godot/scene/gui/option_button.cpp

/*************************************************************************/
/*  option_button.cpp                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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#include "option_button.h"
#include "core/print_string.h"

Size2 OptionButton::get_minimum_size() const {

	Size2 minsize = Button::get_minimum_size();

	if (has_icon("arrow"))
		minsize.width += Control::get_icon("arrow")->get_width() + get_constant("hseparation");

	return minsize;
}

void OptionButton::_notification(int p_what) {

	if (p_what == NOTIFICATION_DRAW) {

		if (!has_icon("arrow"))
			return;

		RID ci = get_canvas_item();
		Ref<Texture> arrow = Control::get_icon("arrow");
		Ref<StyleBox> normal = get_stylebox("normal");
		Color clr = Color(1, 1, 1);
		if (get_constant("modulate_arrow")) {
			switch (get_draw_mode()) {
				case DRAW_PRESSED:
					clr = get_color("font_color_pressed");
					break;
				case DRAW_HOVER:
					clr = get_color("font_color_hover");
					break;
				case DRAW_DISABLED:
					clr = get_color("font_color_disabled");
					break;
				default:
					clr = get_color("font_color");
			}
		}

		Size2 size = get_size();

		Point2 ofs(size.width - arrow->get_width() - get_constant("arrow_margin"), int(Math::abs((size.height - arrow->get_height()) / 2)));
		arrow->draw(ci, ofs, clr);
	}
}

void OptionButton::_focused(int p_which) {
	emit_signal("item_focused", p_which);
}

void OptionButton::_selected(int p_which) {

	int selid = -1;
	for (int i = 0; i < popup->get_item_count(); i++) {

		bool is_clicked = popup->get_item_id(i) == p_which;
		if (is_clicked) {
			selid = i;
			break;
		}
	}

	if (selid == -1 && p_which >= 0 && p_which < popup->get_item_count()) {
		_select(p_which, true);
	} else {

		ERR_FAIL_COND(selid == -1);

		_select(selid, true);
	}
}

void OptionButton::pressed() {

	Size2 size = get_size();
	popup->set_global_position(get_global_position() + Size2(0, size.height));
	popup->set_size(Size2(size.width, 0));

	popup->popup();
}

void OptionButton::add_icon_item(const Ref<Texture> &p_icon, const String &p_label, int p_ID) {

	popup->add_icon_radio_check_item(p_icon, p_label, p_ID);
	if (popup->get_item_count() == 1)
		select(0);
}
void OptionButton::add_item(const String &p_label, int p_ID) {

	popup->add_radio_check_item(p_label, p_ID);
	if (popup->get_item_count() == 1)
		select(0);
}

void OptionButton::set_item_text(int p_idx, const String &p_text) {

	popup->set_item_text(p_idx, p_text);
}
void OptionButton::set_item_icon(int p_idx, const Ref<Texture> &p_icon) {

	popup->set_item_icon(p_idx, p_icon);
}
void OptionButton::set_item_id(int p_idx, int p_ID) {

	popup->set_item_id(p_idx, p_ID);
}

void OptionButton::set_item_metadata(int p_idx, const Variant &p_metadata) {

	popup->set_item_metadata(p_idx, p_metadata);
}

void OptionButton::set_item_disabled(int p_idx, bool p_disabled) {

	popup->set_item_disabled(p_idx, p_disabled);
}

String OptionButton::get_item_text(int p_idx) const {

	return popup->get_item_text(p_idx);
}

Ref<Texture> OptionButton::get_item_icon(int p_idx) const {

	return popup->get_item_icon(p_idx);
}

int OptionButton::get_item_id(int p_idx) const {

	return popup->get_item_id(p_idx);
}
Variant OptionButton::get_item_metadata(int p_idx) const {

	return popup->get_item_metadata(p_idx);
}

bool OptionButton::is_item_disabled(int p_idx) const {

	return popup->is_item_disabled(p_idx);
}

int OptionButton::get_item_count() const {

	return popup->get_item_count();
}

void OptionButton::add_separator() {

	popup->add_separator();
}

void OptionButton::clear() {

	popup->clear();
	set_text("");
	current = -1;
}

void OptionButton::_select(int p_which, bool p_emit) {

	if (p_which < 0)
		return;
	if (p_which == current)
		return;

	ERR_FAIL_INDEX(p_which, popup->get_item_count());

	for (int i = 0; i < popup->get_item_count(); i++) {

		popup->set_item_checked(i, i == p_which);
	}

	current = p_which;
	set_text(popup->get_item_text(current));
	set_icon(popup->get_item_icon(current));

	if (is_inside_tree() && p_emit)
		emit_signal("item_selected", current);
}

void OptionButton::_select_int(int p_which) {

	if (p_which < 0 || p_which >= popup->get_item_count())
		return;
	_select(p_which, false);
}

void OptionButton::select(int p_idx) {

	_select(p_idx, false);
}

int OptionButton::get_selected() const {

	return current;
}

int OptionButton::get_selected_id() const {

	int idx = get_selected();
	if (idx < 0)
		return 0;
	return get_item_id(current);
}
Variant OptionButton::get_selected_metadata() const {

	int idx = get_selected();
	if (idx < 0)
		return Variant();
	return get_item_metadata(current);
}

void OptionButton::remove_item(int p_idx) {

	popup->remove_item(p_idx);
}

PopupMenu *OptionButton::get_popup() const {

	return popup;
}

Array OptionButton::_get_items() const {

	Array items;
	for (int i = 0; i < get_item_count(); i++) {

		items.push_back(get_item_text(i));
		items.push_back(get_item_icon(i));
		items.push_back(is_item_disabled(i));
		items.push_back(get_item_id(i));
		items.push_back(get_item_metadata(i));
	}

	return items;
}
void OptionButton::_set_items(const Array &p_items) {

	ERR_FAIL_COND(p_items.size() % 5);
	clear();

	for (int i = 0; i < p_items.size(); i += 5) {

		String text = p_items[i + 0];
		Ref<Texture> icon = p_items[i + 1];
		bool disabled = p_items[i + 2];
		int id = p_items[i + 3];
		Variant meta = p_items[i + 4];

		int idx = get_item_count();
		add_item(text, id);
		set_item_icon(idx, icon);
		set_item_disabled(idx, disabled);
		set_item_metadata(idx, meta);
	}
}

void OptionButton::get_translatable_strings(List<String> *p_strings) const {

	return popup->get_translatable_strings(p_strings);
}

void OptionButton::_bind_methods() {

	ClassDB::bind_method(D_METHOD("_selected"), &OptionButton::_selected);
	ClassDB::bind_method(D_METHOD("_focused"), &OptionButton::_focused);

	ClassDB::bind_method(D_METHOD("add_item", "label", "id"), &OptionButton::add_item, DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("add_icon_item", "texture", "label", "id"), &OptionButton::add_icon_item, DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("set_item_text", "idx", "text"), &OptionButton::set_item_text);
	ClassDB::bind_method(D_METHOD("set_item_icon", "idx", "texture"), &OptionButton::set_item_icon);
	ClassDB::bind_method(D_METHOD("set_item_disabled", "idx", "disabled"), &OptionButton::set_item_disabled);
	ClassDB::bind_method(D_METHOD("set_item_id", "idx", "id"), &OptionButton::set_item_id);
	ClassDB::bind_method(D_METHOD("set_item_metadata", "idx", "metadata"), &OptionButton::set_item_metadata);
	ClassDB::bind_method(D_METHOD("get_item_text", "idx"), &OptionButton::get_item_text);
	ClassDB::bind_method(D_METHOD("get_item_icon", "idx"), &OptionButton::get_item_icon);
	ClassDB::bind_method(D_METHOD("get_item_id", "idx"), &OptionButton::get_item_id);
	ClassDB::bind_method(D_METHOD("get_item_metadata", "idx"), &OptionButton::get_item_metadata);
	ClassDB::bind_method(D_METHOD("is_item_disabled", "idx"), &OptionButton::is_item_disabled);
	ClassDB::bind_method(D_METHOD("get_item_count"), &OptionButton::get_item_count);
	ClassDB::bind_method(D_METHOD("add_separator"), &OptionButton::add_separator);
	ClassDB::bind_method(D_METHOD("clear"), &OptionButton::clear);
	ClassDB::bind_method(D_METHOD("select", "idx"), &OptionButton::select);
	ClassDB::bind_method(D_METHOD("get_selected"), &OptionButton::get_selected);
	ClassDB::bind_method(D_METHOD("get_selected_id"), &OptionButton::get_selected_id);
	ClassDB::bind_method(D_METHOD("get_selected_metadata"), &OptionButton::get_selected_metadata);
	ClassDB::bind_method(D_METHOD("remove_item", "idx"), &OptionButton::remove_item);
	ClassDB::bind_method(D_METHOD("_select_int"), &OptionButton::_select_int);

	ClassDB::bind_method(D_METHOD("get_popup"), &OptionButton::get_popup);

	ClassDB::bind_method(D_METHOD("_set_items"), &OptionButton::_set_items);
	ClassDB::bind_method(D_METHOD("_get_items"), &OptionButton::_get_items);

	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "items", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "_set_items", "_get_items");
	// "selected" property must come after "items", otherwise GH-10213 occurs
	ADD_PROPERTY(PropertyInfo(Variant::INT, "selected"), "_select_int", "get_selected");
	ADD_SIGNAL(MethodInfo("item_selected", PropertyInfo(Variant::INT, "ID")));
	ADD_SIGNAL(MethodInfo("item_focused", PropertyInfo(Variant::INT, "ID")));
}

OptionButton::OptionButton() {

	current = -1;
	set_text_align(ALIGN_LEFT);
	set_action_mode(ACTION_MODE_BUTTON_PRESS);

	popup = memnew(PopupMenu);
	popup->hide();
	add_child(popup);
	popup->set_as_toplevel(true);
	popup->set_pass_on_modal_close_click(false);
	popup->connect("id_pressed", this, "_selected");
	popup->connect("id_focused", this, "_focused");
}

OptionButton::~OptionButton() {
}