An Example Screen Saver

Here's sample code that implements a screen saver that blanks the screen. This is pretty boring, so you'll probably want to change the Draw() function to do something cute.

/* Minimal screen saver example. */ #include <add-ons/screen_saver/ScreenSaver.h> #include <interface/StringView.h> #include <BeBuild.h> extern "C" { _EXPORT BScreenSaver *instantiate_screen_saver( BMessage *msg, image_id id ); } class MinimalSaver : public BScreenSaver { public:    MinimalSaver( BMessage *archive, image_id image );    virtual ~MinimalSaver( void );        virtual void StartConfig( BView *view );    virtual status_t StartSaver( BView *view, bool preview );    virtual void Draw( BView *view, int32 frame ); }; BScreenSaver *instantiate_screen_saver( BMessage *msg, image_id id ) {    return new MinimalSaver( msg, id ); } MinimalSaver::MinimalSaver( BMessage *archive, image_id image )    : BScreenSaver( archive, image ) {    /* Nothing else to do here... */ } MinimalSaver::~MinimalSaver( void ) {    /* Nothing else to do here... */ } void MinimalSaver::StartConfig( BView *view ) {    view->AddChild( new BStringView( BRect( 10, 10, 200, 35 ),                                     B_EMPTY_STRING,                                     "Minimal Saver" ) ); } status_t MinimalSaver::StartSaver( BView *view, bool preview ) {    /* We're so minimal, we don't have a preview. */    if( preview ) return B_ERROR;    return B_OK; } void MinimalSaver::Draw( BView *view, int32 frame ) {    if( frame == 0 ) {       /* Fill the screen with black on the first frame: */       view->SetLowColor( 0, 0, 0 );       view->FillRect( view->Bounds(), B_SOLID_LOW );    } }