package com.kjt.app.activity.myaccount.MyNewStoreTemplate;

import android.content.res.Resources;
import android.support.design.widget.TabLayout;
import android.util.TypedValue;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.lang.reflect.Field;

/**
 * Created by xiayujia on 2017/6/20.
 */

public class TabLayoutIndicator {

    /**
     * 修改tablayout寬度
     * @param tabs
     * @param leftDip
     * @param rightDip
     */
    public static void setIndicator(TabLayout tabs, int leftDip, int rightDip) {
        Class<?> tabLayout = tabs.getClass();
        Field tabStrip = null;
        try {
            tabStrip = tabLayout.getDeclaredField("mTabStrip");
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        }

        tabStrip.setAccessible(true);
        LinearLayout llTab = null;
        try {
            llTab = (LinearLayout) tabStrip.get(tabs);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        int left = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, leftDip, Resources.getSystem().getDisplayMetrics());
        int right = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, rightDip, Resources.getSystem().getDisplayMetrics());
        for (int i = 0; i < llTab.getChildCount(); i++) {
            View child = llTab.getChildAt(i);
            child.setPadding(0, 0, 0, 0);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1);
            params.leftMargin = left;
            params.rightMargin = right;
            child.setLayoutParams(params);
            child.invalidate();
        }
    }

    public static void setIndicator(TabLayout tabLayout) {
        try {
            //拿到tabLayout的mTabStrip屬性
            Field mTabStripField = tabLayout.getClass().getDeclaredField("mTabStrip");
            mTabStripField.setAccessible(true);

            LinearLayout mTabStrip = (LinearLayout) mTabStripField.get(tabLayout);

//            int dp10 = SM.dip2px(getContext(), 10);

            for (int i = 0; i < mTabStrip.getChildCount(); i++) {
                View tabView = mTabStrip.getChildAt(i);

                //拿到tabView的mTextView屬性
                Field mTextViewField = tabView.getClass().getDeclaredField("mTextView");
                mTextViewField.setAccessible(true);

                TextView mTextView = (TextView) mTextViewField.get(tabView);

                tabView.setPadding(0, 0, 0, 0);

                //因為我想要的效果是   字多寬線就多寬，所以測量mTextView的寬度
                int width = 0;
                width = mTextView.getWidth();
                if (width == 0) {
                    mTextView.measure(0, 0);
                    width = mTextView.getMeasuredWidth();
                }

                //設定tab左右間距為10dp  注意這裡不能使用Padding 因為原始碼中線的寬度是根據 tabView的寬度來設定的
                LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) tabView.getLayoutParams();
                params.width = width ;
                params.leftMargin = 57;
                params.rightMargin = 57;
                tabView.setLayoutParams(params);

                tabView.invalidate();
            }

        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}