1/**************************************************************************/
2/* graph_edit.cpp */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#include "graph_edit.h"
32
33#include "core/input/input.h"
34#include "core/math/math_funcs.h"
35#include "core/os/keyboard.h"
36#include "scene/gui/box_container.h"
37#include "scene/gui/button.h"
38#include "scene/gui/graph_edit_arranger.h"
39#include "scene/gui/view_panner.h"
40#include "scene/resources/style_box_flat.h"
41#include "scene/theme/theme_db.h"
42
43constexpr int MINIMAP_OFFSET = 12;
44constexpr int MINIMAP_PADDING = 5;
45constexpr int MIN_DRAG_DISTANCE_FOR_VALID_CONNECTION = 20;
46constexpr int MAX_CONNECTION_LINE_CURVE_TESSELATION_STAGES = 5;
47constexpr int GRID_MINOR_STEPS_PER_MAJOR_LINE = 10;
48constexpr int GRID_MIN_SNAPPING_DISTANCE = 2;
49constexpr int GRID_MAX_SNAPPING_DISTANCE = 100;
50constexpr float CONNECTING_TARGET_LINE_COLOR_BRIGHTENING = 0.4;
51
52bool GraphEditFilter::has_point(const Point2 &p_point) const {
53 return ge->_filter_input(p_point);
54}
55
56GraphEditFilter::GraphEditFilter(GraphEdit *p_edit) {
57 ge = p_edit;
58}
59
60Control::CursorShape GraphEditMinimap::get_cursor_shape(const Point2 &p_pos) const {
61 if (is_resizing || (p_pos.x < theme_cache.resizer->get_width() && p_pos.y < theme_cache.resizer->get_height())) {
62 return CURSOR_FDIAGSIZE;
63 }
64
65 return Control::get_cursor_shape(p_pos);
66}
67
68void GraphEditMinimap::update_minimap() {
69 Vector2 graph_offset = _get_graph_offset();
70 Vector2 graph_size = _get_graph_size();
71
72 camera_position = ge->get_scroll_offset() - graph_offset;
73 camera_size = ge->get_size();
74
75 Vector2 render_size = _get_render_size();
76 float target_ratio = render_size.width / render_size.height;
77 float graph_ratio = graph_size.width / graph_size.height;
78
79 graph_proportions = graph_size;
80 graph_padding = Vector2(0, 0);
81 if (graph_ratio > target_ratio) {
82 graph_proportions.width = graph_size.width;
83 graph_proportions.height = graph_size.width / target_ratio;
84 graph_padding.y = Math::abs(graph_size.height - graph_proportions.y) / 2;
85 } else {
86 graph_proportions.width = graph_size.height * target_ratio;
87 graph_proportions.height = graph_size.height;
88 graph_padding.x = Math::abs(graph_size.width - graph_proportions.x) / 2;
89 }
90
91 // This centers minimap inside the minimap rectangle.
92 minimap_offset = minimap_padding + _convert_from_graph_position(graph_padding);
93}
94
95Rect2 GraphEditMinimap::get_camera_rect() {
96 Vector2 camera_center = _convert_from_graph_position(camera_position + camera_size / 2) + minimap_offset;
97 Vector2 camera_viewport = _convert_from_graph_position(camera_size);
98 Vector2 camera_pos = (camera_center - camera_viewport / 2);
99 return Rect2(camera_pos, camera_viewport);
100}
101
102Vector2 GraphEditMinimap::_get_render_size() {
103 if (!is_inside_tree()) {
104 return Vector2(0, 0);
105 }
106
107 return get_size() - 2 * minimap_padding;
108}
109
110Vector2 GraphEditMinimap::_get_graph_offset() {
111 return Vector2(ge->h_scrollbar->get_min(), ge->v_scrollbar->get_min());
112}
113
114Vector2 GraphEditMinimap::_get_graph_size() {
115 Vector2 graph_size = Vector2(ge->h_scrollbar->get_max(), ge->v_scrollbar->get_max()) - Vector2(ge->h_scrollbar->get_min(), ge->v_scrollbar->get_min());
116
117 if (graph_size.width == 0) {
118 graph_size.width = 1;
119 }
120 if (graph_size.height == 0) {
121 graph_size.height = 1;
122 }
123
124 return graph_size;
125}
126
127Vector2 GraphEditMinimap::_convert_from_graph_position(const Vector2 &p_position) {
128 Vector2 map_position = Vector2(0, 0);
129 Vector2 render_size = _get_render_size();
130
131 map_position.x = p_position.x * render_size.width / graph_proportions.x;
132 map_position.y = p_position.y * render_size.height / graph_proportions.y;
133
134 return map_position;
135}
136
137Vector2 GraphEditMinimap::_convert_to_graph_position(const Vector2 &p_position) {
138 Vector2 graph_position = Vector2(0, 0);
139 Vector2 render_size = _get_render_size();
140
141 graph_position.x = p_position.x * graph_proportions.x / render_size.width;
142 graph_position.y = p_position.y * graph_proportions.y / render_size.height;
143
144 return graph_position;
145}
146
147void GraphEditMinimap::gui_input(const Ref<InputEvent> &p_ev) {
148 ERR_FAIL_COND(p_ev.is_null());
149
150 if (!ge->is_minimap_enabled()) {
151 return;
152 }
153
154 Ref<InputEventMouseButton> mb = p_ev;
155 Ref<InputEventMouseMotion> mm = p_ev;
156
157 if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT) {
158 if (mb->is_pressed()) {
159 is_pressing = true;
160
161 Rect2 resizer_hitbox = Rect2(Point2(), theme_cache.resizer->get_size());
162 if (resizer_hitbox.has_point(mb->get_position())) {
163 is_resizing = true;
164 } else {
165 Vector2 click_position = _convert_to_graph_position(mb->get_position() - minimap_padding) - graph_padding;
166 _adjust_graph_scroll(click_position);
167 }
168 } else {
169 is_pressing = false;
170 is_resizing = false;
171 }
172 accept_event();
173 } else if (mm.is_valid() && is_pressing) {
174 if (is_resizing) {
175 // Prevent setting minimap wider than GraphEdit.
176 Vector2 new_minimap_size;
177 new_minimap_size.width = MIN(get_size().width - mm->get_relative().x, ge->get_size().width - 2.0 * minimap_padding.x);
178 new_minimap_size.height = MIN(get_size().height - mm->get_relative().y, ge->get_size().height - 2.0 * minimap_padding.y);
179 ge->set_minimap_size(new_minimap_size);
180
181 queue_redraw();
182 } else {
183 Vector2 click_position = _convert_to_graph_position(mm->get_position() - minimap_padding) - graph_padding;
184 _adjust_graph_scroll(click_position);
185 }
186 accept_event();
187 }
188}
189
190void GraphEditMinimap::_adjust_graph_scroll(const Vector2 &p_offset) {
191 Vector2 graph_offset = _get_graph_offset();
192 ge->set_scroll_offset(p_offset + graph_offset - camera_size / 2);
193}
194
195void GraphEditMinimap::_bind_methods() {
196 BIND_THEME_ITEM(Theme::DATA_TYPE_STYLEBOX, GraphEditMinimap, panel);
197 BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_STYLEBOX, GraphEditMinimap, node_style, "node");
198 BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_STYLEBOX, GraphEditMinimap, camera_style, "camera");
199 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEditMinimap, resizer);
200 BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, GraphEditMinimap, resizer_color);
201}
202
203GraphEditMinimap::GraphEditMinimap(GraphEdit *p_edit) {
204 ge = p_edit;
205
206 minimap_padding = Vector2(MINIMAP_PADDING, MINIMAP_PADDING);
207 minimap_offset = minimap_padding + _convert_from_graph_position(graph_padding);
208}
209
210Control::CursorShape GraphEdit::get_cursor_shape(const Point2 &p_pos) const {
211 if (moving_selection) {
212 return CURSOR_MOVE;
213 }
214
215 return Control::get_cursor_shape(p_pos);
216}
217
218PackedStringArray GraphEdit::get_configuration_warnings() const {
219 PackedStringArray warnings = Control::get_configuration_warnings();
220
221 warnings.push_back(RTR("Please be aware that GraphEdit and GraphNode will undergo extensive refactoring in a future 4.x version involving compatibility-breaking API changes."));
222
223 return warnings;
224}
225
226Error GraphEdit::connect_node(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
227 if (is_node_connected(p_from, p_from_port, p_to, p_to_port)) {
228 return OK;
229 }
230 Connection c;
231 c.from_node = p_from;
232 c.from_port = p_from_port;
233 c.to_node = p_to;
234 c.to_port = p_to_port;
235 c.activity = 0;
236 connections.push_back(c);
237 top_layer->queue_redraw();
238 minimap->queue_redraw();
239 queue_redraw();
240 connections_layer->queue_redraw();
241
242 return OK;
243}
244
245bool GraphEdit::is_node_connected(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
246 for (const Connection &E : connections) {
247 if (E.from_node == p_from && E.from_port == p_from_port && E.to_node == p_to && E.to_port == p_to_port) {
248 return true;
249 }
250 }
251
252 return false;
253}
254
255void GraphEdit::disconnect_node(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
256 for (const List<Connection>::Element *E = connections.front(); E; E = E->next()) {
257 if (E->get().from_node == p_from && E->get().from_port == p_from_port && E->get().to_node == p_to && E->get().to_port == p_to_port) {
258 connections.erase(E);
259 top_layer->queue_redraw();
260 minimap->queue_redraw();
261 queue_redraw();
262 connections_layer->queue_redraw();
263 return;
264 }
265 }
266}
267
268void GraphEdit::get_connection_list(List<Connection> *r_connections) const {
269 *r_connections = connections;
270}
271
272void GraphEdit::set_scroll_offset(const Vector2 &p_offset) {
273 setting_scroll_offset = true;
274 h_scrollbar->set_value(p_offset.x);
275 v_scrollbar->set_value(p_offset.y);
276 _update_scroll();
277 setting_scroll_offset = false;
278}
279
280Vector2 GraphEdit::get_scroll_offset() const {
281 return Vector2(h_scrollbar->get_value(), v_scrollbar->get_value());
282}
283
284void GraphEdit::_scroll_moved(double) {
285 if (!awaiting_scroll_offset_update) {
286 callable_mp(this, &GraphEdit::_update_scroll_offset).call_deferred();
287 awaiting_scroll_offset_update = true;
288 }
289 top_layer->queue_redraw();
290 minimap->queue_redraw();
291 queue_redraw();
292}
293
294void GraphEdit::_update_scroll_offset() {
295 set_block_minimum_size_adjust(true);
296
297 for (int i = 0; i < get_child_count(); i++) {
298 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
299 if (!graph_element) {
300 continue;
301 }
302
303 Point2 pos = graph_element->get_position_offset() * zoom;
304 pos -= Point2(h_scrollbar->get_value(), v_scrollbar->get_value());
305 graph_element->set_position(pos);
306 if (graph_element->get_scale() != Vector2(zoom, zoom)) {
307 graph_element->set_scale(Vector2(zoom, zoom));
308 }
309 }
310
311 connections_layer->set_position(-Point2(h_scrollbar->get_value(), v_scrollbar->get_value()));
312 set_block_minimum_size_adjust(false);
313 awaiting_scroll_offset_update = false;
314
315 // In Godot, signals on value change are avoided by convention.
316 if (!setting_scroll_offset) {
317 emit_signal(SNAME("scroll_offset_changed"), get_scroll_offset());
318 }
319}
320
321void GraphEdit::_update_scroll() {
322 if (updating) {
323 return;
324 }
325 updating = true;
326
327 set_block_minimum_size_adjust(true);
328
329 Rect2 screen_rect;
330 for (int i = 0; i < get_child_count(); i++) {
331 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
332 if (!graph_element) {
333 continue;
334 }
335
336 Rect2 node_rect;
337 node_rect.position = graph_element->get_position_offset() * zoom;
338 node_rect.size = graph_element->get_size() * zoom;
339 screen_rect = screen_rect.merge(node_rect);
340 }
341
342 screen_rect.position -= get_size();
343 screen_rect.size += get_size() * 2.0;
344
345 h_scrollbar->set_min(screen_rect.position.x);
346 h_scrollbar->set_max(screen_rect.position.x + screen_rect.size.width);
347 h_scrollbar->set_page(get_size().x);
348 if (h_scrollbar->get_max() - h_scrollbar->get_min() <= h_scrollbar->get_page()) {
349 h_scrollbar->hide();
350 } else {
351 h_scrollbar->show();
352 }
353
354 v_scrollbar->set_min(screen_rect.position.y);
355 v_scrollbar->set_max(screen_rect.position.y + screen_rect.size.height);
356 v_scrollbar->set_page(get_size().height);
357
358 if (v_scrollbar->get_max() - v_scrollbar->get_min() <= v_scrollbar->get_page()) {
359 v_scrollbar->hide();
360 } else {
361 v_scrollbar->show();
362 }
363
364 Size2 hmin = h_scrollbar->get_combined_minimum_size();
365 Size2 vmin = v_scrollbar->get_combined_minimum_size();
366
367 // Avoid scrollbar overlapping.
368 h_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, v_scrollbar->is_visible() ? -vmin.width : 0);
369 v_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, h_scrollbar->is_visible() ? -hmin.height : 0);
370
371 set_block_minimum_size_adjust(false);
372
373 if (!awaiting_scroll_offset_update) {
374 callable_mp(this, &GraphEdit::_update_scroll_offset).call_deferred();
375 awaiting_scroll_offset_update = true;
376 }
377
378 updating = false;
379}
380
381void GraphEdit::_graph_element_moved_to_front(Node *p_node) {
382 GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
383 ERR_FAIL_NULL(graph_element);
384
385 graph_element->move_to_front();
386}
387
388void GraphEdit::_graph_element_selected(Node *p_node) {
389 GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
390 ERR_FAIL_NULL(graph_element);
391
392 emit_signal(SNAME("node_selected"), graph_element);
393}
394
395void GraphEdit::_graph_element_deselected(Node *p_node) {
396 GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
397 ERR_FAIL_NULL(graph_element);
398
399 emit_signal(SNAME("node_deselected"), graph_element);
400}
401
402void GraphEdit::_graph_element_resized(Vector2 p_new_minsize, Node *p_node) {
403 GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
404 ERR_FAIL_NULL(graph_element);
405
406 graph_element->set_size(p_new_minsize);
407}
408
409void GraphEdit::_graph_element_moved(Node *p_node) {
410 GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
411 ERR_FAIL_NULL(graph_element);
412
413 top_layer->queue_redraw();
414 minimap->queue_redraw();
415 queue_redraw();
416 connections_layer->queue_redraw();
417}
418
419void GraphEdit::_graph_node_slot_updated(int p_index, Node *p_node) {
420 GraphNode *graph_node = Object::cast_to<GraphNode>(p_node);
421 ERR_FAIL_NULL(graph_node);
422
423 top_layer->queue_redraw();
424 minimap->queue_redraw();
425 queue_redraw();
426 connections_layer->queue_redraw();
427}
428
429void GraphEdit::add_child_notify(Node *p_child) {
430 Control::add_child_notify(p_child);
431
432 // Keep the top layer always on top!
433 callable_mp((CanvasItem *)top_layer, &CanvasItem::move_to_front).call_deferred();
434
435 GraphElement *graph_element = Object::cast_to<GraphElement>(p_child);
436 if (graph_element) {
437 graph_element->connect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_element_moved).bind(graph_element));
438 graph_element->connect("node_selected", callable_mp(this, &GraphEdit::_graph_element_selected).bind(graph_element));
439 graph_element->connect("node_deselected", callable_mp(this, &GraphEdit::_graph_element_deselected).bind(graph_element));
440
441 GraphNode *graph_node = Object::cast_to<GraphNode>(graph_element);
442 if (graph_node) {
443 graph_element->connect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated).bind(graph_element));
444 }
445
446 graph_element->connect("raise_request", callable_mp(this, &GraphEdit::_graph_element_moved_to_front).bind(graph_element));
447 graph_element->connect("resize_request", callable_mp(this, &GraphEdit::_graph_element_resized).bind(graph_element));
448 graph_element->connect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::queue_redraw));
449 graph_element->connect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::queue_redraw));
450
451 graph_element->set_scale(Vector2(zoom, zoom));
452 _graph_element_moved(graph_element);
453 graph_element->set_mouse_filter(MOUSE_FILTER_PASS);
454 }
455}
456
457void GraphEdit::remove_child_notify(Node *p_child) {
458 Control::remove_child_notify(p_child);
459
460 if (p_child == top_layer) {
461 top_layer = nullptr;
462 minimap = nullptr;
463 } else if (p_child == connections_layer) {
464 connections_layer = nullptr;
465 }
466
467 if (top_layer != nullptr && is_inside_tree()) {
468 // Keep the top layer always on top!
469 callable_mp((CanvasItem *)top_layer, &CanvasItem::move_to_front).call_deferred();
470 }
471
472 GraphElement *graph_element = Object::cast_to<GraphElement>(p_child);
473 if (graph_element) {
474 graph_element->disconnect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_element_moved));
475 graph_element->disconnect("node_selected", callable_mp(this, &GraphEdit::_graph_element_selected));
476 graph_element->disconnect("node_deselected", callable_mp(this, &GraphEdit::_graph_element_deselected));
477
478 GraphNode *graph_node = Object::cast_to<GraphNode>(graph_element);
479 if (graph_node) {
480 graph_element->disconnect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated));
481 }
482
483 graph_element->disconnect("raise_request", callable_mp(this, &GraphEdit::_graph_element_moved_to_front));
484 graph_element->disconnect("resize_request", callable_mp(this, &GraphEdit::_graph_element_resized));
485
486 // In case of the whole GraphEdit being destroyed these references can already be freed.
487 if (connections_layer != nullptr && connections_layer->is_inside_tree()) {
488 graph_element->disconnect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::queue_redraw));
489 }
490 if (minimap != nullptr && minimap->is_inside_tree()) {
491 graph_element->disconnect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::queue_redraw));
492 }
493 }
494}
495
496void GraphEdit::_update_theme_item_cache() {
497 Control::_update_theme_item_cache();
498
499 theme_cache.base_scale = get_theme_default_base_scale();
500}
501
502void GraphEdit::_notification(int p_what) {
503 switch (p_what) {
504 case NOTIFICATION_THEME_CHANGED: {
505 zoom_minus_button->set_icon(theme_cache.zoom_out);
506 zoom_reset_button->set_icon(theme_cache.zoom_reset);
507 zoom_plus_button->set_icon(theme_cache.zoom_in);
508
509 toggle_snapping_button->set_icon(theme_cache.snapping_toggle);
510 show_grid_button->set_icon(theme_cache.grid_toggle);
511 minimap_button->set_icon(theme_cache.minimap_toggle);
512 layout_button->set_icon(theme_cache.layout);
513
514 zoom_label->set_custom_minimum_size(Size2(48, 0) * theme_cache.base_scale);
515 } break;
516
517 case NOTIFICATION_READY: {
518 Size2 hmin = h_scrollbar->get_combined_minimum_size();
519 Size2 vmin = v_scrollbar->get_combined_minimum_size();
520
521 h_scrollbar->set_anchor_and_offset(SIDE_LEFT, ANCHOR_BEGIN, 0);
522 h_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
523 h_scrollbar->set_anchor_and_offset(SIDE_TOP, ANCHOR_END, -hmin.height);
524 h_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
525
526 v_scrollbar->set_anchor_and_offset(SIDE_LEFT, ANCHOR_END, -vmin.width);
527 v_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
528 v_scrollbar->set_anchor_and_offset(SIDE_TOP, ANCHOR_BEGIN, 0);
529 v_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
530 } break;
531
532 case NOTIFICATION_DRAW: {
533 // Draw background fill.
534 draw_style_box(theme_cache.panel, Rect2(Point2(), get_size()));
535
536 // Draw background grid.
537 if (show_grid) {
538 Vector2 offset = get_scroll_offset() / zoom;
539 Size2 size = get_size() / zoom;
540
541 Point2i from_pos = (offset / float(snapping_distance)).floor();
542 Point2i len = (size / float(snapping_distance)).floor() + Vector2(1, 1);
543
544 for (int i = from_pos.x; i < from_pos.x + len.x; i++) {
545 Color color;
546
547 if (ABS(i) % GRID_MINOR_STEPS_PER_MAJOR_LINE == 0) {
548 color = theme_cache.grid_major;
549 } else {
550 color = theme_cache.grid_minor;
551 }
552
553 float base_offset = i * snapping_distance * zoom - offset.x * zoom;
554 draw_line(Vector2(base_offset, 0), Vector2(base_offset, get_size().height), color);
555 }
556
557 for (int i = from_pos.y; i < from_pos.y + len.y; i++) {
558 Color color;
559
560 if (ABS(i) % GRID_MINOR_STEPS_PER_MAJOR_LINE == 0) {
561 color = theme_cache.grid_major;
562 } else {
563 color = theme_cache.grid_minor;
564 }
565
566 float base_offset = i * snapping_distance * zoom - offset.y * zoom;
567 draw_line(Vector2(0, base_offset), Vector2(get_size().width, base_offset), color);
568 }
569 }
570 } break;
571
572 case NOTIFICATION_RESIZED: {
573 _update_scroll();
574 top_layer->queue_redraw();
575 minimap->queue_redraw();
576 } break;
577 }
578}
579
580bool GraphEdit::_filter_input(const Point2 &p_point) {
581 for (int i = get_child_count() - 1; i >= 0; i--) {
582 GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
583 if (!graph_node || !graph_node->is_visible_in_tree()) {
584 continue;
585 }
586
587 Ref<Texture2D> port_icon = graph_node->theme_cache.port;
588
589 for (int j = 0; j < graph_node->get_input_port_count(); j++) {
590 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
591
592 // Determine slot height.
593 int slot_index = graph_node->get_input_port_slot(j);
594 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
595
596 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
597
598 if (is_in_input_hotzone(graph_node, j, p_point / zoom, port_size)) {
599 return true;
600 }
601 }
602
603 for (int j = 0; j < graph_node->get_output_port_count(); j++) {
604 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
605
606 // Determine slot height.
607 int slot_index = graph_node->get_output_port_slot(j);
608 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
609 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
610
611 if (is_in_output_hotzone(graph_node, j, p_point / zoom, port_size)) {
612 return true;
613 }
614 }
615 }
616
617 return false;
618}
619
620void GraphEdit::_top_layer_input(const Ref<InputEvent> &p_ev) {
621 Ref<InputEventMouseButton> mb = p_ev;
622 if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_pressed()) {
623 connecting_valid = false;
624 click_pos = mb->get_position() / zoom;
625 for (int i = get_child_count() - 1; i >= 0; i--) {
626 GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
627 if (!graph_node || !graph_node->is_visible_in_tree()) {
628 continue;
629 }
630
631 Ref<Texture2D> port_icon = graph_node->theme_cache.port;
632
633 for (int j = 0; j < graph_node->get_output_port_count(); j++) {
634 Vector2 pos = graph_node->get_output_port_position(j) * zoom + graph_node->get_position();
635 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
636
637 // Determine slot height.
638 int slot_index = graph_node->get_output_port_slot(j);
639 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
640 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
641
642 if (is_in_output_hotzone(graph_node, j, click_pos, port_size)) {
643 if (valid_left_disconnect_types.has(graph_node->get_output_port_type(j))) {
644 // Check disconnect.
645 for (const Connection &E : connections) {
646 if (E.from_node == graph_node->get_name() && E.from_port == j) {
647 Node *to = get_node(NodePath(E.to_node));
648 if (Object::cast_to<GraphNode>(to)) {
649 connecting_from = E.to_node;
650 connecting_index = E.to_port;
651 connecting_out = false;
652 connecting_type = Object::cast_to<GraphNode>(to)->get_input_port_type(E.to_port);
653 connecting_color = Object::cast_to<GraphNode>(to)->get_input_port_color(E.to_port);
654 connecting_target = false;
655 connecting_to = pos;
656
657 if (connecting_type >= 0) {
658 just_disconnected = true;
659
660 emit_signal(SNAME("disconnection_request"), E.from_node, E.from_port, E.to_node, E.to_port);
661 to = get_node(NodePath(connecting_from)); // Maybe it was erased.
662 if (Object::cast_to<GraphNode>(to)) {
663 connecting = true;
664 emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, false);
665 }
666 }
667 return;
668 }
669 }
670 }
671 }
672
673 connecting_from = graph_node->get_name();
674 connecting_index = j;
675 connecting_out = true;
676 connecting_type = graph_node->get_output_port_type(j);
677 connecting_color = graph_node->get_output_port_color(j);
678 connecting_target = false;
679 connecting_to = pos;
680 if (connecting_type >= 0) {
681 connecting = true;
682 just_disconnected = false;
683 emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, true);
684 }
685 return;
686 }
687 }
688
689 for (int j = 0; j < graph_node->get_input_port_count(); j++) {
690 Vector2 pos = graph_node->get_input_port_position(j) * zoom + graph_node->get_position();
691
692 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
693
694 // Determine slot height.
695 int slot_index = graph_node->get_input_port_slot(j);
696 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
697 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
698
699 if (is_in_input_hotzone(graph_node, j, click_pos, port_size)) {
700 if (right_disconnects || valid_right_disconnect_types.has(graph_node->get_input_port_type(j))) {
701 // Check disconnect.
702 for (const Connection &E : connections) {
703 if (E.to_node == graph_node->get_name() && E.to_port == j) {
704 Node *fr = get_node(NodePath(E.from_node));
705 if (Object::cast_to<GraphNode>(fr)) {
706 connecting_from = E.from_node;
707 connecting_index = E.from_port;
708 connecting_out = true;
709 connecting_type = Object::cast_to<GraphNode>(fr)->get_output_port_type(E.from_port);
710 connecting_color = Object::cast_to<GraphNode>(fr)->get_output_port_color(E.from_port);
711 connecting_target = false;
712 connecting_to = pos;
713 just_disconnected = true;
714
715 if (connecting_type >= 0) {
716 emit_signal(SNAME("disconnection_request"), E.from_node, E.from_port, E.to_node, E.to_port);
717 fr = get_node(NodePath(connecting_from));
718 if (Object::cast_to<GraphNode>(fr)) {
719 connecting = true;
720 emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, true);
721 }
722 }
723 return;
724 }
725 }
726 }
727 }
728
729 connecting_from = graph_node->get_name();
730 connecting_index = j;
731 connecting_out = false;
732 connecting_type = graph_node->get_input_port_type(j);
733 connecting_color = graph_node->get_input_port_color(j);
734 connecting_target = false;
735 connecting_to = pos;
736 if (connecting_type >= 0) {
737 connecting = true;
738 just_disconnected = false;
739 emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, false);
740 }
741 return;
742 }
743 }
744 }
745 }
746
747 Ref<InputEventMouseMotion> mm = p_ev;
748 if (mm.is_valid() && connecting) {
749 connecting_to = mm->get_position();
750 connecting_target = false;
751 top_layer->queue_redraw();
752 minimap->queue_redraw();
753
754 connecting_valid = just_disconnected || click_pos.distance_to(connecting_to / zoom) > MIN_DRAG_DISTANCE_FOR_VALID_CONNECTION;
755
756 if (connecting_valid) {
757 Vector2 mpos = mm->get_position() / zoom;
758 for (int i = get_child_count() - 1; i >= 0; i--) {
759 GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
760 if (!graph_node || !graph_node->is_visible_in_tree()) {
761 continue;
762 }
763
764 Ref<Texture2D> port_icon = graph_node->theme_cache.port;
765
766 if (!connecting_out) {
767 for (int j = 0; j < graph_node->get_output_port_count(); j++) {
768 Vector2 pos = graph_node->get_output_port_position(j) * zoom + graph_node->get_position();
769 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
770
771 // Determine slot height.
772 int slot_index = graph_node->get_output_port_slot(j);
773 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
774 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
775
776 int type = graph_node->get_output_port_type(j);
777 if ((type == connecting_type ||
778 valid_connection_types.has(ConnectionType(type, connecting_type))) &&
779 is_in_output_hotzone(graph_node, j, mpos, port_size)) {
780 if (!is_node_hover_valid(graph_node->get_name(), j, connecting_from, connecting_index)) {
781 continue;
782 }
783 connecting_target = true;
784 connecting_to = pos;
785 connecting_target_to = graph_node->get_name();
786 connecting_target_index = j;
787 return;
788 }
789 }
790 } else {
791 for (int j = 0; j < graph_node->get_input_port_count(); j++) {
792 Vector2 pos = graph_node->get_input_port_position(j) * zoom + graph_node->get_position();
793 Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
794
795 // Determine slot height.
796 int slot_index = graph_node->get_input_port_slot(j);
797 Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
798 port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
799
800 int type = graph_node->get_input_port_type(j);
801 if ((type == connecting_type || valid_connection_types.has(ConnectionType(connecting_type, type))) &&
802 is_in_input_hotzone(graph_node, j, mpos, port_size)) {
803 if (!is_node_hover_valid(connecting_from, connecting_index, graph_node->get_name(), j)) {
804 continue;
805 }
806 connecting_target = true;
807 connecting_to = pos;
808 connecting_target_to = graph_node->get_name();
809 connecting_target_index = j;
810 return;
811 }
812 }
813 }
814 }
815 }
816 }
817
818 if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
819 if (connecting_valid) {
820 if (connecting && connecting_target) {
821 if (connecting_out) {
822 emit_signal(SNAME("connection_request"), connecting_from, connecting_index, connecting_target_to, connecting_target_index);
823 } else {
824 emit_signal(SNAME("connection_request"), connecting_target_to, connecting_target_index, connecting_from, connecting_index);
825 }
826 } else if (!just_disconnected) {
827 if (connecting_out) {
828 emit_signal(SNAME("connection_to_empty"), connecting_from, connecting_index, mb->get_position());
829 } else {
830 emit_signal(SNAME("connection_from_empty"), connecting_from, connecting_index, mb->get_position());
831 }
832 }
833 }
834
835 if (connecting) {
836 force_connection_drag_end();
837 }
838 }
839}
840
841bool GraphEdit::_check_clickable_control(Control *p_control, const Vector2 &mpos, const Vector2 &p_offset) {
842 if (p_control->is_set_as_top_level() || !p_control->is_visible() || !p_control->is_inside_tree()) {
843 return false;
844 }
845
846 Rect2 control_rect = p_control->get_rect();
847 control_rect.position *= zoom;
848 control_rect.size *= zoom;
849 control_rect.position += p_offset;
850
851 if (!control_rect.has_point(mpos) || p_control->get_mouse_filter() == MOUSE_FILTER_IGNORE) {
852 // Test children.
