OpenTween/OTPictureBox.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2013 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
   3 // All rights reserved.
   4 //
   5 // This file is part of OpenTween.
   6 //
   7 // This program is free software; you can redistribute it and/or modify it
   8 // under the terms of the GNU General Public License as published by the Free
   9 // Software Foundation; either version 3 of the License, or (at your option)
  10 // any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  15 // for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this program. If not, see <http://www.gnu.org/licenses/>, or write to
  19 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  20 // Boston, MA 02110-1301, USA.
  21
  22 using System;
  23 using System.Collections.Generic;
  24 using System.Linq;
  25 using System.Runtime.InteropServices;
  26 using System.Text;
  27 using System.Windows.Forms;
  28 using System.ComponentModel;
  29 using System.Drawing;
  30 using System.Threading.Tasks;
  31 using System.Threading;
  32 using System.Net;
  33 using System.IO;
  34
  35 namespace OpenTween
  36 {
  37     public class OTPictureBox : PictureBox
  38     {
  39         [Browsable(false)]
  40         [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  41         public new MemoryImage Image
  42         {
  43             get { return this.memoryImage; }
  44             set
  45             {
  46                 this.memoryImage = value;
  47                 base.Image = value != null ? value.Image : null;
  48
  49                 this.RestoreSizeMode();
  50             }
  51         }
  52         private MemoryImage memoryImage;
  53
  54         [Localizable(true)]
  55         [DefaultValue(PictureBoxSizeMode.Normal)]
  56         public new PictureBoxSizeMode SizeMode
  57         {
  58             get { return this.currentSizeMode; }
  59             set
  60             {
  61                 this.currentSizeMode = value;
  62
  63                 if (base.Image != base.InitialImage && base.Image != base.ErrorImage)
  64                 {
  65                     base.SizeMode = value;
  66                 }
  67             }
  68         }
  69
  70         /// <summary>
  71         /// InitialImage や ErrorImage の表示に SizeMode を一時的に変更するため、
  72         /// 現在の SizeMode を記憶しておくためのフィールド
  73         /// </summary>
  74         private PictureBoxSizeMode currentSizeMode;
  75
  76         public void ShowInitialImage()
  77         {
  78             base.Image = base.InitialImage;
  79
  80             // InitialImage は SizeMode の値に依らず中央等倍に表示する必要がある
  81             base.SizeMode = PictureBoxSizeMode.CenterImage;
  82         }
  83
  84         public void ShowErrorImage()
  85         {
  86             base.Image = base.ErrorImage;
  87
  88             // ErrorImage は SizeMode の値に依らず中央等倍に表示する必要がある
  89             base.SizeMode = PictureBoxSizeMode.CenterImage;
  90         }
  91
  92         private void RestoreSizeMode()
  93         {
  94             base.SizeMode = this.currentSizeMode;
  95         }
  96
  97         protected override void OnPaint(PaintEventArgs pe)
  98         {
  99             try
 100             {
 101                 base.OnPaint(pe);
 102             }
 103             catch (ExternalException)
 104             {
 105                 // アニメーション GIF 再生中に発生するエラーの対策
 106                 // 参照: https://sourceforge.jp/ticket/browse.php?group_id=6526&tid=32894
 107                 this.ShowErrorImage();
 108             }
 109         }
 110
 111         [Browsable(false)]
 112         [EditorBrowsable(EditorBrowsableState.Never)]
 113         [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 114         public new string ImageLocation
 115         {
 116             get { throw new NotImplementedException(); }
 117             set { throw new NotImplementedException(); }
 118         }
 119
 120         [EditorBrowsable(EditorBrowsableState.Never)]
 121         public new void Load(string url)
 122         {
 123             throw new NotImplementedException();
 124         }
 125     }
 126 }