that space would work switching to selector
477 }
478 break;
480 default:
481 break;
482 }
483 break;
484 case GDK_KEY_RELEASE:
485 switch (get_group0_keyval (&event->key)) {
486 case GDK_Alt_L:
487 case GDK_Alt_R:
488 case GDK_Control_L:
489 case GDK_Control_R:
490 case GDK_Shift_L:
491 case GDK_Shift_R:
492 case GDK_Meta_L: // Meta is when you press Shift+Alt
493 case GDK_Meta_R:
494 event_context->defaultMessageContext()->clear();
495 break;
496 default:
497 break;
498 }
499 break;
500 default:
501 break;
502 }
504 if (!ret) {
505 if (((SPEventContextClass *) parent_class)->root_handler) {
506 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
507 }
508 }
510 return ret;
511 }
513 static void sp_3dbox_drag(SP3DBoxContext &rc, guint state)
514 {
515 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
517 if (!rc.item) {
519 if (Inkscape::have_viable_layer(desktop, rc._message_context) == false) {
520 return;
521 }
523 /* Create object */
524 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&rc));
525 Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
526 repr->setAttribute("sodipodi:type", "inkscape:3dbox");
528 /* Set style */
529 //sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
531 rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
532 Inkscape::GC::release(repr);
533 rc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
535 /* Hook path to the only currenctly existing face */
536 SP_3DBOX(rc.item)->faces[4]->hook_path_to_3dbox();
538 rc.item->updateRepr();
540 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
541 }
543 // FIXME: remove these extra points
544 NR::Point pt = rc.drag_ptB;
545 NR::Point shift_pt = rc.drag_ptC;
547 NR::Rect r;
548 if (!(state & GDK_SHIFT_MASK)) {
549 r = Inkscape::snap_rectangular_box(desktop, rc.item, pt, rc.center, state);
550 } else {
551 r = Inkscape::snap_rectangular_box(desktop, rc.item, shift_pt, rc.center, state);
552 }
554 /*** artefacts of rect ***
555 if ( rc.rx != 0.0 ) {
556 sp_3dbox_set_rx (SP_3DBOX(rc.item), TRUE, rc.rx);
557 }
558 if ( rc.ry != 0.0 ) {
559 if (rc.rx == 0.0)
560 sp_3dbox_set_ry (SP_3DBOX(rc.item), TRUE, CLAMP(rc.ry, 0, MIN(r.dimensions()[NR::X], r.dimensions()[NR::Y])/2));
561 else
562 sp_3dbox_set_ry (SP_3DBOX(rc.item), TRUE, CLAMP(rc.ry, 0, r.dimensions()[NR::Y]));
563 }
564 ***/
566 SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
567 NR::Point origin_w(ec->xp, ec->yp);
568 NR::Point origin(desktop->w2d(origin_w));
569 sp_3dbox_position_set(rc);
571 // status text
572 GString *xs = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::X], desktop->namedview->getDefaultMetric());
573 GString *ys = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::Y], desktop->namedview->getDefaultMetric());
574 rc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Rectangle</b>: %s × %s; with <b>Ctrl</b> to make square or integer-ratio rectangle; with <b>Shift</b> to draw around the starting point"), xs->str, ys->str);
575 g_string_free(xs, FALSE);
576 g_string_free(ys, FALSE);
577 }
579 static void sp_3dbox_finish(SP3DBoxContext *rc)
580 {
581 rc->_message_context->clear();
583 if ( rc->item != NULL ) {
584 SPDesktop * desktop;
586 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
588 SP_OBJECT(rc->item)->updateRepr();
590 sp_canvas_end_forced_full_redraws(desktop->canvas);
592 sp_desktop_selection(desktop)->set(rc->item);
593 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
594 _("Create 3d box"));
596 rc->item = NULL;
597 }
599 rc->ctrl_dragged = false;
600 rc->extruded = false;
601 }
603 /*
604 Local Variables:
605 mode:c++
606 c-file-style:"stroustrup"
607 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
608 indent-tabs-mode:nil
609 fill-column:99
610 End:
611 */
612 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :