hooked up all controls in Preferences window

main/commons/src/main/java/org/cryptomator/common/settings/Settings.java

@@ -24,7 +24,7 @@ public class Settings {
 	public static final boolean DEFAULT_CHECK_FOR_UDPATES = false;
 	public static final int DEFAULT_PORT = 42427;
 	public static final int DEFAULT_NUM_TRAY_NOTIFICATIONS = 3;
-	public static final String DEFAULT_GVFS_SCHEME = "dav";
+	public static final WebDavUrlScheme DEFAULT_GVFS_SCHEME = WebDavUrlScheme.DAV;
 	public static final boolean DEFAULT_DEBUG_MODE = false;
 	public static final VolumeImpl DEFAULT_PREFERRED_VOLUME_IMPL = System.getProperty("os.name").toLowerCase().contains("windows") ? VolumeImpl.DOKANY : VolumeImpl.FUSE;
 
@@ -33,7 +33,7 @@ public class Settings {
 	private final BooleanProperty checkForUpdates = new SimpleBooleanProperty(DEFAULT_CHECK_FOR_UDPATES);
 	private final IntegerProperty port = new SimpleIntegerProperty(DEFAULT_PORT);
 	private final IntegerProperty numTrayNotifications = new SimpleIntegerProperty(DEFAULT_NUM_TRAY_NOTIFICATIONS);
-	private final StringProperty preferredGvfsScheme = new SimpleStringProperty(DEFAULT_GVFS_SCHEME);
+	private final ObjectProperty<WebDavUrlScheme> preferredGvfsScheme = new SimpleObjectProperty<>(DEFAULT_GVFS_SCHEME);
 	private final BooleanProperty debugMode = new SimpleBooleanProperty(DEFAULT_DEBUG_MODE);
 	private final ObjectProperty<VolumeImpl> preferredVolumeImpl = new SimpleObjectProperty<>(DEFAULT_PREFERRED_VOLUME_IMPL);
 
@@ -89,7 +89,7 @@ public class Settings {
 		return numTrayNotifications;
 	}
 
-	public StringProperty preferredGvfsScheme() {
+	public ObjectProperty<WebDavUrlScheme> preferredGvfsScheme() {
 		return preferredGvfsScheme;
 	}
 

main/commons/src/main/java/org/cryptomator/common/settings/SettingsJsonAdapter.java

@@ -31,7 +31,7 @@ public class SettingsJsonAdapter extends TypeAdapter<Settings> {
 		out.name("checkForUpdatesEnabled").value(value.checkForUpdates().get());
 		out.name("port").value(value.port().get());
 		out.name("numTrayNotifications").value(value.numTrayNotifications().get());
-		out.name("preferredGvfsScheme").value(value.preferredGvfsScheme().get());
+		out.name("preferredGvfsScheme").value(value.preferredGvfsScheme().get().name());
 		out.name("debugMode").value(value.debugMode().get());
 		out.name("preferredVolumeImpl").value(value.preferredVolumeImpl().get().name());
 		out.endObject();
@@ -69,7 +69,7 @@ public class SettingsJsonAdapter extends TypeAdapter<Settings> {
 					settings.numTrayNotifications().set(in.nextInt());
 					break;
 				case "preferredGvfsScheme":
-					settings.preferredGvfsScheme().set(in.nextString());
+					settings.preferredGvfsScheme().set(parseWebDavUrlSchemePrefix(in.nextString()));
 					break;
 				case "debugMode":
 					settings.debugMode().set(in.nextBoolean());
@@ -90,12 +90,20 @@ public class SettingsJsonAdapter extends TypeAdapter<Settings> {
 
 	private VolumeImpl parsePreferredVolumeImplName(String nioAdapterName) {
 		try {
-			return VolumeImpl.valueOf(nioAdapterName);
+			return VolumeImpl.valueOf(nioAdapterName.toUpperCase());
 		} catch (IllegalArgumentException e) {
 			return Settings.DEFAULT_PREFERRED_VOLUME_IMPL;
 		}
 	}
 
+	private WebDavUrlScheme parseWebDavUrlSchemePrefix(String webDavUrlSchemeName) {
+		try {
+			return WebDavUrlScheme.valueOf(webDavUrlSchemeName.toUpperCase());
+		} catch (IllegalArgumentException e) {
+			return Settings.DEFAULT_GVFS_SCHEME;
+		}
+	}
+
 	private List<VaultSettings> readVaultSettingsArray(JsonReader in) throws IOException {
 		List<VaultSettings> result = new ArrayList<>();
 		in.beginArray();

main/commons/src/main/java/org/cryptomator/common/settings/WebDavUrlScheme.java

@@ -0,0 +1,37 @@
+package org.cryptomator.common.settings;
+
+import java.util.Arrays;
+
+public enum WebDavUrlScheme {
+	DAV("dav", "dav:// (Gnome, Nautilus, ...)"),
+	WEBDAV("webdav", "webdav:// (KDE, Dolphin, ...)");
+
+	private final String prefix;
+	private final String displayName;
+
+	WebDavUrlScheme(String prefix, String displayName) {this.prefix = prefix;
+		this.displayName = displayName;
+	}
+
+	public String getPrefix() {
+		return prefix;
+	}
+
+	public String getDisplayName() {
+		return displayName;
+	}
+
+	/**
+	 * Finds a WebDavUrlScheme by prefix.
+	 *
+	 * @param prefix Prefix of the WebDavUrlScheme
+	 * @return WebDavUrlScheme with the given <code>prefix</code>.
+	 * @throws IllegalArgumentException if not WebDavUrlScheme with the given <code>prefix</code> was found.
+	 */
+	public static WebDavUrlScheme forPrefix(String prefix) throws IllegalArgumentException {
+		return Arrays.stream(values()) //
+				.filter(impl -> impl.prefix.equals(prefix)) //
+				.findAny() //
+				.orElseThrow(IllegalArgumentException::new);
+	}
+}

main/commons/src/test/java/org/cryptomator/common/settings/SettingsTest.java

@@ -23,7 +23,7 @@ public class SettingsTest {
 		Mockito.verify(changeListener, Mockito.times(0)).accept(settings);
 
 		// first change (to property):
-		settings.preferredGvfsScheme().set("asd");
+		settings.preferredGvfsScheme().set(WebDavUrlScheme.DAV);
 		Mockito.verify(changeListener, Mockito.times(1)).accept(settings);
 
 		// second change (to list):