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godot/scene/gui/graph_edit.cpp
Umang Kalra 12fc3f1eef Automatic arrangement of nodes in VisualScript/VisualShaders editors 
This PR and commit adds the functionality to arrange nodes in VisualScript/VisualShader editor. The layout generated by this 
feature is compact, with minimum crossings between connections
& uniform horizontal & vertical gaps between the nodes. 

This work has been sponsored by GSoC '21.

Full list of additions/changes:
• Added arrange_nodes() method in GraphEdit module.
    • This method computes new positions for all the selected
      nodes by forming blocks and compressing them.
      The nodes are moved to these new positions. 
    • Adding this method to GraphEdit makes it available for 
      use in VisualScript/VisualShaders editors and its other
      subclasses. 
• Button with an icon has been added to call arrange_nodes() in GraphEdit. 
    • This button is inherited by VisualScript/VisualShaders editors
       to invoke the method.
• Undo/redo is functional with this method.
    • By using signals in arrange_nodes(), position changes are registered 
       in undo/redo stack of the subclass that is using the method. 
• Metadata of the method has been updated in ClassDB
• Method description has been added to class reference of GraphEdit
2021-08-11 00:44:28 +05:30

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/*************************************************************************/
/* graph_edit.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "graph_edit.h"
#include "core/input/input.h"
#include "core/math/math_funcs.h"
#include "core/os/keyboard.h"
#include "scene/gui/box_container.h"
#include "scene/gui/button.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_scale.h"
#endif
constexpr int MINIMAP_OFFSET = 12;
constexpr int MINIMAP_PADDING = 5;
bool GraphEditFilter::has_point(const Point2 &p_point) const {
return ge->_filter_input(p_point);
}
GraphEditFilter::GraphEditFilter(GraphEdit *p_edit) {
ge = p_edit;
}
void GraphEditMinimap::_bind_methods() {
ClassDB::bind_method(D_METHOD("_gui_input"), &GraphEditMinimap::_gui_input);
}
GraphEditMinimap::GraphEditMinimap(GraphEdit *p_edit) {
ge = p_edit;
graph_proportions = Vector2(1, 1);
graph_padding = Vector2(0, 0);
camera_position = Vector2(100, 50);
camera_size = Vector2(200, 200);
minimap_padding = Vector2(MINIMAP_PADDING, MINIMAP_PADDING);
minimap_offset = minimap_padding + _convert_from_graph_position(graph_padding);
is_pressing = false;
is_resizing = false;
}
void GraphEditMinimap::update_minimap() {
Vector2 graph_offset = _get_graph_offset();
Vector2 graph_size = _get_graph_size();
camera_position = ge->get_scroll_ofs() - graph_offset;
camera_size = ge->get_size();
Vector2 render_size = _get_render_size();
float target_ratio = render_size.x / render_size.y;
float graph_ratio = graph_size.x / graph_size.y;
graph_proportions = graph_size;
graph_padding = Vector2(0, 0);
if (graph_ratio > target_ratio) {
graph_proportions.x = graph_size.x;
graph_proportions.y = graph_size.x / target_ratio;
graph_padding.y = Math::abs(graph_size.y - graph_proportions.y) / 2;
} else {
graph_proportions.x = graph_size.y * target_ratio;
graph_proportions.y = graph_size.y;
graph_padding.x = Math::abs(graph_size.x - graph_proportions.x) / 2;
}
// This centers minimap inside the minimap rectangle.
minimap_offset = minimap_padding + _convert_from_graph_position(graph_padding);
}
Rect2 GraphEditMinimap::get_camera_rect() {
Vector2 camera_center = _convert_from_graph_position(camera_position + camera_size / 2) + minimap_offset;
Vector2 camera_viewport = _convert_from_graph_position(camera_size);
Vector2 camera_position = (camera_center - camera_viewport / 2);
return Rect2(camera_position, camera_viewport);
}
Vector2 GraphEditMinimap::_get_render_size() {
if (!is_inside_tree()) {
return Vector2(0, 0);
}
return get_size() - 2 * minimap_padding;
}
Vector2 GraphEditMinimap::_get_graph_offset() {
return Vector2(ge->h_scroll->get_min(), ge->v_scroll->get_min());
}
Vector2 GraphEditMinimap::_get_graph_size() {
Vector2 graph_size = Vector2(ge->h_scroll->get_max(), ge->v_scroll->get_max()) - Vector2(ge->h_scroll->get_min(), ge->v_scroll->get_min());
if (graph_size.x == 0) {
graph_size.x = 1;
}
if (graph_size.y == 0) {
graph_size.y = 1;
}
return graph_size;
}
Vector2 GraphEditMinimap::_convert_from_graph_position(const Vector2 &p_position) {
Vector2 map_position = Vector2(0, 0);
Vector2 render_size = _get_render_size();
map_position.x = p_position.x * render_size.x / graph_proportions.x;
map_position.y = p_position.y * render_size.y / graph_proportions.y;
return map_position;
}
Vector2 GraphEditMinimap::_convert_to_graph_position(const Vector2 &p_position) {
Vector2 graph_position = Vector2(0, 0);
Vector2 render_size = _get_render_size();
graph_position.x = p_position.x * graph_proportions.x / render_size.x;
graph_position.y = p_position.y * graph_proportions.y / render_size.y;
return graph_position;
}
void GraphEditMinimap::_gui_input(const Ref<InputEvent> &p_ev) {
ERR_FAIL_COND(p_ev.is_null());
if (!ge->is_minimap_enabled()) {
return;
}
Ref<InputEventMouseButton> mb = p_ev;
Ref<InputEventMouseMotion> mm = p_ev;
if (mb.is_valid() && mb->get_button_index() == MOUSE_BUTTON_LEFT) {
if (mb->is_pressed()) {
is_pressing = true;
Ref<Texture2D> resizer = get_theme_icon(SNAME("resizer"));
Rect2 resizer_hitbox = Rect2(Point2(), resizer->get_size());
if (resizer_hitbox.has_point(mb->get_position())) {
is_resizing = true;
} else {
Vector2 click_position = _convert_to_graph_position(mb->get_position() - minimap_padding) - graph_padding;
_adjust_graph_scroll(click_position);
}
} else {
is_pressing = false;
is_resizing = false;
}
accept_event();
} else if (mm.is_valid() && is_pressing) {
if (is_resizing) {
// Prevent setting minimap wider than GraphEdit
Vector2 new_minimap_size;
new_minimap_size.x = MIN(get_size().x - mm->get_relative().x, ge->get_size().x - 2.0 * minimap_padding.x);
new_minimap_size.y = MIN(get_size().y - mm->get_relative().y, ge->get_size().y - 2.0 * minimap_padding.y);
ge->set_minimap_size(new_minimap_size);
update();
} else {
Vector2 click_position = _convert_to_graph_position(mm->get_position() - minimap_padding) - graph_padding;
_adjust_graph_scroll(click_position);
}
accept_event();
}
}
void GraphEditMinimap::_adjust_graph_scroll(const Vector2 &p_offset) {
Vector2 graph_offset = _get_graph_offset();
ge->set_scroll_ofs(p_offset + graph_offset - camera_size / 2);
}
Error GraphEdit::connect_node(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
if (is_node_connected(p_from, p_from_port, p_to, p_to_port)) {
return OK;
}
Connection c;
c.from = p_from;
c.from_port = p_from_port;
c.to = p_to;
c.to_port = p_to_port;
c.activity = 0;
connections.push_back(c);
top_layer->update();
minimap->update();
update();
connections_layer->update();
return OK;
}
bool GraphEdit::is_node_connected(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
for (const Connection &E : connections) {
if (E.from == p_from && E.from_port == p_from_port && E.to == p_to && E.to_port == p_to_port) {
return true;
}
}
return false;
}
void GraphEdit::disconnect_node(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port) {
for (const List<Connection>::Element *E = connections.front(); E; E = E->next()) {
if (E->get().from == p_from && E->get().from_port == p_from_port && E->get().to == p_to && E->get().to_port == p_to_port) {
connections.erase(E);
top_layer->update();
minimap->update();
update();
connections_layer->update();
return;
}
}
}
void GraphEdit::get_connection_list(List<Connection> *r_connections) const {
*r_connections = connections;
}
void GraphEdit::set_scroll_ofs(const Vector2 &p_ofs) {
setting_scroll_ofs = true;
h_scroll->set_value(p_ofs.x);
v_scroll->set_value(p_ofs.y);
_update_scroll();
setting_scroll_ofs = false;
}
Vector2 GraphEdit::get_scroll_ofs() const {
return Vector2(h_scroll->get_value(), v_scroll->get_value());
}
void GraphEdit::_scroll_moved(double) {
if (!awaiting_scroll_offset_update) {
call_deferred(SNAME("_update_scroll_offset"));
awaiting_scroll_offset_update = true;
}
top_layer->update();
minimap->update();
update();
if (!setting_scroll_ofs) { //in godot, signals on change value are avoided as a convention
emit_signal(SNAME("scroll_offset_changed"), get_scroll_ofs());
}
}
void GraphEdit::_update_scroll_offset() {
set_block_minimum_size_adjust(true);
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
Point2 pos = gn->get_position_offset() * zoom;
pos -= Point2(h_scroll->get_value(), v_scroll->get_value());
gn->set_position(pos);
if (gn->get_scale() != Vector2(zoom, zoom)) {
gn->set_scale(Vector2(zoom, zoom));
}
}
connections_layer->set_position(-Point2(h_scroll->get_value(), v_scroll->get_value()));
set_block_minimum_size_adjust(false);
awaiting_scroll_offset_update = false;
}
void GraphEdit::_update_scroll() {
if (updating) {
return;
}
updating = true;
set_block_minimum_size_adjust(true);
Rect2 screen;
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
Rect2 r;
r.position = gn->get_position_offset() * zoom;
r.size = gn->get_size() * zoom;
screen = screen.merge(r);
}
screen.position -= get_size();
screen.size += get_size() * 2.0;
h_scroll->set_min(screen.position.x);
h_scroll->set_max(screen.position.x + screen.size.x);
h_scroll->set_page(get_size().x);
if (h_scroll->get_max() - h_scroll->get_min() <= h_scroll->get_page()) {
h_scroll->hide();
} else {
h_scroll->show();
}
v_scroll->set_min(screen.position.y);
v_scroll->set_max(screen.position.y + screen.size.y);
v_scroll->set_page(get_size().y);
if (v_scroll->get_max() - v_scroll->get_min() <= v_scroll->get_page()) {
v_scroll->hide();
} else {
v_scroll->show();
}
Size2 hmin = h_scroll->get_combined_minimum_size();
Size2 vmin = v_scroll->get_combined_minimum_size();
// Avoid scrollbar overlapping.
h_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, v_scroll->is_visible() ? -vmin.width : 0);
v_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, h_scroll->is_visible() ? -hmin.height : 0);
set_block_minimum_size_adjust(false);
if (!awaiting_scroll_offset_update) {
call_deferred(SNAME("_update_scroll_offset"));
awaiting_scroll_offset_update = true;
}
updating = false;
}
void GraphEdit::_graph_node_raised(Node *p_gn) {
GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
ERR_FAIL_COND(!gn);
if (gn->is_comment()) {
move_child(gn, 0);
} else {
gn->raise();
}
int first_not_comment = 0;
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn2 = Object::cast_to<GraphNode>(get_child(i));
if (gn2 && !gn2->is_comment()) {
first_not_comment = i;
break;
}
}
move_child(connections_layer, first_not_comment);
top_layer->raise();
emit_signal(SNAME("node_selected"), p_gn);
}
void GraphEdit::_graph_node_moved(Node *p_gn) {
GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
ERR_FAIL_COND(!gn);
top_layer->update();
minimap->update();
update();
connections_layer->update();
}
void GraphEdit::_graph_node_slot_updated(int p_index, Node *p_gn) {
GraphNode *gn = Object::cast_to<GraphNode>(p_gn);
ERR_FAIL_COND(!gn);
top_layer->update();
minimap->update();
update();
connections_layer->update();
}
void GraphEdit::add_child_notify(Node *p_child) {
Control::add_child_notify(p_child);
top_layer->call_deferred(SNAME("raise")); // Top layer always on top!
GraphNode *gn = Object::cast_to<GraphNode>(p_child);
if (gn) {
gn->set_scale(Vector2(zoom, zoom));
gn->connect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved), varray(gn));
gn->connect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated), varray(gn));
gn->connect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised), varray(gn));
gn->connect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::update));
gn->connect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::update));
_graph_node_moved(gn);
gn->set_mouse_filter(MOUSE_FILTER_PASS);
}
}
void GraphEdit::remove_child_notify(Node *p_child) {
Control::remove_child_notify(p_child);
if (p_child == top_layer) {
top_layer = nullptr;
minimap = nullptr;
} else if (p_child == connections_layer) {
connections_layer = nullptr;
}
if (top_layer != nullptr && is_inside_tree()) {
top_layer->call_deferred(SNAME("raise")); // Top layer always on top!
}
GraphNode *gn = Object::cast_to<GraphNode>(p_child);
if (gn) {
gn->disconnect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_node_moved));
gn->disconnect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated));
gn->disconnect("raise_request", callable_mp(this, &GraphEdit::_graph_node_raised));
// In case of the whole GraphEdit being destroyed these references can already be freed.
if (connections_layer != nullptr && connections_layer->is_inside_tree()) {
gn->disconnect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::update));
}
if (minimap != nullptr && minimap->is_inside_tree()) {
gn->disconnect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::update));
}
}
}
void GraphEdit::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED) {
port_grab_distance_horizontal = get_theme_constant(SNAME("port_grab_distance_horizontal"));
port_grab_distance_vertical = get_theme_constant(SNAME("port_grab_distance_vertical"));
zoom_minus->set_icon(get_theme_icon(SNAME("minus")));
zoom_reset->set_icon(get_theme_icon(SNAME("reset")));
zoom_plus->set_icon(get_theme_icon(SNAME("more")));
snap_button->set_icon(get_theme_icon(SNAME("snap")));
minimap_button->set_icon(get_theme_icon(SNAME("minimap")));
layout_button->set_icon(get_theme_icon(SNAME("layout")));
}
if (p_what == NOTIFICATION_READY) {
Size2 hmin = h_scroll->get_combined_minimum_size();
Size2 vmin = v_scroll->get_combined_minimum_size();
h_scroll->set_anchor_and_offset(SIDE_LEFT, ANCHOR_BEGIN, 0);
h_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
h_scroll->set_anchor_and_offset(SIDE_TOP, ANCHOR_END, -hmin.height);
h_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
v_scroll->set_anchor_and_offset(SIDE_LEFT, ANCHOR_END, -vmin.width);
v_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
v_scroll->set_anchor_and_offset(SIDE_TOP, ANCHOR_BEGIN, 0);
v_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
}
if (p_what == NOTIFICATION_DRAW) {
draw_style_box(get_theme_stylebox(SNAME("bg")), Rect2(Point2(), get_size()));
if (is_using_snap()) {
//draw grid
int snap = get_snap();
Vector2 offset = get_scroll_ofs() / zoom;
Size2 size = get_size() / zoom;
Point2i from = (offset / float(snap)).floor();
Point2i len = (size / float(snap)).floor() + Vector2(1, 1);
Color grid_minor = get_theme_color(SNAME("grid_minor"));
Color grid_major = get_theme_color(SNAME("grid_major"));
for (int i = from.x; i < from.x + len.x; i++) {
Color color;
if (ABS(i) % 10 == 0) {
color = grid_major;
} else {
color = grid_minor;
}
float base_ofs = i * snap * zoom - offset.x * zoom;
draw_line(Vector2(base_ofs, 0), Vector2(base_ofs, get_size().height), color);
}
for (int i = from.y; i < from.y + len.y; i++) {
Color color;
if (ABS(i) % 10 == 0) {
color = grid_major;
} else {
color = grid_minor;
}
float base_ofs = i * snap * zoom - offset.y * zoom;
draw_line(Vector2(0, base_ofs), Vector2(get_size().width, base_ofs), color);
}
}
}
if (p_what == NOTIFICATION_RESIZED) {
_update_scroll();
top_layer->update();
minimap->update();
}
}
bool GraphEdit::_filter_input(const Point2 &p_point) {
Ref<Texture2D> port = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
for (int j = 0; j < gn->get_connection_output_count(); j++) {
Vector2 pos = gn->get_connection_output_position(j) + gn->get_position();
if (is_in_hot_zone(pos / zoom, p_point / zoom)) {
return true;
}
}
for (int j = 0; j < gn->get_connection_input_count(); j++) {
Vector2 pos = gn->get_connection_input_position(j) + gn->get_position();
if (is_in_hot_zone(pos / zoom, p_point / zoom)) {
return true;
}
}
}
return false;
}
void GraphEdit::_top_layer_input(const Ref<InputEvent> &p_ev) {
Ref<InputEventMouseButton> mb = p_ev;
if (mb.is_valid() && mb->get_button_index() == MOUSE_BUTTON_LEFT && mb->is_pressed()) {
connecting_valid = false;
Ref<Texture2D> port = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
click_pos = mb->get_position() / zoom;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
for (int j = 0; j < gn->get_connection_output_count(); j++) {
Vector2 pos = gn->get_connection_output_position(j) + gn->get_position();
if (is_in_hot_zone(pos / zoom, click_pos)) {
if (valid_left_disconnect_types.has(gn->get_connection_output_type(j))) {
//check disconnect
for (const Connection &E : connections) {
if (E.from == gn->get_name() && E.from_port == j) {
Node *to = get_node(String(E.to));
if (Object::cast_to<GraphNode>(to)) {
connecting_from = E.to;
connecting_index = E.to_port;
connecting_out = false;
connecting_type = Object::cast_to<GraphNode>(to)->get_connection_input_type(E.to_port);
connecting_color = Object::cast_to<GraphNode>(to)->get_connection_input_color(E.to_port);
connecting_target = false;
connecting_to = pos;
just_disconnected = true;
emit_signal(SNAME("disconnection_request"), E.from, E.from_port, E.to, E.to_port);
to = get_node(String(connecting_from)); //maybe it was erased
if (Object::cast_to<GraphNode>(to)) {
connecting = true;
}
return;
}
}
}
}
connecting = true;
connecting_from = gn->get_name();
connecting_index = j;
connecting_out = true;
connecting_type = gn->get_connection_output_type(j);
connecting_color = gn->get_connection_output_color(j);
connecting_target = false;
connecting_to = pos;
just_disconnected = false;
return;
}
}
for (int j = 0; j < gn->get_connection_input_count(); j++) {
Vector2 pos = gn->get_connection_input_position(j) + gn->get_position();
if (is_in_hot_zone(pos / zoom, click_pos)) {
if (right_disconnects || valid_right_disconnect_types.has(gn->get_connection_input_type(j))) {
//check disconnect
for (const Connection &E : connections) {
if (E.to == gn->get_name() && E.to_port == j) {
Node *fr = get_node(String(E.from));
if (Object::cast_to<GraphNode>(fr)) {
connecting_from = E.from;
connecting_index = E.from_port;
connecting_out = true;
connecting_type = Object::cast_to<GraphNode>(fr)->get_connection_output_type(E.from_port);
connecting_color = Object::cast_to<GraphNode>(fr)->get_connection_output_color(E.from_port);
connecting_target = false;
connecting_to = pos;
just_disconnected = true;
emit_signal(SNAME("disconnection_request"), E.from, E.from_port, E.to, E.to_port);
fr = get_node(String(connecting_from)); //maybe it was erased
if (Object::cast_to<GraphNode>(fr)) {
connecting = true;
}
return;
}
}
}
}
connecting = true;
connecting_from = gn->get_name();
connecting_index = j;
connecting_out = false;
connecting_type = gn->get_connection_input_type(j);
connecting_color = gn->get_connection_input_color(j);
connecting_target = false;
connecting_to = pos;
just_disconnected = false;
