restore last combo box selection on focus out

desktop/src/main/java/haveno/desktop/components/AutocompleteComboBox.java

@@ -46,6 +46,7 @@ public class AutocompleteComboBox<T> extends JFXComboBox<T> {
     private List<T> matchingList;
     private JFXComboBoxListViewSkin<T> comboBoxListViewSkin;
     private boolean selectAllShortcut = false;
+    private T lastCommittedValue;
 
     public AutocompleteComboBox() {
         this(FXCollections.observableArrayList());
@@ -59,6 +60,30 @@ public class AutocompleteComboBox<T> extends JFXComboBox<T> {
         fixSpaceKey();
         setAutocompleteItems(items);
         reactToQueryChanges();
+
+        // Store last committed value so we can restore it if nothing selected
+        valueProperty().addListener((obs, oldVal, newVal) -> {
+            if (newVal != null)
+                lastCommittedValue = newVal;
+        });
+
+        // Restore last committed value when editor loses focus if no matches
+        getEditor().focusedProperty().addListener((obs, wasFocused, isNowFocused) -> {
+            if (!isNowFocused) {
+                String input = getEditor().getText();
+                T matched = getConverter().fromString(input);
+
+                boolean matchFound = getItems().stream()
+                    .anyMatch(item -> item.equals(matched));
+
+                if (!matchFound) {
+                    UserThread.execute(() -> {
+                        getSelectionModel().select(lastCommittedValue);
+                        getEditor().setText(asString(lastCommittedValue));
+                    });
+                }
+            }
+        });
     }
 
     /**
@@ -100,10 +125,16 @@ public class AutocompleteComboBox<T> extends JFXComboBox<T> {
                 return;
             }
 
-            // Case 2: fire if the text is empty to support special "show all" case
+            // Case 2: fire if the text is empty
             if (inputText.isEmpty()) {
                 eh.handle(e);
                 getParent().requestFocus();
+
+                // Restore the last committed value
+                UserThread.execute(() -> {
+                    getSelectionModel().select(lastCommittedValue);
+                    getEditor().setText(asString(lastCommittedValue));
+                });
             }
         });
     }

desktop/src/main/java/haveno/desktop/main/account/content/traditionalaccounts/TraditionalAccountsView.java

@@ -501,6 +501,8 @@ public class TraditionalAccountsView extends PaymentAccountsView<GridPane, Tradi
             }
         });
         paymentMethodComboBox.setOnChangeConfirmed(e -> {
+            if (paymentMethodComboBox.getEditor().getText().isEmpty())
+                return;
             if (paymentMethodForm != null) {
                 FormBuilder.removeRowsFromGridPane(root, 3, paymentMethodForm.getGridRow() + 1);
                 GridPane.setRowSpan(accountTitledGroupBg, paymentMethodForm.getRowSpan() + 1);

desktop/src/main/java/haveno/desktop/main/market/trades/TradesChartsView.java

@@ -116,15 +116,11 @@ public class TradesChartsView extends ActivatableViewAndModel<VBox, TradesCharts
             if (comboBox.getItems().isEmpty())
                 return null;
             if (query.isEmpty())
-                return specialShowAllItem();
+                return null;
             return comboBox.getItems().stream().
                     filter(currencyItem -> currencyItem.codeDashNameString().equals(query)).
                     findAny().orElse(null);
         }
-
-        private CurrencyListItem specialShowAllItem() {
-            return comboBox.getItems().get(0);
-        }
     }
 
     private final User user;
@@ -291,7 +287,7 @@ public class TradesChartsView extends ActivatableViewAndModel<VBox, TradesCharts
 
         currencyComboBox.setOnChangeConfirmed(e -> UserThread.execute(() -> {
             if (currencyComboBox.getEditor().getText().isEmpty())
-                currencyComboBox.getSelectionModel().select(SHOW_ALL);
+                return;
             CurrencyListItem selectedItem = currencyComboBox.getSelectionModel().getSelectedItem();
             if (selectedItem != null) {
                 model.onSetTradeCurrency(selectedItem.tradeCurrency);

desktop/src/main/java/haveno/desktop/main/offer/offerbook/OfferBookView.java

@@ -347,7 +347,7 @@ abstract public class OfferBookView<R extends GridPane, M extends OfferBookViewM
 
         currencyComboBox.setOnChangeConfirmed(e -> {
             if (currencyComboBox.getEditor().getText().isEmpty())
-                currencyComboBox.getSelectionModel().select(SHOW_ALL);
+                return;
             model.onSetTradeCurrency(currencyComboBox.getSelectionModel().getSelectedItem());
             paymentMethodComboBox.setAutocompleteItems(model.getPaymentMethods());
             model.updateSelectedPaymentMethod();
@@ -500,7 +500,7 @@ abstract public class OfferBookView<R extends GridPane, M extends OfferBookViewM
             if (comboBox.getItems().isEmpty())
                 return null;
             if (query.isEmpty())
-                return specialShowAllItem();
+                return null;
             return comboBox.getItems().stream().
                     filter(item -> asString(item).equals(query)).
                     findAny().orElse(null);