src/view/pages/signal_reducing.rs

@@ -178,12 +178,31 @@ pub fn signal_reducing_page(wrapper: &Box) {
         .vexpand(true)
         .build();
 
-    calculate_button.connect_clicked(move |_| match parse_fields(all_inputs.clone()) {
+    calculate_button.connect_clicked(clone!(
+        #[strong]
+        model_for_events,
+        move |_| match parse_fields(all_inputs.clone()) {
             Ok(results) => {
                 values.set(results);
 
-            model_for_events.items_changed(0, 0, 18);
-            model_for_events.items_changed(18, 18, 0);
+                let new_elem = &Frequency::new(values.get().frequency);
+
+                let exist_elem_pos = model_for_events.find_with_equal_func(|elem| {
+                    elem.downcast_ref::<Frequency>().unwrap().frequency() == new_elem.frequency()
+                });
+
+                match exist_elem_pos {
+                    Some(_) => {
+                        info_bar.set_text_label(Some("Данная частота уже была задана."));
+                        info_bar.show_infobar(5u64);
+                    }
+                    None => {
+                        model_for_events.append(&Frequency::new(values.get().frequency));
+
+                        model_for_events.items_changed(0, 0, 1);
+                        model_for_events.items_changed(1, 1, 0);
+                    }
+                }
             }
             Err(error) => {
                 let error_kind: Option<&str> = get_error_message(error);
@@ -191,7 +210,8 @@ pub fn signal_reducing_page(wrapper: &Box) {
                 info_bar.set_text_label(error_kind);
                 info_bar.show_infobar(5u64);
             }
-    });
+        }
+    ));
 
     wrapper.append(&input_block);
     wrapper.append(&calculate_button);