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 * Box3D::Perspective3D::current_perspective = NULL;
94 guint SP3DBoxContext::number_of_handles = 3;
96 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context)
97 {
98 SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
100 event_context->cursor_shape = cursor_rect_xpm;
101 event_context->hot_x = 4;
102 event_context->hot_y = 4;
103 event_context->xp = 0;
104 event_context->yp = 0;
105 event_context->tolerance = 0;
106 event_context->within_tolerance = false;
107 event_context->item_to_select = NULL;
109 event_context->shape_repr = NULL;
110 event_context->shape_knot_holder = NULL;
112 box3d_context->item = NULL;
114 box3d_context->rx = 0.0;
115 box3d_context->ry = 0.0;
117 box3d_context->ctrl_dragged = false;
118 box3d_context->extruded = false;
120 new (&box3d_context->sel_changed_connection) sigc::connection();
121 }
123 static void sp_3dbox_context_dispose(GObject *object)
124 {
125 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(object);
126 SPEventContext *ec = SP_EVENT_CONTEXT(object);
128 ec->enableGrDrag(false);
130 rc->sel_changed_connection.disconnect();
131 rc->sel_changed_connection.~connection();
133 /* fixme: This is necessary because we do not grab */
134 if (rc->item) {
135 sp_3dbox_finish(rc);
136 }
138 if (ec->shape_knot_holder) {
139 sp_knot_holder_destroy(ec->shape_knot_holder);
140 ec->shape_knot_holder = NULL;
141 }
143 if (ec->shape_repr) { // remove old listener
144 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
145 Inkscape::GC::release(ec->shape_repr);
146 ec->shape_repr = 0;
147 }
149 if (rc->_message_context) {
150 delete rc->_message_context;
151 }
153 G_OBJECT_CLASS(parent_class)->dispose(object);
154 }
156 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
157 NULL, /* child_added */
158 NULL, /* child_removed */
159 ec_shape_event_attr_changed,
160 NULL, /* content_changed */
161 NULL /* order_changed */
162 };
164 /**
165 \brief Callback that processes the "changed" signal on the selection;
166 destroys old and creates new knotholder
167 */
168 void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)
169 {
170 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(data);
171 SPEventContext *ec = SP_EVENT_CONTEXT(rc);
173 if (ec->shape_knot_holder) { // destroy knotholder
174 sp_knot_holder_destroy(ec->shape_knot_holder);
175 ec->shape_knot_holder = NULL;
176 }
178 if (ec->shape_repr) { // remove old listener
179 sp_repr_remove_listener_by_data(ec->shape_repr, ec);
180 Inkscape::GC::release(ec->shape_repr);
181 ec->shape_repr = 0;
182 }
184 SPItem *item = selection->singleItem();
185 if (item) {
186 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
187 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
188 if (shape_repr) {
189 ec->shape_repr = shape_repr;
190 Inkscape::GC::anchor(shape_repr);
191 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
192 }
193 }
194 }
196 static void sp_3dbox_context_setup(SPEventContext *ec)
197 {
198 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);
200 if (((SPEventContextClass *) parent_class)->setup) {
201 ((SPEventContextClass *) parent_class)->setup(ec);
202 }
204 SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
205 if (item) {
206 ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
207 Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
208 if (shape_repr) {
209 ec->shape_repr = shape_repr;
210 Inkscape::GC::anchor(shape_repr);
211 sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
212 }
213 }
215 rc->sel_changed_connection.disconnect();
216 rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
217 sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)rc)
218 );
220 sp_event_context_read(ec, "rx");
221 sp_event_context_read(ec, "ry");
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 rc->_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 *rc = 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 if ( strcmp(key, "rx") == 0 ) {
241 rc->rx = ( val
242 ? g_ascii_strtod (val, NULL)
243 : 0.0 );
244 } else if ( strcmp(key, "ry") == 0 ) {
245 rc->ry = ( val
246 ? g_ascii_strtod (val, NULL)
247 : 0.0 );
248 }
249 }
251 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
252 {
253 SPDesktop *desktop = event_context->desktop;
255 gint ret = FALSE;
257 switch (event->type) {
258 case GDK_BUTTON_PRESS:
259 if ( event->button.button == 1 && !event_context->space_panning) {
260 Inkscape::setup_for_drag_start(desktop, event_context, event);
261 ret = TRUE;
262 }
263 break;
264 // motion and release are always on root (why?)
