Debugger: Add work notification hook to UserInterface.

UserInterface:
- Add new hook function used to notify the UI that some form of
  background work is taking place for informational purposes,
  i.e. no interaction required. Implement accordingly in
  GraphicalUserInterface.

src/apps/debugger/user_interface/UserInterface.h

@@ -66,6 +66,15 @@ public:
 	virtual	void				NotifyUser(const char* title,
 									const char* message,
 									user_notification_type type) = 0;
+	virtual	void				NotifyBackgroundWorkStatus(const char* message)
+									= 0;
+									// this is used to inform the user about
+									// background processing work, but doesn't
+									// otherwise require any form of
+									// user interaction, i.e. for a status bar
+									// to indicate that debug information is
+									// being parsed.
+
 	virtual	int32				SynchronouslyAskUser(const char* title,
 									const char* message, const char* choice1,
 									const char* choice2, const char* choice3)

src/apps/debugger/user_interface/cli/CommandLineUserInterface.cpp

@@ -203,6 +203,12 @@ CommandLineUserInterface::NotifyUser(const char* title, const char* message,
 }
 
 
+void
+CommandLineUserInterface::NotifyBackgroundWorkStatus(const char* message)
+{
+}
+
+
 int32
 CommandLineUserInterface::SynchronouslyAskUser(const char* title,
 	const char* message, const char* choice1, const char* choice2,

src/apps/debugger/user_interface/cli/CommandLineUserInterface.h

@@ -42,6 +42,8 @@ public:
 	virtual	void				NotifyUser(const char* title,
 									const char* message,
 									user_notification_type type);
+	virtual	void				NotifyBackgroundWorkStatus(
+									const char* message);
 	virtual	int32				SynchronouslyAskUser(const char* title,
 									const char* message, const char* choice1,
 									const char* choice2, const char* choice3);

src/apps/debugger/user_interface/gui/GraphicalUserInterface.cpp

@@ -248,6 +248,13 @@ GraphicalUserInterface::NotifyUser(const char* title, const char* message,
 }
 
 
+void
+GraphicalUserInterface::NotifyBackgroundWorkStatus(const char* message)
+{
+	fTeamWindow->DisplayBackgroundStatus(message);
+}
+
+
 int32
 GraphicalUserInterface::SynchronouslyAskUser(const char* title,
 	const char* message, const char* choice1, const char* choice2,

src/apps/debugger/user_interface/gui/GraphicalUserInterface.h

@@ -1,6 +1,6 @@
 /*
  * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
- * Copyright 2014, Rene Gollent, rene@gollent.com.
+ * Copyright 2014-2015, Rene Gollent, rene@gollent.com.
  * Distributed under the terms of the MIT License.
  */
 #ifndef GRAPHICAL_USER_INTERFACE_H
@@ -38,6 +38,8 @@ public:
 	virtual	void				NotifyUser(const char* title,
 									const char* message,
 									user_notification_type type);
+	virtual	void				NotifyBackgroundWorkStatus(
+									const char* message);
 	virtual	int32				SynchronouslyAskUser(const char* title,
 									const char* message, const char* choice1,
 									const char* choice2, const char* choice3);