Add toggle for hidden file visibility in FileDialog

scene/gui/file_dialog.cpp

@@ -48,8 +48,9 @@ void FileDialog::_notification(int p_what) {
 
 	if (p_what == NOTIFICATION_ENTER_TREE) {
 
-		refresh->set_icon(get_icon("reload"));
 		dir_up->set_icon(get_icon("parent_folder"));
+		refresh->set_icon(get_icon("reload"));
+		show_hidden->set_icon(get_icon("toggle_hidden"));
 	}
 
 	if (p_what == NOTIFICATION_POPUP_HIDE) {
@@ -393,20 +394,19 @@ void FileDialog::update_file_list() {
 	List<String> files;
 	List<String> dirs;
 
-	bool isdir;
-	bool ishidden;
-	bool show_hidden = show_hidden_files;
+	bool is_dir;
+	bool is_hidden;
 	String item;
 
-	while ((item = dir_access->get_next(&isdir)) != "") {
+	while ((item = dir_access->get_next(&is_dir)) != "") {
 
 		if (item == "." || item == "..")
 			continue;
 
-		ishidden = dir_access->current_is_hidden();
+		is_hidden = dir_access->current_is_hidden();
 
-		if (show_hidden || !ishidden) {
-			if (!isdir)
+		if (show_hidden_files || !is_hidden) {
+			if (!is_dir)
 				files.push_back(item);
 			else
 				dirs.push_back(item);
@@ -873,6 +873,13 @@ FileDialog::FileDialog() {
 	refresh->connect("pressed", this, "_update_file_list");
 	hbc->add_child(refresh);
 
+	show_hidden = memnew(ToolButton);
+	show_hidden->set_toggle_mode(true);
+	show_hidden->set_pressed(is_showing_hidden_files());
+	show_hidden->set_tooltip(RTR("Toggle Hidden Files"));
+	show_hidden->connect("toggled", this, "set_show_hidden_files");
+	hbc->add_child(show_hidden);
+
 	drives = memnew(OptionButton);
 	hbc->add_child(drives);
 	drives->connect("item_selected", this, "_select_drive");

scene/gui/file_dialog.h

@@ -90,6 +90,7 @@ private:
 	ToolButton *dir_up;
 
 	ToolButton *refresh;
+	ToolButton *show_hidden;
 
 	Vector<String> filters;
 

scene/resources/default_theme/default_theme.cpp

@@ -541,8 +541,9 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 
 	// File Dialog
 
-	theme->set_icon("reload", "FileDialog", make_icon(icon_reload_png));
 	theme->set_icon("parent_folder", "FileDialog", make_icon(icon_parent_folder_png));
+	theme->set_icon("reload", "FileDialog", make_icon(icon_reload_png));
+	theme->set_icon("toggle_hidden", "FileDialog", make_icon(icon_visibility_png));
 
 	// Popup