pygame / src / mouse.c

/*
  pygame - Python Game Library
  Copyright (C) 2000-2001  Pete Shinners

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 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
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public
  License along with this library; if not, write to the Free
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  Pete Shinners
  pete@shinners.org
*/

/*
 *  pygame mouse module
 */
#include "pygame.h"
#include "pgcompat.h"
#include "pygamedocs.h"

/* mouse module functions */
static PyObject*
mouse_set_pos (PyObject* self, PyObject* args)
{
    int x, y;

    if (!TwoIntsFromObj (args, &x, &y))
        return RAISE (PyExc_TypeError, "invalid position argument for set_pos");

    VIDEO_INIT_CHECK ();

    SDL_WarpMouse ((Uint16)x, (Uint16)y);
    Py_RETURN_NONE;
}

static PyObject*
mouse_get_pos (PyObject* self)
{
    int x, y;

    VIDEO_INIT_CHECK ();
    SDL_GetMouseState (&x, &y);
    return Py_BuildValue ("(ii)", x, y);
}


static PyObject*
mouse_get_rel (PyObject* self)
{
    int x, y;

    VIDEO_INIT_CHECK ();

    SDL_GetRelativeMouseState (&x, &y);
    return Py_BuildValue ("(ii)", x, y);
}

static PyObject*
mouse_get_pressed (PyObject* self)
{
    PyObject* tuple;
    int state;

    VIDEO_INIT_CHECK ();

    state = SDL_GetMouseState (NULL, NULL);
    if (!(tuple = PyTuple_New (3)))
        return NULL;

    PyTuple_SET_ITEM (tuple, 0, PyInt_FromLong ((state & SDL_BUTTON (1)) != 0));
    PyTuple_SET_ITEM (tuple, 1, PyInt_FromLong ((state & SDL_BUTTON (2)) != 0));
    PyTuple_SET_ITEM (tuple, 2, PyInt_FromLong ((state & SDL_BUTTON (3)) != 0));

    return tuple;
}

static PyObject*
mouse_set_visible (PyObject* self, PyObject* args)
{
    int toggle;

    if (!PyArg_ParseTuple (args, "i", &toggle))
        return NULL;
    VIDEO_INIT_CHECK ();

    toggle = SDL_ShowCursor (toggle);
    return PyInt_FromLong (toggle);
}

static PyObject*
mouse_get_focused (PyObject* self)
{
    VIDEO_INIT_CHECK ();
    return PyInt_FromLong ((SDL_GetAppState () & SDL_APPMOUSEFOCUS) != 0);
}

static PyObject*
mouse_set_cursor (PyObject* self, PyObject* args)
{
    int w, h, spotx, spoty;
    PyObject *xormask, *andmask;
    Uint8 *xordata=NULL, *anddata=NULL;
    int xorsize, andsize, loop;
    int val;
    SDL_Cursor *lastcursor, *cursor = NULL;

    if (!PyArg_ParseTuple (args, "(ii)(ii)OO", &w, &h, &spotx, &spoty,
                           &xormask, &andmask))
        return NULL;

    VIDEO_INIT_CHECK ();

    if (!PySequence_Check (xormask) || !PySequence_Check (andmask))
        return RAISE (PyExc_TypeError, "xormask and andmask must be sequences");

    if (w % 8)
        return RAISE (PyExc_ValueError, "Cursor width must be divisible by 8.");

    xorsize = PySequence_Length (xormask);
    andsize = PySequence_Length (andmask);

    if (xorsize != w * h / 8 || andsize != w * h / 8)
        return RAISE (PyExc_ValueError,
                      "bitmasks must be sized width*height/8");

    xordata = (Uint8*) malloc (xorsize);
    anddata = (Uint8*) malloc (andsize);

    for (loop = 0; loop < xorsize; ++loop)
    {
        if (!IntFromObjIndex (xormask, loop, &val))
            goto interror;
        xordata[loop] = (Uint8)val;
        if (!IntFromObjIndex (andmask, loop, &val))
            goto interror;
        anddata[loop] = (Uint8)val;
    }

    cursor = SDL_CreateCursor (xordata, anddata, w, h, spotx, spoty);
    free (xordata);
    free (anddata);
    xordata = NULL;
    anddata = NULL;

    if (!cursor)
        return RAISE (PyExc_SDLError, SDL_GetError ());

    lastcursor = SDL_GetCursor ();
    SDL_SetCursor (cursor);
    SDL_FreeCursor (lastcursor);

    Py_RETURN_NONE;

interror:
    if (xordata)
        free (xordata);
    if (anddata)
        free (anddata);
    return RAISE (PyExc_TypeError, "Invalid number in mask array");
}

static PyObject*
mouse_get_cursor (PyObject* self)
{
    SDL_Cursor *cursor = NULL;
    PyObject* xordata, *anddata;
    int size, loop, w, h, spotx, spoty;

    VIDEO_INIT_CHECK ();

    cursor = SDL_GetCursor ();
    if (!cursor)
        return RAISE (PyExc_SDLError, SDL_GetError ());

    w = cursor->area.w;
    h = cursor->area.h;
    spotx = cursor->hot_x;
    spoty = cursor->hot_y;

    size = cursor->area.w * cursor->area.h / 8;
    xordata = PyTuple_New(size);
    if (!xordata)
        return NULL;
    anddata = PyTuple_New (size);
    if (!anddata)
    {
        Py_DECREF (anddata);
        return NULL;
    }

    for (loop = 0; loop < size; ++loop)
    {
        PyTuple_SET_ITEM (xordata, loop, PyInt_FromLong (cursor->data[loop]));
        PyTuple_SET_ITEM (anddata, loop, PyInt_FromLong (cursor->mask[loop]));
    }

    return Py_BuildValue ("((ii)(ii)NN)", w, h, spotx, spoty, xordata, anddata);
}

static PyMethodDef _mouse_methods[] =
{
    { "set_pos", mouse_set_pos, METH_VARARGS, DOC_PYGAMEMOUSESETPOS },
    { "get_pos", (PyCFunction) mouse_get_pos, METH_VARARGS,
      DOC_PYGAMEMOUSEGETPOS },
    { "get_rel", (PyCFunction) mouse_get_rel, METH_VARARGS,
      DOC_PYGAMEMOUSEGETREL },
    { "get_pressed", (PyCFunction) mouse_get_pressed, METH_VARARGS,
      DOC_PYGAMEMOUSEGETPRESSED },
    { "set_visible", mouse_set_visible, METH_VARARGS,
      DOC_PYGAMEMOUSESETVISIBLE },
    { "get_focused", (PyCFunction) mouse_get_focused, METH_VARARGS,
      DOC_PYGAMEMOUSEGETFOCUSED },
    { "set_cursor", mouse_set_cursor, METH_VARARGS, DOC_PYGAMEMOUSESETCURSOR },
    { "get_cursor", (PyCFunction) mouse_get_cursor, METH_VARARGS,
      DOC_PYGAMEMOUSEGETCURSOR },

    { NULL, NULL, 0, NULL }
};


MODINIT_DEFINE (mouse)
{
    PyObject *module;

#if PY3
    static struct PyModuleDef _module = {
        PyModuleDef_HEAD_INIT,
        "mouse",
        DOC_PYGAMEMOUSE,
        -1,
        _mouse_methods,
        NULL, NULL, NULL, NULL
    };
#endif

    /* imported needed apis; Do this first so if there is an error
       the module is not loaded.
    */
    import_pygame_base ();
    if (PyErr_Occurred ()) {
        MODINIT_ERROR;
    }

    /* create the module */
#if PY3
    module = PyModule_Create (&_module);
#else
    module = Py_InitModule3 ("mouse", _mouse_methods, DOC_PYGAMEMOUSE);
#endif
    if (module == NULL) {
        MODINIT_ERROR;
    }
    MODINIT_RETURN (module);
}
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