How i can get pressed a key moving the sprite

SDL Development
1

I want that when I’m pressing a key , the sprites moves even I don’t press.
I have a sprite moving in the screen but I have to be pressing the same key
many times to walk.

void Teclado(void)
{
SDL_Event evento;

    if (SDL_PollEvent(&evento))                    
     {
     if (evento.type == SDL_KEYDOWN)     
     {     
      switch (evento.key.keysym.sym)  
      {
       case SDLK_UP:  posy=posy-10 ; orientacion=norte; break;    
       case SDLK_DOWN: posy=posy+10 ; orientacion= sur; break;  
       case SDLK_LEFT: posx=posx-10 ; orientacion=oeste; break;    
       case SDLK_RIGHT: posx=posx+10 ; orientacion=este; break;    
       case SDLK_ESCAPE:  encendido=false ; break;              
      }
      
     }
    } 
 return ;

}

2

Basically, you have to watch the SDL_KEYUP event, so you know when the key
is not being pressed.
SDL events occurs only once (SDL_KEYUP, SDL_KEYDOWN, etc), so when you have
an SDL_KEYUP, you know that the key was pressed and now it is released.

Take a look here:
http://gpwiki.org/index.php/SDL:Tutorials:Practical_Keyboard_Input

Leonardo.

2008/11/16 Carlitox > I want that when I’m pressing a key , the sprites moves even I don’t press.

I have a sprite moving in the screen but I have to be pressing the same key
many times to walk.

void Teclado(void)
{
SDL_Event evento;

   if (SDL_PollEvent(&evento))
    {
    if (evento.type == SDL_KEYDOWN)
    {
     switch (evento.key.keysym.sym)
     {
      case SDLK_UP:  posy=posy-10 ; orientacion=norte; break;
      case SDLK_DOWN: posy=posy+10 ; orientacion= sur; break;
      case SDLK_LEFT: posx=posx-10 ; orientacion=oeste; break;
      case SDLK_RIGHT: posx=posx+10 ; orientacion=este; break;
      case SDLK_ESCAPE:  encendido=false ; break;
     }

    }
   }
return ;

}

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SDL at lists.libsdl.org
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3

Or you can use SDL_GetKeyState

Regards

Vinicius Jarina
viniciusjarina.googlepages.comOn Mon, Nov 17, 2008 at 9:10 AM, Leonardo Guilherme < leonardo.guilherme at gmail.com> wrote:

Basically, you have to watch the SDL_KEYUP event, so you know when the key
is not being pressed.
SDL events occurs only once (SDL_KEYUP, SDL_KEYDOWN, etc), so when you have
an SDL_KEYUP, you know that the key was pressed and now it is released.

Take a look here:
http://gpwiki.org/index.php/SDL:Tutorials:Practical_Keyboard_Input

Leonardo.

2008/11/16 Carlitox

I want that when I’m pressing a key , the sprites moves even I don’t press.

I have a sprite moving in the screen but I have to be pressing the same
key
many times to walk.

void Teclado(void)
{
SDL_Event evento;

   if (SDL_PollEvent(&evento))
    {
    if (evento.type == SDL_KEYDOWN)
    {
     switch (evento.key.keysym.sym)
     {
      case SDLK_UP:  posy=posy-10 ; orientacion=norte; break;
      case SDLK_DOWN: posy=posy+10 ; orientacion= sur; break;
      case SDLK_LEFT: posx=posx-10 ; orientacion=oeste; break;
      case SDLK_RIGHT: posx=posx+10 ; orientacion=este; break;
      case SDLK_ESCAPE:  encendido=false ; break;
     }

    }
   }
return ;

}

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

4

Hello !

I want that when I’m pressing a key , the sprites moves even I don’t press.
I have a sprite moving in the screen but I have to be pressing the same key
many times to walk.

A way to solve this is to define a boolean for every
direction :

bool up = false;
bool down = false;
bool left = false;
bool right = false;

Then when you get a KeyDown Event for as
an example the up key, then you set up = true
and when you get a KeyUp Event for the up Key
you set up = false

Now in your gameloop you ask okay is up == true
then move the sprite in the up direction.

CU

5

Basically, you have to watch the SDL_KEYUP event, so you know when the key
is not being pressed.
SDL events occurs only once (SDL_KEYUP, SDL_KEYDOWN, etc), so when you have
an SDL_KEYUP, you know that the key was pressed and now it is released.

Yet another way would be to enable SDL_EnableKeyRepeat.On Mon, Nov 17, 2008 at 6:10 AM, Leonardo Guilherme <leonardo.guilherme at gmail.com> wrote:

–
http://pphaneuf.livejournal.com/

6

Basically, you have to watch the SDL_KEYUP event, so you know when
the key
is not being pressed.
SDL events occurs only once (SDL_KEYUP, SDL_KEYDOWN, etc), so when
you have
an SDL_KEYUP, you know that the key was pressed and now it is
released.

Yet another way would be to enable SDL_EnableKeyRepeat.

In my experience, key repeat produces very not-smooth animations when
you use it to perform continuous movement. I use the boolean method.

– ScottOn Nov 17, 2008, at 8:21 AM, Pierre Phaneuf wrote:

On Mon, Nov 17, 2008 at 6:10 AM, Leonardo Guilherme <leonardo.guilherme at gmail.com> wrote: