3096ad17985c268d9e3ed897a8d62cb037082be4
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 &bc, guint state);
54 static void sp_3dbox_finish(SP3DBoxContext *bc);
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 guint SP3DBoxContext::number_of_handles = 3;
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->ctrl_dragged = false;
114 box3d_context->extruded = false;
116 box3d_context->_vpdrag = NULL;
118 new (&box3d_context->sel_changed_connection) sigc::connection();
119 }
121 static void sp_3dbox_context_dispose(GObject *object)
122 {
123 SP3DBoxContext *bc = SP_3DBOX_CONTEXT(object);
124 SPEventContext *ec = SP_EVENT_CONTEXT(object);
126 ec->enableGrDrag(false);
128 delete (bc->_vpdrag);
129 bc->_vpdrag = NULL;
131 bc->sel_changed_connection.disconnect();
132 bc->sel_changed_connection.~connection();
134 /* fixme: This is necessary because we do not grab */
135 if (bc->item) {
136 sp_3dbox_finish(bc);
137 }
139 if (ec->shape_knot_holder) {
140 sp_knot_holder_destroy(ec->shape_knot_holder);
141 ec->shape_knot_holder = NULL;
142 }
144 if (ec->shape_repr) { // remove old listener
145 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
146 Inkscape::GC::release(ec->shape_repr);
147 ec->shape_repr = 0;
148 }
150 if (bc->_message_context) {
151 delete bc->_message_context;
152 }
154 G_OBJECT_CLASS(parent_class)->dispose(object);
155 }
157 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
158 NULL, /* child_added */
159 NULL, /* child_removed */
160 ec_shape_event_attr_changed,
161 NULL, /* content_changed */
162 NULL /* order_changed */
163 };
165 /**
166 \brief Callback that processes the "changed" signal on the selection;
167 destroys old and creates new knotholder
168 */
169 void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)
170 {
171 SP3DBoxContext *bc = SP_3DBOX_CONTEXT(data);
172 SPEventContext *ec = SP_EVENT_CONTEXT(bc);
174 if (ec->shape_knot_holder) { // destroy knotholder
175 sp_knot_holder_destroy(ec->shape_knot_holder);
176 ec->shape_knot_holder = NULL;
177 }
179 if (ec->shape_repr) { // remove old listener
180 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
181 Inkscape::GC::release(ec->shape_repr);
182 ec->shape_repr = 0;
183 }
185 SPItem *item = selection->singleItem();
186 if (item) {
187 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
188 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
189 if (shape_repr) {
190 ec->shape_repr = shape_repr;
191 Inkscape::GC::anchor(shape_repr);
192 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
193 }
194 }
195 }
197 static void sp_3dbox_context_setup(SPEventContext *ec)
198 {
199 SP3DBoxContext *bc = SP_3DBOX_CONTEXT(ec);
201 if (((SPEventContextClass *) parent_class)->setup) {
202 ((SPEventContextClass *) parent_class)->setup(ec);
203 }
205 SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
206 if (item) {
207 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
208 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
209 if (shape_repr) {
210 ec->shape_repr = shape_repr;
211 Inkscape::GC::anchor(shape_repr);
212 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
213 }
214 }
216 bc->sel_changed_connection.disconnect();
217 bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
218 sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)bc)
219 );
221 bc->_vpdrag = new Box3D::VPDrag(ec->desktop);
223 if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
224 ec->enableSelectionCue();
225 }
227 if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
228 ec->enableGrDrag();
229 }
231 bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
232 }
234 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
235 {
236 //SP3DBoxContext *bc = SP_3DBOX_CONTEXT(ec);
238 /* fixme: Proper error handling for non-numeric data. Use a locale-independent function like
239 * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
240 /**
241 if ( strcmp(key, "rx") == 0 ) {
242 bc->rx = ( val
243 ? g_ascii_strtod (val, NULL)
244 : 0.0 );
245 } else if ( strcmp(key, "ry") == 0 ) {
246 bc->ry = ( val
247 ? g_ascii_strtod (val, NULL)
248 : 0.0 );
249 }
250 **/
251 }
253 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
254 {
255 SPDesktop *desktop = event_context->desktop;
257 gint ret = FALSE;
259 switch (event->type) {
260 case GDK_BUTTON_PRESS:
261 if ( event->button.button == 1 && !event_context->space_panning) {
262 Inkscape::setup_for_drag_start(desktop, event_context, event);
263 ret = TRUE;
264 }
265 break;
266 // motion and release are always on root (why?)
267 default:
268 break;
269 }
271 if (((SPEventContextClass *) parent_class)->item_handler) {
272 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
273 }
275 return ret;
276 }
278 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)
279 {
280 static bool dragging;
282 SPDesktop *desktop = event_context->desktop;
283 Inkscape::Selection *selection = sp_desktop_selection (desktop);
285 SP3DBoxContext *bc = SP_3DBOX_CONTEXT(event_context);
287 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
289 gint ret = FALSE;
290 switch (event->type) {
291 case GDK_BUTTON_PRESS:
292 if ( event->button.button == 1 && !event_context->space_panning) {
293 NR::Point const button_w(event->button.x,
294 event->button.y);
296 // save drag origin
297 event_context->xp = (gint) button_w[NR::X];
298 event_context->yp = (gint) button_w[NR::Y];
299 event_context->within_tolerance = true;
301 // remember clicked item, disregarding groups, honoring Alt
302 event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, event->button.state & GDK_CONTROL_MASK);
304 dragging = true;
306 /* Position center */
307 NR::Point const button_dt(desktop->w2d(button_w));
308 bc->drag_origin = button_dt;
309 bc->drag_ptB = button_dt;
310 bc->drag_ptC = button_dt;
312 /* Snap center */
313 SnapManager const &m = desktop->namedview->snap_manager;
314 bc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE | Inkscape::Snapper::SNAPPOINT_BBOX,
315 button_dt, bc->item).getPoint();
317 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
318 ( GDK_KEY_PRESS_MASK |
319 GDK_BUTTON_RELEASE_MASK |
320 GDK_POINTER_MOTION_MASK |
321 GDK_BUTTON_PRESS_MASK ),
322 NULL, event->button.time);
323 ret = TRUE;
324 }
325 break;
326 case GDK_MOTION_NOTIFY:
327 if ( dragging
328 && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
329 {
330 if ( event_context->within_tolerance
331 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
332 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
333 break; // do not drag if we're within tolerance from origin
334 }
335 // Once the user has moved farther than tolerance from the original location
336 // (indicating they intend to draw, not click), then always process the
337 // motion notify coordinates as given (no snapping back to origin)
338 event_context->within_tolerance = false;
340 NR::Point const motion_w(event->motion.x,
341 event->motion.y);
342 NR::Point motion_dt(desktop->w2d(motion_w));
344 SnapManager const &m = desktop->namedview->snap_manager;
345 motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, bc->item).getPoint();
347 bc->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK;
349 if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded) {
350 /* once shift is pressed, set bc->extruded (no need to create further faces;
351 all of them are already created in sp_3dbox_init) */
352 bc->extruded = true;
353 }
355 if (!bc->extruded) {
356 bc->drag_ptB = motion_dt;
357 bc->drag_ptC = motion_dt;
358 } else {
359 // Without Ctrl, motion of the extruded corner is constrained to the
360 // perspective line from drag_ptB to vanishing point Y.
361 if (!bc->ctrl_dragged) {
362 bc->drag_ptC = Box3D::perspective_line_snap (bc->drag_ptB, Box3D::Z, motion_dt, Box3D::Perspective3D::current_perspective);
363 } else {
364 bc->drag_ptC = motion_dt;
365 }
366 bc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, bc->drag_ptC, bc->item).getPoint();
367 if (bc->ctrl_dragged) {
368 Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y, Box3D::Perspective3D::current_perspective);
369 Box3D::PerspectiveLine pl2 (bc->drag_ptB, Box3D::X, Box3D::Perspective3D::current_perspective);
370 NR::Point corner1 = pl1.meet(pl2);
372 Box3D::PerspectiveLine pl3 (corner1, Box3D::X, Box3D::Perspective3D::current_perspective);
373 Box3D::PerspectiveLine pl4 (bc->drag_ptC, Box3D::Z, Box3D::Perspective3D::current_perspective);
374 bc->drag_ptB = pl3.meet(pl4);
375 }
376 }
379 sp_3dbox_drag(*bc, event->motion.state);
381 ret = TRUE;
382 }
383 break;
384 case GDK_BUTTON_RELEASE:
385 event_context->xp = event_context->yp = 0;
386 if ( event->button.button == 1 && !event_context->space_panning) {
387 dragging = false;
389 if (!event_context->within_tolerance) {
390 // we've been dragging, finish the box
391 sp_3dbox_finish(bc);
392 } else if (event_context->item_to_select) {
393 // no dragging, select clicked item if any
394 if (event->button.state & GDK_SHIFT_MASK) {
395 selection->toggle(event_context->item_to_select);
396 } else {
397 selection->set(event_context->item_to_select);
398 }
399 } else {
400 // click in an empty space
401 selection->clear();
402 }
404 event_context->item_to_select = NULL;
405 ret = TRUE;
406 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
407 event->button.time);
