com.community.yuequ.player.CommonGestures.java Source code

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Here is the source code for com.community.yuequ.player.CommonGestures.java

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/*
 * Copyright (C) 2012 YIXIA.COM
 *
 * 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 com.community.yuequ.player;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.support.v4.view.GestureDetectorCompat;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;

public class CommonGestures {
    public static final int SCALE_STATE_BEGIN = 0;
    public static final int SCALE_STATE_SCALEING = 1;
    public static final int SCALE_STATE_END = 2;

    private boolean mGestureEnabled;

    private GestureDetectorCompat mDoubleTapGestureDetector;
    private GestureDetectorCompat mTapGestureDetector;
    private ScaleGestureDetector mScaleDetector;
    private Activity mContext;
    private int flag = 0;
    private int width = 0;
    private int height = 0;

    public CommonGestures(Activity ctx) {
        mContext = ctx;
        mDoubleTapGestureDetector = new GestureDetectorCompat(mContext, new DoubleTapGestureListener());
        mTapGestureDetector = new GestureDetectorCompat(mContext, new TapGestureListener());
        mScaleDetector = new ScaleGestureDetector(mContext, new ScaleDetectorListener());
    }

    public void setWidthHeight(int w, int h) {
        width = w;
        height = h;
    }

    public boolean onTouchEvent(MotionEvent event) {
        if (mListener == null)
            return false;

        if (mTapGestureDetector.onTouchEvent(event))
            return true;

        if (event.getPointerCount() > 1) {
            try {
                if (mScaleDetector != null && mScaleDetector.onTouchEvent(event))
                    return true;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        if (mDoubleTapGestureDetector.onTouchEvent(event))
            return true;

        switch (event.getAction() & MotionEvent.ACTION_MASK) {
        case MotionEvent.ACTION_UP:
            mListener.onGestureEnd();
            break;
        }

        return false;
    }

    private class TapGestureListener extends SimpleOnGestureListener {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent event) {
            if (mListener != null)
                mListener.onSingleTap();
            return true;
        }

        @Override
        public void onLongPress(MotionEvent e) {
            if (mListener != null && mGestureEnabled)
                mListener.onLongPress();
        }
    }

    @SuppressLint("NewApi")
    private class ScaleDetectorListener implements ScaleGestureDetector.OnScaleGestureListener {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            if (mListener != null && mGestureEnabled)
                mListener.onScale(detector.getScaleFactor(), SCALE_STATE_SCALEING);
            return true;
        }

        @Override
        public void onScaleEnd(ScaleGestureDetector detector) {
            if (mListener != null && mGestureEnabled)
                mListener.onScale(0F, SCALE_STATE_END);
        }

        @Override
        public boolean onScaleBegin(ScaleGestureDetector detector) {
            if (mListener != null && mGestureEnabled)
                mListener.onScale(0F, SCALE_STATE_BEGIN);
            return true;
        }
    }

    private class DoubleTapGestureListener extends SimpleOnGestureListener {
        private boolean mDown = false;

        @Override
        public boolean onDown(MotionEvent event) {
            mDown = true;
            flag = 0;
            return super.onDown(event);
        }

        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            if (mListener != null && mGestureEnabled && e1 != null && e2 != null) {

                float mOldX = e1.getX(), mOldY = e1.getY();
                int windowWidth = width/*DeviceUtils.getScreenWidth(mContext)*/;
                int windowHeight = height/*DeviceUtils.getScreenHeight(mContext)*/;
                if (windowWidth == 0 || windowHeight == 0)
                    return super.onScroll(e1, e2, distanceX, distanceY);

                //            if (Math.abs(e2.getY(0) - mOldY)  > Math.abs(e2.getX(0) - mOldX) * 2) {

                if (Math.abs(e2.getY(0) - mOldY) > Math.abs(e2.getX(0) - mOldX) * 2
                        && mOldX > windowWidth * 5.0 / 6) {
                    if (flag == 0) {
                        flag = 1;
                    }
                    if (mDown && flag == 1) {
                        mListener.onGestureBegin();
                        mDown = false;
                    }

                    if (flag == 1) {
                        mListener.onRightSlide((mOldY - e2.getY(0)) / (windowHeight * 0.9f));
                    }

                } else if (Math.abs(e2.getY(0) - mOldY) > Math.abs(e2.getX(0) - mOldX) * 2
                        && mOldX < windowWidth / 6.0) {
                    if (flag == 0) {
                        flag = 2;
                    }
                    if (mDown && flag == 2) {
                        mListener.onGestureBegin();
                        mDown = false;
                    }
                    if (flag == 2) {
                        mListener.onLeftSlide((mOldY - e2.getY(0)) / (windowHeight * 0.9f));
                    }
                }

                //            }

                else if (Math.abs(e2.getX(0) - mOldX) > Math.abs(e2.getY(0) - mOldY) * 2) {
                    if (flag == 0) {
                        flag = 3;
                    }
                    if (mDown && flag == 3) {
                        mListener.onGestureBeginX();
                        mDown = false;
                    }
                    if (flag == 3) {
                        mListener.onSpeedX(distanceX);
                    }
                }
            }

            return super.onScroll(e1, e2, distanceX, distanceY);
        }

        @Override
        public boolean onDoubleTap(MotionEvent event) {
            if (mListener != null && mGestureEnabled)
                mListener.onDoubleTap();
            return super.onDoubleTap(event);
        }
    }

    public void setTouchListener(TouchListener l, boolean enable) {
        mListener = l;
        mGestureEnabled = enable;
    }

    private TouchListener mListener;

    public interface TouchListener {
        public void onGestureBegin();

        public void onGestureBeginX();

        public void onGestureEnd();

        //      public void onGestureEndX();
        public void onLeftSlide(float percent);

        public void onRightSlide(float percent);

        public void onSingleTap();

        public void onDoubleTap();

        public void onSpeedX(float distanceX);

        public void onScale(float scaleFactor, int state);

        public void onLongPress();
    }
}