view src/video/x11/SDL_x11mouse.c @ 2763:6fc50bdd88c0

Some cleanups on the new XInput code. One or two things got moved around, but largely this is hooked up correctly in the Unix configure system now: it can be dynamically loaded and fallback gracefully if not available, or libXi can be directly linked to libSDL. XInput support can be --disable'd from the configure script, too (defaults to enabled). Please note that while the framework is in place to gracefully fallback, the current state of the source requires XInput. We'll need to adjust a few things still to correct this.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 17 Sep 2008 08:20:57 +0000
parents 44e49d3fa6cf
children f55c87ae336b
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_x11video.h"
#include "../../events/SDL_mouse_c.h"

void
X11_InitMouse(_THIS)
{
#if SDL_VIDEO_DRIVER_X11_XINPUT
    XDevice **newDevices;
    int i, j, index = 0, numOfDevices;
    XDeviceInfo *DevList;
    XAnyClassPtr deviceClass;
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

    SDL_XDevices = NULL;
    SDL_NumOfXDevices = 0;

    if (!SDL_X11_HAVE_XINPUT)
        return;  /* should have dynamically loaded, but wasn't available. */

    /* we're getting the list of input devices */
    DevList = XListInputDevices(data->display, &numOfDevices);
    SDL_XDevices = (XDevice **) SDL_malloc(sizeof(XDevice));

    /* we're aquiring valuators:mices, tablets, etc. */
    for (i = 0; i < numOfDevices; ++i) {
        /* if it's the core pointer or core keyborard we don't want it */
        if ((DevList[i].use != IsXPointer && DevList[i].use != IsXKeyboard)) {
            /* we have to check all of the device classes */
            deviceClass = DevList[i].inputclassinfo;
            for (j = 0; j < DevList[i].num_classes; ++j) {
                if (deviceClass->class == ValuatorClass) {      /* bingo ;) */
                    XValuatorInfo *valInfo;
                    SDL_Mouse mouse;

                    newDevices =
                        (XDevice **) SDL_realloc(SDL_XDevices,
                                                 (index +
                                                  1) * sizeof(*newDevices));
                    if (!newDevices) {
                        SDL_OutOfMemory();
                        return;
                    }
                    SDL_XDevices = newDevices;
                    SDL_XDevices[index] =
                        XOpenDevice(data->display, DevList[i].id);
                    SDL_zero(mouse);

                    /* the id of the device differs from its index
                     * so we're assigning the index of a device to it's id */
                    SDL_SetMouseIndexId(DevList[i].id, index);
                    /* lets get the device parameters */
                    valInfo = (XValuatorInfo *) deviceClass;
                    /* if the device reports pressure, lets check it parameteres */
                    if (valInfo->num_axes > 2) {
                        data->mouse =
                            SDL_AddMouse(&mouse, index++, DevList[i].name,
                                         valInfo->axes[2].max_value,
                                         valInfo->axes[2].min_value, 1);
                    } else {
                        data->mouse =
                            SDL_AddMouse(&mouse, index++, DevList[i].name, 0,
                                         0, 1);
                    }
                    break;
                }
                /* if it's not class we're interested in, lets go further */
                deviceClass =
                    (XAnyClassPtr) ((char *) deviceClass +
                                    deviceClass->length);
            }
        }
    }
    XFreeDeviceList(DevList);

    SDL_NumOfXDevices = index;
#endif
}

void
X11_QuitMouse(_THIS)
{
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;

    /* !!! FIXME: use XCloseDevice()? Or maybe handle under SDL_MouseQuit()? */

    /* let's delete all of the mice */
    SDL_MouseQuit();
}

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