1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package com.android.tools.sdkcontroller.handlers; 18 19 import android.content.Context; 20 import android.graphics.Point; 21 import android.os.Message; 22 import android.util.Log; 23 24 import com.android.tools.sdkcontroller.lib.EmulatorConnection; 25 26 27 public class MultiTouchHandler extends BaseHandler { 28 29 @SuppressWarnings("hiding") 30 private static final String TAG = MultiTouchHandler.class.getSimpleName(); 31 /** 32 * A new frame buffer has been received from the emulator. 33 * Parameter {@code obj} is a {@code byte[] array} containing the screen data. 34 */ 35 public static final int EVENT_FRAME_BUFFER = 1; 36 /** 37 * A multi-touch "start" command has been received from the emulator. 38 * Parameter {@code obj} is the string parameter from the start command. 39 */ 40 public static final int EVENT_MT_START = 2; 41 /** 42 * A multi-touch "stop" command has been received from the emulator. 43 * There is no {@code obj} parameter associated. 44 */ 45 public static final int EVENT_MT_STOP = 3; 46 47 private static final Point mViewSize = new Point(0, 0); 48 MultiTouchHandler()49 public MultiTouchHandler() { 50 super(HandlerType.MultiTouch, EmulatorConnection.MULTITOUCH_PORT); 51 } 52 setViewSize(int width, int height)53 public void setViewSize(int width, int height) { 54 mViewSize.set(width, height); 55 } 56 57 @Override onStart(EmulatorConnection connection, Context context)58 public void onStart(EmulatorConnection connection, Context context) { 59 super.onStart(connection, context); 60 } 61 62 @Override onStop()63 public void onStop() { 64 super.onStop(); 65 } 66 67 /** 68 * Called when a query is received from the emulator. NOTE: This method is 69 * called from the I/O loop. 70 * 71 * @param query Name of the query received from the emulator. The allowed 72 * queries are: - 'start' - Starts delivering touch screen events 73 * to the emulator. - 'stop' - Stops delivering touch screen 74 * events to the emulator. 75 * @param param Query parameters. 76 * @return Zero-terminated reply string. String must be formatted as such: 77 * "ok|ko[:reply data]" 78 */ 79 @Override onEmulatorQuery(String query, String param)80 public String onEmulatorQuery(String query, String param) { 81 if (query.contentEquals("start")) { 82 Message msg = Message.obtain(); 83 msg.what = EVENT_MT_START; 84 msg.obj = param; 85 notifyUiHandlers(msg); 86 return "ok:" + mViewSize.x + "x" + mViewSize.y + "\0"; 87 88 } else if (query.contentEquals("stop")) { 89 notifyUiHandlers(EVENT_MT_STOP); 90 return "ok\0"; 91 92 } else { 93 Log.e(TAG, "Unknown query " + query + "(" + param + ")"); 94 return "ko:Unknown query\0"; 95 } 96 } 97 98 /** 99 * Called when a BLOB query is received from the emulator. 100 * <p/> 101 * This query is used to deliver framebuffer updates in the emulator. The 102 * blob contains an update header, followed by the bitmap containing updated 103 * rectangle. The header is defined as MTFrameHeader structure in 104 * external/qemu/android/multitouch-port.h 105 * <p/> 106 * NOTE: This method is called from the I/O loop, so all communication with 107 * the emulator will be "on hold" until this method returns. 108 * 109 * @param array contains BLOB data for the query. 110 * @return Empty string: this query doesn't require any response. 111 */ 112 @Override onEmulatorBlobQuery(byte[] array)113 public String onEmulatorBlobQuery(byte[] array) { 114 Message msg = Message.obtain(); 115 msg.what = EVENT_FRAME_BUFFER; 116 msg.obj = array; 117 notifyUiHandlers(msg); 118 return ""; 119 } 120 121 } 122