tansive/src/event.c

/*
	Copyright (C) 2011 Weber Yann, Schuck Clement

	This file is part of Tansive.

	Tansive is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	Tansive is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with Tansive.  If not, see <http://www.gnu.org/licenses/>.
*/
#include"event.h"

/*
	Thread function for SDL events handling
*/
void* event_catcher_loop(void* arg)
{
	t_param_thread_event *param = (t_param_thread_event*)arg;
	*(param->again) = 1;
	SDL_Event event;
	
	while(*(param->again))
	{	
		bzero(&event,sizeof(SDL_Event));
		SDL_PollEvent(&event);
		
		switch(event.type)
		{
			case SDL_QUIT:
				pthread_mutex_lock(param->mutex);
				*(param->again) = 0;
				pthread_mutex_unlock(param->mutex);
				break;
			case SDL_MOUSEMOTION:
				pthread_mutex_lock(param->mutex);
				*(param->mx) = event.motion.x;
				*(param->my) = event.motion.y;
				pthread_mutex_unlock(param->mutex);
				break;
			case SDL_MOUSEBUTTONUP:
				pthread_mutex_lock(param->mutex);
				
				if (event.button.button == SDL_BUTTON_RIGHT || event.button.button == SDL_BUTTON_WHEELDOWN)
				{
					if(*(param->zoom) < 3)
					{
						*(param->x) = *(param->x_resol)/2;
						*(param->y) = *(param->y_resol)/2;
					}
					else
					{
						*(param->x) -= (*(param->x_resol)/ *(param->zoom))/2;
						*(param->y) -= (*(param->y_resol)/ *(param->zoom))/2;
						*(param->x) +=  event.button.x/ *(param->zoom);
						*(param->y) += event.button.y/ *(param->zoom);
					}
					
					*(param->zoom) = (*(param->zoom)>1?*(param->zoom)-1:1);
				}
				else if (event.button.button == SDL_BUTTON_LEFT || event.button.button == SDL_BUTTON_WHEELUP)
				{
					*(param->x) -= (*(param->x_resol)/ *(param->zoom))/2;
					*(param->y) -= (*(param->y_resol)/ *(param->zoom))/2;
					*(param->x) +=  event.button.x/ *(param->zoom);
					*(param->y) += event.button.y/ *(param->zoom);
					*(param->zoom)+=1;
				}
				
				pthread_mutex_unlock(param->mutex);
				break;
			case SDL_KEYDOWN:
				pthread_mutex_lock(param->mutex);
				switch(event.key.keysym.sym)
				{
					case SDLK_ESCAPE:
						*(param->again) = 0;
						break;
					case SDLK_UP:
						*(param->y)-=1;
						*(param->y) = *(param->y)<0?0:*(param->y);
						break;
					case SDLK_DOWN:
						*(param->y)+=1;
						*(param->y) = *(param->y)>*(param->y_resol)-1?*(param->y_resol)-1:*(param->y);
						break;
					case SDLK_RIGHT:
						*(param->x)+=1;
						*(param->x) = *(param->x)>*(param->x_resol)-1?*(param->x_resol)-1:*(param->x);
						break;
					case SDLK_LEFT:
						*(param->x)-=1;
						*(param->x) = *(param->x)<0?0:*(param->x);
						break;
				}
				pthread_mutex_unlock(param->mutex);
			break;

		}
	
	}
	
	exit(0);
}