1 /** @file
2 * @brief Event handlers for SPDesktop
3 */
4 /* Author:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 *
7 * Copyright (C) 1999-2002 Lauris Kaplinski
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 */
12 #ifdef HAVE_CONFIG_H
13 # include <config.h>
14 #endif
15 #include <map>
16 #include <string>
17 #include <2geom/line.h>
18 #include <glibmm/i18n.h>
20 #include "desktop.h"
21 #include "desktop-handles.h"
22 #include "dialogs/dialog-events.h"
23 #include "display/canvas-axonomgrid.h"
24 #include "display/canvas-grid.h"
25 #include "display/guideline.h"
26 #include "display/snap-indicator.h"
27 #include "document.h"
28 #include "event-context.h"
29 #include "helper/action.h"
30 #include "helper/unit-menu.h"
31 #include "helper/units.h"
32 #include "message-context.h"
33 #include "preferences.h"
34 #include "snap.h"
35 #include "sp-guide.h"
36 #include "sp-metrics.h"
37 #include "sp-namedview.h"
38 #include "tools-switch.h"
39 #include "ui/dialog/guides.h"
40 #include "widgets/desktop-widget.h"
41 #include "xml/repr.h"
43 static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
44 static void init_extended();
46 /* Root item handler */
48 int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
49 {
50 static bool watch = false;
51 static bool first = true;
53 if ( first ) {
54 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
55 if ( prefs->getBool("/options/useextinput/value", true)
56 && prefs->getBool("/options/switchonextinput/value") ) {
57 watch = true;
58 init_extended();
59 }
60 first = false;
61 }
62 if ( watch ) {
63 snoop_extended(event, desktop);
64 }
66 return sp_event_context_root_handler(desktop->event_context, event);
67 }
69 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
70 {
71 static bool dragging = false;
72 static SPCanvasItem *guide = NULL;
73 static Geom::Point normal;
74 int wx, wy;
76 SPDesktop *desktop = dtw->desktop;
77 Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
79 gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
80 Geom::Point const event_win(wx, wy);
82 gint width, height;
83 gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
85 switch (event->type) {
86 case GDK_BUTTON_PRESS:
87 if (event->button.button == 1) {
88 dragging = true;
90 // FIXME: The snap delay mechanism won't work here, because it has been implemented for the event context. Dragging
91 // guides off the ruler will send event to the ruler and not to the context, which bypasses sp_event_context_snap_delay_handler
93 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
94 Geom::Point const event_dt(desktop->w2d(event_w));
96 // explicitly show guidelines; if I draw a guide, I want them on
97 sp_repr_set_boolean(repr, "showguides", TRUE);
98 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
100 // calculate the normal of the guidelines when dragged from the edges of rulers.
101 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
102 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
103 normal_bl_to_tr.normalize();
104 normal_tr_to_bl.normalize();
105 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
106 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
107 Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
108 if (event->button.state & GDK_CONTROL_MASK) {
109 // guidelines normal to gridlines
110 normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
111 normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
112 } else {
113 normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
114 normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
115 }
116 }
117 if (horiz) {
118 if (wx < 50) {
119 normal = normal_bl_to_tr;
120 } else if (wx > width - 50) {
121 normal = normal_tr_to_bl;
122 } else {
123 normal = Geom::Point(0.,1.);
124 }
125 } else {
126 if (wy < 50) {
127 normal = normal_bl_to_tr;
128 } else if (wy > height - 50) {
129 normal = normal_tr_to_bl;
130 } else {
131 normal = Geom::Point(1.,0.);
132 }
133 }
135 guide = sp_guideline_new(desktop->guides, event_dt, normal);
136 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
137 gdk_pointer_grab(widget->window, FALSE,
138 (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
139 NULL, NULL,
140 event->button.time);
141 }
142 break;
143 case GDK_MOTION_NOTIFY:
144 if (dragging) {
145 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
146 Geom::Point event_dt(desktop->w2d(event_w));
148 SnapManager &m = desktop->namedview->snap_manager;
149 m.setup(desktop);
150 // We only have a temporary guide which is not stored in our document yet.
151 // Because the guide snapper only looks in the document for guides to snap to,
152 // we don't have to worry about a guide snapping to itself here
153 m.guideFreeSnap(event_dt, normal, SP_DRAG_MOVE_ORIGIN);
155 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
156 desktop->set_coordinate_status(to_2geom(event_dt));
157 desktop->setPosition(to_2geom(event_dt));
158 }
159 break;
160 case GDK_BUTTON_RELEASE:
161 if (dragging && event->button.button == 1) {
162 gdk_pointer_ungrab(event->button.time);
163 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
164 Geom::Point event_dt(desktop->w2d(event_w));
166 SnapManager &m = desktop->namedview->snap_manager;
167 m.setup(desktop);
168 // We only have a temporary guide which is not stored in our document yet.