265 default:
266 break;
267 }
269 if (((SPEventContextClass *) parent_class)->item_handler) {
270 ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
271 }
273 return ret;
274 }
276 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)
277 {
278 static bool dragging;
280 SPDesktop *desktop = event_context->desktop;
281 Inkscape::Selection *selection = sp_desktop_selection (desktop);
283 SP3DBoxContext *rc = SP_3DBOX_CONTEXT(event_context);
285 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
287 gint ret = FALSE;
288 switch (event->type) {
289 case GDK_BUTTON_PRESS:
290 if ( event->button.button == 1 && !event_context->space_panning) {
291 NR::Point const button_w(event->button.x,
292 event->button.y);
294 // save drag origin
295 event_context->xp = (gint) button_w[NR::X];
296 event_context->yp = (gint) button_w[NR::Y];
297 event_context->within_tolerance = true;
299 // remember clicked item, disregarding groups, honoring Alt
300 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);
302 dragging = true;
304 /* Position center */
305 NR::Point const button_dt(desktop->w2d(button_w));
306 rc->drag_origin = button_dt;
307 rc->drag_ptB = button_dt;
308 rc->drag_ptC = button_dt;
310 /* Snap center */
311 SnapManager const &m = desktop->namedview->snap_manager;
312 rc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE | Inkscape::Snapper::SNAPPOINT_BBOX,
313 button_dt, rc->item).getPoint();
315 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
316 ( GDK_KEY_PRESS_MASK |
317 GDK_BUTTON_RELEASE_MASK |
318 GDK_POINTER_MOTION_MASK |
319 GDK_BUTTON_PRESS_MASK ),
320 NULL, event->button.time);
321 ret = TRUE;
322 }
323 break;
324 case GDK_MOTION_NOTIFY:
325 if ( dragging
326 && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
327 {
328 if ( event_context->within_tolerance
329 && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
330 && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
331 break; // do not drag if we're within tolerance from origin
332 }
333 // Once the user has moved farther than tolerance from the original location
334 // (indicating they intend to draw, not click), then always process the
335 // motion notify coordinates as given (no snapping back to origin)
336 event_context->within_tolerance = false;
338 NR::Point const motion_w(event->motion.x,
339 event->motion.y);
340 NR::Point motion_dt(desktop->w2d(motion_w));
342 SnapManager const &m = desktop->namedview->snap_manager;
343 motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, rc->item).getPoint();
345 rc->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK;
347 if (event->motion.state & GDK_SHIFT_MASK && !rc->extruded) {
348 /* once shift is pressed, set rc->extruded (no need to create further faces;
349 all of them are already created in sp_3dbox_init) */
350 rc->extruded = true;
351 }
353 if (!rc->extruded) {
354 rc->drag_ptB = motion_dt;
355 rc->drag_ptC = motion_dt;
356 } else {
357 // Without Ctrl, motion of the extruded corner is constrained to the
358 // perspective line from drag_ptB to vanishing point Y.
359 if (!rc->ctrl_dragged) {
360 rc->drag_ptC = Box3D::perspective_line_snap (rc->drag_ptB, Box3D::Z, motion_dt, Box3D::Perspective3D::current_perspective);
361 } else {
362 rc->drag_ptC = motion_dt;
363 }
364 rc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, rc->drag_ptC, rc->item).getPoint();
365 if (rc->ctrl_dragged) {
366 Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y, Box3D::Perspective3D::current_perspective);
367 Box3D::PerspectiveLine pl2 (rc->drag_ptB, Box3D::X, Box3D::Perspective3D::current_perspective);
368 NR::Point corner1 = pl1.meet(pl2);
370 Box3D::PerspectiveLine pl3 (corner1, Box3D::X, Box3D::Perspective3D::current_perspective);
371 Box3D::PerspectiveLine pl4 (rc->drag_ptC, Box3D::Z, Box3D::Perspective3D::current_perspective);
372 rc->drag_ptB = pl3.meet(pl4);
373 }
374 }
377 sp_3dbox_drag(*rc, event->motion.state);
379 ret = TRUE;
380 }
381 break;
382 case GDK_BUTTON_RELEASE:
383 event_context->xp = event_context->yp = 0;
384 if ( event->button.button == 1 && !event_context->space_panning) {
385 dragging = false;
387 if (!event_context->within_tolerance) {
388 // we've been dragging, finish the box
389 sp_3dbox_finish(rc);
390 } else if (event_context->item_to_select) {
391 // no dragging, select clicked item if any
392 if (event->button.state & GDK_SHIFT_MASK) {
393 selection->toggle(event_context->item_to_select);
394 } else {
395 selection->set(event_context->item_to_select);
396 }
397 } else {
398 // click in an empty space
399 selection->clear();
400 }
402 event_context->item_to_select = NULL;
403 ret = TRUE;
404 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
405 event->button.time);
406 }
407 break;
408 case GDK_KEY_PRESS:
409 switch (get_group0_keyval (&event->key)) {
410 case GDK_Alt_L:
411 case GDK_Alt_R:
412 case GDK_Control_L:
413 case GDK_Control_R:
414 case GDK_Shift_L:
415 case GDK_Shift_R:
416 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
417 case GDK_Meta_R:
418 /***
419 if (!dragging){
420 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
421 _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
422 _("<b>Shift</b>: draw around the starting point"),
423 NULL);
424 }
425 ***/
426 break;
427 case GDK_Up:
428 case GDK_Down:
429 case GDK_KP_Up:
430 case GDK_KP_Down:
431 // prevent the zoom field from activation
432 if (!MOD__CTRL_ONLY)
433 ret = TRUE;
434 break;
436 case GDK_x:
437 case GDK_X:
438 if (MOD__ALT_ONLY) {
439 // desktop->setToolboxFocusTo ("altx-rect");
440 ret = TRUE;
441 }
442 break;
444 case GDK_Escape:
445 sp_desktop_selection(desktop)->clear();
446 //TODO: make dragging escapable by Esc
447 break;
449 case GDK_space:
450 if (dragging) {
451 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
452 event->button.time);
453 dragging = false;
454 if (!event_context->within_tolerance) {
455 // we've been dragging, finish the box
456 sp_3dbox_finish(rc);
457 }
458 // do not return true, so that space would work switching to selector
459 }
460 break;
462 default:
463 break;
464 }
465 break;
466 case GDK_KEY_RELEASE:
467 switch (get_group0_keyval (&event->key)) {
468 case GDK_Alt_L:
469 case GDK_Alt_R:
470 case GDK_Control_L:
471 case GDK_Control_R:
472 case GDK_Shift_L:
473 case GDK_Shift_R:
474 case GDK_Meta_L: // Meta is when you press Shift+Alt
475 case GDK_Meta_R:
476 event_context->defaultMessageContext()->clear();
477 break;
478 default:
479 break;
480 }
481 break;
482 default:
483 break;
484 }
486 if (!ret) {
487 if (((SPEventContextClass *) parent_class)->root_handler) {
488 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
489 }
490 }
492 return ret;
493 }
495 static void sp_3dbox_drag(SP3DBoxContext &bc, guint state)
496 {
497 SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
499 if (!bc.item) {
501 if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
502 return;
503 }
505 /* Create object */
506 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
507 Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
508 repr->setAttribute("sodipodi:type", "inkscape:3dbox");
510 /* Set style */
511 sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
513 bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
514 Inkscape::GC::release(repr);
515 bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
517 /* Hook paths to the faces of the box */
518 for (int i = 0; i < 6; ++i) {
519 SP_3DBOX(bc.item)->faces[i]->hook_path_to_3dbox();
520 }
522 bc.item->updateRepr();
524 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
525 }
527 // FIXME: remove these extra points
528 NR::Point pt = bc.drag_ptB;
529 NR::Point shift_pt = bc.drag_ptC;
531 NR::Rect r;
532 if (!(state & GDK_SHIFT_MASK)) {
533 r = Inkscape::snap_rectangular_box(desktop, bc.item, pt, bc.center, state);
534 } else {
535 r = Inkscape::snap_rectangular_box(desktop, bc.item, shift_pt, bc.center, state);
536 }
538 SPEventContext *ec = SP_EVENT_CONTEXT(&bc);
539 NR::Point origin_w(ec->xp, ec->yp);
540 NR::Point origin(desktop->w2d(origin_w));
541 sp_3dbox_position_set(bc);
543 // status text
544 //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
545 //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
546 bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
547 //g_string_free(Ax, FALSE);
548 //g_string_free(Ay, FALSE);
549 }
551 static void sp_3dbox_finish(SP3DBoxContext *rc)
552 {
553 rc->_message_context->clear();
555 if ( rc->item != NULL ) {
556 SPDesktop * desktop;
558 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
560 SP_OBJECT(rc->item)->updateRepr();
562 sp_canvas_end_forced_full_redraws(desktop->canvas);
564 sp_desktop_selection(desktop)->set(rc->item);
565 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
566 _("Create 3D box"));
568 rc->item = NULL;
569 }
571 rc->ctrl_dragged = false;
572 rc->extruded = false;
573 }
575 /*
576 Local Variables:
577 mode:c++
578 c-file-style:"stroustrup"
579 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
580 indent-tabs-mode:nil
581 fill-column:99
582 End:
583 */
584 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :