| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.calculator2; |
| |
| import android.view.LayoutInflater; |
| import android.view.ViewGroup; |
| import android.view.View; |
| import android.content.Context; |
| import android.widget.BaseAdapter; |
| import android.widget.TextView; |
| |
| import java.util.Vector; |
| |
| import org.javia.arity.SyntaxException; |
| |
| class HistoryAdapter extends BaseAdapter { |
| private Vector<HistoryEntry> mEntries; |
| private LayoutInflater mInflater; |
| private Logic mEval; |
| |
| HistoryAdapter(Context context, History history, Logic evaluator) { |
| mEntries = history.mEntries; |
| mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| mEval = evaluator; |
| } |
| |
| // @Override |
| public int getCount() { |
| return mEntries.size() - 1; |
| } |
| |
| // @Override |
| public Object getItem(int position) { |
| return mEntries.elementAt(position); |
| } |
| |
| // @Override |
| public long getItemId(int position) { |
| return position; |
| } |
| |
| @Override |
| public boolean hasStableIds() { |
| return true; |
| } |
| |
| // @Override |
| public View getView(int position, View convertView, ViewGroup parent) { |
| View view; |
| if (convertView == null) { |
| view = mInflater.inflate(R.layout.history_item, parent, false); |
| } else { |
| view = convertView; |
| } |
| |
| TextView expr = (TextView) view.findViewById(R.id.historyExpr); |
| TextView result = (TextView) view.findViewById(R.id.historyResult); |
| |
| HistoryEntry entry = mEntries.elementAt(position); |
| String base = entry.getBase(); |
| expr.setText(entry.getBase()); |
| |
| try { |
| String res = mEval.evaluate(base); |
| result.setText("= " + res); |
| } catch (SyntaxException e) { |
| result.setText(""); |
| } |
| |
| return view; |
| } |
| } |
| |