a25b39961dd406bc0b1b72e0b07b7e08c08e426f
1 #define __SP_RECT_CONTEXT_C__
3 /*
4 * Rectangle drawing context
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
11 * Copyright (C) 2000-2005 authors
12 * Copyright (C) 2000-2001 Ximian, Inc.
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include "config.h"
18 #include "inkscape.h"
20 #include <gdk/gdkkeysyms.h>
21 #include <cstring>
22 #include <string>
24 #include "macros.h"
25 #include "display/sp-canvas.h"
26 #include "display/snap-indicator.h"
27 #include "sp-rect.h"
28 #include "document.h"
29 #include "sp-namedview.h"
30 #include "selection.h"
31 #include "selection-chemistry.h"
32 #include "desktop-handles.h"
33 #include "snap.h"
34 #include "desktop.h"
35 #include "desktop-style.h"
36 #include "message-context.h"
37 #include "pixmaps/cursor-rect.xpm"
38 #include "rect-context.h"
39 #include "sp-metrics.h"
40 #include <glibmm/i18n.h>
41 #include "object-edit.h"
42 #include "xml/repr.h"
43 #include "xml/node-event-vector.h"
44 #include "prefs-utils.h"
45 #include "context-fns.h"
47 //static const double goldenratio = 1.61803398874989484820; // golden ratio
49 static void sp_rect_context_class_init(SPRectContextClass *klass);
50 static void sp_rect_context_init(SPRectContext *rect_context);
51 static void sp_rect_context_dispose(GObject *object);
53 static void sp_rect_context_setup(SPEventContext *ec);
54 static void sp_rect_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
56 static gint sp_rect_context_root_handler(SPEventContext *event_context, GdkEvent *event);
57 static gint sp_rect_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
59 static void sp_rect_drag(SPRectContext &rc, NR::Point const pt, guint state);
60 static void sp_rect_finish(SPRectContext *rc);
62 static SPEventContextClass *parent_class;
65 GtkType sp_rect_context_get_type()
66 {
67 static GType type = 0;
68 if (!type) {
69 GTypeInfo info = {
70 sizeof(SPRectContextClass),
71 NULL, NULL,
72 (GClassInitFunc) sp_rect_context_class_init,
73 NULL, NULL,
74 sizeof(SPRectContext),
75 4,
76 (GInstanceInitFunc) sp_rect_context_init,
77 NULL, /* value_table */
78 };
79 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPRectContext", &info, (GTypeFlags) 0);
80 }
81 return type;
82 }
84 static void sp_rect_context_class_init(SPRectContextClass *klass)
85 {
86 GObjectClass *object_class = (GObjectClass *) klass;
87 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
89 parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
91 object_class->dispose = sp_rect_context_dispose;
93 event_context_class->setup = sp_rect_context_setup;
94 event_context_class->set = sp_rect_context_set;
95 event_context_class->root_handler = sp_rect_context_root_handler;
96 event_context_class->item_handler = sp_rect_context_item_handler;
97 }
99 static void sp_rect_context_init(SPRectContext *rect_context)
100 {
101 SPEventContext *event_context = SP_EVENT_CONTEXT(rect_context);
103 event_context->cursor_shape = cursor_rect_xpm;
104 event_context->hot_x = 4;
105 event_context->hot_y = 4;
106 event_context->xp = 0;
107 event_context->yp = 0;
108 event_context->tolerance = 0;
109 event_context->within_tolerance = false;
110 event_context->item_to_select = NULL;
112 event_context->shape_repr = NULL;
113 event_context->shape_knot_holder = NULL;
115 rect_context->item = NULL;
117 rect_context->rx = 0.0;
118 rect_context->ry = 0.0;
120 new (&rect_context->sel_changed_connection) sigc::connection();
121 }
123 static void sp_rect_context_dispose(GObject *object)
124 {
125 SPRectContext *rc = SP_RECT_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_rect_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_rect_context_selection_changed(Inkscape::Selection *selection, gpointer data)
169 {
170 SPRectContext *rc = SP_RECT_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_rect_context_setup(SPEventContext *ec)
197 {
198 SPRectContext *rc = SP_RECT_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_rect_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_rect_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
235 {
236 SPRectContext *rc = SP_RECT_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_rect_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_rect_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 SPRectContext *rc = SP_RECT_CONTEXT(event_context);
285 event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
287 desktop->snapindicator->remove_snappoint();
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, TRUE);
304 dragging = true;
306 /* Position center */
307 NR::Point const button_dt(desktop->w2d(button_w));
309 /* Snap center */
310 SnapManager const &m = desktop->namedview->snap_manager;
311 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, button_dt, rc->item);
312 rc->center = s.getPoint();
313 if (s.getDistance() < NR_HUGE) {
314 desktop->snapindicator->set_new_snappoint(s.getPoint().to_2geom());
315 }
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 Inkscape::SnappedPoint s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, rc->item);
346 motion_dt = s.getPoint();
347 if (s.getDistance() < NR_HUGE) {
348 desktop->snapindicator->set_new_snappoint(s.getPoint().to_2geom());
349 }
351 sp_rect_drag(*rc, motion_dt, event->motion.state);
352 gobble_motion_events(GDK_BUTTON1_MASK);
353 ret = TRUE;
354 }
355 break;
356 case GDK_BUTTON_RELEASE:
357 event_context->xp = event_context->yp = 0;
358 if (event->button.button == 1 && !event_context->space_panning) {
359 dragging = false;
361 if (!event_context->within_tolerance) {
362 // we've been dragging, finish the rect
363 sp_rect_finish(rc);
364 } else if (event_context->item_to_select) {
365 // no dragging, select clicked item if any
366 if (event->button.state & GDK_SHIFT_MASK) {
367 selection->toggle(event_context->item_to_select);
368 } else {
369 selection->set(event_context->item_to_select);
370 }
371 } else {
372 // click in an empty space
373 selection->clear();
374 }
376 event_context->item_to_select = NULL;
377 ret = TRUE;
378 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
379 event->button.time);
380 }
381 break;
382 case GDK_KEY_PRESS:
383 switch (get_group0_keyval (&event->key)) {
384 case GDK_Alt_L:
385 case GDK_Alt_R:
386 case GDK_Control_L:
387 case GDK_Control_R:
388 case GDK_Shift_L:
389 case GDK_Shift_R:
390 case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
391 case GDK_Meta_R:
392 if (!dragging){
393 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
394 _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
395 _("<b>Shift</b>: draw around the starting point"),
396 NULL);
397 }
398 break;
399 case GDK_Up:
400 case GDK_Down:
401 case GDK_KP_Up:
402 case GDK_KP_Down:
403 // prevent the zoom field from activation
404 if (!MOD__CTRL_ONLY)
405 ret = TRUE;
406 break;
408 case GDK_x:
409 case GDK_X:
410 if (MOD__ALT_ONLY) {
411 desktop->setToolboxFocusTo ("altx-rect");
412 ret = TRUE;
413 }
414 break;
416 case GDK_T:
417 {
418 Inkscape::Selection *selection = sp_desktop_selection (inkscape_active_desktop());
419 SPItem *item = selection->singleItem();
420 if (item && SP_IS_RECT (item)) {
421 g_print ("Scaling transformation matrix\n");
422 SP_RECT (item)->transform = NR::Matrix(NR::scale(1.25, 1.5));
423 SP_OBJECT (item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
424 }
425 ret = TRUE;
426 }
427 break;
429 case GDK_g:
430 case GDK_G:
431 if (MOD__SHIFT_ONLY) {
432 sp_selection_to_guides();
433 ret = true;
434 }
435 break;
437 case GDK_Escape:
438 sp_desktop_selection(desktop)->clear();
439 //TODO: make dragging escapable by Esc
440 break;
442 case GDK_space:
443 if (dragging) {
444 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
445 event->button.time);
446 dragging = false;
447 if (!event_context->within_tolerance) {
448 // we've been dragging, finish the rect
449 sp_rect_finish(rc);
450 }
451 // do not return true, so that space would work switching to selector
452 }
453 break;
455 default:
456 break;
457 }
458 break;
459 case GDK_KEY_RELEASE:
460 switch (get_group0_keyval (&event->key)) {
461 case GDK_Alt_L:
462 case GDK_Alt_R:
463 case GDK_Control_L:
464 case GDK_Control_R:
465 case GDK_Shift_L:
466 case GDK_Shift_R:
467 case GDK_Meta_L: // Meta is when you press Shift+Alt
468 case GDK_Meta_R:
469 event_context->defaultMessageContext()->clear();
470 break;
471 default:
472 break;
473 }
474 break;
475 default:
476 break;
477 }
479 if (!ret) {
480 if (((SPEventContextClass *) parent_class)->root_handler) {
481 ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
482 }
483 }
485 return ret;
486 }
488 static void sp_rect_drag(SPRectContext &rc, NR::Point const pt, guint state)
489 {
490 SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
492 if (!rc.item) {
494 if (Inkscape::have_viable_layer(desktop, rc._message_context) == false) {
495 return;
496 }
498 /* Create object */
499 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&rc));
500 Inkscape::XML::Node *repr = xml_doc->createElement("svg:rect");
502 /* Set style */
503 sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.rect", false);
505 rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
506 Inkscape::GC::release(repr);
507 rc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
508 rc.item->updateRepr();
510 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
511 }
513 NR::Rect const r = Inkscape::snap_rectangular_box(desktop, rc.item, pt, rc.center, state);
515 sp_rect_position_set(SP_RECT(rc.item), r.min()[NR::X], r.min()[NR::Y], r.dimensions()[NR::X], r.dimensions()[NR::Y]);
516 if ( rc.rx != 0.0 ) {
517 sp_rect_set_rx (SP_RECT(rc.item), TRUE, rc.rx);
518 }
519 if ( rc.ry != 0.0 ) {
520 if (rc.rx == 0.0)
521 sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, MIN(r.dimensions()[NR::X], r.dimensions()[NR::Y])/2));
522 else
523 sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, r.dimensions()[NR::Y]));
524 }
526 // status text
527 double rdimx = r.dimensions()[NR::X];
528 double rdimy = r.dimensions()[NR::Y];
529 GString *xs = SP_PX_TO_METRIC_STRING(rdimx, desktop->namedview->getDefaultMetric());
530 GString *ys = SP_PX_TO_METRIC_STRING(rdimy, desktop->namedview->getDefaultMetric());
531 if (state & GDK_CONTROL_MASK) {
532 int ratio_x, ratio_y;
533 bool is_golden_ratio = false;
534 if (fabs (rdimx) > fabs (rdimy)) {
535 if (fabs(rdimx / rdimy - goldenratio) < 1e-6) {
536 is_golden_ratio = true;
537 }
538 ratio_x = (int) rint (rdimx / rdimy);
539 ratio_y = 1;
540 } else {
541 if (fabs(rdimy / rdimx - goldenratio) < 1e-6) {
542 is_golden_ratio = true;
543 }
544 ratio_x = 1;
545 ratio_y = (int) rint (rdimy / rdimx);
546 }
547 if (!is_golden_ratio) {
548 rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to ratio %d:%d); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str, ratio_x, ratio_y);
549 } else {
550 if (ratio_y == 1) {
551 rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to golden ratio 1.618 : 1); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str);
552 } else {
553 rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to golden ratio 1 : 1.618); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str);
554 }
555 }
556 } else {
557 rc._message_context->setF(Inkscape::IMMEDIATE_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);
558 }
559 g_string_free(xs, FALSE);
560 g_string_free(ys, FALSE);
561 }
563 static void sp_rect_finish(SPRectContext *rc)
564 {
565 rc->_message_context->clear();
567 if ( rc->item != NULL ) {
568 SPDesktop * desktop;
570 desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
572 SP_OBJECT(rc->item)->updateRepr();
574 sp_canvas_end_forced_full_redraws(desktop->canvas);
576 sp_desktop_selection(desktop)->set(rc->item);
577 sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_RECT,
578 _("Create rectangle"));
580 rc->item = NULL;
581 }
582 }
584 /*
585 Local Variables:
586 mode:c++
587 c-file-style:"stroustrup"
588 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
589 indent-tabs-mode:nil
590 fill-column:99
591 End:
592 */
593 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :