1/**************************************************************************/
2/* graph_element.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_element.h"
32
33#include "core/string/translation.h"
34#include "scene/gui/graph_edit.h"
35#include "scene/theme/theme_db.h"
36
37#ifdef TOOLS_ENABLED
38void GraphElement::_edit_set_position(const Point2 &p_position) {
39 GraphEdit *graph = Object::cast_to<GraphEdit>(get_parent());
40 if (graph) {
41 Point2 offset = (p_position + graph->get_scroll_offset()) * graph->get_zoom();
42 set_position_offset(offset);
43 }
44 set_position(p_position);
45}
46#endif
47
48void GraphElement::_resort() {
49 Size2 size = get_size();
50
51 for (int i = 0; i < get_child_count(); i++) {
52 Control *child = Object::cast_to<Control>(get_child(i));
53 if (!child || !child->is_visible_in_tree()) {
54 continue;
55 }
56 if (child->is_set_as_top_level()) {
57 continue;
58 }
59
60 fit_child_in_rect(child, Rect2(Point2(), size));
61 }
62}
63
64Size2 GraphElement::get_minimum_size() const {
65 Size2 minsize;
66 for (int i = 0; i < get_child_count(); i++) {
67 Control *child = Object::cast_to<Control>(get_child(i));
68 if (!child) {
69 continue;
70 }
71 if (child->is_set_as_top_level()) {
72 continue;
73 }
74
75 Size2i size = child->get_combined_minimum_size();
76
77 minsize.width = MAX(minsize.width, size.width);
78 minsize.height = MAX(minsize.height, size.height);
79 }
80
81 return minsize;
82}
83
84void GraphElement::_notification(int p_what) {
85 switch (p_what) {
86 case NOTIFICATION_SORT_CHILDREN: {
87 _resort();
88 } break;
89
90 case NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
91 case NOTIFICATION_TRANSLATION_CHANGED:
92 case NOTIFICATION_THEME_CHANGED: {
93 update_minimum_size();
94 queue_redraw();
95 } break;
96 }
97}
98
99void GraphElement::_validate_property(PropertyInfo &p_property) const {
100 Control::_validate_property(p_property);
101 GraphEdit *graph = Object::cast_to<GraphEdit>(get_parent());
102 if (graph) {
103 if (p_property.name == "position") {
104 p_property.usage |= PROPERTY_USAGE_READ_ONLY;
105 }
106 }
107}
108
109void GraphElement::set_position_offset(const Vector2 &p_offset) {
110 if (position_offset == p_offset) {
111 return;
112 }
113
114 position_offset = p_offset;
115 emit_signal(SNAME("position_offset_changed"));
116 queue_redraw();
117}
118
119Vector2 GraphElement::get_position_offset() const {
120 return position_offset;
121}
122
123void GraphElement::set_selected(bool p_selected) {
124 if (!is_selectable() || selected == p_selected) {
125 return;
126 }
127 selected = p_selected;
128 emit_signal(p_selected ? SNAME("node_selected") : SNAME("node_deselected"));
129 queue_redraw();
130}
131
132bool GraphElement::is_selected() {
133 return selected;
134}
135
136void GraphElement::set_drag(bool p_drag) {
137 if (p_drag) {
138 drag_from = get_position_offset();
139 } else {
140 emit_signal(SNAME("dragged"), drag_from, get_position_offset()); // Required for undo/redo.
141 }
142}
143
144Vector2 GraphElement::get_drag_from() {
145 return drag_from;
146}
147
148void GraphElement::gui_input(const Ref<InputEvent> &p_ev) {
149 ERR_FAIL_COND(p_ev.is_null());
150
151 Ref<InputEventMouseButton> mb = p_ev;
152 if (mb.is_valid()) {
153 ERR_FAIL_COND_MSG(get_parent_control() == nullptr, "GraphElement must be the child of a GraphEdit node.");
154
155 if (mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
156 Vector2 mpos = mb->get_position();
157
158 if (resizable && mpos.x > get_size().x - theme_cache.resizer->get_width() && mpos.y > get_size().y - theme_cache.resizer->get_height()) {
159 resizing = true;
160 resizing_from = mpos;
161 resizing_from_size = get_size();
162 accept_event();
163 return;
164 }
165
166 emit_signal(SNAME("raise_request"));
167 }
168
169 if (!mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
170 resizing = false;
171 }
172 }
173
174 Ref<InputEventMouseMotion> mm = p_ev;
175 if (resizing && mm.is_valid()) {
176 Vector2 mpos = mm->get_position();
177 Vector2 diff = mpos - resizing_from;
178
179 emit_signal(SNAME("resize_request"), resizing_from_size + diff);
180 }
181}
182
183void GraphElement::set_resizable(bool p_enable) {
184 if (resizable == p_enable) {
185 return;
186 }
187 resizable = p_enable;
188 queue_redraw();
189}
190
191bool GraphElement::is_resizable() const {
192 return resizable;
193}
194
195void GraphElement::set_draggable(bool p_draggable) {
196 draggable = p_draggable;
197}
198
199bool GraphElement::is_draggable() {
200 return draggable;
201}
202
203void GraphElement::set_selectable(bool p_selectable) {
204 if (!p_selectable) {
205 set_selected(false);
206 }
207 selectable = p_selectable;
208}
209
210bool GraphElement::is_selectable() {
211 return selectable;
212}
213
214void GraphElement::_bind_methods() {
215 ClassDB::bind_method(D_METHOD("set_resizable", "resizable"), &GraphElement::set_resizable);
216 ClassDB::bind_method(D_METHOD("is_resizable"), &GraphElement::is_resizable);
217
218 ClassDB::bind_method(D_METHOD("set_draggable", "draggable"), &GraphElement::set_draggable);
219 ClassDB::bind_method(D_METHOD("is_draggable"), &GraphElement::is_draggable);
220
221 ClassDB::bind_method(D_METHOD("set_selectable", "selectable"), &GraphElement::set_selectable);
222 ClassDB::bind_method(D_METHOD("is_selectable"), &GraphElement::is_selectable);
223
224 ClassDB::bind_method(D_METHOD("set_selected", "selected"), &GraphElement::set_selected);
225 ClassDB::bind_method(D_METHOD("is_selected"), &GraphElement::is_selected);
226
227 ClassDB::bind_method(D_METHOD("set_position_offset", "offset"), &GraphElement::set_position_offset);
228 ClassDB::bind_method(D_METHOD("get_position_offset"), &GraphElement::get_position_offset);
229
230 ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "position_offset"), "set_position_offset", "get_position_offset");
231 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "resizable"), "set_resizable", "is_resizable");
232 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draggable"), "set_draggable", "is_draggable");
233 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selectable"), "set_selectable", "is_selectable");
234 ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selected"), "set_selected", "is_selected");
235
236 ADD_SIGNAL(MethodInfo("position_offset_changed"));
237 ADD_SIGNAL(MethodInfo("node_selected"));
238 ADD_SIGNAL(MethodInfo("node_deselected"));
239 ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::VECTOR2, "from"), PropertyInfo(Variant::VECTOR2, "to")));
240 ADD_SIGNAL(MethodInfo("raise_request"));
241 ADD_SIGNAL(MethodInfo("close_request"));
242 ADD_SIGNAL(MethodInfo("resize_request", PropertyInfo(Variant::VECTOR2, "new_minsize")));
243
244 BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphElement, resizer);
245}
246