better handling of server connection editing

src/main/java/com/sparrowwallet/sparrow/AppController.java

@@ -532,6 +532,14 @@ public class AppController implements Initializable {
         return onlineProperty.get();
     }
 
+    public void connect() {
+        serverToggle.selectedProperty().set(true);
+    }
+
+    public void disconnect() {
+        serverToggle.selectedProperty().set(false);
+    }
+
     public static BooleanProperty onlineProperty() { return onlineProperty; }
 
     public static Integer getCurrentBlockHeight() {
@@ -1214,4 +1222,14 @@ public class AppController implements Initializable {
     public void requestQRScan(RequestQRScanEvent event) {
         openTransactionFromQR(null);
     }
+
+    @Subscribe
+    public void requestConnect(RequestConnectEvent event) {
+        connect();
+    }
+
+    @Subscribe
+    public void requestDisconnect(RequestDisconnectEvent event) {
+        disconnect();
+    }
 }

src/main/java/com/sparrowwallet/sparrow/event/RequestConnectEvent.java

@@ -0,0 +1,5 @@
+package com.sparrowwallet.sparrow.event;
+
+public class RequestConnectEvent {
+    //Empty event class used to request programmatic connection to the server
+}

src/main/java/com/sparrowwallet/sparrow/event/RequestDisconnectEvent.java

@@ -0,0 +1,5 @@
+package com.sparrowwallet.sparrow.event;
+
+public class RequestDisconnectEvent {
+    //Empty event class used to request programmatic disconnection from the server
+}

src/main/java/com/sparrowwallet/sparrow/preferences/PreferencesDialog.java

@@ -1,7 +1,10 @@
 package com.sparrowwallet.sparrow.preferences;
 
 import com.sparrowwallet.sparrow.AppController;
+import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.RequestConnectEvent;
 import com.sparrowwallet.sparrow.io.Config;
+import com.sparrowwallet.sparrow.net.ElectrumServer;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.control.ButtonBar;
 import javafx.scene.control.ButtonType;
@@ -12,6 +15,8 @@ import org.controlsfx.tools.Borders;
 import java.io.IOException;
 
 public class PreferencesDialog extends Dialog<Boolean> {
+    private final boolean existingConnection;
+
     public PreferencesDialog() {
         this(null);
     }
@@ -45,6 +50,13 @@ public class PreferencesDialog extends Dialog<Boolean> {
             dialogPane.setPrefWidth(650);
             dialogPane.setPrefHeight(500);
 
+            existingConnection = ElectrumServer.isConnected();
+            setOnCloseRequest(event -> {
+                if(existingConnection && !ElectrumServer.isConnected()) {
+                    EventManager.get().post(new RequestConnectEvent());
+                }
+            });
+
             setResultConverter(dialogButton -> dialogButton == newWalletButtonType ? Boolean.TRUE : null);
         } catch(IOException e) {
             throw new RuntimeException(e);

src/main/java/com/sparrowwallet/sparrow/preferences/ServerPreferencesController.java

@@ -1,9 +1,11 @@
 package com.sparrowwallet.sparrow.preferences;
 
 import com.google.common.net.HostAndPort;
+import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.TextFieldValidator;
 import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch;
 import com.sparrowwallet.sparrow.event.ConnectionEvent;
+import com.sparrowwallet.sparrow.event.RequestDisconnectEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.net.ElectrumServer;
@@ -61,6 +63,9 @@ public class ServerPreferencesController extends PreferencesDetailController {
     @FXML
     private Button testConnection;
 
+    @FXML
+    private Button editConnection;
+
     @FXML
     private TextArea testResults;
 
@@ -125,33 +130,36 @@ public class ServerPreferencesController extends PreferencesDetailController {
             }
         });
 
-        testConnection.setDisable(ElectrumServer.isConnected());
+        boolean isConnected = ElectrumServer.isConnected();
+        setFieldsEditable(!isConnected);
+
+        testConnection.managedProperty().bind(testConnection.visibleProperty());
+        testConnection.setVisible(!isConnected);
         testConnection.setOnAction(event -> {
             testResults.setText("Connecting to " + config.getElectrumServer() + "...");
             testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.ELLIPSIS_H, null));
 
-            boolean existingConnection = ElectrumServer.isConnected();
-            if(existingConnection) {
-                ElectrumServer.ServerBannerService serverBannerService = new ElectrumServer.ServerBannerService();
-                serverBannerService.setOnSucceeded(successEvent -> {
-                    showConnectionSuccess(null, serverBannerService.getValue());
-                });
-                serverBannerService.setOnFailed(this::showConnectionFailure);
-                serverBannerService.start();
-            } else {
-                ElectrumServer.ConnectionService connectionService = new ElectrumServer.ConnectionService(false);
-                connectionService.setPeriod(Duration.minutes(1));
-                connectionService.setOnSucceeded(successEvent -> {
-                    ConnectionEvent connectionEvent = (ConnectionEvent)connectionService.getValue();
-                    showConnectionSuccess(connectionEvent.getServerVersion(), connectionEvent.getServerBanner());
-                    connectionService.cancel();
-                });
-                connectionService.setOnFailed(workerStateEvent -> {
-                    showConnectionFailure(workerStateEvent);
-                    connectionService.cancel();
-                });
-                connectionService.start();
-            }
+            ElectrumServer.ConnectionService connectionService = new ElectrumServer.ConnectionService(false);
+            connectionService.setPeriod(Duration.minutes(1));
+            connectionService.setOnSucceeded(successEvent -> {
+                ConnectionEvent connectionEvent = (ConnectionEvent)connectionService.getValue();
+                showConnectionSuccess(connectionEvent.getServerVersion(), connectionEvent.getServerBanner());
+                connectionService.cancel();
+            });
+            connectionService.setOnFailed(workerStateEvent -> {
+                showConnectionFailure(workerStateEvent);
+                connectionService.cancel();
+            });
+            connectionService.start();
+        });
+
+        editConnection.managedProperty().bind(editConnection.visibleProperty());
+        editConnection.setVisible(isConnected);
+        editConnection.setOnAction(event -> {
+            EventManager.get().post(new RequestDisconnectEvent());
+            setFieldsEditable(true);
+            editConnection.setVisible(false);
+            testConnection.setVisible(true);
         });
 
         String electrumServer = config.getElectrumServer();
@@ -196,6 +204,17 @@ public class ServerPreferencesController extends PreferencesDetailController {
         }
     }
 
+    private void setFieldsEditable(boolean editable) {
+        host.setEditable(editable);
+        port.setEditable(editable);
+        useSsl.setDisable(!editable);
+        certificate.setEditable(editable);
+        certificateSelect.setDisable(!editable);
+        useProxy.setDisable(!editable);
+        proxyHost.setEditable(editable);
+        proxyPort.setEditable(editable);
+    }
+
     private void showConnectionSuccess(List<String> serverVersion, String serverBanner) {
         testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.CHECK_CIRCLE, Color.rgb(80, 161, 79)));
         if(serverVersion != null) {

src/main/resources/com/sparrowwallet/sparrow/preferences/server.fxml

@@ -59,6 +59,11 @@
                 <Glyph fontFamily="FontAwesome" icon="QUESTION_CIRCLE" prefWidth="13" />
             </graphic>
         </Button>
+        <Button fx:id="editConnection" graphicTextGap="5" text="Edit Existing Connection">
+            <graphic>
+                <Glyph fontFamily="FontAwesome" icon="EDIT" prefWidth="15" />
+            </graphic>
+        </Button>
     </StackPane>
 
     <StackPane GridPane.columnIndex="0" GridPane.rowIndex="2">