preferences update

src/main/java/com/sparrowwallet/sparrow/control/HelpLabel.java

@@ -0,0 +1,45 @@
+package com.sparrowwallet.sparrow.control;
+
+import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+import javafx.scene.control.Label;
+import javafx.scene.control.Tooltip;
+import org.controlsfx.glyphfont.Glyph;
+
+public class HelpLabel extends Label {
+    private final Tooltip tooltip;
+
+    public HelpLabel() {
+        super("", getHelpGlyph());
+        tooltip = new Tooltip();
+        tooltip.textProperty().bind(helpTextProperty());
+        setTooltip(tooltip);
+        getStyleClass().add("help-label");
+    }
+
+    private static Glyph getHelpGlyph() {
+        Glyph lockGlyph = new Glyph("Font Awesome 5 Free Solid", FontAwesome5.Glyph.QUESTION_CIRCLE);
+        lockGlyph.getStyleClass().add("help-icon");
+        lockGlyph.setFontSize(12);
+        return lockGlyph;
+    }
+
+    public final StringProperty helpTextProperty() {
+        if(helpText == null) {
+            helpText = new SimpleStringProperty(this, "helpText", "");
+        }
+
+        return helpText;
+    }
+
+    private StringProperty helpText;
+
+    public final void setHelpText(String value) {
+        helpTextProperty().setValue(value);
+    }
+
+    public final String getHelpText() {
+        return helpText == null ? "" : helpText.getValue();
+    }
+}

src/main/java/com/sparrowwallet/sparrow/io/ElectrumServer.java

@@ -116,6 +116,15 @@ public class ElectrumServer {
         return client.createRequest().returnAs(BlockHeaderTip.class).method("blockchain.headers.subscribe").id(1).execute();
     }
 
+    public static synchronized boolean isConnected() {
+        if(transport != null) {
+            TcpTransport tcpTransport = (TcpTransport)transport;
+            return tcpTransport.isConnected();
+        }
+
+        return false;
+    }
+
     public static synchronized void closeActiveConnection() throws ServerException {
         try {
             if(transport != null) {
@@ -572,6 +581,10 @@ public class ElectrumServer {
         public String hex;
 
         public BlockHeader getBlockHeader() {
+            if(hex == null) {
+                return null;
+            }
+
             byte[] blockHeaderBytes = Utils.hexToBytes(hex);
             return new BlockHeader(blockHeaderBytes);
         }
@@ -715,6 +728,10 @@ public class ElectrumServer {
             }
         }
 
+        public boolean isConnected() {
+            return socket != null && running;
+        }
+
         protected Socket createSocket() throws IOException {
             return socketFactory.createSocket(server.getHost(), server.getPortOrDefault(DEFAULT_PORT));
         }
@@ -832,11 +849,20 @@ public class ElectrumServer {
     public static class ConnectionService extends ScheduledService<FeeRatesUpdatedEvent> implements Thread.UncaughtExceptionHandler {
         private static final int FEE_RATES_PERIOD = 5 * 60 * 1000;
 
+        private final boolean subscribe;
         private boolean firstCall = true;
         private Thread reader;
         private Throwable lastReaderException;
         private long feeRatesRetrievedAt;
 
+        public ConnectionService() {
+            this(true);
+        }
+
+        public ConnectionService(boolean subscribe) {
+            this.subscribe = subscribe;
+        }
+
         @Override
         protected Task<FeeRatesUpdatedEvent> createTask() {
             return new Task<>() {
@@ -853,7 +879,13 @@ public class ElectrumServer {
                         List<String> serverVersion = electrumServer.getServerVersion();
                         firstCall = false;
 
-                        BlockHeaderTip tip = electrumServer.subscribeBlockHeaders();
+                        BlockHeaderTip tip;
+                        if(subscribe) {
+                            tip = electrumServer.subscribeBlockHeaders();
+                        } else {
+                            tip = new BlockHeaderTip();
+                        }
+
                         String banner = electrumServer.getServerBanner();
 
                         Map<Integer, Double> blockTargetFeeRates = electrumServer.getFeeEstimates(SendController.TARGET_BLOCKS_RANGE);

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

@@ -2,6 +2,7 @@ package com.sparrowwallet.sparrow.preferences;
 
 import com.sparrowwallet.drongo.BitcoinUnit;
 import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch;
 import com.sparrowwallet.sparrow.event.BitcoinUnitChangedEvent;
 import com.sparrowwallet.sparrow.event.FiatCurrencySelectedEvent;
 import com.sparrowwallet.sparrow.io.Config;
@@ -24,6 +25,12 @@ public class GeneralPreferencesController extends PreferencesDetailController {
     @FXML
     private ComboBox<ExchangeSource> exchangeSource;
 
+    @FXML
+    private UnlabeledToggleSwitch groupByAddress;
+
+    @FXML
+    private UnlabeledToggleSwitch includeMempoolChange;
+
     private final ChangeListener<Currency> fiatCurrencyListener = new ChangeListener<Currency>() {
         @Override
         public void changed(ObservableValue<? extends Currency> observable, Currency oldValue, Currency newValue) {
@@ -58,6 +65,15 @@ public class GeneralPreferencesController extends PreferencesDetailController {
         });
 
         updateCurrencies(exchangeSource.getSelectionModel().getSelectedItem());
+
+        groupByAddress.setSelected(config.isGroupByAddress());
+        includeMempoolChange.setSelected(config.isIncludeMempoolChange());
+        groupByAddress.selectedProperty().addListener((observableValue, oldValue, newValue) -> {
+            config.setGroupByAddress(newValue);
+        });
+        includeMempoolChange.selectedProperty().addListener((observableValue, oldValue, newValue) -> {
+            config.setIncludeMempoolChange(newValue);
+        });
     }
 
     private void updateCurrencies(ExchangeSource exchangeSource) {

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

@@ -3,12 +3,13 @@ package com.sparrowwallet.sparrow.preferences;
 import com.google.common.net.HostAndPort;
 import com.sparrowwallet.sparrow.control.TextFieldValidator;
 import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch;
+import com.sparrowwallet.sparrow.event.ConnectionEvent;
 import com.sparrowwallet.sparrow.glyphfont.FontAwesome5;
 import com.sparrowwallet.sparrow.io.Config;
 import com.sparrowwallet.sparrow.io.ElectrumServer;
-import com.sparrowwallet.sparrow.io.ServerException;
 import javafx.application.Platform;
 import javafx.beans.value.ChangeListener;
+import javafx.concurrent.WorkerStateEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
 import javafx.scene.control.Control;
@@ -17,6 +18,7 @@ import javafx.scene.control.TextField;
 import javafx.scene.paint.Color;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
+import javafx.util.Duration;
 import org.controlsfx.glyphfont.Glyph;
 import org.controlsfx.validation.ValidationResult;
 import org.controlsfx.validation.ValidationSupport;
@@ -123,40 +125,31 @@ public class ServerPreferencesController extends PreferencesDetailController {
         });
 
         testConnection.setOnAction(event -> {
-            try {
-                ElectrumServer.closeActiveConnection();
-            } catch (ServerException e) {
-                testResults.setText("Failed to disconnect:\n" + (e.getCause() != null ? e.getCause().getMessage() : e.getMessage()));
-            }
-
-            ElectrumServer.ServerVersionService serverVersionService = new ElectrumServer.ServerVersionService();
-            serverVersionService.setOnSucceeded(successEvent -> {
-                List<String> serverVersion = serverVersionService.getValue();
-                testResults.setText("Connected to " + serverVersion.get(0) + " on protocol version " + serverVersion.get(1));
-                testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.CHECK_CIRCLE, Color.rgb(80, 161, 79)));
+            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(bannerSuccessEvent -> {
-                    testResults.setText(testResults.getText() + "\nServer Banner: " + serverBannerService.getValue());
-                });
-                serverBannerService.setOnFailed(bannerFailEvent -> {
-                    testResults.setText(testResults.getText() + "\nServer Banner: None");
+                serverBannerService.setOnSucceeded(successEvent -> {
+                    showConnectionSuccess(null, serverBannerService.getValue());
                 });
+                serverBannerService.setOnFailed(this::showConnectionFailure);
                 serverBannerService.start();
-            });
-            serverVersionService.setOnFailed(failEvent -> {
-                Throwable e = failEvent.getSource().getException();
-                String reason = e.getCause() != null ? e.getCause().getMessage() : e.getMessage();
-                if(e.getCause() != null && e.getCause() instanceof SSLHandshakeException) {
-                    reason = "SSL Handshake Error\n" + reason;
-                }
-
-                testResults.setText("Could not connect:\n\n" + reason);
-                testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.EXCLAMATION_CIRCLE, Color.rgb(202, 18, 67)));
-            });
-            testResults.setText("Connecting to " + config.getElectrumServer() + "...");
-            testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.ELLIPSIS_H, null));
-            serverVersionService.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();
+            }
         });
 
         String electrumServer = config.getElectrumServer();
@@ -201,6 +194,27 @@ public class ServerPreferencesController extends PreferencesDetailController {
         }
     }
 
+    private void showConnectionSuccess(List<String> serverVersion, String serverBanner) {
+        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.CHECK_CIRCLE, Color.rgb(80, 161, 79)));
+        if(serverVersion != null) {
+            testResults.setText("Connected to " + serverVersion.get(0) + " on protocol version " + serverVersion.get(1));
+        }
+        if(serverBanner != null) {
+            testResults.setText(testResults.getText() + "\nServer Banner: " + serverBanner);
+        }
+    }
+
+    private void showConnectionFailure(WorkerStateEvent failEvent) {
+        Throwable e = failEvent.getSource().getException();
+        String reason = e.getCause() != null ? e.getCause().getMessage() : e.getMessage();
+        if(e.getCause() != null && e.getCause() instanceof SSLHandshakeException) {
+            reason = "SSL Handshake Error\n" + reason;
+        }
+
+        testResults.setText("Could not connect:\n\n" + reason);
+        testConnection.setGraphic(getGlyph(FontAwesome5.Glyph.EXCLAMATION_CIRCLE, Color.rgb(202, 18, 67)));
+    }
+
     private void setupValidation() {
         validationSupport.registerValidator(host, Validator.combine(
                 (Control c, String newValue) -> ValidationResult.fromErrorIf( c, "Invalid host name", getHost(newValue) == null)

src/main/resources/com/sparrowwallet/sparrow/general.css

@@ -5,6 +5,11 @@
     -fx-padding: 5 0 5 0;
 }
 
+.form .wideLabelFieldSet.fieldset:horizontal .label-container {
+    -fx-pref-width: 160px;
+    -fx-pref-height: 25px;
+}
+
 .form .fieldset:horizontal .label-container {
     -fx-pref-width: 110px;
     -fx-pref-height: 25px;
@@ -112,4 +117,8 @@
 
 .copyable-text-field .copy-button:pressed > .graphic {
     -fx-background-color: #116a8d;
+}
+
+.help-label {
+    -fx-padding: 0 0 0 10;
 }

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

@@ -13,6 +13,9 @@
 <?import javafx.geometry.Insets?>
 <?import com.sparrowwallet.drongo.BitcoinUnit?>
 <?import com.sparrowwallet.sparrow.io.ExchangeSource?>
+<?import com.sparrowwallet.sparrow.control.UnlabeledToggleSwitch?>
+<?import com.sparrowwallet.sparrow.control.HelpLabel?>
+
 <GridPane hgap="10.0" vgap="10.0" stylesheets="@preferences.css, @../general.css" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.preferences.GeneralPreferencesController">
     <padding>
         <Insets left="25.0" right="25.0" top="25.0" />
@@ -25,8 +28,8 @@
     </rowConstraints>
 
     <Form GridPane.columnIndex="0" GridPane.rowIndex="0">
-        <Fieldset inputGrow="SOMETIMES" text="Bitcoin">
-            <Field text="Unit:">
+        <Fieldset inputGrow="SOMETIMES" text="Bitcoin" styleClass="wideLabelFieldSet">
+            <Field text="Display unit:">
                 <ComboBox fx:id="bitcoinUnit">
                     <items>
                         <FXCollections fx:factory="observableArrayList">
@@ -36,13 +39,14 @@
                         </FXCollections>
                     </items>
                 </ComboBox>
+                <HelpLabel helpText="Display unit for bitcoin amounts. Auto displays amounts over 1 BTC in BTC, and amounts under in satoshis"/>
             </Field>
         </Fieldset>
-        <Fieldset inputGrow="SOMETIMES" text="Fiat">
+        <Fieldset inputGrow="SOMETIMES" text="Fiat" styleClass="wideLabelFieldSet">
             <Field text="Currency:">
                 <ComboBox fx:id="fiatCurrency" />
             </Field>
-            <Field text="Source:">
+            <Field text="Exchange rate source:">
                 <ComboBox fx:id="exchangeSource">
                     <items>
                         <FXCollections fx:factory="observableArrayList">
@@ -54,5 +58,15 @@
                 </ComboBox>
             </Field>
         </Fieldset>
+        <Fieldset inputGrow="SOMETIMES" text="Coin Selection" styleClass="wideLabelFieldSet">
+            <Field text="Group by address:">
+                <UnlabeledToggleSwitch fx:id="groupByAddress" />
+                <HelpLabel helpText="Group UTXOs by address when sending to improve privacy by only sending from an address once"/>
+            </Field>
+            <Field text="Include mempool change:">
+                <UnlabeledToggleSwitch fx:id="includeMempoolChange" />
+                <HelpLabel helpText="Allow a wallet to spend UTXOs that are still in the mempool where all their inputs are from that wallet"/>
+            </Field>
+        </Fieldset>
     </Form>
 </GridPane>