Java程序
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/*
* 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 {
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;
/**
* Synonym for {@link #ACTION_POINTER_DOWN} with
* {@link #ACTION_POINTER_ID_MASK} of 0: the primary pointer has gone done.
*/
public static final int ACTION_POINTER_1_DOWN = ACTION_POINTER_DOWN | 0x0000;
/**
* Synonym for {@link #ACTION_POINTER_DOWN} with
* {@link #ACTION_POINTER_ID_MASK} of 1: the secondary pointer has gone done.
*/
public static final int ACTION_POINTER_2_DOWN = ACTION_POINTER_DOWN | 0x0100;
/**
* Synonym for {@link #ACTION_POINTER_DOWN} with
* {@link #ACTION_POINTER_ID_MASK} of 2: the tertiary pointer has gone done.
*/
public static final int ACTION_POINTER_3_DOWN = ACTION_POINTER_DOWN | 0x0200;
/**
* 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;
/**
* Synonym for {@link #ACTION_POINTER_UP} with
* {@link #ACTION_POINTER_ID_MASK} of 0: the primary pointer has gone up.
*/
public static final int ACTION_POINTER_1_UP = ACTION_POINTER_UP | 0x0000;
/**
* Synonym for {@link #ACTION_POINTER_UP} with
* {@link #ACTION_POINTER_ID_MASK} of 1: the secondary pointer has gone up.
*/
public static final int ACTION_POINTER_2_UP = ACTION_POINTER_UP | 0x0100;
/**
* Synonym for {@link #ACTION_POINTER_UP} with
* {@link #ACTION_POINTER_ID_MASK} of 2: the tertiary pointer has gone up.
*/
public static final int ACTION_POINTER_3_UP = ACTION_POINTER_UP | 0x0200;
/**
* Bits in the action code that represent a pointer ID, used with
* {@link #ACTION_POINTER_DOWN} and {@link #ACTION_POINTER_UP}. Pointer IDs
* start at 0, with 0 being the primary (first) pointer in the motion. Note
* that this not <em>not</em> an index into the array of pointer values,
* which is compacted to only contain pointers that are down; the pointer
* ID for a particular index can be found with {@link #findPointerIndex}.
*/
public static final int ACTION_POINTER_ID_MASK = 0xff00;
/**
* Bit shift for the action bits holding the pointer identifier as
* defined by {@link #ACTION_POINTER_ID_MASK}.
*/
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 mDownTime;
private long mEventTimeNano;
private int mAction;
private float mRawX;
private float mRawY;
private float mXPrecision;
private float mYPrecision;
private int mDeviceId;
private int mEdgeFlags;
private int mMetaState;
// Here is the actual event data. Note that the order of the array
// is a little odd: the first entry is the most recent, and the ones
// following it are the historical data from oldest to newest. This
// allows us to easily retrieve the most recent data, without having
// to copy the arrays every time a new sample is added.
private int mNumPointers;
private int mNumSamples;
// 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.
private float[] mDataSamples;
// Array of mNumSamples size of time stamps.