853 for (int i = 0; i < p_control->get_child_count(); i++) {
854 Control *child_rect = Object::cast_to<Control>(p_control->get_child(i));
855 if (!child_rect) {
856 continue;
857 }
858 if (_check_clickable_control(child_rect, mpos, control_rect.position)) {
859 return true;
860 }
861 }
862
863 return false;
864 } else {
865 return true;
866 }
867}
868
869bool GraphEdit::is_in_input_hotzone(GraphNode *p_graph_node, int p_port_idx, const Vector2 &p_mouse_pos, const Vector2i &p_port_size) {
870 bool success;
871 if (GDVIRTUAL_CALL(_is_in_input_hotzone, p_graph_node, p_port_idx, p_mouse_pos, success)) {
872 return success;
873 } else {
874 Vector2 pos = p_graph_node->get_input_port_position(p_port_idx) * zoom + p_graph_node->get_position();
875 return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, true);
876 }
877}
878
879bool GraphEdit::is_in_output_hotzone(GraphNode *p_graph_node, int p_port_idx, const Vector2 &p_mouse_pos, const Vector2i &p_port_size) {
880 if (p_graph_node->is_resizable()) {
881 Ref<Texture2D> resizer = p_graph_node->theme_cache.resizer;
882 Rect2 resizer_rect = Rect2(p_graph_node->get_position() / zoom + p_graph_node->get_size() - resizer->get_size(), resizer->get_size());
883 if (resizer_rect.has_point(p_mouse_pos)) {
884 return false;
885 }
886 }
887
888 bool success;
889 if (GDVIRTUAL_CALL(_is_in_output_hotzone, p_graph_node, p_port_idx, p_mouse_pos, success)) {
890 return success;
891 } else {
892 Vector2 pos = p_graph_node->get_output_port_position(p_port_idx) * zoom + p_graph_node->get_position();
893 return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, false);
894 }
895}
896
897bool GraphEdit::is_in_port_hotzone(const Vector2 &p_pos, const Vector2 &p_mouse_pos, const Vector2i &p_port_size, bool p_left) {
898 Rect2 hotzone = Rect2(
899 p_pos.x - (p_left ? theme_cache.port_hotzone_outer_extent : theme_cache.port_hotzone_inner_extent),
900 p_pos.y - p_port_size.height / 2.0,
901 theme_cache.port_hotzone_inner_extent + theme_cache.port_hotzone_outer_extent,
902 p_port_size.height);
903
904 if (!hotzone.has_point(p_mouse_pos)) {
905 return false;
906 }
907
908 for (int i = 0; i < get_child_count(); i++) {
909 GraphNode *child = Object::cast_to<GraphNode>(get_child(i));
910 if (!child) {
911 continue;
912 }
913
914 Rect2 child_rect = child->get_rect();
915 if (child_rect.has_point(p_mouse_pos * zoom)) {
916 for (int j = 0; j < child->get_child_count(); j++) {
917 Control *subchild = Object::cast_to<Control>(child->get_child(j));
918 if (!subchild) {
919 continue;
920 }
921
922 if (_check_clickable_control(subchild, p_mouse_pos * zoom, child_rect.position)) {
923 return false;
924 }
925 }
926 }
927 }
928
929 return true;
930}
931
932PackedVector2Array GraphEdit::get_connection_line(const Vector2 &p_from, const Vector2 &p_to) {
933 Vector<Vector2> ret;
934 if (GDVIRTUAL_CALL(_get_connection_line, p_from, p_to, ret)) {
935 return ret;
936 }
937
938 float x_diff = (p_to.x - p_from.x);
939 float cp_offset = x_diff * lines_curvature;
940 if (x_diff < 0) {
941 cp_offset *= -1;
942 }
943
944 Curve2D curve;
945 curve.add_point(p_from);
946 curve.set_point_out(0, Vector2(cp_offset, 0));
947 curve.add_point(p_to);
948 curve.set_point_in(1, Vector2(-cp_offset, 0));
949
950 if (lines_curvature > 0) {
951 return curve.tessellate(MAX_CONNECTION_LINE_CURVE_TESSELATION_STAGES, 2.0);
952 } else {
953 return curve.tessellate(1);
954 }
955}
956
957void GraphEdit::_draw_connection_line(CanvasItem *p_where, const Vector2 &p_from, const Vector2 &p_to, const Color &p_color, const Color &p_to_color, float p_width, float p_zoom) {
958 Vector<Vector2> points = get_connection_line(p_from / p_zoom, p_to / p_zoom);
959 Vector<Vector2> scaled_points;
960 Vector<Color> colors;
961 float length = (p_from / p_zoom).distance_to(p_to / p_zoom);
962 for (int i = 0; i < points.size(); i++) {
963 float d = (p_from / p_zoom).distance_to(points[i]) / length;
964 colors.push_back(p_color.lerp(p_to_color, d));
965 scaled_points.push_back(points[i] * p_zoom);
966 }
967
968 // Thickness below 0.5 doesn't look good on the graph or its minimap.
969 p_where->draw_polyline_colors(scaled_points, colors, MAX(0.5, Math::floor(p_width * theme_cache.base_scale)), lines_antialiased);
970}
971
972void GraphEdit::_connections_layer_draw() {
973 // Draw connections.
974 List<List<Connection>::Element *> to_erase;
975 for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
976 const Connection &c = E->get();
977
978 Node *from = get_node(NodePath(c.from_node));
979 GraphNode *gnode_from = Object::cast_to<GraphNode>(from);
980
981 if (!gnode_from) {
982 to_erase.push_back(E);
983 continue;
984 }
985
986 Node *to = get_node(NodePath(c.to_node));
987 GraphNode *gnode_to = Object::cast_to<GraphNode>(to);
988
989 if (!gnode_to) {
990 to_erase.push_back(E);
991 continue;
992 }
993
994 Vector2 frompos = gnode_from->get_output_port_position(c.from_port) * zoom + gnode_from->get_position_offset() * zoom;
995 Color color = gnode_from->get_output_port_color(c.from_port);
996 Vector2 topos = gnode_to->get_input_port_position(c.to_port) * zoom + gnode_to->get_position_offset() * zoom;
997 Color tocolor = gnode_to->get_input_port_color(c.to_port);
998
999 if (c.activity > 0) {
1000 color = color.lerp(theme_cache.activity_color, c.activity);
1001 tocolor = tocolor.lerp(theme_cache.activity_color, c.activity);
1002 }
1003 _draw_connection_line(connections_layer, frompos, topos, color, tocolor, lines_thickness, zoom);
1004 }
1005
1006 for (List<Connection>::Element *&E : to_erase) {
1007 connections.erase(E);
1008 }
1009}
1010
1011void GraphEdit::_top_layer_draw() {
1012 _update_scroll();
1013
1014 if (connecting) {
1015 Node *node_from = get_node_or_null(NodePath(connecting_from));
1016 ERR_FAIL_NULL(node_from);
1017 GraphNode *graph_node_from = Object::cast_to<GraphNode>(node_from);
1018 ERR_FAIL_NULL(graph_node_from);
1019 Vector2 pos;
1020 if (connecting_out) {
1021 pos = graph_node_from->get_output_port_position(connecting_index) * zoom;
1022 } else {
1023 pos = graph_node_from->get_input_port_position(connecting_index) * zoom;
1024 }
1025 pos += graph_node_from->get_position();
1026
1027 Vector2 to_pos = connecting_to;
1028 Color line_color = connecting_color;
1029
1030 // Draw the line to the mouse cursor brighter when it's over a valid target port.
1031 if (connecting_target) {
1032 line_color.r += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
1033 line_color.g += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
1034 line_color.b += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
1035 }
1036
1037 if (!connecting_out) {
1038 SWAP(pos, to_pos);
1039 }
1040 _draw_connection_line(top_layer, pos, to_pos, line_color, line_color, lines_thickness, zoom);
1041 }
1042
1043 if (box_selecting) {
1044 top_layer->draw_rect(box_selecting_rect, theme_cache.selection_fill);
1045 top_layer->draw_rect(box_selecting_rect, theme_cache.selection_stroke, false);
1046 }
1047}
1048
1049void GraphEdit::_minimap_draw() {
1050 if (!is_minimap_enabled()) {
1051 return;
1052 }
1053
1054 minimap->update_minimap();
1055
1056 // Draw the minimap background.
1057 Rect2 minimap_rect = Rect2(Point2(), minimap->get_size());
1058 minimap->draw_style_box(minimap->theme_cache.panel, minimap_rect);
1059
1060 Vector2 graph_offset = minimap->_get_graph_offset();
1061 Vector2 minimap_offset = minimap->minimap_offset;
1062
1063 // Draw graph nodes.
1064 for (int i = get_child_count() - 1; i >= 0; i--) {
1065 GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
1066 if (!graph_node || !graph_node->is_visible()) {
1067 continue;
1068 }
1069
1070 Vector2 node_position = minimap->_convert_from_graph_position(graph_node->get_position_offset() * zoom - graph_offset) + minimap_offset;
1071 Vector2 node_size = minimap->_convert_from_graph_position(graph_node->get_size() * zoom);
1072 Rect2 node_rect = Rect2(node_position, node_size);
1073
1074 Ref<StyleBoxFlat> sb_minimap = minimap->theme_cache.node_style->duplicate();
1075
1076 // Override default values with colors provided by the GraphNode's stylebox, if possible.
1077 Ref<StyleBoxFlat> sb_frame = graph_node->is_selected() ? graph_node->theme_cache.panel_selected : graph_node->theme_cache.panel;
1078 if (sb_frame.is_valid()) {
1079 Color node_color = sb_frame->get_bg_color();
1080 sb_minimap->set_bg_color(node_color);
1081 }
1082
1083 minimap->draw_style_box(sb_minimap, node_rect);
1084 }
1085
1086 // Draw node connections.
1087 for (const Connection &E : connections) {
1088 Node *from = get_node(NodePath(E.from_node));
1089 GraphNode *graph_node_from = Object::cast_to<GraphNode>(from);
1090 if (!graph_node_from) {
1091 continue;
1092 }
1093
1094 Node *node_to = get_node(NodePath(E.to_node));
1095 GraphNode *graph_node_to = Object::cast_to<GraphNode>(node_to);
1096 if (!graph_node_to) {
1097 continue;
1098 }
1099
1100 Vector2 from_port_position = graph_node_from->get_position_offset() * zoom + graph_node_from->get_output_port_position(E.from_port) * zoom;
1101 Vector2 from_position = minimap->_convert_from_graph_position(from_port_position - graph_offset) + minimap_offset;
1102 Color from_color = graph_node_from->get_output_port_color(E.from_port);
1103 Vector2 to_port_position = graph_node_to->get_position_offset() * zoom + graph_node_to->get_input_port_position(E.to_port) * zoom;
1104 Vector2 to_position = minimap->_convert_from_graph_position(to_port_position - graph_offset) + minimap_offset;
1105 Color to_color = graph_node_to->get_input_port_color(E.to_port);
1106
1107 if (E.activity > 0) {
1108 from_color = from_color.lerp(theme_cache.activity_color, E.activity);
1109 to_color = to_color.lerp(theme_cache.activity_color, E.activity);
1110 }
1111 _draw_connection_line(minimap, from_position, to_position, from_color, to_color, 0.5, minimap->_convert_from_graph_position(Vector2(zoom, zoom)).length());
1112 }
1113
1114 // Draw the "camera" viewport.
1115 Rect2 camera_rect = minimap->get_camera_rect();
1116 minimap->draw_style_box(minimap->theme_cache.camera_style, camera_rect);
1117
1118 // Draw the resizer control.
1119 Ref<Texture2D> resizer = minimap->theme_cache.resizer;
1120 Color resizer_color = minimap->theme_cache.resizer_color;
1121 minimap->draw_texture(resizer, Point2(), resizer_color);
1122}
1123
1124void GraphEdit::set_selected(Node *p_child) {
1125 for (int i = get_child_count() - 1; i >= 0; i--) {
1126 GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
1127 if (!graph_node) {
1128 continue;
1129 }
1130
1131 graph_node->set_selected(graph_node == p_child);
1132 }
1133}
1134
1135void GraphEdit::gui_input(const Ref<InputEvent> &p_ev) {
1136 ERR_FAIL_COND(p_ev.is_null());
1137 if (panner->gui_input(p_ev, warped_panning ? get_global_rect() : Rect2())) {
1138 return;
1139 }
1140
1141 Ref<InputEventMouseMotion> mm = p_ev;
1142
1143 if (mm.is_valid() && dragging) {
1144 if (!moving_selection) {
1145 emit_signal(SNAME("begin_node_move"));
1146 moving_selection = true;
1147 }
1148
1149 just_selected = true;
1150 drag_accum += mm->get_relative();
1151 for (int i = get_child_count() - 1; i >= 0; i--) {
1152 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
1153 if (graph_element && graph_element->is_selected() && graph_element->is_draggable()) {
1154 Vector2 pos = (graph_element->get_drag_from() * zoom + drag_accum) / zoom;
1155
1156 // Snapping can be toggled temporarily by holding down Ctrl.
1157 // This is done here as to not toggle the grid when holding down Ctrl.
1158 if (snapping_enabled ^ Input::get_singleton()->is_key_pressed(Key::CTRL)) {
1159 pos = pos.snapped(Vector2(snapping_distance, snapping_distance));
1160 }
1161
1162 graph_element->set_position_offset(pos);
1163 }
1164 }
1165 }
1166
1167 if (mm.is_valid() && box_selecting) {
1168 box_selecting_to = mm->get_position();
1169
1170 box_selecting_rect = Rect2(box_selecting_from.min(box_selecting_to), (box_selecting_from - box_selecting_to).abs());
1171
1172 for (int i = get_child_count() - 1; i >= 0; i--) {
1173 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
1174 if (!graph_element) {
1175 continue;
1176 }
1177
1178 Rect2 r = graph_element->get_rect();
1179 bool in_box = r.intersects(box_selecting_rect);
1180
1181 if (in_box) {
1182 graph_element->set_selected(box_selection_mode_additive);
1183 } else {
1184 graph_element->set_selected(prev_selected.find(graph_element) != nullptr);
1185 }
1186 }
1187
1188 top_layer->queue_redraw();
1189 minimap->queue_redraw();
1190 }
1191
1192 Ref<InputEventMouseButton> mb = p_ev;
1193 if (mb.is_valid()) {
1194 if (mb->get_button_index() == MouseButton::RIGHT && mb->is_pressed()) {
1195 if (box_selecting) {
1196 box_selecting = false;
1197 for (int i = get_child_count() - 1; i >= 0; i--) {
1198 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
1199 if (!graph_element) {
1200 continue;
1201 }
1202
1203 graph_element->set_selected(prev_selected.find(graph_element) != nullptr);
1204 }
1205 top_layer->queue_redraw();
1206 minimap->queue_redraw();
1207 } else {
1208 if (connecting) {
1209 force_connection_drag_end();
1210 } else {
1211 emit_signal(SNAME("popup_request"), mb->get_position());
1212 }
1213 }
1214 }
1215
1216 if (mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed() && dragging) {
1217 if (!just_selected && drag_accum == Vector2() && Input::get_singleton()->is_key_pressed(Key::CTRL)) {
1218 // Deselect current node.
1219 for (int i = get_child_count() - 1; i >= 0; i--) {
1220 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
1221
1222 if (graph_element) {
1223 Rect2 r = graph_element->get_rect();
1224 if (r.has_point(mb->get_position())) {
1225 graph_element->set_selected(false);
1226 }
1227 }
1228 }
1229 }
1230
1231 if (drag_accum != Vector2()) {
1232 for (int i = get_child_count() - 1; i >= 0; i--) {
1233 GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
1234 if (graph_element && graph_element->is_selected()) {
1235 graph_element->set_drag(false);
1236 }
1237 }
1238 }
1239
1240 if (moving_selection) {
1241 emit_signal(SNAME("end_node_move"));
1242 moving_selection = false;
1243 }
1244
1245 dragging = false;
1246
1247 top_layer->queue_redraw();
1248 minimap->queue_redraw();
1249 queue_redraw();
1250 connections_layer->queue_redraw();
1251 }
1252
1253 // Node selection logic.
1254 if (mb->get_button_index() == MouseButton::LEFT && mb->is_pressed()) {
1255 GraphElement *graph_element = nullptr;
1256
1257 // Find node which was clicked on.
1258 for (int i = get_child_count() - 1; i >= 0; i--) {
1259 GraphElement *selected_element = Object::cast_to<GraphElement>(get_child(i));
1260
1261 if (!selected_element) {
1262 continue;
1263 }
1264
1265 if (selected_element->is_resizing()) {
1266 continue;
1267 }
1268
1269 if (selected_element->has_point((mb->get_position() - selected_element->get_position()) / zoom)) {
1270 graph_element = selected_element;
1271 break;
1272 }
1273 }
1274
1275 if (graph_element) {
1276 if (_filter_input(mb->get_position())) {
1277 return;
1278 }
1279
1280 // Left-clicked on a node, select it.
1281 dragging = true;
1282 drag_accum = Vector2();
1283 just_selected = !graph_element->is_selected();
1284 if (!graph_element->is_selected() && !Input::get_singleton()->is_key_pressed(Key::CTRL)) {
1285 for (int i = 0; i < get_child_count(); i++) {
1286 GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
1287 if (!child_element) {
1288 continue;
1289 }
1290
1291 child_element->set_selected(child_element == graph_element);
1292 }
1293 }
1294
1295 graph_element->set_selected(true);
1296 for (int i = 0; i < get_child_count(); i++) {
1297 GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
1298 if (!child_element) {
1299 continue;
1300 }
1301 if (child_element->is_selected()) {
1302 child_element->set_drag(true);
1303 }
1304 }
1305
1306 } else {
1307 if (_filter_input(mb->get_position())) {
1308 return;
1309 }
1310 if (panner->is_panning()) {
1311 return;
1312 }
1313
1314 // Left-clicked on empty space, start box select.
1315 box_selecting = true;
1316 box_selecting_from = mb->get_position();
1317 if (mb->is_ctrl_pressed()) {
1318 box_selection_mode_additive = true;
1319 prev_selected.clear();
1320 for (int i = get_child_count() - 1; i >= 0; i--) {
1321 GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
1322 if (!child_element || !child_element->is_selected()) {
1323 continue;
1324 }
1325
1326 prev_selected.push_back(child_element);
1327 }
1328 } else if (mb->is_shift_pressed()) {
1329 box_selection_mode_additive = false;
1330 prev_selected.clear();
1331 for (int i = get_child_count() - 1; i >= 0; i--) {
1332 GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
1333 if (!child_element || !child_element->is_selected()) {
1334 continue;
1335 }
1336
1337 prev_selected.push_back(child_element);
1338 }
1339 } else {
1340 box_selection_mode_additive = true;
1341 prev_selected.clear();
1342 for (int i = get_child_count() - 1; i >= 0; i--) {
1343 GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
1344 if (!child_element) {
1345 continue;
1346 }
1347
1348 child_element->set_selected(false);
1349 }
1350 }
1351 }
1352 }
1353
1354 if (mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed() && box_selecting) {
1355 // Box selection ended. Nodes were selected during mouse movement.
1356 box_selecting = false;
1357 box_selecting_rect = Rect2();
1358 prev_selected.clear();
1359 top_layer->queue_redraw();
1360 minimap->queue_redraw();
1361 }
1362 }
1363
1364 if (p_ev->is_pressed()) {
1365 if (p_ev->is_action("ui_graph_duplicate", true)) {
1366 emit_signal(SNAME("duplicate_nodes_request"));
1367 accept_event();
1368 } else if (p_ev->is_action("ui_copy", true)) {
1369 emit_signal(SNAME("copy_nodes_request"));
1370 accept_event();
1371 } else if (p_ev->is_action("ui_paste", true)) {
1372 emit_signal(SNAME("paste_nodes_request"));
1373 accept_event();
1374 } else if (p_ev->is_action("ui_graph_delete", true)) {
1375 TypedArray<StringName> nodes;
1376
1377 for (int i = 0; i < get_child_count(); i++) {
1378 GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
1379 if (!gn) {
1380 continue;
1381 }
1382 if (gn->is_selected()) {
1383 nodes.push_back(gn->get_name());
1384 }
1385 }
1386
1387 emit_signal(SNAME("close_nodes_request"), nodes);
1388 accept_event();
1389 }
1390 }
1391}
1392
1393void GraphEdit::_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event) {
1394 h_scrollbar->set_value(h_scrollbar->get_value() - p_scroll_vec.x);
1395 v_scrollbar->set_value(v_scrollbar->get_value() - p_scroll_vec.y);
1396}
1397
1398void GraphEdit::_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event) {
1399 set_zoom_custom(zoom * p_zoom_factor, p_origin);
1400}
1401
1402void GraphEdit::set_connection_activity(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port, float p_activity) {
1403 for (Connection &E : connections) {
1404 if (E.from_node == p_from && E.from_port == p_from_port && E.to_node == p_to && E.to_port == p_to_port) {
1405 if (Math::is_equal_approx(E.activity, p_activity)) {
1406 // Update only if changed.
1407 top_layer->queue_redraw();
1408 minimap->queue_redraw();
1409 connections_layer->queue_redraw();
1410 }
1411 E.activity = p_activity;
1412 return;
1413 }
1414 }
1415}
1416
1417void GraphEdit::clear_connections() {
1418 connections.clear();
1419 minimap->queue_redraw();
1420 queue_redraw();
1421 connections_layer->queue_redraw();
1422}
1423
1424void GraphEdit::force_connection_drag_end() {
1425 ERR_FAIL_COND_MSG(!connecting, "Drag end requested without active drag!");
1426 connecting = false;
1427 connecting_valid = false;
1428 top_layer->queue_redraw();
1429 minimap->queue_redraw();
1430 queue_redraw();
1431 connections_layer->queue_redraw();
1432 emit_signal(SNAME("connection_drag_ended"));
1433}
1434
1435bool GraphEdit::is_node_hover_valid(const StringName &p_from, const int p_from_port, const StringName &p_to, const int p_to_port) {
1436 bool valid = true;
1437 GDVIRTUAL_CALL(_is_node_hover_valid, p_from, p_from_port, p_to, p_to_port, valid);
1438 return valid;
1439}
1440
1441void GraphEdit::set_panning_scheme(PanningScheme p_scheme) {
1442 panning_scheme = p_scheme;
1443 panner->set_control_scheme((ViewPanner::ControlScheme)p_scheme);
1444}
1445
1446GraphEdit::PanningScheme GraphEdit::get_panning_scheme() const {
1447 return panning_scheme;
1448}
1449
1450void GraphEdit::set_zoom(float p_zoom) {
1451 set_zoom_custom(p_zoom, get_size() / 2);
1452}
1453
1454void GraphEdit::set_zoom_custom(float p_zoom, const Vector2 &p_center) {
1455 p_zoom = CLAMP(p_zoom, zoom_min, zoom_max);
1456 if (zoom == p_zoom) {
1457 return;
1458 }
1459
1460 Vector2 scrollbar_offset = (Vector2(h_scrollbar->get_value(), v_scrollbar->get_value()) + p_center) / zoom;
1461
1462 zoom = p_zoom;
1463 top_layer->queue_redraw();
1464
1465 zoom_minus_button->set_disabled(zoom == zoom_min);
1466 zoom_plus_button->set_disabled(zoom == zoom_max);
1467
1468 _update_scroll();
1469 minimap->queue_redraw();
1470 connections_layer->queue_redraw();
1471
1472 if (is_visible_in_tree()) {
1473 Vector2 offset = scrollbar_offset * zoom - p_center;
1474 h_scrollbar->set_value(offset.x);
1475 v_scrollbar->set_value(offset.y);
1476 }
1477
1478 _update_zoom_label();
1479 queue_redraw();
1480}
1481
1482float GraphEdit::get_zoom() const {
1483 return zoom;
1484}
1485
1486void GraphEdit::set_zoom_step(float p_zoom_step) {
1487 p_zoom_step = abs(p_zoom_step);
1488 ERR_FAIL_COND(!isfinite(p_zoom_step));
1489 if (zoom_step == p_zoom_step) {
1490 return;
1491 }
1492
1493 zoom_step = p_zoom_step;
1494 panner->set_scroll_zoom_factor(zoom_step);
1495}
1496
1497float GraphEdit::get_zoom_step() const {
1498 return zoom_step;
1499}
1500
1501void GraphEdit::set_zoom_min(float p_zoom_min) {
1502 ERR_FAIL_COND_MSG(p_zoom_min > zoom_max, "Cannot set min zoom level greater than max zoom level.");
1503
1504 if (zoom_min == p_zoom_min) {
1505 return;
1506 }
1507
1508 zoom_min = p_zoom_min;
1509 set_zoom(zoom);
1510}
1511
1512float GraphEdit::get_zoom_min() const {
1513 return zoom_min;
1514}
1515
1516void GraphEdit::set_zoom_max(float p_zoom_max) {
1517 ERR_FAIL_COND_MSG(p_zoom_max < zoom_min, "Cannot set max zoom level lesser than min zoom level.");
1518
1519 if (zoom_max == p_zoom_max) {
1520 return;
1521 }
1522
1523 zoom_max = p_zoom_max;
1524 set_zoom(zoom);
1525}
1526
1527float GraphEdit::get_zoom_max() const {
1528 return zoom_max;
1529}
1530
1531void GraphEdit::set_show_zoom_label(bool p_enable) {
1532 if (zoom_label->is_visible() == p_enable) {
1533 return;
1534 }
1535
1536 zoom_label->set_visible(p_enable);
1537}
1538
1539bool GraphEdit::is_showing_zoom_label() const {
1540 return zoom_label->is_visible();
1541}
1542
1543void GraphEdit::set_right_disconnects(bool p_enable) {
1544 right_disconnects = p_enable;
1545}
1546
1547bool GraphEdit::is_right_disconnects_enabled() const {
1548 return right_disconnects;
1549}
1550
1551void GraphEdit::add_valid_right_disconnect_type(int p_type) {
1552 valid_right_disconnect_types.insert(p_type);
1553}
1554
1555void GraphEdit::remove_valid_right_disconnect_type(int p_type) {
1556 valid_right_disconnect_types.erase(p_type);
1557}
1558
1559void GraphEdit::add_valid_left_disconnect_type(int p_type) {
1560 valid_left_disconnect_types.insert(p_type);
1561}
1562
1563void GraphEdit::remove_valid_left_disconnect_type(int p_type) {
1564 valid_left_disconnect_types.erase(p_type);
1565}
1566
1567TypedArray<Dictionary> GraphEdit::_get_connection_list() const {
1568 List<Connection> conns;
1569 get_connection_list(&conns);
1570 TypedArray<Dictionary> arr;
1571 for (const Connection &E : conns) {
1572 Dictionary d;
1573 d["from_node"] = E.from_node;
1574 d["from_port"] = E.from_port;
1575 d["to_node"] = E.to_node;
1576 d["to_port"] = E.to_port;
1577 arr.push_back(d);
1578 }
1579 return arr;
1580}
1581
1582void GraphEdit::_zoom_minus() {
1583 set_zoom(zoom / zoom_step);
1584}
1585
1586void GraphEdit::_zoom_reset() {
1587 set_zoom(1);
1588}
1589
1590void GraphEdit::_zoom_plus() {
1591 set_zoom(zoom * zoom_step);
1592}
1593
1594void GraphEdit::_update_zoom_label() {
1595 int zoom_percent = static_cast<int>(Math::round(zoom * 100));
1596 String zoom_text = itos(zoom_percent) + "%";
1597 zoom_label->set_text(zoom_text);
1598}
1599
1600void GraphEdit::add_valid_connection_type(int p_type, int p_with_type) {
1601 ConnectionType ct(p_type, p_with_type);
1602 valid_connection_types.insert(ct);
1603}
1604
1605void GraphEdit::remove_valid_connection_type(int p_type, int p_with_type) {
1606 ConnectionType ct(p_type, p_with_type);
1607 valid_connection_types.erase(ct);
1608}
1609
1610bool GraphEdit::is_valid_connection_type(int p_type, int p_with_type) const {
1611 ConnectionType ct(p_type, p_with_type);
1612 return valid_connection_types.has(ct);
1613}
1614
1615void GraphEdit::set_snapping_enabled(bool p_enable) {
1616 if (snapping_enabled == p_enable) {
1617 return;
1618 }
1619
1620 snapping_enabled = p_enable;
1621 toggle_snapping_button->set_pressed(p_enable);
1622 queue_redraw();
1623}
1624
1625bool GraphEdit::is_snapping_enabled() const {
1626 return snapping_enabled;
1627}
1628
1629void GraphEdit::set_snapping_distance(int p_snapping_distance) {
1630 ERR_FAIL_COND_MSG(p_snapping_distance < GRID_MIN_SNAPPING_DISTANCE || p_snapping_distance > GRID_MAX_SNAPPING_DISTANCE,
1631 vformat("GraphEdit's snapping distance must be between %d and %d (inclusive)", GRID_MIN_SNAPPING_DISTANCE, GRID_MAX_SNAPPING_DISTANCE));
1632 snapping_distance = p_snapping_distance;
1633 snapping_distance_spinbox->set_value(p_snapping_distance);
1634 queue_redraw();
1635}
1636
1637int GraphEdit::get_snapping_distance() const {
1638 return snapping_distance;
1639}
1640
1641void GraphEdit::set_show_grid(bool p_show) {
1642 if (show_grid == p_show) {
1643 return;
1644 }
1645
1646 show_grid = p_show;
1647 show_grid_button->set_pressed(p_show);
1648 queue_redraw();
1649}
1650
1651bool GraphEdit::is_showing_grid() const {
1652 return show_grid;
1653}
1654
1655void GraphEdit::_snapping_toggled() {
1656 snapping_enabled = toggle_snapping_button->is_pressed();
1657}
1658
1659void GraphEdit::_snapping_distance_changed(double) {
1660 snapping_distance = snapping_distance_spinbox->get_value();
1661 queue_redraw();
1662}
1663
1664void GraphEdit::_show_grid_toggled() {
1665 show_grid = show_grid_button->is_pressed();
1666 queue_redraw();
1667}
1668
1669void GraphEdit::set_minimap_size(Vector2 p_size) {
1670 minimap->set_size(p_size);
1671 Vector2 minimap_size = minimap->get_size(); // The size might've been adjusted by the minimum size.
1672
1673 minimap->set_anchors_preset(Control::PRESET_BOTTOM_RIGHT);
1674 minimap->set_offset(Side::SIDE_LEFT, -minimap_size.width - MINIMAP_OFFSET);
1675 minimap->set_offset(Side::SIDE_TOP, -minimap_size.height - MINIMAP_OFFSET);
1676 minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
1677 minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
1678 minimap->queue_redraw();
1679}
1680
1681Vector2 GraphEdit::get_minimap_size() const {
1682 return minimap->get_size();
1683}
1684
1685void GraphEdit::set_minimap_opacity(float p_opacity) {
1686 if (minimap->get_modulate().a == p_opacity) {
1687 return;
1688 }
1689 minimap->set_modulate(Color(1, 1, 1, p_opacity));
1690 minimap->queue_redraw();
1691}
1692
1693float GraphEdit::get_minimap_opacity() const {
1694 Color minimap_modulate = minimap->get_modulate();
1695 return minimap_modulate.a;
1696}
1697
1698void GraphEdit::set_minimap_enabled(bool p_enable) {
1699 if (minimap_button->is_pressed() == p_enable) {
1700 return;
1701 }
1702 minimap_button->set_pressed(p_enable);
1703 _minimap_toggled();
1704 minimap->queue_redraw();
1705}
1706
1707bool GraphEdit::is_minimap_enabled() const {
1708 return minimap_button->is_pressed();
1709}
1710
1711void GraphEdit::set_arrange_nodes_button_hidden(bool p_enable) {
1712 arrange_nodes_button_hidden = p_enable;
1713 if (arrange_nodes_button_hidden) {
1714 layout_button->hide();
1715 } else {
1716 layout_button->show();
1717 }
1718}
1719
1720bool GraphEdit::is_arrange_nodes_button_hidden() const {
1721 return arrange_nodes_button_hidden;
1722}
1723
1724void GraphEdit::_minimap_toggled() {
1725 if (is_minimap_enabled()) {
1726 minimap->set_visible(true);
1727 minimap->queue_redraw();
1728 } else {
1729 minimap->set_visible(false);
1730 }
1731}
1732
1733void GraphEdit::set_connection_lines_curvature(float p_curvature) {
1734 lines_curvature = p_curvature;
1735 queue_redraw();
1736}
1737
1738float GraphEdit::get_connection_lines_curvature() const {
1739 return lines_curvature;
1740}
1741
1742void GraphEdit::set_connection_lines_thickness(float p_thickness) {
1743 if (lines_thickness == p_thickness) {
1744 return;
1745 }
1746 lines_thickness = p_thickness;
1747 queue_redraw();
1748}
1749
1750float GraphEdit::get_connection_lines_thickness() const {
1751 return lines_thickness;
1752}
1753
1754void GraphEdit::set_connection_lines_antialiased(bool p_antialiased) {
1755 if (lines_antialiased == p_antialiased) {
1756 return;
1757 }
1758 lines_antialiased = p_antialiased;
1759 queue_redraw();
1760}
1761
1762bool GraphEdit::is_connection_lines_antialiased() const {
1763 return lines_antialiased;
1764}
1765
1766HBoxContainer *GraphEdit::get_menu_hbox() {
1767 return menu_hbox;
1768}
1769
1770Ref<ViewPanner> GraphEdit::get_panner() {
1771 return panner;
1772}
1773
1774void GraphEdit::set_warped_panning(bool p_warped) {
1775 warped_panning = p_warped;
1776}
1777
1778void GraphEdit::arrange_nodes() {
1779 arranger->arrange_nodes();
1780}
1781
1782void GraphEdit::_bind_methods() {
1783 ClassDB::bind_method(D_METHOD("connect_node", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::connect_node);
1784 ClassDB::bind_method(D_METHOD("is_node_connected", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::is_node_connected);
1785 ClassDB::bind_method(D_METHOD("disconnect_node", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::disconnect_node);
1786 ClassDB::bind_method(D_METHOD("set_connection_activity", "from_node", "from_port", "to_node", "to_port", "amount"), &GraphEdit::set_connection_activity);
1787 ClassDB::bind_method(D_METHOD("get_connection_list"), &GraphEdit::_get_connection_list);
1788 ClassDB::bind_method(D_METHOD("clear_connections"), &GraphEdit::clear_connections);
1789 ClassDB::bind_method(D_METHOD("force_connection_drag_end"), &GraphEdit::force_connection_drag_end);
1790 ClassDB::bind_method(D_METHOD("get_scroll_offset"), &GraphEdit::get_scroll_offset);
1791 ClassDB::bind_method(D_METHOD("set_scroll_offset", "offset"), &GraphEdit::set_scroll_offset);
1792
1793 ClassDB::bind_method(D_METHOD("add_valid_right_disconnect_type", "type"), &GraphEdit::add_valid_right_disconnect_type);
1794 ClassDB::bind_method(D_METHOD("remove_valid_right_disconnect_type", "type"), &GraphEdit::remove_valid_right_disconnect_type);
1795 ClassDB::bind_method(D_METHOD("add_valid_left_disconnect_type", "type"), &GraphEdit::add_valid_left_disconnect_type);
1796 ClassDB::bind_method(D_METHOD("remove_valid_left_disconnect_type", "type"), &GraphEdit::remove_valid_left_disconnect_type);
1797 ClassDB::bind_method(D_METHOD("add_valid_connection_type", "from_type", "to_type"), &GraphEdit::add_valid_connection_type);
1798 ClassDB::bind_method(D_METHOD("remove_valid_connection_type", "from_type", "to_type"), &GraphEdit::remove_valid_connection_type);
1799 ClassDB::bind_method(D_METHOD("is_valid_connection_type", "from_type", "to_type"), &GraphEdit::is_valid_connection_type);
1800 ClassDB::bind_method(D_METHOD("get_connection_line", "from_node", "to_node"), &GraphEdit::get_connection_line);
1801
1802 ClassDB::bind_method(D_METHOD("set_panning_scheme", "scheme"), &GraphEdit::set_panning_scheme);
1803 ClassDB::bind_method(D_METHOD("get_panning_scheme"), &GraphEdit::get_panning_scheme);
1804
1805 ClassDB::bind_method(D_METHOD("set_zoom", "zoom"), &GraphEdit::set_zoom);
1806 ClassDB::bind_method(D_METHOD("get_zoom"), &GraphEdit::get_zoom);
1807
1808 ClassDB::bind_method(D_METHOD("set_zoom_min", "zoom_min"), &GraphEdit::set_zoom_min);
1809 ClassDB::bind_method(D_METHOD("get_zoom_min"), &GraphEdit::get_zoom_min);
1810
1811 ClassDB::bind_method(D_METHOD("set_zoom_max", "zoom_max"), &GraphEdit::set_zoom_max);
1812 ClassDB::bind_method(D_METHOD("get_zoom_max"), &GraphEdit::get_zoom_max);
1813
1814 ClassDB::bind_method(D_METHOD("set_zoom_step", "zoom_step"), &GraphEdit::set_zoom_step);
1815 ClassDB::bind_method(D_METHOD("get_zoom_step"), &GraphEdit::get_zoom_step);
1816
1817 ClassDB::bind_method(D_METHOD("set_show_zoom_label", "enable"), &GraphEdit::set_show_zoom_label);
1818 ClassDB::bind_method(D_METHOD("is_showing_zoom_label"), &GraphEdit::is_showing_zoom_label);
1819
1820 ClassDB::bind_method(D_METHOD("set_show_grid", "enable"), &GraphEdit::set_show_grid);
1821 ClassDB::bind_method(D_METHOD("is_showing_grid"), &GraphEdit::is_showing_grid);
1822
1823 ClassDB::bind_method(D_METHOD("set_snapping_enabled", "enable"), &GraphEdit::set_snapping_enabled);
1824 ClassDB::bind_method(D_METHOD("is_snapping_enabled"), &GraphEdit::is_snapping_enabled);
1825
1826 ClassDB::bind_method(D_METHOD("set_snapping_distance", "pixels"), &GraphEdit::set_snapping_distance);
1827 ClassDB::bind_method(D_METHOD("get_snapping_distance"), &GraphEdit::get_snapping_distance);
1828
1829 ClassDB::bind_method(D_METHOD("set_connection_lines_curvature", "curvature"), &GraphEdit::set_connection_lines_curvature);
1830 ClassDB::bind_method(D_METHOD("get_connection_lines_curvature"), &GraphEdit::get_connection_lines_curvature);
1831
1832 ClassDB::bind_method(D_METHOD("set_connection_lines_thickness", "pixels"), &GraphEdit::set_connection_lines_thickness);
1833 ClassDB::bind_method(D_METHOD("get_connection_lines_thickness"), &GraphEdit::get_connection_lines_thickness);
1834
1835 ClassDB::bind_method(D_METHOD("set_connection_lines_antialiased", "pixels"), &GraphEdit::set_connection_lines_antialiased);
1836 ClassDB::bind_method(D_METHOD("is_connection_lines_antialiased"), &GraphEdit::is_connection_lines_antialiased);
1837
1838 ClassDB::bind_method(D_METHOD("set_minimap_size", "size"), &GraphEdit::set_minimap_size);
1839 ClassDB::bind_method(D_METHOD("get_minimap_size"), &GraphEdit::get_minimap_size);
1840 ClassDB::bind_method(D_METHOD("set_minimap_opacity", "opacity"), &GraphEdit::set_minimap_opacity);
1841 ClassDB::bind_method(D_METHOD("get_minimap_opacity"), &GraphEdit::get_minimap_opacity);
1842
1843 ClassDB::bind_method(D_METHOD("set_minimap_enabled", "enable"), &GraphEdit::set_minimap_enabled);
1844 ClassDB::bind_method(D_METHOD("is_minimap_enabled"), &GraphEdit::is_minimap_enabled);
1845
1846 ClassDB::bind_method(D_METHOD("set_arrange_nodes_button_hidden", "enable"), &GraphEdit::set_arrange_nodes_button_hidden);
1847 ClassDB::bind_method(D_METHOD("is_arrange_nodes_button_hidden"), &GraphEdit::is_arrange_nodes_button_hidden);
1848
1849 ClassDB::bind_method(D_METHOD("set_right_disconnects", "enable"), &GraphEdit::set_right_disconnects);
1850 ClassDB::bind_method(D_METHOD("is_right_disconnects_enabled"), &GraphEdit::is_right_disconnects_enabled);
1851
1852 GDVIRTUAL_BIND(_is_in_input_hotzone, "in_node", "in_port", "mouse_position");
1853 GDVIRTUAL_BIND(_is_in_output_hotzone, "in_node", "in_port", "mouse_position");
1854
1855 ClassDB::bind_method(D_METHOD("get_menu_hbox"), &GraphEdit::get_menu_hbox);
1856
1857 ClassDB::bind_method(D_METHOD("arrange_nodes"), &GraphEdit::arrange_nodes);
1858
1859 ClassDB::bind_method(D_METHOD("set_selected", "node"), &GraphEdit::set_selected);
1860
1861 GDVIRTUAL_BIND(_get_connection_line, "from_position", "to_position")
1862 GDVIRTUAL_BIND(_is_node_hover_valid, "from_node", "from_port", "to_node", "to_port");
1863
1864 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "right_disconnects"), "set_right_disconnects", "is_right_disconnects_enabled");
1865 ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "scroll_offset", PROPERTY_HINT_NONE, "suffix:px"), "set_scroll_offset", "get_scroll_offset");
1866 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_grid"), "set_show_grid", "is_showing_grid");
1867 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "snapping_enabled"), "set_snapping_enabled", "is_snapping_enabled");
1868 ADD_PROPERTY(PropertyInfo(Variant::INT, "snapping_distance", PROPERTY_HINT_NONE, "suffix:px"), "set_snapping_distance", "get_snapping_distance");
1869 ADD_PROPERTY(PropertyInfo(Variant::INT, "panning_scheme", PROPERTY_HINT_ENUM, "Scroll Zooms,Scroll Pans"), "set_panning_scheme", "get_panning_scheme");
1870
1871 ADD_GROUP("Connection Lines", "connection_lines");
1872 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "connection_lines_curvature"), "set_connection_lines_curvature", "get_connection_lines_curvature");
1873 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "connection_lines_thickness", PROPERTY_HINT_NONE, "suffix:px"), "set_connection_lines_thickness", "get_connection_lines_thickness");
1874 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "connection_lines_antialiased"), "set_connection_lines_antialiased", "is_connection_lines_antialiased");
1875
1876 ADD_GROUP("Zoom", "");
1877 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom"), "set_zoom", "get_zoom");
1878 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_min"), "set_zoom_min", "get_zoom_min");
1879 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_max"), "set_zoom_max", "get_zoom_max");
1880 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_step"), "set_zoom_step", "get_zoom_step");
1881 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_zoom_label"), "set_show_zoom_label", "is_showing_zoom_label");
1882
1883 ADD_GROUP("Minimap", "minimap_");
1884 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "minimap_enabled"), "set_minimap_enabled", "is_minimap_enabled");
1885 ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "minimap_size", PROPERTY_HINT_NONE, "suffix:px"), "set_minimap_size", "get_minimap_size");
1886 ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "minimap_opacity"), "set_minimap_opacity", "get_minimap_opacity");
1887
1888 ADD_GROUP("UI", "");
1889 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "arrange_nodes_button_hidden"), "set_arrange_nodes_button_hidden", "is_arrange_nodes_button_hidden");
1890
1891 ADD_SIGNAL(MethodInfo("connection_request", PropertyInfo(Variant::STRING_NAME, "from_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::STRING_NAME, "to_node"), PropertyInfo(Variant::INT, "to_port")));
1892 ADD_SIGNAL(MethodInfo("disconnection_request", PropertyInfo(Variant::STRING_NAME, "from_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::STRING_NAME, "to_node"), PropertyInfo(Variant::INT, "to_port")));
1893 ADD_SIGNAL(MethodInfo("popup_request", PropertyInfo(Variant::VECTOR2, "position")));
1894 ADD_SIGNAL(MethodInfo("duplicate_nodes_request"));
1895 ADD_SIGNAL(MethodInfo("copy_nodes_request"));
1896 ADD_SIGNAL(MethodInfo("paste_nodes_request"));
1897 ADD_SIGNAL(MethodInfo("node_selected", PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
1898 ADD_SIGNAL(MethodInfo("node_deselected", PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
1899 ADD_SIGNAL(MethodInfo("connection_to_empty", PropertyInfo(Variant::STRING_NAME, "from_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::VECTOR2, "release_position")));
1900 ADD_SIGNAL(MethodInfo("connection_from_empty", PropertyInfo(Variant::STRING_NAME, "to_node"), PropertyInfo(Variant::INT, "to_port"), PropertyInfo(Variant::VECTOR2, "release_position")));
1901 ADD_SIGNAL(MethodInfo("close_nodes_request", PropertyInfo(Variant::ARRAY, "nodes", PROPERTY_HINT_ARRAY_TYPE, "StringName")));
1902 ADD_SIGNAL(MethodInfo("begin_node_move"));
1903 ADD_SIGNAL(MethodInfo("end_node_move"));
1904 ADD_SIGNAL(MethodInfo("scroll_offset_changed", PropertyInfo(Variant::VECTOR2, "offset")));
1905 ADD_SIGNAL(MethodInfo("connection_drag_started", PropertyInfo(Variant::STRING_NAME, "from_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::BOOL, "is_output")));
1906 ADD_SIGNAL(MethodInfo("connection_drag_ended"));
1907
1908 BIND_ENUM_CONSTANT(SCROLL_ZOOMS);
1909 BIND_ENUM_CONSTANT(SCROLL_PANS);
1910
1911 BIND_THEME_ITEM(Theme::DATA_TYPE_STYLEBOX, GraphEdit, panel);
1912 BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, GraphEdit, grid_major);
1913 BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, GraphEdit, grid_minor);
1914
1915 BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_COLOR, GraphEdit, activity_color, "activity");
1916 BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, GraphEdit, selection_fill);
1917 BIND_THEME_ITEM(Theme::DATA_TYPE_COLOR, GraphEdit, selection_stroke);
1918
1919 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, zoom_in);
1920 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, zoom_out);
1921 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, zoom_reset);
1922
1923 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, snapping_toggle);
1924 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, grid_toggle);
1925 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, minimap_toggle);
1926 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphEdit, layout);
1927
1928 BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, GraphEdit, port_hotzone_inner_extent);
1929 BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, GraphEdit, port_hotzone_outer_extent);
1930}
1931
1932GraphEdit::GraphEdit() {
1933 set_focus_mode(FOCUS_ALL);
1934
1935 // Allow dezooming 8 times from the default zoom level.
