1 /** \file
2 * Pen event context implementation.
3 */
5 /*
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2000 Lauris Kaplinski
11 * Copyright (C) 2000-2001 Ximian, Inc.
12 * Copyright (C) 2002 Lauris Kaplinski
13 * Copyright (C) 2004 Monash University
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include <gdk/gdkkeysyms.h>
20 #include "pen-context.h"
21 #include "sp-namedview.h"
22 #include "sp-metrics.h"
23 #include "desktop.h"
24 #include "desktop-handles.h"
25 #include "selection.h"
26 #include "draw-anchor.h"
27 #include "message-stack.h"
28 #include "message-context.h"
29 #include "prefs-utils.h"
30 #include "sp-path.h"
32 #include "pixmaps/cursor-pen.xpm"
33 #include "display/canvas-bpath.h"
34 #include "display/sp-ctrlline.h"
35 #include "display/sodipodi-ctrl.h"
36 #include <glibmm/i18n.h>
37 #include "libnr/n-art-bpath.h"
38 #include "helper/units.h"
39 #include "macros.h"
40 #include "context-fns.h"
43 static void sp_pen_context_class_init(SPPenContextClass *klass);
44 static void sp_pen_context_init(SPPenContext *pc);
45 static void sp_pen_context_dispose(GObject *object);
47 static void sp_pen_context_setup(SPEventContext *ec);
48 static void sp_pen_context_finish(SPEventContext *ec);
49 static void sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
50 static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event);
52 static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
53 static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
54 static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
55 static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
57 static void spdc_pen_finish(SPPenContext *pc, gboolean closed);
59 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent);
60 static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent);
61 static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent);
62 static gint pen_handle_2button_press(SPPenContext *const pc);
63 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
64 static void spdc_reset_colors(SPPenContext *pc);
67 static NR::Point pen_drag_origin_w(0, 0);
68 static bool pen_within_tolerance = false;
70 static SPDrawContextClass *pen_parent_class;
72 /**
73 * Register SPPenContext with Gdk and return its type.
74 */
75 GType
76 sp_pen_context_get_type(void)
77 {
78 static GType type = 0;
79 if (!type) {
80 GTypeInfo info = {
81 sizeof(SPPenContextClass),
82 NULL, NULL,
83 (GClassInitFunc) sp_pen_context_class_init,
84 NULL, NULL,
85 sizeof(SPPenContext),
86 4,
87 (GInstanceInitFunc) sp_pen_context_init,
88 NULL, /* value_table */
89 };
90 type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0);
91 }
92 return type;
93 }
95 /**
96 * Initialize the SPPenContext vtable.
97 */
98 static void
99 sp_pen_context_class_init(SPPenContextClass *klass)
100 {
101 GObjectClass *object_class;
102 SPEventContextClass *event_context_class;
104 object_class = (GObjectClass *) klass;
105 event_context_class = (SPEventContextClass *) klass;
107 pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(klass);
109 object_class->dispose = sp_pen_context_dispose;
111 event_context_class->setup = sp_pen_context_setup;
112 event_context_class->finish = sp_pen_context_finish;
113 event_context_class->set = sp_pen_context_set;
114 event_context_class->root_handler = sp_pen_context_root_handler;
115 }
117 /**
118 * Callback to initialize SPPenContext object.
119 */
120 static void
121 sp_pen_context_init(SPPenContext *pc)
122 {
124 SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
126 event_context->cursor_shape = cursor_pen_xpm;
127 event_context->hot_x = 4;
128 event_context->hot_y = 4;
130 pc->npoints = 0;
131 pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
132 pc->state = SP_PEN_CONTEXT_POINT;
134 pc->c0 = NULL;
135 pc->c1 = NULL;
136 pc->cl0 = NULL;
137 pc->cl1 = NULL;
138 }
140 /**
141 * Callback to destroy the SPPenContext object's members and itself.
