e3dd884815
The kernel can now publish a property describing the layout of virtual hardware buttons on the touchscreen. These outside of the display area (outside of the absolute x and y controller range the driver reports), and when the user presses on them a key event will be generated rather than a touch event. This also includes a number of tweaks to the absolute controller processing to make things work better on the new screens. For example, we now reject down events outside of the display area. Still left to be done is the ability to cancel a key down event, so the user can slide up from the virtual keys to the touch screen without causing a virtual key to execute.
236 lines
8.6 KiB
Java
236 lines
8.6 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.util.Log;
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import android.view.Display;
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import android.view.MotionEvent;
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import android.view.Surface;
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import android.view.WindowManagerPolicy;
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public class InputDevice {
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/** Amount that trackball needs to move in order to generate a key event. */
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static final int TRACKBALL_MOVEMENT_THRESHOLD = 6;
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final int id;
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final int classes;
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final String name;
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final AbsoluteInfo absX;
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final AbsoluteInfo absY;
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final AbsoluteInfo absPressure;
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final AbsoluteInfo absSize;
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long mDownTime = 0;
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int mMetaKeysState = 0;
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final MotionState mAbs = new MotionState(0, 0);
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final MotionState mRel = new MotionState(TRACKBALL_MOVEMENT_THRESHOLD,
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TRACKBALL_MOVEMENT_THRESHOLD);
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static class MotionState {
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int xPrecision;
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int yPrecision;
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float xMoveScale;
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float yMoveScale;
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MotionEvent currentMove = null;
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boolean changed = false;
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boolean down = false;
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boolean lastDown = false;
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long downTime = 0;
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int x = 0;
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int y = 0;
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int pressure = 1;
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int size = 0;
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MotionState(int mx, int my) {
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xPrecision = mx;
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yPrecision = my;
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xMoveScale = mx != 0 ? (1.0f/mx) : 1.0f;
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yMoveScale = my != 0 ? (1.0f/my) : 1.0f;
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}
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MotionEvent generateMotion(InputDevice device, long curTime, long curTimeNano,
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boolean isAbs, Display display, int orientation,
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int metaState) {
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float scaledX = x;
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float scaledY = y;
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float temp;
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float scaledPressure = 1.0f;
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float scaledSize = 0;
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int edgeFlags = 0;
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int action;
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if (down != lastDown) {
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if (isAbs) {
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final AbsoluteInfo absX = device.absX;
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final AbsoluteInfo absY = device.absY;
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if (down && absX != null && absY != null) {
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// We don't let downs start unless we are
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// inside of the screen. There are two reasons for
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// this: to avoid spurious touches when holding
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// the edges of the device near the touchscreen,
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// and to avoid reporting events if there are virtual
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// keys on the touchscreen outside of the display
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// area.
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if (scaledX < absX.minValue || scaledX > absX.maxValue
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|| scaledY < absY.minValue || scaledY > absY.maxValue) {
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if (false) Log.v("InputDevice", "Rejecting (" + scaledX + ","
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+ scaledY + "): outside of ("
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+ absX.minValue + "," + absY.minValue
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+ ")-(" + absX.maxValue + ","
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+ absY.maxValue + ")");
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return null;
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}
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}
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} else {
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x = y = 0;
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}
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lastDown = down;
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if (down) {
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action = MotionEvent.ACTION_DOWN;
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downTime = curTime;
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} else {
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action = MotionEvent.ACTION_UP;
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}
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currentMove = null;
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} else {
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action = MotionEvent.ACTION_MOVE;
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}
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if (isAbs) {
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final int dispW = display.getWidth()-1;
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final int dispH = display.getHeight()-1;
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int w = dispW;
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int h = dispH;
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if (orientation == Surface.ROTATION_90
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|| orientation == Surface.ROTATION_270) {
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int tmp = w;
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w = h;
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h = tmp;
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}
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if (device.absX != null) {
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scaledX = ((scaledX-device.absX.minValue)
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/ device.absX.range) * w;
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}
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if (device.absY != null) {
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scaledY = ((scaledY-device.absY.minValue)
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/ device.absY.range) * h;
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}
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if (device.absPressure != null) {
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scaledPressure =
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((pressure-device.absPressure.minValue)
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/ (float)device.absPressure.range);
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}
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if (device.absSize != null) {
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scaledSize =
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((size-device.absSize.minValue)
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/ (float)device.absSize.range);
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}
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switch (orientation) {
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case Surface.ROTATION_90:
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temp = scaledX;
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scaledX = scaledY;
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scaledY = w-temp;
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break;
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case Surface.ROTATION_180:
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scaledX = w-scaledX;
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scaledY = h-scaledY;
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break;
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case Surface.ROTATION_270:
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temp = scaledX;
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scaledX = h-scaledY;
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scaledY = temp;
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break;
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}
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if (action != MotionEvent.ACTION_DOWN) {
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if (scaledX <= 0) {
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edgeFlags += MotionEvent.EDGE_LEFT;
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} else if (scaledX >= dispW) {
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edgeFlags += MotionEvent.EDGE_RIGHT;
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}
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if (scaledY <= 0) {
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edgeFlags += MotionEvent.EDGE_TOP;
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} else if (scaledY >= dispH) {
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edgeFlags += MotionEvent.EDGE_BOTTOM;
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}
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}
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} else {
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scaledX *= xMoveScale;
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scaledY *= yMoveScale;
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switch (orientation) {
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case Surface.ROTATION_90:
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temp = scaledX;
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scaledX = scaledY;
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scaledY = -temp;
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break;
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case Surface.ROTATION_180:
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scaledX = -scaledX;
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scaledY = -scaledY;
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break;
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case Surface.ROTATION_270:
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temp = scaledX;
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scaledX = -scaledY;
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scaledY = temp;
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break;
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}
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}
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if (currentMove != null) {
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if (false) Log.i("InputDevice", "Adding batch x=" + scaledX
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+ " y=" + scaledY + " to " + currentMove);
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currentMove.addBatch(curTime, scaledX, scaledY,
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scaledPressure, scaledSize, metaState);
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if (WindowManagerPolicy.WATCH_POINTER) {
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Log.i("KeyInputQueue", "Updating: " + currentMove);
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}
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return null;
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}
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MotionEvent me = MotionEvent.obtainNano(downTime, curTime,
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curTimeNano, action, scaledX, scaledY,
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scaledPressure, scaledSize, metaState,
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xPrecision, yPrecision, device.id, edgeFlags);
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if (action == MotionEvent.ACTION_MOVE) {
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currentMove = me;
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}
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return me;
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}
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}
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static class AbsoluteInfo {
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int minValue;
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int maxValue;
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int range;
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int flat;
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int fuzz;
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};
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InputDevice(int _id, int _classes, String _name,
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AbsoluteInfo _absX, AbsoluteInfo _absY,
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AbsoluteInfo _absPressure, AbsoluteInfo _absSize) {
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id = _id;
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classes = _classes;
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name = _name;
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absX = _absX;
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absY = _absY;
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absPressure = _absPressure;
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absSize = _absSize;
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}
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};
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