/*
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* Copyright (C) 2016 huanghaibin_dev <huanghaibin_dev@163.com>
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* WebSite https://github.com/MiracleTimes-Dev
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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.haibin.oldcalendarview;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.ObjectAnimator;
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import android.animation.ValueAnimator;
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import android.animation.ValueAnimator.AnimatorUpdateListener;
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import android.annotation.SuppressLint;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.support.v7.widget.RecyclerView;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.VelocityTracker;
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import android.view.View;
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import android.view.ViewConfiguration;
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import android.view.ViewGroup;
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import android.widget.AbsListView;
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import android.widget.LinearLayout;
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/**
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* 日历布局
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*/
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public class CalendarLayout extends LinearLayout {
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WrapViewPager mViewPager;
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ViewGroup mContentView;
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private int mTouchSlop;
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private int mContentViewTranslateY; //ContentView 可滑动的最大距离距离 , 固定
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private int mViewPagerTranslateY = 0;// ViewPager可以平移的距离
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private float downY;
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private float mLastY;
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private boolean isAnimating = false;
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private int mContentViewId;
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private VelocityTracker mVelocityTracker;
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private int mMaximumVelocity;
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public CalendarLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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setOrientation(LinearLayout.VERTICAL);
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TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.CalendarLayout);
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mContentViewId = array.getResourceId(R.styleable.CalendarLayout_calendar_content_view_id, 0);
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array.recycle();
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//setSelectPosition(6);
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mVelocityTracker = VelocityTracker.obtain();
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final ViewConfiguration configuration = ViewConfiguration.get(context);
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mTouchSlop = configuration.getScaledTouchSlop();
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mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
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}
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void initCalendarPosition(Calendar cur) {
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java.util.Calendar date = java.util.Calendar.getInstance();
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date.set(cur.getYear(), cur.getMonth() - 1, 1);
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int diff = date.get(java.util.Calendar.DAY_OF_WEEK) - 1;//月第一天为星期几,星期天 == 0,则偏移几天
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int size = diff + cur.getDay();
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setSelectPosition(size);
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}
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/**
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* 当前第几项被选中
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*/
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void setSelectPosition(int selectPosition) {
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int line = (selectPosition + 7) / 7;
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mViewPagerTranslateY = (line - 1) * Util.dipToPx(getContext(), CalendarCardView.ITEM_HEIGHT);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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if (mContentView != null && mViewPager != null) {
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int h = getHeight() -
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Util.dipToPx(getContext(), CalendarCardView.ITEM_HEIGHT)
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- Util.dipToPx(getContext(), 41);
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int heightSpec = MeasureSpec.makeMeasureSpec(h,
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MeasureSpec.EXACTLY);
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mContentView.measure(widthMeasureSpec, heightSpec);
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}
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}
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@Override
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protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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super.onSizeChanged(w, h, oldw, oldh);
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mContentViewTranslateY = mViewPager.getMeasuredHeight() - Util.dipToPx(getContext(), CalendarCardView.ITEM_HEIGHT);
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}
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@Override
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protected void onFinishInflate() {
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super.onFinishInflate();
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mViewPager = (WrapViewPager) findViewById(R.id.vp_calendar).findViewById(R.id.vp_calendar);
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mContentView = (ViewGroup) findViewById(mContentViewId);
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if (mContentView != null) {
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mContentView.setOverScrollMode(View.OVER_SCROLL_NEVER);
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}
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}
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@Override
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public boolean onInterceptTouchEvent(MotionEvent ev) {
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if (isAnimating) {
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return true;
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}
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if (mContentView == null || mContentView.getVisibility() != VISIBLE) {
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return super.onInterceptTouchEvent(ev);
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}
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final int action = ev.getAction();
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float y = ev.getY();
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switch (action) {
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case MotionEvent.ACTION_DOWN:
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mLastY = downY = y;
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break;
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case MotionEvent.ACTION_MOVE:
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float dy = y - mLastY;
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/*
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如果向上滚动，且ViewPager已经收缩，不拦截事件
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*/
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if (dy < 0 && mContentView.getTranslationY() == -mContentViewTranslateY) {
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return false;
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}
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/*
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* 如果向下滚动，有 2 种情况处理 且y在ViewPager下方
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* 1、RecyclerView 或者其它滚动的View，当mContentView滚动到顶部时，拦截事件
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* 2、非滚动控件，直接拦截事件
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*/
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if (dy > 0 && mContentView.getTranslationY() == -mContentViewTranslateY
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&& y >= Util.dipToPx(getContext(), 98)) {
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if (!isScrollTop())
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return false;
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}
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if (dy > 0 && mContentView.getTranslationY() == 0 && y >= Util.dipToPx(getContext(), 98)) {
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return false;
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}
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if (Math.abs(dy) > mTouchSlop) {//大于mTouchSlop开始拦截事件，ContentView和ViewPager得到CANCEL事件
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if ((dy > 0 && mContentView.getTranslationY() <= 0)
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|| (dy < 0 && mContentView.getTranslationY() >= -mContentViewTranslateY)) {
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mLastY = y;
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return true;
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}
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}
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break;
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case MotionEvent.ACTION_CANCEL:
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case MotionEvent.ACTION_UP:
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break;
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}
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return super.onInterceptTouchEvent(ev);
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}
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@SuppressLint("ClickableViewAccessibility")
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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if (mContentView == null)
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return false;
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int action = event.getAction();
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float y = event.getY();
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mVelocityTracker.addMovement(event);
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switch (action) {
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case MotionEvent.ACTION_DOWN:
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mLastY = downY = y;
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return true;
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case MotionEvent.ACTION_MOVE:
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float dy = y - mLastY;
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if (dy < 0 && mContentView.getTranslationY() == -mContentViewTranslateY) {
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mContentView.onTouchEvent(event);
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return false;
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}
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if (dy > 0 && mContentView.getTranslationY() + dy >= 0) {
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mContentView.setTranslationY(0);
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translationViewPager();
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return super.onTouchEvent(event);
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}
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if (dy < 0 && mContentView.getTranslationY() + dy <= -mContentViewTranslateY) {
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mContentView.setTranslationY(-mContentViewTranslateY);
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translationViewPager();
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return super.onTouchEvent(event);
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}
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mContentView.setTranslationY(mContentView.getTranslationY() + dy);
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translationViewPager();
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mLastY = y;
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break;
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case MotionEvent.ACTION_CANCEL:
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case MotionEvent.ACTION_UP:
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final VelocityTracker velocityTracker = mVelocityTracker;
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velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
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float mYVelocity = velocityTracker.getYVelocity();
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if (mContentView.getTranslationY() == 0
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|| mContentView.getTranslationY() == mContentViewTranslateY) {
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break;
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}
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if (Math.abs(mYVelocity) >= 800) {
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if (mYVelocity < 0) {
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shrink();
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} else {
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expand();
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}
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return super.onTouchEvent(event);
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}
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if (event.getY() - downY > 0) {
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expand();
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} else {
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shrink();
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}
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break;
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}
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return super.onTouchEvent(event);
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}
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private void translationViewPager() {
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float percent = mContentView.getTranslationY() * 1.0f / mContentViewTranslateY;
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mViewPager.setTranslationY(mViewPagerTranslateY * percent);
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}
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/**
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* 展开
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*/
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public void expand() {
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ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mContentView,
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"translationY", mContentView.getTranslationY(), 0f);
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objectAnimator.setDuration(240);
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objectAnimator.addUpdateListener(new AnimatorUpdateListener() {
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@Override
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public void onAnimationUpdate(ValueAnimator animation) {
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float currentValue = (Float) animation.getAnimatedValue();
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float percent = currentValue * 1.0f / mContentViewTranslateY;
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mViewPager.setTranslationY(mViewPagerTranslateY * percent);
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}
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});
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objectAnimator.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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super.onAnimationEnd(animation);
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isAnimating = false;
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}
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});
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objectAnimator.start();
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}
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/**
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* 收缩
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*/
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public void shrink() {
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ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mContentView,
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"translationY", mContentView.getTranslationY(), -mContentViewTranslateY);
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objectAnimator.setDuration(240);
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objectAnimator.addUpdateListener(new AnimatorUpdateListener() {
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@Override
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public void onAnimationUpdate(ValueAnimator animation) {
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float currentValue = (Float) animation.getAnimatedValue();
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float percent = currentValue * 1.0f / mContentViewTranslateY;
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mViewPager.setTranslationY(mViewPagerTranslateY * percent);
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}
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});
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objectAnimator.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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super.onAnimationEnd(animation);
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isAnimating = false;
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}
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});
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objectAnimator.start();
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}
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/**
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* ContentView是否滚动到顶部
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*/
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private boolean isScrollTop() {
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if (mContentView instanceof RecyclerView)
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return ((RecyclerView) mContentView).computeVerticalScrollOffset() == 0;
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if (mContentView instanceof AbsListView) {
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boolean result = false;
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AbsListView listView = (AbsListView) mContentView;
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if (listView.getFirstVisiblePosition() == 0) {
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final View topChildView = listView.getChildAt(0);
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result = topChildView.getTop() == 0;
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}
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return result;
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}
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return mContentView.getScrollY() == 0;
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}
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}
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