return;
}
}
}
}
Ref<InputEventMouseMotion> mm = p_ev;
if (mm.is_valid() && connecting) {
connecting_to = mm->get_position();
connecting_target = false;
top_layer->update();
minimap->update();
connecting_valid = just_disconnected || click_pos.distance_to(connecting_to / zoom) > 20.0 * zoom;
if (connecting_valid) {
Ref<Texture2D> port = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
Vector2 mpos = mm->get_position() / zoom;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
if (!connecting_out) {
for (int j = 0; j < gn->get_connection_output_count(); j++) {
Vector2 pos = gn->get_connection_output_position(j) + gn->get_position();
int type = gn->get_connection_output_type(j);
if ((type == connecting_type || valid_connection_types.has(ConnType(type, connecting_type))) && is_in_hot_zone(pos / zoom, mpos)) {
connecting_target = true;
connecting_to = pos;
connecting_target_to = gn->get_name();
connecting_target_index = j;
return;
}
}
} else {
for (int j = 0; j < gn->get_connection_input_count(); j++) {
Vector2 pos = gn->get_connection_input_position(j) + gn->get_position();
int type = gn->get_connection_input_type(j);
if ((type == connecting_type || valid_connection_types.has(ConnType(type, connecting_type))) && is_in_hot_zone(pos / zoom, mpos)) {
connecting_target = true;
connecting_to = pos;
connecting_target_to = gn->get_name();
connecting_target_index = j;
return;
}
}
}
}
}
}
if (mb.is_valid() && mb->get_button_index() == MOUSE_BUTTON_LEFT && !mb->is_pressed()) {
if (connecting_valid) {
if (connecting && connecting_target) {
String from = connecting_from;
int from_slot = connecting_index;
String to = connecting_target_to;
int to_slot = connecting_target_index;
if (!connecting_out) {
SWAP(from, to);
SWAP(from_slot, to_slot);
}
emit_signal(SNAME("connection_request"), from, from_slot, to, to_slot);
} else if (!just_disconnected) {
String from = connecting_from;
int from_slot = connecting_index;
Vector2 ofs = Vector2(mb->get_position().x, mb->get_position().y);
if (!connecting_out) {
emit_signal(SNAME("connection_from_empty"), from, from_slot, ofs);
} else {
emit_signal(SNAME("connection_to_empty"), from, from_slot, ofs);
}
}
}
connecting = false;
top_layer->update();
minimap->update();
update();
connections_layer->update();
}
}
bool GraphEdit::_check_clickable_control(Control *p_control, const Vector2 &pos) {
if (p_control->is_set_as_top_level() || !p_control->is_visible()) {
return false;
}
if (!p_control->has_point(pos) || p_control->get_mouse_filter() == MOUSE_FILTER_IGNORE) {
//test children
for (int i = 0; i < p_control->get_child_count(); i++) {
Control *subchild = Object::cast_to<Control>(p_control->get_child(i));
if (!subchild) {
continue;
}
if (_check_clickable_control(subchild, pos - subchild->get_position())) {
return true;
}
}
return false;
} else {
return true;
}
}
bool GraphEdit::is_in_hot_zone(const Vector2 &pos, const Vector2 &p_mouse_pos) {
if (!Rect2(pos.x - port_grab_distance_horizontal, pos.y - port_grab_distance_vertical, port_grab_distance_horizontal * 2, port_grab_distance_vertical * 2).has_point(p_mouse_pos)) {
return false;
}
for (int i = 0; i < get_child_count(); i++) {
Control *child = Object::cast_to<Control>(get_child(i));
if (!child) {
continue;
}
Rect2 rect = child->get_rect();
// To prevent intersections with other nodes.
rect.position *= zoom;
rect.size *= zoom;
if (rect.has_point(p_mouse_pos)) {
//check sub-controls
Vector2 subpos = p_mouse_pos - rect.position;
for (int j = 0; j < child->get_child_count(); j++) {
Control *subchild = Object::cast_to<Control>(child->get_child(j));
if (!subchild) {
continue;
}
if (_check_clickable_control(subchild, subpos - subchild->get_position())) {
return false;
}
}
}
}
return true;
}
template <class Vector2>
static _FORCE_INLINE_ Vector2 _bezier_interp(real_t t, Vector2 start, Vector2 control_1, Vector2 control_2, Vector2 end) {
/* Formula from Wikipedia article on Bezier curves. */
real_t omt = (1.0 - t);
real_t omt2 = omt * omt;
real_t omt3 = omt2 * omt;
real_t t2 = t * t;
real_t t3 = t2 * t;
return start * omt3 + control_1 * omt2 * t * 3.0 + control_2 * omt * t2 * 3.0 + end * t3;
}
void GraphEdit::_bake_segment2d(Vector<Vector2> &points, Vector<Color> &colors, float p_begin, float p_end, const Vector2 &p_a, const Vector2 &p_out, const Vector2 &p_b, const Vector2 &p_in, int p_depth, int p_min_depth, int p_max_depth, float p_tol, const Color &p_color, const Color &p_to_color, int &lines) const {
float mp = p_begin + (p_end - p_begin) * 0.5;
Vector2 beg = _bezier_interp(p_begin, p_a, p_a + p_out, p_b + p_in, p_b);
Vector2 mid = _bezier_interp(mp, p_a, p_a + p_out, p_b + p_in, p_b);
Vector2 end = _bezier_interp(p_end, p_a, p_a + p_out, p_b + p_in, p_b);
Vector2 na = (mid - beg).normalized();
Vector2 nb = (end - mid).normalized();
float dp = Math::rad2deg(Math::acos(na.dot(nb)));
if (p_depth >= p_min_depth && (dp < p_tol || p_depth >= p_max_depth)) {
points.push_back((beg + end) * 0.5);
colors.push_back(p_color.lerp(p_to_color, mp));
lines++;
} else {
_bake_segment2d(points, colors, p_begin, mp, p_a, p_out, p_b, p_in, p_depth + 1, p_min_depth, p_max_depth, p_tol, p_color, p_to_color, lines);
_bake_segment2d(points, colors, mp, p_end, p_a, p_out, p_b, p_in, p_depth + 1, p_min_depth, p_max_depth, p_tol, p_color, p_to_color, lines);
}
}
void GraphEdit::_draw_cos_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_bezier_ratio) {
//cubic bezier code
float diff = p_to.x - p_from.x;
float cp_offset;
int cp_len = get_theme_constant(SNAME("bezier_len_pos")) * p_bezier_ratio;
int cp_neg_len = get_theme_constant(SNAME("bezier_len_neg")) * p_bezier_ratio;
if (diff > 0) {
cp_offset = MIN(cp_len, diff * 0.5);
} else {
cp_offset = MAX(MIN(cp_len - diff, cp_neg_len), -diff * 0.5);
}
Vector2 c1 = Vector2(cp_offset * zoom, 0);
Vector2 c2 = Vector2(-cp_offset * zoom, 0);
int lines = 0;
Vector<Point2> points;
Vector<Color> colors;
points.push_back(p_from);
colors.push_back(p_color);
_bake_segment2d(points, colors, 0, 1, p_from, c1, p_to, c2, 0, 3, 9, 3, p_color, p_to_color, lines);
points.push_back(p_to);
colors.push_back(p_to_color);
#ifdef TOOLS_ENABLED
p_where->draw_polyline_colors(points, colors, Math::floor(p_width * EDSCALE), lines_antialiased);
#else
p_where->draw_polyline_colors(points, colors, p_width, lines_antialiased);
#endif
}
void GraphEdit::_connections_layer_draw() {
Color activity_color = get_theme_color(SNAME("activity"));
//draw connections
List<List<Connection>::Element *> to_erase;
for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
NodePath fromnp(E->get().from);
Node *from = get_node(fromnp);
if (!from) {
to_erase.push_back(E);
continue;
}
GraphNode *gfrom = Object::cast_to<GraphNode>(from);
if (!gfrom) {
to_erase.push_back(E);
continue;
}
NodePath tonp(E->get().to);
Node *to = get_node(tonp);
if (!to) {
to_erase.push_back(E);
continue;
}
GraphNode *gto = Object::cast_to<GraphNode>(to);
if (!gto) {
to_erase.push_back(E);
continue;
}
Vector2 frompos = gfrom->get_connection_output_position(E->get().from_port) + gfrom->get_position_offset() * zoom;
Color color = gfrom->get_connection_output_color(E->get().from_port);
Vector2 topos = gto->get_connection_input_position(E->get().to_port) + gto->get_position_offset() * zoom;
Color tocolor = gto->get_connection_input_color(E->get().to_port);
if (E->get().activity > 0) {
color = color.lerp(activity_color, E->get().activity);
tocolor = tocolor.lerp(activity_color, E->get().activity);
}
_draw_cos_line(connections_layer, frompos, topos, color, tocolor, lines_thickness);
}
while (to_erase.size()) {
connections.erase(to_erase.front()->get());
to_erase.pop_front();
}
}
void GraphEdit::_top_layer_draw() {
_update_scroll();
if (connecting) {
Node *fromn = get_node(connecting_from);
ERR_FAIL_COND(!fromn);
GraphNode *from = Object::cast_to<GraphNode>(fromn);
ERR_FAIL_COND(!from);
Vector2 pos;
if (connecting_out) {
pos = from->get_connection_output_position(connecting_index);
} else {
pos = from->get_connection_input_position(connecting_index);
}
pos += from->get_position();
Vector2 topos;
topos = connecting_to;
Color col = connecting_color;
if (connecting_target) {
col.r += 0.4;
col.g += 0.4;
col.b += 0.4;
}
if (!connecting_out) {
SWAP(pos, topos);
}
_draw_cos_line(top_layer, pos, topos, col, col, lines_thickness);
}
if (box_selecting) {
top_layer->draw_rect(box_selecting_rect, get_theme_color(SNAME("selection_fill")));
top_layer->draw_rect(box_selecting_rect, get_theme_color(SNAME("selection_stroke")), false);
}
}
void GraphEdit::_minimap_draw() {
if (!is_minimap_enabled()) {
return;
}
minimap->update_minimap();
// Draw the minimap background.
Rect2 minimap_rect = Rect2(Point2(), minimap->get_size());
minimap->draw_style_box(minimap->get_theme_stylebox(SNAME("bg")), minimap_rect);
Vector2 graph_offset = minimap->_get_graph_offset();
Vector2 minimap_offset = minimap->minimap_offset;
// Draw comment graph nodes.
