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SDL_x11mouse.c
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SDL_x11mouse.c
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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();
}
/* vi: set ts=4 sw=4 expandtab: */