Question

我正在努力寻找一种方法来返回当前Y值工具提示中图表中的前一个Y值。我的想法是，我想要执行＆＃34; this.y - this.y（-1）＆＃34; （得到这个。（y-1））值并找出当前和之前的值之间的差异。理想情况下，这将位于图表

中每个值的工具提示中

我的代码如下：

public class SingleCheckAdapter extends RecyclerView.Adapter<SingleCheckAdapter.SingleCheckViewHolder> {

private int mSelectedItem = -1;
private List<PersonItem> mSingleCheckList;
private Context mContext;
private AdapterView.OnItemClickListener onItemClickListener;

public SingleCheckAdapter(Context context, List<PersonItem> listItems) {
    mContext = context;
    mSingleCheckList = listItems;
}

@Override
public SingleCheckViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    LayoutInflater inflater = LayoutInflater.from(mContext);
    final View view = inflater.inflate(R.layout.item_single_check, viewGroup, false);
    return new SingleCheckViewHolder(view, this);
}

@Override
public void onBindViewHolder(SingleCheckViewHolder viewHolder, final int position) {
    PersonItem item = mSingleCheckList.get(position);
    try {
        viewHolder.setDateToView(item, position);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

@Override
public int getItemCount() {
    return mSingleCheckList.size();
}

public void setOnItemClickListener(AdapterView.OnItemClickListener onItemClickListener) {
    this.onItemClickListener = onItemClickListener;
}


public void onItemHolderClick(SingleCheckViewHolder holder) {
    if (onItemClickListener != null)
        onItemClickListener.onItemClick(null, holder.itemView, holder.getAdapterPosition(), holder.getItemId());
}

class SingleCheckViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    private SingleCheckAdapter mAdapter;
    private RadioButton mRadio;
    private TextView mText;

    public SingleCheckViewHolder(View itemView, final SingleCheckAdapter mAdapter) {
        super(itemView);
        this.mAdapter = mAdapter;

        mText = (TextView) itemView.findViewById(R.id.text);
        mRadio = (RadioButton) itemView.findViewById(R.id.radio);
        itemView.setOnClickListener(this);
        mRadio.setOnClickListener(this);
    }

    public void setDateToView(PersonItem item, int position) throws Exception {
        mRadio.setChecked(position == mSelectedItem);
        mText.setText(item.getPersonName());
    }

    @Override
    public void onClick(View v) {
        mSelectedItem = getAdapterPosition();
        notifyItemRangeChanged(0, mSingleCheckList.size());
        mAdapter.onItemHolderClick(SingleCheckViewHolder.this);
    }
}

Answer 1

您需要在工具提示格式化程序中使用 this.point 对象的索引和系列属性。< / p>

tooltip: {
    formatter:function(){
        var diffText = '',
            i = this.point.index;

        if (i > 0) {
            diffText = '<br><b>Difference: </b>' + (this.y - this.point.series.data[i-1].y);
        }

        return '<b>Date:</b> ' + Highcharts.dateFormat('%B %e %Y', this.x) + '<br>' + '<b>Amount:</b> ' + this.y + '<br>' + diffText;
    }
},

以下是演示：https://jsfiddle.net/alex_ua/7u80r0c3/2/

工具提示HighCharts中Y值减1

1 个答案: