godot/scene/gui/graph_element.cpp

245 lines
8.1 KiB
C++

/**************************************************************************/
/* graph_element.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_element.h"
#include "core/string/translation.h"
#include "scene/gui/graph_edit.h"
#include "scene/theme/theme_db.h"
#ifdef TOOLS_ENABLED
void GraphElement::_edit_set_position(const Point2 &p_position) {
GraphEdit *graph = Object::cast_to<GraphEdit>(get_parent());
if (graph) {
Point2 offset = (p_position + graph->get_scroll_offset()) * graph->get_zoom();
set_position_offset(offset);
}
set_position(p_position);
}
#endif
void GraphElement::_resort() {
Size2 size = get_size();
for (int i = 0; i < get_child_count(); i++) {
Control *child = as_sortable_control(get_child(i));
if (!child) {
continue;
}
fit_child_in_rect(child, Rect2(Point2(), size));
}
}
Size2 GraphElement::get_minimum_size() const {
Size2 minsize;
for (int i = 0; i < get_child_count(); i++) {
Control *child = Object::cast_to<Control>(get_child(i));
if (!child || child->is_set_as_top_level()) {
continue;
}
Size2i size = child->get_combined_minimum_size();
minsize = minsize.max(size);
}
return minsize;
}
void GraphElement::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_SORT_CHILDREN: {
_resort();
} break;
case NOTIFICATION_LAYOUT_DIRECTION_CHANGED:
case NOTIFICATION_TRANSLATION_CHANGED:
case NOTIFICATION_THEME_CHANGED: {
update_minimum_size();
queue_redraw();
} break;
}
}
void GraphElement::_validate_property(PropertyInfo &p_property) const {
Control::_validate_property(p_property);
GraphEdit *graph = Object::cast_to<GraphEdit>(get_parent());
if (graph) {
if (p_property.name == "position") {
p_property.usage |= PROPERTY_USAGE_READ_ONLY;
}
}
}
void GraphElement::set_position_offset(const Vector2 &p_offset) {
if (position_offset == p_offset) {
return;
}
position_offset = p_offset;
emit_signal(SNAME("position_offset_changed"));
queue_redraw();
}
Vector2 GraphElement::get_position_offset() const {
return position_offset;
}
void GraphElement::set_selected(bool p_selected) {
if (!is_selectable() || selected == p_selected) {
return;
}
selected = p_selected;
emit_signal(p_selected ? SNAME("node_selected") : SNAME("node_deselected"));
queue_redraw();
}
bool GraphElement::is_selected() {
return selected;
}
void GraphElement::set_drag(bool p_drag) {
if (p_drag) {
drag_from = get_position_offset();
} else {
emit_signal(SNAME("dragged"), drag_from, get_position_offset()); // Required for undo/redo.
}
}
Vector2 GraphElement::get_drag_from() {
return drag_from;
}
void GraphElement::gui_input(const Ref<InputEvent> &p_ev) {
ERR_FAIL_COND(p_ev.is_null());
Ref<InputEventMouseButton> mb = p_ev;
if (mb.is_valid()) {
ERR_FAIL_NULL_MSG(get_parent_control(), "GraphElement must be the child of a GraphEdit node.");
if (mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
Vector2 mpos = mb->get_position();
if (resizable && mpos.x > get_size().x - theme_cache.resizer->get_width() && mpos.y > get_size().y - theme_cache.resizer->get_height()) {
resizing = true;
resizing_from = mpos;
resizing_from_size = get_size();
accept_event();
return;
}
emit_signal(SNAME("raise_request"));
}
if (!mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT) {
if (resizing) {
resizing = false;
emit_signal(SNAME("resize_end"), get_size());
return;
}
}
}
Ref<InputEventMouseMotion> mm = p_ev;
if (resizing && mm.is_valid()) {
Vector2 mpos = mm->get_position();
Vector2 diff = mpos - resizing_from;
emit_signal(SNAME("resize_request"), resizing_from_size + diff);
}
}
void GraphElement::set_resizable(bool p_enable) {
if (resizable == p_enable) {
return;
}
resizable = p_enable;
queue_redraw();
}
bool GraphElement::is_resizable() const {
return resizable;
}
void GraphElement::set_draggable(bool p_draggable) {
draggable = p_draggable;
}
bool GraphElement::is_draggable() {
return draggable;
}
void GraphElement::set_selectable(bool p_selectable) {
if (!p_selectable) {
set_selected(false);
}
selectable = p_selectable;
}
bool GraphElement::is_selectable() {
return selectable;
}
void GraphElement::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_resizable", "resizable"), &GraphElement::set_resizable);
ClassDB::bind_method(D_METHOD("is_resizable"), &GraphElement::is_resizable);
ClassDB::bind_method(D_METHOD("set_draggable", "draggable"), &GraphElement::set_draggable);
ClassDB::bind_method(D_METHOD("is_draggable"), &GraphElement::is_draggable);
ClassDB::bind_method(D_METHOD("set_selectable", "selectable"), &GraphElement::set_selectable);
ClassDB::bind_method(D_METHOD("is_selectable"), &GraphElement::is_selectable);
ClassDB::bind_method(D_METHOD("set_selected", "selected"), &GraphElement::set_selected);
ClassDB::bind_method(D_METHOD("is_selected"), &GraphElement::is_selected);
ClassDB::bind_method(D_METHOD("set_position_offset", "offset"), &GraphElement::set_position_offset);
ClassDB::bind_method(D_METHOD("get_position_offset"), &GraphElement::get_position_offset);
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "position_offset"), "set_position_offset", "get_position_offset");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "resizable"), "set_resizable", "is_resizable");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draggable"), "set_draggable", "is_draggable");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selectable"), "set_selectable", "is_selectable");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selected"), "set_selected", "is_selected");
ADD_SIGNAL(MethodInfo("node_selected"));
ADD_SIGNAL(MethodInfo("node_deselected"));
ADD_SIGNAL(MethodInfo("raise_request"));
ADD_SIGNAL(MethodInfo("delete_request"));
ADD_SIGNAL(MethodInfo("resize_request", PropertyInfo(Variant::VECTOR2, "new_size")));
ADD_SIGNAL(MethodInfo("resize_end", PropertyInfo(Variant::VECTOR2, "new_size")));
ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::VECTOR2, "from"), PropertyInfo(Variant::VECTOR2, "to")));
ADD_SIGNAL(MethodInfo("position_offset_changed"));
BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, GraphElement, resizer);
}