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virtualx-engine/scene/gui/graph_edit.cpp
Hendrik Brucker 5afe78bd9c Clean up/refactor GraphNode and make it more flexible 
Split GraphNode into GraphElement and GraphNode, add custom
titlebar, and adjust theming.
2023-09-07 17:29:06 +02:00

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/**************************************************************************/
/* graph_edit.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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"
#include "scene/gui/graph_edit_arranger.h"
#include "scene/gui/view_panner.h"
#include "scene/resources/style_box_flat.h"
constexpr int MINIMAP_OFFSET = 12;
constexpr int MINIMAP_PADDING = 5;
constexpr int MIN_DRAG_DISTANCE_FOR_VALID_CONNECTION = 20;
constexpr int MAX_CONNECTION_LINE_CURVE_TESSELATION_STAGES = 5;
constexpr int GRID_MINOR_STEPS_PER_MAJOR_LINE = 10;
constexpr int GRID_MIN_SNAPPING_DISTANCE = 2;
constexpr int GRID_MAX_SNAPPING_DISTANCE = 100;
constexpr float CONNECTING_TARGET_LINE_COLOR_BRIGHTENING = 0.4;
bool GraphEditFilter::has_point(const Point2 &p_point) const {
return ge->_filter_input(p_point);
}
GraphEditFilter::GraphEditFilter(GraphEdit *p_edit) {
ge = p_edit;
}
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;
}
Control::CursorShape GraphEditMinimap::get_cursor_shape(const Point2 &p_pos) const {
Ref<Texture2D> resizer = get_theme_icon(SNAME("resizer"));
if (is_resizing || (p_pos.x < resizer->get_width() && p_pos.y < resizer->get_height())) {
return CURSOR_FDIAGSIZE;
}
return Control::get_cursor_shape(p_pos);
}
void GraphEditMinimap::update_minimap() {
Vector2 graph_offset = _get_graph_offset();
Vector2 graph_size = _get_graph_size();
camera_position = ge->get_scroll_offset() - graph_offset;
camera_size = ge->get_size();
Vector2 render_size = _get_render_size();
float target_ratio = render_size.width / render_size.height;
float graph_ratio = graph_size.width / graph_size.height;
graph_proportions = graph_size;
graph_padding = Vector2(0, 0);
if (graph_ratio > target_ratio) {
graph_proportions.width = graph_size.width;
graph_proportions.height = graph_size.width / target_ratio;
graph_padding.y = Math::abs(graph_size.height - graph_proportions.y) / 2;
} else {
graph_proportions.width = graph_size.height * target_ratio;
graph_proportions.height = graph_size.height;
graph_padding.x = Math::abs(graph_size.width - 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_pos = (camera_center - camera_viewport / 2);
return Rect2(camera_pos, 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_scrollbar->get_min(), ge->v_scrollbar->get_min());
}
Vector2 GraphEditMinimap::_get_graph_size() {
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());
if (graph_size.width == 0) {
graph_size.width = 1;
}
if (graph_size.height == 0) {
graph_size.height = 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.width / graph_proportions.x;
map_position.y = p_position.y * render_size.height / 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.width;
graph_position.y = p_position.y * graph_proportions.y / render_size.height;
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() == MouseButton::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.width = MIN(get_size().width - mm->get_relative().x, ge->get_size().width - 2.0 * minimap_padding.x);
new_minimap_size.height = MIN(get_size().height - mm->get_relative().y, ge->get_size().height - 2.0 * minimap_padding.y);
ge->set_minimap_size(new_minimap_size);
queue_redraw();
} 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_offset(p_offset + graph_offset - camera_size / 2);
}
Control::CursorShape GraphEdit::get_cursor_shape(const Point2 &p_pos) const {
if (moving_selection) {
return CURSOR_MOVE;
}
return Control::get_cursor_shape(p_pos);
}
PackedStringArray GraphEdit::get_configuration_warnings() const {
PackedStringArray warnings = Control::get_configuration_warnings();
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."));
return warnings;
}
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_node = p_from;
c.from_port = p_from_port;
c.to_node = p_to;
c.to_port = p_to_port;
c.activity = 0;
connections.push_back(c);
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
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_node == p_from && E.from_port == p_from_port && E.to_node == 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_node == p_from && E->get().from_port == p_from_port && E->get().to_node == p_to && E->get().to_port == p_to_port) {
connections.erase(E);
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
return;
}
}
}
void GraphEdit::get_connection_list(List<Connection> *r_connections) const {
*r_connections = connections;
}
void GraphEdit::set_scroll_offset(const Vector2 &p_offset) {
setting_scroll_offset = true;
h_scrollbar->set_value(p_offset.x);
v_scrollbar->set_value(p_offset.y);
_update_scroll();
setting_scroll_offset = false;
}
Vector2 GraphEdit::get_scroll_offset() const {
return Vector2(h_scrollbar->get_value(), v_scrollbar->get_value());
}
void GraphEdit::_scroll_moved(double) {
if (!awaiting_scroll_offset_update) {
callable_mp(this, &GraphEdit::_update_scroll_offset).call_deferred();
awaiting_scroll_offset_update = true;
}
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
}
void GraphEdit::_update_scroll_offset() {
set_block_minimum_size_adjust(true);
for (int i = 0; i < get_child_count(); i++) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (!graph_element) {
continue;
}
Point2 pos = graph_element->get_position_offset() * zoom;
pos -= Point2(h_scrollbar->get_value(), v_scrollbar->get_value());
graph_element->set_position(pos);
if (graph_element->get_scale() != Vector2(zoom, zoom)) {
graph_element->set_scale(Vector2(zoom, zoom));
}
}
connections_layer->set_position(-Point2(h_scrollbar->get_value(), v_scrollbar->get_value()));
set_block_minimum_size_adjust(false);
awaiting_scroll_offset_update = false;
// In Godot, signals on value change are avoided by convention.
if (!setting_scroll_offset) {
emit_signal(SNAME("scroll_offset_changed"), get_scroll_offset());
}
}
void GraphEdit::_update_scroll() {
if (updating) {
return;
}
updating = true;
set_block_minimum_size_adjust(true);
Rect2 screen_rect;
for (int i = 0; i < get_child_count(); i++) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (!graph_element) {
continue;
}
Rect2 node_rect;
node_rect.position = graph_element->get_position_offset() * zoom;
node_rect.size = graph_element->get_size() * zoom;
screen_rect = screen_rect.merge(node_rect);
}
screen_rect.position -= get_size();
screen_rect.size += get_size() * 2.0;
h_scrollbar->set_min(screen_rect.position.x);
h_scrollbar->set_max(screen_rect.position.x + screen_rect.size.width);
h_scrollbar->set_page(get_size().x);
if (h_scrollbar->get_max() - h_scrollbar->get_min() <= h_scrollbar->get_page()) {
h_scrollbar->hide();
} else {
h_scrollbar->show();
}
v_scrollbar->set_min(screen_rect.position.y);
v_scrollbar->set_max(screen_rect.position.y + screen_rect.size.height);
v_scrollbar->set_page(get_size().height);
if (v_scrollbar->get_max() - v_scrollbar->get_min() <= v_scrollbar->get_page()) {
v_scrollbar->hide();
} else {
v_scrollbar->show();
}
Size2 hmin = h_scrollbar->get_combined_minimum_size();
Size2 vmin = v_scrollbar->get_combined_minimum_size();
// Avoid scrollbar overlapping.
h_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, v_scrollbar->is_visible() ? -vmin.width : 0);
v_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, h_scrollbar->is_visible() ? -hmin.height : 0);
set_block_minimum_size_adjust(false);
if (!awaiting_scroll_offset_update) {
callable_mp(this, &GraphEdit::_update_scroll_offset).call_deferred();
awaiting_scroll_offset_update = true;
}
updating = false;
}
void GraphEdit::_graph_element_moved_to_front(Node *p_node) {
GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
ERR_FAIL_NULL(graph_element);
graph_element->move_to_front();
}
void GraphEdit::_graph_element_selected(Node *p_node) {
GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
ERR_FAIL_NULL(graph_element);
emit_signal(SNAME("node_selected"), graph_element);
}
void GraphEdit::_graph_element_deselected(Node *p_node) {
GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
ERR_FAIL_NULL(graph_element);
emit_signal(SNAME("node_deselected"), graph_element);
}
void GraphEdit::_graph_element_resized(Vector2 p_new_minsize, Node *p_node) {
GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
ERR_FAIL_NULL(graph_element);
graph_element->set_size(p_new_minsize);
}
void GraphEdit::_graph_element_moved(Node *p_node) {
GraphElement *graph_element = Object::cast_to<GraphElement>(p_node);
ERR_FAIL_NULL(graph_element);
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
}
void GraphEdit::_graph_node_slot_updated(int p_index, Node *p_node) {
GraphNode *graph_node = Object::cast_to<GraphNode>(p_node);
ERR_FAIL_NULL(graph_node);
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
}
void GraphEdit::add_child_notify(Node *p_child) {
Control::add_child_notify(p_child);
// Keep the top layer always on top!
callable_mp((CanvasItem *)top_layer, &CanvasItem::move_to_front).call_deferred();
GraphElement *graph_element = Object::cast_to<GraphElement>(p_child);
if (graph_element) {
graph_element->connect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_element_moved).bind(graph_element));
graph_element->connect("node_selected", callable_mp(this, &GraphEdit::_graph_element_selected).bind(graph_element));
graph_element->connect("node_deselected", callable_mp(this, &GraphEdit::_graph_element_deselected).bind(graph_element));
GraphNode *graph_node = Object::cast_to<GraphNode>(graph_element);
if (graph_node) {
graph_element->connect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated).bind(graph_element));
}
graph_element->connect("raise_request", callable_mp(this, &GraphEdit::_graph_element_moved_to_front).bind(graph_element));
graph_element->connect("resize_request", callable_mp(this, &GraphEdit::_graph_element_resized).bind(graph_element));
graph_element->connect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::queue_redraw));
graph_element->connect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::queue_redraw));
graph_element->set_scale(Vector2(zoom, zoom));
_graph_element_moved(graph_element);
graph_element->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()) {
// Keep the top layer always on top!
callable_mp((CanvasItem *)top_layer, &CanvasItem::move_to_front).call_deferred();
}
GraphElement *graph_element = Object::cast_to<GraphElement>(p_child);
if (graph_element) {
graph_element->disconnect("position_offset_changed", callable_mp(this, &GraphEdit::_graph_element_moved));
graph_element->disconnect("node_selected", callable_mp(this, &GraphEdit::_graph_element_selected));
graph_element->disconnect("node_deselected", callable_mp(this, &GraphEdit::_graph_element_deselected));
GraphNode *graph_node = Object::cast_to<GraphNode>(graph_element);
if (graph_node) {
graph_element->disconnect("slot_updated", callable_mp(this, &GraphEdit::_graph_node_slot_updated));
}
graph_element->disconnect("raise_request", callable_mp(this, &GraphEdit::_graph_element_moved_to_front));
graph_element->disconnect("resize_request", callable_mp(this, &GraphEdit::_graph_element_resized));
// In case of the whole GraphEdit being destroyed these references can already be freed.
if (connections_layer != nullptr && connections_layer->is_inside_tree()) {
graph_element->disconnect("item_rect_changed", callable_mp((CanvasItem *)connections_layer, &CanvasItem::queue_redraw));
}
if (minimap != nullptr && minimap->is_inside_tree()) {
graph_element->disconnect("item_rect_changed", callable_mp((CanvasItem *)minimap, &GraphEditMinimap::queue_redraw));
}
}
}
void GraphEdit::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_THEME_CHANGED: {
port_hotzone_inner_extent = get_theme_constant("port_hotzone_inner_extent");
port_hotzone_outer_extent = get_theme_constant("port_hotzone_outer_extent");
zoom_minus_button->set_icon(get_theme_icon(SNAME("zoom_out")));
zoom_reset_button->set_icon(get_theme_icon(SNAME("zoom_reset")));
zoom_plus_button->set_icon(get_theme_icon(SNAME("zoom_in")));
toggle_snapping_button->set_icon(get_theme_icon(SNAME("snapping_toggle")));
show_grid_button->set_icon(get_theme_icon(SNAME("grid_toggle")));
minimap_button->set_icon(get_theme_icon(SNAME("minimap_toggle")));
layout_button->set_icon(get_theme_icon(SNAME("layout")));
zoom_label->set_custom_minimum_size(Size2(48, 0) * get_theme_default_base_scale());
} break;
case NOTIFICATION_READY: {
Size2 hmin = h_scrollbar->get_combined_minimum_size();
Size2 vmin = v_scrollbar->get_combined_minimum_size();
h_scrollbar->set_anchor_and_offset(SIDE_LEFT, ANCHOR_BEGIN, 0);
h_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
h_scrollbar->set_anchor_and_offset(SIDE_TOP, ANCHOR_END, -hmin.height);
h_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
v_scrollbar->set_anchor_and_offset(SIDE_LEFT, ANCHOR_END, -vmin.width);
v_scrollbar->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0);
v_scrollbar->set_anchor_and_offset(SIDE_TOP, ANCHOR_BEGIN, 0);
v_scrollbar->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0);
} break;
case NOTIFICATION_DRAW: {
// Draw background fill.
draw_style_box(get_theme_stylebox(SNAME("panel")), Rect2(Point2(), get_size()));
// Draw background grid.