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn || !gn->is_comment()) {
continue;
}
Vector2 node_position = minimap->_convert_from_graph_position(gn->get_position_offset() * zoom - graph_offset) + minimap_offset;
Vector2 node_size = minimap->_convert_from_graph_position(gn->get_size() * zoom);
Rect2 node_rect = Rect2(node_position, node_size);
Ref<StyleBoxFlat> sb_minimap = minimap->get_theme_stylebox(SNAME("node"))->duplicate();
// Override default values with colors provided by the GraphNode's stylebox, if possible.
Ref<StyleBoxFlat> sbf = gn->get_theme_stylebox(gn->is_selected() ? "commentfocus" : "comment");
if (sbf.is_valid()) {
Color node_color = sbf->get_bg_color();
sb_minimap->set_bg_color(node_color);
}
minimap->draw_style_box(sb_minimap, node_rect);
}
// Draw regular graph nodes.
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn || gn->is_comment()) {
continue;
}
Vector2 node_position = minimap->_convert_from_graph_position(gn->get_position_offset() * zoom - graph_offset) + minimap_offset;
Vector2 node_size = minimap->_convert_from_graph_position(gn->get_size() * zoom);
Rect2 node_rect = Rect2(node_position, node_size);
Ref<StyleBoxFlat> sb_minimap = minimap->get_theme_stylebox(SNAME("node"))->duplicate();
// Override default values with colors provided by the GraphNode's stylebox, if possible.
Ref<StyleBoxFlat> sbf = gn->get_theme_stylebox(gn->is_selected() ? "selectedframe" : "frame");
if (sbf.is_valid()) {
Color node_color = sbf->get_border_color();
sb_minimap->set_bg_color(node_color);
}
minimap->draw_style_box(sb_minimap, node_rect);
}
// Draw node connections.
Color activity_color = get_theme_color(SNAME("activity"));
for (const Connection &E : connections) {
NodePath fromnp(E.from);
Node *from = get_node(fromnp);
if (!from) {
continue;
}
GraphNode *gfrom = Object::cast_to<GraphNode>(from);
if (!gfrom) {
continue;
}
NodePath tonp(E.to);
Node *to = get_node(tonp);
if (!to) {
continue;
}
GraphNode *gto = Object::cast_to<GraphNode>(to);
if (!gto) {
continue;
}
Vector2 from_slot_position = gfrom->get_position_offset() * zoom + gfrom->get_connection_output_position(E.from_port);
Vector2 from_position = minimap->_convert_from_graph_position(from_slot_position - graph_offset) + minimap_offset;
Color from_color = gfrom->get_connection_output_color(E.from_port);
Vector2 to_slot_position = gto->get_position_offset() * zoom + gto->get_connection_input_position(E.to_port);
Vector2 to_position = minimap->_convert_from_graph_position(to_slot_position - graph_offset) + minimap_offset;
Color to_color = gto->get_connection_input_color(E.to_port);
if (E.activity > 0) {
from_color = from_color.lerp(activity_color, E.activity);
to_color = to_color.lerp(activity_color, E.activity);
}
_draw_cos_line(minimap, from_position, to_position, from_color, to_color, 1.0, 0.5);
}
// Draw the "camera" viewport.
Rect2 camera_rect = minimap->get_camera_rect();
minimap->draw_style_box(minimap->get_theme_stylebox(SNAME("camera")), camera_rect);
// Draw the resizer control.
Ref<Texture2D> resizer = minimap->get_theme_icon(SNAME("resizer"));
Color resizer_color = minimap->get_theme_color(SNAME("resizer_color"));
minimap->draw_texture(resizer, Point2(), resizer_color);
}
void GraphEdit::set_selected(Node *p_child) {
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
gn->set_selected(gn == p_child);
}
}
void GraphEdit::_gui_input(const Ref<InputEvent> &p_ev) {
ERR_FAIL_COND(p_ev.is_null());
Ref<InputEventMouseMotion> mm = p_ev;
if (mm.is_valid() && (mm->get_button_mask() & MOUSE_BUTTON_MASK_MIDDLE || (mm->get_button_mask() & MOUSE_BUTTON_MASK_LEFT && Input::get_singleton()->is_key_pressed(KEY_SPACE)))) {
Vector2i relative = Input::get_singleton()->warp_mouse_motion(mm, get_global_rect());
h_scroll->set_value(h_scroll->get_value() - relative.x);
v_scroll->set_value(v_scroll->get_value() - relative.y);
}
if (mm.is_valid() && dragging) {
if (!moving_selection) {
emit_signal(SNAME("begin_node_move"));
moving_selection = true;
}
just_selected = true;
drag_accum += mm->get_relative();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (gn && gn->is_selected()) {
Vector2 pos = (gn->get_drag_from() * zoom + drag_accum) / zoom;
// Snapping can be toggled temporarily by holding down Ctrl.
// This is done here as to not toggle the grid when holding down Ctrl.
if (is_using_snap() ^ Input::get_singleton()->is_key_pressed(KEY_CTRL)) {
const int snap = get_snap();
pos = pos.snapped(Vector2(snap, snap));
}
gn->set_position_offset(pos);
}
}
}
if (mm.is_valid() && box_selecting) {
box_selecting_to = mm->get_position();
box_selecting_rect = Rect2(MIN(box_selecting_from.x, box_selecting_to.x),
MIN(box_selecting_from.y, box_selecting_to.y),
ABS(box_selecting_from.x - box_selecting_to.x),
ABS(box_selecting_from.y - box_selecting_to.y));
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
Rect2 r = gn->get_rect();
r.size *= zoom;
bool in_box = r.intersects(box_selecting_rect);
if (in_box) {
if (!gn->is_selected() && box_selection_mode_additive) {
emit_signal(SNAME("node_selected"), gn);
} else if (gn->is_selected() && !box_selection_mode_additive) {
emit_signal(SNAME("node_deselected"), gn);
}
gn->set_selected(box_selection_mode_additive);
} else {
bool select = (previous_selected.find(gn) != nullptr);
if (gn->is_selected() && !select) {
emit_signal(SNAME("node_deselected"), gn);
} else if (!gn->is_selected() && select) {
emit_signal(SNAME("node_selected"), gn);
}
gn->set_selected(select);
}
}
top_layer->update();
minimap->update();
}
Ref<InputEventMouseButton> b = p_ev;
if (b.is_valid()) {
if (b->get_button_index() == MOUSE_BUTTON_RIGHT && b->is_pressed()) {
if (box_selecting) {
box_selecting = false;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
bool select = (previous_selected.find(gn) != nullptr);
if (gn->is_selected() && !select) {
emit_signal(SNAME("node_deselected"), gn);
} else if (!gn->is_selected() && select) {
emit_signal(SNAME("node_selected"), gn);
}
gn->set_selected(select);
}
top_layer->update();
minimap->update();
} else {
if (connecting) {
connecting = false;
top_layer->update();
minimap->update();
} else {
emit_signal(SNAME("popup_request"), b->get_global_position());
}
}
}
if (b->get_button_index() == MOUSE_BUTTON_LEFT && !b->is_pressed() && dragging) {
if (!just_selected && drag_accum == Vector2() && Input::get_singleton()->is_key_pressed(KEY_CTRL)) {
//deselect current node
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (gn) {
Rect2 r = gn->get_rect();
r.size *= zoom;
if (r.has_point(b->get_position())) {
emit_signal(SNAME("node_deselected"), gn);
gn->set_selected(false);
}
}
}
}
if (drag_accum != Vector2()) {
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (gn && gn->is_selected()) {
gn->set_drag(false);
}
}
}
if (moving_selection) {
emit_signal(SNAME("end_node_move"));
moving_selection = false;
}
dragging = false;
top_layer->update();
minimap->update();
update();
connections_layer->update();
}
if (b->get_button_index() == MOUSE_BUTTON_LEFT && b->is_pressed()) {
GraphNode *gn = nullptr;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn_selected = Object::cast_to<GraphNode>(get_child(i));
if (gn_selected) {
if (gn_selected->is_resizing()) {
continue;
}
if (gn_selected->has_point((b->get_position() - gn_selected->get_position()) / zoom)) {
gn = gn_selected;
break;
}
}
}
if (gn) {
if (_filter_input(b->get_position())) {
return;
}
dragging = true;
drag_accum = Vector2();
just_selected = !gn->is_selected();
if (!gn->is_selected() && !Input::get_singleton()->is_key_pressed(KEY_CTRL)) {
for (int i = 0; i < get_child_count(); i++) {
GraphNode *o_gn = Object::cast_to<GraphNode>(get_child(i));
if (o_gn) {
if (o_gn == gn) {
o_gn->set_selected(true);
} else {
if (o_gn->is_selected()) {
emit_signal(SNAME("node_deselected"), o_gn);
}
o_gn->set_selected(false);
}
}
}
}
gn->set_selected(true);
for (int i = 0; i < get_child_count(); i++) {
GraphNode *o_gn = Object::cast_to<GraphNode>(get_child(i));
if (!o_gn) {
continue;
}
if (o_gn->is_selected()) {
o_gn->set_drag(true);
}
}
} else {
if (_filter_input(b->get_position())) {
return;
}
if (Input::get_singleton()->is_key_pressed(KEY_SPACE)) {
return;
}
box_selecting = true;
box_selecting_from = b->get_position();
if (b->is_ctrl_pressed()) {
box_selection_mode_additive = true;
previous_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn2 = Object::cast_to<GraphNode>(get_child(i));
if (!gn2 || !gn2->is_selected()) {
continue;
}
previous_selected.push_back(gn2);
}
} else if (b->is_shift_pressed()) {
box_selection_mode_additive = false;
previous_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn2 = Object::cast_to<GraphNode>(get_child(i));
if (!gn2 || !gn2->is_selected()) {
continue;
}
previous_selected.push_back(gn2);
}
} else {
box_selection_mode_additive = true;
previous_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn2 = Object::cast_to<GraphNode>(get_child(i));
if (!gn2) {
continue;
}
if (gn2->is_selected()) {
emit_signal(SNAME("node_deselected"), gn2);
}
gn2->set_selected(false);
}
}
}
}
if (b->get_button_index() == MOUSE_BUTTON_LEFT && !b->is_pressed() && box_selecting) {
box_selecting = false;
box_selecting_rect = Rect2();
previous_selected.clear();
top_layer->update();
minimap->update();
}
int scroll_direction = (b->get_button_index() == MOUSE_BUTTON_WHEEL_DOWN) - (b->get_button_index() == MOUSE_BUTTON_WHEEL_UP);
if (scroll_direction != 0) {
if (b->is_ctrl_pressed()) {
if (b->is_shift_pressed()) {
// Horizontal scrolling.
