Add FileWidget.FILE_AND_DIRECTORY_STYLE

pom.xml

@@ -134,6 +134,11 @@
 			<url>https://imagej.net/people/jaywarrick</url>
 			<properties><id>jaywarrick</id></properties>
 		</contributor>
+		<contributor>
+			<name>Christian Tischer</name>
+			<url>https://imagej.net/people/tischi</url>
+			<properties><id>tischi</id></properties>
+		</contributor>
 	</contributors>
 
 	<mailingLists>

src/main/java/org/scijava/ui/UserInterface.java

@@ -163,6 +163,7 @@ default File chooseFile(final File file, final String style) {
 		// TODO use a utility class for style handling, e.g. StyleUtils.isStyle(style, ...)
 		if (style == null) title = "Choose a file";
 		else if (style.toLowerCase().contains(FileWidget.DIRECTORY_STYLE)) title = "Choose a directory";
+		else if (style.toLowerCase().contains(FileWidget.FILE_AND_DIRECTORY_STYLE )) title = "Choose a file or directory";
 		else if (style.toLowerCase().contains(FileWidget.OPEN_STYLE)) title = "Open";
 		else if (style.toLowerCase().contains(FileWidget.SAVE_STYLE)) title = "Save";
 		else title = "Choose a file";
@@ -180,6 +181,7 @@ default File chooseFile(final File file, final String style) {
 	 *          <li>{@link FileWidget#OPEN_STYLE}</li>
 	 *          <li>{@link FileWidget#SAVE_STYLE}</li>
 	 *          <li>{@link FileWidget#DIRECTORY_STYLE}</li>
+	 *          <li>{@link FileWidget#FILE_AND_DIRECTORY_STYLE}</li>
 	 *          </ul>
 	 * @return The {@link File} chosen by the user, or null if prompt is not
 	 *         available

src/main/java/org/scijava/widget/FileWidget.java

@@ -59,4 +59,11 @@ public interface FileWidget<U> extends InputWidget<File, U> {
 	 */
 	String DIRECTORY_STYLE = "directory";
 
+	/**
+	 * Widget style for directory chooser dialogs.
+	 *
+	 * @see org.scijava.plugin.Parameter#style()
+	 */
+	String FILE_AND_DIRECTORY_STYLE = "both";
+
 }