godot/scene/2d/canvas_modulate.cpp

/*************************************************************************/
/*  canvas_modulate.cpp                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "canvas_modulate.h"

void CanvasModulate::_notification(int p_what) {
	if (p_what == NOTIFICATION_ENTER_CANVAS) {
		if (is_visible_in_tree()) {
			RS::get_singleton()->canvas_set_modulate(get_canvas(), color);
			add_to_group("_canvas_modulate_" + itos(get_canvas().get_id()));
		}

	} else if (p_what == NOTIFICATION_EXIT_CANVAS) {
		if (is_visible_in_tree()) {
			RS::get_singleton()->canvas_set_modulate(get_canvas(), Color(1, 1, 1, 1));
			remove_from_group("_canvas_modulate_" + itos(get_canvas().get_id()));
		}
	} else if (p_what == NOTIFICATION_VISIBILITY_CHANGED) {
		if (is_visible_in_tree()) {
			RS::get_singleton()->canvas_set_modulate(get_canvas(), color);
			add_to_group("_canvas_modulate_" + itos(get_canvas().get_id()));
		} else {
			RS::get_singleton()->canvas_set_modulate(get_canvas(), Color(1, 1, 1, 1));
			remove_from_group("_canvas_modulate_" + itos(get_canvas().get_id()));
		}

		update_configuration_warning();
	}
}

void CanvasModulate::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_color", "color"), &CanvasModulate::set_color);
	ClassDB::bind_method(D_METHOD("get_color"), &CanvasModulate::get_color);

	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "color"), "set_color", "get_color");
}

void CanvasModulate::set_color(const Color &p_color) {
	color = p_color;
	if (is_visible_in_tree()) {
		RS::get_singleton()->canvas_set_modulate(get_canvas(), color);
	}
}

Color CanvasModulate::get_color() const {
	return color;
}

String CanvasModulate::get_configuration_warning() const {
	if (!is_visible_in_tree() || !is_inside_tree()) {
		return String();
	}

	List<Node *> nodes;
	get_tree()->get_nodes_in_group("_canvas_modulate_" + itos(get_canvas().get_id()), &nodes);

	if (nodes.size() > 1) {
		return TTR("Only one visible CanvasModulate is allowed per scene (or set of instanced scenes). The first created one will work, while the rest will be ignored.");
	}

	return String();
}

CanvasModulate::CanvasModulate() {
	color = Color(1, 1, 1, 1);
}

CanvasModulate::~CanvasModulate() {
}