h_scroll->set_value(h_scroll->get_value() + (h_scroll->get_page() * b->get_factor() / 8) * scroll_direction);
} else {
// Vertical scrolling.
v_scroll->set_value(v_scroll->get_value() + (v_scroll->get_page() * b->get_factor() / 8) * scroll_direction);
}
} else {
// Zooming.
set_zoom_custom(scroll_direction < 0 ? zoom * zoom_step : zoom / zoom_step, b->get_position());
}
}
}
if (p_ev->is_pressed()) {
if (p_ev->is_action("ui_graph_duplicate")) {
emit_signal(SNAME("duplicate_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_copy")) {
emit_signal(SNAME("copy_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_paste")) {
emit_signal(SNAME("paste_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_graph_delete")) {
emit_signal(SNAME("delete_nodes_request"));
accept_event();
}
}
Ref<InputEventMagnifyGesture> magnify_gesture = p_ev;
if (magnify_gesture.is_valid()) {
set_zoom_custom(zoom * magnify_gesture->get_factor(), magnify_gesture->get_position());
}
Ref<InputEventPanGesture> pan_gesture = p_ev;
if (pan_gesture.is_valid()) {
h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * pan_gesture->get_delta().x / 8);
v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() * pan_gesture->get_delta().y / 8);
}
}
void GraphEdit::set_connection_activity(const StringName &p_from, int p_from_port, const StringName &p_to, int p_to_port, float p_activity) {
for (Connection &E : connections) {
if (E.from == p_from && E.from_port == p_from_port && E.to == p_to && E.to_port == p_to_port) {
if (Math::is_equal_approx(E.activity, p_activity)) {
//update only if changed
top_layer->update();
minimap->update();
connections_layer->update();
}
E.activity = p_activity;
return;
}
}
}
void GraphEdit::clear_connections() {
connections.clear();
minimap->update();
update();
connections_layer->update();
}
void GraphEdit::set_zoom(float p_zoom) {
set_zoom_custom(p_zoom, get_size() / 2);
}
void GraphEdit::set_zoom_custom(float p_zoom, const Vector2 &p_center) {
p_zoom = CLAMP(p_zoom, zoom_min, zoom_max);
if (zoom == p_zoom) {
return;
}
Vector2 sbofs = (Vector2(h_scroll->get_value(), v_scroll->get_value()) + p_center) / zoom;
zoom = p_zoom;
top_layer->update();
zoom_minus->set_disabled(zoom == zoom_min);
zoom_plus->set_disabled(zoom == zoom_max);
_update_scroll();
minimap->update();
connections_layer->update();
if (is_visible_in_tree()) {
Vector2 ofs = sbofs * zoom - p_center;
h_scroll->set_value(ofs.x);
v_scroll->set_value(ofs.y);
}
_update_zoom_label();
update();
}
float GraphEdit::get_zoom() const {
return zoom;
}
void GraphEdit::set_zoom_step(float p_zoom_step) {
p_zoom_step = abs(p_zoom_step);
if (zoom_step == p_zoom_step) {
return;
}
zoom_step = p_zoom_step;
}
float GraphEdit::get_zoom_step() const {
return zoom_step;
}
void GraphEdit::set_zoom_min(float p_zoom_min) {
ERR_FAIL_COND_MSG(p_zoom_min > zoom_max, "Cannot set min zoom level greater than max zoom level.");
if (zoom_min == p_zoom_min) {
return;
}
zoom_min = p_zoom_min;
set_zoom(zoom);
}
float GraphEdit::get_zoom_min() const {
return zoom_min;
}
void GraphEdit::set_zoom_max(float p_zoom_max) {
ERR_FAIL_COND_MSG(p_zoom_max < zoom_min, "Cannot set max zoom level lesser than min zoom level.");
if (zoom_max == p_zoom_max) {
return;
}
zoom_max = p_zoom_max;
set_zoom(zoom);
}
float GraphEdit::get_zoom_max() const {
return zoom_max;
}
void GraphEdit::set_show_zoom_label(bool p_enable) {
if (zoom_label->is_visible() == p_enable) {
return;
}
zoom_label->set_visible(p_enable);
}
bool GraphEdit::is_showing_zoom_label() const {
return zoom_label->is_visible();
}
void GraphEdit::set_right_disconnects(bool p_enable) {
right_disconnects = p_enable;
}
bool GraphEdit::is_right_disconnects_enabled() const {
return right_disconnects;
}
void GraphEdit::add_valid_right_disconnect_type(int p_type) {
valid_right_disconnect_types.insert(p_type);
}
void GraphEdit::remove_valid_right_disconnect_type(int p_type) {
valid_right_disconnect_types.erase(p_type);
}
void GraphEdit::add_valid_left_disconnect_type(int p_type) {
valid_left_disconnect_types.insert(p_type);
}
void GraphEdit::remove_valid_left_disconnect_type(int p_type) {
valid_left_disconnect_types.erase(p_type);
}
Array GraphEdit::_get_connection_list() const {
List<Connection> conns;
get_connection_list(&conns);
Array arr;
for (const Connection &E : conns) {
Dictionary d;
d["from"] = E.from;
d["from_port"] = E.from_port;
d["to"] = E.to;
d["to_port"] = E.to_port;
arr.push_back(d);
}
return arr;
}
void GraphEdit::_zoom_minus() {
set_zoom(zoom / zoom_step);
}
void GraphEdit::_zoom_reset() {
set_zoom(1);
}
void GraphEdit::_zoom_plus() {
set_zoom(zoom * zoom_step);
}
void GraphEdit::_update_zoom_label() {
int zoom_percent = static_cast<int>(Math::round(zoom * 100));
String zoom_text = itos(zoom_percent) + "%";
zoom_label->set_text(zoom_text);
}
void GraphEdit::add_valid_connection_type(int p_type, int p_with_type) {
ConnType ct;
ct.type_a = p_type;
ct.type_b = p_with_type;
valid_connection_types.insert(ct);
}
void GraphEdit::remove_valid_connection_type(int p_type, int p_with_type) {
ConnType ct;
ct.type_a = p_type;
ct.type_b = p_with_type;
valid_connection_types.erase(ct);
}
bool GraphEdit::is_valid_connection_type(int p_type, int p_with_type) const {
ConnType ct;
ct.type_a = p_type;
ct.type_b = p_with_type;
return valid_connection_types.has(ct);
}
void GraphEdit::set_use_snap(bool p_enable) {
snap_button->set_pressed(p_enable);
update();
}
bool GraphEdit::is_using_snap() const {
return snap_button->is_pressed();
}
int GraphEdit::get_snap() const {
return snap_amount->get_value();
}
void GraphEdit::set_snap(int p_snap) {
ERR_FAIL_COND(p_snap < 5);
snap_amount->set_value(p_snap);
update();
}
void GraphEdit::_snap_toggled() {
update();
}
void GraphEdit::_snap_value_changed(double) {
update();
}
void GraphEdit::set_minimap_size(Vector2 p_size) {
minimap->set_size(p_size);
Vector2 minimap_size = minimap->get_size(); // The size might've been adjusted by the minimum size.
