virtualx-engine/editor/settings_config_dialog.cpp
Rémi Verschelde d3c492b7d4
Merge pull request #47596 from EricEzaM/PR/fix-editor-settings-shortcuts-wrong-button-action
Fixed Editor Shortcuts revert/edit/clear buttons performing the wrong action
2021-04-10 11:04:50 +02:00

653 lines
24 KiB
C++

/*************************************************************************/
/* settings_config_dialog.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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 "settings_config_dialog.h"
#include "core/config/project_settings.h"
#include "core/input/input_map.h"
#include "core/os/keyboard.h"
#include "editor/debugger/editor_debugger_node.h"
#include "editor_file_system.h"
#include "editor_log.h"
#include "editor_node.h"
#include "editor_scale.h"
#include "editor_settings.h"
#include "scene/gui/margin_container.h"
void EditorSettingsDialog::ok_pressed() {
if (!EditorSettings::get_singleton()) {
return;
}
_settings_save();
timer->stop();
}
void EditorSettingsDialog::_settings_changed() {
timer->start();
}
void EditorSettingsDialog::_settings_property_edited(const String &p_name) {
String full_name = inspector->get_full_item_path(p_name);
if (full_name == "interface/theme/accent_color" || full_name == "interface/theme/base_color" || full_name == "interface/theme/contrast") {
EditorSettings::get_singleton()->set_manually("interface/theme/preset", "Custom"); // set preset to Custom
} else if (full_name.begins_with("text_editor/highlighting")) {
EditorSettings::get_singleton()->set_manually("text_editor/theme/color_theme", "Custom");
}
}
void EditorSettingsDialog::_settings_save() {
EditorSettings::get_singleton()->notify_changes();
EditorSettings::get_singleton()->save();
}
void EditorSettingsDialog::cancel_pressed() {
if (!EditorSettings::get_singleton()) {
return;
}
EditorSettings::get_singleton()->notify_changes();
}
void EditorSettingsDialog::popup_edit_settings() {
if (!EditorSettings::get_singleton()) {
return;
}
EditorSettings::get_singleton()->list_text_editor_themes(); // make sure we have an up to date list of themes
inspector->edit(EditorSettings::get_singleton());
inspector->get_inspector()->update_tree();
search_box->select_all();
search_box->grab_focus();
_update_shortcuts();
set_process_unhandled_input(true);
// Restore valid window bounds or pop up at default size.
Rect2 saved_size = EditorSettings::get_singleton()->get_project_metadata("dialog_bounds", "editor_settings", Rect2());
if (saved_size != Rect2()) {
popup(saved_size);
} else {
popup_centered_clamped(Size2(900, 700) * EDSCALE, 0.8);
}
_focus_current_search_box();
}
void EditorSettingsDialog::_filter_shortcuts(const String &p_filter) {
shortcut_filter = p_filter;
_update_shortcuts();
}
void EditorSettingsDialog::_undo_redo_callback(void *p_self, const String &p_name) {
EditorNode::get_log()->add_message(p_name, EditorLog::MSG_TYPE_EDITOR);
}
void EditorSettingsDialog::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_VISIBILITY_CHANGED: {
if (!is_visible()) {
EditorSettings::get_singleton()->set_project_metadata("dialog_bounds", "editor_settings", Rect2(get_position(), get_size()));
set_process_unhandled_input(false);
}
} break;
case NOTIFICATION_READY: {
undo_redo->set_method_notify_callback(EditorDebuggerNode::_method_changeds, nullptr);
undo_redo->set_property_notify_callback(EditorDebuggerNode::_property_changeds, nullptr);
undo_redo->set_commit_notify_callback(_undo_redo_callback, this);
} break;
case NOTIFICATION_ENTER_TREE: {
_update_icons();
} break;
case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
_update_icons();
// Update theme colors.
inspector->update_category_list();
_update_shortcuts();
} break;
}
}
void EditorSettingsDialog::_unhandled_input(const Ref<InputEvent> &p_event) {
ERR_FAIL_COND(p_event.is_null());
const Ref<InputEventKey> k = p_event;
if (k.is_valid() && k->is_pressed()) {
bool handled = false;
if (ED_IS_SHORTCUT("ui_undo", p_event)) {
String action = undo_redo->get_current_action_name();
if (action != "") {
EditorNode::get_log()->add_message("Undo: " + action, EditorLog::MSG_TYPE_EDITOR);
}
undo_redo->undo();
handled = true;
}
if (ED_IS_SHORTCUT("ui_redo", p_event)) {
undo_redo->redo();
String action = undo_redo->get_current_action_name();
if (action != "") {
EditorNode::get_log()->add_message("Redo: " + action, EditorLog::MSG_TYPE_EDITOR);
}
handled = true;
}
if (k->get_keycode_with_modifiers() == (KEY_MASK_CMD | KEY_F)) {
_focus_current_search_box();
handled = true;
}
if (handled) {
set_input_as_handled();
}
}
}
void EditorSettingsDialog::_update_icons() {
search_box->set_right_icon(shortcuts->get_theme_icon("Search", "EditorIcons"));
search_box->set_clear_button_enabled(true);
shortcut_search_box->set_right_icon(shortcuts->get_theme_icon("Search", "EditorIcons"));
shortcut_search_box->set_clear_button_enabled(true);
restart_close_button->set_icon(shortcuts->get_theme_icon("Close", "EditorIcons"));
restart_container->add_theme_style_override("panel", shortcuts->get_theme_stylebox("bg", "Tree"));
restart_icon->set_texture(shortcuts->get_theme_icon("StatusWarning", "EditorIcons"));
restart_label->add_theme_color_override("font_color", shortcuts->get_theme_color("warning_color", "Editor"));
}
void EditorSettingsDialog::_event_config_confirmed() {
Ref<InputEventKey> k = shortcut_editor->get_event();
if (k.is_null()) {
return;
}
if (editing_action) {
if (current_action_event_index == -1) {
// Add new event
current_action_events.push_back(k);
} else {
// Edit existing event
current_action_events[current_action_event_index] = k;
}
_update_builtin_action(current_action, current_action_events);
} else {
k = k->duplicate();
Ref<Shortcut> current_sc = EditorSettings::get_singleton()->get_shortcut(shortcut_being_edited);
undo_redo->create_action(TTR("Change Shortcut") + " '" + shortcut_being_edited + "'");
undo_redo->add_do_method(current_sc.ptr(), "set_shortcut", k);
undo_redo->add_undo_method(current_sc.ptr(), "set_shortcut", current_sc->get_shortcut());
undo_redo->add_do_method(this, "_update_shortcuts");
undo_redo->add_undo_method(this, "_update_shortcuts");
undo_redo->add_do_method(this, "_settings_changed");
undo_redo->add_undo_method(this, "_settings_changed");
undo_redo->commit_action();
}
}
void EditorSettingsDialog::_update_builtin_action(const String &p_name, const Array &p_events) {
Array old_input_array = EditorSettings::get_singleton()->get_builtin_action_overrides(current_action);
undo_redo->create_action(TTR("Edit Built-in Action"));
undo_redo->add_do_method(EditorSettings::get_singleton(), "set_builtin_action_override", p_name, p_events);
undo_redo->add_undo_method(EditorSettings::get_singleton(), "set_builtin_action_override", p_name, old_input_array);
undo_redo->add_do_method(this, "_settings_changed");
undo_redo->add_undo_method(this, "_settings_changed");
undo_redo->commit_action();
_update_shortcuts();
}
void EditorSettingsDialog::_update_shortcuts() {
// Before clearing the tree, take note of which categories are collapsed so that this state can be maintained when the tree is repopulated.
Map<String, bool> collapsed;
if (shortcuts->get_root() && shortcuts->get_root()->get_children()) {
for (TreeItem *item = shortcuts->get_root()->get_children(); item; item = item->get_next()) {
collapsed[item->get_text(0)] = item->is_collapsed();
}
}
shortcuts->clear();
TreeItem *root = shortcuts->create_item();
Map<String, TreeItem *> sections;
// Set up section for Common/Built-in actions
TreeItem *common_section = shortcuts->create_item(root);
sections["Common"] = common_section;
common_section->set_text(0, TTR("Common"));
if (collapsed.has("Common")) {
common_section->set_collapsed(collapsed["Common"]);
}
common_section->set_custom_bg_color(0, shortcuts->get_theme_color("prop_subsection", "Editor"));
common_section->set_custom_bg_color(1, shortcuts->get_theme_color("prop_subsection", "Editor"));
// Get the action map for the editor, and add each item to the "Common" section.
OrderedHashMap<StringName, InputMap::Action> action_map = InputMap::get_singleton()->get_action_map();
for (OrderedHashMap<StringName, InputMap::Action>::Element E = action_map.front(); E; E = E.next()) {
String action_name = E.key();
if (!shortcut_filter.is_subsequence_ofi(action_name)) {
continue;
}
InputMap::Action action = E.get();
Array events; // Need to get the list of events into an array so it can be set as metadata on the item.
Vector<String> event_strings;
List<Ref<InputEvent>> defaults = InputMap::get_singleton()->get_builtins().find(action_name).value();
// Remove all non-key events from the defaults.
for (List<Ref<InputEvent>>::Element *I = defaults.front(); I; I = I->next()) {
Ref<InputEventKey> k = I->get();
if (k.is_null()) {
I->erase();
}
}
bool same_as_defaults = defaults.size() == action.inputs.size(); // Initially this is set to just whether the arrays are equal. Later we check the events if needed.
int count = 0;
for (List<Ref<InputEvent>>::Element *I = action.inputs.front(); I; I = I->next()) {
// Add event and event text to respective arrays.
events.push_back(I->get());
event_strings.push_back(I->get()->as_text());
// Only check if the events have been the same so far - once one fails, we don't need to check any more.
if (same_as_defaults) {
Ref<InputEventKey> k = defaults[count];
// Only check keys, since we are in the editor.
if (k.is_valid() && !defaults[count]->shortcut_match(I->get())) {
same_as_defaults = false;
}
}
count++;
}
// Join the text of the events with a delimiter so they can all be displayed in one cell.
String events_display_string = event_strings.is_empty() ? "None" : String("; ").join(event_strings);
TreeItem *item = shortcuts->create_item(common_section);
item->set_text(0, action_name);
item->set_text(1, events_display_string);
if (!same_as_defaults) {
item->add_button(1, shortcuts->get_theme_icon("Reload", "EditorIcons"), 2);
}
if (events_display_string == "None") {
// Fade out unassigned shortcut labels for easier visual grepping.
item->set_custom_color(1, shortcuts->get_theme_color("font_color", "Label") * Color(1, 1, 1, 0.5));
}
item->add_button(1, shortcuts->get_theme_icon("Edit", "EditorIcons"), 0);
item->add_button(1, shortcuts->get_theme_icon("Close", "EditorIcons"), 1);
item->set_tooltip(0, action_name);
item->set_tooltip(1, events_display_string);
item->set_metadata(0, "Common");
item->set_metadata(1, events);
}
// Editor Shortcuts
List<String> slist;
EditorSettings::get_singleton()->get_shortcut_list(&slist);
for (List<String>::Element *E = slist.front(); E; E = E->next()) {
Ref<Shortcut> sc = EditorSettings::get_singleton()->get_shortcut(E->get());
if (!sc->has_meta("original")) {
continue;
}
Ref<InputEvent> original = sc->get_meta("original");
String section_name = E->get().get_slice("/", 0);
TreeItem *section;
if (sections.has(section_name)) {
section = sections[section_name];
} else {
section = shortcuts->create_item(root);
String item_name = section_name.capitalize();
section->set_text(0, item_name);
if (collapsed.has(item_name)) {
section->set_collapsed(collapsed[item_name]);
}
sections[section_name] = section;
section->set_custom_bg_color(0, shortcuts->get_theme_color("prop_subsection", "Editor"));
section->set_custom_bg_color(1, shortcuts->get_theme_color("prop_subsection", "Editor"));
}
// Don't match unassigned shortcuts when searching for assigned keys in search results.
// This prevents all unassigned shortcuts from appearing when searching a string like "no".
if (shortcut_filter.is_subsequence_ofi(sc->get_name()) || (sc->get_as_text() != "None" && shortcut_filter.is_subsequence_ofi(sc->get_as_text()))) {
TreeItem *item = shortcuts->create_item(section);
item->set_text(0, sc->get_name());
item->set_text(1, sc->get_as_text());
if (!sc->is_shortcut(original) && !(sc->get_shortcut().is_null() && original.is_null())) {
item->add_button(1, shortcuts->get_theme_icon("Reload", "EditorIcons"), 2);
}
if (sc->get_as_text() == "None") {
// Fade out unassigned shortcut labels for easier visual grepping.
item->set_custom_color(1, shortcuts->get_theme_color("font_color", "Label") * Color(1, 1, 1, 0.5));
}
item->add_button(1, shortcuts->get_theme_icon("Edit", "EditorIcons"), 0);
item->add_button(1, shortcuts->get_theme_icon("Close", "EditorIcons"), 1);
item->set_tooltip(0, E->get());
item->set_metadata(0, E->get());
}
}
// remove sections with no shortcuts
for (Map<String, TreeItem *>::Element *E = sections.front(); E; E = E->next()) {
TreeItem *section = E->get();
if (section->get_children() == nullptr) {
root->remove_child(section);
}
}
}
void EditorSettingsDialog::_shortcut_button_pressed(Object *p_item, int p_column, int p_idx) {
TreeItem *ti = Object::cast_to<TreeItem>(p_item);
ERR_FAIL_COND(!ti);
button_idx = p_idx;
if (ti->get_metadata(0) == "Common") {
// Editing a Built-in action, which can have multiple bindings.
editing_action = true;
current_action = ti->get_text(0);
switch (button_idx) {
case SHORTCUT_REVERT: {
Array events;
List<Ref<InputEvent>> defaults = InputMap::get_singleton()->get_builtins()[current_action];
// Convert the list to an array, and only keep key events as this is for the editor.
for (List<Ref<InputEvent>>::Element *E = defaults.front(); E; E = E->next()) {
Ref<InputEventKey> k = E->get();
if (k.is_valid()) {
events.append(E->get());
}
}
_update_builtin_action(current_action, events);
} break;
case SHORTCUT_EDIT:
case SHORTCUT_ERASE: {
// For Edit end Delete, we will show a popup which displays each event so the user can select which one to edit/delete.
current_action_events = ti->get_metadata(1);
action_popup->clear();
for (int i = 0; i < current_action_events.size(); i++) {
Ref<InputEvent> ie = current_action_events[i];
action_popup->add_item(ie->as_text());
action_popup->set_item_metadata(i, ie);
}
if (button_idx == SHORTCUT_EDIT) {
// If editing, add a button which can be used to add an additional event.
action_popup->add_icon_item(get_theme_icon("Add", "EditorIcons"), TTR("Add"));
}
action_popup->set_position(get_position() + get_mouse_position());
action_popup->take_mouse_focus();
action_popup->popup();
action_popup->set_as_minsize();
} break;
default:
break;
}
} else {
// Editing an Editor Shortcut, which can only have 1 binding.
String item = ti->get_metadata(0);
Ref<Shortcut> sc = EditorSettings::get_singleton()->get_shortcut(item);
editing_action = false;
switch (button_idx) {
case EditorSettingsDialog::SHORTCUT_EDIT:
shortcut_editor->popup_and_configure(sc->get_shortcut());
shortcut_being_edited = item;
break;
case EditorSettingsDialog::SHORTCUT_ERASE: {
if (!sc.is_valid()) {
return; //pointless, there is nothing
}
undo_redo->create_action(TTR("Erase Shortcut"));
undo_redo->add_do_method(sc.ptr(), "set_shortcut", Ref<InputEvent>());
undo_redo->add_undo_method(sc.ptr(), "set_shortcut", sc->get_shortcut());
undo_redo->add_do_method(this, "_update_shortcuts");
undo_redo->add_undo_method(this, "_update_shortcuts");
undo_redo->add_do_method(this, "_settings_changed");
undo_redo->add_undo_method(this, "_settings_changed");
undo_redo->commit_action();
} break;
case EditorSettingsDialog::SHORTCUT_REVERT: {
if (!sc.is_valid()) {
return; //pointless, there is nothing
}
Ref<InputEvent> original = sc->get_meta("original");
undo_redo->create_action(TTR("Restore Shortcut"));
undo_redo->add_do_method(sc.ptr(), "set_shortcut", original);
undo_redo->add_undo_method(sc.ptr(), "set_shortcut", sc->get_shortcut());
undo_redo->add_do_method(this, "_update_shortcuts");
undo_redo->add_undo_method(this, "_update_shortcuts");
undo_redo->add_do_method(this, "_settings_changed");
undo_redo->add_undo_method(this, "_settings_changed");
undo_redo->commit_action();
} break;
default:
break;
}
}
}
void EditorSettingsDialog::_builtin_action_popup_index_pressed(int p_index) {
switch (button_idx) {
case SHORTCUT_EDIT: {
if (p_index == action_popup->get_item_count() - 1) {
// Selected last item in list (Add button), therefore add new
current_action_event_index = -1;
shortcut_editor->popup_and_configure();
} else {
// Configure existing
current_action_event_index = p_index;
shortcut_editor->popup_and_configure(action_popup->get_item_metadata(p_index));
}
} break;
case SHORTCUT_ERASE: {
current_action_events.remove(p_index);
_update_builtin_action(current_action, current_action_events);
} break;
default:
break;
}
}
void EditorSettingsDialog::_tabs_tab_changed(int p_tab) {
_focus_current_search_box();
}
void EditorSettingsDialog::_focus_current_search_box() {
Control *tab = tabs->get_current_tab_control();
LineEdit *current_search_box = nullptr;
if (tab == tab_general) {
current_search_box = search_box;
} else if (tab == tab_shortcuts) {
current_search_box = shortcut_search_box;
}
if (current_search_box) {
current_search_box->grab_focus();
current_search_box->select_all();
}
}
void EditorSettingsDialog::_editor_restart() {
EditorNode::get_singleton()->save_all_scenes();
EditorNode::get_singleton()->restart_editor();
}
void EditorSettingsDialog::_editor_restart_request() {
restart_container->show();
}
void EditorSettingsDialog::_editor_restart_close() {
restart_container->hide();
}
void EditorSettingsDialog::_bind_methods() {
ClassDB::bind_method(D_METHOD("_unhandled_input"), &EditorSettingsDialog::_unhandled_input);
ClassDB::bind_method(D_METHOD("_update_shortcuts"), &EditorSettingsDialog::_update_shortcuts);
ClassDB::bind_method(D_METHOD("_settings_changed"), &EditorSettingsDialog::_settings_changed);
}
EditorSettingsDialog::EditorSettingsDialog() {
action_popup = memnew(PopupMenu);
action_popup->connect("index_pressed", callable_mp(this, &EditorSettingsDialog::_builtin_action_popup_index_pressed));
add_child(action_popup);
set_title(TTR("Editor Settings"));
undo_redo = memnew(UndoRedo);
tabs = memnew(TabContainer);
tabs->set_tab_align(TabContainer::ALIGN_LEFT);
tabs->connect("tab_changed", callable_mp(this, &EditorSettingsDialog::_tabs_tab_changed));
