rubysdl_mouse.c

/*
  Ruby/SDL   Ruby extension library for SDL

  Copyright (C) 2001-2007 Ohbayashi Ippei
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
#include "rubysdl.h"

static SDL_Cursor *cursor=NULL;

static VALUE Mouse_s_state(VALUE mod)
{
  int x,y;
  Uint8 result;
  result = SDL_GetMouseState(&x, &y);
  return rb_ary_new3(5,INT2FIX(x), INT2FIX(y),
                     INT2BOOL(result&SDL_BUTTON_LMASK),
		     INT2BOOL(result&SDL_BUTTON_MMASK),
		     INT2BOOL(result&SDL_BUTTON_RMASK));
}

static VALUE Mouse_s_warp(VALUE mod, VALUE x, VALUE y)
{
  SDL_WarpMouse(NUM2UINT(x), NUM2UINT(y));
  return Qnil;
}

static VALUE Mouse_s_setCursor_imp(VALUE mod,VALUE data,VALUE mask,VALUE w,
                                   VALUE h,VALUE hot_x,VALUE hot_y)
{
  SDL_Cursor *new_cursor;

  SafeStringValue(data);
  SafeStringValue(mask);

  if(RSTRING_LEN(data) != NUM2INT(w)*NUM2INT(h)/8) {
    rb_raise(rb_eArgError, "the size of data string is incorrect");
  }
  if(RSTRING_LEN(mask) != NUM2INT(w)*NUM2INT(h)/8) {
    rb_raise(rb_eArgError, "the size of mask string is incorrect");
  }
  
  new_cursor = SDL_CreateCursor((Uint8 *)RSTRING_PTR(data),
                                (Uint8 *)RSTRING_PTR(mask),
                                NUM2INT(w), NUM2INT(h),
                                NUM2INT(hot_x),NUM2INT(hot_y));
  if(new_cursor == NULL)
    rb_raise(eSDLError, "cursor creation failed :%s", SDL_GetError());
  
  SDL_SetCursor(new_cursor);
  
  /* free old cursor */
  if(cursor)
    SDL_FreeCursor(cursor);
  
  cursor = new_cursor;
  
  return Qnil;
}
  
static VALUE Mouse_s_show(VALUE mod)
{
  SDL_ShowCursor(1);
  return Qnil;
}
static VALUE Mouse_s_hide(VALUE mod)
{
  SDL_ShowCursor(0);
  return Qnil;
}
static VALUE Mouse_s_show_p(VALUE mod)
{
  return INT2BOOL(SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE);
}

void rubysdl_init_Mouse(VALUE mSDL)
{
  VALUE mMouse = rb_define_module_under(mSDL, "Mouse");
  
  rb_define_module_function(mMouse, "state", Mouse_s_state, 0);
  rb_define_module_function(mMouse, "warp", Mouse_s_warp, 2);
  rb_define_module_function(mMouse, "setCursor_imp", Mouse_s_setCursor_imp, 6);
  rb_define_module_function(mMouse, "show", Mouse_s_show, 0);
  rb_define_module_function(mMouse, "show?", Mouse_s_show_p, 0);
  rb_define_module_function(mMouse, "hide", Mouse_s_hide, 0);

  rb_define_const(mMouse,"BUTTON_LEFT",INT2NUM(SDL_BUTTON_LEFT));
  rb_define_const(mMouse,"BUTTON_MIDDLE",INT2NUM(SDL_BUTTON_MIDDLE));
  rb_define_const(mMouse,"BUTTON_RIGHT",INT2NUM(SDL_BUTTON_RIGHT));
  rb_define_const(mMouse,"BUTTON_LMASK",UINT2NUM(SDL_BUTTON_LMASK));
  rb_define_const(mMouse,"BUTTON_MMASK",UINT2NUM(SDL_BUTTON_MMASK));
  rb_define_const(mMouse,"BUTTON_RMASK",UINT2NUM(SDL_BUTTON_RMASK));
}