408 }
409 break;
410 case GDK_KEY_PRESS:
411 switch (get_group0_keyval (&event->key)) {
412 case GDK_Alt_L:
413 case GDK_Alt_R:
414 case GDK_Control_L:
415 case GDK_Control_R:
416 case GDK_Shift_L:
417 case GDK_Shift_R:
418 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
419 case GDK_Meta_R:
420 /***
421 if (!dragging){
422 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
423 _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
424 _("<b>Shift</b>: draw around the starting point"),
425 NULL);
426 }
427 ***/
428 break;
429 case GDK_Up:
430 case GDK_Down:
431 case GDK_KP_Up:
432 case GDK_KP_Down:
433 // prevent the zoom field from activation
434 if (!MOD__CTRL_ONLY)
435 ret = TRUE;
436 break;
438 case GDK_I:
439 Box3D::Perspective3D::print_debugging_info();
440 ret = true;
441 break;
443 case GDK_x:
444 case GDK_X:
445 if (MOD__ALT_ONLY) {
446 // desktop->setToolboxFocusTo ("altx-rect");
447 ret = TRUE;
448 }
449 break;
451 case GDK_Escape:
452 sp_desktop_selection(desktop)->clear();
453 //TODO: make dragging escapable by Esc
454 break;
456 case GDK_space:
457 if (dragging) {
458 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
459 event->button.time);
460 dragging = false;
461 if (!event_context->within_tolerance) {
462 // we've been dragging, finish the box
463 sp_3dbox_finish(bc);
464 }
465 // do not return true, so that space would work switching to selector
466 }
467 break;
469 default:
470 break;
471 }
472 break;
473 case GDK_KEY_RELEASE:
474 switch (get_group0_keyval (&event->key)) {
475 case GDK_Alt_L:
476 case GDK_Alt_R:
477 case GDK_Control_L:
478 case GDK_Control_R:
479 case GDK_Shift_L:
480 case GDK_Shift_R:
481 case GDK_Meta_L: // Meta is when you press Shift+Alt
482 case GDK_Meta_R:
483 event_context->defaultMessageContext()->clear();
484 break;
485 default:
486 break;
487 }
488 break;
489 default:
490 break;
491 }
493 if (!ret) {
494 if (((SPEventContextClass *) parent_class)->root_handler) {
495 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
496 }
497 }
499 return ret;
500 }
502 static void sp_3dbox_drag(SP3DBoxContext &bc, guint state)
503 {
504 SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
506 if (!bc.item) {
508 if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
509 return;
510 }
512 /* Create object */
513 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
514 Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
515 repr->setAttribute("sodipodi:type", "inkscape:3dbox");
517 /* Set style */
518 sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
520 bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
521 Inkscape::GC::release(repr);
522 bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
524 /* Hook paths to the faces of the box */
525 for (int i = 0; i < 6; ++i) {
526 SP_3DBOX(bc.item)->faces[i]->hook_path_to_3dbox();
527 }
529 bc.item->updateRepr();
530 // TODO: It would be nice to show the VPs during dragging, but since there is no selection
531 // at this point (only after finishing the box), we must do this "manually"
532 bc._vpdrag->updateDraggers();
534 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
535 }
537 // FIXME: remove these extra points
538 NR::Point pt = bc.drag_ptB;
539 NR::Point shift_pt = bc.drag_ptC;
541 NR::Rect r;
542 if (!(state & GDK_SHIFT_MASK)) {
543 r = Inkscape::snap_rectangular_box(desktop, bc.item, pt, bc.center, state);
544 } else {
545 r = Inkscape::snap_rectangular_box(desktop, bc.item, shift_pt, bc.center, state);
546 }
548 SPEventContext *ec = SP_EVENT_CONTEXT(&bc);
549 NR::Point origin_w(ec->xp, ec->yp);
550 NR::Point origin(desktop->w2d(origin_w));
551 sp_3dbox_position_set(bc);
553 // status text
554 //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
555 //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
556 bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
557 //g_string_free(Ax, FALSE);
558 //g_string_free(Ay, FALSE);
559 }
561 static void sp_3dbox_finish(SP3DBoxContext *bc)
562 {
563 bc->_message_context->clear();
565 if ( bc->item != NULL ) {
566 SPDesktop * desktop;
568 desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
570 SP_OBJECT(bc->item)->updateRepr();
571 sp_3dbox_set_ratios(SP_3DBOX(bc->item));
573 sp_canvas_end_forced_full_redraws(desktop->canvas);
575 sp_desktop_selection(desktop)->set(bc->item);
576 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
577 _("Create 3D box"));
579 bc->item = NULL;
580 }
582 bc->ctrl_dragged = false;
583 bc->extruded = false;
584 }
586 /*
587 Local Variables:
588 mode:c++
589 c-file-style:"stroustrup"
590 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
591 indent-tabs-mode:nil
592 fill-column:99
593 End:
594 */
595 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :