event.c

来自「适合KS8695X」· C语言 代码 · 共 602 行 · 第 1/2 页

    while (EVT.count < EVENTQSIZE) {
	rc = mouse_read(_PM_mouse_ctl, &ev, 1, 0, NULL);
	if (rc == -1) {
	    perror("getEvents");
	    PM_fatalError("Mouse error (Input terminated?)");
	    }
	if (rc == 0)
	    break;

	message = 0, but_stat = 0;
	memset(&evt, 0, sizeof(evt));

	ev.buttons &= (_MOUSE_LEFT | _MOUSE_RIGHT);
	if (ev.buttons & _MOUSE_LEFT)
	    but_stat = EVT_LEFTBUT;
	if ((ev.buttons & _MOUSE_LEFT) != (old_buttons & _MOUSE_LEFT))
	    message = EVT_LEFTBMASK;
	if (ev.buttons & _MOUSE_RIGHT)
	    but_stat |= EVT_RIGHTBUT;
	if ((ev.buttons & _MOUSE_RIGHT) != (old_buttons & _MOUSE_RIGHT))
	    message |= EVT_RIGHTBMASK;
	if (ev.dx || ev.dy) {
	    ev.dy = -ev.dy;
	    EVT.mx += MickeyToPixel(ev.dx);
	    EVT.my += MickeyToPixel(ev.dy);
	    if (EVT.mx < 0) EVT.mx = 0;
	    if (EVT.my < 0) EVT.my = 0;
	    if (EVT.mx > rangeX)    EVT.mx = rangeX;
	    if (EVT.my > rangeY)    EVT.my = rangeY;
	    evt.what = EVT_MOUSEMOVE;
	    evt.when = ev.timestamp*100;
	    evt.where_x = EVT.mx;
	    evt.where_y = EVT.my;
	    evt.relative_x = ev.dx;
	    evt.relative_y = ev.dy;
	    evt.modifiers = but_stat;
	    addEvent(&evt);
	    }
	evt.what = ev.buttons < old_buttons ? EVT_MOUSEUP : EVT_MOUSEDOWN;
	evt.when = ev.timestamp*100;
	evt.where_x = EVT.mx;
	evt.where_y = EVT.my;
	evt.relative_x = ev.dx;
	evt.relative_y = ev.dy;
	evt.modifiers = but_stat;
	evt.message = message;
	if (ev.buttons != old_buttons) {
	    addEvent(&evt);
	    old_buttons = ev.buttons;
	    }
	}
}
#endif  /* __QNXNTO__ */

/****************************************************************************
REMARKS:
This macro/function is used to converts the scan codes reported by the
keyboard to our event libraries normalised format. We only have one scan
code for the 'A' key, and use shift modifiers to determine if it is a
Ctrl-F1, Alt-F1 etc. The raw scan codes from the keyboard work this way,
but the OS gives us 'cooked' scan codes, we have to translate them back
to the raw format.
****************************************************************************/
#define _EVT_maskKeyCode(evt)

/****************************************************************************
REMARKS:
Safely abort the event module upon catching a fatal error.
****************************************************************************/
void _EVT_abort(
    int signo)
{
    char    buf[80];

    EVT_exit();
    sprintf(buf,"Terminating on signal %d",signo);
    PM_fatalError(buf);
}

/****************************************************************************
PARAMETERS:
mouseMove   - Callback function to call wheneve the mouse needs to be moved

REMARKS:
Initiliase the event handling module. Here we install our mouse handling ISR
to be called whenever any button's are pressed or released. We also build
the free list of events in the event queue.

We use handler number 2 of the mouse libraries interrupt handlers for our
event handling routines.
****************************************************************************/
void EVTAPI EVT_init(
    _EVT_mouseMoveHandler mouseMove)
{
    int         i;
    struct stat st;
    char        *iarg[16];
#ifdef __QNXNTO__
    char        buf[128];
    FILE        *p;
    int         argno,len;
#endif

#ifdef __QNXNTO__
    ThreadCtl(_NTO_TCTL_IO, 0); /* So joystick code won't blow up */
#endif

    /* Initialise the event queue */
    EVT.mouseMove = mouseMove;
    initEventQueue();
    memset(keyUpMsg,0,sizeof(keyUpMsg));

#ifdef __QNXNTO__
    /*
     * User may already have input running with the right parameters.
     * Thus they could start input at boot time, using the output of
     * inputtrap, passing the the -r flag to make it run as a resource
     * manager.
     */
    if ((mouse_fd = open("/dev/mouse0", O_RDONLY | O_NONBLOCK)) < 0) {
	/* Run inputtrap to get the args for input */
	if ((p = popen("inputtrap", "r")) == NULL)
	    PM_fatalError("Error running 'inputtrap'");
	fgets(buf, sizeof(buf), p);
	pclose(p);

	/* Build the argument list */
	len = strlen(buf);
	iarg[0] = buf;
	for (i = 0, argno = 0; i < len && argno < 15;) {
	    if (argno == 1) {
		/*
		 * Add flags to input's arg list.
		 * '-r' means run as resource
		 * manager, providing the /dev/mouse
		 * and /dev/keyboard interfaces.
		 * '-P' supresses the /dev/photon
		 * mechanism.
		 */
		iarg[argno++] = "-Pr";
		continue;
		}
	    while (buf[i] == ' ')
		i++;
	    if (buf[i] == '\0' || buf[i] == '\n')
		break;
	    iarg[argno++] = &buf[i];
	    while (buf[i] != ' '
		&& buf[i] != '\0' && buf[i] != '\n')
		i++;
	    buf[i++] = '\0';
	    }
	iarg[argno] = NULL;

	if ((kill_pid = spawnvp(P_NOWAITO, iarg[0], iarg)) == -1) {
	    perror("spawning input resmgr");
	    PM_fatalError("Could not start input resmgr");
	    }
	for (i = 0; i < 10; i++) {
	    if (stat("/dev/mouse0", &st) == 0)
		break;
	    sleep(1);
	    }
	if ((mouse_fd = open("/dev/mouse0", O_RDONLY|O_NONBLOCK)) < 0) {
	    perror("/dev/mouse0");
	    PM_fatalError("Could not open /dev/mouse0");
	    }
	}
    if ((kbd_fd = open("/dev/keyboard0", O_RDONLY|O_NONBLOCK)) < 0) {
	perror("/dev/keyboard0");
	PM_fatalError("Could not open /dev/keyboard0");
	}
#else
    /* Connect to Input/Mouse for event handling */
    if (_PM_mouse_ctl == NULL) {
	_PM_mouse_ctl = mouse_open(0, "/dev/mouse", 0);

	/* "Mouse" is not running; attempt to start it */
	if (_PM_mouse_ctl == NULL) {
	    iarg[0] = "mousetrap";
	    iarg[1] = "start";
	    iarg[2] = NULL;
	    if ((kill_pid = spawnvp(P_NOWAITO, iarg[0], (void*)iarg)) == -1)
		perror("spawn (mousetrap)");
	    else {
		for (i = 0; i < 10; i++) {
		    if (stat("/dev/mouse", &st) == 0)
			break;
		    sleep(1);
		    }
		_PM_mouse_ctl = mouse_open(0, "/dev/mouse", 0);
		}
	    }
	}
    if (_PM_keyboard_fd == -1)
	_PM_keyboard_fd = open("/dev/kbd", O_RDONLY|O_NONBLOCK);
#endif

    /* Catch program termination signals so we can clean up properly */
    signal(SIGABRT, _EVT_abort);
    signal(SIGFPE, _EVT_abort);
    signal(SIGINT, _EVT_abort);
}

/****************************************************************************
REMARKS
Changes the range of coordinates returned by the mouse functions to the
specified range of values. This is used when changing between graphics
modes set the range of mouse coordinates for the new display mode.
****************************************************************************/
void EVTAPI EVT_setMouseRange(
    int xRes,
    int yRes)
{
    rangeX = xRes;
    rangeY = yRes;
}

/****************************************************************************
REMARKS
Modifes the mouse coordinates as necessary if scaling to OS coordinates,
and sets the OS mouse cursor position.
****************************************************************************/
#define _EVT_setMousePos(x,y)

/****************************************************************************
REMARKS:
Initiailises the internal event handling modules. The EVT_suspend function
can be called to suspend event handling (such as when shelling out to DOS),
and this function can be used to resume it again later.
****************************************************************************/
void EVT_resume(void)
{
    /* Do nothing for QNX */
}

/****************************************************************************
REMARKS
Suspends all of our event handling operations. This is also used to
de-install the event handling code.
****************************************************************************/
void EVT_suspend(void)
{
    /* Do nothing for QNX */
}

/****************************************************************************
REMARKS
Exits the event module for program terminatation.
****************************************************************************/
void EVT_exit(void)
{
#ifdef __QNXNTO__
    char    c;
    int flags;

    if (kbd_fd != -1) {
	close(kbd_fd);
	kbd_fd = -1;
	}
    if (mouse_fd != -1) {
	close(mouse_fd);
	mouse_fd = -1;
	}
#endif

    /* Restore signal handlers */
    signal(SIGABRT, SIG_DFL);
    signal(SIGFPE, SIG_DFL);
    signal(SIGINT, SIG_DFL);

#ifndef __QNXNTO__
    /* Kill the Input/Mouse driver if we have spawned it */
    if (_PM_mouse_ctl != NULL) {
	struct _fd_entry    fde;
	uint            pid = 0;

	/* Find out the pid of the mouse driver */
	if (kill_pid > 0) {
	    if (qnx_fd_query(0,
		0, _PM_mouse_ctl->fd, &fde) != -1)
		pid = fde.pid;
	    }
	mouse_close(_PM_mouse_ctl);
	_PM_mouse_ctl = NULL;

	if (pid > 0) {
	    /* For some reasons the PID's are different under QNX4,
	     * so we use the old mechanism to kill the mouse server.
	     */
	    kill(pid, SIGTERM);
	    kill_pid = 0;
	    }
	}
#endif
    if (kill_pid > 0) {
	kill(kill_pid, SIGTERM);
	kill_pid = 0;
	}
}