add google guava for event bus, app control changes

build.gradle

@@ -28,6 +28,7 @@ dependencies {
         exclude group: 'org.hamcrest'
         exclude group: 'junit'
     }
+    implementation('com.google.guava:guava:28.2-jre')
     implementation('org.fxmisc.richtext:richtextfx:0.10.4')
     implementation('no.tornado:tornadofx-controls:1.0.4')
     implementation('org.controlsfx:controlsfx:11.0.1' ) {
@@ -56,7 +57,7 @@ jlink {
         requires 'javafx.base';
     }
 
-    options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages', '--ignore-signing-information']
+    options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages', '--ignore-signing-information', '--exclude-files', '**.png']
     launcher {
         name = 'sparrow'
         jvmArgs = ["--add-opens=javafx.graphics/com.sun.javafx.css=org.controlsfx.controls"]
@@ -75,7 +76,6 @@ jlink {
         }
         if (org.gradle.internal.os.OperatingSystem.current().macOsX) {
             imageOptions += ['--icon', 'src/main/resources/sparrow.icns']
-
             installerType = "dmg"
         }
     }

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

@@ -1,18 +1,19 @@
 package com.sparrowwallet.sparrow;
 
+import com.google.common.eventbus.Subscribe;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTParseException;
+import com.sparrowwallet.sparrow.event.TabEvent;
+import com.sparrowwallet.sparrow.event.TransactionTabChangedEvent;
+import com.sparrowwallet.sparrow.event.TransactionTabSelectedEvent;
 import com.sparrowwallet.sparrow.transaction.TransactionController;
-import com.sparrowwallet.sparrow.transaction.TransactionListener;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.fxml.Initializable;
-import javafx.scene.control.Alert;
+import javafx.scene.control.*;
-import javafx.scene.control.Tab;
-import javafx.scene.control.TabPane;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
 
@@ -23,6 +24,10 @@ import java.net.URL;
 import java.util.ResourceBundle;
 
 public class AppController implements Initializable {
+    private static final String TRANSACTION_TAB_TYPE = "transaction";
+
+    @FXML
+    private CheckMenuItem showTxHex;
 
     @FXML
     private TabPane tabs;
@@ -33,14 +38,15 @@ public class AppController implements Initializable {
     }
 
     void initializeView() {
-        tabs.getSelectionModel().selectedItemProperty().addListener((observable, old_val, new_val) -> {
+        tabs.getSelectionModel().selectedItemProperty().addListener((observable, old_val, selectedTab) -> {
-            String tabName = new_val.getText();
+            String tabType = (String)selectedTab.getUserData();
-            if(tabs.getScene() != null) {
+            if(tabType.equals(TRANSACTION_TAB_TYPE)) {
-                Stage tabStage = (Stage)tabs.getScene().getWindow();
+                EventManager.get().post(new TransactionTabSelectedEvent(selectedTab));
-                tabStage.setTitle("Sparrow - " + tabName);
             }
         });
 
+        showTxHex.setSelected(true);
+
         addExampleTxTabs();
     }
 
@@ -99,6 +105,11 @@ public class AppController implements Initializable {
         }
     }
 
+    public void showTxHex(ActionEvent event) {
+        CheckMenuItem item = (CheckMenuItem)event.getSource();
+        EventManager.get().post(new TransactionTabChangedEvent(tabs.getSelectionModel().getSelectedItem(), item.isSelected()));
+    }
+
     private void addExampleTxTabs() {
         addTransactionTab("p2pkh", "01000000019c2e0f24a03e72002a96acedb12a632e72b6b74c05dc3ceab1fe78237f886c48010000006a47304402203da9d487be5302a6d69e02a861acff1da472885e43d7528ed9b1b537a8e2cac9022002d1bca03a1e9715a99971bafe3b1852b7a4f0168281cbd27a220380a01b3307012102c9950c622494c2e9ff5a003e33b690fe4832477d32c2d256c67eab8bf613b34effffffff02b6f50500000000001976a914bdf63990d6dc33d705b756e13dd135466c06b3b588ac845e0201000000001976a9145fb0e9755a3424efd2ba0587d20b1e98ee29814a88ac06241559", null);
         addTransactionTab("p2sh", "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", null);
@@ -131,6 +142,7 @@ public class AppController implements Initializable {
     private Tab addTransactionTab(String name, Transaction transaction, PSBT psbt) {
         try {
             Tab tab = new Tab(name);
+            tab.setUserData(TRANSACTION_TAB_TYPE);
             tab.setClosable(true);
             FXMLLoader transactionLoader = new FXMLLoader(getClass().getResource("transaction/transaction.fxml"));
             tab.setContent(transactionLoader.load());
@@ -148,4 +160,16 @@ public class AppController implements Initializable {
             throw new RuntimeException(e);
         }
     }
+
+    @Subscribe
+    public void tabSelected(TabEvent event) {
+        Tab selectedTab = event.getTab();
+        String tabType = (String)selectedTab.getUserData();
+
+        String tabName = selectedTab.getText();
+        if(tabs.getScene() != null) {
+            Stage tabStage = (Stage)tabs.getScene().getWindow();
+            tabStage.setTitle("Sparrow - " + tabName);
+        }
+    }
 }

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

@@ -1,32 +1,13 @@
 package com.sparrowwallet.sparrow;
 
-import com.sparrowwallet.drongo.protocol.Transaction;
+import com.google.common.eventbus.EventBus;
-import com.sparrowwallet.sparrow.transaction.TransactionListener;
-
-import java.util.ArrayList;
-import java.util.List;
 
 public class EventManager {
-    private List<TransactionListener> listenerList = new ArrayList<>();
+    private static EventBus SINGLETON = new EventBus();
-    private static EventManager SINGLETON = new EventManager();
 
     private EventManager() {}
 
-    public void subscribe(TransactionListener listener) {
+    public static EventBus get() {
-        listenerList.add(listener);
-    }
-
-    public void unsubscribe(TransactionListener listener) {
-        listenerList.remove(listener);
-    }
-
-    public void notify(Transaction transaction) {
-        for (TransactionListener listener : listenerList) {
-            listener.updated(transaction);
-        }
-    }
-
-    public static EventManager get() {
         return SINGLETON;
     }
 }

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

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import javafx.scene.control.Tab;
+
+public class TabEvent {
+    private Tab tab;
+
+    public TabEvent(Tab tab) {
+        this.tab = tab;
+    }
+
+    public Tab getTab() {
+        return tab;
+    }
+}

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

@@ -0,0 +1,15 @@
+package com.sparrowwallet.sparrow.event;
+
+import com.sparrowwallet.drongo.protocol.Transaction;
+
+public class TransactionChangedEvent {
+    private Transaction transaction;
+
+    public TransactionChangedEvent(Transaction transaction) {
+        this.transaction = transaction;
+    }
+
+    public Transaction getTransaction() {
+        return transaction;
+    }
+}

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

@@ -0,0 +1,16 @@
+package com.sparrowwallet.sparrow.event;
+
+import javafx.scene.control.Tab;
+
+public class TransactionTabChangedEvent extends TabEvent {
+    private boolean txHexVisible;
+
+    public TransactionTabChangedEvent(Tab tab, boolean txHexVisible) {
+        super(tab);
+        this.txHexVisible = txHexVisible;
+    }
+
+    public boolean isTxHexVisible() {
+        return txHexVisible;
+    }
+}

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

@@ -0,0 +1,9 @@
+package com.sparrowwallet.sparrow.event;
+
+import javafx.scene.control.Tab;
+
+public class TransactionTabSelectedEvent extends TabEvent {
+    public TransactionTabSelectedEvent(Tab tab) {
+        super(tab);
+    }
+}

src/main/java/com/sparrowwallet/sparrow/transaction/HeadersController.java

@@ -4,18 +4,20 @@ import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.IdLabel;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
+import com.sparrowwallet.sparrow.event.TransactionChangedEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.*;
 import tornadofx.control.DateTimePicker;
 import tornadofx.control.Field;
 import tornadofx.control.Fieldset;
+import com.google.common.eventbus.Subscribe;
 
 import java.net.URL;
 import java.time.*;
 import java.util.ResourceBundle;
 
-public class HeadersController extends TransactionFormController implements Initializable, TransactionListener {
+public class HeadersController extends TransactionFormController implements Initializable {
     public static final String LOCKTIME_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
 
     private HeadersForm headersForm;
@@ -76,7 +78,7 @@ public class HeadersController extends TransactionFormController implements Init
 
     @Override
     public void initialize(URL location, ResourceBundle resources) {
-        EventManager.get().subscribe(this);
+        EventManager.get().register(this);
     }
 
     void setModel(HeadersForm form) {
@@ -92,7 +94,7 @@ public class HeadersController extends TransactionFormController implements Init
         version.setValueFactory(new SpinnerValueFactory.IntegerSpinnerValueFactory(1, 2, (int)tx.getVersion()));
         version.valueProperty().addListener((obs, oldValue, newValue) -> {
             tx.setVersion(newValue);
-            EventManager.get().notify(tx);
+            EventManager.get().post(new TransactionChangedEvent(tx));
         });
 
         String type = "Legacy";
@@ -113,7 +115,7 @@ public class HeadersController extends TransactionFormController implements Init
                     locktimeFieldset.getChildren().remove(locktimeNoneField);
                     locktimeFieldset.getChildren().add(locktimeNoneField);
                     tx.setLocktime(0);
-                    EventManager.get().notify(tx);
+                    EventManager.get().post(new TransactionChangedEvent(tx));
                 } else if(selection.equals("block")) {
                     locktimeFieldset.getChildren().remove(locktimeDateField);
                     locktimeFieldset.getChildren().remove(locktimeBlockField);
@@ -122,7 +124,7 @@ public class HeadersController extends TransactionFormController implements Init
                     Integer block = locktimeBlock.getValue();
                     if(block != null) {
                         tx.setLocktime(block);
-                        EventManager.get().notify(tx);
+                        EventManager.get().post(new TransactionChangedEvent(tx));
                     }
                 } else {
                     locktimeFieldset.getChildren().remove(locktimeBlockField);
@@ -133,7 +135,7 @@ public class HeadersController extends TransactionFormController implements Init
                     if(date != null) {
                         locktimeDate.setDateTimeValue(date);
                         tx.setLocktime(date.toEpochSecond(OffsetDateTime.now(ZoneId.systemDefault()).getOffset()));
-                        EventManager.get().notify(tx);
+                        EventManager.get().post(new TransactionChangedEvent(tx));
                     }
                 }
             }
@@ -158,13 +160,13 @@ public class HeadersController extends TransactionFormController implements Init
 
         locktimeBlock.valueProperty().addListener((obs, oldValue, newValue) -> {
             tx.setLocktime(newValue);
-            EventManager.get().notify(tx);
+            EventManager.get().post(new TransactionChangedEvent(tx));
         });
 
         locktimeDate.setFormat(LOCKTIME_DATE_FORMAT);
         locktimeDate.dateTimeValueProperty().addListener((obs, oldValue, newValue) -> {
             tx.setLocktime(newValue.toEpochSecond(OffsetDateTime.now(ZoneId.systemDefault()).getOffset()));
-            EventManager.get().notify(tx);
+            EventManager.get().post(new TransactionChangedEvent(tx));
         });
 
         size.setText(tx.getSize() + " B");
@@ -188,10 +190,10 @@ public class HeadersController extends TransactionFormController implements Init
         id.setText(headersForm.getTransaction().calculateTxId(false).toString());
     }
 
-    @Override
+    @Subscribe
-    public void updated(Transaction transaction) {
+    public void transactionChanged(TransactionChangedEvent event) {
+        if(headersForm.getTransaction().equals(event.getTransaction())) {
             updateTxId();
-
             boolean locktimeEnabled = headersForm.getTransaction().isLocktimeSequenceEnabled();
             locktimeNoneType.setDisable(!locktimeEnabled);
             locktimeBlockType.setDisable(!locktimeEnabled);
@@ -199,4 +201,5 @@ public class HeadersController extends TransactionFormController implements Init
             locktimeDateType.setDisable(!locktimeEnabled);
             locktimeDate.setDisable(!locktimeEnabled);
         }
+    }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/InputController.java

@@ -9,6 +9,7 @@ import com.sparrowwallet.sparrow.EventManager;
 import com.sparrowwallet.sparrow.control.IdLabel;
 import com.sparrowwallet.sparrow.control.CopyableLabel;
 import com.sparrowwallet.sparrow.control.RelativeTimelockSpinner;
+import com.sparrowwallet.sparrow.event.TransactionChangedEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.*;
@@ -243,12 +244,12 @@ public class InputController extends TransactionFormController implements Initia
                     locktimeToggleGroup.selectToggle(locktimeAbsoluteType);
                 } else if(txInput.isAbsoluteTimeLocked()) {
                     txInput.setSequenceNumber(TransactionInput.SEQUENCE_RBF_ENABLED);
-                    EventManager.get().notify(transaction);
+                    EventManager.get().post(new TransactionChangedEvent(transaction));
                 }
             } else {
                 if(txInput.isAbsoluteTimeLocked()) {
                     txInput.setSequenceNumber(TransactionInput.SEQUENCE_LOCKTIME_DISABLED - 1);
-                    EventManager.get().notify(transaction);
+                    EventManager.get().post(new TransactionChangedEvent(transaction));
                 } else if(txInput.isRelativeTimeLocked()) {
                     locktimeToggleGroup.selectToggle(locktimeAbsoluteType);
                 }
@@ -268,7 +269,7 @@ public class InputController extends TransactionFormController implements Initia
                     locktimeAbsoluteField.setDisable(true);
                     txInput.setSequenceNumber(TransactionInput.SEQUENCE_LOCKTIME_DISABLED);
                     rbf.setSelected(false);
-                    EventManager.get().notify(transaction);
+                    EventManager.get().post(new TransactionChangedEvent(transaction));
                 } else if(selection.equals("absolute")) {
                     locktimeFieldset.getChildren().removeAll(locktimeRelativeField, locktimeAbsoluteField);
                     locktimeFieldset.getChildren().add(locktimeAbsoluteField);
@@ -279,7 +280,7 @@ public class InputController extends TransactionFormController implements Initia
                     } else {
                         txInput.setSequenceNumber(TransactionInput.SEQUENCE_LOCKTIME_DISABLED - 1);
                     }
-                    EventManager.get().notify(transaction);
+                    EventManager.get().post(new TransactionChangedEvent(transaction));
                 } else {
                     locktimeFieldset.getChildren().removeAll(locktimeRelativeField, locktimeAbsoluteField);
                     locktimeFieldset.getChildren().add(locktimeRelativeField);
@@ -348,7 +349,7 @@ public class InputController extends TransactionFormController implements Initia
             long value = locktimeRelativeSeconds.getValue().toSeconds() / TransactionInput.RELATIVE_TIMELOCK_SECONDS_INCREMENT;
             txInput.setSequenceNumber((value & TransactionInput.RELATIVE_TIMELOCK_VALUE_MASK) | TransactionInput.RELATIVE_TIMELOCK_TYPE_FLAG);
         }
-        EventManager.get().notify(transaction);
+        EventManager.get().post(new TransactionChangedEvent(transaction));
     }
 
     public void setModel(InputForm form) {

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionController.java

@@ -1,11 +1,15 @@
 package com.sparrowwallet.sparrow.transaction;
 
+import com.google.common.eventbus.Subscribe;
 import com.sparrowwallet.drongo.Utils;
 import com.sparrowwallet.drongo.protocol.*;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTInput;
 import com.sparrowwallet.drongo.psbt.PSBTOutput;
 import com.sparrowwallet.sparrow.EventManager;
+import com.sparrowwallet.sparrow.event.TransactionChangedEvent;
+import com.sparrowwallet.sparrow.event.TransactionTabChangedEvent;
+import com.sparrowwallet.sparrow.event.TransactionTabSelectedEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.Node;
@@ -15,6 +19,7 @@ import javafx.scene.control.TreeView;
 import javafx.scene.control.cell.TextFieldTreeCell;
 import javafx.scene.layout.Pane;
 import javafx.util.StringConverter;
+import org.controlsfx.control.MasterDetailPane;
 import org.fxmisc.richtext.CodeArea;
 
 import java.io.ByteArrayOutputStream;
@@ -22,7 +27,13 @@ import java.io.IOException;
 import java.net.URL;
 import java.util.ResourceBundle;
 
-public class TransactionController implements Initializable, TransactionListener {
+public class TransactionController implements Initializable {
+
+    @FXML
+    private Node tabContent;
+
+    @FXML
+    private MasterDetailPane transactionMasterDetail;
 
     @FXML
     private TreeView<TransactionForm> txtree;
@@ -40,7 +51,7 @@ public class TransactionController implements Initializable, TransactionListener
 
     @Override
     public void initialize(URL location, ResourceBundle resources) {
-        EventManager.get().subscribe(this);
+        EventManager.get().register(this);
     }
 
     private void initializeView() {
@@ -56,9 +67,9 @@ public class TransactionController implements Initializable, TransactionListener
         InputsForm inputsForm = (psbt == null ? new InputsForm(transaction) : new InputsForm(psbt));
         TreeItem<TransactionForm> inputsItem = new TreeItem<>(inputsForm);
         inputsItem.setExpanded(true);
-        for(TransactionInput txInput : transaction.getInputs()) {
+        for (TransactionInput txInput : transaction.getInputs()) {
             PSBTInput psbtInput = null;
-            if(psbt != null && psbt.getPsbtInputs().size() > txInput.getIndex()) {
+            if (psbt != null && psbt.getPsbtInputs().size() > txInput.getIndex()) {
                 psbtInput = psbt.getPsbtInputs().get(txInput.getIndex());
             }
             InputForm inputForm = (psbt == null ? new InputForm(transaction, txInput) : new InputForm(psbt, psbtInput));
@@ -69,9 +80,9 @@ public class TransactionController implements Initializable, TransactionListener
         OutputsForm outputsForm = (psbt == null ? new OutputsForm(transaction) : new OutputsForm(psbt));
         TreeItem<TransactionForm> outputsItem = new TreeItem<>(outputsForm);
         outputsItem.setExpanded(true);
-        for(TransactionOutput txOutput : transaction.getOutputs()) {
+        for (TransactionOutput txOutput : transaction.getOutputs()) {
             PSBTOutput psbtOutput = null;
-            if(psbt != null && psbt.getPsbtOutputs().size() > txOutput.getIndex()) {
+            if (psbt != null && psbt.getPsbtOutputs().size() > txOutput.getIndex()) {
                 psbtOutput = psbt.getPsbtOutputs().get(txOutput.getIndex());
             }
             OutputForm outputForm = (psbt == null ? new OutputForm(transaction, txOutput) : new OutputForm(psbt, psbtOutput));
@@ -83,7 +94,7 @@ public class TransactionController implements Initializable, TransactionListener
         rootItem.getChildren().add(outputsItem);
         txtree.setRoot(rootItem);
 
-        txtree.setCellFactory(p -> new TextFieldTreeCell<>(new StringConverter<TransactionForm>(){
+        txtree.setCellFactory(p -> new TextFieldTreeCell<>(new StringConverter<TransactionForm>() {
             @Override
             public String toString(TransactionForm transactionForm) {
                 return transactionForm.toString();
@@ -102,18 +113,18 @@ public class TransactionController implements Initializable, TransactionListener
                 txpane.getChildren().clear();
                 txpane.getChildren().add(node);
 
-                if(node instanceof Parent) {
+                if (node instanceof Parent) {
-                    Parent parent = (Parent)node;
+                    Parent parent = (Parent) node;
                     txhex.getStylesheets().clear();
                     txhex.getStylesheets().addAll(parent.getStylesheets());
 
                     selectedInputIndex = -1;
                     selectedOutputIndex = -1;
-                    if(transactionForm instanceof InputForm) {
+                    if (transactionForm instanceof InputForm) {
-                        InputForm inputForm = (InputForm)transactionForm;
+                        InputForm inputForm = (InputForm) transactionForm;
                         selectedInputIndex = inputForm.getTransactionInput().getIndex();
-                    } else if(transactionForm instanceof OutputForm) {
+                    } else if (transactionForm instanceof OutputForm) {
-                        OutputForm outputForm = (OutputForm)transactionForm;
+                        OutputForm outputForm = (OutputForm) transactionForm;
                         selectedOutputIndex = outputForm.getTransactionOutput().getIndex();
                     }
 
@@ -135,7 +146,7 @@ public class TransactionController implements Initializable, TransactionListener
             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             transaction.bitcoinSerializeToStream(baos);
             hex = Utils.bytesToHex(baos.toByteArray());
-        } catch(IOException e) {
+        } catch (IOException e) {
             throw new IllegalStateException("Can't happen");
         }
 
@@ -144,7 +155,7 @@ public class TransactionController implements Initializable, TransactionListener
         //Version
         cursor = addText(hex, cursor, 8, "version");
 
-        if(transaction.hasWitnesses()) {
+        if (transaction.hasWitnesses()) {
             //Segwit marker
             cursor = addText(hex, cursor, 2, "segwit-marker");
             //Segwit flag
@@ -153,43 +164,43 @@ public class TransactionController implements Initializable, TransactionListener
 
         //Number of inputs
         VarInt numInputs = new VarInt(transaction.getInputs().size());
-        cursor = addText(hex, cursor, numInputs.getSizeInBytes()*2, "num-inputs");
+        cursor = addText(hex, cursor, numInputs.getSizeInBytes() * 2, "num-inputs");
 
         //Inputs
         for (int i = 0; i < transaction.getInputs().size(); i++) {
             TransactionInput input = transaction.getInputs().get(i);
-            cursor = addText(hex, cursor, 32*2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "hash"));
+            cursor = addText(hex, cursor, 32 * 2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "hash"));
-            cursor = addText(hex, cursor, 4*2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "index"));
+            cursor = addText(hex, cursor, 4 * 2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "index"));
             VarInt scriptLen = new VarInt(input.getScriptBytes().length);
-            cursor = addText(hex, cursor, scriptLen.getSizeInBytes()*2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sigscript-length"));
+            cursor = addText(hex, cursor, scriptLen.getSizeInBytes() * 2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sigscript-length"));
-            cursor = addText(hex, cursor, (int)scriptLen.value*2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sigscript"));
+            cursor = addText(hex, cursor, (int) scriptLen.value * 2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sigscript"));
-            cursor = addText(hex, cursor, 4*2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sequence"));
+            cursor = addText(hex, cursor, 4 * 2, "input-" + getIndexedStyleClass(i, selectedInputIndex, "sequence"));
         }
 
         //Number of outputs
         VarInt numOutputs = new VarInt(transaction.getOutputs().size());
-        cursor = addText(hex, cursor, numOutputs.getSizeInBytes()*2, "num-outputs");
+        cursor = addText(hex, cursor, numOutputs.getSizeInBytes() * 2, "num-outputs");
 
         //Outputs
         for (int i = 0; i < transaction.getOutputs().size(); i++) {
             TransactionOutput output = transaction.getOutputs().get(i);
-            cursor = addText(hex, cursor, 8*2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "value"));
+            cursor = addText(hex, cursor, 8 * 2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "value"));
             VarInt scriptLen = new VarInt(output.getScriptBytes().length);
-            cursor = addText(hex, cursor, scriptLen.getSizeInBytes()*2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "pubkeyscript-length"));
+            cursor = addText(hex, cursor, scriptLen.getSizeInBytes() * 2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "pubkeyscript-length"));
-            cursor = addText(hex, cursor, (int)scriptLen.value*2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "pubkeyscript"));
+            cursor = addText(hex, cursor, (int) scriptLen.value * 2, "output-" + getIndexedStyleClass(i, selectedOutputIndex, "pubkeyscript"));
         }
 
-        if(transaction.hasWitnesses()) {
+        if (transaction.hasWitnesses()) {
             for (int i = 0; i < transaction.getInputs().size(); i++) {
                 TransactionInput input = transaction.getInputs().get(i);
-                if(input.hasWitness()) {
+                if (input.hasWitness()) {
                     TransactionWitness witness = input.getWitness();
                     VarInt witnessCount = new VarInt(witness.getPushCount());
-                    cursor = addText(hex, cursor, witnessCount.getSizeInBytes()*2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "count"));
+                    cursor = addText(hex, cursor, witnessCount.getSizeInBytes() * 2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "count"));
-                    for(byte[] push : witness.getPushes()) {
+                    for (byte[] push : witness.getPushes()) {
                         VarInt witnessLen = new VarInt(push.length);
-                        cursor = addText(hex, cursor, witnessLen.getSizeInBytes()*2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "length"));
+                        cursor = addText(hex, cursor, witnessLen.getSizeInBytes() * 2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "length"));
-                        cursor = addText(hex, cursor, (int)witnessLen.value*2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "data"));
+                        cursor = addText(hex, cursor, (int) witnessLen.value * 2, "witness-" + getIndexedStyleClass(i, selectedInputIndex, "data"));
                     }
                 }
             }
@@ -198,13 +209,13 @@ public class TransactionController implements Initializable, TransactionListener
         //Locktime
         cursor = addText(hex, cursor, 8, "locktime");
 
-        if(cursor != hex.length()) {
+        if (cursor != hex.length()) {
             throw new IllegalStateException("Cursor position does not match transaction serialisation " + cursor + ": " + hex.length());
         }
     }
 
     private String getIndexedStyleClass(int iterableIndex, int selectedIndex, String styleClass) {
-        if(selectedIndex == -1 || selectedIndex == iterableIndex) {
+        if (selectedIndex == -1 || selectedIndex == iterableIndex) {
             return styleClass;
         }
 
@@ -212,7 +223,7 @@ public class TransactionController implements Initializable, TransactionListener
     }
 
     private int addText(String hex, int cursor, int length, String styleClass) {
-        txhex.append(hex.substring(cursor, cursor+=length), styleClass);
+        txhex.append(hex.substring(cursor, cursor += length), styleClass);
         return cursor;
     }
 
@@ -229,9 +240,21 @@ public class TransactionController implements Initializable, TransactionListener
         initializeView();
     }
 
-    @Override
+    @Subscribe
-    public void updated(Transaction transaction) {
+    public void transactionChanged(TransactionChangedEvent event) {
+        if (event.getTransaction().equals(transaction)) {
             refreshTxHex();
             txtree.refresh();
         }
+    }
+
+    @Subscribe
+    public void tabSelected(TransactionTabSelectedEvent event) {
+
+    }
+
+    @Subscribe
+    public void tabChanged(TransactionTabChangedEvent event) {
+        transactionMasterDetail.setShowDetailNode(event.isTxHexVisible());
+    }
 }

src/main/java/com/sparrowwallet/sparrow/transaction/TransactionListener.java

@@ -1,7 +0,0 @@
-package com.sparrowwallet.sparrow.transaction;
-
-import com.sparrowwallet.drongo.protocol.Transaction;
-
-public interface TransactionListener {
-    void updated(Transaction transaction);
-}

src/main/java/module-info.java

@@ -6,5 +6,6 @@ open module com.sparrowwallet.sparrow {
     requires org.fxmisc.richtext;
     requires tornadofx.controls;
     requires com.sparrowwallet.drongo;
+    requires com.google.common;
     requires flowless;
 }

src/main/resources/com/sparrowwallet/sparrow/app.fxml

@@ -2,6 +2,7 @@
 
 <?import javafx.scene.control.*?>
 <?import javafx.scene.layout.*?>
+<?import org.controlsfx.control.StatusBar?>
 
 <VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="750.0" prefWidth="1100.0" fx:controller="com.sparrowwallet.sparrow.AppController" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1">
    <children>
@@ -18,6 +19,11 @@
               <MenuItem mnemonicParsing="false" text="Delete" />
             </items>
           </Menu>
+            <Menu mnemonicParsing="false" text="View">
+                <items>
+                    <CheckMenuItem fx:id="showTxHex" mnemonicParsing="false" text="Show Transaction Hex" onAction="#showTxHex" />
+                </items>
+            </Menu>
           <Menu mnemonicParsing="false" text="Help">
             <items>
               <MenuItem mnemonicParsing="false" text="About" />
@@ -27,6 +33,6 @@
       </MenuBar>
       <TabPane prefHeight="200.0" prefWidth="200.0" VBox.vgrow="ALWAYS" fx:id="tabs" />
 
-      <Label alignment="BOTTOM_LEFT" text="Label" />
+      <StatusBar text=""/>
    </children>
 </VBox>

src/main/resources/com/sparrowwallet/sparrow/transaction/transaction.fxml

@@ -3,20 +3,27 @@
 <?import javafx.scene.control.*?>
 <?import javafx.scene.layout.*?>
 <?import org.fxmisc.richtext.*?>
-
 <?import org.fxmisc.flowless.VirtualizedScrollPane?>
-<SplitPane dividerPositions="0.82" orientation="VERTICAL" prefHeight="200.0" prefWidth="160.0" stylesheets="@transaction.css" VBox.vgrow="ALWAYS" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.transaction.TransactionController">
+<?import org.controlsfx.control.MasterDetailPane?>
+
+<SplitPane fx:id="tabContent" dividerPositions="0.82" orientation="VERTICAL" prefHeight="200.0" prefWidth="160.0" stylesheets="@transaction.css" VBox.vgrow="ALWAYS" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.sparrowwallet.sparrow.transaction.TransactionController">
 <items>
+    <MasterDetailPane fx:id="transactionMasterDetail" detailSide="BOTTOM">
+        <masterNode>
             <SplitPane dividerPositions="0.2" prefHeight="160.0" prefWidth="200.0">
                 <items>
                     <TreeView fx:id="txtree" prefHeight="154.0" prefWidth="174.0" />
                     <Pane fx:id="txpane" />
                 </items>
             </SplitPane>
+        </masterNode>
+        <detailNode>
             <VirtualizedScrollPane>
                 <content>
                     <CodeArea fx:id="txhex" editable="false" wrapText="true" />
                 </content>
             </VirtualizedScrollPane>
+        </detailNode>
+    </MasterDetailPane>
 </items>
 </SplitPane>