godot/scene/gui/menu_button.cpp

/*************************************************************************/
/*  menu_button.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 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 "menu_button.h"
#include "os/keyboard.h"
#include "scene/main/viewport.h"

void MenuButton::_unhandled_key_input(Ref<InputEvent> p_event) {

	if (p_event->is_pressed() && !p_event->is_echo() && (Object::cast_to<InputEventKey>(p_event.ptr()) || Object::cast_to<InputEventJoypadButton>(p_event.ptr()) || Object::cast_to<InputEventAction>(*p_event))) {

		if (!get_parent() || !is_visible_in_tree() || is_disabled())
			return;

		bool global_only = (get_viewport()->get_modal_stack_top() && !get_viewport()->get_modal_stack_top()->is_a_parent_of(this));

		if (popup->activate_item_by_event(p_event, global_only))
			accept_event();
	}
}

void MenuButton::pressed() {

	emit_signal("about_to_show");
	Size2 size = get_size();

	Point2 gp = get_global_position();
	popup->set_global_position(gp + Size2(0, size.height));
	popup->set_size(Size2(size.width, 0));
	popup->set_parent_rect(Rect2(Point2(gp - popup->get_global_position()), get_size()));
	popup->popup();
	popup->set_invalidate_click_until_motion();
}

void MenuButton::_gui_input(Ref<InputEvent> p_event) {

	/*if (p_event.type==InputEvent::MOUSE_BUTTON && p_event->get_button_index()==BUTTON_LEFT) {
		clicked=p_event->is_pressed();
	}
	if (clicked && p_event.type==InputEvent::MOUSE_MOTION && popup->is_visible_in_tree()) {

		Point2 gt = Point2(p_event.mouse_motion.x,p_event.mouse_motion.y);
		gt = get_global_transform().xform(gt);
		Point2 lt = popup->get_transform().affine_inverse().xform(gt);
		if (popup->has_point(lt)) {
			//print_line("HAS POINT!!!");
			popup->call_deferred("grab_click_focus");
		}

	}*/

	BaseButton::_gui_input(p_event);
}

PopupMenu *MenuButton::get_popup() {

	return popup;
}

Array MenuButton::_get_items() const {

	return popup->get("items");
}
void MenuButton::_set_items(const Array &p_items) {

	popup->set("items", p_items);
}

void MenuButton::_bind_methods() {

	ClassDB::bind_method(D_METHOD("get_popup"), &MenuButton::get_popup);
	ClassDB::bind_method(D_METHOD("_unhandled_key_input"), &MenuButton::_unhandled_key_input);
	ClassDB::bind_method(D_METHOD("_set_items"), &MenuButton::_set_items);
	ClassDB::bind_method(D_METHOD("_get_items"), &MenuButton::_get_items);

	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "items", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "_set_items", "_get_items");

	ADD_SIGNAL(MethodInfo("about_to_show"));
}
MenuButton::MenuButton() {

	set_flat(true);
	set_enabled_focus_mode(FOCUS_NONE);
	popup = memnew(PopupMenu);
	popup->hide();
	add_child(popup);
	popup->set_as_toplevel(true);
	connect("button_up", popup, "call_deferred", make_binds("grab_click_focus"));
	set_process_unhandled_key_input(true);
	set_action_mode(ACTION_MODE_BUTTON_PRESS);
}

MenuButton::~MenuButton() {
}