sdlguiframe.cpp

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

// ============================================================================
// Data Structures For Game Programmers
// Ron Penton
// SDLGUIFrame.cpp
// A Basic Framework for using the SDLGUI library.
// ============================================================================
#include "SDLGUI.h"


// ============================================================================
//  Global Constants
// ============================================================================
const char PROGRAM_NAME[]   = "INSERT PROGRAM NAME HERE";
const int WIDTH             = 640;
const int HEIGHT            = 480;
const int ITEMS             = 32;


// ============================================================================
//  Global Variables
// ============================================================================
SDLGUI* g_gui;


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

    // 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 your GUI items here.




    // 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 );
            }
        }   // end event loop.

        // do all game-related stuff here.



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



        // DO ALL YOUR RENDERING HERE



        // tell the GUI to update itself
        g_gui->Update();

    }
  
    // done
    return 0;
}