Zero initialize all pointer class and struct members

This prevents the pitfall of UB when checking if they have been
assigned something valid by comparing to nullptr.

9 files changed, 181 insertions, 181 deletions

diff --git a/editor/plugins/tiles/atlas_merging_dialog.h b/editor/plugins/tiles/atlas_merging_dialog.h
index 6cf555247d..9502d93f6b 100644
--- a/editor/plugins/tiles/atlas_merging_dialog.h
+++ b/editor/plugins/tiles/atlas_merging_dialog.h
@@ -49,19 +49,19 @@ private:
 	LocalVector<Map<Vector2i, Vector2i>> merged_mapping;
 	Ref<TileSet> tile_set;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	// Settings.
 	int next_line_after_column = 30;
 
 	// GUI.
-	ItemList *atlas_merging_atlases_list;
-	EditorPropertyVector2i *texture_region_size_editor_property;
-	EditorPropertyInteger *columns_editor_property;
-	TextureRect *preview;
-	Label *select_2_atlases_label;
-	EditorFileDialog *editor_file_dialog;
-	Button *merge_button;
+	ItemList *atlas_merging_atlases_list = nullptr;
+	EditorPropertyVector2i *texture_region_size_editor_property = nullptr;
+	EditorPropertyInteger *columns_editor_property = nullptr;
+	TextureRect *preview = nullptr;
+	Label *select_2_atlases_label = nullptr;
+	EditorFileDialog *editor_file_dialog = nullptr;
+	Button *merge_button = nullptr;
 
 	void _property_changed(const StringName &p_property, const Variant &p_value, const String &p_field, bool p_changing);
 
diff --git a/editor/plugins/tiles/tile_atlas_view.h b/editor/plugins/tiles/tile_atlas_view.h
index caf3ef9e4b..6e74858b08 100644
--- a/editor/plugins/tiles/tile_atlas_view.h
+++ b/editor/plugins/tiles/tile_atlas_view.h
@@ -45,8 +45,8 @@ class TileAtlasView : public Control {
 	GDCLASS(TileAtlasView, Control);
 
 private:
-	TileSet *tile_set;
-	TileSetAtlasSource *tile_set_atlas_source;
+	TileSet *tile_set = nullptr;
+	TileSetAtlasSource *tile_set_atlas_source = nullptr;
 	int source_id = TileSet::INVALID_SOURCE;
 
 	enum DragType {
@@ -55,9 +55,9 @@ private:
 	};
 	DragType drag_type = DRAG_TYPE_NONE;
 	float previous_zoom = 1.0;
-	EditorZoomWidget *zoom_widget;
-	Button *button_center_view;
-	CenterContainer *center_container;
+	EditorZoomWidget *zoom_widget = nullptr;
+	Button *button_center_view = nullptr;
+	CenterContainer *center_container = nullptr;
 	Vector2 panning;
 	void _update_zoom_and_panning(bool p_zoom_on_mouse_pos = false);
 	void _zoom_widget_changed();
@@ -72,41 +72,41 @@ private:
 	Map<Vector2, Map<int, Rect2i>> alternative_tiles_rect_cache;
 	void _update_alternative_tiles_rect_cache();
 
-	MarginContainer *margin_container;
+	MarginContainer *margin_container = nullptr;
 	int margin_container_paddings[4] = { 0, 0, 0, 0 };
-	HBoxContainer *hbox;
-	Label *missing_source_label;
+	HBoxContainer *hbox = nullptr;
+	Label *missing_source_label = nullptr;
 
 	// Background
-	Control *background_left;
+	Control *background_left = nullptr;
 	void _draw_background_left();
-	Control *background_right;
+	Control *background_right = nullptr;
 	void _draw_background_right();
 
 	// Left side.
-	Control *base_tiles_root_control;
+	Control *base_tiles_root_control = nullptr;
 	void _base_tiles_root_control_gui_input(const Ref<InputEvent> &p_event);
 
-	Control *base_tiles_drawing_root;
+	Control *base_tiles_drawing_root = nullptr;
 
-	Control *base_tiles_draw;
+	Control *base_tiles_draw = nullptr;
 	void _draw_base_tiles();
 
-	Control *base_tiles_texture_grid;
+	Control *base_tiles_texture_grid = nullptr;
 	void _draw_base_tiles_texture_grid();
 
-	Control *base_tiles_shape_grid;
+	Control *base_tiles_shape_grid = nullptr;
 	void _draw_base_tiles_shape_grid();
 
 	Size2i _compute_base_tiles_control_size();
 
 	// Right side.
-	Control *alternative_tiles_root_control;
+	Control *alternative_tiles_root_control = nullptr;
 	void _alternative_tiles_root_control_gui_input(const Ref<InputEvent> &p_event);
 
-	Control *alternative_tiles_drawing_root;
+	Control *alternative_tiles_drawing_root = nullptr;
 
-	Control *alternatives_draw;
+	Control *alternatives_draw = nullptr;
 	void _draw_alternatives();
 
 	Size2i _compute_alternative_tiles_control_size();
diff --git a/editor/plugins/tiles/tile_data_editors.h b/editor/plugins/tiles/tile_data_editors.h
index 99724760a7..3ac9eacb05 100644
--- a/editor/plugins/tiles/tile_data_editors.h
+++ b/editor/plugins/tiles/tile_data_editors.h
@@ -93,7 +93,7 @@ private:
 	bool multiple_polygon_mode = false;
 
 	bool use_undo_redo = true;
-	UndoRedo *editor_undo_redo;
+	UndoRedo *editor_undo_redo = nullptr;
 
 	// UI
 	int hovered_polygon_index = -1;
@@ -113,20 +113,20 @@ private:
 	Vector2 drag_last_pos;
 	PackedVector2Array drag_old_polygon;
 
-	HBoxContainer *toolbar;
+	HBoxContainer *toolbar = nullptr;
 	Ref<ButtonGroup> tools_button_group;
-	Button *button_create;
-	Button *button_edit;
-	Button *button_delete;
-	Button *button_pixel_snap;
-	MenuButton *button_advanced_menu;
+	Button *button_create = nullptr;
+	Button *button_edit = nullptr;
+	Button *button_delete = nullptr;
+	Button *button_pixel_snap = nullptr;
+	MenuButton *button_advanced_menu = nullptr;
 
 	Vector<Point2> in_creation_polygon;
 
-	Panel *panel;
-	Control *base_control;
-	EditorZoomWidget *editor_zoom_widget;
-	Button *button_center_view;
+	Panel *panel = nullptr;
+	Control *base_control = nullptr;
+	EditorZoomWidget *editor_zoom_widget = nullptr;
+	Button *button_center_view = nullptr;
 	Vector2 panning;
 
 	Ref<Texture2D> background_texture;
@@ -188,12 +188,12 @@ class TileDataDefaultEditor : public TileDataEditor {
 private:
 	// Toolbar
 	HBoxContainer *toolbar = memnew(HBoxContainer);
-	Button *picker_button;
+	Button *picker_button = nullptr;
 
 	// UI
 	Ref<Texture2D> tile_bool_checked;
 	Ref<Texture2D> tile_bool_unchecked;
-	Label *label;
+	Label *label = nullptr;
 
 	EditorProperty *property_editor = nullptr;
 
@@ -214,7 +214,7 @@ private:
 protected:
 	DummyObject *dummy_object = memnew(DummyObject);
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	StringName type;
 	String property;
@@ -268,7 +268,7 @@ private:
 	int occlusion_layer = -1;
 
 	// UI
-	GenericTilePolygonEditor *polygon_editor;
+	GenericTilePolygonEditor *polygon_editor = nullptr;
 
 	void _polygon_changed(PackedVector2Array p_polygon);
 
@@ -279,7 +279,7 @@ private:
 	virtual void _setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, Map<TileMapCell, Variant> p_previous_values, Variant p_new_value) override;
 
 protected:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	virtual void _tile_set_changed() override;
 
@@ -299,7 +299,7 @@ class TileDataCollisionEditor : public TileDataDefaultEditor {
 	int physics_layer = -1;
 
 	// UI
-	GenericTilePolygonEditor *polygon_editor;
+	GenericTilePolygonEditor *polygon_editor = nullptr;
 	DummyObject *dummy_object = memnew(DummyObject);
 	Map<StringName, EditorProperty *> property_editors;
 
@@ -314,7 +314,7 @@ class TileDataCollisionEditor : public TileDataDefaultEditor {
 	virtual void _setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, Map<TileMapCell, Variant> p_previous_values, Variant p_new_value) override;
 
 protected:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	virtual void _tile_set_changed() override;
 
