root/lang/csharp/Translater/Form1.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
using JishoPlugin;

namespace Jisho
{
    public partial class Form1 : Form , IPluginHost
    {
        private List<JishoBase> engines_;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            initializeWordControl();
            loadPlugins();
            setTranslateEngineList();
        }

        /// <summary>
        /// プラグインが登録された時
        /// </summary>
        /// <param name="ipi"></param>
        /// <returns></returns>
        public bool Register(JishoBase ipi)
        {
            resultTextBox.AppendText( string.Format(@"Regist:{0}", ipi.Name) ) ;
            resultTextBox.AppendText(Environment.NewLine);
            return true;
        }

        #region 検索用語関係

        /// <summary>
        /// 用語の初期化
        /// </summary>
        void initializeWordControl()
        {
            wordTextBox.ForeColor = Color.Gray;
            wordTextBox.Click += wordTextBox_Click;
            wordTextBox.Leave += wordTextBox_Leave;
            wordTextBox.Enter += wordTextBox_Enter;
            wordTextBox.KeyDown += wordTextBox_KeyDown;
        }

        /// <summary>
        /// 和訳作業
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void wordTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.KeyCode == Keys.Return)
            {
                resultTextBox.Clear();

                if( String.IsNullOrEmpty(wordTextBox.Text))
                    return;

                // 取得した和訳結果をテキストボックスへ
                foreach (string result in translate(wordTextBox.Text))
                {
                    resultTextBox.AppendText(result);
                    resultTextBox.AppendText(Environment.NewLine);
                }
            }
        }

        /// <summary>
        /// テキストボックスにフォーカス入った時
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void wordTextBox_Enter(object sender, EventArgs e)
        {
            wordTextBox.ForeColor = Color.Black;
        }

        /// <summary>
        /// テキストボックスからフォーカス外れた時
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void wordTextBox_Leave(object sender, EventArgs e)
        {
            wordTextBox.ForeColor = Color.Gray; 
        }

        /// <summary>
        /// テキストボックスをクリックした時
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void wordTextBox_Click(object sender, EventArgs e)
        {
            wordTextBox.SelectAll();
        }

        #endregion

        #region 翻訳処理

        /// <summary>
        /// プラグインをロードする
        /// </summary>
        void loadPlugins()
        {
            string pwd = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
            string loadpath = pwd + Path.DirectorySeparatorChar + "dll";

            string[] dlls = Directory.GetFiles(loadpath, "*.dll");
            string pluginInterface = typeof (IWebJisho).FullName;

            engines_ = new List<JishoBase>();
            foreach (string name in dlls)
            {
                Assembly asm = Assembly.LoadFrom(name);
                Type[] types = asm.GetTypes();
                foreach (Type t in types)
                {
                    if (t.IsClass && t.GetInterface(pluginInterface) != null)
                    {
                        JishoBase ipi = (JishoBase) asm.CreateInstance(t.FullName);
                        engines_.Add(ipi);
                        // ここでRegistメソッドが呼ばれて、ホスト側で実装した
                        // Registが呼び出される。
                        ipi.Host = this; 
                    }
                }
            }
        }

        /// <summary>
        /// 翻訳
        /// </summary>
        /// <param name="word"></param>
        /// <returns></returns>
        private List<string> translate(string word)
        {
            JishoBase dic = engines_[engineLists.SelectedIndex];
            if ( !dic.Translate(word) )
                return new List<string>();
            return dic.Means;
        }

        /// <summary>
        /// 翻訳エンジンの設定
        /// </summary>
        void setTranslateEngineList()
        {
            foreach (JishoBase engine in engines_)
            {
                engineLists.Items.Add(engine);
            }
            if (engines_.Count > 0)
                engineLists.SelectedIndex = 0;
        }

        #endregion

        /// <summary>
        /// 選択したときにアイコンを設定
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void engineLists_SelectedIndexChanged(object sender, EventArgs e)
        {
            if(engines_==null)
                return;
            if (engines_ != null)
            {
                // imageからiconへの変換
                Bitmap bmp = (Bitmap) engines_[engineLists.SelectedIndex].Images[0];
                Icon = Icon.FromHandle(bmp.GetHicon());
            }
        }
    }
}