169 // Because the guide snapper only looks in the document for guides to snap to,
170 // we don't have to worry about a guide snapping to itself here
171 m.guideFreeSnap(event_dt, normal, SP_DRAG_MOVE_ORIGIN);
173 dragging = false;
175 sp_event_context_discard_delayed_snap_event(desktop->event_context);
177 gtk_object_destroy(GTK_OBJECT(guide));
178 guide = NULL;
179 if ((horiz ? wy : wx) >= 0) {
180 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
181 Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
182 sp_repr_set_point(repr, "orientation", normal);
183 sp_repr_set_point(repr, "position", from_2geom(event_dt));
184 SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
185 Inkscape::GC::release(repr);
186 sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
187 _("Create guide"));
188 }
189 desktop->set_coordinate_status(from_2geom(event_dt));
191 // A dt_ruler_event might be emitted when dragging a guide of the rulers
192 // while drawing a Bezier curve. In such a situation, we're already in that
193 // specific context and the snap delay is already active. We should interfere
194 // with that context and we should therefore leave the snap delay status
195 // as it is. So although it might have been set to active above on
196 // GDK_BUTTON_PRESS, we should not set it back to inactive here. That must be
197 // done by the context.
198 }
199 default:
200 break;
201 }
203 return FALSE;
204 }
206 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
207 {
208 return sp_dt_ruler_event(widget, event, dtw, true);
209 }
211 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
212 {
213 return sp_dt_ruler_event(widget, event, dtw, false);
214 }
216 static Geom::Point drag_origin;
217 static SPGuideDragType drag_type = SP_DRAG_NONE;
218 //static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the
219 // // drag origin to that location so that constrained movement is more intuitive
221 // Min distance from anchor to initiate rotation, measured in screenpixels
222 #define tol 40.0
224 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
225 {
226 static bool moved = false;
227 gint ret = FALSE;
229 SPGuide *guide = SP_GUIDE(data);
230 SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
232 switch (event->type) {
233 case GDK_2BUTTON_PRESS:
234 if (event->button.button == 1) {
235 drag_type = SP_DRAG_NONE;
236 sp_event_context_discard_delayed_snap_event(desktop->event_context);
237 sp_canvas_item_ungrab(item, event->button.time);
238 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
239 ret = TRUE;
240 }
241 break;
242 case GDK_BUTTON_PRESS:
243 if (event->button.button == 1) {
244 Geom::Point const event_w(event->button.x, event->button.y);
245 Geom::Point const event_dt(desktop->w2d(event_w));
247 // Due to the tolerance allowed when grabbing a guide, event_dt will generally
248 // be close to the guide but not just exactly on it. The drag origin calculated
249 // here must be exactly on the guide line though, otherwise
250 // small errors will occur once we snap, see
251 // https://bugs.launchpad.net/inkscape/+bug/333762
252 drag_origin = Geom::projection(event_dt, Geom::Line(guide->point_on_line, guide->angle()));
254 if (event->button.state & GDK_SHIFT_MASK) {
255 // with shift we rotate the guide
256 drag_type = SP_DRAG_ROTATE;
257 } else {
258 if (event->button.state & GDK_CONTROL_MASK) {
259 drag_type = SP_DRAG_MOVE_ORIGIN;
260 } else {
261 drag_type = SP_DRAG_TRANSLATE;
262 }
263 }
265 if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) {
266 sp_canvas_item_grab(item,
267 ( GDK_BUTTON_RELEASE_MASK |
268 GDK_BUTTON_PRESS_MASK |
269 GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
270 NULL,
271 event->button.time);
272 }
273 ret = TRUE;
274 }
275 break;
276 case GDK_MOTION_NOTIFY:
277 if (drag_type != SP_DRAG_NONE) {
278 Geom::Point const motion_w(event->motion.x,
279 event->motion.y);
280 Geom::Point motion_dt(desktop->w2d(motion_w));
282 // This is for snapping while dragging existing guidelines. New guidelines,
283 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
284 SnapManager &m = desktop->namedview->snap_manager;
285 m.setup(desktop, true, NULL, NULL, guide);
286 if (drag_type == SP_DRAG_MOVE_ORIGIN) {
287 // If we snap in guideConstrainedSnap() below, then motion_dt will
288 // be forced to be on the guide. If we don't snap however, then
289 // the origin should still be constrained to the guide. So let's do
290 // that explicitly first:
292 Geom::Line line(guide->point_on_line, guide->angle());
293 Geom::Coord t = line.nearestPoint(motion_dt);
294 motion_dt = line.pointAt(t);
295 m.guideConstrainedSnap(motion_dt, *guide);
296 } else {
297 m.guideFreeSnap(motion_dt, guide->normal_to_line, drag_type);
298 }
300 switch (drag_type) {
301 case SP_DRAG_TRANSLATE:
302 {
303 sp_guide_moveto(*guide, motion_dt, false);
304 break;
305 }
306 case SP_DRAG_ROTATE:
307 {
308 Geom::Point pt = motion_dt - guide->point_on_line;
309 double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
310 if (event->motion.state & GDK_CONTROL_MASK) {
311 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
312 unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
313 if (snaps) {
314 double sections = floor(angle * snaps / M_PI + .5);
315 angle = (M_PI / snaps) * sections;
316 }
317 }
318 sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), false);
319 break;
320 }
321 case SP_DRAG_MOVE_ORIGIN:
322 {
323 sp_guide_moveto(*guide, motion_dt, false);
324 break;
325 }
326 case SP_DRAG_NONE:
327 g_assert_not_reached();
328 break;
329 }
330 moved = true;
331 desktop->set_coordinate_status(from_2geom(motion_dt));
332 desktop->setPosition(from_2geom(motion_dt));
334 ret = TRUE;
335 }
336 break;
337 case GDK_BUTTON_RELEASE:
338 if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
339 if (moved) {
340 Geom::Point const event_w(event->button.x,
341 event->button.y);
342 Geom::Point event_dt(desktop->w2d(event_w));
344 SnapManager &m = desktop->namedview->snap_manager;
345 m.setup(desktop, true, NULL, NULL, guide);
346 if (drag_type == SP_DRAG_MOVE_ORIGIN) {
347 // If we snap in guideConstrainedSnap() below, then motion_dt will
348 // be forced to be on the guide. If we don't snap however, then
349 // the origin should still be constrained to the guide. So let's
350 // do that explicitly first:
351 Geom::Line line(guide->point_on_line, guide->angle());
352 Geom::Coord t = line.nearestPoint(event_dt);
353 event_dt = line.pointAt(t);
354 m.guideConstrainedSnap(event_dt, *guide);
355 } else {
356 m.guideFreeSnap(event_dt, guide->normal_to_line, drag_type);
357 }
359 if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
360 switch (drag_type) {
361 case SP_DRAG_TRANSLATE:
362 {
363 sp_guide_moveto(*guide, event_dt, true);
364 break;
365 }
366 case SP_DRAG_ROTATE:
367 {
368 Geom::Point pt = event_dt - guide->point_on_line;
369 double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
370 if (event->motion.state & GDK_CONTROL_MASK) {
371 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
372 unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
373 if (snaps) {
374 double sections = floor(angle * snaps / M_PI + .5);
375 angle = (M_PI / snaps) * sections;
376 }
377 }
378 sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), true);
379 break;
380 }
381 case SP_DRAG_MOVE_ORIGIN:
382 {
383 sp_guide_moveto(*guide, event_dt, true);
384 break;
385 }
386 case SP_DRAG_NONE:
387 g_assert_not_reached();
388 break;
389 }
390 sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
391 _("Move guide"));
392 } else {
393 /* Undo movement of any attached shapes. */
394 sp_guide_moveto(*guide, guide->point_on_line, false);
395 sp_guide_set_normal(*guide, guide->normal_to_line, false);
396 sp_guide_remove(guide);
397 sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
398 _("Delete guide"));
399 }
400 moved = false;
401 desktop->set_coordinate_status(from_2geom(event_dt));
402 desktop->setPosition (from_2geom(event_dt));
403 }
404 drag_type = SP_DRAG_NONE;
405 sp_event_context_discard_delayed_snap_event(desktop->event_context);
406 sp_canvas_item_ungrab(item, event->button.time);
407 ret=TRUE;
408 }
409 case GDK_ENTER_NOTIFY:
410 {
411 sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
413 // set move or rotate cursor
414 Geom::Point const event_w(event->crossing.x, event->crossing.y);
415 Geom::Point const event_dt(desktop->w2d(event_w));
417 if (event->crossing.state & GDK_SHIFT_MASK) {
418 GdkCursor *guide_cursor;
419 guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
420 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
421 gdk_cursor_unref(guide_cursor);
422 }
424 char *guide_description = sp_guide_description(guide);
425 desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
426 g_free(guide_description);
427 break;
428 }
