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Good SDL string input

Butterman · 2007-03-08T15:33:35

Hey, Ive been trying to input into strings using SDL. At the moment im directly checking each letter in every loop. This is working, but i have come to a problem. To slow down presses i put in an SDL_Delay() after each key press. This improves the input. It keeps everythin nice and smooth. So when pressing "A" i dont end up with "AAAAAA" on the input. But even delaying after each press isnt working. Sometimes i have to wait before the next key. Or Sometimes it still goes too fast and i end up with sentances like "Hhheo Wrrrld". At first i tried an string input tutorial on LazyFoo. But the entire setup did not work well with my game code. I am not using a loop to poll events. But simply checking every key, every game loop. Is there an easy way to fix up this entire process? So my input is fast and responsive like windows? Thanks.

General and Gameplay Programming Programming

Started by Butterman March 07, 2007 01:54 PM

12 comments, last by Vorpy 17 years, 1 month ago

Butterman

132

Author

March 08, 2007 12:03 PM

I tried your method Wave but it wouldnt compile.

So i went on and tried somthing simple like this

      while (SDL_PollEvent(&event))   {    if( event.type == SDL_KEYDOWN )         {       switch(event.key.keysym.sym){                    case SDLK_a:            str = str + 'a';            break;                         }                              }                     }

And it maybe will catch one or two out of a hundread keystrokes? Be aware this has just been dropped straight into my Update loop.

Game Development Tutorials, a few good game development tutorials located on my site.

Vorpy

869

March 08, 2007 01:25 PM

It will catch every keystroke exactly once.

Butterman

132

Author

March 08, 2007 02:43 PM

Its realy not... It is quite hard to actually catch a single keystroke...

Game Development Tutorials, a few good game development tutorials located on my site.

Vorpy

869

March 08, 2007 03:33 PM

It should be catching every single keystroke. The keyboard generates events every time a key is pressed or released. The operating system sends these events to the program, and SDL generates the corresponding event which is then placed in the event queue. The only way to not detect a keystroke is if the keyboard doesn't detect it or there is a glitch in the software somewhere.

Good SDL string input

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Good SDL string input

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