@@ -335,7 +335,7 @@ class TileDataTerrainsEditor : public TileDataEditor {
 private:
 	// Toolbar
 	HBoxContainer *toolbar = memnew(HBoxContainer);
-	Button *picker_button;
+	Button *picker_button = nullptr;
 
 	// Painting state.
 	enum DragType {
@@ -352,7 +352,7 @@ private:
 	Variant drag_painted_value;
 
 	// UI
-	Label *label;
+	Label *label = nullptr;
 	DummyObject *dummy_object = memnew(DummyObject);
 	EditorPropertyEnum *terrain_set_property_editor = nullptr;
 	EditorPropertyEnum *terrain_property_editor = nullptr;
@@ -366,7 +366,7 @@ protected:
 
 	void _notification(int p_what);
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 public:
 	virtual Control *get_toolbar() override { return toolbar; };
@@ -388,7 +388,7 @@ private:
 	PackedVector2Array navigation_polygon;
 
 	// UI
-	GenericTilePolygonEditor *polygon_editor;
+	GenericTilePolygonEditor *polygon_editor = nullptr;
 
 	void _polygon_changed(PackedVector2Array p_polygon);
 
@@ -399,7 +399,7 @@ private:
 	virtual void _setup_undo_redo_action(TileSetAtlasSource *p_tile_set_atlas_source, Map<TileMapCell, Variant> p_previous_values, Variant p_new_value) override;
 
 protected:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	virtual void _tile_set_changed() override;
 
diff --git a/editor/plugins/tiles/tile_map_editor.h b/editor/plugins/tiles/tile_map_editor.h
index d09061015f..3a0293f48f 100644
--- a/editor/plugins/tiles/tile_map_editor.h
+++ b/editor/plugins/tiles/tile_map_editor.h
@@ -51,8 +51,8 @@ class UndoRedo;
 class TileMapEditorPlugin : public Object {
 public:
 	struct TabData {
-		Control *toolbar;
-		Control *panel;
+		Control *toolbar = nullptr;
+		Control *panel = nullptr;
 	};
 
 	virtual Vector<TabData> get_tabs() const {
@@ -69,33 +69,33 @@ class TileMapEditorTilesPlugin : public TileMapEditorPlugin {
 	GDCLASS(TileMapEditorTilesPlugin, TileMapEditorPlugin);
 
 private:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 	ObjectID tile_map_id;
 	int tile_map_layer = -1;
 	virtual void edit(ObjectID p_tile_map_id, int p_tile_map_layer) override;
 
 	///// Toolbar /////
-	HBoxContainer *toolbar;
+	HBoxContainer *toolbar = nullptr;
 
 	Ref<ButtonGroup> tool_buttons_group;
-	Button *select_tool_button;
-	Button *paint_tool_button;
-	Button *line_tool_button;
-	Button *rect_tool_button;
-	Button *bucket_tool_button;
+	Button *select_tool_button = nullptr;
+	Button *paint_tool_button = nullptr;
+	Button *line_tool_button = nullptr;
+	Button *rect_tool_button = nullptr;
+	Button *bucket_tool_button = nullptr;
 
-	HBoxContainer *tools_settings;
+	HBoxContainer *tools_settings = nullptr;
 
-	VSeparator *tools_settings_vsep;
-	Button *picker_button;
-	Button *erase_button;
+	VSeparator *tools_settings_vsep = nullptr;
+	Button *picker_button = nullptr;
+	Button *erase_button = nullptr;
 
-	VSeparator *tools_settings_vsep_2;
-	CheckBox *bucket_contiguous_checkbox;
-	CheckBox *random_tile_checkbox;
+	VSeparator *tools_settings_vsep_2 = nullptr;
+	CheckBox *bucket_contiguous_checkbox = nullptr;
+	CheckBox *random_tile_checkbox = nullptr;
 	float scattering = 0.0;
-	Label *scatter_label;
-	SpinBox *scatter_spinbox;
+	Label *scatter_label = nullptr;
+	SpinBox *scatter_spinbox = nullptr;
 	void _on_random_tile_checkbox_toggled(bool p_pressed);
 	void _on_scattering_spinbox_changed(double p_value);
 
@@ -148,12 +148,12 @@ private:
 	void _tab_changed();
 
 	///// Bottom panel tiles ////
-	VBoxContainer *tiles_bottom_panel;
-	Label *missing_source_label;
-	Label *invalid_source_label;
+	VBoxContainer *tiles_bottom_panel = nullptr;
+	Label *missing_source_label = nullptr;
+	Label *invalid_source_label = nullptr;
 
-	ItemList *sources_list;
-	MenuButton *source_sort_button;
+	ItemList *sources_list = nullptr;
+	MenuButton *source_sort_button = nullptr;
 
 	Ref<Texture2D> missing_atlas_texture_icon;
 	void _update_tile_set_sources_list();
@@ -162,18 +162,18 @@ private:
 
 	// Atlas sources.
 	TileMapCell hovered_tile;
-	TileAtlasView *tile_atlas_view;
-	HSplitContainer *atlas_sources_split_container;
+	TileAtlasView *tile_atlas_view = nullptr;
+	HSplitContainer *atlas_sources_split_container = nullptr;
 
 	bool tile_set_dragging_selection = false;
 	Vector2i tile_set_drag_start_mouse_pos;
 
-	Control *tile_atlas_control;
+	Control *tile_atlas_control = nullptr;
 	void _tile_atlas_control_mouse_exited();
 	void _tile_atlas_control_gui_input(const Ref<InputEvent> &p_event);
 	void _tile_atlas_control_draw();
 
-	Control *alternative_tiles_control;
+	Control *alternative_tiles_control = nullptr;
 	void _tile_alternatives_control_draw();
 	void _tile_alternatives_control_mouse_exited();
 	void _tile_alternatives_control_gui_input(const Ref<InputEvent> &p_event);
@@ -182,7 +182,7 @@ private:
 	void _set_source_sort(int p_sort);
 
 	// Scenes collection sources.
-	ItemList *scene_tiles_list;
+	ItemList *scene_tiles_list = nullptr;
 
 	void _update_scenes_collection_view();
 	void _scene_thumbnail_done(const String &p_path, const Ref<Texture2D> &p_preview, const Ref<Texture2D> &p_small_preview, Variant p_ud);
@@ -190,9 +190,9 @@ private:
 	void _scenes_list_nothing_selected();
 
 	///// Bottom panel patterns ////
-	VBoxContainer *patterns_bottom_panel;
-	ItemList *patterns_item_list;
-	Label *patterns_help_label;
+	VBoxContainer *patterns_bottom_panel = nullptr;
+	ItemList *patterns_item_list = nullptr;
+	Label *patterns_help_label = nullptr;
 	void _patterns_item_list_gui_input(const Ref<InputEvent> &p_event);
 	void _pattern_preview_done(Ref<TileMapPattern> p_pattern, Ref<Texture2D> p_texture);
 	bool select_last_pattern = false;
@@ -220,32 +220,32 @@ class TileMapEditorTerrainsPlugin : public TileMapEditorPlugin {
 	GDCLASS(TileMapEditorTerrainsPlugin, TileMapEditorPlugin);
 
 private:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 	ObjectID tile_map_id;
 	int tile_map_layer = -1;
 	virtual void edit(ObjectID p_tile_map_id, int p_tile_map_layer) override;
 
 	// Toolbar.
-	HBoxContainer *toolbar;
+	HBoxContainer *toolbar = nullptr;
 
 	Ref<ButtonGroup> tool_buttons_group;
-	Button *paint_tool_button;
-	Button *line_tool_button;
-	Button *rect_tool_button;
-	Button *bucket_tool_button;
+	Button *paint_tool_button = nullptr;
+	Button *line_tool_button = nullptr;
+	Button *rect_tool_button = nullptr;
+	Button *bucket_tool_button = nullptr;
 
-	HBoxContainer *tools_settings;
+	HBoxContainer *tools_settings = nullptr;
 
-	VSeparator *tools_settings_vsep;
-	Button *picker_button;
-	Button *erase_button;
+	VSeparator *tools_settings_vsep = nullptr;
+	Button *picker_button = nullptr;
+	Button *erase_button = nullptr;
 
-	VSeparator *tools_settings_vsep_2;
-	CheckBox *bucket_contiguous_checkbox;
+	VSeparator *tools_settings_vsep_2 = nullptr;
+	CheckBox *bucket_contiguous_checkbox = nullptr;
 	void _update_toolbar();
 
 	// Main vbox.
-	VBoxContainer *main_vbox_container;
+	VBoxContainer *main_vbox_container = nullptr;
 
