Thread: Mouse activity

SDL_events.h has this struct for mouse actions >

Code:

typedef struct SDL_MouseButtonEvent {
	Uint8 type;	/* SDL_MOUSEBUTTONDOWN or SDL_MOUSEBUTTONUP */
	Uint8 which;	/* The mouse device index */
	Uint8 button;	/* The mouse button index */
	Uint8 state;	/* SDL_PRESSED or SDL_RELEASED */
	Uint16 x, y;	/* The X/Y coordinates of the mouse at press time */
} SDL_MouseButtonEvent;

I am trying to use the members x and y so i can return my pointing device co-ordinates,

By using another struct in the header i have got event polling working for simple button down/up events, eg 'click on the window to close' actions, but these events test conditions rather than store new values in a variable for me to pass on, and this is where i am stuck, i have tried >

Code:

  
int done = 0;
int startx = 0;

while(done == 0)
  {
    SDL_Event testEvent;
    SDL_MouseButtonEvent newXY; 
    
    while ( SDL_PollEvent(&testEvent) )
    {
      if ( testEvent.type == SDL_QUIT )  {  done = 1;  }

      if ( testEvent.type == SDL_KEYDOWN )
      {
        if ( testEvent.key.keysym.sym == SDLK_ESCAPE ) { done = 1; }
      }
      if ( testEvent.type == SDL_MOUSEBUTTONDOWN )
      {
          startx = newXY.x;  
          
      }
    }

   // Continue working here...
  }

a watch on startx shows a random value 20013, so this is wrong so far. Wrong i think because the member 'x' value is unassigned to start with so i need to get the mouse co-ordinates from somewhere else because this struct is not like a function that returns the value of 'x'... so how is it used in any useful way?