| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.SystemClock; |
| import android.util.Log; |
| |
| /** |
| * Object used to report movement (mouse, pen, finger, trackball) events. This |
| * class may hold either absolute or relative movements, depending on what |
| * it is being used for. |
| */ |
| public final class MotionEvent implements Parcelable { |
| private static final long MS_PER_NS = 1000000; |
| static final boolean DEBUG_POINTERS = false; |
| |
| /** |
| * Bit mask of the parts of the action code that are the action itself. |
| */ |
| public static final int ACTION_MASK = 0xff; |
| |
| /** |
| * Constant for {@link #getAction}: A pressed gesture has started, the |
| * motion contains the initial starting location. |
| */ |
| public static final int ACTION_DOWN = 0; |
| |
| /** |
| * Constant for {@link #getAction}: A pressed gesture has finished, the |
| * motion contains the final release location as well as any intermediate |
| * points since the last down or move event. |
| */ |
| public static final int ACTION_UP = 1; |
| |
| /** |
| * Constant for {@link #getAction}: A change has happened during a |
| * press gesture (between {@link #ACTION_DOWN} and {@link #ACTION_UP}). |
| * The motion contains the most recent point, as well as any intermediate |
| * points since the last down or move event. |
| */ |
| public static final int ACTION_MOVE = 2; |
| |
| /** |
| * Constant for {@link #getAction}: The current gesture has been aborted. |
| * You will not receive any more points in it. You should treat this as |
| * an up event, but not perform any action that you normally would. |
| */ |
| public static final int ACTION_CANCEL = 3; |
| |
| /** |
| * Constant for {@link #getAction}: A movement has happened outside of the |
| * normal bounds of the UI element. This does not provide a full gesture, |
| * but only the initial location of the movement/touch. |
| */ |
| public static final int ACTION_OUTSIDE = 4; |
| |
| /** |
| * A non-primary pointer has gone down. The bits in |
| * {@link #ACTION_POINTER_ID_MASK} indicate which pointer changed. |
| */ |
| public static final int ACTION_POINTER_DOWN = 5; |
| |
| /** |
| * A non-primary pointer has gone up. The bits in |
| * {@link #ACTION_POINTER_ID_MASK} indicate which pointer changed. |
| */ |
| public static final int ACTION_POINTER_UP = 6; |
| |
| /** |
| * Bits in the action code that represent a pointer index, used with |
| * {@link #ACTION_POINTER_DOWN} and {@link #ACTION_POINTER_UP}. Shifting |
| * down by {@link #ACTION_POINTER_INDEX_SHIFT} provides the actual pointer |
| * index where the data for the pointer going up or down can be found; you can |
| * get its identifier with {@link #getPointerId(int)} and the actual |
| * data with {@link #getX(int)} etc. |
| */ |
| public static final int ACTION_POINTER_INDEX_MASK = 0xff00; |
| |
| /** |
| * Bit shift for the action bits holding the pointer index as |
| * defined by {@link #ACTION_POINTER_INDEX_MASK}. |
| */ |
| public static final int ACTION_POINTER_INDEX_SHIFT = 8; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_DOWN}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_1_DOWN = ACTION_POINTER_DOWN | 0x0000; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_DOWN}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_2_DOWN = ACTION_POINTER_DOWN | 0x0100; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_DOWN}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_3_DOWN = ACTION_POINTER_DOWN | 0x0200; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_UP}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_1_UP = ACTION_POINTER_UP | 0x0000; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_UP}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_2_UP = ACTION_POINTER_UP | 0x0100; |
| |
| /** |
| * @deprecated Use {@link #ACTION_POINTER_INDEX_MASK} to retrieve the |
| * data index associated with {@link #ACTION_POINTER_UP}. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_3_UP = ACTION_POINTER_UP | 0x0200; |
| |
| /** |
| * @deprecated Renamed to {@link #ACTION_POINTER_INDEX_MASK} to match |
| * the actual data contained in these bits. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_ID_MASK = 0xff00; |
| |
| /** |
| * @deprecated Renamed to {@link #ACTION_POINTER_INDEX_SHIFT} to match |
| * the actual data contained in these bits. |
| */ |
| @Deprecated |
| public static final int ACTION_POINTER_ID_SHIFT = 8; |
| |
| private static final boolean TRACK_RECYCLED_LOCATION = false; |
| |
| /** |
| * Flag indicating the motion event intersected the top edge of the screen. |
| */ |
| public static final int EDGE_TOP = 0x00000001; |
| |
| /** |
| * Flag indicating the motion event intersected the bottom edge of the screen. |
| */ |
| public static final int EDGE_BOTTOM = 0x00000002; |
| |
| /** |
| * Flag indicating the motion event intersected the left edge of the screen. |
| */ |
| public static final int EDGE_LEFT = 0x00000004; |
| |
| /** |
| * Flag indicating the motion event intersected the right edge of the screen. |
| */ |
| public static final int EDGE_RIGHT = 0x00000008; |
| |
| /** |
| * Offset for the sample's X coordinate. |
| * @hide |
| */ |
