package com.weikou.beibeivideo.util;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.util.AttributeSet;
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import android.util.TypedValue;
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import android.view.MotionEvent;
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import android.view.ViewGroup;
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import android.widget.HorizontalScrollView;
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import android.widget.LinearLayout;
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import com.lcjian.lcjianlibrary.R;
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import com.lcjian.library.util.ScreenUtils;
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import com.nineoldandroids.view.ViewHelper;
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/**
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* 仿酷狗音乐侧滑
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*/
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public class SlidingMenu extends HorizontalScrollView {
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/**
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* 屏幕宽度
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*/
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private int mScreenWidth;
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/**
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* dp
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*/
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private int mMenuRightPadding;
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/**
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* 菜单的宽度
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*/
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private int mMenuWidth;
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private int mHalfMenuWidth;
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private boolean isOpen;
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private boolean once;
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private ViewGroup mMenu;
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private ViewGroup mContent;
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public SlidingMenu(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public SlidingMenu(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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mScreenWidth = ScreenUtils.getScreenWidth(context);
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TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
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R.styleable.SlidingMenu, defStyle, 0);
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int n = a.getIndexCount();
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for (int i = 0; i < n; i++) {
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int attr = a.getIndex(i);
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switch (attr) {
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case 0:
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// 默认50
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mMenuRightPadding = a.getDimensionPixelSize(attr,
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(int) TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, 50f,
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getResources().getDisplayMetrics()));// 默认为10DP
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break;
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}
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}
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a.recycle();
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}
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public SlidingMenu(Context context) {
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this(context, null, 0);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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/**
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* 显示的设置一个宽度
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*/
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if (!once) {
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LinearLayout wrapper = (LinearLayout) getChildAt(0);
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mMenu = (ViewGroup) wrapper.getChildAt(0);
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mContent = (ViewGroup) wrapper.getChildAt(1);
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mMenuWidth = mScreenWidth - mMenuRightPadding;
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mHalfMenuWidth = mMenuWidth / 2;
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mMenu.getLayoutParams().width = mMenuWidth;
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mContent.getLayoutParams().width = mScreenWidth;
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}
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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super.onLayout(changed, l, t, r, b);
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if (changed) {
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// 将菜单隐藏
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this.scrollTo(mMenuWidth, 0);
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once = true;
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}
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}
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@Override
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public boolean onTouchEvent(MotionEvent ev) {
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int action = ev.getAction();
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switch (action) {
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// Up时，进行判断，如果显示区域大于菜单宽度一半则完全显示，否则隐藏
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case MotionEvent.ACTION_UP:
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int scrollX = getScrollX();
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if (scrollX > mHalfMenuWidth) {
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this.smoothScrollTo(mMenuWidth, 0);
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isOpen = false;
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} else {
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this.smoothScrollTo(0, 0);
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isOpen = true;
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}
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return true;
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}
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return super.onTouchEvent(ev);
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}
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/**
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* 打开菜单
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*/
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public void openMenu() {
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if (isOpen)
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return;
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this.smoothScrollTo(0, 0);
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isOpen = true;
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}
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/**
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* 关闭菜单
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*/
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public void closeMenu() {
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if (isOpen) {
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this.smoothScrollTo(mMenuWidth, 0);
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isOpen = false;
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}
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}
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/**
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* 切换菜单状态
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*/
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public void toggle() {
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if (isOpen) {
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closeMenu();
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} else {
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openMenu();
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}
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}
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@Override
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protected void onScrollChanged(int l, int t, int oldl, int oldt) {
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super.onScrollChanged(l, t, oldl, oldt);
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float scale = l * 1.0f / mMenuWidth;
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float leftScale = 1 - 0.3f * scale;
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float rightScale = 0.8f + scale * 0.2f;
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ViewHelper.setScaleX(mMenu, leftScale);
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ViewHelper.setScaleY(mMenu, leftScale);
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ViewHelper.setAlpha(mMenu, 0.6f + 0.4f * (1 - scale));
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ViewHelper.setTranslationX(mMenu, mMenuWidth * scale * 0.7f);
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ViewHelper.setPivotX(mContent, 0);
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ViewHelper.setPivotY(mContent, mContent.getHeight() / 2);
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ViewHelper.setScaleX(mContent, rightScale);
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ViewHelper.setScaleY(mContent, rightScale);
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}
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}
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