System File Chooser: update current filter before invoking approve callback and after closing dialog (issue #1065)

.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 +3,8 @@ FlatLaf Change Log
 
 ## 3.7.1-SNAPSHOT
 
+- System File Chooser: Update current filter before invoking approve callback
+  and after closing dialog. (issue #1065)
 - 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 optionsClear options to clear; see {@code FOS_*} constants
+	 * @param optionsSet options to set; see {@code FC_*} 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.
@@ -117,20 +117,21 @@ public class FlatNativeMacLibrary
 	 *        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 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

@@ -28,6 +28,7 @@ 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;
@@ -607,6 +608,11 @@ 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;
 	}
@@ -890,6 +896,7 @@ 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 +905,11 @@ 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 AcceptAllFileFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*.*" );
+							fileTypeFilters.add( filter );
 						}
 					}
 				}
@@ -916,19 +925,24 @@ 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 ----
@@ -1013,6 +1027,7 @@ 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 +1038,12 @@ 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 +1051,23 @@ 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 +1163,7 @@ 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() ) {
@@ -1151,10 +1174,12 @@ public class SystemFileChooser
 							for( String ext : ((FileNameExtensionFilter)filter).getExtensions() )
 								fileTypes.add( caseInsensitiveGlobPattern( ext ) );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
 						} else if( filter instanceof AcceptAllFileFilter ) {
 							fileTypes.add( filter.getDescription() );
 							fileTypes.add( "*" );
 							fileTypes.add( null );
+							fileTypeFilters.add( filter );
 						}
 					}
 				}
@@ -1162,15 +1187,20 @@ 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 ) {
@@ -1253,6 +1283,8 @@ 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 +1305,7 @@ 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 +1346,7 @@ public class SystemFileChooser
 						chooser.addChoosableFileFilter( jfilter );
 						if( filter == currentFilter )
 							chooser.setFileFilter( jfilter );
+						filterMap.put( jfilter, filter );
 					}
 				}
 			}
@@ -1340,6 +1374,7 @@ public class SystemFileChooser
 
 			// show dialog
 			int result = chooser.showDialog( owner, null );
+			updateFileFilter( fc, chooser, filterMap );
 
 			// save window size
 			Dimension windowSize = chooser.getSize();
@@ -1367,6 +1402,14 @@ public class SystemFileChooser
 				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() ) {

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

@@ -58,6 +58,7 @@ 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 +131,42 @@ 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" );
-			if( approveID != NULL && !response->env->CallBooleanMethod( response->callback, approveID, files, window ) )
+			jmethodID approveID = response->env->GetMethodID( cls, "approve", "([Ljava/lang/String;IJ)Z" );
+			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
@@ -170,7 +181,8 @@ 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 ) )
@@ -282,7 +294,11 @@ 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" );
-		if( approveID != NULL && !env->CallBooleanMethod( _callback, approveID, files, window ) ) {
+		jmethodID approveID = env->GetMethodID( cls, "approve", "([Ljava/lang/String;IJ)Z" );
+		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) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+		FlatNativeLinuxLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
+			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) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+		FlatNativeMacLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
+			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

@@ -310,7 +310,8 @@ 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 +320,8 @@ 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) -> {
-			System.out.println( "  -- callback " + hwndFileDialog + "  " + Arrays.toString( files ) );
+		FlatNativeWindowsLibrary.FileChooserCallback callback = (files, fileTypeIndex2, hwndFileDialog) -> {
+			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;
 	}