1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/***************************************************************************
*
* Multitouch X driver
* Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
*
* Gestures
* Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
* Copyright (C) 2010 Arturo Castro <mail@arturocastro.net>
*
* 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"
/* timer for cursor stability on finger touch/release */
static const int AFTER_FINGER_CHANGE_MS = 70;
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, x = 0, y = 0;
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];
}
for (i = 0; i < mt->state.nfinger; i++) {
x += f[i].hw.position_x;
y += f[i].hw.position_y;
}
x /= mt->state.nfinger;
y /= mt->state.nfinger;
if (!same_fingers) {
mt->mem.move_time = mt->state.evtime + AFTER_FINGER_CHANGE_MS;
} else if (mt->state.evtime >= mt->mem.move_time) {
gs->dx = x - mt->mem.move_x;
gs->dy = y - mt->mem.move_y;
} else {
/* accumulate all movement during delay */
return;
}
mt->mem.move_x = x;
mt->mem.move_y = y;
}
static void extract_buttons(struct Gestures *gs, struct MTouch* mt)
{
unsigned btdata = mt->state.button & BITONES(DIM_BUTTON);
if (mt->state.button == BITMASK(MT_BUTTON_LEFT)) {
if (mt->state.nfinger == 2)
btdata = BITMASK(MT_BUTTON_RIGHT);
if (mt->state.nfinger == 3)
btdata = BITMASK(MT_BUTTON_MIDDLE);
}
gs->btmask = (btdata ^ mt->mem.btdata) & BITONES(DIM_BUTTON);
gs->btdata = btdata;
mt->mem.btdata = btdata;
}
/******************************************************/
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;
}
|