private long[] mTimeSamples;
private MotionEvent mNext;
private RuntimeException mRecycledLocation;
private boolean mRecycled;
private MotionEvent() {
mPointerIdentifiers = new int[BASE_AVAIL_POINTERS];
mDataSamples = new float[BASE_AVAIL_POINTERS*BASE_AVAIL_SAMPLES*NUM_SAMPLE_DATA];
mTimeSamples = new long[BASE_AVAIL_SAMPLES];
}
static private MotionEvent obtain() {
synchronized (gRecyclerLock) {
if (gRecyclerTop == null) {
return new MotionEvent();
}
MotionEvent ev = gRecyclerTop;
gRecyclerTop = ev.mNext;
gRecyclerUsed--;
ev.mRecycledLocation = null;
ev.mRecycled = false;
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();
ev.mDeviceId = deviceId;
ev.mEdgeFlags = edgeFlags;
ev.mDownTime = downTime;
ev.mEventTimeNano = eventTimeNano;
ev.mAction = action;
ev.mMetaState = metaState;
ev.mRawX = inData[SAMPLE_X];
ev.mRawY = inData[SAMPLE_Y];
ev.mXPrecision = xPrecision;
ev.mYPrecision = yPrecision;
ev.mNumPointers = pointers;
ev.mNumSamples = 1;
int[] pointerIdentifiers = ev.mPointerIdentifiers;
if (pointerIdentifiers.length < pointers) {
ev.mPointerIdentifiers = pointerIdentifiers = new int[pointers];
}
System.arraycopy(inPointerIds, 0, pointerIdentifiers, 0, pointers);
final int ND = pointers * NUM_SAMPLE_DATA;
float[] dataSamples = ev.mDataSamples;
if (dataSamples.length < ND) {
ev.mDataSamples = dataSamples = new float[ND];
}
System.arraycopy(inData, 0, dataSamples, 0, ND);
ev.mTimeSamples[0] = eventTime;
if (DEBUG_POINTERS) {
StringBuilder sb = new StringBuilder(128);
sb.append("New:");
for (int i=0; i<pointers; i++) {
sb.append(" #");
sb.append(ev.mPointerIdentifiers[i]);
sb.append("(");
sb.append(ev.mDataSamples[(i*NUM_SAMPLE_DATA) + SAMPLE_X]);
sb.append(",");
sb.append(ev.mDataSamples[(i*NUM_SAMPLE_DATA) + SAMPLE_Y]);
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();
ev.mDeviceId = deviceId;
ev.mEdgeFlags = edgeFlags;
ev.mDownTime = downTime;
ev.mEventTimeNano = eventTime * 1000000;
ev.mAction = action;
ev.mMetaState = metaState;
ev.mXPrecision = xPrecision;
ev.mYPrecision = yPrecision;
ev.mNumPointers = 1;
ev.mNumSamples = 1;
int[] pointerIds = ev.mPointerIdentifiers;
pointerIds[0] = 0;
float[] data = ev.mDataSamples;
data[SAMPLE_X] = ev.mRawX = x;
data[SAMPLE_Y] = ev.mRawY = y;
data[SAMPLE_PRESSURE] = pressure;
data[SAMPLE_SIZE] = size;
ev.mTimeSamples[0] = eventTime;
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.
*/
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) {
MotionEvent ev = obtain();
ev.mDeviceId = deviceId;
ev.mEdgeFlags = edgeFlags;
ev.mDownTime = downTime;
ev.mEventTimeNano = eventTime * 1000000;
ev.mAction = action;
ev.mNumPointers = pointers;
ev.mMetaState = metaState;
ev.mXPrecision = xPrecision;
ev.mYPrecision = yPrecision;
ev.mNumPointers = 1;
ev.mNumSamples = 1;
int[] pointerIds = ev.mPointerIdentifiers;
pointerIds[0] = 0;
float[] data = ev.mDataSamples;
data[SAMPLE_X] = ev.mRawX = x;
data[SAMPLE_Y] = ev.mRawY = y;
data[SAMPLE_PRESSURE] = pressure;
data[SAMPLE_SIZE] = size;
ev.mTimeSamples[0] = eventTime;
return ev;
}
/**
* 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) {
MotionEvent ev = obtain();
ev.mDeviceId = 0;
ev.mEdgeFlags = 0;
ev.mDownTime = downTime;
ev.mEventTimeNano = eventTime * 1000000;
ev.mAction = action;
ev.mNumPointers = 1;
ev.mMetaState = metaState;
ev.mXPrecision = 1.0f;
ev.mYPrecision = 1.0f;
ev.mNumPointers = 1;
ev.mNumSamples = 1;
int[] pointerIds = ev.mPointerIdentifiers;
pointerIds[0] = 0;
float[] data = ev.mDataSamples;
data[SAMPLE_X] = ev.mRawX = x;
data[SAMPLE_Y] = ev.mRawY = y;
data[SAMPLE_PRESSURE] = 1.0f;
data[SAMPLE_SIZE] = 1.0f;
ev.mTimeSamples[0] = eventTime;
return ev;
}
/**
* Scales down the coordination of this event by the given scale.
*
* @hide
*/
public void scale(float scale) {
mRawX *= scale;
mRawY *= 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?
}
}
/**
* Create a new MotionEvent, copying from an existing one.
*/
static public MotionEvent obtain(MotionEvent o) {
MotionEvent ev = obtain();
ev.mDeviceId = o.mDeviceId;
ev.mEdgeFlags = o.mEdgeFlags;
ev.mDownTime = o.mDownTime;
ev.mEventTimeNano = o.mEventTimeNano;
ev.mAction = o.mAction;
ev.mNumPointers = o.mNumPointers;
ev.mRawX = o.mRawX;
ev.mRawY = o.mRawY;
ev.mMetaState = o.mMetaState;
ev.mXPrecision = o.mXPrecision;
ev.mYPrecision = o.mYPrecision;
final int NS = ev.mNumSamples = o.mNumSamples;
if (ev.mTimeSamples.length >= NS) {
System.arraycopy(o.mTimeSamples, 0, ev.mTimeSamples, 0, NS);
} else {
ev.mTimeSamples = (long[])o.mTimeSamples.clone();
}
final int NP = (ev.mNumPointers=o.mNumPointers);
if (ev.mPointerIdentifiers.length >= NP) {
System.arraycopy(o.mPointerIdentifiers, 0, ev.mPointerIdentifiers, 0, NP);
} else {
ev.mPointerIdentifiers = (int[])o.mPointerIdentifiers.clone();
}
final int ND = NP * NS * NUM_SAMPLE_DATA;
if (ev.mDataSamples.length >= ND) {
System.arraycopy(o.mDataSamples, 0, ev.mDataSamples, 0, ND);
} else {
ev.mDataSamples = (float[])o.mDataSamples.clone();
}
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();
ev.mDeviceId = o.mDeviceId;
ev.mEdgeFlags = o.mEdgeFlags;
ev.mDownTime = o.mDownTime;
ev.mEventTimeNano = o.mEventTimeNano;
ev.mAction = o.mAction;
ev.mNumPointers = o.mNumPointers;
ev.mRawX = o.mRawX;
ev.mRawY = o.mRawY;
ev.mMetaState = o.mMetaState;
ev.mXPrecision = o.mXPrecision;
ev.mYPrecision = o.mYPrecision;
ev.mNumSamples = 1;
ev.mTimeSamples[0] = o.mTimeSamples[0];
final int NP = (ev.mNumPointers=o.mNumPointers);
if (ev.mPointerIdentifiers.length >= NP) {
System.arraycopy(o.mPointerIdentifiers, 0, ev.mPointerIdentifiers, 0, NP);
} else {
ev.mPointerIdentifiers = (int[])o.mPointerIdentifiers.clone();
}
final int ND = NP * NUM_SAMPLE_DATA;
if (ev.mDataSamples.length >= ND) {
System.arraycopy(o.mDataSamples, 0, ev.mDataSamples, 0, ND);
} else {
ev.mDataSamples = (float[])o.mDataSamples.clone();
}
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 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");
} else if (mRecycled) {
throw new RuntimeException(toString() + " recycled twice!");
}
//Log.w("MotionEvent", "Recycling event " + this, mRecycledLocation);
synchronized (gRecyclerLock) {
if (gRecyclerUsed < MAX_RECYCLED) {
gRecyclerUsed++;
mNumSamples = 0;
mNext = gRecyclerTop;
gRecyclerTop = this;
}
}
}
/**
* Return the kind of action being performed -- one of either
* {@link #ACTION_DOWN}, {@link #ACTION_MOVE}, {@link #ACTION_UP}, or
* {@link #ACTION_CANCEL}.
*/
public final int getAction() {
return mAction;
}
/**
* Returns the time (in ms) when the user originally pressed down to start
* a stream of position events.
*/
public final long getDownTime() {
return mDownTime;
}
/**
* Returns the time (in ms) when this specific event was generated.
*/
public final long getEventTime() {
return mTimeSamples[0];
}
/**
* 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 mEventTimeNano;
}
/**
* {@link #getX(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getX() {
return mDataSamples[SAMPLE_X];
}
/**
* {@link #getY(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getY() {
return mDataSamples[SAMPLE_Y];
}
/**
* {@link #getPressure(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getPressure() {
return mDataSamples[SAMPLE_PRESSURE];
}
/**
* {@link #getSize(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getSize() {
return mDataSamples[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[(pointerIndex*NUM_SAMPLE_DATA) + SAMPLE_X];
}
/**
* 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[(pointerIndex*NUM_SAMPLE_DATA) + SAMPLE_Y];
}
/**
* 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[(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[(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 mRawX;
}
/**
* 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 mRawY;
}
/**
* 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 mNumSamples - 1;
}
/**
* 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 mTimeSamples[pos + 1];
}
/**
* {@link #getHistoricalX(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalX(int pos) {
return mDataSamples[((pos + 1) * NUM_SAMPLE_DATA * mNumPointers) + SAMPLE_X];
}
/**
* {@link #getHistoricalY(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalY(int pos) {
return mDataSamples[((pos + 1) * NUM_SAMPLE_DATA * mNumPointers) + SAMPLE_Y];
}
/**
* {@link #getHistoricalPressure(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalPressure(int pos) {
return mDataSamples[((pos + 1) * NUM_SAMPLE_DATA * mNumPointers) + 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 + 1) * NUM_SAMPLE_DATA * mNumPointers) + 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 + 1) * NUM_SAMPLE_DATA * mNumPointers)
+ (pointerIndex * NUM_SAMPLE_DATA) + SAMPLE_X];
}
/**
* 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 + 1) * NUM_SAMPLE_DATA * mNumPointers)
+ (pointerIndex * NUM_SAMPLE_DATA) + SAMPLE_Y];
}
/**
* 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 + 1) * NUM_SAMPLE_DATA * 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 + 1) * NUM_SAMPLE_DATA * 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, where 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) {
final int N = mNumPointers*mNumSamples*4;
final float[] pos = mDataSamples;
for (int i=0; i<N; i+=NUM_SAMPLE_DATA) {
pos[i+SAMPLE_X] += deltaX;
pos[i+SAMPLE_Y] += 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) {
float deltaX = x-mDataSamples[SAMPLE_X];
float deltaY = y-mDataSamples[SAMPLE_Y];
if (deltaX != 0 || deltaY != 0) {
offsetLocation(deltaX, deltaY);
}
}
/**
* 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) {
float[] data = mDataSamples;
long[] times = mTimeSamples;
final int NP = mNumPointers;
final int NS = mNumSamples;
final int NI = NP*NS;
final int ND = NI * NUM_SAMPLE_DATA;
if (data.length <= ND) {
final int NEW_ND = ND + (NP * (BASE_AVAIL_SAMPLES * NUM_SAMPLE_DATA));
float[] newData = new float[NEW_ND];
System.arraycopy(data, 0, newData, 0, ND);
mDataSamples = data = newData;
}
if (times.length <= NS) {
final int NEW_NS = NS + BASE_AVAIL_SAMPLES;
long[] newHistoryTimes = new long[NEW_NS];
System.arraycopy(times, 0, newHistoryTimes, 0, NS);
mTimeSamples = times = newHistoryTimes;
}
times[NS] = times[0];
times[0] = eventTime;
final int pos = NS*NUM_SAMPLE_DATA;
data[pos+SAMPLE_X] = data[SAMPLE_X];
data[pos+SAMPLE_Y] = data[SAMPLE_Y];
data[pos+SAMPLE_PRESSURE] = data[SAMPLE_PRESSURE];
data[pos+SAMPLE_SIZE] = data[SAMPLE_SIZE];
data[SAMPLE_X] = x;
data[SAMPLE_Y] = y;
data[SAMPLE_PRESSURE] = pressure;
data[SAMPLE_SIZE] = size;
mNumSamples = NS+1;
mRawX = x;
mRawY = y;
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) {
float[] data = mDataSamples;
long[] times = mTimeSamples;
final int NP = mNumPointers;
final int NS = mNumSamples;
final int NI = NP*NS;
final int ND = NI * NUM_SAMPLE_DATA;
if (data.length < (ND+(NP*NUM_SAMPLE_DATA))) {
final int NEW_ND = ND + (NP * (BASE_AVAIL_SAMPLES * NUM_SAMPLE_DATA));
float[] newData = new float[NEW_ND];
System.arraycopy(data, 0, newData, 0, ND);
mDataSamples = data = newData;
}
if (times.length < (NS+1)) {
final int NEW_NS = NS + BASE_AVAIL_SAMPLES;
long[] newHistoryTimes = new long[NEW_NS];
System.arraycopy(times, 0, newHistoryTimes, 0, NS);
mTimeSamples = times = newHistoryTimes;
}
times[NS] = times[0];
times[0] = eventTime;
System.arraycopy(data, 0, data, ND, mNumPointers*NUM_SAMPLE_DATA);
System.arraycopy(inData, 0, data, 0, mNumPointers*NUM_SAMPLE_DATA);
mNumSamples = NS+1;
mRawX = inData[SAMPLE_X];
mRawY = inData[SAMPLE_Y];
mMetaState |= metaState;
if (DEBUG_POINTERS) {
StringBuilder sb = new StringBuilder(128);
sb.append("Add:");
for (int i=0; i<mNumPointers; i++) {
sb.append(" #");
sb.append(mPointerIdentifiers[i]);
sb.append("(");
sb.append(mDataSamples[(i*NUM_SAMPLE_DATA) + SAMPLE_X]);
sb.append(",");
sb.append(mDataSamples[(i*NUM_SAMPLE_DATA) + SAMPLE_Y]);
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) {
MotionEvent ev = obtain();
ev.readFromParcel(in);
return ev;
}
public MotionEvent[] newArray(int size) {
return new MotionEvent[size];
}
};
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel out, int flags) {
out.writeLong(mDownTime);
out.writeLong(mEventTimeNano);
out.writeInt(mAction);
out.writeInt(mMetaState);
out.writeFloat(mRawX);
out.writeFloat(mRawY);
final int NP = mNumPointers;
out.writeInt(NP);
final int NS = mNumSamples;
out.writeInt(NS);
final int NI = NP*NS;
if (NI > 0) {
int i;
int[] state = mPointerIdentifiers;
for (i=0; i<NP; i++) {
out.writeInt(state[i]);
}
final int ND = NI*NUM_SAMPLE_DATA;
float[] history = mDataSamples;
for (i=0; i<ND; i++) {
out.writeFloat(history[i]);
}
long[] times = mTimeSamples;
for (i=0; i<NS; i++) {
out.writeLong(times[i]);
}
}
out.writeFloat(mXPrecision);
out.writeFloat(mYPrecision);
out.writeInt(mDeviceId);
out.writeInt(mEdgeFlags);
}
private void readFromParcel(Parcel in) {
mDownTime = in.readLong();
mEventTimeNano = in.readLong();
mAction = in.readInt();
mMetaState = in.readInt();
mRawX = in.readFloat();
mRawY = in.readFloat();
final int NP = in.readInt();
mNumPointers = NP;
final int NS = in.readInt();
mNumSamples = NS;
final int NI = NP*NS;
if (NI > 0) {
int[] ids = mPointerIdentifiers;
if (ids.length < NP) {
mPointerIdentifiers = ids = new int[NP];
}
for (int i=0; i<NP; i++) {
ids[i] = in.readInt();
}
float[] history = mDataSamples;
final int ND = NI*NUM_SAMPLE_DATA;
if (history.length < ND) {
mDataSamples = history = new float[ND];
}
for (int i=0; i<ND; i++) {
history[i] = in.readFloat();
}
long[] times = mTimeSamples;
if (times == null || times.length < NS) {
mTimeSamples = times = new long[NS];
}
for (int i=0; i<NS; i++) {
times[i] = in.readLong();
}
}
mXPrecision = in.readFloat();
mYPrecision = in.readFloat();
mDeviceId = in.readInt();
mEdgeFlags = in.readInt();
}
}