macOS native: added FlatNativeMacLibrary.windowToggleFullScreen() for easier testing

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

@@ -63,4 +63,5 @@ public class FlatNativeMacLibrary
 	public native static int getWindowButtonAreaWidth( Window window );
 	public native static int getWindowTitleBarHeight( Window window );
 	public native static boolean isWindowFullScreen( Window window );
+	public native static boolean windowToggleFullScreen( Window window );
 }

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/DemoFrame.java

@@ -46,6 +46,7 @@ import com.formdev.flatlaf.icons.FlatAbstractIcon;
 import com.formdev.flatlaf.themes.FlatMacDarkLaf;
 import com.formdev.flatlaf.themes.FlatMacLightLaf;
 import com.formdev.flatlaf.extras.FlatSVGUtils;
+import com.formdev.flatlaf.ui.FlatNativeMacLibrary;
 import com.formdev.flatlaf.util.ColorFunctions;
 import com.formdev.flatlaf.util.FontUtils;
 import com.formdev.flatlaf.util.LoggingFacade;
@@ -960,6 +961,11 @@ class DemoFrame
 				System.out.println( "m drag" );
 			}
 		} );
+		if( SystemInfo.isMacOS && FlatNativeMacLibrary.isLoaded() ) {
+			showToggleButton.addActionListener( e -> {
+				FlatNativeMacLibrary.windowToggleFullScreen( this );
+			} );
+		}
 
 		// add "Users" button to menubar
 		FlatButton usersButton = new FlatButton();

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

@@ -53,6 +53,14 @@ JNIEXPORT jint JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_getWindo
 JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWindowFullScreen
   (JNIEnv *, jclass, jobject);
 
+/*
+ * Class:     com_formdev_flatlaf_ui_FlatNativeMacLibrary
+ * Method:    windowToggleFullScreen
+ * Signature: (Ljava/awt/Window;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_windowToggleFullScreen
+  (JNIEnv *, jclass, jobject);
+
 #ifdef __cplusplus
 }
 #endif

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

@@ -328,3 +328,23 @@ JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_isWi
 bool isWindowFullScreen( NSWindow* nsWindow ) {
 	return ((nsWindow.styleMask & NSWindowStyleMaskFullScreen) != 0);
 }
+
+extern "C"
+JNIEXPORT jboolean JNICALL Java_com_formdev_flatlaf_ui_FlatNativeMacLibrary_windowToggleFullScreen
+	( JNIEnv* env, jclass cls, jobject window )
+{
+	JNI_COCOA_ENTER()
+
+	NSWindow* nsWindow = getNSWindow( env, cls, window );
+	if( nsWindow == NULL )
+		return FALSE;
+
+	[FlatJNFRunLoop performOnMainThreadWaiting:NO withBlock:^(){
+		[nsWindow toggleFullScreen:nil];
+	}];
+
+	return TRUE;
+
+	JNI_COCOA_EXIT()
+	return FALSE;
+}