initial setup and drag file improvements

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

@@ -146,8 +146,12 @@ public class AppController implements Initializable {
             boolean success = false;
             if(db.hasFiles()) {
                 for(File file : db.getFiles()) {
+                    if(isWalletFile(file)) {
+                        openWalletFile(file);
+                    } else {
                         openTransactionFile(file);
                     }
+                }
                 success = true;
             }
             event.setDropCompleted(success);
@@ -181,6 +185,11 @@ public class AppController implements Initializable {
                 if(walletAdded || walletRemoved) {
                     EventManager.get().post(new OpenWalletsEvent(getOpenWallets()));
                 }
+
+                if(tabs.getTabs().isEmpty()) {
+                    Stage tabStage = (Stage)tabs.getScene().getWindow();
+                    tabStage.setTitle("Sparrow");
+                }
             }
         });
 
@@ -583,6 +592,11 @@ public class AppController implements Initializable {
         EventManager.get().post(new BitcoinUnitChangedEvent(unit));
     }
 
+    private boolean isWalletFile(File file) {
+        FileType fileType = IOUtils.getFileType(file);
+        return FileType.JSON.equals(fileType) || FileType.BINARY.equals(fileType);
+    }
+
     public void newWallet(ActionEvent event) {
         WalletNameDialog dlg = new WalletNameDialog();
         Optional<String> walletName = dlg.showAndWait();

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

@@ -31,6 +31,7 @@ public class MainApp extends Application {
         GlyphFontRegistry.register(new FontAwesome5());
         GlyphFontRegistry.register(new FontAwesome5Brands());
 
+        boolean createNewWallet = false;
         Mode mode = Config.get().getMode();
         if(mode == null) {
             WelcomeDialog welcomeDialog = new WelcomeDialog(getHostServices());
@@ -40,8 +41,9 @@ public class MainApp extends Application {
                 Config.get().setMode(mode);
 
                 if(mode.equals(Mode.ONLINE)) {
-                    PreferencesDialog preferencesDialog = new PreferencesDialog(PreferenceGroup.SERVER);
+                    PreferencesDialog preferencesDialog = new PreferencesDialog(PreferenceGroup.SERVER, true);
-                    preferencesDialog.showAndWait();
+                    Optional<Boolean> optNewWallet = preferencesDialog.showAndWait();
+                    createNewWallet = optNewWallet.isPresent() && optNewWallet.get();
                 }
             }
         }
@@ -64,6 +66,10 @@ public class MainApp extends Application {
 
         stage.show();
 
+        if(createNewWallet) {
+            appController.newWallet(null);
+        }
+
         List<File> recentWalletFiles = Config.get().getRecentWalletFiles();
         if(recentWalletFiles != null) {
             for(File walletFile : recentWalletFiles) {

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

@@ -1,7 +1,6 @@
 package com.sparrowwallet.sparrow.io;
 
-import java.io.File;
+import java.io.*;
-import java.io.IOException;
 import java.nio.file.Files;
 
 public class IOUtils {
@@ -9,6 +8,19 @@ public class IOUtils {
         try {
             String type = Files.probeContentType(file.toPath());
             if (type == null) {
+                if(file.getName().toLowerCase().endsWith("txn") || file.getName().toLowerCase().endsWith("psbt")) {
+                    return FileType.TEXT;
+                }
+
+                if(file.exists()) {
+                    try(BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)))) {
+                        String line = br.readLine();
+                        if(line.startsWith("01000000") || line.startsWith("cHNid")) {
+                            return FileType.TEXT;
+                        }
+                    }
+                }
+
                 return FileType.BINARY;
             } else if (type.equals("application/json")) {
                 return FileType.JSON;

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

@@ -11,12 +11,16 @@ import org.controlsfx.tools.Borders;
 
 import java.io.IOException;
 
-public class PreferencesDialog extends Dialog<Void> {
+public class PreferencesDialog extends Dialog<Boolean> {
     public PreferencesDialog() {
         this(null);
     }
 
     public PreferencesDialog(PreferenceGroup initialGroup) {
+        this(initialGroup, false);
+    }
+
+    public PreferencesDialog(PreferenceGroup initialGroup, boolean initialSetup) {
         final DialogPane dialogPane = getDialogPane();
 
         try {
@@ -32,8 +36,16 @@ public class PreferencesDialog extends Dialog<Void> {
 
             final ButtonType closeButtonType = new javafx.scene.control.ButtonType("Close", ButtonBar.ButtonData.CANCEL_CLOSE);
             dialogPane.getButtonTypes().addAll(closeButtonType);
+
+            final ButtonType newWalletButtonType = new javafx.scene.control.ButtonType("Create New Wallet", ButtonBar.ButtonData.OK_DONE);
+            if(initialSetup) {
+                dialogPane.getButtonTypes().addAll(newWalletButtonType);
+            }
+
             dialogPane.setPrefWidth(650);
             dialogPane.setPrefHeight(500);
+
+            setResultConverter(dialogButton -> dialogButton == newWalletButtonType ? Boolean.TRUE : null);
         } catch(IOException e) {
             throw new RuntimeException(e);
         }