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godot/scene/gui/menu_button.cpp

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/*************************************************************************/
/* menu_button.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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 "core/os/keyboard.h"
#include "scene/main/window.h"
void MenuButton::shortcut_input(const Ref<InputEvent> &p_event) {
ERR_FAIL_COND(p_event.is_null());
if (!_is_focus_owner_in_shortcut_context()) {
return;
}
if (disable_shortcuts) {
return;
}
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) || Object::cast_to<InputEventShortcut>(*p_event))) {
if (!get_parent() || !is_visible_in_tree() || is_disabled()) {
return;
}
if (popup->activate_item_by_event(p_event, false)) {
accept_event();
}
}
}
void MenuButton::_popup_visibility_changed(bool p_visible) {
set_pressed(p_visible);
if (!p_visible) {
set_process_internal(false);
return;
}
if (switch_on_hover) {
Window *window = Object::cast_to<Window>(get_viewport());
if (window) {
mouse_pos_adjusted = window->get_position();
if (window->is_embedded()) {
Window *window_parent = Object::cast_to<Window>(window->get_parent()->get_viewport());
while (window_parent) {
if (!window_parent->is_embedded()) {
mouse_pos_adjusted += window_parent->get_position();
break;
}
window_parent = Object::cast_to<Window>(window_parent->get_parent()->get_viewport());
}
}
set_process_internal(true);
}
}
}
void MenuButton::pressed() {
if (popup->is_visible()) {
popup->hide();
return;
}
emit_signal(SNAME("about_to_popup"));
Size2 size = get_size() * get_viewport()->get_canvas_transform().get_scale();
popup->set_size(Size2(size.width, 0));
Point2 gp = get_screen_position();
gp.y += size.y;
if (is_layout_rtl()) {
gp.x += size.width - popup->get_size().width;
}
popup->set_position(gp);
popup->set_parent_rect(Rect2(Point2(gp - popup->get_position()), size));
// If not triggered by the mouse, start the popup with its first enabled item focused.
if (!_was_pressed_by_mouse()) {
for (int i = 0; i < popup->get_item_count(); i++) {
if (!popup->is_item_disabled(i)) {
popup->set_focused_item(i);
break;
}
}
}
popup->popup();
}
void MenuButton::gui_input(const Ref<InputEvent> &p_event) {
BaseButton::gui_input(p_event);
}
PopupMenu *MenuButton::get_popup() const {
return popup;
}
void MenuButton::set_switch_on_hover(bool p_enabled) {
switch_on_hover = p_enabled;
}
bool MenuButton::is_switch_on_hover() {
return switch_on_hover;
}
void MenuButton::set_item_count(int p_count) {
ERR_FAIL_COND(p_count < 0);
if (popup->get_item_count() == p_count) {
return;
}
popup->set_item_count(p_count);
notify_property_list_changed();
}
int MenuButton::get_item_count() const {
return popup->get_item_count();
}
void MenuButton::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_LAYOUT_DIRECTION_CHANGED: {
popup->set_layout_direction((Window::LayoutDirection)get_layout_direction());
} break;
case NOTIFICATION_VISIBILITY_CHANGED: {
if (!is_visible_in_tree()) {
popup->hide();
}
} break;
case NOTIFICATION_INTERNAL_PROCESS: {
Vector2i mouse_pos = DisplayServer::get_singleton()->mouse_get_position() - mouse_pos_adjusted;
MenuButton *menu_btn_other = Object::cast_to<MenuButton>(get_viewport()->gui_find_control(mouse_pos));
if (menu_btn_other && menu_btn_other != this && menu_btn_other->is_switch_on_hover() && !menu_btn_other->is_disabled() &&
(get_parent()->is_ancestor_of(menu_btn_other) || menu_btn_other->get_parent()->is_ancestor_of(popup))) {
popup->hide();
menu_btn_other->pressed();
// As the popup wasn't triggered by a mouse click, the item focus needs to be removed manually.
menu_btn_other->get_popup()->set_focused_item(-1);
}
} break;
}
}
bool MenuButton::_set(const StringName &p_name, const Variant &p_value) {
Vector<String> components = String(p_name).split("/", true, 2);
if (components.size() >= 2 && components[0] == "popup") {
bool valid;
popup->set(String(p_name).trim_prefix("popup/"), p_value, &valid);
return valid;
}
return false;
}
bool MenuButton::_get(const StringName &p_name, Variant &r_ret) const {
Vector<String> components = String(p_name).split("/", true, 2);
if (components.size() >= 2 && components[0] == "popup") {
bool valid;
r_ret = popup->get(String(p_name).trim_prefix("popup/"), &valid);
return valid;
}
return false;
}
void MenuButton::_get_property_list(List<PropertyInfo> *p_list) const {
for (int i = 0; i < popup->get_item_count(); i++) {
p_list->push_back(PropertyInfo(Variant::STRING, vformat("popup/item_%d/text", i)));
PropertyInfo pi = PropertyInfo(Variant::OBJECT, vformat("popup/item_%d/icon", i), PROPERTY_HINT_RESOURCE_TYPE, "Texture2D");
pi.usage &= ~(popup->get_item_icon(i).is_null() ? PROPERTY_USAGE_STORAGE : 0);
p_list->push_back(pi);
pi = PropertyInfo(Variant::INT, vformat("popup/item_%d/checkable", i), PROPERTY_HINT_ENUM, "No,As Checkbox,As Radio Button");
pi.usage &= ~(!popup->is_item_checkable(i) ? PROPERTY_USAGE_STORAGE : 0);
p_list->push_back(pi);
pi = PropertyInfo(Variant::BOOL, vformat("popup/item_%d/checked", i));
pi.usage &= ~(!popup->is_item_checked(i) ? PROPERTY_USAGE_STORAGE : 0);
p_list->push_back(pi);
pi = PropertyInfo(Variant::INT, vformat("popup/item_%d/id", i), PROPERTY_HINT_RANGE, "0,10,1,or_greater");
p_list->push_back(pi);
pi = PropertyInfo(Variant::BOOL, vformat("popup/item_%d/disabled", i));
pi.usage &= ~(!popup->is_item_disabled(i) ? PROPERTY_USAGE_STORAGE : 0);
p_list->push_back(pi);
pi = PropertyInfo(Variant::BOOL, vformat("popup/item_%d/separator", i));
pi.usage &= ~(!popup->is_item_separator(i) ? PROPERTY_USAGE_STORAGE : 0);
p_list->push_back(pi);
}
}
void MenuButton::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_popup"), &MenuButton::get_popup);
ClassDB::bind_method(D_METHOD("set_switch_on_hover", "enable"), &MenuButton::set_switch_on_hover);
ClassDB::bind_method(D_METHOD("is_switch_on_hover"), &MenuButton::is_switch_on_hover);
ClassDB::bind_method(D_METHOD("set_disable_shortcuts", "disabled"), &MenuButton::set_disable_shortcuts);
ClassDB::bind_method(D_METHOD("set_item_count", "count"), &MenuButton::set_item_count);
ClassDB::bind_method(D_METHOD("get_item_count"), &MenuButton::get_item_count);
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "switch_on_hover"), "set_switch_on_hover", "is_switch_on_hover");
ADD_ARRAY_COUNT("Items", "item_count", "set_item_count", "get_item_count", "popup/item_");
ADD_SIGNAL(MethodInfo("about_to_popup"));
}
void MenuButton::set_disable_shortcuts(bool p_disabled) {
disable_shortcuts = p_disabled;
}
MenuButton::MenuButton(const String &p_text) :
Button(p_text) {
set_flat(true);
set_toggle_mode(true);
set_disable_shortcuts(false);
set_process_shortcut_input(true);
set_focus_mode(FOCUS_NONE);
set_action_mode(ACTION_MODE_BUTTON_PRESS);
popup = memnew(PopupMenu);
popup->hide();
add_child(popup, false, INTERNAL_MODE_FRONT);
popup->connect("about_to_popup", callable_mp(this, &MenuButton::_popup_visibility_changed).bind(true));
popup->connect("popup_hide", callable_mp(this, &MenuButton::_popup_visibility_changed).bind(false));
}
MenuButton::~MenuButton() {
}
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