System File Chooser: added PatternFilter to support glob file filter on Windows and on Linux, but not on macOS (issue #1076)

also require that `SystemFileChooser.show*Dialog()` methods are invoked on AWT thread

.github/workflows/natives.yml

@@ -73,7 +73,8 @@ jobs:
               run: ./gradlew build-natives --no-daemon
 
             - name: Sign Windows DLLs
-              if: matrix.os == 'windows-latest'
+              if: false
+#              if: matrix.os == 'windows-latest'
               uses: skymatic/code-sign-action@v3
               with:
                 certificate: '${{ secrets.CODE_SIGN_CERT_BASE64 }}'
@@ -82,7 +83,8 @@ jobs:
                 folder: 'flatlaf-core/src/main/resources/com/formdev/flatlaf/natives'
 
             - name: Sign macOS natives
-              if: matrix.os == 'DISABLED--macos-latest'
+              if: false
+#              if: matrix.os == 'DISABLED--macos-latest'
               env:
                 CERT_BASE64: ${{ secrets.CODE_SIGN_CERT_BASE64 }}
                 CERT_PASSWORD: ${{ secrets.CODE_SIGN_CERT_PASSWORD }}

CHANGELOG.md

@@ -3,6 +3,15 @@ FlatLaf Change Log
 
 ## 3.7.1-SNAPSHOT
 
+- System File Chooser:
+  - Update current filter before invoking approve callback and after closing
+    dialog. (issue #1065)
+  - Added `PatternFilter` to support glob file filter (e.g. `*.tar.gz`) on
+    Windows and on Linux, but not on macOS. (issue #1076)
+  - Fixed: System and Swing file dialogs were shown at the same time if
+    application has no other displayable window. (issue #1078)
+  - On Linux: Check whether required GSettings schemas are installed to avoid
+    application crash (occurred on NixOS with Plasma/KDE desktop). (issue #1069)
 - ComboBox: Added UI property `ComboBox.buttonFocusedEditableBackground`. (issue
   #1068)
 - Popup: Fixed scrolling popup painting issue on Windows 10 when a glass pane is

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeLinuxLibrary.java

@@ -37,7 +37,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeLinuxLibrary
 {
-	private static int API_VERSION_LINUX = 3003;
+	private static int API_VERSION_LINUX = 3004;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -186,8 +186,8 @@ public class FlatNativeLinuxLibrary
 	 *        Use '__' for '_' character (e.g. "Choose__and__Quit").
 	 * @param currentName user-editable filename currently shown in the filename field in save dialog; or {@code null}
 	 * @param currentFolder current directory shown in the dialog; or {@code null}
-	 * @param optionsSet options to set; see {@code FOS_*} constants
+	 * @param optionsSet options to set; see {@code FC_*} constants
-	 * @param optionsClear options to clear; see {@code FOS_*} constants
+	 * @param optionsClear options to clear; see {@code FC_*} constants
 	 * @param callback approve callback; or {@code null}
 	 * @param fileTypeIndex the file type that appears as selected (zero-based)
 	 * @param fileTypes file types that the dialog can open or save.
@@ -195,19 +195,20 @@ public class FlatNativeLinuxLibrary
 	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
 	 *        Subsequent strings are the filter patterns (e.g. "*.txt" or "*").
 	 *        {@code null} is required to mark end of filter.
+	 * @param retFileTypeIndex returns selected file type (zero-based); array must be have one element
 	 * @return file path(s) that the user selected; an empty array if canceled;
 	 *         or {@code null} on failures (no dialog shown)
 	 *
-	 * @since 3.7
+	 * @since 3.7.1
 	 */
 	public native static String[] showFileChooser( Window owner, int dark, boolean open,
 		String title, String okButtonLabel, String currentName, String currentFolder,
 		int optionsSet, int optionsClear, FileChooserCallback callback,
-		int fileTypeIndex, String... fileTypes );
+		int fileTypeIndex, String[] fileTypes, int[] retFileTypeIndex );
 
-	/** @since 3.7 */
+	/** @since 3.7.1 */
 	public interface FileChooserCallback {
-		boolean approve( String[] files, long hwndFileDialog );
+		boolean approve( String[] files, int fileTypeIndex, long hwndFileDialog );
 	}
 
 	/**

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeMacLibrary.java

@@ -45,7 +45,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeMacLibrary
 {
-	private static int API_VERSION_MACOS = 2002;
+	private static int API_VERSION_MACOS = 2003;
 
 	/**
 	 * Checks whether native library is loaded/available.
@@ -115,22 +115,23 @@ public class FlatNativeMacLibrary
 	 * @param fileTypes file types that the dialog can open or save.
 	 *        Two or more strings and {@code null} are required for each filter.
 	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
-	 *        Subsequent strings are the filter patterns (e.g. "txt" or "*").
+	 *        Subsequent strings are the file name extensions (e.g. "txt" or "*"; '.' is not supported).
 	 *        {@code null} is required to mark end of filter.
+	 * @param retFileTypeIndex returns selected file type (zero-based); array must be have one element
 	 * @return file path(s) that the user selected; an empty array if canceled;
 	 *         or {@code null} on failures (no dialog shown)
 	 *
-	 * @since 3.7
+	 * @since 3.7.1
 	 */
 	public native static String[] showFileChooser( Window owner, int dark, boolean open,
 		String title, String prompt, String message, String filterFieldLabel,
 		String nameFieldLabel, String nameFieldStringValue, String directoryURL,
 		int optionsSet, int optionsClear, FileChooserCallback callback,
-		int fileTypeIndex, String... fileTypes );
+		int fileTypeIndex, String[] fileTypes, int[] retFileTypeIndex );
 
-	/** @since 3.7 */
+	/** @since 3.7.1 */
 	public interface FileChooserCallback {
-		boolean approve( String[] files, long hwndFileDialog );
+		boolean approve( String[] files, int fileTypeIndex, long hwndFileDialog );
 	}
 
 	/**

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeWindowsLibrary.java

@@ -31,7 +31,7 @@ import com.formdev.flatlaf.util.SystemInfo;
  */
 public class FlatNativeWindowsLibrary
 {
-	private static int API_VERSION_WINDOWS = 1002;
+	private static int API_VERSION_WINDOWS = 1003;
 
 	private static long osBuildNumber = Long.MIN_VALUE;
 
@@ -226,20 +226,21 @@ public class FlatNativeWindowsLibrary
 	 *        Pairs of strings are required for each filter.
 	 *        First string is the display name of the filter shown in the combobox (e.g. "Text Files").
 	 *        Second string is the filter pattern (e.g. "*.txt", "*.exe;*.dll" or "*.*").
+	 * @param retFileTypeIndex returns selected file type (zero-based); array must be have one element
 	 * @return file path(s) that the user selected; an empty array if canceled;
 	 *         or {@code null} on failures (no dialog shown)
 	 *
-	 * @since 3.7
+	 * @since 3.7.1
 	 */
 	public native static String[] showFileChooser( Window owner, boolean open,
 		String title, String okButtonLabel, String fileNameLabel, String fileName,
 		String folder, String saveAsItem, String defaultFolder, String defaultExtension,
 		int optionsSet, int optionsClear, FileChooserCallback callback,
-		int fileTypeIndex, String... fileTypes );
+		int fileTypeIndex, String[] fileTypes, int[] retFileTypeIndex );
 
-	/** @since 3.7 */
+	/** @since 3.7.1 */
 	public interface FileChooserCallback {
-		boolean approve( String[] files, long hwndFileDialog );
+		boolean approve( String[] files, int fileTypeIndex, long hwndFileDialog );
 	}
 
 	/**

flatlaf-core/src/main/java/com/formdev/flatlaf/util/SystemFileChooser.java

@@ -18,6 +18,8 @@ package com.formdev.flatlaf.util;
 
 import java.awt.Component;
 import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Frame;
 import java.awt.KeyboardFocusManager;
 import java.awt.SecondaryLoop;
 import java.awt.Toolkit;
@@ -28,11 +30,13 @@ import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Scanner;
 import java.util.concurrent.atomic.AtomicReference;
+import java.util.regex.Pattern;
 import javax.swing.JDialog;
 import javax.swing.JFileChooser;
 import javax.swing.JOptionPane;
@@ -87,7 +91,8 @@ import com.formdev.flatlaf.ui.FlatNativeWindowsLibrary;
  *   <li>{@link JFileChooser#FILES_AND_DIRECTORIES} is not supported.
  *   <li>{@link #getSelectedFiles()} returns selected file also in single selection mode.
  *       {@link JFileChooser#getSelectedFiles()} only in multi selection mode.
- *   <li>Only file name extension filters (see {@link FileNameExtensionFilter}) are supported.
+ *   <li>Only file name extension filters (see {@link FileNameExtensionFilter}) are supported on all platforms.
+ *   <li>Pattern filters (see {@link PatternFilter}) are only supported on Windows and Linux, but not on macOS.
  *   <li>If adding choosable file filters and {@link #isAcceptAllFileFilterUsed()} is {@code true},
  *       then the <b>All Files</b> filter is placed at the end of the combobox list
  *       (as usual in current operating systems) and the first choosable filter is selected by default.
@@ -584,6 +589,7 @@ public class SystemFileChooser
 	private void checkSupportedFileFilter( FileFilter filter ) throws IllegalArgumentException {
 		if( filter == null ||
 			filter instanceof FileNameExtensionFilter ||
+			filter instanceof PatternFilter ||
 			filter instanceof AcceptAllFileFilter )
 		  return;
 
@@ -607,6 +613,11 @@ public class SystemFileChooser
 		return filters2;
 	}
 
+	private void updateFileFilter( List<FileFilter> filters, int index ) {
+		if( index >= 0 && index < filters.size() )
+			setFileFilter( filters.get( index ) );
+	}
+
 	public ApproveCallback getApproveCallback() {
 		return approveCallback;
 	}
@@ -737,6 +748,9 @@ public class SystemFileChooser
 	}
 
 	private int showDialogImpl( Component parent ) {
+		if( !EventQueue.isDispatchThread() )
+			throw new IllegalStateException( "Must be invoked from the AWT/Swing event dispatch thread" );
+
 		Window owner = (parent instanceof Window)
 			? (Window) parent
 			: (parent != null) ? SwingUtilities.windowForComponent( parent ) : null;
@@ -785,6 +799,16 @@ public class SystemFileChooser
 	{
 		@Override
 		public File[] showDialog( Window owner, SystemFileChooser fc ) {
+			// if there is no displayable window, then AWT's auto-shutdown feature
+			// quits our secondary event loop (see below) immediately
+			// https://docs.oracle.com/en/java/javase/25/docs/api/java.desktop/java/awt/doc-files/AWTThreadIssues.html#Autoshutdown
+			Window dummyWindow = null;
+			if( !hasDisplayableWindow( owner ) ) {
+				// create a (not visible) displayable window to avoid AWT auto-shutdown
+				dummyWindow = new Window( (Frame) null );
+				dummyWindow.addNotify();
+			}
+
 			AtomicReference<String[]> filenamesRef = new AtomicReference<>();
 
 			// create secondary event look and invoke system file dialog on a new thread
@@ -795,6 +819,10 @@ public class SystemFileChooser
 			}, "FlatLaf SystemFileChooser" ).start();
 			secondaryLoop.enter();
 
+			// dispose dummy window to allow AWT to auto-shutdown
+			if( dummyWindow != null )
+				dummyWindow.dispose();
+
 			String[] filenames = filenamesRef.get();
 
 			// fallback to Swing file chooser if system file dialog failed or is not available
@@ -831,6 +859,17 @@ public class SystemFileChooser
 				files[i] = fsv.createFileObject( filenames[i] );
 			return files;
 		}
+
+		private static boolean hasDisplayableWindow( Window owner ) {
+			if( owner != null && owner.isDisplayable() )
+				return true;
+
+			for( Window window : Window.getWindows() ) {
+				if( window.isDisplayable() )
+					return true;
+			}
+			return false;
+		}
 	}
 
 	//---- class WindowsFileChooserProvider -----------------------------------
@@ -890,6 +929,7 @@ public class SystemFileChooser
 			// filter
 			int fileTypeIndex = 0;
 			ArrayList<String> fileTypes = new ArrayList<>();
+			ArrayList<FileFilter> fileTypeFilters = new ArrayList<>();
 			if( !fc.isDirectorySelectionEnabled() ) {
 				List<FileFilter> filters = fc.getFiltersForDialog();
 				if( !filters.isEmpty() ) {
@@ -898,9 +938,15 @@ public class SystemFileChooser
 						if( filter instanceof FileNameExtensionFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*." + String.join( ";*.", ((FileNameExtensionFilter)filter).getExtensions() ) );
+							fileTypeFilters.add( filter );
+						} else if( filter instanceof PatternFilter ) {
+							fileTypes.add( filter.getDescription() );
+							fileTypes.add( String.join( ";", ((PatternFilter)filter).getPatterns() ) );
+							fileTypeFilters.add( filter );
 						} else if( filter instanceof AcceptAllFileFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*.*" );
+							fileTypeFilters.add( filter );
 						}
 					}
 				}
@@ -916,19 +962,24 @@ public class SystemFileChooser
 
 			// callback
 			FlatNativeWindowsLibrary.FileChooserCallback callback = (fc.getApproveCallback() != null)
-				? (files, hwndFileDialog) -> {
+				? (files, fileTypeIndex2, hwndFileDialog) -> {
+					fc.updateFileFilter( fileTypeFilters, fileTypeIndex2 );
 					return invokeApproveCallback( fc, files, new WindowsApproveContext( hwndFileDialog ) );
 				} : null;
 
 			// show system file dialog
-			return FlatNativeWindowsLibrary.showFileChooser( owner, open,
+			int[] retFileTypeIndex = { -1 };
+			String[] result = FlatNativeWindowsLibrary.showFileChooser( owner, open,
 				fc.getDialogTitle(), approveButtonText,
 				fc.getPlatformProperty( WINDOWS_FILE_NAME_LABEL ),
 				fileName, folder, saveAsItem,
 				fc.getPlatformProperty( WINDOWS_DEFAULT_FOLDER ),
 				fc.getPlatformProperty( WINDOWS_DEFAULT_EXTENSION ),
 				optionsSet, optionsClear, callback,
-				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ) );
+				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ), retFileTypeIndex );
+			if( result != null )
+				fc.updateFileFilter( fileTypeFilters, retFileTypeIndex[0] );
+			return result;
 		}
 
 		//---- class WindowsApproveContext ----
@@ -969,6 +1020,26 @@ public class SystemFileChooser
 	private static class MacFileChooserProvider
 		extends SystemFileChooserProvider
 	{
+		@Override
+		public File[] showDialog( Window owner, SystemFileChooser fc ) {
+			// fallback to Swing file chooser if PatternFilter is used
+			boolean usesPatternFilter = (fc.getFileFilter() instanceof PatternFilter);
+			if( !usesPatternFilter ) {
+				for( FileFilter filter : fc.getChoosableFileFilters() ) {
+					if( filter instanceof PatternFilter ) {
+						usesPatternFilter = true;
+						break;
+					}
+				}
+			}
+			if( usesPatternFilter ) {
+				LoggingFacade.INSTANCE.logSevere( "FlatLaf: SystemFileChooser.PatternFilter is not supported on macOS. Using Swing JFileChooser.", null );
+				return new SwingFileChooserProvider().showDialog( owner, fc );
+			}
+
+			return super.showDialog( owner, fc );
+		}
+
 		@Override
 		String[] showSystemDialog( Window owner, SystemFileChooser fc ) {
 			int dark = FlatLaf.isLafDark() ? 1 : 0;
@@ -1013,6 +1084,7 @@ public class SystemFileChooser
 			// filter
 			int fileTypeIndex = 0;
 			ArrayList<String> fileTypes = new ArrayList<>();
+			ArrayList<FileFilter> fileTypeFilters = new ArrayList<>();
 			if( !fc.isDirectorySelectionEnabled() ) {
 				List<FileFilter> filters = fc.getFiltersForDialog();
 				if( !filters.isEmpty() ) {
@@ -1023,10 +1095,12 @@ public class SystemFileChooser
 							for( String ext : ((FileNameExtensionFilter)filter).getExtensions() )
 								fileTypes.add( ext );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
 						} else if( filter instanceof AcceptAllFileFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*" );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
 						}
 					}
 				}
@@ -1034,18 +1108,23 @@ public class SystemFileChooser
 
 			// callback
 			FlatNativeMacLibrary.FileChooserCallback callback = (fc.getApproveCallback() != null)
-				? (files, hwndFileDialog) -> {
+				? (files, fileTypeIndex2, hwndFileDialog) -> {
+					fc.updateFileFilter( fileTypeFilters, fileTypeIndex2 );
 					return invokeApproveCallback( fc, files, new MacApproveContext( hwndFileDialog ) );
 				} : null;
 
 			// show system file dialog
-			return FlatNativeMacLibrary.showFileChooser( owner, dark, open,
+			int[] retFileTypeIndex = { -1 };
+			String[] result = FlatNativeMacLibrary.showFileChooser( owner, dark, open,
 				fc.getDialogTitle(), fc.getApproveButtonText(),
 				fc.getPlatformProperty( MAC_MESSAGE ),
 				fc.getPlatformProperty( MAC_FILTER_FIELD_LABEL ),
 				fc.getPlatformProperty( MAC_NAME_FIELD_LABEL ),
 				nameFieldStringValue, directoryURL, optionsSet, optionsClear, callback,
-				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ) );
+				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ), retFileTypeIndex );
+			if( result != null )
+				fc.updateFileFilter( fileTypeFilters, retFileTypeIndex[0] );
+			return result;
 		}
 
 		//---- class MacApproveContext ----
@@ -1141,6 +1220,7 @@ public class SystemFileChooser
 			// filter
 			int fileTypeIndex = 0;
 			ArrayList<String> fileTypes = new ArrayList<>();
+			ArrayList<FileFilter> fileTypeFilters = new ArrayList<>();
 			if( !fc.isDirectorySelectionEnabled() ) {
 				List<FileFilter> filters = fc.getFiltersForDialog();
 				if( !filters.isEmpty() ) {
@@ -1149,12 +1229,19 @@ public class SystemFileChooser
 						if( filter instanceof FileNameExtensionFilter ) {
 							fileTypes.add( filter.getDescription() );
 							for( String ext : ((FileNameExtensionFilter)filter).getExtensions() )
-								fileTypes.add( caseInsensitiveGlobPattern( ext ) );
+								fileTypes.add( "*." + caseInsensitiveGlobPattern( ext ) );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
+						} else if( filter instanceof PatternFilter ) {
+							fileTypes.add( filter.getDescription() );
+							for( String pattern : ((PatternFilter)filter).getPatterns() )
+								fileTypes.add( caseInsensitiveGlobPattern( pattern ) );
+							fileTypeFilters.add( filter );
 						} else if( filter instanceof AcceptAllFileFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*" );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
 						}
 					}
 				}
@@ -1162,20 +1249,24 @@ public class SystemFileChooser
 
 			// callback
 			FlatNativeLinuxLibrary.FileChooserCallback callback = (fc.getApproveCallback() != null)
-				? (files, hwndFileDialog) -> {
+				? (files, fileTypeIndex2, hwndFileDialog) -> {
+					fc.updateFileFilter( fileTypeFilters, fileTypeIndex2 );
 					return invokeApproveCallback( fc, files, new LinuxApproveContext( hwndFileDialog ) );
 				} : null;
 
 			// show system file dialog
-			return FlatNativeLinuxLibrary.showFileChooser( owner, dark, open,
+			int[] retFileTypeIndex = { -1 };
+			String[] result = FlatNativeLinuxLibrary.showFileChooser( owner, dark, open,
 				fc.getDialogTitle(), approveButtonText, currentName, currentFolder,
 				optionsSet, optionsClear, callback,
-				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ) );
+				fileTypeIndex, fileTypes.toArray( new String[fileTypes.size()] ), retFileTypeIndex );
+			if( result != null )
+				fc.updateFileFilter( fileTypeFilters, retFileTypeIndex[0] );
+			return result;
 		}
 
 		private String caseInsensitiveGlobPattern( String ext ) {
 			StringBuilder buf = new StringBuilder();
-			buf.append( "*." );
 			int len = ext.length();
 			for( int i = 0; i < len; i++ ) {
 				char ch = ext.charAt( i );
@@ -1253,6 +1344,8 @@ public class SystemFileChooser
 	{
 		@Override
 		public File[] showDialog( Window owner, SystemFileChooser fc ) {
+			IdentityHashMap<javax.swing.filechooser.FileFilter, FileFilter> filterMap = new IdentityHashMap<>();
+
 			JFileChooser chooser = new JFileChooser() {
 				@Override
 				public void approveSelection() {
@@ -1273,6 +1366,7 @@ public class SystemFileChooser
 					// callback
 					ApproveCallback approveCallback = fc.getApproveCallback();
 					if( approveCallback != null ) {
+						updateFileFilter( fc, this, filterMap );
 						int result = approveCallback.approve( files, new SwingApproveContext( this ) );
 						if( result == CANCEL_OPTION )
 							return;
@@ -1313,6 +1407,7 @@ public class SystemFileChooser
 						chooser.addChoosableFileFilter( jfilter );
 						if( filter == currentFilter )
 							chooser.setFileFilter( jfilter );
+						filterMap.put( jfilter, filter );
 					}
 				}
 			}
@@ -1340,6 +1435,7 @@ public class SystemFileChooser
 
 			// show dialog
 			int result = chooser.showDialog( owner, null );
+			updateFileFilter( fc, chooser, filterMap );
 
 			// save window size
 			Dimension windowSize = chooser.getSize();
@@ -1361,12 +1457,24 @@ public class SystemFileChooser
 				return new javax.swing.filechooser.FileNameExtensionFilter(
 					((FileNameExtensionFilter)filter).getDescription(),
 					((FileNameExtensionFilter)filter).getExtensions() );
+			} else if( filter instanceof PatternFilter ) {
+				return new SwingGlobFilter(
+					((PatternFilter)filter).getDescription(),
+					((PatternFilter)filter).getPatterns() );
 			} else if( filter instanceof AcceptAllFileFilter )
 				return chooser.getAcceptAllFileFilter();
 			else
 				return null;
 		}
 
+		private void updateFileFilter( SystemFileChooser fc, JFileChooser chooser,
+			IdentityHashMap<javax.swing.filechooser.FileFilter, FileFilter> filterMap )
+		{
+			FileFilter fileFilter = filterMap.get( chooser.getFileFilter() );
+			if( fileFilter != null )
+				fc.setFileFilter( fileFilter );
+		}
+
 		private static boolean checkMustExist( JFileChooser chooser, File[] files ) {
 			for( File file : files ) {
 				if( !file.exists() ) {
@@ -1442,6 +1550,86 @@ public class SystemFileChooser
 					null, buttons, buttons[Math.min( Math.max( defaultButton, 0 ), buttons.length - 1 )] );
 			}
 		}
+
+		//---- class SwingGlobFilter ------------------------------------------
+
+		private static class SwingGlobFilter
+			extends javax.swing.filechooser.FileFilter
+		{
+			private final String description;
+			private final String[] patterns;
+			private Pattern regexPattern;
+
+			SwingGlobFilter( String description, String... patterns ) {
+				this.description = description;
+				this.patterns = patterns;
+			}
+
+			@Override
+			public String getDescription() {
+				return description;
+			}
+
+			@Override
+			public boolean accept( File f ) {
+				if( f == null )
+					return false;
+
+				if( f.isDirectory() )
+					return true;
+
+				initRegexPattern();
+				return regexPattern.matcher( f.getName() ).matches();
+			}
+
+			private void initRegexPattern() {
+				if( regexPattern != null )
+					return;
+
+				StringBuilder buf = new StringBuilder();
+				for( String pattern : patterns ) {
+					if( buf.length() > 0 )
+						buf.append( '|' );
+					glob2regexPattern( pattern, buf );
+				}
+				regexPattern = Pattern.compile( buf.toString(), Pattern.CASE_INSENSITIVE );
+			}
+
+			private static void glob2regexPattern( String globPattern, StringBuilder buf ) {
+				int globLength = globPattern.length();
+
+				// on windows, a pattern ending with "*.*" is equal to ending with "*"
+				if( SystemInfo.isWindows && globPattern.endsWith( "*.*" ) )
+					globLength -= 2;
+
+				for( int i = 0; i < globLength; i++ ) {
+					char ch = globPattern.charAt( i );
+					switch( ch ) {
+						// glob pattern
+						case '*': buf.append( ".*" ); break;
+						case '?': buf.append( '.' ); break;
+
+						// escape special regex characters
+						case '\\':
+						case '.':
+						case '+':
+						case '^':
+						case '$':
+						case '(':
+						case ')':
+						case '{':
+						case '}':
+						case '[':
+						case ']':
+						case '|':
+							buf.append( '\\' ).append( ch );
+							break;
+
+						default: buf.append( ch ); break;
+					}
+				}
+			}
+		}
 	}
 
 	//---- class FileFilter ---------------------------------------------------
@@ -1493,6 +1681,67 @@ public class SystemFileChooser
 		}
 	}
 
+	//---- class PatternFilter ------------------------------------------------
+
+	/**
+	 * A case-insensitive file filter which accepts file patterns containing
+     * the wildcard characters {@code *?} on Windows and Linux.
+     * <ul>
+     *   <li>{@code '*'} matches any sequence of characters.
+     *   <li>{@code '?'} matches any single character.
+     * </ul>
+	 * Sample filters: {@code *.tar.gz} or {@code *_copy.txt}
+	 * <p>
+	 * <b>Warning</b>: This filter is <b>not supported on macOS</b>.
+	 * If used on macOS, the Swing file chooser {@link JFileChooser} is shown
+	 * (instead of macOS file dialog) and a warning is logged.
+	 * To avoid this, do not use this filter on macOS.
+	 * <p>
+	 * E.g.:
+	 * <pre>{@code
+	 * if( SystemInfo.isMacOS )
+	 *     chooser.addChoosableFileFilter( new FileNameExtensionFilter( "Compressed TAR", "tgz" ) );
+	 * else
+	 *     chooser.addChoosableFileFilter( new PatternFilter( "Compressed TAR", "*.tar.gz" ) );
+	 * } );
+	 * }</pre>
+	 *
+	 * @see FileNameExtensionFilter
+	 * @since 3.7.1
+	 */
+	public static final class PatternFilter
+		extends FileFilter
+	{
+		private final String description;
+		private final String[] patterns;
+
+		public PatternFilter( String description, String... patterns ) {
+			if( patterns == null || patterns.length == 0 )
+				throw new IllegalArgumentException( "Missing patterns" );
+			for( String extension : patterns ) {
+				if( extension == null || extension.isEmpty() )
+					throw new IllegalArgumentException( "Pattern is null or empty string" );
+			}
+
+			this.description = description;
+			this.patterns = patterns.clone();
+		}
+
+		@Override
+		public String getDescription() {
+			return description;
+		}
+
+		public String[] getPatterns() {
+			return patterns.clone();
+		}
+
+		@Override
+		public String toString() {
+			return super.toString() + "[description=" + description + " patterns=" + Arrays.toString( patterns ) + "]";
+		}
+	}
+
 	//---- class AcceptAllFileFilter ------------------------------------------
 
 	private static final class AcceptAllFileFilter

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/ApiVersion.cpp

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeLinuxLibrary
-#define API_VERSION_LINUX		3003
+#define API_VERSION_LINUX		3004
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-linux/src/main/cpp/GtkFileChooser.cpp

@@ -33,6 +33,9 @@ extern Window getWindowHandle( JNIEnv* env, JAWT* awt, jobject window, Display**
 // declare internal methods
 static jobjectArray fileListToStringArray( JNIEnv* env, GSList* fileList );
 
+// fields
+static int settingsSchemaInstalled = -1;
+
 //---- helper -----------------------------------------------------------------
 
 #define isOptionSet( option ) ((optionsSet & com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_ ## option) != 0)
@@ -58,6 +61,7 @@ static void initFilters( GtkFileChooser* chooser, JNIEnv* env, jint fileTypeInde
 				gtk_file_chooser_add_filter( chooser, filter );
 				if( fileTypeIndex == filterIndex )
 					gtk_file_chooser_set_filter( chooser, filter );
+				g_object_set_data( G_OBJECT( filter ), "flatlaf-filter-index", GINT_TO_POINTER( filterIndex + 1 ) );
 				filter = NULL;
 				filterIndex++;
 			}
@@ -130,32 +134,42 @@ struct ResponseData {
 	JNIEnv* env;
 	jobject callback;
 	GSList* fileList;
+	int filterIndex;
 
 	ResponseData( JNIEnv* _env, jobject _callback ) {
 		env = _env;
 		callback = _callback;
 		fileList = NULL;
+		filterIndex = -1;
 	}
 };
 
 static void handle_response( GtkWidget* dialog, gint responseId, gpointer data ) {
+	GtkFileChooser* chooser = GTK_FILE_CHOOSER( dialog );
+	ResponseData *response = static_cast<ResponseData*>( data );
+
+	// get selected filter (even if user cancels dialog)
+	GtkFileFilter* filter = gtk_file_chooser_get_filter( chooser );
+	response->filterIndex = (filter != NULL)
+		? GPOINTER_TO_INT( g_object_get_data( G_OBJECT( filter ), "flatlaf-filter-index" ) ) - 1
+		: -1;
+
 	// get filenames if user pressed OK
 	if( responseId == GTK_RESPONSE_ACCEPT ) {
-		ResponseData *response = static_cast<ResponseData*>( data );
 		if( response->callback != NULL ) {
-			GSList* fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+			GSList* fileList = gtk_file_chooser_get_filenames( chooser );
 			jobjectArray files = fileListToStringArray( response->env, fileList );
-
+			jint filterIndex = response->filterIndex;
 			GtkWindow* window = GTK_WINDOW( dialog );
 
 			// invoke callback: boolean approve( String[] files, long hwnd );
 			jclass cls = response->env->GetObjectClass( response->callback );
-			jmethodID approveID = response->env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+			jmethodID approveID = response->env->GetMethodID( cls, "approve", "([Ljava/lang/String;IJ)Z" );
-			if( approveID != NULL && !response->env->CallBooleanMethod( response->callback, approveID, files, window ) )
+			if( approveID != NULL && !response->env->CallBooleanMethod( response->callback, approveID, files, filterIndex, window ) )
 				return; // keep dialog open
 		}
 
-		response->fileList = gtk_file_chooser_get_filenames( GTK_FILE_CHOOSER( dialog ) );
+		response->fileList = gtk_file_chooser_get_filenames( chooser );
 	}
 
 	// hide/destroy file dialog and quit loop
@@ -170,12 +184,29 @@ extern "C"
 JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
 	( JNIEnv* env, jclass cls, jobject owner, jint dark, jboolean open,
 		jstring title, jstring okButtonLabel, jstring currentName, jstring currentFolder,
-		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+		jint optionsSet, jint optionsClear, jobject callback,
+		jint fileTypeIndex, jobjectArray fileTypes, jintArray retFileTypeIndex )
 {
 	// initialize GTK
 	if( !gtk_init_check( NULL, NULL ) )
 		return NULL;
 
+	// check whether required GSettings schemas are installed (e.g. on NixOS)
+	// this avoids output of following message on console, followed by an application crash:
+	//   GLib-GIO-ERROR: No GSettings schemas are installed on the system
+	if( settingsSchemaInstalled < 0 ) {
+		GSettingsSchemaSource* schemaSource = g_settings_schema_source_get_default();
+		GSettingsSchema* schema = (schemaSource != NULL)
+			? g_settings_schema_source_lookup( schemaSource, "org.gtk.Settings.FileChooser", FALSE )
+			: NULL;
+		if( schema != NULL )
+			g_settings_schema_unref( schema );
+
+		settingsSchemaInstalled = (schema != NULL);
+	}
+	if( settingsSchemaInstalled <= 0 )
+		return NULL;
+
 	// convert Java strings to C strings
 	AutoReleaseStringUTF8 ctitle( env, title );
 	AutoReleaseStringUTF8 cokButtonLabel( env, okButtonLabel );
@@ -282,7 +313,11 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrar
 	// start event loop (will be quit in respone handler)
 	gtk_main();
 
-	// canceled?
+	// return selected filter
+	jint selectedFilterIndex = responseData.filterIndex;
+	env->SetIntArrayRegion( retFileTypeIndex, 0, 1, &selectedFilterIndex );
+
+	// return empty array if canceled
 	if( responseData.fileList == NULL )
 		return newJavaStringArray( env, 0 );
 

flatlaf-natives/flatlaf-natives-linux/src/main/headers/com_formdev_flatlaf_ui_FlatNativeLinuxLibrary.h

@@ -64,10 +64,10 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_is
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary
  * Method:    showFileChooser
- * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeLinuxLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeLinuxLibrary/FileChooserCallback;I[Ljava/lang/String;[I)[Ljava/lang/String;
  */
 JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeLinuxLibrary_showFileChooser
-  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray, jintArray);
 
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeLinuxLibrary

flatlaf-natives/flatlaf-natives-macos/src/main/headers/com_formdev_flatlaf_ui_FlatNativeMacLibrary.h

@@ -82,10 +82,10 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_togg
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
  * Method:    showFileChooser
- * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeMacLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ * Signature: (Ljava/awt/Window;IZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeMacLibrary/FileChooserCallback;I[Ljava/lang/String;[I)[Ljava/lang/String;
  */
 JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_showFileChooser
-  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+  (JNIEnv *, jclass, jobject, jint, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray, jintArray);
 
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/ApiVersion.mm

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeMacLibrary
-#define API_VERSION_MACOS		2002
+#define API_VERSION_MACOS		2003
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-macos/src/main/objcpp/MacFileChooser.mm

@@ -35,6 +35,7 @@ static NSArray* getDialogURLs( NSSavePanel* dialog );
 
 @interface FileChooserDelegate : NSObject <NSOpenSavePanelDelegate, NSWindowDelegate> {
 		NSArray* _filters;
+		int _selectedFormatIndex;
 
 		JavaVM* _jvm;
 		jobject _callback;
@@ -43,18 +44,26 @@ static NSArray* getDialogURLs( NSSavePanel* dialog );
 
 	@property (nonatomic, assign) NSSavePanel* dialog;
 
+	- (id) init;
 	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
 		:(NSString*)filterFieldLabel :(bool)showSingleFilterField;
 	- (void) selectFormat: (id)sender;
 	- (void) selectFormatAtIndex: (int)index;
+	- (int) selectedFormatIndex;
 @end
 
 @implementation FileChooserDelegate
 
+	- (id) init {
+		_selectedFormatIndex = -1;
+		return self;
+	}
+
 	- (void) initFilterAccessoryView: (NSMutableArray*)filters :(int)filterIndex
 		:(NSString*)filterFieldLabel :(bool)showSingleFilterField
 	{
 		_filters = filters;
+		_selectedFormatIndex = filterIndex;
 
 		// get filter names
 		NSArray* filterNames = filters.lastObject;
@@ -125,6 +134,12 @@ static NSArray* getDialogURLs( NSSavePanel* dialog );
 		// to support older macOS versions 10.14+ and because of some problems with allowedContentTypes:
 		// https://github.com/chromium/chromium/blob/d8e0032963b7ca4728ff4117933c0feb3e479b7a/components/remote_cocoa/app_shim/select_file_dialog_bridge.mm#L209-232
 		_dialog.allowedFileTypes = [fileTypes containsObject:@"*"] ? nil : fileTypes;
+
+		_selectedFormatIndex = index;
+	}
+
+	- (int) selectedFormatIndex {
+		return _selectedFormatIndex;
 	}
 
 	//---- NSOpenSavePanelDelegate ----
@@ -161,12 +176,13 @@ static NSArray* getDialogURLs( NSSavePanel* dialog );
 		JNI_THREAD_ENTER( _jvm, true )
 
 		jobjectArray files = urlsToStringArray( env, urls );
+		jint selectedFormatIndex = ((FileChooserDelegate*)((NSSavePanel*)sender).delegate).selectedFormatIndex;
 		jlong window = (jlong) sender;
 
 		// invoke callback: boolean approve( String[] files, long hwnd );
 		jclass cls = env->GetObjectClass( _callback );
-		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;IJ)Z" );
-		if( approveID != NULL && !env->CallBooleanMethod( _callback, approveID, files, window ) ) {
+		if( approveID != NULL && !env->CallBooleanMethod( _callback, approveID, files, selectedFormatIndex, window ) ) {
 			_urlsSet = NULL;
 			return false; // keep dialog open
 		}
@@ -265,7 +281,8 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_
 	( JNIEnv* env, jclass cls, jobject owner, jint dark, jboolean open,
 		jstring title, jstring prompt, jstring message, jstring filterFieldLabel,
 		jstring nameFieldLabel, jstring nameFieldStringValue, jstring directoryURL,
-		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+		jint optionsSet, jint optionsClear, jobject callback,
+		jint fileTypeIndex, jobjectArray fileTypes, jintArray retFileTypeIndex )
 {
 	JNI_COCOA_ENTER()
 
@@ -365,17 +382,26 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_
 
 		// show dialog
 		NSModalResponse response = [dialog runModal];
+
+		// return selected filter
+		jint selectedFormatIndex = delegate.selectedFormatIndex;
+		env->SetIntArrayRegion( retFileTypeIndex, 0, 1, &selectedFormatIndex );
+
 		[delegate release];
+
+		// return empty array if canceled
 		if( response != NSModalResponseOK ) {
 			*purls = @[];
 			return;
 		}
 
+		// get selected file(s)
 		*purls = getDialogURLs( dialog );
 
 		JNI_COCOA_CATCH()
 	}];
 
+	// return null on failures
 	if( urls == NULL )
 		return NULL;
 

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/ApiVersion.cpp

@@ -24,7 +24,7 @@
 
 // increase this version if changing API or functionality of native library
 // also update version in Java class com.formdev.flatlaf.ui.FlatNativeWindowsLibrary
-#define API_VERSION_WINDOWS		1002
+#define API_VERSION_WINDOWS		1003
 
 
 //---- JNI methods ------------------------------------------------------------

flatlaf-natives/flatlaf-natives-windows/src/main/cpp/WinFileChooser.cpp

@@ -128,6 +128,11 @@ public:
 		} else
 			files = getFiles( env, false, dialog );
 
+		// get selected filter
+		UINT selectedFileTypeIndex = 0;
+		dialog->GetFileTypeIndex( &selectedFileTypeIndex );
+		jint jselectedFileTypeIndex = selectedFileTypeIndex - 1;
+
 		// get hwnd of file dialog
 		HWND hwndFileDialog = 0;
 		AutoReleasePtr<IOleWindow> window;
@@ -136,10 +141,10 @@ public:
 
 		// invoke callback: boolean approve( String[] files, long hwnd );
 		jclass cls = env->GetObjectClass( callback );
-		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;J)Z" );
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;IJ)Z" );
 		if( approveID == NULL )
 			return S_OK;
-		return env->CallBooleanMethod( callback, approveID, files, hwndFileDialog ) ? S_OK : S_FALSE;
+		return env->CallBooleanMethod( callback, approveID, files, jselectedFileTypeIndex, hwndFileDialog ) ? S_OK : S_FALSE;
 	}
 
 	IFACEMETHODIMP OnFolderChange( IFileDialog* ) { return S_OK; }
@@ -147,7 +152,7 @@ public:
 	IFACEMETHODIMP OnHelp( IFileDialog* ) { return S_OK; }
 	IFACEMETHODIMP OnSelectionChange( IFileDialog* ) { return S_OK; }
 	IFACEMETHODIMP OnShareViolation( IFileDialog*, IShellItem*, FDE_SHAREVIOLATION_RESPONSE* ) { return S_OK; }
-	IFACEMETHODIMP OnTypeChange( IFileDialog*pfd ) { return S_OK; }
+	IFACEMETHODIMP OnTypeChange( IFileDialog* ) { return S_OK; }
 	IFACEMETHODIMP OnOverwrite( IFileDialog*, IShellItem*, FDE_OVERWRITE_RESPONSE* ) { return S_OK; }
 
 	//---- IUnknown methods ----
@@ -213,7 +218,8 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibr
 	( JNIEnv* env, jclass cls, jobject owner, jboolean open,
 		jstring title, jstring okButtonLabel, jstring fileNameLabel, jstring fileName,
 		jstring folder, jstring saveAsItem, jstring defaultFolder, jstring defaultExtension,
-		jint optionsSet, jint optionsClear, jobject callback, jint fileTypeIndex, jobjectArray fileTypes )
+		jint optionsSet, jint optionsClear, jobject callback,
+		jint fileTypeIndex, jobjectArray fileTypes, jintArray retFileTypeIndex )
 {
 	// initialize COM library
 	CoInitializer coInitializer;
@@ -285,6 +291,14 @@ JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibr
 	HWND hwndOwner = (owner != NULL) ? getWindowHandle( env, owner ) : NULL;
 	HRESULT hr = dialog->Show( hwndOwner );
 	dialog->Unadvise( dwCookie );
+
+	// return selected filter
+	UINT selectedFileTypeIndex = 0;
+	CHECK_HRESULT( dialog->GetFileTypeIndex( &selectedFileTypeIndex ) );
+	jint jselectedFileTypeIndex = selectedFileTypeIndex - 1;
+	env->SetIntArrayRegion( retFileTypeIndex, 0, 1, &jselectedFileTypeIndex );
+
+	// return empty array if canceled
 	if( hr == HRESULT_FROM_WIN32(ERROR_CANCELLED) )
 		return newJavaStringArray( env, 0 );
 	CHECK_HRESULT( hr );

flatlaf-natives/flatlaf-natives-windows/src/main/headers/com_formdev_flatlaf_ui_FlatNativeWindowsLibrary.h

@@ -116,10 +116,10 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary
  * Method:    showFileChooser
- * Signature: (Ljava/awt/Window;ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeWindowsLibrary/FileChooserCallback;I[Ljava/lang/String;)[Ljava/lang/String;
+ * Signature: (Ljava/awt/Window;ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IILcom/formdev/flatlaf/ui/FlatNativeWindowsLibrary/FileChooserCallback;I[Ljava/lang/String;[I)[Ljava/lang/String;
  */
 JNIEXPORT jobjectArray JNICALL Java_com_formdev_flatlaf_ui_FlatNativeWindowsLibrary_showFileChooser
-  (JNIEnv *, jclass, jobject, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray);
+  (JNIEnv *, jclass, jobject, jboolean, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jstring, jint, jint, jobject, jint, jobjectArray, jintArray);
 
 /*
  * Class:     com_formdev_flatlaf_ui_FlatNativeWindowsLibrary

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatSystemFileChooserLinuxTest.java

@@ -110,8 +110,8 @@ public class FlatSystemFileChooserLinuxTest
 		}
 		int fileTypeIndex = fileTypeIndexSlider.getValue();
 
-		FlatNativeLinuxLibrary.FileChooserCallback callback = (files, hwndFileDialog) -> {
+		FlatNativeLinuxLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) + "  " + fileTypeIndex2 );
 			if( showMessageDialogOnOKCheckBox.isSelected() ) {
 				System.out.println( FlatNativeLinuxLibrary.showMessageDialog( hwndFileDialog,
 					JOptionPane.INFORMATION_MESSAGE,
@@ -124,24 +124,28 @@ public class FlatSystemFileChooserLinuxTest
 
 		int dark = FlatLaf.isLafDark() ? 1 : 0;
 		if( direct ) {
+			int[] retFileTypeIndex = { -1 };
 			String[] files = FlatNativeLinuxLibrary.showFileChooser( owner, dark, open,
 				title, okButtonLabel, currentName, currentFolder,
-				optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes );
+				optionsSet.get(), optionsClear.get(), callback,
+				fileTypeIndex, fileTypes, retFileTypeIndex );
 
-			filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+			outputResult( files, retFileTypeIndex[0] );
 		} else {
 			SecondaryLoop secondaryLoop = Toolkit.getDefaultToolkit().getSystemEventQueue().createSecondaryLoop();
 
 			String[] fileTypes2 = fileTypes;
 			new Thread( () -> {
+				int[] retFileTypeIndex = { -1 };
 				String[] files = FlatNativeLinuxLibrary.showFileChooser( owner, dark, open,
 					title, okButtonLabel, currentName, currentFolder,
-					optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes2 );
+					optionsSet.get(), optionsClear.get(), callback,
+					fileTypeIndex, fileTypes2, retFileTypeIndex );
 
 				System.out.println( "    secondaryLoop.exit() returned " + secondaryLoop.exit() );
 
 				EventQueue.invokeLater( () -> {
-					filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+					outputResult( files, retFileTypeIndex[0] );
 				} );
 			} ).start();
 
@@ -150,6 +154,11 @@ public class FlatSystemFileChooserLinuxTest
 		}
 	}
 
+	private void outputResult( String[] files, int retFileTypeIndex ) {
+		filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+		filesField.append( "\n\nretFileTypeIndex " + retFileTypeIndex );
+	}
+
 	private static String n( String s ) {
 		return s != null && !s.isEmpty() ? s : null;
 	}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatSystemFileChooserMacTest.java

@@ -145,8 +145,8 @@ public class FlatSystemFileChooserMacTest
 		}
 		int fileTypeIndex = fileTypeIndexSlider.getValue();
 
-		FlatNativeMacLibrary.FileChooserCallback callback = (files, hwndFileDialog) -> {
+		FlatNativeMacLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) + "  " + fileTypeIndex2 );
 			if( showMessageDialogOnOKCheckBox.isSelected() ) {
 				int result = FlatNativeMacLibrary.showMessageDialog( hwndFileDialog,
 					JOptionPane.INFORMATION_MESSAGE,
@@ -160,26 +160,30 @@ public class FlatSystemFileChooserMacTest
 
 		int dark = FlatLaf.isLafDark() ? 1 : 0;
 		if( direct ) {
+			int[] retFileTypeIndex = { -1 };
 			String[] files = FlatNativeMacLibrary.showFileChooser( owner, dark, open,
 				title, prompt, message, filterFieldLabel,
 				nameFieldLabel, nameFieldStringValue, directoryURL,
-				optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes );
+				optionsSet.get(), optionsClear.get(), callback,
+				fileTypeIndex, fileTypes, retFileTypeIndex );
 
-			filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+			outputResult( files, retFileTypeIndex[0] );
 		} else {
 			SecondaryLoop secondaryLoop = Toolkit.getDefaultToolkit().getSystemEventQueue().createSecondaryLoop();
 
 			String[] fileTypes2 = fileTypes;
 			new Thread( () -> {
+				int[] retFileTypeIndex = { -1 };
 				String[] files = FlatNativeMacLibrary.showFileChooser( owner, dark, open,
 					title, prompt, message, filterFieldLabel,
 					nameFieldLabel, nameFieldStringValue, directoryURL,
-					optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes2 );
+					optionsSet.get(), optionsClear.get(), callback,
+					fileTypeIndex, fileTypes2, retFileTypeIndex );
 
 				System.out.println( "    secondaryLoop.exit() returned " + secondaryLoop.exit() );
 
 				SwingUtilities.invokeLater( () -> {
-					filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+					outputResult( files, retFileTypeIndex[0] );
 				} );
 			} ).start();
 
@@ -188,6 +192,11 @@ public class FlatSystemFileChooserMacTest
 		}
 	}
 
+	private void outputResult( String[] files, int retFileTypeIndex ) {
+		filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+		filesField.append( "\n\nretFileTypeIndex " + retFileTypeIndex );
+	}
+
 	private static String n( String s ) {
 		return s != null && !s.isEmpty() ? s : null;
 	}

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatSystemFileChooserTest.java

@@ -234,7 +234,9 @@ public class FlatSystemFileChooserTest
 		for( int i = 0; i < fileTypes.length; i += 2 ) {
 			fc.addChoosableFileFilter( "*".equals( fileTypes[i+1] )
 				? fc.getAcceptAllFileFilter()
-				: new SystemFileChooser.FileNameExtensionFilter( fileTypes[i], fileTypes[i+1].split( ";" ) ) );
+				: ((fileTypes[i+1].indexOf( '*' ) >= 0 || fileTypes[i+1].indexOf( '?' ) >= 0)
+					? new SystemFileChooser.PatternFilter( fileTypes[i], fileTypes[i+1].split( ";" ) )
+					: new SystemFileChooser.FileNameExtensionFilter( fileTypes[i], fileTypes[i+1].split( ";" ) )) );
 		}
 		SystemFileChooser.FileFilter[] filters = fc.getChoosableFileFilters();
 		if( filters.length > 0 )
@@ -310,7 +312,8 @@ public class FlatSystemFileChooserTest
 			"result", result,
 			"currentDirectory", fc.getCurrentDirectory(),
 			"selectedFile", fc.getSelectedFile(),
-			"selectedFiles", fc.getSelectedFiles() );
+			"selectedFiles", fc.getSelectedFiles(),
+			"fileFilter", fc.getFileFilter() );
 	}
 
 	private void outputSwingFileChooser( String type, JFileChooser fc, int result ) {
@@ -319,7 +322,8 @@ public class FlatSystemFileChooserTest
 			"result", result,
 			"currentDirectory", fc.getCurrentDirectory(),
 			"selectedFile", fc.getSelectedFile(),
-			"selectedFiles", fc.getSelectedFiles() );
+			"selectedFiles", fc.getSelectedFiles(),
+			"fileFilter", fc.getFileFilter() );
 	}
 
 	private void outputAWTFileChooser( FileDialog fc ) {

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatSystemFileChooserWindowsTest.java

@@ -131,8 +131,8 @@ public class FlatSystemFileChooserWindowsTest
 			fileTypes = fileTypesStr.trim().split( "[,]+" );
 		int fileTypeIndex = fileTypeIndexSlider.getValue();
 
-		FlatNativeWindowsLibrary.FileChooserCallback callback = (files, hwndFileDialog) -> {
+		FlatNativeWindowsLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) + "  " + fileTypeIndex2 );
 			if( showMessageDialogOnOKCheckBox.isSelected() ) {
 				System.out.println( FlatNativeWindowsLibrary.showMessageDialog( hwndFileDialog,
 					JOptionPane.INFORMATION_MESSAGE,
@@ -142,26 +142,30 @@ public class FlatSystemFileChooserWindowsTest
 		};
 
 		if( direct ) {
+			int[] retFileTypeIndex = { -1 };
 			String[] files = FlatNativeWindowsLibrary.showFileChooser( owner, open,
 				title, okButtonLabel, fileNameLabel, fileName,
 				folder, saveAsItem, defaultFolder, defaultExtension,
-				optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes );
+				optionsSet.get(), optionsClear.get(), callback,
+				fileTypeIndex, fileTypes, retFileTypeIndex );
 
-			filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+			outputResult( files, retFileTypeIndex[0] );
 		} else {
 			SecondaryLoop secondaryLoop = Toolkit.getDefaultToolkit().getSystemEventQueue().createSecondaryLoop();
 
 			String[] fileTypes2 = fileTypes;
 			new Thread( () -> {
+				int[] retFileTypeIndex = { -1 };
 				String[] files = FlatNativeWindowsLibrary.showFileChooser( owner, open,
 					title, okButtonLabel, fileNameLabel, fileName,
 					folder, saveAsItem, defaultFolder, defaultExtension,
-					optionsSet.get(), optionsClear.get(), callback, fileTypeIndex, fileTypes2 );
+					optionsSet.get(), optionsClear.get(), callback,
+					fileTypeIndex, fileTypes2, retFileTypeIndex );
 
 				System.out.println( "    secondaryLoop.exit() returned " + secondaryLoop.exit() );
 
 				EventQueue.invokeLater( () -> {
-					filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+					outputResult( files, retFileTypeIndex[0] );
 				} );
 			} ).start();
 
@@ -170,6 +174,11 @@ public class FlatSystemFileChooserWindowsTest
 		}
 	}
 
+	private void outputResult( String[] files, int retFileTypeIndex ) {
+		filesField.setText( (files != null) ? Arrays.toString( files ).replace( ',', '\n' ) : "null" );
+		filesField.append( "\n\nretFileTypeIndex " + retFileTypeIndex );
+	}
+
 	private static String n( String s ) {
 		return s != null && !s.isEmpty() ? s : null;
 	}