Page 1 of 1
SDL Mouse States
Posted: Wed Sep 01, 2010 9:55 am
by RandomDever
All I need is a boolean that is true if the left mouse button is down and false if the left mouse button is up.
I can't find it.
Please Help!
Re: SDL Mouse States
Posted: Wed Sep 01, 2010 10:06 am
by pritam
I can't give you an example by ready-to-go code, but you need to track the mouse states, something like this:
Code: Select all
bool lmbPressed = false; // lmb == left mouse button
if( g_Event.type == SDL_MOUSEBUTTONDOWN && SDL_BUTTON(SDL_GetMouseState(NULL,NULL)) == SDL_BUTTON_LEFT ) {
lmbPressed = true;
}
if( g_Event.type == SDL_MOUSEBUTTONUP ) {
lmbPressed = false;
}
Re: SDL Mouse States
Posted: Wed Sep 01, 2010 10:22 am
by M_D_K
Code: Select all
struct Mouse
{
int dx, dy;
int oldX, oldY;
unsigned int buttons;
unsigned int oldButtons;
};
in your input code put this somewhere.
Code: Select all
SDL_PumpEvents();
mouse.oldButtons = mouse.buttons;
mouse.oldX = mouse.dx;
mouse.oldY = mouse.dy;
mouse.buttons = SDL_GetMouseState(&mouse.dx, &mouse.dy);
you can check for buttons by doing:
Code: Select all
bool mouseDown(int button)
{
return currMouse(button) && (!oldMouse(button));
}
bool mouseStillDown(int button)
{
return currMouse(button) && (oldMouse(button));
}
Same for checking if a button is up but in reverse.
where currMouse and oldMouse are defines:
Code: Select all
#define currMouse(x) ((mouse.buttons&SDL_BUTTON(x)) != 0)
#define oldMouse(x) ((mouse.oldButtons&SDL_BUTTON(x)) != 0)
Re: SDL Mouse States
Posted: Wed Sep 01, 2010 5:06 pm
by RandomDever
OK I tried all of your solutions and they didn't fully work.
The only time the thang would update was when I triggered an event.
So I thought OK maybe I put the update function in the while loop that handles events.
I checked and it wasn't in there.
After toying around for 30 minutes I realized that the functions were reversed.
I had made the update() code handle events and the check() code handle the thangs update.
So in essence I had my events updated in the logic section and my logic updated in my events section.
Anyways thank for all of your solutions.