add_child(tabs);
// General Tab
tab_general = memnew(VBoxContainer);
tabs->add_child(tab_general);
tab_general->set_name(TTR("General"));
HBoxContainer *hbc = memnew(HBoxContainer);
hbc->set_h_size_flags(Control::SIZE_EXPAND_FILL);
tab_general->add_child(hbc);
search_box = memnew(LineEdit);
search_box->set_placeholder(TTR("Search"));
search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
hbc->add_child(search_box);
inspector = memnew(SectionedInspector);
inspector->get_inspector()->set_use_filter(true);
inspector->register_search_box(search_box);
inspector->set_v_size_flags(Control::SIZE_EXPAND_FILL);
inspector->get_inspector()->set_undo_redo(undo_redo);
tab_general->add_child(inspector);
inspector->get_inspector()->connect("property_edited", callable_mp(this, &EditorSettingsDialog::_settings_property_edited));
inspector->get_inspector()->connect("restart_requested", callable_mp(this, &EditorSettingsDialog::_editor_restart_request));
restart_container = memnew(PanelContainer);
tab_general->add_child(restart_container);
HBoxContainer *restart_hb = memnew(HBoxContainer);
restart_container->add_child(restart_hb);
restart_icon = memnew(TextureRect);
restart_icon->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
restart_hb->add_child(restart_icon);
restart_label = memnew(Label);
restart_label->set_text(TTR("The editor must be restarted for changes to take effect."));
restart_hb->add_child(restart_label);
restart_hb->add_spacer();
Button *restart_button = memnew(Button);
restart_button->connect("pressed", callable_mp(this, &EditorSettingsDialog::_editor_restart));
restart_hb->add_child(restart_button);
restart_button->set_text(TTR("Save & Restart"));
restart_close_button = memnew(Button);
restart_close_button->set_flat(true);
restart_close_button->connect("pressed", callable_mp(this, &EditorSettingsDialog::_editor_restart_close));
restart_hb->add_child(restart_close_button);
restart_container->hide();
// Shortcuts Tab
tab_shortcuts = memnew(VBoxContainer);
tabs->add_child(tab_shortcuts);
tab_shortcuts->set_name(TTR("Shortcuts"));
shortcut_search_box = memnew(LineEdit);
shortcut_search_box->set_placeholder(TTR("Search"));
shortcut_search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
tab_shortcuts->add_child(shortcut_search_box);
shortcut_search_box->connect("text_changed", callable_mp(this, &EditorSettingsDialog::_filter_shortcuts));
shortcuts = memnew(Tree);
shortcuts->set_v_size_flags(Control::SIZE_EXPAND_FILL);
shortcuts->set_columns(2);
shortcuts->set_hide_root(true);
shortcuts->set_column_titles_visible(true);
shortcuts->set_column_title(0, TTR("Name"));
shortcuts->set_column_title(1, TTR("Binding"));
shortcuts->connect("button_pressed", callable_mp(this, &EditorSettingsDialog::_shortcut_button_pressed));
tab_shortcuts->add_child(shortcuts);
// Adding event dialog
shortcut_editor = memnew(InputEventConfigurationDialog);
shortcut_editor->connect("confirmed", callable_mp(this, &EditorSettingsDialog::_event_config_confirmed));
shortcut_editor->set_allowed_input_types(InputEventConfigurationDialog::InputType::INPUT_KEY);
add_child(shortcut_editor);
set_hide_on_ok(true);
timer = memnew(Timer);
timer->set_wait_time(1.5);
timer->connect("timeout", callable_mp(this, &EditorSettingsDialog::_settings_save));
timer->set_one_shot(true);
add_child(timer);
EditorSettings::get_singleton()->connect("settings_changed", callable_mp(this, &EditorSettingsDialog::_settings_changed));
get_ok_button()->set_text(TTR("Close"));
updating = false;
}
EditorSettingsDialog::~EditorSettingsDialog() {
memdelete(undo_redo);
}