package cn.shangyu.gdxzExpert.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RadioGroup;

public class GridRadioGroup extends RadioGroup {
    //子布局RadioButton 列数
    private int column = 2;
    //文字
    private int textPaddingTB = 0;

    private int widthmargin = 0;
    private int heighmargin = 0;
    private int itemWidth;

    public GridRadioGroup(Context context) {
        this(context, null);
    }

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
        itemWidth = (widthSize - (column + 1) * widthmargin) / column;

        int childCount = getChildCount();

        int itemHeight = 0;

        for (int i = 0; i < childCount; i++) {
            View child = getChildAt(i);
            child.setPadding(0, textPaddingTB, 0, textPaddingTB);
            child.measure(MeasureSpec.makeMeasureSpec(itemWidth, MeasureSpec.EXACTLY),
                    MeasureSpec.UNSPECIFIED);
            itemHeight = child.getMeasuredHeight();
        }

        int rows = childCount % column == 0 ? childCount / column : childCount / column + 1;
        int heightSize = rows * itemHeight + (rows + 1) * heighmargin;
        setMeasuredDimension(widthMeasureSpec, heightSize);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        int childCount = getChildCount();
        int rows = 0;
        for (int i = 0; i < childCount; i++) {
            View view = getChildAt(i);
            int width = view.getMeasuredWidth();
            int height = view.getMeasuredHeight();

            int yu = i % column;
            int cl, ct, cr, cb;
            if (i >= column - 1 && yu == 0) {
                rows++;
            }

            cl = widthmargin * (yu + 1) + yu * width;
            ct = heighmargin * (rows + 1) + rows * height;
            cr = widthmargin * (yu + 1) + (yu + 1) * width;
            cb = heighmargin * (rows + 1) + (rows + 1) * height;
            view.layout(cl, ct, cr, cb);
        }
    }
}