minimap->set_anchors_preset(Control::PRESET_BOTTOM_RIGHT);
minimap->set_offset(Side::SIDE_LEFT, -minimap_size.x - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_TOP, -minimap_size.y - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
minimap->update();
}
Vector2 GraphEdit::get_minimap_size() const {
return minimap->get_size();
}
void GraphEdit::set_minimap_opacity(float p_opacity) {
minimap->set_modulate(Color(1, 1, 1, p_opacity));
minimap->update();
}
float GraphEdit::get_minimap_opacity() const {
Color minimap_modulate = minimap->get_modulate();
return minimap_modulate.a;
}
void GraphEdit::set_minimap_enabled(bool p_enable) {
minimap_button->set_pressed(p_enable);
minimap->update();
}
bool GraphEdit::is_minimap_enabled() const {
return minimap_button->is_pressed();
}
void GraphEdit::_minimap_toggled() {
if (is_minimap_enabled()) {
minimap->set_visible(true);
minimap->update();
} else {
minimap->set_visible(false);
}
}
void GraphEdit::set_connection_lines_thickness(float p_thickness) {
lines_thickness = p_thickness;
update();
}
float GraphEdit::get_connection_lines_thickness() const {
return lines_thickness;
}
void GraphEdit::set_connection_lines_antialiased(bool p_antialiased) {
lines_antialiased = p_antialiased;
update();
}
bool GraphEdit::is_connection_lines_antialiased() const {
return lines_antialiased;
}
HBoxContainer *GraphEdit::get_zoom_hbox() {
return zoom_hb;
}
int GraphEdit::_set_operations(SET_OPERATIONS p_operation, Set<StringName> &r_u, const Set<StringName> &r_v) {
switch (p_operation) {
case GraphEdit::IS_EQUAL: {
for (Set<StringName>::Element *E = r_u.front(); E; E = E->next()) {
if (!r_v.has(E->get()))
return 0;
}
return r_u.size() == r_v.size();
} break;
case GraphEdit::IS_SUBSET: {
if (r_u.size() == r_v.size() && !r_u.size()) {
return 1;
}
for (Set<StringName>::Element *E = r_u.front(); E; E = E->next()) {
if (!r_v.has(E->get()))
return 0;
}
return 1;
} break;
case GraphEdit::DIFFERENCE: {
for (Set<StringName>::Element *E = r_u.front(); E; E = E->next()) {
if (r_v.has(E->get())) {
r_u.erase(E->get());
}
}
return r_u.size();
} break;
case GraphEdit::UNION: {
for (Set<StringName>::Element *E = r_v.front(); E; E = E->next()) {
if (!r_u.has(E->get())) {
r_u.insert(E->get());
}
}
return r_v.size();
} break;
default:
break;
}
return -1;
}
HashMap<int, Vector<StringName>> GraphEdit::_layering(const Set<StringName> &r_selected_nodes, const HashMap<StringName, Set<StringName>> &r_upper_neighbours) {
HashMap<int, Vector<StringName>> l;
Set<StringName> p = r_selected_nodes, q = r_selected_nodes, u, z;
int current_layer = 0;
bool selected = false;
while (!_set_operations(GraphEdit::IS_EQUAL, q, u)) {
_set_operations(GraphEdit::DIFFERENCE, p, u);
for (const Set<StringName>::Element *E = p.front(); E; E = E->next()) {
Set<StringName> n = r_upper_neighbours[E->get()];
if (_set_operations(GraphEdit::IS_SUBSET, n, z)) {
Vector<StringName> t;
t.push_back(E->get());
if (!l.has(current_layer)) {
l.set(current_layer, Vector<StringName>{});
}
selected = true;
t.append_array(l[current_layer]);
l.set(current_layer, t);
Set<StringName> V;
V.insert(E->get());
_set_operations(GraphEdit::UNION, u, V);
}
}
if (!selected) {
current_layer++;
_set_operations(GraphEdit::UNION, z, u);
}
selected = false;
}
return l;
}
Vector<StringName> GraphEdit::_split(const Vector<StringName> &r_layer, const HashMap<StringName, Dictionary> &r_crossings) {
if (!r_layer.size()) {
return Vector<StringName>();
}
StringName p = r_layer[Math::random(0, r_layer.size() - 1)];
Vector<StringName> left;
Vector<StringName> right;
for (int i = 0; i < r_layer.size(); i++) {
if (p != r_layer[i]) {
StringName q = r_layer[i];
int cross_pq = r_crossings[p][q];
int cross_qp = r_crossings[q][p];
if (cross_pq > cross_qp) {
left.push_back(q);
} else {
right.push_back(q);
}
}
}
left.push_back(p);
left.append_array(right);
return left;
}
void GraphEdit::_horizontal_alignment(Dictionary &r_root, Dictionary &r_align, const HashMap<int, Vector<StringName>> &r_layers, const HashMap<StringName, Set<StringName>> &r_upper_neighbours, const Set<StringName> &r_selected_nodes) {
for (const Set<StringName>::Element *E = r_selected_nodes.front(); E; E = E->next()) {
r_root[E->get()] = E->get();
r_align[E->get()] = E->get();
}
if (r_layers.size() == 1) {
return;
}
for (unsigned int i = 1; i < r_layers.size(); i++) {
Vector<StringName> lower_layer = r_layers[i];
Vector<StringName> upper_layer = r_layers[i - 1];
int r = -1;
for (int j = 0; j < lower_layer.size(); j++) {
Vector<Pair<int, StringName>> up;
StringName current_node = lower_layer[j];
for (int k = 0; k < upper_layer.size(); k++) {
StringName adjacent_neighbour = upper_layer[k];
if (r_upper_neighbours[current_node].has(adjacent_neighbour)) {
up.push_back(Pair<int, StringName>(k, adjacent_neighbour));
}
}
int start = up.size() / 2;
int end = up.size() % 2 ? start : start + 1;
for (int p = start; p <= end; p++) {
StringName Align = r_align[current_node];
if (Align == current_node && r < up[p].first) {
r_align[up[p].second] = lower_layer[j];
r_root[current_node] = r_root[up[p].second];
r_align[current_node] = r_root[up[p].second];
r = up[p].first;
}
}
}
}
}
void GraphEdit::_crossing_minimisation(HashMap<int, Vector<StringName>> &r_layers, const HashMap<StringName, Set<StringName>> &r_upper_neighbours) {
if (r_layers.size() == 1) {
return;
}
for (unsigned int i = 1; i < r_layers.size(); i++) {
Vector<StringName> upper_layer = r_layers[i - 1];
Vector<StringName> lower_layer = r_layers[i];
HashMap<StringName, Dictionary> c;
for (int j = 0; j < lower_layer.size(); j++) {
StringName p = lower_layer[j];
Dictionary d;
for (int k = 0; k < lower_layer.size(); k++) {
unsigned int crossings = 0;
StringName q = lower_layer[k];
if (j != k) {
for (int h = 1; h < upper_layer.size(); h++) {
if (r_upper_neighbours[p].has(upper_layer[h])) {
for (int g = 0; g < h; g++) {
if (r_upper_neighbours[q].has(upper_layer[g])) {
crossings++;
}
}
}
}
}
d[q] = crossings;
}
c.set(p, d);
}
r_layers.set(i, _split(lower_layer, c));
}
}
void GraphEdit::_calculate_inner_shifts(Dictionary &r_inner_shifts, const Dictionary &r_root, const Dictionary &r_node_names, const Dictionary &r_align, const Set<StringName> &r_block_heads, const HashMap<StringName, Pair<int, int>> &r_port_info) {
for (const Set<StringName>::Element *E = r_block_heads.front(); E; E = E->next()) {
real_t left = 0;
StringName u = E->get();
StringName v = r_align[u];
while (u != v && (StringName)r_root[u] != v) {
String _connection = String(u) + " " + String(v);
GraphNode *gfrom = Object::cast_to<GraphNode>(r_node_names[u]);
GraphNode *gto = Object::cast_to<GraphNode>(r_node_names[v]);
Pair<int, int> ports = r_port_info[_connection];
int pfrom = ports.first;
int pto = ports.second;
Vector2 frompos = gfrom->get_connection_output_position(pfrom);
Vector2 topos = gto->get_connection_input_position(pto);
real_t s = (real_t)r_inner_shifts[u] + (frompos.y - topos.y) / zoom;
r_inner_shifts[v] = s;
left = MIN(left, s);
u = v;
v = (StringName)r_align[v];
}
u = E->get();
do {
r_inner_shifts[u] = (real_t)r_inner_shifts[u] - left;
u = (StringName)r_align[u];
} while (u != E->get());
}
}
float GraphEdit::_calculate_threshold(StringName p_v, StringName p_w, const Dictionary &r_node_names, const HashMap<int, Vector<StringName>> &r_layers, const Dictionary &r_root, const Dictionary &r_align, const Dictionary &r_inner_shift, real_t p_current_threshold, const HashMap<StringName, Vector2> &r_node_positions) {
#define MAX_ORDER 2147483647
#define ORDER(node, layers) \
for (unsigned int i = 0; i < layers.size(); i++) { \
int index = layers[i].find(node); \
if (index > 0) { \
order = index; \
break; \
} \
order = MAX_ORDER; \
}
int order = MAX_ORDER;
float threshold = p_current_threshold;
if (p_v == p_w) {
int min_order = MAX_ORDER;
Connection incoming;
for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
if (E->get().to == p_w) {
ORDER(E->get().from, r_layers);
if (min_order > order) {
min_order = order;
incoming = E->get();
}
}
}
if (incoming.from != StringName()) {
GraphNode *gfrom = Object::cast_to<GraphNode>(r_node_names[incoming.from]);
GraphNode *gto = Object::cast_to<GraphNode>(r_node_names[p_w]);
Vector2 frompos = gfrom->get_connection_output_position(incoming.from_port);
Vector2 topos = gto->get_connection_input_position(incoming.to_port);
//If connected block node is selected, calculate thershold or add current block to list
if (gfrom->is_selected()) {
Vector2 connected_block_pos = r_node_positions[r_root[incoming.from]];
if (connected_block_pos.y != FLT_MAX) {
//Connected block is placed. Calculate threshold
threshold = connected_block_pos.y + (real_t)r_inner_shift[incoming.from] - (real_t)r_inner_shift[p_w] + frompos.y - topos.y;
}
}
}
}
if (threshold == FLT_MIN && (StringName)r_align[p_w] == p_v) {
//This time, pick an outgoing edge and repeat as above!
