make more rich graphical window

example/gui-linux/main.go

@@ -94,7 +94,7 @@ func run(ctx context.Context) error {
 	}
 
 	runtime.LockOSThread()
-	vm.StartGraphicApplication(960, 600)
+	vm.StartGraphicApplication(960, 600, vz.WithWindowTitle("Linux"), vz.WithController(true))
 	runtime.UnlockOSThread()
 
 	cleanup()

example/macOS/main.go

@@ -117,7 +117,7 @@ func runVM(ctx context.Context) error {
 		log.Println("finished cleanup")
 	}
 
-	vm.StartGraphicApplication(960, 600)
+	vm.StartGraphicApplication(960, 600, vz.WithWindowTitle("macOS"), vz.WithController(true))
 
 	cleanup()
 

virtualization.go

@@ -360,16 +360,55 @@ func (v *VirtualMachine) Stop() error {
 	return <-errCh
 }
 
+type startGraphicApplicationOptions struct {
+	title            string
+	enableController bool
+}
+
+// StartGraphicApplicationOption is an option for display graphics start.
+type StartGraphicApplicationOption func(*startGraphicApplicationOptions) error
+
+// WithWindowTitle is an option to set window title of display graphics window.
+func WithWindowTitle(title string) StartGraphicApplicationOption {
+	return func(sgao *startGraphicApplicationOptions) error {
+		sgao.title = title
+		return nil
+	}
+}
+
+// WithController is an option to set virtual machine controller on graphics window toolbar.
+func WithController(enable bool) StartGraphicApplicationOption {
+	return func(sgao *startGraphicApplicationOptions) error {
+		sgao.enableController = enable
+		return nil
+	}
+}
+
 // StartGraphicApplication starts an application to display graphics of the VM.
 //
 // You must to call runtime.LockOSThread before calling this method.
 //
 // This is only supported on macOS 12 and newer, error will be returned on older versions.
-func (v *VirtualMachine) StartGraphicApplication(width, height float64) error {
+func (v *VirtualMachine) StartGraphicApplication(width, height float64, opts ...StartGraphicApplicationOption) error {
 	if err := macOSAvailable(12); err != nil {
 		return err
 	}
-	C.startVirtualMachineWindow(objc.Ptr(v), C.double(width), C.double(height))
+	defaultOpts := &startGraphicApplicationOptions{}
+	for _, opt := range opts {
+		if err := opt(defaultOpts); err != nil {
+			return err
+		}
+	}
+	windowTitle := charWithGoString(defaultOpts.title)
+	defer windowTitle.Free()
+	C.startVirtualMachineWindow(
+		objc.Ptr(v),
+		v.dispatchQueue,
+		C.double(width),
+		C.double(height),
+		windowTitle.CString(),
+		C.bool(defaultOpts.enableController),
+	)
 	return nil
 }
 

virtualization_12.h

@@ -45,4 +45,4 @@ void setKeyboardsVZVirtualMachineConfiguration(void *config,
 void setAudioDevicesVZVirtualMachineConfiguration(void *config,
     void *audioDevices);
 
-void startVirtualMachineWindow(void *machine, double width, double height);
+void startVirtualMachineWindow(void *machine, void *queue, double width, double height, const char *title, bool enableController);

virtualization_12.m

@@ -343,18 +343,22 @@ void setVZVirtioFileSystemDeviceConfigurationShare(void *config, void *share)
     RAISE_UNSUPPORTED_MACOS_EXCEPTION();
 }
 
-void startVirtualMachineWindow(void *machine, double width, double height)
+void startVirtualMachineWindow(void *machine, void *queue, double width, double height, const char *title, bool enableController)
 {
     // Create a shared app instance.
     // This will initialize the global variable
     // 'NSApp' with the application instance.
     [VZApplication sharedApplication];
     if (@available(macOS 12, *)) {
         @autoreleasepool {
+            NSString *windowTitle = [NSString stringWithUTF8String:title];
             AppDelegate *appDelegate = [[[AppDelegate alloc]
                 initWithVirtualMachine:(VZVirtualMachine *)machine
+                                 queue:(dispatch_queue_t)queue
                            windowWidth:(CGFloat)width
-                          windowHeight:(CGFloat)height] autorelease];
+                          windowHeight:(CGFloat)height
+                           windowTitle:windowTitle
+                      enableController:enableController] autorelease];
 
             NSApp.delegate = appDelegate;
             [NSApp run];

virtualization_view.h

@@ -24,8 +24,11 @@
 @end
 
 API_AVAILABLE(macos(12.0))
-@interface AppDelegate : NSObject <NSApplicationDelegate, NSWindowDelegate, VZVirtualMachineDelegate>
+@interface AppDelegate : NSObject <NSApplicationDelegate, NSWindowDelegate, VZVirtualMachineDelegate, NSToolbarDelegate>
 - (instancetype)initWithVirtualMachine:(VZVirtualMachine *)virtualMachine
+                                 queue:(dispatch_queue_t)queue
                            windowWidth:(CGFloat)windowWidth
-                          windowHeight:(CGFloat)windowHeight;
+                          windowHeight:(CGFloat)windowHeight
+                           windowTitle:(NSString *)windowTitle
+                      enableController:(BOOL)enableController;
 @end