com.dj.hacktor.nshiddenlayout.views.CustomNestedScrollView.java Source code

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Here is the source code for com.dj.hacktor.nshiddenlayout.views.CustomNestedScrollView.java

Source

package com.dj.hacktor.nshiddenlayout.views;

import android.content.Context;
import android.support.v4.widget.NestedScrollView;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;

/**
 * Copyright 2015-2016 Deepansh Jain
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.
 */
public class CustomNestedScrollView extends NestedScrollView {
    private int slop;
    private float xDistance, yDistance, lastX, lastY;

    public CustomNestedScrollView(Context context) {
        super(context);
        init(context);
    }

    public CustomNestedScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public CustomNestedScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(Context context) {
        ViewConfiguration config = ViewConfiguration.get(context);
        slop = config.getScaledEdgeSlop();
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            xDistance = yDistance = 0f;
            lastX = ev.getX();
            lastY = ev.getY();
            break;
        case MotionEvent.ACTION_MOVE:
            final float curX = ev.getX();
            final float curY = ev.getY();
            xDistance += Math.abs(curX - lastX);
            yDistance += Math.abs(curY - lastY);
            lastX = curX;
            lastY = curY;
            if (xDistance > yDistance)
                return false;
        }

        return super.onInterceptTouchEvent(ev) || ev.getPointerCount() == 2;
    }
}