int min_order = MAX_ORDER;
Connection outgoing;
for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
if (E->get().from == p_w) {
ORDER(E->get().to, r_layers);
if (min_order > order) {
min_order = order;
outgoing = E->get();
}
}
}
if (outgoing.to != StringName()) {
GraphNode *gfrom = Object::cast_to<GraphNode>(r_node_names[p_w]);
GraphNode *gto = Object::cast_to<GraphNode>(r_node_names[outgoing.to]);
Vector2 frompos = gfrom->get_connection_output_position(outgoing.from_port);
Vector2 topos = gto->get_connection_input_position(outgoing.to_port);
//If connected block node is selected, calculate thershold or add current block to list
if (gto->is_selected()) {
Vector2 connected_block_pos = r_node_positions[r_root[outgoing.to]];
if (connected_block_pos.y != FLT_MAX) {
//Connected block is placed. Calculate threshold
threshold = connected_block_pos.y + (real_t)r_inner_shift[outgoing.to] - (real_t)r_inner_shift[p_w] + frompos.y - topos.y;
}
}
}
}
#undef MAX_ORDER
#undef ORDER
return threshold;
}
void GraphEdit::_place_block(StringName p_v, float p_delta, const HashMap<int, Vector<StringName>> &r_layers, const Dictionary &r_root, const Dictionary &r_align, const Dictionary &r_node_name, const Dictionary &r_inner_shift, Dictionary &r_sink, Dictionary &r_shift, HashMap<StringName, Vector2> &r_node_positions) {
#define PRED(node, layers) \
for (unsigned int i = 0; i < layers.size(); i++) { \
int index = layers[i].find(node); \
if (index > 0) { \
predecessor = layers[i][index - 1]; \
break; \
} \
predecessor = StringName(); \
}
StringName predecessor;
StringName successor;
Vector2 pos = r_node_positions[p_v];
if (pos.y == FLT_MAX) {
pos.y = 0;
bool initial = false;
StringName w = p_v;
real_t threshold = FLT_MIN;
do {
PRED(w, r_layers);
if (predecessor != StringName()) {
StringName u = r_root[predecessor];
_place_block(u, p_delta, r_layers, r_root, r_align, r_node_name, r_inner_shift, r_sink, r_shift, r_node_positions);
threshold = _calculate_threshold(p_v, w, r_node_name, r_layers, r_root, r_align, r_inner_shift, threshold, r_node_positions);
if ((StringName)r_sink[p_v] == p_v) {
r_sink[p_v] = r_sink[u];
}
Vector2 predecessor_root_pos = r_node_positions[u];
Vector2 predecessor_node_size = Object::cast_to<GraphNode>(r_node_name[predecessor])->get_size();
if (r_sink[p_v] != r_sink[u]) {
real_t sc = pos.y + (real_t)r_inner_shift[w] - predecessor_root_pos.y - (real_t)r_inner_shift[predecessor] - predecessor_node_size.y - p_delta;
r_shift[r_sink[u]] = MIN(sc, (real_t)r_shift[r_sink[u]]);
} else {
real_t sb = predecessor_root_pos.y + (real_t)r_inner_shift[predecessor] + predecessor_node_size.y - (real_t)r_inner_shift[w] + p_delta;
sb = MAX(sb, threshold);
if (initial) {
pos.y = sb;
} else {
pos.y = MAX(pos.y, sb);
}
initial = false;
}
}
threshold = _calculate_threshold(p_v, w, r_node_name, r_layers, r_root, r_align, r_inner_shift, threshold, r_node_positions);
w = r_align[w];
} while (w != p_v);
r_node_positions.set(p_v, pos);
}
#undef PRED
}
void GraphEdit::arrange_nodes() {
if (!arranging_graph) {
arranging_graph = true;
} else {
return;
}
Dictionary node_names;
Set<StringName> selected_nodes;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
node_names[gn->get_name()] = gn;
}
HashMap<StringName, Set<StringName>> upper_neighbours;
HashMap<StringName, Pair<int, int>> port_info;
Vector2 origin(FLT_MAX, FLT_MAX);
float gap_v = 100.0f;
float gap_h = 100.0f;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
if (gn->is_selected()) {
selected_nodes.insert(gn->get_name());
origin = origin < gn->get_position_offset() ? origin : gn->get_position_offset();
Set<StringName> s;
for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
GraphNode *p_from = Object::cast_to<GraphNode>(node_names[E->get().from]);
if (E->get().to == gn->get_name() && p_from->is_selected()) {
if (!s.has(p_from->get_name())) {
s.insert(p_from->get_name());
}
String s_connection = String(p_from->get_name()) + " " + String(E->get().to);
StringName _connection(s_connection);
Pair<int, int> ports(E->get().from_port, E->get().to_port);
if (port_info.has(_connection)) {
Pair<int, int> p_ports = port_info[_connection];
if (p_ports.first < ports.first) {
ports = p_ports;
}
}
port_info.set(_connection, ports);
}
}
upper_neighbours.set(gn->get_name(), s);
}
}
HashMap<int, Vector<StringName>> layers = _layering(selected_nodes, upper_neighbours);
_crossing_minimisation(layers, upper_neighbours);
Dictionary root, align, sink, shift;
_horizontal_alignment(root, align, layers, upper_neighbours, selected_nodes);
HashMap<StringName, Vector2> new_positions;
Vector2 default_position(FLT_MAX, FLT_MAX);
Dictionary inner_shift;
Set<StringName> block_heads;
for (const Set<StringName>::Element *E = selected_nodes.front(); E; E = E->next()) {
inner_shift[E->get()] = 0.0f;
sink[E->get()] = E->get();
shift[E->get()] = FLT_MAX;
new_positions.set(E->get(), default_position);
if ((StringName)root[E->get()] == E->get()) {
block_heads.insert(E->get());
}
}
_calculate_inner_shifts(inner_shift, root, node_names, align, block_heads, port_info);
for (const Set<StringName>::Element *E = block_heads.front(); E; E = E->next()) {
_place_block(E->get(), gap_v, layers, root, align, node_names, inner_shift, sink, shift, new_positions);
}
for (const Set<StringName>::Element *E = block_heads.front(); E; E = E->next()) {
StringName u = E->get();
StringName prev = u;
float start_from = origin.y + new_positions[E->get()].y;
do {
Vector2 cal_pos;
cal_pos.y = start_from + (real_t)inner_shift[u];
new_positions.set(u, cal_pos);
prev = u;
u = align[u];
} while (u != E->get());
}
//Compute horizontal co-ordinates individually for layers to get uniform gap
float start_from = origin.x;
float largest_node_size = 0.0f;
for (unsigned int i = 0; i < layers.size(); i++) {
Vector<StringName> layer = layers[i];
for (int j = 0; j < layer.size(); j++) {
float current_node_size = Object::cast_to<GraphNode>(node_names[layer[j]])->get_size().x;
largest_node_size = MAX(largest_node_size, current_node_size);
}
for (int j = 0; j < layer.size(); j++) {
float current_node_size = Object::cast_to<GraphNode>(node_names[layer[j]])->get_size().x;
Vector2 cal_pos = new_positions[layer[j]];
if (current_node_size == largest_node_size) {
cal_pos.x = start_from;
} else {
float current_node_start_pos;
if (current_node_size >= largest_node_size / 2) {
current_node_start_pos = start_from;
} else {
current_node_start_pos = start_from + largest_node_size - current_node_size;
}
cal_pos.x = current_node_start_pos;
}
new_positions.set(layer[j], cal_pos);
}
start_from += largest_node_size + gap_h;
largest_node_size = 0.0f;
}
emit_signal("begin_node_move");
for (const Set<StringName>::Element *E = selected_nodes.front(); E; E = E->next()) {
GraphNode *gn = Object::cast_to<GraphNode>(node_names[E->get()]);
gn->set_drag(true);
Vector2 pos = (new_positions[E->get()]);
if (is_using_snap()) {
const int snap = get_snap();
pos = pos.snapped(Vector2(snap, snap));
}
gn->set_position_offset(pos);
gn->set_drag(false);
}
emit_signal("end_node_move");
arranging_graph = false;
}
void GraphEdit::_bind_methods() {
ClassDB::bind_method(D_METHOD("connect_node", "from", "from_port", "to", "to_port"), &GraphEdit::connect_node);
ClassDB::bind_method(D_METHOD("is_node_connected", "from", "from_port", "to", "to_port"), &GraphEdit::is_node_connected);
ClassDB::bind_method(D_METHOD("disconnect_node", "from", "from_port", "to", "to_port"), &GraphEdit::disconnect_node);
ClassDB::bind_method(D_METHOD("set_connection_activity", "from", "from_port", "to", "to_port", "amount"), &GraphEdit::set_connection_activity);
ClassDB::bind_method(D_METHOD("get_connection_list"), &GraphEdit::_get_connection_list);
ClassDB::bind_method(D_METHOD("clear_connections"), &GraphEdit::clear_connections);
ClassDB::bind_method(D_METHOD("get_scroll_ofs"), &GraphEdit::get_scroll_ofs);
ClassDB::bind_method(D_METHOD("set_scroll_ofs", "ofs"), &GraphEdit::set_scroll_ofs);
ClassDB::bind_method(D_METHOD("add_valid_right_disconnect_type", "type"), &GraphEdit::add_valid_right_disconnect_type);
ClassDB::bind_method(D_METHOD("remove_valid_right_disconnect_type", "type"), &GraphEdit::remove_valid_right_disconnect_type);
ClassDB::bind_method(D_METHOD("add_valid_left_disconnect_type", "type"), &GraphEdit::add_valid_left_disconnect_type);
ClassDB::bind_method(D_METHOD("remove_valid_left_disconnect_type", "type"), &GraphEdit::remove_valid_left_disconnect_type);
ClassDB::bind_method(D_METHOD("add_valid_connection_type", "from_type", "to_type"), &GraphEdit::add_valid_connection_type);
ClassDB::bind_method(D_METHOD("remove_valid_connection_type", "from_type", "to_type"), &GraphEdit::remove_valid_connection_type);
ClassDB::bind_method(D_METHOD("is_valid_connection_type", "from_type", "to_type"), &GraphEdit::is_valid_connection_type);
ClassDB::bind_method(D_METHOD("set_zoom", "zoom"), &GraphEdit::set_zoom);
ClassDB::bind_method(D_METHOD("get_zoom"), &GraphEdit::get_zoom);
ClassDB::bind_method(D_METHOD("set_zoom_min", "zoom_min"), &GraphEdit::set_zoom_min);
ClassDB::bind_method(D_METHOD("get_zoom_min"), &GraphEdit::get_zoom_min);
ClassDB::bind_method(D_METHOD("set_zoom_max", "zoom_max"), &GraphEdit::set_zoom_max);
ClassDB::bind_method(D_METHOD("get_zoom_max"), &GraphEdit::get_zoom_max);
ClassDB::bind_method(D_METHOD("set_zoom_step", "zoom_step"), &GraphEdit::set_zoom_step);
ClassDB::bind_method(D_METHOD("get_zoom_step"), &GraphEdit::get_zoom_step);
ClassDB::bind_method(D_METHOD("set_show_zoom_label", "enable"), &GraphEdit::set_show_zoom_label);
ClassDB::bind_method(D_METHOD("is_showing_zoom_label"), &GraphEdit::is_showing_zoom_label);
ClassDB::bind_method(D_METHOD("set_snap", "pixels"), &GraphEdit::set_snap);
