SDL Menu

SDL Development
1

ok,here im with some new question, and also a exemple that works,

im making a simple game, now im working on the menu, i make a code that works, but i tink that not is the best way to do that, and now want that you guys say waht you tink about this.

here is what it does it print 3 menu options:

iniciar
continuar
opcoes

when you press “Up” our “Down” you move on the 3 options, the selected option is printed in RED, and the others in brown.

for this i create a variable (menupos, that starts with value 1 (iniciar))

im also include a screenshot to you guys see the result, im using Sfont to draw the text…

now, how to make this more clean ? and more fast, because i tink that it uses a lot of resources.

thanks for your help.

here come the source:----------------------------------------------

int menu(){
menuinicio:;

show_img(“imagens/menu.bmp”, 0, 100); //print background menu image(menu.bmp)

//load fonts:—>
SFont_Font* fVermel;
SFont_Font* fMarrom;
fMarrom = SFont_InitFont(IMG_Load(“fontes/marrong.png”));
fVermel = SFont_InitFont(IMG_Load(“fontes/arial_red_24_b.png”));
//<—end load Font

//print menu options
SFont_Write(screen, fVermel, 25, 340, “Iniciar”);
SFont_Write(screen, fMarrom, 25, 380, “Continuar”);
SFont_Write(screen, fMarrom, 25, 420, “Opcoes”);

SDL_UpdateRect(screen, 0, 0, 0, 0); //update all

int done=0;
int menupos=1;
while(done == 0)
{
SDL_Event event;
while ( SDL_PollEvent(&event) )
{
if ( event.type == SDL_QUIT ) { done = 1; }
if ( event.type == SDL_KEYDOWN )
{
if ( event.key.keysym.sym == SDLK_ESCAPE ) { done = 1; }
}
}
Uint8* keys;
keys = SDL_GetKeyState(NULL);

// printf(“valor de menupos: %d .\n”, menupos ); //just for debug test

SDL_Delay(100);
if ( keys[SDLK_UP] ) {menupos = menupos--;

if (menupos <= 1){menupos =1;}
if (menupos == 1){
SFont_Write(screen, fVermel, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fMarrom, 25, 420,  "Opcoes");
SDL_UpdateRect(screen, 0, 0, 0, 0);
					}
					
if (menupos == 2){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fVermel, 25, 380,  "Continuar");
SFont_Write(screen, fMarrom, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
			   	}

if (menupos == 3){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fVermel, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
	
	
	
       	   	}
}
if ( keys[SDLK_DOWN] ) {menupos = menupos++;

if (menupos >= 3){menupos =3;}
if (menupos == 1){
SFont_Write(screen, fVermel, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fMarrom, 25, 420,  "Opcoes");
SDL_UpdateRect(screen, 0, 0, 0, 0);
					}
if (menupos == 2){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fVermel, 25, 380,  "Continuar");
SFont_Write(screen, fMarrom, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
			   	}

if (menupos == 3){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fVermel, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
			   	}

					
}
	if ( keys[SDLK_RETURN] ){if (menupos == 3){
	show_img("imagens/tvteste.bmp", 0, 8000);
	SDL_UpdateRect(screen, 0, 0, 0, 0);
goto menuinicio;
 	}
}

}
SDL_Delay(300);
}

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2

Here’s some psuedo-code. If you’re familiar with vectors and
iterators, you should probably have menupos be an iterator.

//variables
Vector buttons;
int menupos = 0;

//init button vector
buttons.push_back(“buttonA”);
buttons.push_back(“buttonB”);
buttons.push_back(“buttonC”);

//events
if(SDLK_UP)
{
menupos–;
//if went past the beginning, wrap to bottom
if(menupos < 0)
{
menupos = buttons.size()-1;
}
}
else if(SDLK_DOWN)
{
menupos++;
//if went past the end, wrap to top
if(menupos >= buttons.size())
{
menupos = 0;
}
}

//render
for(int i = 0; i < buttons.size(); i++)
{
if(i == menupos)
{
//use hilighted color
text(buttons.at(i), COLOR_RED);
}
else
{
//normal color
text(buttons.at(i), COLOR_BROWN);
}
}

— Ricardo Rodrigues wrote:> ok,here im with some new question, and also a exemple that

works,

im making a simple game, now im working on the menu, i make a
code that works, but i tink that not is the best way to do
that, and now want that you guys say waht you tink about this.

here is what it does it print 3 menu options:

iniciar
continuar
opcoes

when you press “Up” our “Down” you move on the 3 options, the
selected option is printed in RED, and the others in brown.

for this i create a variable (menupos, that starts with value
1 (iniciar))

im also include a screenshot to you guys see the result, im
using Sfont to draw the text…

now, how to make this more clean ? and more fast, because i
tink that it uses a lot of resources.

thanks for your help.

here come the source:

int menu(){
menuinicio:;

show_img(“imagens/menu.bmp”, 0, 100); //print background menu
image(menu.bmp)

//load fonts:—>
SFont_Font* fVermel;
SFont_Font* fMarrom;
fMarrom = SFont_InitFont(IMG_Load(“fontes/marrong.png”));
fVermel =
SFont_InitFont(IMG_Load(“fontes/arial_red_24_b.png”));
//<—end load Font

//print menu options
SFont_Write(screen, fVermel, 25, 340, “Iniciar”);
SFont_Write(screen, fMarrom, 25, 380, “Continuar”);
SFont_Write(screen, fMarrom, 25, 420, “Opcoes”);

SDL_UpdateRect(screen, 0, 0, 0, 0); //update all

int done=0;
int menupos=1;
while(done == 0)
{
SDL_Event event;
while ( SDL_PollEvent(&event) )
{
if ( event.type == SDL_QUIT ) { done = 1; }
if ( event.type == SDL_KEYDOWN )
{
if ( event.key.keysym.sym == SDLK_ESCAPE ) { done = 1;
}
}
}
Uint8* keys;
keys = SDL_GetKeyState(NULL);

// printf(“valor de menupos: %d .\n”, menupos ); //just for
debug test

SDL_Delay(100);
if ( keys[SDLK_UP] ) {menupos = menupos–;

  if (menupos <= 1){menupos =1;}
  if (menupos == 1){

SFont_Write(screen, fVermel, 25, 340, “Iniciar”);
SFont_Write(screen, fMarrom, 25, 380, “Continuar”);
SFont_Write(screen, fMarrom, 25, 420, “Opcoes”);
SDL_UpdateRect(screen, 0, 0, 0, 0);
}

  if (menupos == 2){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fVermel, 25, 380,  "Continuar");
SFont_Write(screen, fMarrom, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
			   	}

if (menupos == 3){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fVermel, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
	
	
	
       	   	}
}
if ( keys[SDLK_DOWN] ) {menupos = menupos++;

if (menupos >= 3){menupos =3;}
if (menupos == 1){

SFont_Write(screen, fVermel, 25, 340, “Iniciar”);
SFont_Write(screen, fMarrom, 25, 380, “Continuar”);
SFont_Write(screen, fMarrom, 25, 420, “Opcoes”);
SDL_UpdateRect(screen, 0, 0, 0, 0);
}
if (menupos == 2){
SFont_Write(screen, fMarrom, 25, 340, “Iniciar”);
SFont_Write(screen, fVermel, 25, 380, “Continuar”);
SFont_Write(screen, fMarrom, 25, 420, “Opcoes”);
SDL_UpdateRect(screen, 0, 0, 0, 0);
}

if (menupos == 3){
SFont_Write(screen, fMarrom, 25, 340,  "Iniciar");
SFont_Write(screen, fMarrom, 25, 380,  "Continuar");
SFont_Write(screen, fVermel, 25, 420,  "Opcoes"); 
SDL_UpdateRect(screen, 0, 0, 0, 0);
			   	}

					
}
	if ( keys[SDLK_RETURN] ){if (menupos == 3){
	show_img("imagens/tvteste.bmp", 0, 8000);
	SDL_UpdateRect(screen, 0, 0, 0, 0);
goto menuinicio;
 	}

}

}
SDL_Delay(300);
}

ATTACHMENT part 2 image/jpeg name=tela_2_low.jpg

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