1 /*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package com.sun.glass.ui;
26
27 import com.sun.glass.events.TouchEvent;
28
29 import java.util.HashMap;
30 import java.util.Map;
31
32 public class TouchInputSupport
33 {
34 private int touchCount = 0;
35
36 private boolean filterTouchCoordinates;
37 private static class TouchCoord {
38 private final int x, y, xAbs, yAbs;
39
40 private TouchCoord(int x, int y, int xAbs, int yAbs) {
41 this.x = x;
42 this.y = y;
43 this.xAbs = xAbs;
44 this.yAbs = yAbs;
45 }
46 }
47 private Map<Long, TouchCoord> touch;
48
49 private TouchCountListener listener;
50
51 private int curTouchCount;
52 private View curView;
53 private int curModifiers;
54 private boolean curIsDirect;
55
56 public static interface TouchCountListener {
57 void touchCountChanged(TouchInputSupport sender, View view,
58 int modifiers, boolean isDirect);
59 }
60
61 public TouchInputSupport(TouchCountListener listener,
62 boolean filterTouchCoordinates) {
63 Application.checkEventThread();
64 this.listener = listener;
65 this.filterTouchCoordinates = filterTouchCoordinates;
66 if (filterTouchCoordinates) {
67 touch = new HashMap<>();
68 }
69 }
70
71 public int getTouchCount() {
72 Application.checkEventThread();
73 return touchCount;
74 }
75
76 public void notifyBeginTouchEvent(View view, int modifiers, boolean isDirect,
77 int touchEventCount) {
78
79 if (curView != null && view != curView && touchCount != 0 && touch != null) {
80 if (!curView.isClosed()) {
81 // Release the currently pressed touch points
82 curView.notifyBeginTouchEvent(0, true, touchCount);
83 for (Map.Entry<Long, TouchCoord> e : touch.entrySet()) {
84 TouchCoord coord = e.getValue();
85 curView.notifyNextTouchEvent(TouchEvent.TOUCH_RELEASED, e.getKey(), coord.x, coord.y, coord.xAbs, coord.yAbs);
86 }
87 curView.notifyEndTouchEvent();
88 }
89 touch.clear();
90 touchCount = 0;
91 if (listener != null ) {
92 listener.touchCountChanged(this, curView, 0, true);
93 }
94 }
95
96 curTouchCount = touchCount;
97 curView = view;
98 curModifiers = modifiers;
99 curIsDirect = isDirect;
100 if (view != null) {
101 view.notifyBeginTouchEvent(modifiers, isDirect, touchEventCount);
102 }
103 }
104
105 public void notifyEndTouchEvent(View view) {
106 if (view == null) {
107 return;
108 }
109
110 view.notifyEndTouchEvent();
111
112 // RT-21288. Notify outer world when touch point count changes
113 if (curTouchCount != 0 && touchCount != 0 && curTouchCount != touchCount &&
114 listener != null) {
115 listener.touchCountChanged(this, curView, curModifiers, curIsDirect);
116 }
117 }
118
119 public void notifyNextTouchEvent(View view, int state, long id, int x, int y,
120 int xAbs, int yAbs)
121 {
122 switch (state) {
123 case TouchEvent.TOUCH_RELEASED:
124 touchCount--;
125 break;
126 case TouchEvent.TOUCH_PRESSED:
127 touchCount++;
128 break;
129 case TouchEvent.TOUCH_MOVED:
130 case TouchEvent.TOUCH_STILL:
131 break;
132 default:
133 System.err.println("Unknown touch state: " + state);
134 return;
135 }
136
137 if (filterTouchCoordinates) {
138 state = filterTouchInputState(state, id, x, y, xAbs, yAbs);
139 }
140
141 if (view != null) {
142 view.notifyNextTouchEvent(state, id, x, y, xAbs, yAbs);
143 }
144 }
145
146 private int filterTouchInputState(int state, long id, int x, int y, int xAbs, int yAbs) {
147 switch (state) {
148 case TouchEvent.TOUCH_RELEASED:
149 touch.remove(id);
150 break;
151 case TouchEvent.TOUCH_MOVED:
152 TouchCoord c = touch.get(id);
153 if (x == c.x && y == c.y) {
154 state = TouchEvent.TOUCH_STILL;
155 break;
156 }
157 // fall through;
158 case TouchEvent.TOUCH_PRESSED:
159 touch.put(id, new TouchCoord(x, y, xAbs, yAbs));
160 break;
161 case TouchEvent.TOUCH_STILL:
162 break;
163 default:
164 System.err.println("Unknown touch state: " + state);
165 break;
166 }
167 return state;
168 }
169 }