ClassDB::bind_method(D_METHOD("get_snap"), &GraphEdit::get_snap);
ClassDB::bind_method(D_METHOD("set_use_snap", "enable"), &GraphEdit::set_use_snap);
ClassDB::bind_method(D_METHOD("is_using_snap"), &GraphEdit::is_using_snap);
ClassDB::bind_method(D_METHOD("set_connection_lines_thickness", "pixels"), &GraphEdit::set_connection_lines_thickness);
ClassDB::bind_method(D_METHOD("get_connection_lines_thickness"), &GraphEdit::get_connection_lines_thickness);
ClassDB::bind_method(D_METHOD("set_connection_lines_antialiased", "pixels"), &GraphEdit::set_connection_lines_antialiased);
ClassDB::bind_method(D_METHOD("is_connection_lines_antialiased"), &GraphEdit::is_connection_lines_antialiased);
ClassDB::bind_method(D_METHOD("set_minimap_size", "size"), &GraphEdit::set_minimap_size);
ClassDB::bind_method(D_METHOD("get_minimap_size"), &GraphEdit::get_minimap_size);
ClassDB::bind_method(D_METHOD("set_minimap_opacity", "opacity"), &GraphEdit::set_minimap_opacity);
ClassDB::bind_method(D_METHOD("get_minimap_opacity"), &GraphEdit::get_minimap_opacity);
ClassDB::bind_method(D_METHOD("set_minimap_enabled", "enable"), &GraphEdit::set_minimap_enabled);
ClassDB::bind_method(D_METHOD("is_minimap_enabled"), &GraphEdit::is_minimap_enabled);
ClassDB::bind_method(D_METHOD("set_right_disconnects", "enable"), &GraphEdit::set_right_disconnects);
ClassDB::bind_method(D_METHOD("is_right_disconnects_enabled"), &GraphEdit::is_right_disconnects_enabled);
ClassDB::bind_method(D_METHOD("_gui_input"), &GraphEdit::_gui_input);
ClassDB::bind_method(D_METHOD("_update_scroll_offset"), &GraphEdit::_update_scroll_offset);
ClassDB::bind_method(D_METHOD("get_zoom_hbox"), &GraphEdit::get_zoom_hbox);
ClassDB::bind_method(D_METHOD("arrange_nodes"), &GraphEdit::arrange_nodes);
ClassDB::bind_method(D_METHOD("set_selected", "node"), &GraphEdit::set_selected);
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "right_disconnects"), "set_right_disconnects", "is_right_disconnects_enabled");
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "scroll_offset"), "set_scroll_ofs", "get_scroll_ofs");
ADD_PROPERTY(PropertyInfo(Variant::INT, "snap_distance"), "set_snap", "get_snap");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_snap"), "set_use_snap", "is_using_snap");
ADD_GROUP("Connection Lines", "connection_lines");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "connection_lines_thickness"), "set_connection_lines_thickness", "get_connection_lines_thickness");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "connection_lines_antialiased"), "set_connection_lines_antialiased", "is_connection_lines_antialiased");
ADD_GROUP("Zoom", "");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom"), "set_zoom", "get_zoom");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_min"), "set_zoom_min", "get_zoom_min");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_max"), "set_zoom_max", "get_zoom_max");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom_step"), "set_zoom_step", "get_zoom_step");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_zoom_label"), "set_show_zoom_label", "is_showing_zoom_label");
ADD_GROUP("Minimap", "minimap");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "minimap_enabled"), "set_minimap_enabled", "is_minimap_enabled");
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "minimap_size"), "set_minimap_size", "get_minimap_size");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "minimap_opacity"), "set_minimap_opacity", "get_minimap_opacity");
ADD_SIGNAL(MethodInfo("connection_request", PropertyInfo(Variant::STRING_NAME, "from"), PropertyInfo(Variant::INT, "from_slot"), PropertyInfo(Variant::STRING_NAME, "to"), PropertyInfo(Variant::INT, "to_slot")));
ADD_SIGNAL(MethodInfo("disconnection_request", PropertyInfo(Variant::STRING_NAME, "from"), PropertyInfo(Variant::INT, "from_slot"), PropertyInfo(Variant::STRING_NAME, "to"), PropertyInfo(Variant::INT, "to_slot")));
ADD_SIGNAL(MethodInfo("popup_request", PropertyInfo(Variant::VECTOR2, "position")));
ADD_SIGNAL(MethodInfo("duplicate_nodes_request"));
ADD_SIGNAL(MethodInfo("copy_nodes_request"));
ADD_SIGNAL(MethodInfo("paste_nodes_request"));
ADD_SIGNAL(MethodInfo("node_selected", PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
ADD_SIGNAL(MethodInfo("node_deselected", PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
ADD_SIGNAL(MethodInfo("connection_to_empty", PropertyInfo(Variant::STRING_NAME, "from"), PropertyInfo(Variant::INT, "from_slot"), PropertyInfo(Variant::VECTOR2, "release_position")));
ADD_SIGNAL(MethodInfo("connection_from_empty", PropertyInfo(Variant::STRING_NAME, "to"), PropertyInfo(Variant::INT, "to_slot"), PropertyInfo(Variant::VECTOR2, "release_position")));
ADD_SIGNAL(MethodInfo("delete_nodes_request"));
ADD_SIGNAL(MethodInfo("begin_node_move"));
ADD_SIGNAL(MethodInfo("end_node_move"));
ADD_SIGNAL(MethodInfo("scroll_offset_changed", PropertyInfo(Variant::VECTOR2, "ofs")));
}
GraphEdit::GraphEdit() {
set_focus_mode(FOCUS_ALL);
// Allow dezooming 8 times from the default zoom level.
// At low zoom levels, text is unreadable due to its small size and poor filtering,
// but this is still useful for previewing and navigation.
zoom_min = (1 / Math::pow(zoom_step, 8));
// Allow zooming 4 times from the default zoom level.
zoom_max = (1 * Math::pow(zoom_step, 4));
top_layer = memnew(GraphEditFilter(this));
add_child(top_layer);
top_layer->set_mouse_filter(MOUSE_FILTER_PASS);
top_layer->set_anchors_and_offsets_preset(Control::PRESET_WIDE);
top_layer->connect("draw", callable_mp(this, &GraphEdit::_top_layer_draw));
top_layer->connect("gui_input", callable_mp(this, &GraphEdit::_top_layer_input));
connections_layer = memnew(Control);
add_child(connections_layer);
connections_layer->connect("draw", callable_mp(this, &GraphEdit::_connections_layer_draw));
connections_layer->set_name("CLAYER");
connections_layer->set_disable_visibility_clip(true); // so it can draw freely and be offset
connections_layer->set_mouse_filter(MOUSE_FILTER_IGNORE);
h_scroll = memnew(HScrollBar);
h_scroll->set_name("_h_scroll");
top_layer->add_child(h_scroll);
v_scroll = memnew(VScrollBar);
v_scroll->set_name("_v_scroll");
top_layer->add_child(v_scroll);
//set large minmax so it can scroll even if not resized yet
h_scroll->set_min(-10000);
h_scroll->set_max(10000);
v_scroll->set_min(-10000);
v_scroll->set_max(10000);
h_scroll->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
v_scroll->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
zoom_hb = memnew(HBoxContainer);
top_layer->add_child(zoom_hb);
zoom_hb->set_position(Vector2(10, 10));
zoom_label = memnew(Label);
zoom_hb->add_child(zoom_label);
zoom_label->set_visible(false);
zoom_label->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
zoom_label->set_align(Label::ALIGN_CENTER);
#ifdef TOOLS_ENABLED
zoom_label->set_custom_minimum_size(Size2(48, 0) * EDSCALE);
#else
zoom_label->set_custom_minimum_size(Size2(48, 0));
#endif
_update_zoom_label();
zoom_minus = memnew(Button);
zoom_minus->set_flat(true);
zoom_hb->add_child(zoom_minus);
zoom_minus->set_tooltip(RTR("Zoom Out"));
zoom_minus->connect("pressed", callable_mp(this, &GraphEdit::_zoom_minus));
zoom_minus->set_focus_mode(FOCUS_NONE);
zoom_reset = memnew(Button);
zoom_reset->set_flat(true);
zoom_hb->add_child(zoom_reset);
zoom_reset->set_tooltip(RTR("Zoom Reset"));
zoom_reset->connect("pressed", callable_mp(this, &GraphEdit::_zoom_reset));
zoom_reset->set_focus_mode(FOCUS_NONE);
zoom_plus = memnew(Button);
zoom_plus->set_flat(true);
zoom_hb->add_child(zoom_plus);
zoom_plus->set_tooltip(RTR("Zoom In"));
zoom_plus->connect("pressed", callable_mp(this, &GraphEdit::_zoom_plus));
zoom_plus->set_focus_mode(FOCUS_NONE);
snap_button = memnew(Button);
snap_button->set_flat(true);
snap_button->set_toggle_mode(true);
snap_button->set_tooltip(RTR("Enable snap and show grid."));
snap_button->connect("pressed", callable_mp(this, &GraphEdit::_snap_toggled));
snap_button->set_pressed(true);
snap_button->set_focus_mode(FOCUS_NONE);
zoom_hb->add_child(snap_button);
snap_amount = memnew(SpinBox);
snap_amount->set_min(5);
snap_amount->set_max(100);
snap_amount->set_step(1);
snap_amount->set_value(20);
snap_amount->connect("value_changed", callable_mp(this, &GraphEdit::_snap_value_changed));
zoom_hb->add_child(snap_amount);
minimap_button = memnew(Button);
minimap_button->set_flat(true);
minimap_button->set_toggle_mode(true);
minimap_button->set_tooltip(RTR("Enable grid minimap."));
minimap_button->connect("pressed", callable_mp(this, &GraphEdit::_minimap_toggled));
minimap_button->set_pressed(true);
minimap_button->set_focus_mode(FOCUS_NONE);
zoom_hb->add_child(minimap_button);
layout_button = memnew(Button);
layout_button->set_flat(true);
zoom_hb->add_child(layout_button);
layout_button->set_tooltip(RTR("Arrange nodes."));
layout_button->connect("pressed", callable_mp(this, &GraphEdit::arrange_nodes));
layout_button->set_focus_mode(FOCUS_NONE);
Vector2 minimap_size = Vector2(240, 160);
float minimap_opacity = 0.65;
minimap = memnew(GraphEditMinimap(this));
top_layer->add_child(minimap);
minimap->set_name("_minimap");
minimap->set_modulate(Color(1, 1, 1, minimap_opacity));
minimap->set_mouse_filter(MOUSE_FILTER_PASS);
minimap->set_custom_minimum_size(Vector2(50, 50));
minimap->set_size(minimap_size);
minimap->set_anchors_preset(Control::PRESET_BOTTOM_RIGHT);
minimap->set_offset(Side::SIDE_LEFT, -minimap_size.x - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_TOP, -minimap_size.y - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
minimap->connect("draw", callable_mp(this, &GraphEdit::_minimap_draw));
set_clip_contents(true);
}
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