 	// TileMap editing.
 	bool has_mouse = false;
@@ -278,8 +278,8 @@ private:
 	void _update_selection();
 
 	// Bottom panel.
-	Tree *terrains_tree;
-	ItemList *terrains_tile_list;
+	Tree *terrains_tree = nullptr;
+	ItemList *terrains_tile_list = nullptr;
 
 	// Cache.
 	LocalVector<LocalVector<Set<TileSet::TerrainsPattern>>> per_terrain_terrains_patterns;
@@ -306,7 +306,7 @@ class TileMapEditor : public VBoxContainer {
 	GDCLASS(TileMapEditor, VBoxContainer);
 
 private:
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 	bool tileset_changed_needs_update = false;
 	ObjectID tile_map_id;
 	int tile_map_layer = -1;
@@ -315,24 +315,24 @@ private:
 	Vector<TileMapEditorPlugin *> tile_map_editor_plugins;
 
 	// Toolbar.
-	HBoxContainer *tile_map_toolbar;
+	HBoxContainer *tile_map_toolbar = nullptr;
 
-	PopupMenu *layers_selection_popup;
-	Button *layers_selection_button;
-	Button *toogle_highlight_selected_layer_button;
+	PopupMenu *layers_selection_popup = nullptr;
+	Button *layers_selection_button = nullptr;
+	Button *toogle_highlight_selected_layer_button = nullptr;
 	void _layers_selection_button_draw();
 	void _layers_selection_button_pressed();
 	void _layers_selection_id_pressed(int p_id);
 
-	Button *toggle_grid_button;
+	Button *toggle_grid_button = nullptr;
 	void _on_grid_toggled(bool p_pressed);
 
-	MenuButton *advanced_menu_button;
+	MenuButton *advanced_menu_button = nullptr;
 	void _advanced_menu_button_id_pressed(int p_id);
 
 	// Bottom panel.
-	Label *missing_tileset_label;
-	TabBar *tabs_bar;
+	Label *missing_tileset_label = nullptr;
+	TabBar *tabs_bar = nullptr;
 	LocalVector<TileMapEditorPlugin::TabData> tabs_data;
 	LocalVector<TileMapEditorPlugin *> tabs_plugins;
 	void _update_bottom_panel();
diff --git a/editor/plugins/tiles/tile_proxies_manager_dialog.h b/editor/plugins/tiles/tile_proxies_manager_dialog.h
index 3f1461391e..00866544be 100644
--- a/editor/plugins/tiles/tile_proxies_manager_dialog.h
+++ b/editor/plugins/tiles/tile_proxies_manager_dialog.h
@@ -43,24 +43,24 @@ private:
 	int commited_actions_count = 0;
 	Ref<TileSet> tile_set;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	TileMapCell from;
 	TileMapCell to;
 
 	// GUI
-	ItemList *source_level_list;
-	ItemList *coords_level_list;
-	ItemList *alternative_level_list;
+	ItemList *source_level_list = nullptr;
+	ItemList *coords_level_list = nullptr;
+	ItemList *alternative_level_list = nullptr;
 
-	EditorPropertyInteger *source_from_property_editor;
-	EditorPropertyVector2i *coords_from_property_editor;
-	EditorPropertyInteger *alternative_from_property_editor;
-	EditorPropertyInteger *source_to_property_editor;
-	EditorPropertyVector2i *coords_to_property_editor;
-	EditorPropertyInteger *alternative_to_property_editor;
+	EditorPropertyInteger *source_from_property_editor = nullptr;
+	EditorPropertyVector2i *coords_from_property_editor = nullptr;
+	EditorPropertyInteger *alternative_from_property_editor = nullptr;
+	EditorPropertyInteger *source_to_property_editor = nullptr;
+	EditorPropertyVector2i *coords_to_property_editor = nullptr;
+	EditorPropertyInteger *alternative_to_property_editor = nullptr;
 
-	PopupMenu *popup_menu;
+	PopupMenu *popup_menu = nullptr;
 	void _right_clicked(int p_item, Vector2 p_local_mouse_pos, Object *p_item_list);
 	void _menu_id_pressed(int p_id);
 	void _delete_selected_bindings();
diff --git a/editor/plugins/tiles/tile_set_atlas_source_editor.h b/editor/plugins/tiles/tile_set_atlas_source_editor.h
index 4a90b821f8..b26b7edbfa 100644
--- a/editor/plugins/tiles/tile_set_atlas_source_editor.h
+++ b/editor/plugins/tiles/tile_set_atlas_source_editor.h
@@ -85,7 +85,7 @@ public:
 		GDCLASS(AtlasTileProxyObject, Object);
 
 	private:
-		TileSetAtlasSourceEditor *tiles_set_atlas_source_editor;
+		TileSetAtlasSourceEditor *tiles_set_atlas_source_editor = nullptr;
 
 		TileSetAtlasSource *tile_set_atlas_source = nullptr;
 		Set<TileSelection> tiles = Set<TileSelection>();
@@ -114,16 +114,16 @@ private:
 	TileSetAtlasSource *tile_set_atlas_source = nullptr;
 	int tile_set_atlas_source_id = TileSet::INVALID_SOURCE;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	bool tile_set_changed_needs_update = false;
 
 	// -- Properties painting --
-	VBoxContainer *tile_data_painting_editor_container;
-	Label *tile_data_editors_label;
-	Button *tile_data_editor_dropdown_button;
-	Popup *tile_data_editors_popup;
-	Tree *tile_data_editors_tree;
+	VBoxContainer *tile_data_painting_editor_container = nullptr;
+	Label *tile_data_editors_label = nullptr;
+	Button *tile_data_editor_dropdown_button = nullptr;
+	Popup *tile_data_editors_popup = nullptr;
+	Tree *tile_data_editors_tree = nullptr;
 	void _tile_data_editor_dropdown_button_draw();
 	void _tile_data_editor_dropdown_button_pressed();
 
@@ -135,21 +135,21 @@ private:
 	void _tile_data_editors_tree_selected();
 
 	// -- Inspector --
-	AtlasTileProxyObject *tile_proxy_object;
-	Label *tile_inspector_label;
-	EditorInspector *tile_inspector;
-	Label *tile_inspector_no_tile_selected_label;
+	AtlasTileProxyObject *tile_proxy_object = nullptr;
+	Label *tile_inspector_label = nullptr;
+	EditorInspector *tile_inspector = nullptr;
+	Label *tile_inspector_no_tile_selected_label = nullptr;
 	String selected_property;
 	void _inspector_property_selected(String p_property);
 
-	TileSetAtlasSourceProxyObject *atlas_source_proxy_object;
-	Label *atlas_source_inspector_label;
-	EditorInspector *atlas_source_inspector;
+	TileSetAtlasSourceProxyObject *atlas_source_proxy_object = nullptr;
+	Label *atlas_source_inspector_label = nullptr;
+	EditorInspector *atlas_source_inspector = nullptr;
 
 	// -- Atlas view --
-	HBoxContainer *toolbox;
-	Label *tile_atlas_view_missing_source_label;
-	TileAtlasView *tile_atlas_view;
+	HBoxContainer *toolbox = nullptr;
+	Label *tile_atlas_view_missing_source_label = nullptr;
+	TileAtlasView *tile_atlas_view = nullptr;
 
 	// Dragging
 	enum DragType {
@@ -202,17 +202,17 @@ private:
 
 	// Tool buttons.
 	Ref<ButtonGroup> tools_button_group;
-	Button *tool_setup_atlas_source_button;
-	Button *tool_select_button;
-	Button *tool_paint_button;
-	Label *tool_tile_id_label;
+	Button *tool_setup_atlas_source_button = nullptr;
+	Button *tool_select_button = nullptr;
+	Button *tool_paint_button = nullptr;
+	Label *tool_tile_id_label = nullptr;
 
 	// Tool settings.
-	HBoxContainer *tool_settings;
-	VSeparator *tool_settings_vsep;
-	HBoxContainer *tool_settings_tile_data_toolbar_container;
-	Button *tools_settings_erase_button;
-	MenuButton *tool_advanced_menu_buttom;
+	HBoxContainer *tool_settings = nullptr;
+	VSeparator *tool_settings_vsep = nullptr;
+	HBoxContainer *tool_settings_tile_data_toolbar_container = nullptr;
+	Button *tools_settings_erase_button = nullptr;
+	MenuButton *tool_advanced_menu_buttom = nullptr;
 
 	// Selection.
 	Set<TileSelection> selection;
@@ -223,12 +223,12 @@ private:
 	// A control on the tile atlas to draw and handle input events.
 	Vector2i hovered_base_tile_coords = TileSetSource::INVALID_ATLAS_COORDS;
 
-	PopupMenu *base_tile_popup_menu;
-	PopupMenu *empty_base_tile_popup_menu;
+	PopupMenu *base_tile_popup_menu = nullptr;
+	PopupMenu *empty_base_tile_popup_menu = nullptr;
 	Ref<Texture2D> resize_handle;
 	Ref<Texture2D> resize_handle_disabled;
-	Control *tile_atlas_control;
-	Control *tile_atlas_control_unscaled;
+	Control *tile_atlas_control = nullptr;
+	Control *tile_atlas_control_unscaled = nullptr;
 	void _tile_atlas_control_draw();
 	void _tile_atlas_control_unscaled_draw();
 	void _tile_atlas_control_mouse_exited();
@@ -238,9 +238,9 @@ private:
 	// A control over the alternative tiles.
 	Vector3i hovered_alternative_tile_coords = Vector3i(TileSetSource::INVALID_ATLAS_COORDS.x, TileSetSource::INVALID_ATLAS_COORDS.y, TileSetSource::INVALID_TILE_ALTERNATIVE);
 
-	PopupMenu *alternative_tile_popup_menu;
-	Control *alternative_tiles_control;
-	Control *alternative_tiles_control_unscaled;
+	PopupMenu *alternative_tile_popup_menu = nullptr;
+	Control *alternative_tiles_control = nullptr;
+	Control *alternative_tiles_control_unscaled = nullptr;
 	void _tile_alternatives_control_draw();
 	void _tile_alternatives_control_unscaled_draw();
 	void _tile_alternatives_control_mouse_exited();
@@ -264,7 +264,7 @@ private:
 	// -- Misc --
 	void _auto_create_tiles();
 	void _auto_remove_tiles();
-	AcceptDialog *confirm_auto_create_tiles;
+	AcceptDialog *confirm_auto_create_tiles = nullptr;
 
 	void _tile_set_changed();
 	void _tile_proxy_object_changed(String p_what);
@@ -293,7 +293,7 @@ class EditorPropertyTilePolygon : public EditorProperty {
 
 	void _add_focusable_children(Node *p_node);
 
-	GenericTilePolygonEditor *generic_tile_polygon_editor;
+	GenericTilePolygonEditor *generic_tile_polygon_editor = nullptr;
 	void _polygons_changed();
 
 public:
diff --git a/editor/plugins/tiles/tile_set_editor.h b/editor/plugins/tiles/tile_set_editor.h
index b79b37cf2e..e633de37b0 100644
--- a/editor/plugins/tiles/tile_set_editor.h
+++ b/editor/plugins/tiles/tile_set_editor.h
@@ -47,18 +47,18 @@ class TileSetEditor : public VBoxContainer {
 private:
 	Ref<TileSet> tile_set;
 	bool tile_set_changed_needs_update = false;
-	HSplitContainer *split_container;
+	HSplitContainer *split_container = nullptr;
 
 	// TabBar.
-	HBoxContainer *tile_set_toolbar;
-	TabBar *tabs_bar;
+	HBoxContainer *tile_set_toolbar = nullptr;
+	TabBar *tabs_bar = nullptr;
 
 	// Tiles.
-	Label *no_source_selected_label;
-	TileSetAtlasSourceEditor *tile_set_atlas_source_editor;
-	TileSetScenesCollectionSourceEditor *tile_set_scenes_collection_source_editor;
+	Label *no_source_selected_label = nullptr;
+	TileSetAtlasSourceEditor *tile_set_atlas_source_editor = nullptr;
+	TileSetScenesCollectionSourceEditor *tile_set_scenes_collection_source_editor = nullptr;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	void _drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);
 	bool _can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
@@ -66,11 +66,11 @@ private:
 	void _update_sources_list(int force_selected_id = -1);
 
 	// Sources management.
-	Button *sources_delete_button;
-	MenuButton *sources_add_button;
-	MenuButton *source_sort_button;
-	MenuButton *sources_advanced_menu_button;
-	ItemList *sources_list;
+	Button *sources_delete_button = nullptr;
+	MenuButton *sources_add_button = nullptr;
+	MenuButton *source_sort_button = nullptr;
+	MenuButton *sources_advanced_menu_button = nullptr;
+	ItemList *sources_list = nullptr;
 	Ref<Texture2D> missing_texture_texture;
 	void _source_selected(int p_source_index);
 	void _source_delete_pressed();
@@ -78,12 +78,12 @@ private:
 	void _sources_advanced_menu_id_pressed(int p_id_pressed);
 	void _set_source_sort(int p_sort);
 
-	AtlasMergingDialog *atlas_merging_dialog;
-	TileProxiesManagerDialog *tile_proxies_manager_dialog;
+	AtlasMergingDialog *atlas_merging_dialog = nullptr;
+	TileProxiesManagerDialog *tile_proxies_manager_dialog = nullptr;
 
 	// Patterns.
-	ItemList *patterns_item_list;
-	Label *patterns_help_label;
+	ItemList *patterns_item_list = nullptr;
+	Label *patterns_help_label = nullptr;
 	void _patterns_item_list_gui_input(const Ref<InputEvent> &p_event);
 	void _pattern_preview_done(Ref<TileMapPattern> p_pattern, Ref<Texture2D> p_texture);
 	bool select_last_pattern = false;
diff --git a/editor/plugins/tiles/tile_set_scenes_collection_source_editor.h b/editor/plugins/tiles/tile_set_scenes_collection_source_editor.h
index 8904e8524a..657bfca032 100644
--- a/editor/plugins/tiles/tile_set_scenes_collection_source_editor.h
+++ b/editor/plugins/tiles/tile_set_scenes_collection_source_editor.h
@@ -70,7 +70,7 @@ private:
 		GDCLASS(SceneTileProxyObject, Object);
 
 	private:
-		TileSetScenesCollectionSourceEditor *tile_set_scenes_collection_source_editor;
+		TileSetScenesCollectionSourceEditor *tile_set_scenes_collection_source_editor = nullptr;
 
 		TileSetScenesCollectionSource *tile_set_scenes_collection_source = nullptr;
 		int source_id;
@@ -97,23 +97,23 @@ private:
 	TileSetScenesCollectionSource *tile_set_scenes_collection_source = nullptr;
 	int tile_set_source_id = -1;
 
-	UndoRedo *undo_redo;
+	UndoRedo *undo_redo = nullptr;
 
 	bool tile_set_scenes_collection_source_changed_needs_update = false;
 
 	// Source inspector.
-	TileSetScenesCollectionProxyObject *scenes_collection_source_proxy_object;
-	Label *scenes_collection_source_inspector_label;
-	EditorInspector *scenes_collection_source_inspector;
+	TileSetScenesCollectionProxyObject *scenes_collection_source_proxy_object = nullptr;
+	Label *scenes_collection_source_inspector_label = nullptr;
+	EditorInspector *scenes_collection_source_inspector = nullptr;
 
 	// Tile inspector.
-	SceneTileProxyObject *tile_proxy_object;
-	Label *tile_inspector_label;
-	EditorInspector *tile_inspector;
+	SceneTileProxyObject *tile_proxy_object = nullptr;
+	Label *tile_inspector_label = nullptr;
+	EditorInspector *tile_inspector = nullptr;
 
-	ItemList *scene_tiles_list;
-	Button *scene_tile_add_button;
-	Button *scene_tile_delete_button;
+	ItemList *scene_tiles_list = nullptr;
+	Button *scene_tile_add_button = nullptr;
+	Button *scene_tile_delete_button = nullptr;
 
 	void _tile_set_scenes_collection_source_changed();
 	void _scenes_collection_source_proxy_object_changed(String p_what);
diff --git a/editor/plugins/tiles/tiles_editor_plugin.h b/editor/plugins/tiles/tiles_editor_plugin.h
index eeff4da4e9..a22e782b34 100644
--- a/editor/plugins/tiles/tiles_editor_plugin.h
+++ b/editor/plugins/tiles/tiles_editor_plugin.h
@@ -57,11 +57,11 @@ private:
 	ObjectID tile_map_id;
 	Ref<TileSet> tile_set;
 
-	Button *tilemap_editor_button;
-	TileMapEditor *tilemap_editor;
+	Button *tilemap_editor_button = nullptr;
+	TileMapEditor *tilemap_editor = nullptr;
 
-	Button *tileset_editor_button;
-	TileSetEditor *tileset_editor;
+	Button *tileset_editor_button = nullptr;
+	TileSetEditor *tileset_editor = nullptr;
 
 	void _update_editors();