if (show_grid) {
Vector2 offset = get_scroll_offset() / zoom;
Size2 size = get_size() / zoom;
Point2i from_pos = (offset / float(snapping_distance)).floor();
Point2i len = (size / float(snapping_distance)).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_pos.x; i < from_pos.x + len.x; i++) {
Color color;
if (ABS(i) % GRID_MINOR_STEPS_PER_MAJOR_LINE == 0) {
color = grid_major;
} else {
color = grid_minor;
}
float base_offset = i * snapping_distance * zoom - offset.x * zoom;
draw_line(Vector2(base_offset, 0), Vector2(base_offset, get_size().height), color);
}
for (int i = from_pos.y; i < from_pos.y + len.y; i++) {
Color color;
if (ABS(i) % GRID_MINOR_STEPS_PER_MAJOR_LINE == 0) {
color = grid_major;
} else {
color = grid_minor;
}
float base_offset = i * snapping_distance * zoom - offset.y * zoom;
draw_line(Vector2(0, base_offset), Vector2(get_size().width, base_offset), color);
}
}
} break;
case NOTIFICATION_RESIZED: {
_update_scroll();
top_layer->queue_redraw();
minimap->queue_redraw();
} break;
}
}
bool GraphEdit::_filter_input(const Point2 &p_point) {
Ref<Texture2D> port_icon = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
if (!graph_node || !graph_node->is_visible_in_tree()) {
continue;
}
for (int j = 0; j < graph_node->get_input_port_count(); j++) {
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_input_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
if (is_in_input_hotzone(graph_node, j, p_point / zoom, port_size)) {
return true;
}
}
for (int j = 0; j < graph_node->get_output_port_count(); j++) {
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_output_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
if (is_in_output_hotzone(graph_node, j, p_point / zoom, port_size)) {
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() == MouseButton::LEFT && mb->is_pressed()) {
Ref<Texture2D> port_icon = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
connecting_valid = false;
click_pos = mb->get_position() / zoom;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
if (!graph_node || !graph_node->is_visible_in_tree()) {
continue;
}
for (int j = 0; j < graph_node->get_output_port_count(); j++) {
Vector2 pos = graph_node->get_output_port_position(j) * zoom + graph_node->get_position();
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_output_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
if (is_in_output_hotzone(graph_node, j, click_pos, port_size)) {
if (valid_left_disconnect_types.has(graph_node->get_output_port_type(j))) {
// Check disconnect.
for (const Connection &E : connections) {
if (E.from_node == graph_node->get_name() && E.from_port == j) {
Node *to = get_node(NodePath(E.to_node));
if (Object::cast_to<GraphNode>(to)) {
connecting_from = E.to_node;
connecting_index = E.to_port;
connecting_out = false;
connecting_type = Object::cast_to<GraphNode>(to)->get_input_port_type(E.to_port);
connecting_color = Object::cast_to<GraphNode>(to)->get_input_port_color(E.to_port);
connecting_target = false;
connecting_to = pos;
if (connecting_type >= 0) {
just_disconnected = true;
emit_signal(SNAME("disconnection_request"), E.from_node, E.from_port, E.to_node, E.to_port);
to = get_node(NodePath(connecting_from)); // Maybe it was erased.
if (Object::cast_to<GraphNode>(to)) {
connecting = true;
emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, false);
}
}
return;
}
}
}
}
connecting_from = graph_node->get_name();
connecting_index = j;
connecting_out = true;
connecting_type = graph_node->get_output_port_type(j);
connecting_color = graph_node->get_output_port_color(j);
connecting_target = false;
connecting_to = pos;
if (connecting_type >= 0) {
connecting = true;
just_disconnected = false;
emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, true);
}
return;
}
}
for (int j = 0; j < graph_node->get_input_port_count(); j++) {
Vector2 pos = graph_node->get_input_port_position(j) * zoom + graph_node->get_position();
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_input_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
if (is_in_input_hotzone(graph_node, j, click_pos, port_size)) {
if (right_disconnects || valid_right_disconnect_types.has(graph_node->get_input_port_type(j))) {
// Check disconnect.
for (const Connection &E : connections) {
if (E.to_node == graph_node->get_name() && E.to_port == j) {
Node *fr = get_node(NodePath(E.from_node));
if (Object::cast_to<GraphNode>(fr)) {
connecting_from = E.from_node;
connecting_index = E.from_port;
connecting_out = true;
connecting_type = Object::cast_to<GraphNode>(fr)->get_output_port_type(E.from_port);
connecting_color = Object::cast_to<GraphNode>(fr)->get_output_port_color(E.from_port);
connecting_target = false;
connecting_to = pos;
just_disconnected = true;
if (connecting_type >= 0) {
emit_signal(SNAME("disconnection_request"), E.from_node, E.from_port, E.to_node, E.to_port);
fr = get_node(NodePath(connecting_from));
if (Object::cast_to<GraphNode>(fr)) {
connecting = true;
emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, true);
}
}
return;
}
}
}
}
connecting_from = graph_node->get_name();
connecting_index = j;
connecting_out = false;
connecting_type = graph_node->get_input_port_type(j);
connecting_color = graph_node->get_input_port_color(j);
connecting_target = false;
connecting_to = pos;
if (connecting_type >= 0) {
connecting = true;
just_disconnected = false;
emit_signal(SNAME("connection_drag_started"), connecting_from, connecting_index, false);
}
return;
}
}
}
}
Ref<InputEventMouseMotion> mm = p_ev;
if (mm.is_valid() && connecting) {
connecting_to = mm->get_position();
connecting_target = false;
top_layer->queue_redraw();
minimap->queue_redraw();
connecting_valid = just_disconnected || click_pos.distance_to(connecting_to / zoom) > MIN_DRAG_DISTANCE_FOR_VALID_CONNECTION;
if (connecting_valid) {
Vector2 mpos = mm->get_position() / zoom;
for (int i = get_child_count() - 1; i >= 0; i--) {
Ref<Texture2D> port_icon = get_theme_icon(SNAME("port"), SNAME("GraphNode"));
GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
if (!graph_node || !graph_node->is_visible_in_tree()) {
continue;
}
if (!connecting_out) {
for (int j = 0; j < graph_node->get_output_port_count(); j++) {
Vector2 pos = graph_node->get_output_port_position(j) * zoom + graph_node->get_position();
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_output_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
int type = graph_node->get_output_port_type(j);
if ((type == connecting_type ||
valid_connection_types.has(ConnectionType(connecting_type, type))) &&
is_in_output_hotzone(graph_node, j, mpos, port_size)) {
if (!is_node_hover_valid(graph_node->get_name(), j, connecting_from, connecting_index)) {
continue;
}
connecting_target = true;
connecting_to = pos;
connecting_target_to = graph_node->get_name();
connecting_target_index = j;
return;
}
}
} else {
for (int j = 0; j < graph_node->get_input_port_count(); j++) {
Vector2 pos = graph_node->get_input_port_position(j) * zoom + graph_node->get_position();
Vector2i port_size = Vector2i(port_icon->get_width(), port_icon->get_height());
// Determine slot height.
int slot_index = graph_node->get_input_port_slot(j);
Control *child = Object::cast_to<Control>(graph_node->get_child(slot_index));
port_size.height = MAX(port_size.height, child ? child->get_size().y : 0);
int type = graph_node->get_input_port_type(j);
if ((type == connecting_type || valid_connection_types.has(ConnectionType(connecting_type, type))) &&
is_in_input_hotzone(graph_node, j, mpos, port_size)) {
if (!is_node_hover_valid(connecting_from, connecting_index, graph_node->get_name(), j)) {
continue;
}
connecting_target = true;
connecting_to = pos;
connecting_target_to = graph_node->get_name();
connecting_target_index = j;
return;
}
}
}
}
}
}
if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
if (connecting_valid) {
if (connecting && connecting_target) {
if (connecting_out) {
emit_signal(SNAME("connection_request"), connecting_from, connecting_index, connecting_target_to, connecting_target_index);
} else {
emit_signal(SNAME("connection_request"), connecting_target_to, connecting_target_index, connecting_from, connecting_index);
}
} else if (!just_disconnected) {
if (connecting_out) {
emit_signal(SNAME("connection_to_empty"), connecting_from, connecting_index, mb->get_position());
} else {
emit_signal(SNAME("connection_from_empty"), connecting_from, connecting_index, mb->get_position());
}
}
}
if (connecting) {
force_connection_drag_end();
}
}
}
bool GraphEdit::_check_clickable_control(Control *p_control, const Vector2 &mpos, const Vector2 &p_offset) {
if (p_control->is_set_as_top_level() || !p_control->is_visible() || !p_control->is_inside_tree()) {
return false;
}
Rect2 control_rect = p_control->get_rect();
control_rect.position *= zoom;
control_rect.size *= zoom;
control_rect.position += p_offset;
if (!control_rect.has_point(mpos) || p_control->get_mouse_filter() == MOUSE_FILTER_IGNORE) {
// Test children.
for (int i = 0; i < p_control->get_child_count(); i++) {
Control *child_rect = Object::cast_to<Control>(p_control->get_child(i));
if (!child_rect) {
continue;
}
if (_check_clickable_control(child_rect, mpos, control_rect.position)) {
return true;
}
}
return false;
} else {
return true;
}
}
bool GraphEdit::is_in_input_hotzone(GraphNode *p_graph_node, int p_port_idx, const Vector2 &p_mouse_pos, const Vector2i &p_port_size) {
bool success;
if (GDVIRTUAL_CALL(_is_in_input_hotzone, p_graph_node, p_port_idx, p_mouse_pos, success)) {
return success;
} else {
Vector2 pos = p_graph_node->get_input_port_position(p_port_idx) * zoom + p_graph_node->get_position();
return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, true);
}
}
bool GraphEdit::is_in_output_hotzone(GraphNode *p_graph_node, int p_port_idx, const Vector2 &p_mouse_pos, const Vector2i &p_port_size) {
if (p_graph_node->is_resizable()) {
Ref<Texture2D> resizer = p_graph_node->get_theme_icon(SNAME("resizer"));
Rect2 resizer_rect = Rect2(p_graph_node->get_position() / zoom + p_graph_node->get_size() - resizer->get_size(), resizer->get_size());
if (resizer_rect.has_point(p_mouse_pos)) {
return false;
}
}
bool success;
if (GDVIRTUAL_CALL(_is_in_output_hotzone, p_graph_node, p_port_idx, p_mouse_pos, success)) {
return success;
} else {
Vector2 pos = p_graph_node->get_output_port_position(p_port_idx) * zoom + p_graph_node->get_position();
return is_in_port_hotzone(pos / zoom, p_mouse_pos, p_port_size, false);
}
}
bool GraphEdit::is_in_port_hotzone(const Vector2 &p_pos, const Vector2 &p_mouse_pos, const Vector2i &p_port_size, bool p_left) {
Rect2 hotzone = Rect2(
p_pos.x - (p_left ? port_hotzone_outer_extent : port_hotzone_inner_extent),
p_pos.y - p_port_size.height / 2.0,
port_hotzone_inner_extent + port_hotzone_outer_extent,
p_port_size.height);
if (!hotzone.has_point(p_mouse_pos)) {
return false;
}
for (int i = 0; i < get_child_count(); i++) {
GraphNode *child = Object::cast_to<GraphNode>(get_child(i));
if (!child) {
continue;
}
Rect2 child_rect = child->get_rect();
if (child_rect.has_point(p_mouse_pos * zoom)) {
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, p_mouse_pos * zoom, child_rect.position)) {
return false;
}
}
}
}
return true;
}
PackedVector2Array GraphEdit::get_connection_line(const Vector2 &p_from, const Vector2 &p_to) {
Vector<Vector2> ret;
if (GDVIRTUAL_CALL(_get_connection_line, p_from, p_to, ret)) {
return ret;
}
float x_diff = (p_to.x - p_from.x);
float cp_offset = x_diff * lines_curvature;
if (x_diff < 0) {
cp_offset *= -1;
}
Curve2D curve;
curve.add_point(p_from);
curve.set_point_out(0, Vector2(cp_offset, 0));
curve.add_point(p_to);
curve.set_point_in(1, Vector2(-cp_offset, 0));
if (lines_curvature > 0) {
return curve.tessellate(MAX_CONNECTION_LINE_CURVE_TESSELATION_STAGES, 2.0);
} else {
return curve.tessellate(1);
}
}
void 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) {
Vector<Vector2> points = get_connection_line(p_from / p_zoom, p_to / p_zoom);
Vector<Vector2> scaled_points;
Vector<Color> colors;
float length = (p_from / p_zoom).distance_to(p_to / p_zoom);
for (int i = 0; i < points.size(); i++) {
float d = (p_from / p_zoom).distance_to(points[i]) / length;
colors.push_back(p_color.lerp(p_to_color, d));
scaled_points.push_back(points[i] * p_zoom);
}
// Thickness below 0.5 doesn't look good on the graph or its minimap.
p_where->draw_polyline_colors(scaled_points, colors, MAX(0.5, Math::floor(p_width * get_theme_default_base_scale())), lines_antialiased);
}
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()) {
const Connection &c = E->get();
Node *from = get_node(NodePath(c.from_node));
GraphNode *gnode_from = Object::cast_to<GraphNode>(from);
if (!gnode_from) {
to_erase.push_back(E);
continue;
}
Node *to = get_node(NodePath(c.to_node));
GraphNode *gnode_to = Object::cast_to<GraphNode>(to);
if (!gnode_to) {
to_erase.push_back(E);
continue;
}
Vector2 frompos = gnode_from->get_output_port_position(c.from_port) * zoom + gnode_from->get_position_offset() * zoom;
Color color = gnode_from->get_output_port_color(c.from_port);
Vector2 topos = gnode_to->get_input_port_position(c.to_port) * zoom + gnode_to->get_position_offset() * zoom;
Color tocolor = gnode_to->get_input_port_color(c.to_port);
if (c.activity > 0) {
color = color.lerp(activity_color, c.activity);
tocolor = tocolor.lerp(activity_color, c.activity);
}
_draw_connection_line(connections_layer, frompos, topos, color, tocolor, lines_thickness, zoom);
}
for (List<Connection>::Element *&E : to_erase) {
connections.erase(E);
}
}
void GraphEdit::_top_layer_draw() {
_update_scroll();
if (connecting) {
Node *node_from = get_node_or_null(NodePath(connecting_from));
ERR_FAIL_NULL(node_from);
GraphNode *graph_node_from = Object::cast_to<GraphNode>(node_from);
ERR_FAIL_NULL(graph_node_from);
Vector2 pos;
if (connecting_out) {
pos = graph_node_from->get_output_port_position(connecting_index) * zoom;
} else {
pos = graph_node_from->get_input_port_position(connecting_index) * zoom;
}
pos += graph_node_from->get_position();
Vector2 to_pos = connecting_to;
Color line_color = connecting_color;
// Draw the line to the mouse cursor brighter when it's over a valid target port.
if (connecting_target) {
line_color.r += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
line_color.g += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
line_color.b += CONNECTING_TARGET_LINE_COLOR_BRIGHTENING;
}
if (!connecting_out) {
SWAP(pos, to_pos);
}
_draw_connection_line(top_layer, pos, to_pos, line_color, line_color, lines_thickness, zoom);
}
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("panel")), minimap_rect);
Vector2 graph_offset = minimap->_get_graph_offset();
Vector2 minimap_offset = minimap->minimap_offset;
// Draw graph nodes.
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphNode *graph_node = Object::cast_to<GraphNode>(get_child(i));
if (!graph_node || !graph_node->is_visible()) {
continue;
}
Vector2 node_position = minimap->_convert_from_graph_position(graph_node->get_position_offset() * zoom - graph_offset) + minimap_offset;
Vector2 node_size = minimap->_convert_from_graph_position(graph_node->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> sb_frame = graph_node->get_theme_stylebox(graph_node->is_selected() ? "panel_selected" : "panel");
if (sb_frame.is_valid()) {
Color node_color = sb_frame->get_bg_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) {
Node *from = get_node(NodePath(E.from_node));
GraphNode *graph_node_from = Object::cast_to<GraphNode>(from);
if (!graph_node_from) {
continue;
}
Node *node_to = get_node(NodePath(E.to_node));
GraphNode *graph_node_to = Object::cast_to<GraphNode>(node_to);
if (!graph_node_to) {
continue;
}
Vector2 from_port_position = graph_node_from->get_position_offset() * zoom + graph_node_from->get_output_port_position(E.from_port) * zoom;
Vector2 from_position = minimap->_convert_from_graph_position(from_port_position - graph_offset) + minimap_offset;
Color from_color = graph_node_from->get_output_port_color(E.from_port);
Vector2 to_port_position = graph_node_to->get_position_offset() * zoom + graph_node_to->get_input_port_position(E.to_port) * zoom;
Vector2 to_position = minimap->_convert_from_graph_position(to_port_position - graph_offset) + minimap_offset;
Color to_color = graph_node_to->get_input_port_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_connection_line(minimap, from_position, to_position, from_color, to_color, 0.5, minimap->_convert_from_graph_position(Vector2(zoom, zoom)).length());
}
// 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 *graph_node = Object::cast_to<GraphNode>(get_child(i));
if (!graph_node) {
continue;
}
graph_node->set_selected(graph_node == p_child);
}
}
void GraphEdit::gui_input(const Ref<InputEvent> &p_ev) {
ERR_FAIL_COND(p_ev.is_null());
if (panner->gui_input(p_ev, warped_panning ? get_global_rect() : Rect2())) {
return;
}
Ref<InputEventMouseMotion> mm = p_ev;
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--) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (graph_element && graph_element->is_selected() && graph_element->is_draggable()) {
Vector2 pos = (graph_element->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 (snapping_enabled ^ Input::get_singleton()->is_key_pressed(Key::CTRL)) {
pos = pos.snapped(Vector2(snapping_distance, snapping_distance));
}
graph_element->set_position_offset(pos);
}
}
}
if (mm.is_valid() && box_selecting) {
box_selecting_to = mm->get_position();
box_selecting_rect = Rect2(box_selecting_from.min(box_selecting_to), (box_selecting_from - box_selecting_to).abs());
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (!graph_element) {
continue;
}
Rect2 r = graph_element->get_rect();
bool in_box = r.intersects(box_selecting_rect);
if (in_box) {
graph_element->set_selected(box_selection_mode_additive);
} else {
graph_element->set_selected(prev_selected.find(graph_element) != nullptr);
}
}
top_layer->queue_redraw();
minimap->queue_redraw();
}
Ref<InputEventMouseButton> mb = p_ev;
if (mb.is_valid()) {
if (mb->get_button_index() == MouseButton::RIGHT && mb->is_pressed()) {
if (box_selecting) {
box_selecting = false;
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (!graph_element) {
continue;
}
graph_element->set_selected(prev_selected.find(graph_element) != nullptr);
}
top_layer->queue_redraw();
minimap->queue_redraw();
} else {
if (connecting) {
force_connection_drag_end();
} else {
emit_signal(SNAME("popup_request"), mb->get_position());
}
}
}
if (mb->get_button_index() == MouseButton::LEFT && !mb->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--) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (graph_element) {
Rect2 r = graph_element->get_rect();
if (r.has_point(mb->get_position())) {
graph_element->set_selected(false);
}
}
}
}
if (drag_accum != Vector2()) {
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *graph_element = Object::cast_to<GraphElement>(get_child(i));
if (graph_element && graph_element->is_selected()) {
graph_element->set_drag(false);
}
}
}
if (moving_selection) {
emit_signal(SNAME("end_node_move"));
moving_selection = false;
}
dragging = false;
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
}
// Node selection logic.
if (mb->get_button_index() == MouseButton::LEFT && mb->is_pressed()) {
GraphElement *graph_element = nullptr;
// Find node which was clicked on.
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *selected_element = Object::cast_to<GraphElement>(get_child(i));
if (!selected_element) {
continue;
}
if (selected_element->is_resizing()) {
continue;
}
if (selected_element->has_point((mb->get_position() - selected_element->get_position()) / zoom)) {
graph_element = selected_element;
break;
}
}
if (graph_element) {
if (_filter_input(mb->get_position())) {
return;
}
// Left-clicked on a node, select it.
dragging = true;
drag_accum = Vector2();
just_selected = !graph_element->is_selected();
if (!graph_element->is_selected() && !Input::get_singleton()->is_key_pressed(Key::CTRL)) {
for (int i = 0; i < get_child_count(); i++) {
GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
if (!child_element) {
continue;
}
child_element->set_selected(child_element == graph_element);
}
}
graph_element->set_selected(true);
for (int i = 0; i < get_child_count(); i++) {
GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
if (!child_element) {
continue;
}
if (child_element->is_selected()) {
child_element->set_drag(true);
}
}
} else {
if (_filter_input(mb->get_position())) {
return;
}
if (panner->is_panning()) {
return;
}
// Left-clicked on empty space, start box select.
box_selecting = true;
box_selecting_from = mb->get_position();
if (mb->is_ctrl_pressed()) {
box_selection_mode_additive = true;
prev_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
if (!child_element || !child_element->is_selected()) {
continue;
}
prev_selected.push_back(child_element);
}
} else if (mb->is_shift_pressed()) {
box_selection_mode_additive = false;
prev_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
if (!child_element || !child_element->is_selected()) {
continue;
}
prev_selected.push_back(child_element);
}
} else {
box_selection_mode_additive = true;
prev_selected.clear();
for (int i = get_child_count() - 1; i >= 0; i--) {
GraphElement *child_element = Object::cast_to<GraphElement>(get_child(i));
if (!child_element) {
continue;
}
child_element->set_selected(false);
}
}
}
}
if (mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed() && box_selecting) {
// Box selection ended. Nodes were selected during mouse movement.
box_selecting = false;
box_selecting_rect = Rect2();
prev_selected.clear();
top_layer->queue_redraw();
minimap->queue_redraw();
}
}
if (p_ev->is_pressed()) {
if (p_ev->is_action("ui_graph_duplicate", true)) {
emit_signal(SNAME("duplicate_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_copy", true)) {
emit_signal(SNAME("copy_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_paste", true)) {
emit_signal(SNAME("paste_nodes_request"));
accept_event();
} else if (p_ev->is_action("ui_graph_delete", true)) {
TypedArray<StringName> nodes;
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn) {
continue;
}
if (gn->is_selected()) {
nodes.push_back(gn->get_name());
}
}
emit_signal(SNAME("close_nodes_request"), nodes);
accept_event();
}
}
}
void GraphEdit::_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event) {
h_scrollbar->set_value(h_scrollbar->get_value() - p_scroll_vec.x);
v_scrollbar->set_value(v_scrollbar->get_value() - p_scroll_vec.y);
}
void GraphEdit::_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event) {
set_zoom_custom(zoom * p_zoom_factor, p_origin);
}
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_node == p_from && E.from_port == p_from_port && E.to_node == p_to && E.to_port == p_to_port) {
if (Math::is_equal_approx(E.activity, p_activity)) {
// Update only if changed.
top_layer->queue_redraw();
minimap->queue_redraw();
connections_layer->queue_redraw();
}
E.activity = p_activity;
return;
}
}
}
void GraphEdit::clear_connections() {
connections.clear();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
}
void GraphEdit::force_connection_drag_end() {
ERR_FAIL_COND_MSG(!connecting, "Drag end requested without active drag!");
connecting = false;
connecting_valid = false;
top_layer->queue_redraw();
minimap->queue_redraw();
queue_redraw();
connections_layer->queue_redraw();
emit_signal(SNAME("connection_drag_ended"));
}
bool GraphEdit::is_node_hover_valid(const StringName &p_from, const int p_from_port, const StringName &p_to, const int p_to_port) {
bool valid = true;
GDVIRTUAL_CALL(_is_node_hover_valid, p_from, p_from_port, p_to, p_to_port, valid);
return valid;
}
void GraphEdit::set_panning_scheme(PanningScheme p_scheme) {
panning_scheme = p_scheme;
panner->set_control_scheme((ViewPanner::ControlScheme)p_scheme);
}
GraphEdit::PanningScheme GraphEdit::get_panning_scheme() const {
return panning_scheme;
}
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 scrollbar_offset = (Vector2(h_scrollbar->get_value(), v_scrollbar->get_value()) + p_center) / zoom;
zoom = p_zoom;
top_layer->queue_redraw();
zoom_minus_button->set_disabled(zoom == zoom_min);
zoom_plus_button->set_disabled(zoom == zoom_max);
_update_scroll();
minimap->queue_redraw();
connections_layer->queue_redraw();
if (is_visible_in_tree()) {
Vector2 offset = scrollbar_offset * zoom - p_center;
h_scrollbar->set_value(offset.x);
v_scrollbar->set_value(offset.y);
}
_update_zoom_label();
queue_redraw();
}
float GraphEdit::get_zoom() const {
return zoom;
}
void GraphEdit::set_zoom_step(float p_zoom_step) {
p_zoom_step = abs(p_zoom_step);
ERR_FAIL_COND(!isfinite(p_zoom_step));
if (zoom_step == p_zoom_step) {
return;
}
zoom_step = p_zoom_step;
panner->set_scroll_zoom_factor(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);
}
TypedArray<Dictionary> GraphEdit::_get_connection_list() const {
List<Connection> conns;
get_connection_list(&conns);
TypedArray<Dictionary> arr;
for (const Connection &E : conns) {
Dictionary d;
d["from_node"] = E.from_node;
d["from_port"] = E.from_port;
d["to_node"] = E.to_node;
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) {
ConnectionType ct(p_type, p_with_type);
valid_connection_types.insert(ct);
}
void GraphEdit::remove_valid_connection_type(int p_type, int p_with_type) {
ConnectionType ct(p_type, p_with_type);
valid_connection_types.erase(ct);
}
bool GraphEdit::is_valid_connection_type(int p_type, int p_with_type) const {
ConnectionType ct(p_type, p_with_type);
return valid_connection_types.has(ct);
}
void GraphEdit::set_snapping_enabled(bool p_enable) {
if (snapping_enabled == p_enable) {
return;
}
snapping_enabled = p_enable;
toggle_snapping_button->set_pressed(p_enable);
queue_redraw();
}
bool GraphEdit::is_snapping_enabled() const {
return snapping_enabled;
}
void GraphEdit::set_snapping_distance(int p_snapping_distance) {
ERR_FAIL_COND_MSG(p_snapping_distance < GRID_MIN_SNAPPING_DISTANCE || p_snapping_distance > GRID_MAX_SNAPPING_DISTANCE,
vformat("GraphEdit's snapping distance must be between %d and %d (inclusive)", GRID_MIN_SNAPPING_DISTANCE, GRID_MAX_SNAPPING_DISTANCE));
snapping_distance = p_snapping_distance;
snapping_distance_spinbox->set_value(p_snapping_distance);
queue_redraw();
}
int GraphEdit::get_snapping_distance() const {
return snapping_distance;
}
void GraphEdit::set_show_grid(bool p_show) {
if (show_grid == p_show) {
return;
}
show_grid = p_show;
show_grid_button->set_pressed(p_show);
queue_redraw();
}
bool GraphEdit::is_showing_grid() const {
return show_grid;
}
void GraphEdit::_snapping_toggled() {
snapping_enabled = toggle_snapping_button->is_pressed();
}
void GraphEdit::_snapping_distance_changed(double) {
snapping_distance = snapping_distance_spinbox->get_value();
queue_redraw();
}
void GraphEdit::_show_grid_toggled() {
show_grid = show_grid_button->is_pressed();
queue_redraw();
}
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.width - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_TOP, -minimap_size.height - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_RIGHT, -MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_BOTTOM, -MINIMAP_OFFSET);
minimap->queue_redraw();
}
Vector2 GraphEdit::get_minimap_size() const {
return minimap->get_size();
}
void GraphEdit::set_minimap_opacity(float p_opacity) {
if (minimap->get_modulate().a == p_opacity) {
return;
}
minimap->set_modulate(Color(1, 1, 1, p_opacity));
minimap->queue_redraw();
}
float GraphEdit::get_minimap_opacity() const {
Color minimap_modulate = minimap->get_modulate();
return minimap_modulate.a;
}
void GraphEdit::set_minimap_enabled(bool p_enable) {
if (minimap_button->is_pressed() == p_enable) {
return;
}
minimap_button->set_pressed(p_enable);
_minimap_toggled();
minimap->queue_redraw();
}
bool GraphEdit::is_minimap_enabled() const {
return minimap_button->is_pressed();
}
void GraphEdit::set_arrange_nodes_button_hidden(bool p_enable) {
arrange_nodes_button_hidden = p_enable;
if (arrange_nodes_button_hidden) {
layout_button->hide();
} else {
layout_button->show();
}
}
bool GraphEdit::is_arrange_nodes_button_hidden() const {
return arrange_nodes_button_hidden;
}
void GraphEdit::_minimap_toggled() {
if (is_minimap_enabled()) {
minimap->set_visible(true);
minimap->queue_redraw();
} else {
minimap->set_visible(false);
}
}
void GraphEdit::set_connection_lines_curvature(float p_curvature) {
lines_curvature = p_curvature;
queue_redraw();
}
float GraphEdit::get_connection_lines_curvature() const {
return lines_curvature;
}
void GraphEdit::set_connection_lines_thickness(float p_thickness) {
if (lines_thickness == p_thickness) {
return;
}
lines_thickness = p_thickness;
queue_redraw();
}
float GraphEdit::get_connection_lines_thickness() const {
return lines_thickness;
}
void GraphEdit::set_connection_lines_antialiased(bool p_antialiased) {
if (lines_antialiased == p_antialiased) {
return;
}
lines_antialiased = p_antialiased;
queue_redraw();
}
bool GraphEdit::is_connection_lines_antialiased() const {
return lines_antialiased;
}
HBoxContainer *GraphEdit::get_menu_hbox() {
return menu_hbox;
}
Ref<ViewPanner> GraphEdit::get_panner() {
return panner;
}
void GraphEdit::set_warped_panning(bool p_warped) {
warped_panning = p_warped;
}
void GraphEdit::arrange_nodes() {
arranger->arrange_nodes();
}
void GraphEdit::_bind_methods() {
ClassDB::bind_method(D_METHOD("connect_node", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::connect_node);
ClassDB::bind_method(D_METHOD("is_node_connected", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::is_node_connected);
ClassDB::bind_method(D_METHOD("disconnect_node", "from_node", "from_port", "to_node", "to_port"), &GraphEdit::disconnect_node);
ClassDB::bind_method(D_METHOD("set_connection_activity", "from_node", "from_port", "to_node", "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("force_connection_drag_end"), &GraphEdit::force_connection_drag_end);
ClassDB::bind_method(D_METHOD("get_scroll_offset"), &GraphEdit::get_scroll_offset);
ClassDB::bind_method(D_METHOD("set_scroll_offset", "offset"), &GraphEdit::set_scroll_offset);
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("get_connection_line", "from_node", "to_node"), &GraphEdit::get_connection_line);
ClassDB::bind_method(D_METHOD("set_panning_scheme", "scheme"), &GraphEdit::set_panning_scheme);
ClassDB::bind_method(D_METHOD("get_panning_scheme"), &GraphEdit::get_panning_scheme);
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_show_grid", "enable"), &GraphEdit::set_show_grid);
ClassDB::bind_method(D_METHOD("is_showing_grid"), &GraphEdit::is_showing_grid);
ClassDB::bind_method(D_METHOD("set_snapping_enabled", "enable"), &GraphEdit::set_snapping_enabled);
ClassDB::bind_method(D_METHOD("is_snapping_enabled"), &GraphEdit::is_snapping_enabled);
ClassDB::bind_method(D_METHOD("set_snapping_distance", "pixels"), &GraphEdit::set_snapping_distance);
ClassDB::bind_method(D_METHOD("get_snapping_distance"), &GraphEdit::get_snapping_distance);
ClassDB::bind_method(D_METHOD("set_connection_lines_curvature", "curvature"), &GraphEdit::set_connection_lines_curvature);
ClassDB::bind_method(D_METHOD("get_connection_lines_curvature"), &GraphEdit::get_connection_lines_curvature);
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_arrange_nodes_button_hidden", "enable"), &GraphEdit::set_arrange_nodes_button_hidden);
ClassDB::bind_method(D_METHOD("is_arrange_nodes_button_hidden"), &GraphEdit::is_arrange_nodes_button_hidden);
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);
GDVIRTUAL_BIND(_is_in_input_hotzone, "in_node", "in_port", "mouse_position");
GDVIRTUAL_BIND(_is_in_output_hotzone, "in_node", "in_port", "mouse_position");
ClassDB::bind_method(D_METHOD("get_menu_hbox"), &GraphEdit::get_menu_hbox);
ClassDB::bind_method(D_METHOD("arrange_nodes"), &GraphEdit::arrange_nodes);
ClassDB::bind_method(D_METHOD("set_selected", "node"), &GraphEdit::set_selected);
GDVIRTUAL_BIND(_get_connection_line, "from_position", "to_position")
GDVIRTUAL_BIND(_is_node_hover_valid, "from_node", "from_port", "to_node", "to_port");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "right_disconnects"), "set_right_disconnects", "is_right_disconnects_enabled");
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "scroll_offset", PROPERTY_HINT_NONE, "suffix:px"), "set_scroll_offset", "get_scroll_offset");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "show_grid"), "set_show_grid", "is_showing_grid");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "snapping_enabled"), "set_snapping_enabled", "is_snapping_enabled");
ADD_PROPERTY(PropertyInfo(Variant::INT, "snapping_distance", PROPERTY_HINT_NONE, "suffix:px"), "set_snapping_distance", "get_snapping_distance");
ADD_PROPERTY(PropertyInfo(Variant::INT, "panning_scheme", PROPERTY_HINT_ENUM, "Scroll Zooms,Scroll Pans"), "set_panning_scheme", "get_panning_scheme");
ADD_GROUP("Connection Lines", "connection_lines");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "connection_lines_curvature"), "set_connection_lines_curvature", "get_connection_lines_curvature");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "connection_lines_thickness", PROPERTY_HINT_NONE, "suffix:px"), "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", PROPERTY_HINT_NONE, "suffix:px"), "set_minimap_size", "get_minimap_size");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "minimap_opacity"), "set_minimap_opacity", "get_minimap_opacity");
ADD_GROUP("UI", "");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "arrange_nodes_button_hidden"), "set_arrange_nodes_button_hidden", "is_arrange_nodes_button_hidden");
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")));
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")));
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_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::VECTOR2, "release_position")));
ADD_SIGNAL(MethodInfo("connection_from_empty", PropertyInfo(Variant::STRING_NAME, "to_node"), PropertyInfo(Variant::INT, "to_port"), PropertyInfo(Variant::VECTOR2, "release_position")));
ADD_SIGNAL(MethodInfo("close_nodes_request", PropertyInfo(Variant::ARRAY, "nodes", PROPERTY_HINT_ARRAY_TYPE, "StringName")));
ADD_SIGNAL(MethodInfo("begin_node_move"));
ADD_SIGNAL(MethodInfo("end_node_move"));
ADD_SIGNAL(MethodInfo("scroll_offset_changed", PropertyInfo(Variant::VECTOR2, "offset")));
ADD_SIGNAL(MethodInfo("connection_drag_started", PropertyInfo(Variant::STRING_NAME, "from_node"), PropertyInfo(Variant::INT, "from_port"), PropertyInfo(Variant::BOOL, "is_output")));
ADD_SIGNAL(MethodInfo("connection_drag_ended"));
BIND_ENUM_CONSTANT(SCROLL_ZOOMS);
BIND_ENUM_CONSTANT(SCROLL_PANS);
}
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));
panner.instantiate();
panner->set_callbacks(callable_mp(this, &GraphEdit::_pan_callback), callable_mp(this, &GraphEdit::_zoom_callback));
top_layer = memnew(GraphEditFilter(this));
add_child(top_layer, false, INTERNAL_MODE_BACK);
top_layer->set_mouse_filter(MOUSE_FILTER_PASS);
top_layer->set_anchors_and_offsets_preset(Control::PRESET_FULL_RECT);
top_layer->connect("draw", callable_mp(this, &GraphEdit::_top_layer_draw));
top_layer->connect("gui_input", callable_mp(this, &GraphEdit::_top_layer_input));
top_layer->connect("focus_exited", callable_mp(panner.ptr(), &ViewPanner::release_pan_key));
connections_layer = memnew(Control);
add_child(connections_layer, false);
connections_layer->connect("draw", callable_mp(this, &GraphEdit::_connections_layer_draw));
connections_layer->set_name("_connection_layer");
connections_layer->set_disable_visibility_clip(true); // Necessary, so it can draw freely and be offset.
connections_layer->set_mouse_filter(MOUSE_FILTER_IGNORE);
h_scrollbar = memnew(HScrollBar);
h_scrollbar->set_name("_h_scroll");
top_layer->add_child(h_scrollbar);
v_scrollbar = memnew(VScrollBar);
v_scrollbar->set_name("_v_scroll");
top_layer->add_child(v_scrollbar);
// Set large minmax so it can scroll even if not resized yet.
h_scrollbar->set_min(-10000);
h_scrollbar->set_max(10000);
v_scrollbar->set_min(-10000);
v_scrollbar->set_max(10000);
h_scrollbar->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
v_scrollbar->connect("value_changed", callable_mp(this, &GraphEdit::_scroll_moved));
menu_hbox = memnew(HBoxContainer);
top_layer->add_child(menu_hbox);
menu_hbox->set_position(Vector2(10, 10));
zoom_label = memnew(Label);
menu_hbox->add_child(zoom_label);
zoom_label->set_visible(false);
zoom_label->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
zoom_label->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
zoom_label->set_custom_minimum_size(Size2(48, 0));
_update_zoom_label();
zoom_minus_button = memnew(Button);
zoom_minus_button->set_flat(true);
menu_hbox->add_child(zoom_minus_button);
zoom_minus_button->set_tooltip_text(RTR("Zoom Out"));
zoom_minus_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_minus));
zoom_minus_button->set_focus_mode(FOCUS_NONE);
zoom_reset_button = memnew(Button);
zoom_reset_button->set_flat(true);
menu_hbox->add_child(zoom_reset_button);
zoom_reset_button->set_tooltip_text(RTR("Zoom Reset"));
zoom_reset_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_reset));
zoom_reset_button->set_focus_mode(FOCUS_NONE);
zoom_plus_button = memnew(Button);
zoom_plus_button->set_flat(true);
menu_hbox->add_child(zoom_plus_button);
zoom_plus_button->set_tooltip_text(RTR("Zoom In"));
zoom_plus_button->connect("pressed", callable_mp(this, &GraphEdit::_zoom_plus));
zoom_plus_button->set_focus_mode(FOCUS_NONE);
show_grid_button = memnew(Button);
show_grid_button->set_flat(true);
show_grid_button->set_toggle_mode(true);
show_grid_button->set_tooltip_text(RTR("Toggle the visual grid."));
show_grid_button->connect("pressed", callable_mp(this, &GraphEdit::_show_grid_toggled));
show_grid_button->set_pressed(true);
show_grid_button->set_focus_mode(FOCUS_NONE);
menu_hbox->add_child(show_grid_button);
toggle_snapping_button = memnew(Button);
toggle_snapping_button->set_flat(true);
toggle_snapping_button->set_toggle_mode(true);
toggle_snapping_button->set_tooltip_text(RTR("Toggle snapping to the grid."));
toggle_snapping_button->connect("pressed", callable_mp(this, &GraphEdit::_snapping_toggled));
toggle_snapping_button->set_pressed(snapping_enabled);
toggle_snapping_button->set_focus_mode(FOCUS_NONE);
menu_hbox->add_child(toggle_snapping_button);
snapping_distance_spinbox = memnew(SpinBox);
snapping_distance_spinbox->set_min(GRID_MIN_SNAPPING_DISTANCE);
snapping_distance_spinbox->set_max(GRID_MAX_SNAPPING_DISTANCE);
snapping_distance_spinbox->set_step(1);
snapping_distance_spinbox->set_value(snapping_distance);
snapping_distance_spinbox->set_tooltip_text(RTR("Change the snapping distance."));
snapping_distance_spinbox->connect("value_changed", callable_mp(this, &GraphEdit::_snapping_distance_changed));
menu_hbox->add_child(snapping_distance_spinbox);
minimap_button = memnew(Button);
minimap_button->set_flat(true);
minimap_button->set_toggle_mode(true);
minimap_button->set_tooltip_text(RTR("Toggle the graph minimap."));
minimap_button->connect("pressed", callable_mp(this, &GraphEdit::_minimap_toggled));
minimap_button->set_pressed(show_grid);
minimap_button->set_focus_mode(FOCUS_NONE);
menu_hbox->add_child(minimap_button);
layout_button = memnew(Button);
layout_button->set_flat(true);
menu_hbox->add_child(layout_button);
layout_button->set_tooltip_text(RTR("Automatically arrange selected 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.width - MINIMAP_OFFSET);
minimap->set_offset(Side::SIDE_TOP, -minimap_size.height - 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);
arranger = Ref<GraphEditArranger>(memnew(GraphEditArranger(this)));
}
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