Root/src/touchscreen.cpp

1/***************************************************************************
2 * Copyright (C) 2006 by Massimiliano Torromeo *
3 * massimiliano.torromeo@gmail.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
20
21#include <unistd.h>
22#include <iostream>
23
24#include "touchscreen.h"
25
26using namespace std;
27
28Touchscreen::Touchscreen() {
29    wm97xx = 0;
30    calibrated = false;
31    wasPressed = false;
32    _handled = false;
33    x = 0;
34    y = 0;
35    startX = 0;
36    startY = 0;
37    event.x = 0;
38    event.y = 0;
39    event.pressure = 0;
40}
41
42Touchscreen::~Touchscreen() {
43    if (wm97xx) deinit();
44}
45
46bool Touchscreen::init() {
47#ifdef TARGET_GP2X
48    wm97xx = open("/dev/touchscreen/wm97xx", O_RDONLY|O_NOCTTY);
49#endif
50    return initialized();
51}
52
53bool Touchscreen::initialized() {
54#ifdef TARGET_GP2X
55    return wm97xx>0;
56#else
57    return true;
58#endif
59}
60
61void Touchscreen::deinit() {
62#ifdef TARGET_GP2X
63    close(wm97xx);
64    wm97xx = 0;
65#endif
66}
67
68void Touchscreen::calibrate() {
69    if (event.pressure==0) {
70        calibX = ((event.x-200)*320/3750)/4;
71        calibY = (((event.y-200)*240/3750))/4;
72        calibrated = true;
73    }
74}
75
76bool Touchscreen::poll() {
77    wasPressed = pressed();
78#ifdef TARGET_GP2X
79    read(wm97xx, &event, sizeof(TS_EVENT));
80    if (!calibrated) calibrate();
81
82    if (event.pressure>0) {
83        x = ((event.x-200)*320/3750)-calibX;
84        y = (240 - ((event.y-200)*240/3750))-calibY;
85    }
86#else
87    SDL_PumpEvents();
88    int mx, my;
89    if (SDL_GetMouseState(&mx,&my) && SDL_BUTTON(1)) {
90        x = mx;
91        y = my;
92        event.pressure = 1;
93    } else {
94        event.pressure = 0;
95    }
96#endif
97    _handled = false;
98
99    if (!wasPressed && pressed()) {
100        startX = x;
101        startY = y;
102    }
103
104    return pressed();
105}
106
107bool Touchscreen::handled() {
108    return _handled;
109}
110
111void Touchscreen::setHandled() {
112    wasPressed = false;
113    _handled = true;
114}
115
116bool Touchscreen::pressed() {
117    return !_handled && event.pressure>0;
118}
119
120bool Touchscreen::released() {
121    return !pressed() && wasPressed;
122}
123
124bool Touchscreen::inRect(SDL_Rect r) {
125    return !_handled && (y>=r.y) && (y<=r.y+r.h) && (x>=r.x) && (x<=r.x+r.w);
126}
127
128bool Touchscreen::inRect(int x, int y, int w, int h) {
129    SDL_Rect rect = {x,y,w,h};
130    return inRect(rect);
131}
132
133bool Touchscreen::startedInRect(SDL_Rect r) {
134    return !_handled && (startY>=r.y) && (startY<=r.y+r.h) && (startX>=r.x) && (startX<=r.x+r.w);
135}
136
137bool Touchscreen::startedInRect(int x, int y, int w, int h) {
138    SDL_Rect rect = {x,y,w,h};
139    return startedInRect(rect);
140}
141

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