| static public final int SAMPLE_X = 0; |
| |
| /** |
| * Offset for the sample's Y coordinate. |
| * @hide |
| */ |
| static public final int SAMPLE_Y = 1; |
| |
| /** |
| * Offset for the sample's X coordinate. |
| * @hide |
| */ |
| static public final int SAMPLE_PRESSURE = 2; |
| |
| /** |
| * Offset for the sample's X coordinate. |
| * @hide |
| */ |
| static public final int SAMPLE_SIZE = 3; |
| |
| /** |
| * Number of data items for each sample. |
| * @hide |
| */ |
| static public final int NUM_SAMPLE_DATA = 4; |
| |
| /** |
| * Number of possible pointers. |
| * @hide |
| */ |
| static public final int BASE_AVAIL_POINTERS = 5; |
| |
| static private final int BASE_AVAIL_SAMPLES = 8; |
| |
| static private final int MAX_RECYCLED = 10; |
| static private Object gRecyclerLock = new Object(); |
| static private int gRecyclerUsed = 0; |
| static private MotionEvent gRecyclerTop = null; |
| |
| private long mDownTimeNano; |
| private int mAction; |
| private float mXOffset; |
| private float mYOffset; |
| private float mXPrecision; |
| private float mYPrecision; |
| private int mDeviceId; |
| private int mEdgeFlags; |
| private int mMetaState; |
| |
| private int mNumPointers; |
| private int mNumSamples; |
| |
| private int mLastDataSampleIndex; |
| private int mLastEventTimeNanoSampleIndex; |
| |
| // Array of mNumPointers size of identifiers for each pointer of data. |
| private int[] mPointerIdentifiers; |
| |
| // Array of (mNumSamples * mNumPointers * NUM_SAMPLE_DATA) size of event data. |
| // Samples are ordered from oldest to newest. |
| private float[] mDataSamples; |
| |
| // Array of mNumSamples size of event time stamps in nanoseconds. |
| // Samples are ordered from oldest to newest. |
| private long[] mEventTimeNanoSamples; |
| |
| private MotionEvent mNext; |
| private RuntimeException mRecycledLocation; |
| private boolean mRecycled; |
| |
| private MotionEvent(int pointerCount, int sampleCount) { |
| mPointerIdentifiers = new int[pointerCount]; |
| mDataSamples = new float[pointerCount * sampleCount * NUM_SAMPLE_DATA]; |
| mEventTimeNanoSamples = new long[sampleCount]; |
| } |
| |
| static private MotionEvent obtain(int pointerCount, int sampleCount) { |
| final MotionEvent ev; |
| synchronized (gRecyclerLock) { |
| if (gRecyclerTop == null) { |
| if (pointerCount < BASE_AVAIL_POINTERS) { |
| pointerCount = BASE_AVAIL_POINTERS; |
| } |
| if (sampleCount < BASE_AVAIL_SAMPLES) { |
| sampleCount = BASE_AVAIL_SAMPLES; |
| } |
| return new MotionEvent(pointerCount, sampleCount); |
| } |
| ev = gRecyclerTop; |
| gRecyclerTop = ev.mNext; |
| gRecyclerUsed -= 1; |
| } |
| ev.mRecycledLocation = null; |
| ev.mRecycled = false; |
| ev.mNext = null; |
| |
| if (ev.mPointerIdentifiers.length < pointerCount) { |
| ev.mPointerIdentifiers = new int[pointerCount]; |
| } |
| |
| if (ev.mEventTimeNanoSamples.length < sampleCount) { |
| ev.mEventTimeNanoSamples = new long[sampleCount]; |
| } |
| |
| final int neededDataSamplesLength = pointerCount * sampleCount * NUM_SAMPLE_DATA; |
| if (ev.mDataSamples.length < neededDataSamplesLength) { |
| ev.mDataSamples = new float[neededDataSamplesLength]; |
| } |
| |
| return ev; |
| } |
| |
| /** |
| * Create a new MotionEvent, filling in all of the basic values that |
| * define the motion. |
| * |
| * @param downTime The time (in ms) when the user originally pressed down to start |
| * a stream of position events. This must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param eventTime The the time (in ms) when this specific event was generated. This |
| * must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param eventTimeNano The the time (in ns) when this specific event was generated. This |
| * must be obtained from {@link System#nanoTime()}. |
| * @param action The kind of action being performed -- one of either |
| * {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or |
| * {@link #ACTION_CANCEL}. |
| * @param pointers The number of points that will be in this event. |
| * @param inPointerIds An array of <em>pointers</em> values providing |
| * an identifier for each pointer. |
| * @param inData An array of <em>pointers*NUM_SAMPLE_DATA</em> of initial |
| * data samples for the event. |
| * @param metaState The state of any meta / modifier keys that were in effect when |
| * the event was generated. |
| * @param xPrecision The precision of the X coordinate being reported. |
| * @param yPrecision The precision of the Y coordinate being reported. |
| * @param deviceId The id for the device that this event came from. An id of |
| * zero indicates that the event didn't come from a physical device; other |
| * numbers are arbitrary and you shouldn't depend on the values. |
| * @param edgeFlags A bitfield indicating which edges, if any, where touched by this |
| * MotionEvent. |
| * |
| * @hide |
| */ |
| static public MotionEvent obtainNano(long downTime, long eventTime, long eventTimeNano, |
| int action, int pointers, int[] inPointerIds, float[] inData, int metaState, |
| float xPrecision, float yPrecision, int deviceId, int edgeFlags) { |
| MotionEvent ev = obtain(pointers, 1); |
| ev.mDeviceId = deviceId; |
| ev.mEdgeFlags = edgeFlags; |
| ev.mDownTimeNano = downTime * MS_PER_NS; |
| ev.mAction = action; |
| ev.mMetaState = metaState; |
| ev.mXOffset = 0; |
| ev.mYOffset = 0; |
| ev.mXPrecision = xPrecision; |
| ev.mYPrecision = yPrecision; |
| |
| ev.mNumPointers = pointers; |
| ev.mNumSamples = 1; |
| |
| ev.mLastDataSampleIndex = 0; |
| ev.mLastEventTimeNanoSampleIndex = 0; |
| |
| System.arraycopy(inPointerIds, 0, ev.mPointerIdentifiers, 0, pointers); |
| |
| ev.mEventTimeNanoSamples[0] = eventTimeNano; |
| |
| System.arraycopy(inData, 0, ev.mDataSamples, 0, pointers * NUM_SAMPLE_DATA); |
| |
| if (DEBUG_POINTERS) { |
| StringBuilder sb = new StringBuilder(128); |
| sb.append("New:"); |
| for (int i = 0; i < pointers; i++) { |
| sb.append(" #"); |
| sb.append(ev.getPointerId(i)); |
| sb.append("("); |
| sb.append(ev.getX(i)); |
| sb.append(","); |
| sb.append(ev.getY(i)); |
| sb.append(")"); |
| } |
| Log.v("MotionEvent", sb.toString()); |
| } |
| |
| return ev; |
| } |
| |
| /** |
| * Create a new MotionEvent, filling in all of the basic values that |
| * define the motion. |
| * |
| * @param downTime The time (in ms) when the user originally pressed down to start |
| * a stream of position events. This must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param eventTime The the time (in ms) when this specific event was generated. This |
| * must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param action The kind of action being performed -- one of either |
| * {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or |
| * {@link #ACTION_CANCEL}. |
| * @param x The X coordinate of this event. |
| * @param y The Y coordinate of this event. |
| * @param pressure The current pressure of this event. The pressure generally |
| * ranges from 0 (no pressure at all) to 1 (normal pressure), however |
| * values higher than 1 may be generated depending on the calibration of |
| * the input device. |
| * @param size A scaled value of the approximate size of the area being pressed when |
| * touched with the finger. The actual value in pixels corresponding to the finger |
| * touch is normalized with a device specific range of values |
| * and scaled to a value between 0 and 1. |
| * @param metaState The state of any meta / modifier keys that were in effect when |
| * the event was generated. |
| * @param xPrecision The precision of the X coordinate being reported. |
| * @param yPrecision The precision of the Y coordinate being reported. |
| * @param deviceId The id for the device that this event came from. An id of |
| * zero indicates that the event didn't come from a physical device; other |
| * numbers are arbitrary and you shouldn't depend on the values. |
| * @param edgeFlags A bitfield indicating which edges, if any, where touched by this |
| * MotionEvent. |
| */ |
| static public MotionEvent obtain(long downTime, long eventTime, int action, |
| float x, float y, float pressure, float size, int metaState, |
| float xPrecision, float yPrecision, int deviceId, int edgeFlags) { |
| MotionEvent ev = obtain(1, 1); |
| ev.mDeviceId = deviceId; |
| ev.mEdgeFlags = edgeFlags; |
| ev.mDownTimeNano = downTime * MS_PER_NS; |
| ev.mAction = action; |
| ev.mMetaState = metaState; |
| ev.mXOffset = 0; |
| ev.mYOffset = 0; |
| ev.mXPrecision = xPrecision; |
| ev.mYPrecision = yPrecision; |
| |
| ev.mNumPointers = 1; |
| ev.mNumSamples = 1; |
| |
| ev.mLastDataSampleIndex = 0; |
| ev.mLastEventTimeNanoSampleIndex = 0; |
| |
| ev.mPointerIdentifiers[0] = 0; |
| |
| ev.mEventTimeNanoSamples[0] = eventTime * MS_PER_NS; |
| |
| float[] dataSamples = ev.mDataSamples; |
| dataSamples[SAMPLE_X] = x; |
| dataSamples[SAMPLE_Y] = y; |
| dataSamples[SAMPLE_PRESSURE] = pressure; |
| dataSamples[SAMPLE_SIZE] = size; |
| return ev; |
| } |
| |
| /** |
| * Create a new MotionEvent, filling in all of the basic values that |
| * define the motion. |
| * |
| * @param downTime The time (in ms) when the user originally pressed down to start |
| * a stream of position events. This must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param eventTime The the time (in ms) when this specific event was generated. This |
| * must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param action The kind of action being performed -- one of either |
| * {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or |
| * {@link #ACTION_CANCEL}. |
| * @param pointers The number of pointers that are active in this event. |
| * @param x The X coordinate of this event. |
| * @param y The Y coordinate of this event. |
| * @param pressure The current pressure of this event. The pressure generally |
| * ranges from 0 (no pressure at all) to 1 (normal pressure), however |
| * values higher than 1 may be generated depending on the calibration of |
| * the input device. |
| * @param size A scaled value of the approximate size of the area being pressed when |
| * touched with the finger. The actual value in pixels corresponding to the finger |
| * touch is normalized with a device specific range of values |
| * and scaled to a value between 0 and 1. |
| * @param metaState The state of any meta / modifier keys that were in effect when |
| * the event was generated. |
| * @param xPrecision The precision of the X coordinate being reported. |
| * @param yPrecision The precision of the Y coordinate being reported. |
| * @param deviceId The id for the device that this event came from. An id of |
| * zero indicates that the event didn't come from a physical device; other |
| * numbers are arbitrary and you shouldn't depend on the values. |
| * @param edgeFlags A bitfield indicating which edges, if any, where touched by this |
| * MotionEvent. |
| * |
| * @deprecated Use {@link #obtain(long, long, int, float, float, float, float, int, float, float, int, int)} |
| * instead. |
| */ |
| @Deprecated |
| static public MotionEvent obtain(long downTime, long eventTime, int action, |
| int pointers, float x, float y, float pressure, float size, int metaState, |
| float xPrecision, float yPrecision, int deviceId, int edgeFlags) { |
| return obtain(downTime, eventTime, action, x, y, pressure, size, |
| metaState, xPrecision, yPrecision, deviceId, edgeFlags); |
| } |
| |
| /** |
| * Create a new MotionEvent, filling in a subset of the basic motion |
| * values. Those not specified here are: device id (always 0), pressure |
| * and size (always 1), x and y precision (always 1), and edgeFlags (always 0). |
| * |
| * @param downTime The time (in ms) when the user originally pressed down to start |
| * a stream of position events. This must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param eventTime The the time (in ms) when this specific event was generated. This |
| * must be obtained from {@link SystemClock#uptimeMillis()}. |
| * @param action The kind of action being performed -- one of either |
| * {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or |
| * {@link #ACTION_CANCEL}. |
| * @param x The X coordinate of this event. |
| * @param y The Y coordinate of this event. |
| * @param metaState The state of any meta / modifier keys that were in effect when |
| * the event was generated. |
| */ |
| static public MotionEvent obtain(long downTime, long eventTime, int action, |
| float x, float y, int metaState) { |
| return obtain(downTime, eventTime, action, x, y, 1.0f, 1.0f, |
| metaState, 1.0f, 1.0f, 0, 0); |
| } |
| |
| /** |
| * Create a new MotionEvent, copying from an existing one. |
| */ |
| static public MotionEvent obtain(MotionEvent o) { |
| MotionEvent ev = obtain(o.mNumPointers, o.mNumSamples); |
| ev.mDeviceId = o.mDeviceId; |
| ev.mEdgeFlags = o.mEdgeFlags; |
| ev.mDownTimeNano = o.mDownTimeNano; |
| ev.mAction = o.mAction; |
| ev.mMetaState = o.mMetaState; |
| ev.mXOffset = o.mXOffset; |
| ev.mYOffset = o.mYOffset; |
| ev.mXPrecision = o.mXPrecision; |
| ev.mYPrecision = o.mYPrecision; |
| int numPointers = ev.mNumPointers = o.mNumPointers; |
| int numSamples = ev.mNumSamples = o.mNumSamples; |
| |
| ev.mLastDataSampleIndex = o.mLastDataSampleIndex; |
| ev.mLastEventTimeNanoSampleIndex = o.mLastEventTimeNanoSampleIndex; |
| |
| System.arraycopy(o.mPointerIdentifiers, 0, ev.mPointerIdentifiers, 0, numPointers); |
| |
| System.arraycopy(o.mEventTimeNanoSamples, 0, ev.mEventTimeNanoSamples, 0, numSamples); |
| |
| System.arraycopy(o.mDataSamples, 0, ev.mDataSamples, 0, |
| numPointers * numSamples * NUM_SAMPLE_DATA); |
| return ev; |
| } |
| |
| /** |
| * Create a new MotionEvent, copying from an existing one, but not including |
| * any historical point information. |
| */ |
| static public MotionEvent obtainNoHistory(MotionEvent o) { |
| MotionEvent ev = obtain(o.mNumPointers, 1); |
| ev.mDeviceId = o.mDeviceId; |
| ev.mEdgeFlags = o.mEdgeFlags; |
| ev.mDownTimeNano = o.mDownTimeNano; |
| ev.mAction = o.mAction; |
| ev.mMetaState = o.mMetaState; |
| ev.mXOffset = o.mXOffset; |
| ev.mYOffset = o.mYOffset; |
| ev.mXPrecision = o.mXPrecision; |
| ev.mYPrecision = o.mYPrecision; |
| |
| int numPointers = ev.mNumPointers = o.mNumPointers; |
| ev.mNumSamples = 1; |
| |
| ev.mLastDataSampleIndex = 0; |
| ev.mLastEventTimeNanoSampleIndex = 0; |
| |
| System.arraycopy(o.mPointerIdentifiers, 0, ev.mPointerIdentifiers, 0, numPointers); |
| |
| ev.mEventTimeNanoSamples[0] = o.mEventTimeNanoSamples[o.mLastEventTimeNanoSampleIndex]; |
| |
| System.arraycopy(o.mDataSamples, o.mLastDataSampleIndex, ev.mDataSamples, 0, |
| numPointers * NUM_SAMPLE_DATA); |
| return ev; |
| } |
| |
| /** |
| * Recycle the MotionEvent, to be re-used by a later caller. After calling |
| * this function you must not ever touch the event again. |
| */ |
| public final void recycle() { |
| // Ensure recycle is only called once! |
| if (TRACK_RECYCLED_LOCATION) { |
| if (mRecycledLocation != null) { |
| throw new RuntimeException(toString() + " recycled twice!", mRecycledLocation); |
| } |
| mRecycledLocation = new RuntimeException("Last recycled here"); |
| //Log.w("MotionEvent", "Recycling event " + this, mRecycledLocation); |
| } else { |
| if (mRecycled) { |
| throw new RuntimeException(toString() + " recycled twice!"); |
| } |
| mRecycled = true; |
| } |
| |
| synchronized (gRecyclerLock) { |
| if (gRecyclerUsed < MAX_RECYCLED) { |
| gRecyclerUsed++; |
| mNumSamples = 0; |
| mNext = gRecyclerTop; |
| gRecyclerTop = this; |
| } |
| } |
| } |
| |
| /** |
| * Scales down the coordination of this event by the given scale. |
| * |
| * @hide |
| */ |
| public final void scale(float scale) { |
| mXOffset *= scale; |
| mYOffset *= scale; |
| mXPrecision *= scale; |
| mYPrecision *= scale; |
| |
| float[] history = mDataSamples; |
| final int length = mNumPointers * mNumSamples * NUM_SAMPLE_DATA; |
| for (int i = 0; i < length; i += NUM_SAMPLE_DATA) { |
| history[i + SAMPLE_X] *= scale; |
| history[i + SAMPLE_Y] *= scale; |
| // no need to scale pressure |
| history[i + SAMPLE_SIZE] *= scale; // TODO: square this? |
| } |
| } |
| |
| /** |
| * Return the kind of action being performed -- one of either |
| * {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or |
| * {@link #ACTION_CANCEL}. Consider using {@link #getActionMasked} |
| * and {@link #getActionIndex} to retrieve the separate masked action |
| * and pointer index. |
| */ |
| public final int getAction() { |
| return mAction; |
| } |
| |
| /** |
| * Return the masked action being performed, without pointer index |
| * information. May be any of the actions: {@link #ACTION_DOWN}, |
| * {@link #ACTION_MOVE}, {@link #ACTION_UP}, {@link #ACTION_CANCEL}, |
| * {@link #ACTION_POINTER_DOWN}, or {@link #ACTION_POINTER_UP}. |
| * Use {@link #getActionIndex} to return the index associated with |
| * pointer actions. |
| */ |
| public final int getActionMasked() { |
| return mAction & ACTION_MASK; |
| } |
| |
| /** |
| * For {@link #ACTION_POINTER_DOWN} or {@link #ACTION_POINTER_UP} |
| * as returned by {@link #getActionMasked}, this returns the associated |
| * pointer index. The index may be used with {@link #getPointerId(int)}, |
| * {@link #getX(int)}, {@link #getY(int)}, {@link #getPressure(int)}, |
| * and {@link #getSize(int)} to get information about the pointer that has |
| * gone down or up. |
| */ |
| public final int getActionIndex() { |
| return (mAction & ACTION_POINTER_INDEX_MASK) >> ACTION_POINTER_INDEX_SHIFT; |
| } |
| |
| /** |
| * Returns the time (in ms) when the user originally pressed down to start |
| * a stream of position events. |
| */ |
| public final long getDownTime() { |
| return mDownTimeNano / MS_PER_NS; |
| } |
| |
| /** |
| * Returns the time (in ms) when this specific event was generated. |
| */ |
| public final long getEventTime() { |
| return mEventTimeNanoSamples[mLastEventTimeNanoSampleIndex] / MS_PER_NS; |
| } |
| |
| /** |
| * Returns the time (in ns) when this specific event was generated. |
| * The value is in nanosecond precision but it may not have nanosecond accuracy. |
| * |
| * @hide |
| */ |
| public final long getEventTimeNano() { |
| return mEventTimeNanoSamples[mLastEventTimeNanoSampleIndex]; |
| } |
| |
| /** |
| * {@link #getX(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getX() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_X] + mXOffset; |
| } |
| |
| /** |
| * {@link #getY(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getY() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_Y] + mYOffset; |
| } |
| |
| /** |
| * {@link #getPressure(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getPressure() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_PRESSURE]; |
| } |
| |
| /** |
| * {@link #getSize(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getSize() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_SIZE]; |
| } |
| |
| /** |
| * The number of pointers of data contained in this event. Always |
| * >= 1. |
| */ |
| public final int getPointerCount() { |
| return mNumPointers; |
| } |
| |
| /** |
| * Return the pointer identifier associated with a particular pointer |
| * data index is this event. The identifier tells you the actual pointer |
| * number associated with the data, accounting for individual pointers |
| * going up and down since the start of the current gesture. |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| */ |
| public final int getPointerId(int pointerIndex) { |
| return mPointerIdentifiers[pointerIndex]; |
| } |
| |
| /** |
| * Given a pointer identifier, find the index of its data in the event. |
| * |
| * @param pointerId The identifier of the pointer to be found. |
| * @return Returns either the index of the pointer (for use with |
| * {@link #getX(int) et al.), or -1 if there is no data available for |
| * that pointer identifier. |
| */ |
| public final int findPointerIndex(int pointerId) { |
| int i = mNumPointers; |
| while (i > 0) { |
| i--; |
| if (mPointerIdentifiers[i] == pointerId) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| /** |
| * Returns the X coordinate of this event for the given pointer |
| * <em>index</em> (use {@link #getPointerId(int)} to find the pointer |
| * identifier for this index). |
| * Whole numbers are pixels; the |
| * value may have a fraction for input devices that are sub-pixel precise. |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| */ |
| public final float getX(int pointerIndex) { |
| return mDataSamples[mLastDataSampleIndex |
| + pointerIndex * NUM_SAMPLE_DATA + SAMPLE_X] + mXOffset; |
| } |
| |
| /** |
| * Returns the Y coordinate of this event for the given pointer |
| * <em>index</em> (use {@link #getPointerId(int)} to find the pointer |
| * identifier for this index). |
| * Whole numbers are pixels; the |
| * value may have a fraction for input devices that are sub-pixel precise. |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| */ |
| public final float getY(int pointerIndex) { |
| return mDataSamples[mLastDataSampleIndex |
| + pointerIndex * NUM_SAMPLE_DATA + SAMPLE_Y] + mYOffset; |
| } |
| |
| /** |
| * Returns the current pressure of this event for the given pointer |
| * <em>index</em> (use {@link #getPointerId(int)} to find the pointer |
| * identifier for this index). |
| * The pressure generally |
| * ranges from 0 (no pressure at all) to 1 (normal pressure), however |
| * values higher than 1 may be generated depending on the calibration of |
| * the input device. |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| */ |
| public final float getPressure(int pointerIndex) { |
| return mDataSamples[mLastDataSampleIndex |
| + pointerIndex * NUM_SAMPLE_DATA + SAMPLE_PRESSURE]; |
| } |
| |
| /** |
| * Returns a scaled value of the approximate size for the given pointer |
| * <em>index</em> (use {@link #getPointerId(int)} to find the pointer |
| * identifier for this index). |
| * This represents some approximation of the area of the screen being |
| * pressed; the actual value in pixels corresponding to the |
| * touch is normalized with the device specific range of values |
| * and scaled to a value between 0 and 1. The value of size can be used to |
| * determine fat touch events. |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| */ |
| public final float getSize(int pointerIndex) { |
| return mDataSamples[mLastDataSampleIndex |
| + pointerIndex * NUM_SAMPLE_DATA + SAMPLE_SIZE]; |
| } |
| |
| /** |
| * Returns the state of any meta / modifier keys that were in effect when |
| * the event was generated. This is the same values as those |
| * returned by {@link KeyEvent#getMetaState() KeyEvent.getMetaState}. |
| * |
| * @return an integer in which each bit set to 1 represents a pressed |
| * meta key |
| * |
| * @see KeyEvent#getMetaState() |
| */ |
| public final int getMetaState() { |
| return mMetaState; |
| } |
| |
| /** |
| * Returns the original raw X coordinate of this event. For touch |
| * events on the screen, this is the original location of the event |
| * on the screen, before it had been adjusted for the containing window |
| * and views. |
| */ |
| public final float getRawX() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_X]; |
| } |
| |
| /** |
| * Returns the original raw Y coordinate of this event. For touch |
| * events on the screen, this is the original location of the event |
| * on the screen, before it had been adjusted for the containing window |
| * and views. |
| */ |
| public final float getRawY() { |
| return mDataSamples[mLastDataSampleIndex + SAMPLE_Y]; |
| } |
| |
| /** |
| * Return the precision of the X coordinates being reported. You can |
| * multiple this number with {@link #getX} to find the actual hardware |
| * value of the X coordinate. |
| * @return Returns the precision of X coordinates being reported. |
| */ |
| public final float getXPrecision() { |
| return mXPrecision; |
| } |
| |
| /** |
| * Return the precision of the Y coordinates being reported. You can |
| * multiple this number with {@link #getY} to find the actual hardware |
| * value of the Y coordinate. |
| * @return Returns the precision of Y coordinates being reported. |
| */ |
| public final float getYPrecision() { |
| return mYPrecision; |
| } |
| |
| /** |
| * Returns the number of historical points in this event. These are |
| * movements that have occurred between this event and the previous event. |
| * This only applies to ACTION_MOVE events -- all other actions will have |
| * a size of 0. |
| * |
| * @return Returns the number of historical points in the event. |
| */ |
| public final int getHistorySize() { |
| return mLastEventTimeNanoSampleIndex; |
| } |
| |
| /** |
| * Returns the time that a historical movement occurred between this event |
| * and the previous event. Only applies to ACTION_MOVE events. |
| * |
| * @param pos Which historical value to return; must be less than |
| * {@link #getHistorySize} |
| * |
| * @see #getHistorySize |
| * @see #getEventTime |
| */ |
| public final long getHistoricalEventTime(int pos) { |
| return mEventTimeNanoSamples[pos] / MS_PER_NS; |
| } |
| |
| /** |
| * {@link #getHistoricalX(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getHistoricalX(int pos) { |
| return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_X] + mXOffset; |
| } |
| |
| /** |
| * {@link #getHistoricalY(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getHistoricalY(int pos) { |
| return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_Y] + mYOffset; |
| } |
| |
| /** |
| * {@link #getHistoricalPressure(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getHistoricalPressure(int pos) { |
| return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_PRESSURE]; |
| } |
| |
| /** |
| * {@link #getHistoricalSize(int)} for the first pointer index (may be an |
| * arbitrary pointer identifier). |
| */ |
| public final float getHistoricalSize(int pos) { |
| return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_SIZE]; |
| } |
| |
| /** |
| * Returns a historical X coordinate, as per {@link #getX(int)}, that |
| * occurred between this event and the previous event for the given pointer. |
| * Only applies to ACTION_MOVE events. |
| * |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| * @param pos Which historical value to return; must be less than |
| * {@link #getHistorySize} |
| * |
| * @see #getHistorySize |
| * @see #getX |
| */ |
| public final float getHistoricalX(int pointerIndex, int pos) { |
| return mDataSamples[(pos * mNumPointers + pointerIndex) |
| * NUM_SAMPLE_DATA + SAMPLE_X] + mXOffset; |
| } |
| |
| /** |
| * Returns a historical Y coordinate, as per {@link #getY(int)}, that |
| * occurred between this event and the previous event for the given pointer. |
| * Only applies to ACTION_MOVE events. |
| * |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| * @param pos Which historical value to return; must be less than |
| * {@link #getHistorySize} |
| * |
| * @see #getHistorySize |
| * @see #getY |
| */ |
| public final float getHistoricalY(int pointerIndex, int pos) { |
| return mDataSamples[(pos * mNumPointers + pointerIndex) |
| * NUM_SAMPLE_DATA + SAMPLE_Y] + mYOffset; |
| } |
| |
| /** |
| * Returns a historical pressure coordinate, as per {@link #getPressure(int)}, |
| * that occurred between this event and the previous event for the given |
| * pointer. Only applies to ACTION_MOVE events. |
| * |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| * @param pos Which historical value to return; must be less than |
| * {@link #getHistorySize} |
| * |
| * @see #getHistorySize |
| * @see #getPressure |
| */ |
| public final float getHistoricalPressure(int pointerIndex, int pos) { |
| return mDataSamples[(pos * mNumPointers + pointerIndex) |
| * NUM_SAMPLE_DATA + SAMPLE_PRESSURE]; |
| } |
| |
| /** |
| * Returns a historical size coordinate, as per {@link #getSize(int)}, that |
| * occurred between this event and the previous event for the given pointer. |
| * Only applies to ACTION_MOVE events. |
| * |
| * @param pointerIndex Raw index of pointer to retrieve. Value may be from 0 |
| * (the first pointer that is down) to {@link #getPointerCount()}-1. |
| * @param pos Which historical value to return; must be less than |
| * {@link #getHistorySize} |
| * |
| * @see #getHistorySize |
| * @see #getSize |
| */ |
| public final float getHistoricalSize(int pointerIndex, int pos) { |
| return mDataSamples[(pos * mNumPointers + pointerIndex) |
| * NUM_SAMPLE_DATA + SAMPLE_SIZE]; |
| } |
| |
| /** |
| * Return the id for the device that this event came from. An id of |
| * zero indicates that the event didn't come from a physical device; other |
| * numbers are arbitrary and you shouldn't depend on the values. |
| */ |
| public final int getDeviceId() { |
| return mDeviceId; |
| } |
| |
| /** |
| * Returns a bitfield indicating which edges, if any, were touched by this |
| * MotionEvent. For touch events, clients can use this to determine if the |
| * user's finger was touching the edge of the display. |
| * |
| * @see #EDGE_LEFT |
| * @see #EDGE_TOP |
| * @see #EDGE_RIGHT |
| * @see #EDGE_BOTTOM |
| */ |
| public final int getEdgeFlags() { |
| return mEdgeFlags; |
| } |
| |
| |
| /** |
| * Sets the bitfield indicating which edges, if any, where touched by this |
| * MotionEvent. |
| * |
| * @see #getEdgeFlags() |
| */ |
| public final void setEdgeFlags(int flags) { |
| mEdgeFlags = flags; |
| } |
| |
| /** |
| * Sets this event's action. |
| */ |
| public final void setAction(int action) { |
| mAction = action; |
| } |
| |
| /** |
| * Adjust this event's location. |
| * @param deltaX Amount to add to the current X coordinate of the event. |
| * @param deltaY Amount to add to the current Y coordinate of the event. |
| */ |
| public final void offsetLocation(float deltaX, float deltaY) { |
| mXOffset += deltaX; |
| mYOffset += deltaY; |
| } |
| |
| /** |
| * Set this event's location. Applies {@link #offsetLocation} with a |
| * delta from the current location to the given new location. |
| * |
| * @param x New absolute X location. |
| * @param y New absolute Y location. |
| */ |
| public final void setLocation(float x, float y) { |
| mXOffset = x - mDataSamples[mLastDataSampleIndex + SAMPLE_X]; |
| mYOffset = y - mDataSamples[mLastDataSampleIndex + SAMPLE_Y]; |
| } |
| |
| private final void incrementNumSamplesAndReserveStorage(int dataSampleStride) { |
| if (mNumSamples == mEventTimeNanoSamples.length) { |
| long[] newEventTimeNanoSamples = new long[mNumSamples + BASE_AVAIL_SAMPLES]; |
| System.arraycopy(mEventTimeNanoSamples, 0, newEventTimeNanoSamples, 0, mNumSamples); |
| mEventTimeNanoSamples = newEventTimeNanoSamples; |
| } |
| |
| int nextDataSampleIndex = mLastDataSampleIndex + dataSampleStride; |
| if (nextDataSampleIndex + dataSampleStride > mDataSamples.length) { |
| float[] newDataSamples = new float[nextDataSampleIndex |
| + BASE_AVAIL_SAMPLES * dataSampleStride]; |
| System.arraycopy(mDataSamples, 0, newDataSamples, 0, nextDataSampleIndex); |
| mDataSamples = newDataSamples; |
| } |
| |
| mLastEventTimeNanoSampleIndex = mNumSamples; |
| mLastDataSampleIndex = nextDataSampleIndex; |
| mNumSamples += 1; |
| } |
| |
| /** |
| * Add a new movement to the batch of movements in this event. The event's |
| * current location, position and size is updated to the new values. In |
| * the future, the current values in the event will be added to a list of |
| * historic values. |
| * |
| * @param eventTime The time stamp for this data. |
| * @param x The new X position. |
| * @param y The new Y position. |
| * @param pressure The new pressure. |
| * @param size The new size. |
| * @param metaState Meta key state. |
| */ |
| public final void addBatch(long eventTime, float x, float y, |
| float pressure, float size, int metaState) { |
| incrementNumSamplesAndReserveStorage(NUM_SAMPLE_DATA); |
| |
| mEventTimeNanoSamples[mLastEventTimeNanoSampleIndex] = eventTime * MS_PER_NS; |
| |
| float[] dataSamples = mDataSamples; |
| dataSamples[mLastDataSampleIndex + SAMPLE_X] = x - mXOffset; |
| dataSamples[mLastDataSampleIndex + SAMPLE_Y] = y - mYOffset; |
| dataSamples[mLastDataSampleIndex + SAMPLE_PRESSURE] = pressure; |
| dataSamples[mLastDataSampleIndex + SAMPLE_SIZE] = size; |
| |
| mMetaState |= metaState; |
| } |
| |
| /** |
| * Add a new movement to the batch of movements in this event. The |
| * input data must contain (NUM_SAMPLE_DATA * {@link #getPointerCount()}) |
| * samples of data. |
| * |
| * @param eventTime The time stamp for this data. |
| * @param inData The actual data. |
| * @param metaState Meta key state. |
| * |
| * @hide |
| */ |
| public final void addBatch(long eventTime, float[] inData, int metaState) { |
| final int numPointers = mNumPointers; |
| final int dataSampleStride = numPointers * NUM_SAMPLE_DATA; |
| incrementNumSamplesAndReserveStorage(dataSampleStride); |
| |
| mEventTimeNanoSamples[mLastEventTimeNanoSampleIndex] = eventTime * MS_PER_NS; |
| |
| float[] dataSamples = mDataSamples; |
| System.arraycopy(inData, 0, dataSamples, mLastDataSampleIndex, dataSampleStride); |
| |
| if (mXOffset != 0 || mYOffset != 0) { |
| int index = mLastEventTimeNanoSampleIndex; |
| for (int i = 0; i < numPointers; i++) { |
| dataSamples[index + SAMPLE_X] -= mXOffset; |
| dataSamples[index + SAMPLE_Y] -= mYOffset; |
| index += NUM_SAMPLE_DATA; |
| } |
| } |
| |
| mMetaState |= metaState; |
| |
| if (DEBUG_POINTERS) { |
| StringBuilder sb = new StringBuilder(128); |
| sb.append("Add:"); |
| for (int i = 0; i < mNumPointers; i++) { |
| sb.append(" #"); |
| sb.append(getPointerId(i)); |
| sb.append("("); |
| sb.append(getX(i)); |
| sb.append(","); |
| sb.append(getY(i)); |
| sb.append(")"); |
| } |
| Log.v("MotionEvent", sb.toString()); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "MotionEvent{" + Integer.toHexString(System.identityHashCode(this)) |
| + " action=" + mAction + " x=" + getX() |
| + " y=" + getY() + " pressure=" + getPressure() + " size=" + getSize() + "}"; |
| } |
| |
| public static final Parcelable.Creator<MotionEvent> CREATOR |
| = new Parcelable.Creator<MotionEvent>() { |
| public MotionEvent createFromParcel(Parcel in) { |
| final int NP = in.readInt(); |
| final int NS = in.readInt(); |
| final int NI = NP * NS * NUM_SAMPLE_DATA; |
| |
| MotionEvent ev = obtain(NP, NS); |
| ev.mNumPointers = NP; |
| ev.mNumSamples = NS; |
| |
| ev.mDownTimeNano = in.readLong(); |
| ev.mAction = in.readInt(); |
| ev.mXOffset = in.readFloat(); |
| ev.mYOffset = in.readFloat(); |
| ev.mXPrecision = in.readFloat(); |
| ev.mYPrecision = in.readFloat(); |
| ev.mDeviceId = in.readInt(); |
| ev.mEdgeFlags = in.readInt(); |
| ev.mMetaState = in.readInt(); |
| |
| final int[] pointerIdentifiers = ev.mPointerIdentifiers; |
| for (int i = 0; i < NP; i++) { |
| pointerIdentifiers[i] = in.readInt(); |
| } |
| |
| final long[] eventTimeNanoSamples = ev.mEventTimeNanoSamples; |
| for (int i = 0; i < NS; i++) { |
| eventTimeNanoSamples[i] = in.readLong(); |
| } |
| |
| final float[] dataSamples = ev.mDataSamples; |
| for (int i = 0; i < NI; i++) { |
| dataSamples[i] = in.readFloat(); |
| } |
| |
| ev.mLastEventTimeNanoSampleIndex = NS - 1; |
| ev.mLastDataSampleIndex = (NS - 1) * NP * NUM_SAMPLE_DATA; |
| return ev; |
| } |
| |
| public MotionEvent[] newArray(int size) { |
| return new MotionEvent[size]; |
| } |
| }; |
| |
| public int describeContents() { |
| return 0; |
| } |
| |
| public void writeToParcel(Parcel out, int flags) { |
| final int NP = mNumPointers; |
| final int NS = mNumSamples; |
| final int NI = NP * NS * NUM_SAMPLE_DATA; |
| |
| out.writeInt(NP); |
| out.writeInt(NS); |
| |
| out.writeLong(mDownTimeNano); |
| out.writeInt(mAction); |
| out.writeFloat(mXOffset); |
| out.writeFloat(mYOffset); |
| out.writeFloat(mXPrecision); |
| out.writeFloat(mYPrecision); |
| out.writeInt(mDeviceId); |
| out.writeInt(mEdgeFlags); |
| out.writeInt(mMetaState); |
| |
| final int[] pointerIdentifiers = mPointerIdentifiers; |
| for (int i = 0; i < NP; i++) { |
| out.writeInt(pointerIdentifiers[i]); |
| } |
| |
| final long[] eventTimeNanoSamples = mEventTimeNanoSamples; |
| for (int i = 0; i < NS; i++) { |
| out.writeLong(eventTimeNanoSamples[i]); |
| } |
| |
| final float[] dataSamples = mDataSamples; |
| for (int i = 0; i < NI; i++) { |
| out.writeFloat(dataSamples[i]); |
| } |
| } |
| } |
