diff --git a/source/libublsettings-gtk3.c b/source/libublsettings-gtk3.c
index 5a8bb57..45c1551 100644
--- a/source/libublsettings-gtk3.c
+++ b/source/libublsettings-gtk3.c
@@ -586,7 +586,8 @@ int yon_gtk_combo_box_text_find(GtkWidget *combo_box, char *text_to_find){
     } return -1;
 }
 
-void _yon_gtk_column_minimal_fixed_size_set(GtkTreeViewColumn *column){
+gboolean _yon_gtk_column_minimal_fixed_size_set(GtkTreeViewColumn *column){
+    g_return_val_if_fail(GTK_IS_TREE_VIEW_COLUMN(column),0);
     const gchar *title = gtk_tree_view_column_get_title(column);
     GtkWidget *label = gtk_label_new(title);
     int header_width = 0;
@@ -594,7 +595,6 @@ void _yon_gtk_column_minimal_fixed_size_set(GtkTreeViewColumn *column){
 
     if (layout != NULL) {
         pango_layout_get_pixel_size(layout, &header_width, NULL);
-        g_object_unref(layout);
     }
     if (GTK_IS_WIDGET(label)) {
         g_object_ref_sink(label);
@@ -602,13 +602,19 @@ void _yon_gtk_column_minimal_fixed_size_set(GtkTreeViewColumn *column){
 
     gtk_tree_view_column_set_min_width(column, header_width+10);
     g_object_unref(label);
+    return G_SOURCE_REMOVE;
+}
+
+void yon_gtk_tree_view_column_minimal_fixed_size_set(GtkTreeViewColumn *column){
+    _yon_gtk_column_minimal_fixed_size_set(column);
 }
 
 void _yon_gtk_tree_view_minimal_fixed_size_set_full(GtkTreeView *tree){
     GList *list = gtk_tree_view_get_columns(tree);
     for (int i=0;i<g_list_length(list);i++){
-        _yon_gtk_column_minimal_fixed_size_set((GtkTreeViewColumn*)g_list_nth_data(list,i));
+        gdk_threads_add_idle((GSourceFunc)_yon_gtk_column_minimal_fixed_size_set,(GtkTreeViewColumn*)g_list_nth_data(list,i));
     }
+    g_list_free(list);
 }
 
 void yon_gtk_tree_view_minimal_fixed_size_set_full(GtkTreeView *tree){
@@ -1214,6 +1220,32 @@ void yon_on_text_insert_only_digits(GtkEditable *editable, const gchar *text, gi
     g_free(new_text);
 }
 
+void yon_on_insert_restricted_check(GtkEditable *editable, const gchar *text, gint length, gint *position, gpointer){
+        gchar *new_text = g_new(gchar, length + 1);
+    gint i, j = 0;
+
+    for (i = 0; i < length; i++) {
+        if (text[i]!='!'&&text[i]!='@'&&text[i]!='#'&&text[i]!='%'&&text[i]!='^'&&text[i]!='&'&&text[i]!='*'&&text[i]!='\"'&&text[i]!='\'') {
+            new_text[j] = text[i];
+            j++;
+        }
+    }
+
+    if (j < length) {
+        g_signal_handlers_block_by_func(editable, G_CALLBACK(yon_on_insert_restricted_check), NULL);
+        gtk_editable_insert_text(editable, new_text, j, position);
+        g_signal_handlers_unblock_by_func(editable, G_CALLBACK(yon_on_insert_restricted_check), NULL);
+        g_signal_stop_emission_by_name(editable, "insert-text");
+    }
+
+    g_free(new_text);
+}
+
+void yon_gtk_entry_block_restricted_symbols(GtkEntry *target){
+    g_return_if_fail(GTK_IS_ENTRY(target));
+    g_signal_connect(G_OBJECT(target),"insert-text",G_CALLBACK(yon_on_insert_restricted_check),NULL);
+}
+
 // GtkEntry section
 // struct entry_pattern_data {
 //     GtkEntry *entry;
@@ -1461,4 +1493,45 @@ config_str yon_resource_open_file(const char *path, int *size){
     parsed = yon_char_parse(modules,size,"\n");
     return parsed;
 }
+
+// dictionary *__yon_config_listeners = NULL;
+// typedef struct {
+//     GtkWidget *target;
+//     char *widget_parameter;
+//     void *check_function;
+//     char *parameter;
+//     char *save_command;
+// } config_listener;
+
+// void __yon_gtk_config_activated(GtkWidget *, config_listener *current){
+//     char *parameter;
+
+//     if (((int (*)(char*, GtkWidget*, char*))(current->check_function))(parameter,current->target, current->parameter)) {
+//     }
+
+// }
+
+// int yon_gtk_config_add_listener (GtkWidget *target, char *parameter, char *save_command,int(check_function)(char*,GtkWidget*,char*)){
+//     if (__yon_config_listeners){
+//         dictionary *dict;
+//         for_dictionaries(dict,__yon_config_listeners){
+//             if (target==((config_listener*)dict->data)->target){
+//                 return 0;
+//             }
+//         }
+//     }
+//     config_listener *current = malloc(sizeof(config_listener));
+//     current->target=target;
+//     current->parameter = parameter;
+//     current->save_command = save_command;
+//     current->check_function = (void*)check_function;
+//     if (GTK_IS_TOGGLE_BUTTON(target)){
+//         g_signal_connect(G_OBJECT(target),"toggled",C_CALLBACK(__yon_gtk_config_activated),current);
+
+//     }
+
+//     yon_dictionary_add_or_create_if_exists_with_data(__yon_config_listeners,NULL,current);
+//     return 0;
+// }
+
 #endif
\ No newline at end of file
diff --git a/source/libublsettings-gtk3.h b/source/libublsettings-gtk3.h
index a01f7d3..bce6787 100644
--- a/source/libublsettings-gtk3.h
+++ b/source/libublsettings-gtk3.h
@@ -215,6 +215,8 @@ int yon_gtk_combo_box_fill(GtkWidget *combo, char **parameters,int size);
 */
 int yon_gtk_combo_box_text_find(GtkWidget *combo_box, char *text_to_find);
 
+void yon_gtk_tree_view_column_minimal_fixed_size_set(GtkTreeViewColumn *column);
+
 /**yon_gtk_tree_view_minimal_fixed_size_set_full(GtkTreeView *tree)
  * [EN]
  * 
@@ -485,6 +487,8 @@ void yon_gtk_entry_set_password_visibility_icon(GtkEntry *target);
 
 void yon_on_text_insert_only_digits(GtkEditable *editable, const gchar *text, gint length, gint *position, gpointer user_data);
 
+void yon_gtk_entry_block_restricted_symbols(GtkEntry *target);
+
 // GtkTreeStore section
 
 dictionary *yon_gtk_tree_store_get_children(GtkTreeStore *tree, GtkTreeIter *parent,int column);