Instead of destroying the BAboutWindow object on close, Hide() it, then on the destructor of the calling window call Quit() explicitly to destroy it.

headers/private/shared/AboutWindow.h

@@ -17,8 +17,7 @@ class BHandler;
 
 class BAboutWindow : public BWindow {
  public:
-							BAboutWindow(BHandler* handler,
+							BAboutWindow(const char* appName,
-								const char* appName, 
 								const char* signature);
 	virtual					~BAboutWindow();
 

src/apps/activitymonitor/ActivityView.cpp

@@ -1112,22 +1112,16 @@ ActivityView::MessageReceived(BMessage* message)
 
 	switch (message->what) {
 		case B_ABOUT_REQUESTED:
-		{
-			bool quit = false;
-			if (message->FindBool("quit", &quit) == B_OK && quit) {
-				fAboutWindow = NULL;
-				break;
-			}
-
 			if (fAboutWindow == NULL) {
-				fAboutWindow = new BAboutWindow(this, kAppName, kSignature);
+				fAboutWindow = new BAboutWindow(kAppName, kSignature);
 				fAboutWindow->AddCopyright(2008, "Haiku, Inc.");
 				fAboutWindow->Show();
-			} else
+			} else if (fAboutWindow->IsHidden())
+				fAboutWindow->Show();
+			else
 				fAboutWindow->Activate();
 
 			break;
-		}
 
 		case kMsgUpdateResolution:
 		{

src/apps/deskcalc/CalcView.cpp

@@ -270,13 +270,6 @@ CalcView::MessageReceived(BMessage* message)
 
 			// (replicant) about box requested
 			case B_ABOUT_REQUESTED:
-			{
-				bool quit = false;
-				if (message->FindBool("quit", &quit) == B_OK && quit) {
-					fAboutWindow = NULL;
-					break;
-				}
-
 				if (fAboutWindow == NULL) {
 					// create the about window
 					const char* extraCopyrights[] = {
@@ -284,15 +277,16 @@ CalcView::MessageReceived(BMessage* message)
 						NULL
 					};
 
-					fAboutWindow = new BAboutWindow(this, kAppName, kSignature);
+					fAboutWindow = new BAboutWindow(kAppName, kSignature);
 					fAboutWindow->AddCopyright(2006, "Haiku, Inc.",
 						extraCopyrights);
 					fAboutWindow->Show();
-				} else
+				} else if (fAboutWindow->IsHidden())
+					fAboutWindow->Show();
+				else
 					fAboutWindow->Activate();
 
 				break;
-			}
 
 			case MSG_UNFLASH_KEY:
 			{

src/apps/processcontroller/ProcessController.cpp

@@ -426,13 +426,6 @@ ProcessController::MessageReceived(BMessage *message)
 		}
 
 		case B_ABOUT_REQUESTED:
-		{
-			bool quit = false;
-			if (message->FindBool("quit", &quit) == B_OK && quit) {
-				fAboutWindow = NULL;
-				break;
-			}
-
 			if (fAboutWindow == NULL) {
 				const char* extraCopyrights[] = {
 					"1997-2001 Georges-Edouard Berenger",
@@ -444,16 +437,17 @@ ProcessController::MessageReceived(BMessage *message)
 					NULL
 				};
 
-				fAboutWindow = new BAboutWindow(this,
+				fAboutWindow = new BAboutWindow(
 					B_TRANSLATE_SYSTEM_NAME("ProcessController"), kSignature);
 				fAboutWindow->AddCopyright(2007, "Haiku, Inc.", extraCopyrights);
 				fAboutWindow->AddAuthors(authors);
 				fAboutWindow->Show();
-			} else
+			} else if (fAboutWindow->IsHidden())
+				fAboutWindow->Show();
+			else
 				fAboutWindow->Activate();
 
 			break;
-		}
 
 		default:
 			BView::MessageReceived(message);

src/kits/shared/AboutWindow.cpp

@@ -254,11 +254,10 @@ AboutView::AppIcon(const char* signature)
 //	#pragma mark -
 
 
-BAboutWindow::BAboutWindow(BHandler* handler, const char* appName, const char* signature)
+BAboutWindow::BAboutWindow(const char* appName, const char* signature)
 	:	BWindow(BRect(0.0, 0.0, 200.0, 140.0), appName, B_TITLED_WINDOW,
 		B_ASYNCHRONOUS_CONTROLS | B_NOT_ZOOMABLE | B_NOT_RESIZABLE
-			| B_AUTO_UPDATE_SIZE_LIMITS),
+			| B_AUTO_UPDATE_SIZE_LIMITS)
-		fCaller(handler)
 {
 	_Init(appName, signature);
 }
@@ -275,18 +274,9 @@ BAboutWindow::~BAboutWindow()
 bool
 BAboutWindow::QuitRequested()
 {
-	if (fCaller != NULL) {
+	Hide();
-		status_t status;
-		BMessenger messenger(fCaller, NULL, &status);
-		if (status == B_OK && messenger.IsValid()) {
-			BMessage* message = new BMessage(B_ABOUT_REQUESTED);
-			message->AddBool("quit", true);
-			messenger.SendMessage(message);
-			delete message;
-		}
-	}
 
-	return true;
+	return false;
 }
 
 

src/preferences/locale/LocalePreflet.cpp

@@ -73,13 +73,6 @@ LocalePreflet::MessageReceived(BMessage* message)
 			break;
 
 		case B_ABOUT_REQUESTED:
-		{
-			bool quit = false;
-			if (message->FindBool("quit", &quit) == B_OK && quit) {
-				fAboutWindow = NULL;
-				break;
-			}
-
 			if (fAboutWindow == NULL) {
 				const char* authors[] = {
 					"Axel Dörfler",
@@ -88,15 +81,16 @@ LocalePreflet::MessageReceived(BMessage* message)
 					NULL
 				};
 
-				fAboutWindow = new BAboutWindow(this, kAppName, kSignature);
+				fAboutWindow = new BAboutWindow(kAppName, kSignature);
 				fAboutWindow->AddCopyright(2005, "Haiku, Inc.");
 				fAboutWindow->AddAuthors(authors);
 				fAboutWindow->Show();
-			} else
+			} else if (fAboutWindow->IsHidden())
+				fAboutWindow->Show();
+			else
 				fAboutWindow->Activate();
 
 			break;
-		}
 
 		default:
 			BApplication::MessageReceived(message);