/*
* 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;
/**
* 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.
*
* Refer to {@link InputDevice} for information about how different kinds of
* input devices and sources represent pointer coordinates.
*/
public final class MotionEvent extends InputEvent implements Parcelable {
private static final long MS_PER_NS = 1000000;
/**
* 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.
*/
static private final int SAMPLE_X = 0;
/*
* Offset for the sample's Y coordinate.
*/
static private final int SAMPLE_Y = 1;
/*
* Offset for the sample's pressure.
*/
static private final int SAMPLE_PRESSURE = 2;
/*
* Offset for the sample's size
*/
static private final int SAMPLE_SIZE = 3;
/*
* Offset for the sample's touch major axis length.
*/
static private final int SAMPLE_TOUCH_MAJOR = 4;
/*
* Offset for the sample's touch minor axis length.
*/
static private final int SAMPLE_TOUCH_MINOR = 5;
/*
* Offset for the sample's tool major axis length.
*/
static private final int SAMPLE_TOOL_MAJOR = 6;
/*
* Offset for the sample's tool minor axis length.
*/
static private final int SAMPLE_TOOL_MINOR = 7;
/*
* Offset for the sample's orientation.
*/
static private final int SAMPLE_ORIENTATION = 8;
/*
* Number of data items for each sample.
*/
static private final int NUM_SAMPLE_DATA = 9;
/*
* Minimum number of pointers for which to reserve space when allocating new
* motion events. This is explicitly not a bound on the maximum number of pointers.
*/
static private final int BASE_AVAIL_POINTERS = 5;
/*
* Minimum number of samples for which to reserve space when allocating new motion events.
*/
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 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 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 pointerIds An array of <em>pointers</em> values providing
* an identifier for each pointer.
* @param pointerCoords An array of <em>pointers</em> values providing
* a {@link PointerCoords} coordinate object for each pointer.
* @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.
* @param source The source of this event.
*/
static public MotionEvent obtain(long downTime, long eventTime,
int action, int pointers, int[] pointerIds, PointerCoords[] pointerCoords,
int metaState, float xPrecision, float yPrecision, int deviceId,
int edgeFlags, int source) {
MotionEvent ev = obtain(pointers, 1);
ev.mDeviceId = deviceId;
ev.mSource = source;
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(pointerIds, 0, ev.mPointerIdentifiers, 0, pointers);
ev.mEventTimeNanoSamples[0] = eventTime * MS_PER_NS;
ev.setPointerCoordsAtSampleIndex(0, pointerCoords);
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.mSource = InputDevice.SOURCE_UNKNOWN;
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;
ev.setPointerCoordsAtSampleIndex(0, x, y, pressure, 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.mSource = o.mSource;
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.mSource = o.mSource;
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?
history[i + SAMPLE_TOUCH_MAJOR] *= scale;
history[i + SAMPLE_TOUCH_MINOR] *= scale;
history[i + SAMPLE_TOOL_MAJOR] *= scale;
history[i + SAMPLE_TOOL_MINOR] *= scale;
}
}
/**
* 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];
}
/**
* {@link #getTouchMajor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getTouchMajor() {
return mDataSamples[mLastDataSampleIndex + SAMPLE_TOUCH_MAJOR];
}
/**
* {@link #getTouchMinor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getTouchMinor() {
return mDataSamples[mLastDataSampleIndex + SAMPLE_TOUCH_MINOR];
}
/**
* {@link #getToolMajor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getToolMajor() {
return mDataSamples[mLastDataSampleIndex + SAMPLE_TOOL_MAJOR];
}
/**
* {@link #getToolMinor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getToolMinor() {
return mDataSamples[mLastDataSampleIndex + SAMPLE_TOOL_MINOR];
}
/**
* {@link #getOrientation(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getOrientation() {
return mDataSamples[mLastDataSampleIndex + SAMPLE_ORIENTATION];
}
/**
* 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 length of the major axis of an ellipse that describes the touch
* area at the point of contact for the given pointer
* <em>index</em> (use {@link #getPointerId(int)} to find the pointer
* identifier for this index).
* @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 getTouchMajor(int pointerIndex) {
return mDataSamples[mLastDataSampleIndex
+ pointerIndex * NUM_SAMPLE_DATA + SAMPLE_TOUCH_MAJOR];
}
/**
* Returns the length of the minor axis of an ellipse that describes the touch
* area at the point of contact for the given pointer
* <em>index</em> (use {@link #getPointerId(int)} to find the pointer
* identifier for this index).
* @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 getTouchMinor(int pointerIndex) {
return mDataSamples[mLastDataSampleIndex
+ pointerIndex * NUM_SAMPLE_DATA + SAMPLE_TOUCH_MINOR];
}
/**
* Returns the length of the major axis of an ellipse that describes the size of
* the approaching tool for the given pointer
* <em>index</em> (use {@link #getPointerId(int)} to find the pointer
* identifier for this index).
* The tool area represents the estimated size of the finger or pen that is
* touching the device independent of its actual touch area at the point of contact.
* @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 getToolMajor(int pointerIndex) {
return mDataSamples[mLastDataSampleIndex
+ pointerIndex * NUM_SAMPLE_DATA + SAMPLE_TOOL_MAJOR];
}
/**
* Returns the length of the minor axis of an ellipse that describes the size of
* the approaching tool for the given pointer
* <em>index</em> (use {@link #getPointerId(int)} to find the pointer
* identifier for this index).
* The tool area represents the estimated size of the finger or pen that is
* touching the device independent of its actual touch area at the point of contact.
* @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 getToolMinor(int pointerIndex) {
return mDataSamples[mLastDataSampleIndex
+ pointerIndex * NUM_SAMPLE_DATA + SAMPLE_TOOL_MINOR];
}
/**
* Returns the orientation of the touch area and tool area in radians clockwise from vertical
* for the given pointer <em>index</em> (use {@link #getPointerId(int)} to find the pointer
* identifier for this index).
* An angle of 0 degrees indicates that the major axis of contact is oriented
* upwards, is perfectly circular or is of unknown orientation. A positive angle
* indicates that the major axis of contact is oriented to the right. A negative angle
* indicates that the major axis of contact is oriented to the left.
* The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
* (finger pointing fully right).
* @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 getOrientation(int pointerIndex) {
return mDataSamples[mLastDataSampleIndex
+ pointerIndex * NUM_SAMPLE_DATA + SAMPLE_ORIENTATION];
}
/**
* Populates a {@link PointerCoords} object with pointer coordinate data for
* the specified pointer index.
*
* @param pointerIndex Raw index of pointer to retrieve. Value may be from 0
* (the first pointer that is down) to {@link #getPointerCount()}-1.
* @param outPointerCoords The pointer coordinate object to populate.
*/
public final void getPointerCoords(int pointerIndex, PointerCoords outPointerCoords) {
final int sampleIndex = mLastDataSampleIndex + pointerIndex * NUM_SAMPLE_DATA;
getPointerCoordsAtSampleIndex(sampleIndex, outPointerCoords);
}
/**
* 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];
}
/**
* {@link #getHistoricalTouchMajor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalTouchMajor(int pos) {
return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_TOUCH_MAJOR];
}
/**
* {@link #getHistoricalTouchMinor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalTouchMinor(int pos) {
return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_TOUCH_MINOR];
}
/**
* {@link #getHistoricalToolMajor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalToolMajor(int pos) {
return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_TOOL_MAJOR];
}
/**
* {@link #getHistoricalToolMinor(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalToolMinor(int pos) {
return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_TOOL_MINOR];
}
/**
* {@link #getHistoricalOrientation(int)} for the first pointer index (may be an
* arbitrary pointer identifier).
*/
public final float getHistoricalOrientation(int pos) {
return mDataSamples[pos * mNumPointers * NUM_SAMPLE_DATA + SAMPLE_ORIENTATION];
}
/**
* 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];
}
/**
* Returns a historical touch major axis coordinate, as per {@link #getTouchMajor(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 #getTouchMajor
*/
public final float getHistoricalTouchMajor(int pointerIndex, int pos) {
return mDataSamples[(pos * mNumPointers + pointerIndex)
* NUM_SAMPLE_DATA + SAMPLE_TOUCH_MAJOR];
}
/**
* Returns a historical touch minor axis coordinate, as per {@link #getTouchMinor(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 #getTouchMinor
*/
public final float getHistoricalTouchMinor(int pointerIndex, int pos) {
return mDataSamples[(pos * mNumPointers + pointerIndex)
* NUM_SAMPLE_DATA + SAMPLE_TOUCH_MINOR];
}
/**
* Returns a historical tool major axis coordinate, as per {@link #getToolMajor(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 #getToolMajor
*/
public final float getHistoricalToolMajor(int pointerIndex, int pos) {
return mDataSamples[(pos * mNumPointers + pointerIndex)
* NUM_SAMPLE_DATA + SAMPLE_TOOL_MAJOR];
}
/**
* Returns a historical tool minor axis coordinate, as per {@link #getToolMinor(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 #getToolMinor
*/
public final float getHistoricalToolMinor(int pointerIndex, int pos) {
return mDataSamples[(pos * mNumPointers + pointerIndex)
* NUM_SAMPLE_DATA + SAMPLE_TOOL_MINOR];
}
/**
* Returns a historical orientation coordinate, as per {@link #getOrientation(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 #getOrientation
*/
public final float getHistoricalOrientation(int pointerIndex, int pos) {
return mDataSamples[(pos * mNumPointers + pointerIndex)
* NUM_SAMPLE_DATA + SAMPLE_ORIENTATION];
}
/**
* Populates a {@link PointerCoords} object with historical pointer coordinate data,
* as per {@link #getPointerCoords}, 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}
* @param outPointerCoords The pointer coordinate object to populate.
*
* @see #getHistorySize
* @see #getPointerCoords
*/
public final void getHistoricalPointerCoords(int pointerIndex, int pos,
PointerCoords outPointerCoords) {
final int sampleIndex = (pos * mNumPointers + pointerIndex) * NUM_SAMPLE_DATA;
getPointerCoordsAtSampleIndex(sampleIndex, outPointerCoords);
}
/**
* 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 getPointerCoordsAtSampleIndex(int sampleIndex,
PointerCoords outPointerCoords) {
outPointerCoords.x = mDataSamples[sampleIndex + SAMPLE_X] + mXOffset;
outPointerCoords.y = mDataSamples[sampleIndex + SAMPLE_Y] + mYOffset;
outPointerCoords.pressure = mDataSamples[sampleIndex + SAMPLE_PRESSURE];
outPointerCoords.size = mDataSamples[sampleIndex + SAMPLE_SIZE];
outPointerCoords.touchMajor = mDataSamples[sampleIndex + SAMPLE_TOUCH_MAJOR];
outPointerCoords.touchMinor = mDataSamples[sampleIndex + SAMPLE_TOUCH_MINOR];
outPointerCoords.toolMajor = mDataSamples[sampleIndex + SAMPLE_TOOL_MAJOR];
outPointerCoords.toolMinor = mDataSamples[sampleIndex + SAMPLE_TOOL_MINOR];
outPointerCoords.orientation = mDataSamples[sampleIndex + SAMPLE_ORIENTATION];
}
private final void setPointerCoordsAtSampleIndex(int sampleIndex,
PointerCoords[] pointerCoords) {
final int numPointers = mNumPointers;
for (int i = 0; i < numPointers; i++) {
setPointerCoordsAtSampleIndex(sampleIndex, pointerCoords[i]);
sampleIndex += NUM_SAMPLE_DATA;
}
}
private final void setPointerCoordsAtSampleIndex(int sampleIndex,
PointerCoords pointerCoords) {
mDataSamples[sampleIndex + SAMPLE_X] = pointerCoords.x - mXOffset;
mDataSamples[sampleIndex + SAMPLE_Y] = pointerCoords.y - mYOffset;
mDataSamples[sampleIndex + SAMPLE_PRESSURE] = pointerCoords.pressure;
mDataSamples[sampleIndex + SAMPLE_SIZE] = pointerCoords.size;
mDataSamples[sampleIndex + SAMPLE_TOUCH_MAJOR] = pointerCoords.touchMajor;
mDataSamples[sampleIndex + SAMPLE_TOUCH_MINOR] = pointerCoords.touchMinor;
mDataSamples[sampleIndex + SAMPLE_TOOL_MAJOR] = pointerCoords.toolMajor;
mDataSamples[sampleIndex + SAMPLE_TOOL_MINOR] = pointerCoords.toolMinor;
mDataSamples[sampleIndex + SAMPLE_ORIENTATION] = pointerCoords.orientation;
}
private final void setPointerCoordsAtSampleIndex(int sampleIndex,
float x, float y, float pressure, float size) {
mDataSamples[sampleIndex + SAMPLE_X] = x - mXOffset;
mDataSamples[sampleIndex + SAMPLE_Y] = y - mYOffset;
mDataSamples[sampleIndex + SAMPLE_PRESSURE] = pressure;
mDataSamples[sampleIndex + SAMPLE_SIZE] = size;
mDataSamples[sampleIndex + SAMPLE_TOUCH_MAJOR] = pressure;
mDataSamples[sampleIndex + SAMPLE_TOUCH_MINOR] = pressure;
mDataSamples[sampleIndex + SAMPLE_TOOL_MAJOR] = size;
mDataSamples[sampleIndex + SAMPLE_TOOL_MINOR] = size;
mDataSamples[sampleIndex + SAMPLE_ORIENTATION] = 0;
}
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.
* The current values in the event are added to a list of historical values.
*
* Only applies to {@link #ACTION_MOVE} events.
*
* @param eventTime The time stamp (in ms) 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;
setPointerCoordsAtSampleIndex(mLastDataSampleIndex, x, y, pressure, size);
mMetaState |= metaState;
}
/**
* 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.
* The current values in the event are added to a list of historical values.
*
* Only applies to {@link #ACTION_MOVE} events.
*
* @param eventTime The time stamp (in ms) for this data.
* @param pointerCoords The new pointer coordinates.
* @param metaState Meta key state.
*/
public final void addBatch(long eventTime, PointerCoords[] pointerCoords, int metaState) {
final int dataSampleStride = mNumPointers * NUM_SAMPLE_DATA;
incrementNumSamplesAndReserveStorage(dataSampleStride);
mEventTimeNanoSamples[mLastEventTimeNanoSampleIndex] = eventTime * MS_PER_NS;
setPointerCoordsAtSampleIndex(mLastDataSampleIndex, pointerCoords);
mMetaState |= metaState;
}
@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) {
in.readInt(); // skip token, we already know this is a MotionEvent
return MotionEvent.createFromParcelBody(in);
}
public MotionEvent[] newArray(int size) {
return new MotionEvent[size];
}
};
/** @hide */
public static MotionEvent createFromParcelBody(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.readBaseFromParcel(in);
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.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 void writeToParcel(Parcel out, int flags) {
out.writeInt(PARCEL_TOKEN_MOTION_EVENT);
final int NP = mNumPointers;
final int NS = mNumSamples;
final int NI = NP * NS * NUM_SAMPLE_DATA;
out.writeInt(NP);
out.writeInt(NS);
writeBaseToParcel(out);
out.writeLong(mDownTimeNano);
out.writeInt(mAction);
out.writeFloat(mXOffset);
out.writeFloat(mYOffset);
out.writeFloat(mXPrecision);
out.writeFloat(mYPrecision);
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]);
}
}
/**
* Transfer object for pointer coordinates.
*
* Objects of this type can be used to manufacture new {@link MotionEvent} objects
* and to query pointer coordinate information in bulk.
*
* Refer to {@link InputDevice} for information about how different kinds of
* input devices and sources represent pointer coordinates.
*/
public static final class PointerCoords {
/**
* The X coordinate of the pointer movement.
* The interpretation varies by input source and may represent the position of
* the center of the contact area, a relative displacement in device-specific units
* or something else.
*/
public float x;
/**
* The Y coordinate of the pointer movement.
* The interpretation varies by input source and may represent the position of
* the center of the contact area, a relative displacement in device-specific units
* or something else.
*/
public float y;
/**
* A scaled value that describes the pressure applied to the pointer.
* 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.
*/
public float pressure;
/**
* A scaled value of the approximate size of the pointer touch area.
* 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.
*/
public float size;
/**
* The length of the major axis of an ellipse that describes the touch area at
* the point of contact.
*/
public float touchMajor;
/**
* The length of the minor axis of an ellipse that describes the touch area at
* the point of contact.
*/
public float touchMinor;
/**
* The length of the major axis of an ellipse that describes the size of
* the approaching tool.
* The tool area represents the estimated size of the finger or pen that is
* touching the device independent of its actual touch area at the point of contact.
*/
public float toolMajor;
/**
* The length of the minor axis of an ellipse that describes the size of
* the approaching tool.
* The tool area represents the estimated size of the finger or pen that is
* touching the device independent of its actual touch area at the point of contact.
*/
public float toolMinor;
/**
* The orientation of the touch area and tool area in radians clockwise from vertical.
* An angle of 0 degrees indicates that the major axis of contact is oriented
* upwards, is perfectly circular or is of unknown orientation. A positive angle
* indicates that the major axis of contact is oriented to the right. A negative angle
* indicates that the major axis of contact is oriented to the left.
* The full range is from -PI/2 radians (finger pointing fully left) to PI/2 radians
* (finger pointing fully right).
*/
public float orientation;
/*
private static final float PI_4 = (float) (Math.PI / 4);
public float getTouchWidth() {
return Math.abs(orientation) > PI_4 ? touchMajor : touchMinor;
}
public float getTouchHeight() {
return Math.abs(orientation) > PI_4 ? touchMinor : touchMajor;
}
public float getToolWidth() {
return Math.abs(orientation) > PI_4 ? toolMajor : toolMinor;
}
public float getToolHeight() {
return Math.abs(orientation) > PI_4 ? toolMinor : toolMajor;
}
*/
}
}