1936 // At low zoom levels, text is unreadable due to its small size and poor filtering,
1937 // but this is still useful for previewing and navigation.
1938 zoom_min = (1 / Math::pow(zoom_step, 8));
1939 // Allow zooming 4 times from the default zoom level.
1940 zoom_max = (1 * Math::pow(zoom_step, 4));
1941
1942 panner.instantiate();
1943 panner->set_callbacks(callable_mp(this, &GraphEdit::_pan_callback), callable_mp(this, &GraphEdit::_zoom_callback));
1944
1945 top_layer = memnew(GraphEditFilter(this));
1946 add_child(top_layer, false, INTERNAL_MODE_BACK);
1947 top_layer->set_mouse_filter(MOUSE_FILTER_PASS);
1948 top_layer->set_anchors_and_offsets_preset(Control::PRESET_FULL_RECT);
1949 top_layer->connect("draw", callable_mp(this, &GraphEdit::_top_layer_draw));
1950 top_layer->connect("gui_input", callable_mp(this, &GraphEdit::_top_layer_input));
1951 top_layer->connect("focus_exited", callable_mp(panner.ptr(), &ViewPanner::release_pan_key));
1952
1953 connections_layer = memnew(Control);
1954 add_child(connections_layer, false);
1955 connections_layer->connect("draw", callable_mp(this, &GraphEdit::_connections_layer_draw));
1956 connections_layer->set_name("_connection_layer");
1957 connections_layer->set_disable_visibility_clip(true); // Necessary, so it can draw freely and be offset.
1958 connections_layer->set_mouse_filter(MOUSE_FILTER_IGNORE);
1959
1960 h_scrollbar = memnew(HScrollBar);
1961 h_scrollbar->set_name("_h_scroll");
1962 top_layer->add_child(h_scrollbar);
1963
1964 v_scrollbar = memnew(VScrollBar);
1965 v_scrollbar->set_name("_v_scroll");
1966 top_layer->add_child(v_scrollbar);
1967
1968 // Set large minmax so it can scroll even if not resized yet.
1969 h_scrollbar->set_min(-10000);
1970 h_scrollbar->set_max(10000);
1971
1972 v_scrollbar->set_min(-10000);
1973 v_scrollbar->set_max(10000);
1974
1975 h_scrollbar->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
1976 v_scrollbar->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
1977
1978 menu_hbox = memnew(HBoxContainer);
1979 top_layer->add_child(menu_hbox);
1980 menu_hbox->set_position(Vector2(10, 10));
1981
1982 zoom_label = memnew(Label);
1983 menu_hbox->add_child(zoom_label);
1984 zoom_label->set_visible(false);
1985 zoom_label->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
1986 zoom_label->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
1987 zoom_label->set_custom_minimum_size(Size2(48, 0));
1988 _update_zoom_label();
1989
1990 zoom_minus_button = memnew(Button);
1991 zoom_minus_button->set_flat(true);
1992 menu_hbox->add_child(zoom_minus_button);
1993 zoom_minus_button->set_tooltip_text(RTR("Zoom Out"));
1994 zoom_minus_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_minus));
1995 zoom_minus_button->set_focus_mode(FOCUS_NONE);
1996
1997 zoom_reset_button = memnew(Button);
1998 zoom_reset_button->set_flat(true);
1999 menu_hbox->add_child(zoom_reset_button);
2000 zoom_reset_button->set_tooltip_text(RTR("Zoom Reset"));
2001 zoom_reset_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_reset));
2002 zoom_reset_button->set_focus_mode(FOCUS_NONE);
2003
2004 zoom_plus_button = memnew(Button);
2005 zoom_plus_button->set_flat(true);
2006 menu_hbox->add_child(zoom_plus_button);
2007 zoom_plus_button->set_tooltip_text(RTR("Zoom In"));
2008 zoom_plus_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_plus));
2009 zoom_plus_button->set_focus_mode(FOCUS_NONE);
2010
2011 show_grid_button = memnew(Button);
2012 show_grid_button->set_flat(true);
2013 show_grid_button->set_toggle_mode(true);
2014 show_grid_button->set_tooltip_text(RTR("Toggle the visual grid."));
2015 show_grid_button->connect("pressed", callable_mp(this, &GraphEdit::_show_grid_toggled));
2016 show_grid_button->set_pressed(true);
2017 show_grid_button->set_focus_mode(FOCUS_NONE);
2018 menu_hbox->add_child(show_grid_button);
2019
2020 toggle_snapping_button = memnew(Button);
2021 toggle_snapping_button->set_flat(true);
2022 toggle_snapping_button->set_toggle_mode(true);
2023 toggle_snapping_button->set_tooltip_text(RTR("Toggle snapping to the grid."));
2024 toggle_snapping_button->connect("pressed", callable_mp(this, &GraphEdit::_snapping_toggled));
2025 toggle_snapping_button->set_pressed(snapping_enabled);
2026 toggle_snapping_button->set_focus_mode(FOCUS_NONE);
2027 menu_hbox->add_child(toggle_snapping_button);
2028
2029 snapping_distance_spinbox = memnew(SpinBox);
2030 snapping_distance_spinbox->set_min(GRID_MIN_SNAPPING_DISTANCE);
2031 snapping_distance_spinbox->set_max(GRID_MAX_SNAPPING_DISTANCE);
2032 snapping_distance_spinbox->set_step(1);
2033 snapping_distance_spinbox->set_value(snapping_distance);
2034 snapping_distance_spinbox->set_tooltip_text(RTR("Change the snapping distance."));
2035 snapping_distance_spinbox->connect("value_changed", callable_mp(this, &GraphEdit::_snapping_distance_changed));
2036 menu_hbox->add_child(snapping_distance_spinbox);
2037
2038 minimap_button = memnew(Button);
2039 minimap_button->set_flat(true);
2040 minimap_button->set_toggle_mode(true);
2041 minimap_button->set_tooltip_text(RTR("Toggle the graph minimap."));
2042 minimap_button->connect("pressed", callable_mp(this, &GraphEdit::_minimap_toggled));
2043 minimap_button->set_pressed(show_grid);
2044 minimap_button->set_focus_mode(FOCUS_NONE);
2045 menu_hbox->add_child(minimap_button);
2046
2047 layout_button = memnew(Button);
2048 layout_button->set_flat(true);
2049 menu_hbox->add_child(layout_button);
2050 layout_button->set_tooltip_text(RTR("Automatically arrange selected nodes."));
2051 layout_button->connect("pressed", callable_mp(this, &GraphEdit::arrange_nodes));
2052 layout_button->set_focus_mode(FOCUS_NONE);
2053
2054 Vector2 minimap_size = Vector2(240, 160);
2055 float minimap_opacity = 0.65;
2056
2057 minimap = memnew(GraphEditMinimap(this));
2058 top_layer->add_child(minimap);
2059 minimap->set_name("_minimap");
2060 minimap->set_modulate(Color(1, 1, 1, minimap_opacity));
2061 minimap->set_mouse_filter(MOUSE_FILTER_PASS);
2062 minimap->set_custom_minimum_size(Vector2(50, 50));
2063 minimap->set_size(minimap_size);
2064 minimap->set_anchors_preset(Control::PRESET_BOTTOM_RIGHT);
2065 minimap->set_offset(Side::SIDE_LEFT, -minimap_size.width - MINIMAP_OFFSET);
2066 minimap->set_offset(Side::SIDE_TOP, -minimap_size.height - MINIMAP_OFFSET);
2067 minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
2068 minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
2069 minimap->connect("draw", callable_mp(this, &GraphEdit::_minimap_draw));
2070
2071 set_clip_contents(true);
2072
2073 arranger = Ref<GraphEditArranger>(memnew(GraphEditArranger(this)));
2074}
2075