142 */
143 static void
144 sp_pen_context_dispose(GObject *object)
145 {
146 SPPenContext *pc;
148 pc = SP_PEN_CONTEXT(object);
150 if (pc->c0) {
151 gtk_object_destroy(GTK_OBJECT(pc->c0));
152 pc->c0 = NULL;
153 }
154 if (pc->c1) {
155 gtk_object_destroy(GTK_OBJECT(pc->c1));
156 pc->c1 = NULL;
157 }
158 if (pc->cl0) {
159 gtk_object_destroy(GTK_OBJECT(pc->cl0));
160 pc->cl0 = NULL;
161 }
162 if (pc->cl1) {
163 gtk_object_destroy(GTK_OBJECT(pc->cl1));
164 pc->cl1 = NULL;
165 }
167 G_OBJECT_CLASS(pen_parent_class)->dispose(object);
168 }
170 /**
171 * Callback to initialize SPPenContext object.
172 */
173 static void
174 sp_pen_context_setup(SPEventContext *ec)
175 {
176 SPPenContext *pc;
178 pc = SP_PEN_CONTEXT(ec);
180 if (((SPEventContextClass *) pen_parent_class)->setup) {
181 ((SPEventContextClass *) pen_parent_class)->setup(ec);
182 }
184 /* Pen indicators */
185 pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
186 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
187 pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
188 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
189 pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
190 sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
191 pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
192 sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
194 sp_canvas_item_hide(pc->c0);
195 sp_canvas_item_hide(pc->c1);
196 sp_canvas_item_hide(pc->cl0);
197 sp_canvas_item_hide(pc->cl1);
199 sp_event_context_read(ec, "mode");
201 pc->anchor_statusbar = false;
203 if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
204 ec->enableSelectionCue();
205 }
206 }
208 static void
209 pen_cancel (SPPenContext *const pc)
210 {
211 pc->state = SP_PEN_CONTEXT_STOP;
212 spdc_reset_colors(pc);
213 sp_canvas_item_hide(pc->c0);
214 sp_canvas_item_hide(pc->c1);
215 sp_canvas_item_hide(pc->cl0);
216 sp_canvas_item_hide(pc->cl1);
217 pc->_message_context->clear();
218 pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
219 }
221 /**
222 * Finalization callback.
223 */
224 static void
225 sp_pen_context_finish(SPEventContext *ec)
226 {
227 SPPenContext *pc = SP_PEN_CONTEXT(ec);
229 if (pc->npoints != 0) {
230 pen_cancel (pc);
231 }
233 if (((SPEventContextClass *) pen_parent_class)->finish) {
234 ((SPEventContextClass *) pen_parent_class)->finish(ec);
235 }
236 }
238 /**
239 * Callback that sets key to value in pen context.
240 */
241 static void
242 sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
243 {
244 SPPenContext *pc = SP_PEN_CONTEXT(ec);
246 if (!strcmp(key, "mode")) {
247 if ( val && !strcmp(val, "drag") ) {
248 pc->mode = SP_PEN_CONTEXT_MODE_DRAG;
249 } else {
250 pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
251 }
252 }
253 }
255 /**
256 * Snaps new node relative to the previous node.
257 */
258 static void
259 spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
260 {
261 if (pc->npoints > 0) {
262 spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
263 }
265 spdc_endpoint_snap_free(pc, p, state);
266 }
268 /**
269 * Snaps new node's handle relative to the new node.
270 */
271 static void
272 spdc_endpoint_snap_handle(SPPenContext const *const pc, NR::Point &p, guint const state)
273 {
274 g_return_if_fail(( pc->npoints == 2 ||
275 pc->npoints == 5 ));
277 spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
278 spdc_endpoint_snap_free(pc, p, state);
279 }
281 /**
282 * Callback to handle all pen events.
283 */
284 static gint
285 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
286 {
287 SPPenContext *const pc = SP_PEN_CONTEXT(ec);
289 gint ret = FALSE;
291 switch (event->type) {
292 case GDK_BUTTON_PRESS:
293 ret = pen_handle_button_press(pc, event->button);
294 break;
296 case GDK_MOTION_NOTIFY:
297 ret = pen_handle_motion_notify(pc, event->motion);
298 break;
300 case GDK_BUTTON_RELEASE:
301 ret = pen_handle_button_release(pc, event->button);
302 break;
304 case GDK_2BUTTON_PRESS:
305 ret = pen_handle_2button_press(pc);
306 break;
308 case GDK_KEY_PRESS:
309 ret = pen_handle_key_press(pc, event);
310 break;
312 default:
313 break;
314 }
316 if (!ret) {
317 gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
318 = ((SPEventContextClass *) pen_parent_class)->root_handler;
319 if (parent_root_handler) {
320 ret = parent_root_handler(ec, event);
321 }
322 }
324 return ret;
325 }
327 /**
328 * Handle mouse button press event.
329 */
330 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
331 {
332 gint ret = FALSE;
333 if (bevent.button == 1) {
335 SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
336 SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
338 if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
339 return TRUE;
340 }
342 NR::Point const event_w(bevent.x, bevent.y);
343 pen_drag_origin_w = event_w;
344 pen_within_tolerance = true;
346 /* Test whether we hit any anchor. */
347 SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
349 NR::Point const event_dt(desktop->w2d(event_w));
350 switch (pc->mode) {
351 case SP_PEN_CONTEXT_MODE_CLICK:
352 /* In click mode we add point on release */
353 switch (pc->state) {
354 case SP_PEN_CONTEXT_POINT:
355 case SP_PEN_CONTEXT_CONTROL:
356 case SP_PEN_CONTEXT_CLOSE:
357 break;
358 case SP_PEN_CONTEXT_STOP:
359 /* This is allowed, if we just cancelled curve */
360 pc->state = SP_PEN_CONTEXT_POINT;
361 break;
362 default:
363 break;
364 }
365 break;
366 case SP_PEN_CONTEXT_MODE_DRAG:
367 switch (pc->state) {
368 case SP_PEN_CONTEXT_STOP:
369 /* This is allowed, if we just cancelled curve */
370 case SP_PEN_CONTEXT_POINT:
371 if (pc->npoints == 0) {
373 /* Set start anchor */
374 pc->sa = anchor;
375 NR::Point p;
376 if (anchor) {
378 /* Adjust point to anchor if needed */
379 p = anchor->dp;
380 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
382 } else {
384 // This is the first click of a new curve; deselect item so that
385 // this curve is not combined with it (unless it is drawn from its
386 // anchor, which is handled by the sibling branch above)
387 Inkscape::Selection * const selection = sp_desktop_selection(desktop);
388 if (!(bevent.state & GDK_SHIFT_MASK)) {
390 selection->clear();
391 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
393 } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
395 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
396 }
398 /* Create green anchor */
399 p = event_dt;
400 spdc_endpoint_snap(pc, p, bevent.state);
401 pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
402 }
403 spdc_pen_set_initial_point(pc, p);
404 } else {
406 /* Set end anchor */
407 pc->ea = anchor;
408 NR::Point p;
409 if (anchor) {
411 p = anchor->dp;
412 // we hit an anchor, will finish the curve (either with or without closing)
413 // in release handler
414 pc->state = SP_PEN_CONTEXT_CLOSE;
416 if (pc->green_anchor && pc->green_anchor->active) {
417 // we clicked on the current curve start, so close it even if
418 // we drag a handle away from it
419 dc->green_closed = TRUE;
420 }
421 ret = TRUE;
422 break;
424 } else {
426 p = event_dt;
427 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
428 spdc_pen_set_subsequent_point(pc, p, true);
429 }
431 }
432 pc->state = SP_PEN_CONTEXT_CONTROL;
433 ret = TRUE;
434 break;
435 case SP_PEN_CONTEXT_CONTROL:
436 g_warning("Button down in CONTROL state");
437 break;
438 case SP_PEN_CONTEXT_CLOSE:
439 g_warning("Button down in CLOSE state");
440 break;
441 default:
442 break;
443 }
444 break;
445 default:
446 break;
447 }
448 } else if (bevent.button == 3) {
449 if (pc->npoints != 0) {
450 spdc_pen_finish(pc, FALSE);
451 ret = TRUE;
452 }
453 }
455 return ret;
456 }
458 /**
459 * Handle motion_notify event.
460 */
461 static gint
462 pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
463 {
464 gint ret = FALSE;
466 if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
467 // allow middle-button scrolling
468 return FALSE;
469 }
471 NR::Point const event_w(mevent.x,
472 mevent.y);
473 if (pen_within_tolerance) {
474 gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
475 "value", 0, 0, 100);
476 if ( NR::LInfty( event_w - pen_drag_origin_w ) < tolerance ) {
477 return FALSE; // Do not drag if we're within tolerance from origin.
478 }
479 }
480 // Once the user has moved farther than tolerance from the original location
481 // (indicating they intend to move the object, not click), then always process the
482 // motion notify coordinates as given (no snapping back to origin)
483 pen_within_tolerance = false;
485 SPDesktop *const dt = pc->desktop;
486 if ( ( mevent.state & GDK_BUTTON1_MASK ) && !pc->grab ) {
487 /* Grab mouse, so release will not pass unnoticed */
488 pc->grab = SP_CANVAS_ITEM(dt->acetate);
489 sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK |
490 GDK_BUTTON_RELEASE_MASK |
491 GDK_POINTER_MOTION_MASK ),
492 NULL, mevent.time);
493 }
495 /* Find desktop coordinates */
496 NR::Point p = dt->w2d(event_w);
498 /* Test, whether we hit any anchor */
499 SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
501 switch (pc->mode) {
502 case SP_PEN_CONTEXT_MODE_CLICK:
503 switch (pc->state) {
504 case SP_PEN_CONTEXT_POINT:
505 if ( pc->npoints != 0 ) {
506 /* Only set point, if we are already appending */
507 spdc_endpoint_snap(pc, p, mevent.state);
508 spdc_pen_set_subsequent_point(pc, p, true);
509 ret = TRUE;
510 }
511 break;
512 case SP_PEN_CONTEXT_CONTROL:
513 case SP_PEN_CONTEXT_CLOSE:
514 /* Placing controls is last operation in CLOSE state */
515 spdc_endpoint_snap(pc, p, mevent.state);
516 spdc_pen_set_ctrl(pc, p, mevent.state);
517 ret = TRUE;
518 break;
519 case SP_PEN_CONTEXT_STOP:
520 /* This is perfectly valid */
521 break;
522 default:
523 break;
524 }
525 break;
526 case SP_PEN_CONTEXT_MODE_DRAG:
527 switch (pc->state) {
528 case SP_PEN_CONTEXT_POINT:
529 if ( pc->npoints > 0 ) {
530 /* Only set point, if we are already appending */
532 if (!anchor) { /* Snap node only if not hitting anchor */
533 spdc_endpoint_snap(pc, p, mevent.state);
534 }
536 spdc_pen_set_subsequent_point(pc, p, !anchor);
538 if (anchor && !pc->anchor_statusbar) {
539 pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
540 pc->anchor_statusbar = true;
541 } else if (!anchor && pc->anchor_statusbar) {
542 pc->_message_context->clear();
543 pc->anchor_statusbar = false;
544 }
546 ret = TRUE;
547 } else {
548 if (anchor && !pc->anchor_statusbar) {
549 pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
550 pc->anchor_statusbar = true;
551 } else if (!anchor && pc->anchor_statusbar) {
552 pc->_message_context->clear();
553 pc->anchor_statusbar = false;
554 }
555 }
556 break;
557 case SP_PEN_CONTEXT_CONTROL:
558 case SP_PEN_CONTEXT_CLOSE:
559 /* Placing controls is last operation in CLOSE state */
561 // snap the handle
562 spdc_endpoint_snap_handle(pc, p, mevent.state);
564 spdc_pen_set_ctrl(pc, p, mevent.state);
565 ret = TRUE;
566 break;
567 case SP_PEN_CONTEXT_STOP:
568 /* This is perfectly valid */
569 break;
570 default:
571 break;
572 }
573 break;
574 default:
575 break;
576 }
577 return ret;
578 }
580 /**
581 * Handle mouse button release event.
582 */
583 static gint
584 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
585 {
586 gint ret = FALSE;
587 if ( revent.button == 1 ) {
589 SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
591 NR::Point const event_w(revent.x,
592 revent.y);
593 /* Find desktop coordinates */
594 NR::Point p = pc->desktop->w2d(event_w);
596 /* Test whether we hit any anchor. */
597 SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
599 switch (pc->mode) {
600 case SP_PEN_CONTEXT_MODE_CLICK:
601 switch (pc->state) {
602 case SP_PEN_CONTEXT_POINT:
603 if ( pc->npoints == 0 ) {
604 /* Start new thread only with button release */
605 if (anchor) {
606 p = anchor->dp;
607 }
608 pc->sa = anchor;
609 spdc_pen_set_initial_point(pc, p);
610 } else {
611 /* Set end anchor here */
612 pc->ea = anchor;
613 if (anchor) {
614 p = anchor->dp;
615 }
616 }
617 pc->state = SP_PEN_CONTEXT_CONTROL;
618 ret = TRUE;
619 break;
620 case SP_PEN_CONTEXT_CONTROL:
621 /* End current segment */
622 spdc_endpoint_snap(pc, p, revent.state);
623 spdc_pen_finish_segment(pc, p, revent.state);
624 pc->state = SP_PEN_CONTEXT_POINT;
625 ret = TRUE;
626 break;
627 case SP_PEN_CONTEXT_CLOSE:
628 /* End current segment */
629 if (!anchor) { /* Snap node only if not hitting anchor */
630 spdc_endpoint_snap(pc, p, revent.state);
631 }
632 spdc_pen_finish_segment(pc, p, revent.state);
633 spdc_pen_finish(pc, TRUE);
634 pc->state = SP_PEN_CONTEXT_POINT;
635 ret = TRUE;
636 break;
637 case SP_PEN_CONTEXT_STOP:
638 /* This is allowed, if we just cancelled curve */
639 pc->state = SP_PEN_CONTEXT_POINT;
640 ret = TRUE;
641 break;
642 default:
643 break;
644 }
645 break;
646 case SP_PEN_CONTEXT_MODE_DRAG:
647 switch (pc->state) {
648 case SP_PEN_CONTEXT_POINT:
649 case SP_PEN_CONTEXT_CONTROL:
650 spdc_endpoint_snap(pc, p, revent.state);
651 spdc_pen_finish_segment(pc, p, revent.state);
652 break;
653 case SP_PEN_CONTEXT_CLOSE:
654 spdc_endpoint_snap(pc, p, revent.state);
655 spdc_pen_finish_segment(pc, p, revent.state);
656 if (pc->green_closed) {
657 // finishing at the start anchor, close curve
658 spdc_pen_finish(pc, TRUE);
659 } else {
660 // finishing at some other anchor, finish curve but not close
661 spdc_pen_finish(pc, FALSE);
662 }
663 break;
664 case SP_PEN_CONTEXT_STOP:
665 /* This is allowed, if we just cancelled curve */
666 break;
667 default:
668 break;
669 }
670 pc->state = SP_PEN_CONTEXT_POINT;
671 ret = TRUE;
672 break;
673 default:
674 break;
675 }
677 if (pc->grab) {
678 /* Release grab now */
679 sp_canvas_item_ungrab(pc->grab, revent.time);
680 pc->grab = NULL;
681 }
683 ret = TRUE;
685 dc->green_closed = FALSE;
686 }
688 return ret;
689 }
691 static gint
692 pen_handle_2button_press(SPPenContext *const pc)
693 {
694 gint ret = FALSE;
695 if (pc->npoints != 0) {
696 spdc_pen_finish(pc, FALSE);
697 ret = TRUE;
698 }
699 return ret;
700 }
702 void
703 pen_redraw_all (SPPenContext *const pc)
704 {
705 // green
706 if (pc->green_bpaths) {
707 // remove old piecewise green canvasitems
708 while (pc->green_bpaths) {
709 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
710 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
711 }
712 // one canvas bpath for all of green_curve
713 SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
714 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
715 sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
717 pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
718 }
720 if (pc->green_anchor)
721 SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
723 sp_curve_reset(pc->red_curve);
724 sp_curve_moveto(pc->red_curve, pc->p[0]);
725 sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
726 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
728 // handles
729 if (pc->p[0] != pc->p[1]) {
730 SP_CTRL(pc->c1)->moveto(pc->p[1]);
731 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
732 sp_canvas_item_show (pc->c1);
733 sp_canvas_item_show (pc->cl1);
734 } else {
735 sp_canvas_item_hide (pc->c1);
736 sp_canvas_item_hide (pc->cl1);
737 }
739 NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
740 if (bpath) {
741 if (bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
742 SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
743 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
744 sp_canvas_item_show (pc->c0);
745 sp_canvas_item_show (pc->cl0);
746 } else {
747 sp_canvas_item_hide (pc->c0);
748 sp_canvas_item_hide (pc->cl0);
749 }
750 }
751 }
753 void
754 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
755 {
756 if (pc->npoints != 5)
757 return;
759 // green
760 NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
761 if (bpath) {
762 if (bpath->code == NR_CURVETO) {
763 bpath->x2 += x;
764 bpath->y2 += y;
765 }
766 bpath->x3 += x;
767 bpath->y3 += y;
768 } else {
769 // start anchor too
770 if (pc->green_anchor) {
771 pc->green_anchor->dp += NR::Point(x, y);
772 }
773 }
775 // red
776 pc->p[0] += NR::Point(x, y);
777 pc->p[1] += NR::Point(x, y);
778 pen_redraw_all(pc);
779 }
781 void
782 pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
783 {
784 pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
785 }
787 void
788 pen_lastpoint_tocurve (SPPenContext *const pc)
789 {
790 if (pc->npoints != 5)
791 return;
793 // red
794 NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
795 if (bpath && bpath->code == NR_CURVETO) {
796 pc->p[1] = pc->p[0] + (NR::Point(bpath->x3, bpath->y3) - NR::Point(bpath->x2, bpath->y2));
797 } else {
798 pc->p[1] = pc->p[0] + (pc->p[3] - pc->p[0])*(1/3);
799 }
801 pen_redraw_all(pc);
802 }
804 void
805 pen_lastpoint_toline (SPPenContext *const pc)
806 {
807 if (pc->npoints != 5)
808 return;
810 pc->p[1] = pc->p[0];
812 pen_redraw_all(pc);
813 }
816 static gint
817 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
818 {
819 gint ret = FALSE;
820 gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
822 switch (get_group0_keyval (&event->key)) {
824 case GDK_Left: // move last point left
825 case GDK_KP_Left:
826 case GDK_KP_4:
827 if (!MOD__CTRL) { // not ctrl
828 if (MOD__ALT) { // alt
829 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift
830 else pen_lastpoint_move_screen(pc, -1, 0); // no shift
831 }
832 else { // no alt
833 if (MOD__SHIFT) pen_lastpoint_move(pc, -10*nudge, 0); // shift
834 else pen_lastpoint_move(pc, -nudge, 0); // no shift
835 }
836 ret = TRUE;
837 }
838 break;
839 case GDK_Up: // move last point up
840 case GDK_KP_Up:
841 case GDK_KP_8:
842 if (!MOD__CTRL) { // not ctrl
843 if (MOD__ALT) { // alt
844 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift
845 else pen_lastpoint_move_screen(pc, 0, 1); // no shift
846 }
847 else { // no alt
848 if (MOD__SHIFT) pen_lastpoint_move(pc, 0, 10*nudge); // shift
849 else pen_lastpoint_move(pc, 0, nudge); // no shift
850 }
851 ret = TRUE;
852 }
853 break;
854 case GDK_Right: // move last point right
855 case GDK_KP_Right:
856 case GDK_KP_6:
857 if (!MOD__CTRL) { // not ctrl
858 if (MOD__ALT) { // alt
859 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift
860 else pen_lastpoint_move_screen(pc, 1, 0); // no shift
861 }
862 else { // no alt
863 if (MOD__SHIFT) pen_lastpoint_move(pc, 10*nudge, 0); // shift
864 else pen_lastpoint_move(pc, nudge, 0); // no shift
865 }
866 ret = TRUE;
867 }
868 break;
869 case GDK_Down: // move last point down
870 case GDK_KP_Down:
871 case GDK_KP_2:
872 if (!MOD__CTRL) { // not ctrl
873 if (MOD__ALT) { // alt
874 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift
875 else pen_lastpoint_move_screen(pc, 0, -1); // no shift
876 }
877 else { // no alt
878 if (MOD__SHIFT) pen_lastpoint_move(pc, 0, -10*nudge); // shift
879 else pen_lastpoint_move(pc, 0, -nudge); // no shift
880 }
881 ret = TRUE;
882 }
883 break;
885 case GDK_U:
886 case GDK_u:
887 if (MOD__SHIFT_ONLY) {
888 pen_lastpoint_tocurve(pc);
889 ret = TRUE;
890 }
891 break;
892 case GDK_L:
893 case GDK_l:
894 if (MOD__SHIFT_ONLY) {
895 pen_lastpoint_toline(pc);
896 ret = TRUE;
897 }
898 break;
900 case GDK_Return:
901 case GDK_KP_Enter:
902 if (pc->npoints != 0) {
903 spdc_pen_finish(pc, FALSE);
904 ret = TRUE;
905 }
906 break;
907 case GDK_Escape:
908 if (pc->npoints != 0) {
909 // if drawing, cancel, otherwise pass it up for deselecting
910 pen_cancel (pc);
911 ret = TRUE;
912 }
913 break;
914 case GDK_z:
915 case GDK_Z:
916 if (MOD__CTRL_ONLY && pc->npoints != 0) {
917 // if drawing, cancel, otherwise pass it up for undo
918 pen_cancel (pc);
919 ret = TRUE;
920 }
921 break;
922 case GDK_BackSpace:
923 case GDK_Delete:
924 case GDK_KP_Delete:
925 if (sp_curve_is_empty(pc->green_curve)) {
926 pen_cancel (pc);
927 ret = TRUE;
928 } else {
929 /* Reset red curve */
930 sp_curve_reset(pc->red_curve);
931 /* Destroy topmost green bpath */
932 if (pc->green_bpaths) {
933 if (pc->green_bpaths->data)
934 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
935 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
936 }
937 /* Get last segment */
938 NArtBpath const *const p = SP_CURVE_BPATH(pc->green_curve);
939 gint const e = SP_CURVE_LENGTH(pc->green_curve);
940 if ( e < 2 ) {
941 g_warning("Green curve length is %d", e);
942 break;
943 }
944 pc->p[0] = p[e - 2].c(3);
945 if (p[e - 1].code == NR_CURVETO) {
946 pc->p[1] = p[e - 1].c(1);
947 } else {
948 pc->p[1] = pc->p[0];
949 }
950 NR::Point const pt(( pc->npoints < 4
951 ? p[e - 1].c(3)
952 : pc->p[3] ));
953 pc->npoints = 2;
954 sp_curve_backspace(pc->green_curve);
955 sp_canvas_item_hide(pc->c0);
956 sp_canvas_item_hide(pc->c1);
957 sp_canvas_item_hide(pc->cl0);
958 sp_canvas_item_hide(pc->cl1);
959 pc->state = SP_PEN_CONTEXT_POINT;
960 spdc_pen_set_subsequent_point(pc, pt, true);
961 ret = TRUE;
962 }
963 break;
964 default:
965 break;
966 }
967 return ret;
968 }
970 static void
971 spdc_reset_colors(SPPenContext *pc)
972 {
973 /* Red */
974 sp_curve_reset(pc->red_curve);
975 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
976 /* Blue */
977 sp_curve_reset(pc->blue_curve);
978 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
979 /* Green */
980 while (pc->green_bpaths) {
981 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
982 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
983 }
984 sp_curve_reset(pc->green_curve);
985 if (pc->green_anchor) {
986 pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
987 }
988 pc->sa = NULL;
989 pc->ea = NULL;
990 pc->npoints = 0;
991 pc->red_curve_is_valid = false;
992 }
995 static void
996 spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
997 {
998 g_assert( pc->npoints == 0 );
1000 pc->p[0] = p;
1001 pc->p[1] = p;
1002 pc->npoints = 2;
1003 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1004 }
1006 static void
1007 spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
1008 {
1009 g_assert( pc->npoints != 0 );
1010 /* todo: Check callers to see whether 2 <= npoints is guaranteed. */
1012 pc->p[2] = p;
1013 pc->p[3] = p;
1014 pc->p[4] = p;
1015 pc->npoints = 5;
1016 sp_curve_reset(pc->red_curve);
1017 sp_curve_moveto(pc->red_curve, pc->p[0]);
1018 bool is_curve;
1019 if ( (pc->onlycurves)
1020 || ( pc->p[1] != pc->p[0] ) )
1021 {
1022 sp_curve_curveto(pc->red_curve, pc->p[1], p, p);
1023 is_curve = true;
1024 } else {
1025 sp_curve_lineto(pc->red_curve, p);
1026 is_curve = false;
1027 }
1028 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1030 if (statusbar) {
1031 // status text
1032 SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1033 NR::Point rel = p - pc->p[0];
1034 GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1035 double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1036 if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1037 angle = angle_to_compass (angle);
1038 pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path"), is_curve? "Curve segment" : "Line segment", angle, dist->str);
1039 g_string_free(dist, FALSE);
1040 }
1041 }
1043 static void
1044 spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
1045 {
1046 sp_canvas_item_show(pc->c1);
1047 sp_canvas_item_show(pc->cl1);
1049 if ( pc->npoints == 2 ) {
1050 pc->p[1] = p;
1051 sp_canvas_item_hide(pc->c0);
1052 sp_canvas_item_hide(pc->cl0);
1053 SP_CTRL(pc->c1)->moveto(pc->p[1]);
1054 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
1056 // status text
1057 SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1058 NR::Point rel = p - pc->p[0];
1059 GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1060 double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1061 if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1062 angle = angle_to_compass (angle);
1063 pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle"), angle, dist->str);
1064 g_string_free(dist, FALSE);
1066 } else if ( pc->npoints == 5 ) {
1067 pc->p[4] = p;
1068 sp_canvas_item_show(pc->c0);
1069 sp_canvas_item_show(pc->cl0);
1070 bool is_symm = false;
1071 if ( ( ( pc->mode == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
1072 ( ( pc->mode == SP_PEN_CONTEXT_MODE_DRAG ) && !( state & GDK_SHIFT_MASK ) ) ) {
1073 NR::Point delta = p - pc->p[3];
1074 pc->p[2] = pc->p[3] - delta;
1075 is_symm = true;
1076 sp_curve_reset(pc->red_curve);
1077 sp_curve_moveto(pc->red_curve, pc->p[0]);
1078 sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
1079 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1080 }
1081 SP_CTRL(pc->c0)->moveto(pc->p[2]);
1082 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]);
1083 SP_CTRL(pc->c1)->moveto(pc->p[4]);
1084 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]);
1086 // status text
1087 SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1088 NR::Point rel = p - pc->p[3];
1089 GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1090 double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1091 if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1092 angle = angle_to_compass (angle);
1093 pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only"), is_symm? "Curve handle, symmetric" : "Curve handle", angle, dist->str);
1094 g_string_free(dist, FALSE);
1096 } else {
1097 g_warning("Something bad happened - npoints is %d", pc->npoints);
1098 }
1099 }
1101 static void
1102 spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const state)
1103 {
1104 if (!sp_curve_empty(pc->red_curve)) {
1105 sp_curve_append_continuous(pc->green_curve, pc->red_curve, 0.0625);
1106 SPCurve *curve = sp_curve_copy(pc->red_curve);
1107 /// \todo fixme:
1108 SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
1109 sp_curve_unref(curve);
1110 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
1112 pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
1114 pc->p[0] = pc->p[3];
1115 pc->p[1] = pc->p[4];
1116 pc->npoints = 2;
1118 sp_curve_reset(pc->red_curve);
1119 }
1120 }
1122 static void
1123 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
1124 {
1125 SPDesktop *const desktop = pc->desktop;
1126 pc->_message_context->clear();
1127 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
1129 sp_curve_reset(pc->red_curve);
1130 spdc_concat_colors_and_flush(pc, closed);
1131 pc->sa = NULL;
1132 pc->ea = NULL;
1134 pc->npoints = 0;
1135 pc->state = SP_PEN_CONTEXT_POINT;
1137 sp_canvas_item_hide(pc->c0);
1138 sp_canvas_item_hide(pc->c1);
1139 sp_canvas_item_hide(pc->cl0);
1140 sp_canvas_item_hide(pc->cl1);
1142 if (pc->green_anchor) {
1143 pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1144 }
1145 }
1148 /*
1149 Local Variables:
1150 mode:c++
1151 c-file-style:"stroustrup"
1152 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1153 indent-tabs-mode:nil
1154 fill-column:99
1155 End:
1156 */
1157 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :