core: implement Application::ShowPointer() so that applications can choose

whether to use the system mouse pointer or not.

src/application/application.cpp

@@ -58,6 +58,11 @@ Application::Application(char const *name, ivec2 resolution, float framerate)
     data = new ApplicationData(name, resolution, framerate);
 }
 
+void Application::ShowPointer(bool show)
+{
+    data->app.ShowPointer(show);
+}
+
 void Application::Run()
 {
     data->app.Run();

src/application/application.h

@@ -27,6 +27,7 @@ public:
     Application(char const *name, ivec2 resolution, float framerate);
     ~Application();
 
+    void ShowPointer(bool show);
     void Run();
 
 private:

src/platform/ps3/ps3app.cpp

@@ -109,6 +109,11 @@ Ps3App::Ps3App(char const *title, ivec2 res, float fps) :
 #endif
 }
 
+void Ps3App::ShowPointer(bool show)
+{
+    ;
+}
+
 void Ps3App::Run()
 {
     while (!Ticker::Finished())

src/platform/ps3/ps3app.h

@@ -29,6 +29,7 @@ public:
     Ps3App(char const *title, ivec2 res, float fps);
     virtual ~Ps3App();
 
+    void ShowPointer(bool show);
     void Run();
 
 private:

src/platform/sdl/sdlapp.cpp

@@ -62,7 +62,6 @@ SdlApp::SdlApp(char const *title, ivec2 res, float fps) :
     }
 
     SDL_WM_SetCaption(title, NULL);
-    SDL_ShowCursor(0);
 
     /* Initialise everything */
     Ticker::Setup(fps);
@@ -74,6 +73,11 @@ SdlApp::SdlApp(char const *title, ivec2 res, float fps) :
 #endif
 }
 
+void SdlApp::ShowPointer(bool show)
+{
+    SDL_ShowCursor(show ? 1 : 0);
+}
+
 void SdlApp::Run()
 {
     while (!Ticker::Finished())

src/platform/sdl/sdlapp.h

@@ -29,6 +29,7 @@ public:
     SdlApp(char const *title, ivec2 res, float fps);
     virtual ~SdlApp();
 
+    void ShowPointer(bool show);
     void Run();
 
 private: