mirror of https://github.com/NekoX-Dev/NekoX.git
551 lines
21 KiB
Java
551 lines
21 KiB
Java
/*
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* Copyright (C) 2008 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 org.telegram.ui.Components;
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import android.content.Context;
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import android.os.Build;
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import android.os.Handler;
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import android.os.Message;
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import android.view.MotionEvent;
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import android.view.VelocityTracker;
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import android.view.ViewConfiguration;
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public class GestureDetector2 {
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public interface OnGestureListener {
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boolean onDown(MotionEvent e);
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void onUp(MotionEvent e);
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void onShowPress(MotionEvent e);
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boolean onSingleTapUp(MotionEvent e);
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boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY);
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void onLongPress(MotionEvent e);
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boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY);
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}
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/**
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* The listener that is used to notify when a double-tap or a confirmed
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* single-tap occur.
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*/
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public interface OnDoubleTapListener {
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/**
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* Notified when a single-tap occurs.
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* <p>
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* Unlike {@link OnGestureListener#onSingleTapUp(MotionEvent)}, this
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* will only be called after the detector is confident that the user's
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* first tap is not followed by a second tap leading to a double-tap
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* gesture.
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*
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* @param e The down motion event of the single-tap.
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* @return true if the event is consumed, else false
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*/
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boolean onSingleTapConfirmed(MotionEvent e);
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/**
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* Notified when a double-tap occurs.
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*
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* @param e The down motion event of the first tap of the double-tap.
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* @return true if the event is consumed, else false
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*/
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boolean onDoubleTap(MotionEvent e);
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/**
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* Notified when an event within a double-tap gesture occurs, including
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* the down, move, and up events.
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*
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* @param e The motion event that occurred during the double-tap gesture.
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* @return true if the event is consumed, else false
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*/
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boolean onDoubleTapEvent(MotionEvent e);
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}
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public interface OnContextClickListener {
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/**
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* Notified when a context click occurs.
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*
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* @param e The motion event that occurred during the context click.
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* @return true if the event is consumed, else false
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*/
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boolean onContextClick(MotionEvent e);
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}
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/**
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* A convenience class to extend when you only want to listen for a subset
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* of all the gestures. This implements all methods in the
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* {@link OnGestureListener}, {@link OnDoubleTapListener}, and {@link OnContextClickListener}
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* but does nothing and return {@code false} for all applicable methods.
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*/
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public static class SimpleOnGestureListener implements OnGestureListener, OnDoubleTapListener,
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OnContextClickListener {
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public boolean onSingleTapUp(MotionEvent e) {
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return false;
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}
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public void onLongPress(MotionEvent e) {
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}
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public boolean onScroll(MotionEvent e1, MotionEvent e2,
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float distanceX, float distanceY) {
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return false;
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}
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public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
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float velocityY) {
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return false;
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}
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public void onShowPress(MotionEvent e) {
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}
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public boolean onDown(MotionEvent e) {
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return false;
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}
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public void onUp(MotionEvent e) {
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}
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public boolean onDoubleTap(MotionEvent e) {
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return false;
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}
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public boolean onDoubleTapEvent(MotionEvent e) {
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return false;
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}
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public boolean onSingleTapConfirmed(MotionEvent e) {
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return false;
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}
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public boolean onContextClick(MotionEvent e) {
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return false;
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}
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}
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private int mTouchSlopSquare;
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private int mDoubleTapTouchSlopSquare;
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private int mDoubleTapSlopSquare;
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private int mMinimumFlingVelocity;
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private int mMaximumFlingVelocity;
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private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout();
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private static final int TAP_TIMEOUT = ViewConfiguration.getTapTimeout();
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private static final int DOUBLE_TAP_TIMEOUT = 150;
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private static final int DOUBLE_TAP_MIN_TIME = 40;
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private static final int SHOW_PRESS = 1;
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private static final int LONG_PRESS = 2;
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private static final int TAP = 3;
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private final Handler mHandler;
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private final OnGestureListener mListener;
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private OnDoubleTapListener mDoubleTapListener;
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private boolean mStillDown;
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private boolean mDeferConfirmSingleTap;
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private boolean mInLongPress;
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private boolean mInContextClick;
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private boolean mAlwaysInTapRegion;
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private boolean mAlwaysInBiggerTapRegion;
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private boolean mIgnoreNextUpEvent;
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private MotionEvent mCurrentDownEvent;
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private MotionEvent mCurrentMotionEvent;
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private MotionEvent mPreviousUpEvent;
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private boolean mIsDoubleTapping;
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private float mLastFocusX;
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private float mLastFocusY;
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private float mDownFocusX;
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private float mDownFocusY;
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private boolean mIsLongpressEnabled;
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private VelocityTracker mVelocityTracker;
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private class GestureHandler extends Handler {
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GestureHandler() {
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super();
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}
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GestureHandler(Handler handler) {
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super(handler.getLooper());
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}
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case SHOW_PRESS:
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mListener.onShowPress(mCurrentDownEvent);
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break;
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case LONG_PRESS:
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dispatchLongPress();
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break;
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case TAP:
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if (mDoubleTapListener != null) {
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if (!mStillDown) {
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mDoubleTapListener.onSingleTapConfirmed(mCurrentDownEvent);
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} else {
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mDeferConfirmSingleTap = true;
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}
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}
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break;
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default:
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throw new RuntimeException("Unknown message " + msg); //never
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}
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}
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}
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@Deprecated
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public GestureDetector2(OnGestureListener listener, Handler handler) {
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this(null, listener, handler);
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}
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@Deprecated
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public GestureDetector2(OnGestureListener listener) {
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this(null, listener, null);
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}
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public GestureDetector2(Context context, OnGestureListener listener) {
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this(context, listener, null);
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}
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public GestureDetector2(Context context, OnGestureListener listener, Handler handler) {
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if (handler != null) {
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mHandler = new GestureHandler(handler);
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} else {
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mHandler = new GestureHandler();
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}
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mListener = listener;
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if (listener instanceof OnDoubleTapListener) {
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setOnDoubleTapListener((OnDoubleTapListener) listener);
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}
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init(context);
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}
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public GestureDetector2(Context context, OnGestureListener listener, Handler handler, boolean unused) {
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this(context, listener, handler);
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}
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private void init(Context context) {
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if (mListener == null) {
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throw new NullPointerException("OnGestureListener must not be null");
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}
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mIsLongpressEnabled = true;
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int touchSlop, doubleTapSlop, doubleTapTouchSlop;
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if (context == null) {
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touchSlop = ViewConfiguration.getTouchSlop();
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doubleTapTouchSlop = touchSlop;
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doubleTapSlop = 100;
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mMinimumFlingVelocity = ViewConfiguration.getMinimumFlingVelocity();
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mMaximumFlingVelocity = ViewConfiguration.getMaximumFlingVelocity();
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} else {
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final ViewConfiguration configuration = ViewConfiguration.get(context);
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touchSlop = configuration.getScaledTouchSlop();
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doubleTapTouchSlop = configuration.getScaledTouchSlop();
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doubleTapSlop = configuration.getScaledDoubleTapSlop();
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mMinimumFlingVelocity = configuration.getScaledMinimumFlingVelocity();
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mMaximumFlingVelocity = configuration.getScaledMaximumFlingVelocity();
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}
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mTouchSlopSquare = touchSlop * touchSlop;
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mDoubleTapTouchSlopSquare = doubleTapTouchSlop * doubleTapTouchSlop;
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mDoubleTapSlopSquare = doubleTapSlop * doubleTapSlop;
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}
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public void setOnDoubleTapListener(OnDoubleTapListener onDoubleTapListener) {
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mDoubleTapListener = onDoubleTapListener;
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}
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public void setIsLongpressEnabled(boolean isLongpressEnabled) {
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mIsLongpressEnabled = isLongpressEnabled;
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}
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public boolean isLongpressEnabled() {
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return mIsLongpressEnabled;
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}
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public boolean onTouchEvent(MotionEvent ev) {
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final int action = ev.getAction();
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if (mCurrentMotionEvent != null) {
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mCurrentMotionEvent.recycle();
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}
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mCurrentMotionEvent = MotionEvent.obtain(ev);
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if (mVelocityTracker == null) {
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mVelocityTracker = VelocityTracker.obtain();
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}
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mVelocityTracker.addMovement(ev);
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final boolean pointerUp = (action & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_POINTER_UP;
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final int skipIndex = pointerUp ? ev.getActionIndex() : -1;
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// Determine focal point
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float sumX = 0, sumY = 0;
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final int count = ev.getPointerCount();
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for (int i = 0; i < count; i++) {
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if (skipIndex == i) continue;
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sumX += ev.getX(i);
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sumY += ev.getY(i);
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}
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final int div = pointerUp ? count - 1 : count;
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final float focusX = sumX / div;
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final float focusY = sumY / div;
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boolean handled = false;
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switch (action & MotionEvent.ACTION_MASK) {
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case MotionEvent.ACTION_POINTER_DOWN:
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mDownFocusX = mLastFocusX = focusX;
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mDownFocusY = mLastFocusY = focusY;
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// Cancel long press and taps
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cancelTaps();
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break;
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case MotionEvent.ACTION_POINTER_UP:
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mDownFocusX = mLastFocusX = focusX;
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mDownFocusY = mLastFocusY = focusY;
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// Check the dot product of current velocities.
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// If the pointer that left was opposing another velocity vector, clear.
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mVelocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
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final int upIndex = ev.getActionIndex();
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final int id1 = ev.getPointerId(upIndex);
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final float x1 = mVelocityTracker.getXVelocity(id1);
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final float y1 = mVelocityTracker.getYVelocity(id1);
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for (int i = 0; i < count; i++) {
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if (i == upIndex) continue;
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final int id2 = ev.getPointerId(i);
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final float x = x1 * mVelocityTracker.getXVelocity(id2);
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final float y = y1 * mVelocityTracker.getYVelocity(id2);
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final float dot = x + y;
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if (dot < 0) {
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mVelocityTracker.clear();
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break;
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}
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}
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break;
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case MotionEvent.ACTION_DOWN:
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if (mDoubleTapListener != null) {
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boolean hadTapMessage = mHandler.hasMessages(TAP);
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if (hadTapMessage) mHandler.removeMessages(TAP);
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if ((mCurrentDownEvent != null) && (mPreviousUpEvent != null)
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&& hadTapMessage
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&& isConsideredDoubleTap(mCurrentDownEvent, mPreviousUpEvent, ev)) {
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// This is a second tap
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mIsDoubleTapping = true;
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// Give a callback with the first tap of the double-tap
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handled |= mDoubleTapListener.onDoubleTap(mCurrentDownEvent);
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// Give a callback with down event of the double-tap
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handled |= mDoubleTapListener.onDoubleTapEvent(ev);
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} else {
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// This is a first tap
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mHandler.sendEmptyMessageDelayed(TAP, DOUBLE_TAP_TIMEOUT);
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}
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}
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mDownFocusX = mLastFocusX = focusX;
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mDownFocusY = mLastFocusY = focusY;
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if (mCurrentDownEvent != null) {
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mCurrentDownEvent.recycle();
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}
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mCurrentDownEvent = MotionEvent.obtain(ev);
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mAlwaysInTapRegion = true;
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mAlwaysInBiggerTapRegion = true;
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mStillDown = true;
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mInLongPress = false;
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mDeferConfirmSingleTap = false;
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if (mIsLongpressEnabled) {
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mHandler.removeMessages(LONG_PRESS);
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mHandler.sendMessageAtTime(
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mHandler.obtainMessage(LONG_PRESS, 0, 0), mCurrentDownEvent.getDownTime()
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+ ViewConfiguration.getLongPressTimeout());
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}
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mHandler.sendEmptyMessageAtTime(SHOW_PRESS,
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mCurrentDownEvent.getDownTime() + TAP_TIMEOUT);
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handled |= mListener.onDown(ev);
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break;
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case MotionEvent.ACTION_MOVE:
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if (mInLongPress || mInContextClick) {
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break;
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}
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final int motionClassification = Build.VERSION.SDK_INT >= 29 ? ev.getClassification() : 0;
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final boolean hasPendingLongPress = mHandler.hasMessages(LONG_PRESS);
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final float scrollX = mLastFocusX - focusX;
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final float scrollY = mLastFocusY - focusY;
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if (mIsDoubleTapping) {
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handled |= mDoubleTapListener.onDoubleTapEvent(ev);
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} else if (mAlwaysInTapRegion) {
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final int deltaX = (int) (focusX - mDownFocusX);
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final int deltaY = (int) (focusY - mDownFocusY);
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int distance = (deltaX * deltaX) + (deltaY * deltaY);
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int slopSquare = mTouchSlopSquare;
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final boolean ambiguousGesture = Build.VERSION.SDK_INT >= 29 && motionClassification == MotionEvent.CLASSIFICATION_AMBIGUOUS_GESTURE;
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final boolean shouldInhibitDefaultAction = hasPendingLongPress && ambiguousGesture;
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if (shouldInhibitDefaultAction) {
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final float multiplier = 2f;
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if (distance > slopSquare) {
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mHandler.removeMessages(LONG_PRESS);
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final long longPressTimeout = ViewConfiguration.getLongPressTimeout();
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mHandler.sendMessageAtTime(mHandler.obtainMessage(LONG_PRESS, 0, 0), ev.getDownTime() + (long) (longPressTimeout * multiplier));
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}
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slopSquare *= multiplier * multiplier;
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}
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if (distance > slopSquare) {
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handled = mListener.onScroll(mCurrentDownEvent, ev, scrollX, scrollY);
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mLastFocusX = focusX;
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mLastFocusY = focusY;
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mAlwaysInTapRegion = false;
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mHandler.removeMessages(TAP);
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mHandler.removeMessages(SHOW_PRESS);
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mHandler.removeMessages(LONG_PRESS);
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}
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int doubleTapSlopSquare = mDoubleTapTouchSlopSquare;
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if (distance > doubleTapSlopSquare) {
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mAlwaysInBiggerTapRegion = false;
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}
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} else if ((Math.abs(scrollX) >= 1) || (Math.abs(scrollY) >= 1)) {
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handled = mListener.onScroll(mCurrentDownEvent, ev, scrollX, scrollY);
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mLastFocusX = focusX;
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mLastFocusY = focusY;
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}
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if (Build.VERSION.SDK_INT >= 29) {
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final boolean deepPress = motionClassification == MotionEvent.CLASSIFICATION_DEEP_PRESS;
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if (deepPress && hasPendingLongPress) {
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mHandler.removeMessages(LONG_PRESS);
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mHandler.sendMessage(mHandler.obtainMessage(LONG_PRESS, 0, 0));
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}
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}
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break;
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case MotionEvent.ACTION_UP:
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mStillDown = false;
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mListener.onUp(ev);
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MotionEvent currentUpEvent = MotionEvent.obtain(ev);
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if (mIsDoubleTapping) {
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handled |= mDoubleTapListener.onDoubleTapEvent(ev);
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} else if (mInLongPress) {
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mHandler.removeMessages(TAP);
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mInLongPress = false;
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} else if (mAlwaysInTapRegion && !mIgnoreNextUpEvent) {
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handled = mListener.onSingleTapUp(ev);
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if (mDeferConfirmSingleTap && mDoubleTapListener != null) {
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mDoubleTapListener.onSingleTapConfirmed(ev);
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}
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} else if (!mIgnoreNextUpEvent) {
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final VelocityTracker velocityTracker = mVelocityTracker;
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final int pointerId = ev.getPointerId(0);
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velocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
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final float velocityY = velocityTracker.getYVelocity(pointerId);
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final float velocityX = velocityTracker.getXVelocity(pointerId);
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if ((Math.abs(velocityY) > mMinimumFlingVelocity)
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|| (Math.abs(velocityX) > mMinimumFlingVelocity)) {
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handled = mListener.onFling(mCurrentDownEvent, ev, velocityX, velocityY);
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}
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}
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if (mPreviousUpEvent != null) {
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mPreviousUpEvent.recycle();
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}
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mPreviousUpEvent = currentUpEvent;
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if (mVelocityTracker != null) {
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mVelocityTracker.recycle();
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mVelocityTracker = null;
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}
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mIsDoubleTapping = false;
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mDeferConfirmSingleTap = false;
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mIgnoreNextUpEvent = false;
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mHandler.removeMessages(SHOW_PRESS);
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mHandler.removeMessages(LONG_PRESS);
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break;
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case MotionEvent.ACTION_CANCEL:
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cancel();
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break;
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}
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return handled;
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}
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private void cancel() {
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mHandler.removeMessages(SHOW_PRESS);
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mHandler.removeMessages(LONG_PRESS);
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mHandler.removeMessages(TAP);
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mVelocityTracker.recycle();
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mVelocityTracker = null;
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mIsDoubleTapping = false;
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mStillDown = false;
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mAlwaysInTapRegion = false;
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mAlwaysInBiggerTapRegion = false;
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mDeferConfirmSingleTap = false;
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mInLongPress = false;
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mInContextClick = false;
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mIgnoreNextUpEvent = false;
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}
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private void cancelTaps() {
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mHandler.removeMessages(SHOW_PRESS);
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mHandler.removeMessages(LONG_PRESS);
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mHandler.removeMessages(TAP);
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mIsDoubleTapping = false;
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mAlwaysInTapRegion = false;
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mAlwaysInBiggerTapRegion = false;
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mDeferConfirmSingleTap = false;
|
|
mInLongPress = false;
|
|
mInContextClick = false;
|
|
mIgnoreNextUpEvent = false;
|
|
}
|
|
|
|
private boolean isConsideredDoubleTap(MotionEvent firstDown, MotionEvent firstUp, MotionEvent secondDown) {
|
|
if (!mAlwaysInBiggerTapRegion) {
|
|
return false;
|
|
}
|
|
|
|
final long deltaTime = secondDown.getEventTime() - firstUp.getEventTime();
|
|
if (deltaTime > DOUBLE_TAP_TIMEOUT || deltaTime < DOUBLE_TAP_MIN_TIME) {
|
|
return false;
|
|
}
|
|
|
|
int deltaX = (int) firstDown.getX() - (int) secondDown.getX();
|
|
int deltaY = (int) firstDown.getY() - (int) secondDown.getY();
|
|
int slopSquare = mDoubleTapSlopSquare;
|
|
return (deltaX * deltaX + deltaY * deltaY < slopSquare);
|
|
}
|
|
|
|
private void dispatchLongPress() {
|
|
mHandler.removeMessages(TAP);
|
|
mDeferConfirmSingleTap = false;
|
|
mInLongPress = true;
|
|
mListener.onLongPress(mCurrentDownEvent);
|
|
}
|
|
}
|