Platform: added Application and WindowlessApplication aliases.

If only one *Application or Windowless*Application header is included,
the class is aliased to Application or WindowlessApplication to simplify
porting.

doc/portability.dox

@@ -164,9 +164,12 @@ mouse movement events etc.
 
 In most cases the entry point is classic `main()` function, but some platforms
 (e.g. Native Client) have different requirements. To make things easier, entry
-points are handled using macros, which take care of the rest. Each application
+points are handled using macros, which take care of the rest.
-has its own specific macro and if no other application header is included, the
+
-macro is also aliased to MAGNUM_APPLICATION_MAIN() to save you typing.
+If only one `*Application` or `*WindowlessApplication` header is included, the
+application class is aliased to `Platform::Application` or `Platform::WindowlessApplication`
+and the macro is aliased to `MAGNUM_APPLICATION_MAIN()` or `MAGNUM_WINDOWLESSAPPLICATION_MAIN()`
+to simplify porting.
 
 Example application, which targets both embedded Linux (using plain X and EGL)
 and desktop (using SDL2 toolkit). Thanks to static polymorphism most of the
@@ -179,15 +182,9 @@ particular *Event class implementations:
 #include <Platform/XEglApplication.h>
 #endif
 
-#ifndef MAGNUM_TARGET_GLES
+class MyApplication: public Platform::Application {
-typedef Platform::Sdl2Application ApplicationBase;
-#else
-typedef Platform::XEglApplication ApplicationBase;
-#endif
-
-class MyApplication: public ApplicationBase {
     public:
-        MyApplication(int& argc, char** argv): ApplicationBase(argc, argv, "My Application") {
+        MyApplication(int& argc, char** argv): Platform::Application(argc, argv, "My Application") {
             // ...
         }
 

src/Platform/GlutApplication.h

@@ -60,6 +60,10 @@ class MyApplication: public Magnum::Platform::GlutApplication {
 };
 MAGNUM_GLUTAPPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::Application` and the macro is aliased to `MAGNUM_APPLICATION_MAIN()`
+to simplify porting.
 */
 class GlutApplication {
     public:
@@ -386,6 +390,7 @@ When no other application header is included this macro is also aliased to
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_APPLICATION_MAIN
+typedef GlutApplication Application;
 #define MAGNUM_APPLICATION_MAIN(className) MAGNUM_GLUTAPPLICATION_MAIN(className)
 #else
 #undef MAGNUM_APPLICATION_MAIN

src/Platform/GlxApplication.h

@@ -50,6 +50,10 @@ class MyApplication: public Magnum::Platform::GlxApplication {
 };
 MAGNUM_GLXAPPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::Application` and the macro is aliased to `MAGNUM_APPLICATION_MAIN()`
+to simplify porting.
 */
 class GlxApplication: public AbstractXApplication {
     public:
@@ -87,6 +91,7 @@ When no other application header is included this macro is also aliased to
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_APPLICATION_MAIN
+typedef GlxApplication Application;
 #define MAGNUM_APPLICATION_MAIN(className) MAGNUM_GLXAPPLICATION_MAIN(className)
 #else
 #undef MAGNUM_APPLICATION_MAIN

src/Platform/NaClApplication.h

@@ -67,6 +67,10 @@ class MyApplication: public Magnum::Platform::Sdl2Application {
 };
 MAGNUM_NACLAPPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::Application` and the macro is aliased to `MAGNUM_APPLICATION_MAIN()`
+to simplify porting.
 */
 class NaClApplication: public pp::Instance, public pp::Graphics3DClient, public pp::MouseLock {
     public:
@@ -483,6 +487,7 @@ When no other application header is included this macro is also aliased to
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_APPLICATION_MAIN
+typedef NaClApplication Application;
 #define MAGNUM_APPLICATION_MAIN(className) MAGNUM_NACLAPPLICATION_MAIN(className)
 #else
 #undef MAGNUM_APPLICATION_MAIN

src/Platform/Sdl2Application.h

@@ -62,6 +62,10 @@ class MyApplication: public Magnum::Platform::Sdl2Application {
 };
 MAGNUM_SDL2APPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::Application` and the macro is aliased to `MAGNUM_APPLICATION_MAIN()`
+to simplify porting.
 */
 class Sdl2Application {
     public:
@@ -435,6 +439,7 @@ When no other application header is included this macro is also aliased to
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_APPLICATION_MAIN
+typedef Sdl2Application Application;
 #define MAGNUM_APPLICATION_MAIN(className) MAGNUM_SDL2APPLICATION_MAIN(className)
 #else
 #undef MAGNUM_APPLICATION_MAIN

src/Platform/WindowlessGlxApplication.h

@@ -55,6 +55,10 @@ class MyApplication: public Magnum::Platform::WindowlessGlxApplication {
 };
 MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::WindowlessApplication` and the macro is aliased to
+`MAGNUM_WINDOWLESSAPPLICATION_MAIN()` to simplify porting.
 */
 class WindowlessGlxApplication {
     public:
@@ -107,6 +111,7 @@ aliased to `MAGNUM_WINDOWLESSAPPLICATION_MAIN()`.
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_WINDOWLESSAPPLICATION_MAIN
+typedef WindowlessGlxApplication WindowlessApplication;
 #define MAGNUM_WINDOWLESSAPPLICATION_MAIN(className) MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN(className)
 #else
 #undef MAGNUM_WINDOWLESSAPPLICATION_MAIN

src/Platform/XEglApplication.h

@@ -50,6 +50,10 @@ class MyApplication: public Magnum::Platform::XEglApplication {
 };
 MAGNUM_XEGLAPPLICATION_MAIN(MyApplication)
 @endcode
+
+If no other application header is included this class is also aliased to
+`Platform::Application` and the macro is aliased to `MAGNUM_APPLICATION_MAIN()`
+to simplify porting.
 */
 class XEglApplication: public AbstractXApplication {
     public:
@@ -87,6 +91,7 @@ When no other application header is included this macro is also aliased to
 
 #ifndef DOXYGEN_GENERATING_OUTPUT
 #ifndef MAGNUM_APPLICATION_MAIN
+typedef XEglApplication Application;
 #define MAGNUM_APPLICATION_MAIN(className) MAGNUM_XEGLAPPLICATION_MAIN(className)
 #else
 #undef MAGNUM_APPLICATION_MAIN