gd06-02.cpp

游戏开发数据结构-Data.Structures.for.Game.Programmers

        // increment the current index, because we inserted
        // an item before the current node.
        g_current++;

        // reset the timer
        g_time = SDL_GetTicks();

        // set the state
        g_state = BINSERTMOVE;

        g_gui->GetItem(0)->SetVisibility( false );
        g_gui->GetItem(1)->SetVisibility( false );
        g_gui->GetItem(2)->SetVisibility( false );
        g_gui->GetItem(3)->SetVisibility( false );
        g_gui->GetItem(4)->SetVisibility( false );
        g_gui->GetItem(5)->SetVisibility( false );
        g_gui->GetItem(6)->SetVisibility( false );
        g_gui->GetItem(8)->SetVisibility( true );
    }
}

void InsertAfter()
{
    if( g_list.Size() < 8 && g_itr.Valid() )
    {
        // insert new data.
        g_list.InsertAfter( g_itr, rand() % 100 );

        // reset the timer
        g_time = SDL_GetTicks();

        // set the state
        g_state = INSERTMOVE;

        g_gui->GetItem(0)->SetVisibility( false );
        g_gui->GetItem(1)->SetVisibility( false );
        g_gui->GetItem(2)->SetVisibility( false );
        g_gui->GetItem(3)->SetVisibility( false );
        g_gui->GetItem(4)->SetVisibility( false );
        g_gui->GetItem(5)->SetVisibility( false );
        g_gui->GetItem(6)->SetVisibility( false );
        g_gui->GetItem(8)->SetVisibility( true );
    }
}

void Remove()
{
    if( g_list.Size() > 2 && g_itr.Valid() )
    {
        // reset the timer
        g_time = SDL_GetTicks();

        // set the state
        g_state = REMOVEMOVEDOWN;

        g_gui->GetItem(0)->SetVisibility( false );
        g_gui->GetItem(1)->SetVisibility( false );
        g_gui->GetItem(2)->SetVisibility( false );
        g_gui->GetItem(3)->SetVisibility( false );
        g_gui->GetItem(4)->SetVisibility( false );
        g_gui->GetItem(5)->SetVisibility( false );
        g_gui->GetItem(6)->SetVisibility( false );
        g_gui->GetItem(10)->SetVisibility( true );
    }
}


void Continue()
{
    switch( g_state )
    {
    case INSERTNEWNODE:
        g_state = INSERTPOINT;
        g_time = SDL_GetTicks();
        g_gui->GetItem(8)->SetVisibility( false );
        g_gui->GetItem(9)->SetVisibility( true );
        break;

    case INSERTDONE:
        g_gui->GetItem(0)->SetVisibility( true );
        g_gui->GetItem(1)->SetVisibility( true );
        g_gui->GetItem(2)->SetVisibility( true );
        g_gui->GetItem(3)->SetVisibility( true );
        g_gui->GetItem(4)->SetVisibility( true );
        g_gui->GetItem(5)->SetVisibility( true );
        g_gui->GetItem(6)->SetVisibility( true );
        g_gui->GetItem(7)->SetVisibility( false );
        g_gui->GetItem(9)->SetVisibility( false );
        g_state = NOSTATE;
        break;

    case BINSERTNEWNODE:
        g_state = BINSERTPOINT;
        g_time = SDL_GetTicks();
        g_gui->GetItem(8)->SetVisibility( false );
        g_gui->GetItem(9)->SetVisibility( true );
        break;

    case BINSERTDONE:
        g_gui->GetItem(0)->SetVisibility( true );
        g_gui->GetItem(1)->SetVisibility( true );
        g_gui->GetItem(2)->SetVisibility( true );
        g_gui->GetItem(3)->SetVisibility( true );
        g_gui->GetItem(4)->SetVisibility( true );
        g_gui->GetItem(5)->SetVisibility( true );
        g_gui->GetItem(6)->SetVisibility( true );
        g_gui->GetItem(7)->SetVisibility( false );
        g_gui->GetItem(9)->SetVisibility( false );
        g_state = NOSTATE;
        break;

    case REMOVEPOINT:
        g_state = REMOVEMOVE;
        g_gui->GetItem(10)->SetVisibility( false );
        g_gui->GetItem(11)->SetVisibility( true );
        g_time = SDL_GetTicks();
        break;
       
    case REMOVEDONE:
        g_gui->GetItem(0)->SetVisibility( true );
        g_gui->GetItem(1)->SetVisibility( true );
        g_gui->GetItem(2)->SetVisibility( true );
        g_gui->GetItem(3)->SetVisibility( true );
        g_gui->GetItem(4)->SetVisibility( true );
        g_gui->GetItem(5)->SetVisibility( true );
        g_gui->GetItem(6)->SetVisibility( true );
        g_gui->GetItem(7)->SetVisibility( false );
        g_gui->GetItem(11)->SetVisibility( false );
        g_state = NOSTATE;
        break;
    }
}



// ============================================================================
//  Main
// ============================================================================
int main( int argc, char* argv[] )
{
    // declare coordinates.
    int x, y;

    srand( time( 0 ) );
 
    // initialise the list with 5 items
    for( x = 0; x < 5; x++ )
    {
        g_list.Append( rand() % 100 );
    }

    // initialise the iterator
    g_itr = g_list.GetIterator();
    g_itr.Start();


    // declare event holder
    SDL_Event event;

    // set our at exit function
    atexit( SDL_Quit );

    //initialize systems
    SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER );
    TTF_Init();

    // create the GUI and set the caption.
    g_gui = new SDLGUI( WIDTH, HEIGHT, ITEMS, WHITE );
    SDL_WM_SetCaption( PROGRAM_NAME, 0); 

    // add the font
    g_gui->SetFont( "arial.ttf", ARIAL, 22, TTF_STYLE_NORMAL );
    g_gui->SetFont( "arial.ttf", BIGARIAL, 30, TTF_STYLE_NORMAL );

    
    // load the bmps
    g_blackcircle = SDL_LoadBMP( "circleblack.bmp" );
    g_redcircle =   SDL_LoadBMP( "circlered.bmp" );


    // set the color keys of the BMPs
    SDL_SetColorKey( g_blackcircle, SDL_SRCCOLORKEY, 
                     SDL_MapRGB( g_blackcircle->format, 255, 255, 255 ));
    SDL_SetColorKey( g_redcircle, SDL_SRCCOLORKEY, 
                     SDL_MapRGB( g_redcircle->format, 255, 255, 255 ));


    // add your GUI items here.

    // iterator commands
    g_gui->AddButton( 72, 468, "gbup.bmp", "gbdown.bmp", "Start", 
                       ARIAL, BLACK, WHITE, Start );
    g_gui->AddButton( 200, 468, "gbup.bmp", "gbdown.bmp", "End", 
                       ARIAL, BLACK, WHITE, End );
    g_gui->AddButton( 72, 532, "gbup.bmp", "gbdown.bmp", "Back", 
                       ARIAL, BLACK, WHITE, Back );
    g_gui->AddButton( 200, 532, "gbup.bmp", "gbdown.bmp", "Forth", 
                       ARIAL, BLACK, WHITE, Forth );



    // list commands
    g_gui->AddButton( 472, 468, "gbup.bmp", "gbdown.bmp", "Insert Before", 
                       ARIAL, BLACK, WHITE, InsertBefore );
    g_gui->AddButton( 600, 468, "gbup.bmp", "gbdown.bmp", "Insert After", 
                       ARIAL, BLACK, WHITE, InsertAfter );
    g_gui->AddButton( 536, 532, "gbup.bmp", "gbdown.bmp", "Remove", 
                       ARIAL, BLACK, WHITE, Remove );


    g_gui->AddButton( 336, 500, "gbup.bmp", "gbdown.bmp", "Continue", 
                       ARIAL, BLACK, WHITE, Continue );


    g_gui->AddLabel( 256, 64, "First create a new node.",
                     BIGARIAL, BLACK, WHITE );
    g_gui->AddLabel( 226, 64, "Then re-arrange the pointers.",
                     BIGARIAL, BLACK, WHITE );
    g_gui->AddLabel( 226, 64, "First re-arrange the pointers.",
                     BIGARIAL, BLACK, WHITE );
    g_gui->AddLabel( 226, 64, "Then delete the node",
                     BIGARIAL, BLACK, WHITE );

    



    g_gui->GetItem(7)->SetVisibility( false );
    g_gui->GetItem(8)->SetVisibility( false );
    g_gui->GetItem(9)->SetVisibility( false );
    g_gui->GetItem(10)->SetVisibility( false );
    g_gui->GetItem(11)->SetVisibility( false );

    // main message loop.
    while( 1 )
    {
        //look for an event
        if( SDL_PollEvent( &event ) )
        {
            //an event was found
            if( event.type == SDL_QUIT ) 
                break;
            if( event.type == SDL_MOUSEBUTTONDOWN ) 
            {
                // get the mouse state.
                SDL_GetMouseState( &x, &y );

                // tell the GUI that a button has been pressed
                g_gui->MouseDown( x, y );
            }
            if( event.type == SDL_MOUSEBUTTONUP ) 
            {
                // get the mouse state.
                SDL_GetMouseState( &x, &y );

                // tell the GUI that a button has been released
                g_gui->MouseUp( x, y );

            }
            if( event.type == SDL_KEYDOWN )
            {
                // a key was pressed.
                if( event.key.keysym.sym == SDLK_ESCAPE )
                {
                    // if ESC was pressed, quit the program.
                    SDL_Event quit;
                    quit.type = SDL_QUIT;
                    SDL_PushEvent( &quit );
                }


                // tell the GUI that a key was pressed.
                g_gui->KeyDown( event.key.keysym.sym, 
                                event.key.keysym.mod,
                                event.key.keysym.unicode );
            }
        }   // end event loop.

        // tell the GUI to redraw itself
        g_gui->Draw();


        // time-based state transitions.
        if( g_state == INSERTMOVE && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = INSERTNEWNODE;
            g_gui->GetItem(7)->SetVisibility( true );
        }
        if( g_state == BINSERTMOVE && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = BINSERTNEWNODE;
            g_gui->GetItem(7)->SetVisibility( true );
        }
        if( g_state == INSERTPOINT && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = INSERTDONE;
        }
        if( g_state == BINSERTPOINT && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = BINSERTDONE;
        }
        if( g_state == REMOVEMOVEDOWN && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = REMOVEPOINT;
            g_gui->GetItem(7)->SetVisibility( true );
        }
        if( g_state == REMOVEMOVE && (SDL_GetTicks() - g_time) >= 1000 )
        {
            g_state = REMOVEDONE;
            g_list.Remove( g_itr );
            g_gui->GetItem(7)->SetVisibility( true );
        }

        // calculate the coordinates of the list.
        // first calculate the size:
        if( g_state != INSERTMOVE && 
            g_state != REMOVEMOVE && 
            g_state != BINSERTMOVE )
        {
            x = g_list.Size() * g_blackcircle->w * 2;
        }
        else
        {
            if( g_state == INSERTMOVE || g_state == BINSERTMOVE )
            {
                x = (g_list.Size() - 1) * g_blackcircle->w * 2;
                x += ( (SDL_GetTicks() - g_time) * g_blackcircle->w * 2 ) / 1000;
            }
            if( g_state == REMOVEMOVE )
            {
                x = g_list.Size() * g_blackcircle->w * 2;
                x -= ( (SDL_GetTicks() - g_time) * g_blackcircle->w * 2 ) / 1000;
            }
        }

        // now calculate x position
        x = (WIDTH - x) / 2;
        y = 250;

        DrawList( g_list, x, y, g_current );

        // tell the GUI to update itself
        g_gui->Update();
    }
  
    // done
    return 0;
}