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/*****************************************************************************
*
* grail - Gesture Recognition And Instantiation Library
*
* Copyright (C) 2010 Canonical Ltd.
* Copyright (C) 2010 Henrik Rydberg <rydberg@bitmath.org>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
****************************************************************************/
#include "grail-recognizer.h"
#include <math.h>
#include <stdio.h>
static const int getype[DIM_TOUCH + 1] = {
0,
0,
GRAIL_TYPE_PINCH2,
GRAIL_TYPE_PINCH3,
GRAIL_TYPE_PINCH4,
GRAIL_TYPE_PINCH5,
};
static const int fm_mask = 0x04;
static void set_props(struct combo_model *s,
const struct move_model *m,
const struct touch_frame *frame)
{
float x1, y1, x2, y2, x, y;
int i;
s->prop[GRAIL_PROP_PINCH_DR] = m->fm[FM_R].action_delta;
s->prop[GRAIL_PROP_PINCH_VR] = m->fm[FM_R].velocity;
s->prop[GRAIL_PROP_PINCH_R] = m->fm[FM_R].value;
s->nprop = 3;
if (!frame->nactive)
return;
x = frame->active[0]->prop[TP_POS_X];
y = frame->active[0]->prop[TP_POS_Y];
x1 = x2 = x;
y1 = y2 = y;
for (i = 1; i < frame->nactive; i++) {
x = frame->active[i]->prop[TP_POS_X];
y = frame->active[i]->prop[TP_POS_Y];
if (x < x1)
x1 = x;
if (y < y1)
y1 = y;
if (x > x2)
x2 = x;
if (y > y2)
y2 = y;
}
s->prop[GRAIL_PROP_PINCH_X1] = x1;
s->prop[GRAIL_PROP_PINCH_Y1] = y1;
s->prop[GRAIL_PROP_PINCH_X2] = x2;
s->prop[GRAIL_PROP_PINCH_Y2] = y2;
s->nprop = 7;
}
int gru_pinch(struct grail *ge,
const struct touch_frame *frame)
{
struct gesture_recognizer *gru = ge->gru;
struct combo_model *state = &gru->pinch;
struct move_model *move = &gru->move;
int mask = state->active ? (move->active & fm_mask) : fm_mask;
if (!move->multi) {
if (state->active) {
gru_end(ge, state->gid, move,
state->prop, state->nprop);
state->active = 0;
}
return 0;
}
if (!(move->tickle & mask))
return 0;
if (!state->active) {
int type = getype[move->ntouch];
if (!type)
return 0;
state->gid = gin_gid_begin(ge, type, PRIO_GESTURE, frame);
state->active = 1;
}
if (!(move->active & fm_mask))
return 0;
set_props(state, move, frame);
gru_event(ge, state->gid, move, state->prop, state->nprop);
return 1;
}
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