429 case GDK_LEAVE_NOTIFY:
430 sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
432 // restore event context's cursor
433 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, desktop->event_context->cursor);
435 desktop->guidesMessageContext()->clear();
436 break;
437 case GDK_KEY_PRESS:
438 switch (get_group0_keyval (&event->key)) {
439 case GDK_Delete:
440 case GDK_KP_Delete:
441 case GDK_BackSpace:
442 {
443 SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
444 sp_guide_remove(guide);
445 sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
446 ret = TRUE;
447 break;
448 }
449 case GDK_Shift_L:
450 case GDK_Shift_R:
451 GdkCursor *guide_cursor;
452 guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
453 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
454 gdk_cursor_unref(guide_cursor);
455 ret = TRUE;
456 default:
457 // do nothing;
458 break;
459 }
460 break;
461 case GDK_KEY_RELEASE:
462 switch (get_group0_keyval (&event->key)) {
463 case GDK_Shift_L:
464 case GDK_Shift_R:
465 GdkCursor *guide_cursor;
466 guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
467 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
468 gdk_cursor_unref(guide_cursor);
469 break;
470 default:
471 // do nothing;
472 break;
473 }
474 default:
475 break;
476 }
478 return ret;
479 }
481 //static std::map<GdkInputSource, std::string> switchMap;
482 static std::map<std::string, int> toolToUse;
483 static std::string lastName;
484 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
486 static void init_extended()
487 {
488 std::string avoidName = "pad";
489 GList* devices = gdk_devices_list();
490 if ( devices ) {
491 for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
492 GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
493 if ( dev->name
494 && (avoidName != dev->name)
495 && (dev->source != GDK_SOURCE_MOUSE) ) {
496 // g_message("Adding '%s' as [%d]", dev->name, dev->source);
498 // Set the initial tool for the device
499 switch ( dev->source ) {
500 case GDK_SOURCE_PEN:
501 toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
502 break;
503 case GDK_SOURCE_ERASER:
504 toolToUse[dev->name] = TOOLS_ERASER;
505 break;
506 case GDK_SOURCE_CURSOR:
507 toolToUse[dev->name] = TOOLS_SELECT;
508 break;
509 default:
510 ; // do not add
511 }
512 // } else if (dev->name) {
513 // g_message("Skippn '%s' as [%s]", dev->name, dev->source);
514 }
515 }
516 }
517 }
520 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
521 {
522 GdkInputSource source = GDK_SOURCE_MOUSE;
523 std::string name;
525 switch ( event->type ) {
526 case GDK_MOTION_NOTIFY:
527 {
528 GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
529 if ( event2->device ) {
530 source = event2->device->source;
531 name = event2->device->name;
532 }
533 }
534 break;
536 case GDK_BUTTON_PRESS:
537 case GDK_2BUTTON_PRESS:
538 case GDK_3BUTTON_PRESS:
539 case GDK_BUTTON_RELEASE:
540 {
541 GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
542 if ( event2->device ) {
543 source = event2->device->source;
544 name = event2->device->name;
545 }
546 }
547 break;
549 case GDK_SCROLL:
550 {
551 GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
552 if ( event2->device ) {
553 source = event2->device->source;
554 name = event2->device->name;
555 }
556 }
557 break;
559 case GDK_PROXIMITY_IN:
560 case GDK_PROXIMITY_OUT:
561 {
562 GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
563 if ( event2->device ) {
564 source = event2->device->source;
565 name = event2->device->name;
566 }
567 }
568 break;
570 default:
571 ;
572 }
574 if (!name.empty()) {
575 if ( lastType != source || lastName != name ) {
576 // The device switched. See if it is one we 'count'
577 //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
578 std::map<std::string, int>::iterator it = toolToUse.find(lastName);
579 if (it != toolToUse.end()) {
580 // Save the tool currently selected for next time the input
581 // device shows up.
582 it->second = tools_active(desktop);
583 }
585 it = toolToUse.find(name);
586 if (it != toolToUse.end() ) {
587 tools_switch(desktop, it->second);
588 }
590 lastName = name;
591 lastType = source;
592 }
593 }
594 }
598 /*
599 Local Variables:
600 mode:c++
601 c-file-style:"stroustrup"
602 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
603 indent-tabs-mode:nil
604 fill-column:99
605 End:
606 */
607 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :