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/***************************************************************************
*
* Multitouch X driver
* Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#include "gestures.h"
/******************************************************/
void extract_gestures(struct Gestures *gs, struct MTouch* mt)
{
const struct FingerState *b = mt->ns.finger;
const struct FingerState *e = b + mt->ns.nfinger;
const struct FingerState *p, *fs;
int nof = count_fingers(&mt->os);
int nsf = count_fingers(&mt->ns);
int dn = 0, i;
memset(gs, 0, sizeof(struct Gestures));
if (nof == nsf) {
for (p = b; p != e; p++) {
if (fs = find_finger(&mt->os, p->id)) {
gs->dx += p->hw.position_x - fs->hw.position_x;
gs->dy += p->hw.position_y - fs->hw.position_y;
dn++;
}
}
}
if (gs->dx || gs->dy) {
gs->dx /= dn;
gs->dy /= dn;
if (nsf == 1)
SETBIT(gs->type, GS_MOVE);
if (nsf == 2)
SETBIT(gs->type, GS_VSCROLL);
if (nsf == 3)
SETBIT(gs->type, GS_HSCROLL);
}
if (mt->ns.button == BITMASK(MT_BUTTON_LEFT)) {
if (nsf == 2)
mt->ns.button = BITMASK(MT_BUTTON_RIGHT);
if (nsf == 3)
mt->ns.button = BITMASK(MT_BUTTON_MIDDLE);
}
gs->btmask = (mt->ns.button ^ mt->os.button) & BITONES(DIM_BUTTON);
gs->btdata = mt->ns.button & BITONES(DIM_BUTTON);
mt->os = mt->ns;
}
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