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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"
static void extract_movement(struct Gestures *gs, struct MTouch* mt)
{
const struct FingerState *prev[DIM_FINGER];
const struct FingerState *f = mt->state.finger;
int same_fingers, i;
if (mt->state.nfinger == 0)
return;
same_fingers = mt->state.nfinger == mt->prev_state.nfinger;
for (i = 0; i < mt->state.nfinger; i++) {
prev[i] = find_finger(&mt->prev_state, mt->state.finger[i].id);
same_fingers = same_fingers && prev[i];
}
if (!same_fingers)
return;
for (i = 0; i < mt->state.nfinger; i++) {
gs->dx += f[i].hw.position_x - prev[i]->hw.position_x;
gs->dy += f[i].hw.position_y - prev[i]->hw.position_y;
}
gs->dx /= mt->state.nfinger;
gs->dy /= mt->state.nfinger;
}
static void extract_buttons(struct Gestures *gs, struct MTouch* mt)
{
if (mt->state.button == BITMASK(MT_BUTTON_LEFT)) {
if (mt->state.nfinger == 2)
mt->state.button = BITMASK(MT_BUTTON_RIGHT);
if (mt->state.nfinger == 3)
mt->state.button = BITMASK(MT_BUTTON_MIDDLE);
}
gs->btmask = (mt->state.button ^ mt->prev_state.button) & BITONES(DIM_BUTTON);
gs->btdata = mt->state.button & BITONES(DIM_BUTTON);
}
static void extract_type(struct Gestures *gs, struct MTouch* mt)
{
if (gs->dx || gs->dy) {
if (mt->state.nfinger == 1)
SETBIT(gs->type, GS_MOVE);
if (mt->state.nfinger == 2)
SETBIT(gs->type, GS_VSCROLL);
if (mt->state.nfinger == 3)
SETBIT(gs->type, GS_HSCROLL);
}
}
/******************************************************/
void extract_gestures(struct Gestures *gs, struct MTouch* mt)
{
memset(gs, 0, sizeof(struct Gestures));
extract_movement(gs, mt);
extract_buttons(gs, mt);
extract_type(gs, mt);
mt->prev_state = mt->state;
}
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