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.Net.Http;
  34 using System.IO;
  35 using OpenTween.Thumbnail;
  36
  37 namespace OpenTween
  38 {
  39     public class OTPictureBox : PictureBox
  40     {
  41         [Browsable(false)]
  42         [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
  43         public new MemoryImage Image
  44         {
  45             get { return this.memoryImage; }
  46             set
  47             {
  48                 this.memoryImage = value;
  49                 base.Image = value != null ? value.Image : null;
  50
  51                 this.RestoreSizeMode();
  52             }
  53         }
  54         private MemoryImage memoryImage;
  55
  56         [Localizable(true)]
  57         [DefaultValue(PictureBoxSizeMode.Normal)]
  58         public new PictureBoxSizeMode SizeMode
  59         {
  60             get { return this.currentSizeMode; }
  61             set
  62             {
  63                 this.currentSizeMode = value;
  64
  65                 if (base.Image != base.InitialImage && base.Image != base.ErrorImage)
  66                 {
  67                     base.SizeMode = value;
  68                 }
  69             }
  70         }
  71
  72         /// <summary>
  73         /// InitialImage や ErrorImage の表示に SizeMode を一時的に変更するため、
  74         /// 現在の SizeMode を記憶しておくためのフィールド
  75         /// </summary>
  76         private PictureBoxSizeMode currentSizeMode;
  77
  78         public void ShowInitialImage()
  79         {
  80             base.Image = base.InitialImage;
  81
  82             // InitialImage は SizeMode の値に依らず中央等倍に表示する必要がある
  83             base.SizeMode = PictureBoxSizeMode.CenterImage;
  84         }
  85
  86         public void ShowErrorImage()
  87         {
  88             base.Image = base.ErrorImage;
  89
  90             // ErrorImage は SizeMode の値に依らず中央等倍に表示する必要がある
  91             base.SizeMode = PictureBoxSizeMode.CenterImage;
  92         }
  93
  94         private void RestoreSizeMode()
  95         {
  96             base.SizeMode = this.currentSizeMode;
  97         }
  98
  99         public async Task SetImageFromTask(Func<Task<MemoryImage>> imageTask)
 100         {
 101             try
 102             {
 103                 this.ShowInitialImage();
 104                 this.Image = await imageTask();
 105             }
 106             catch (Exception)
 107             {
 108                 this.ShowErrorImage();
 109                 try
 110                 {
 111                     throw;
 112                 }
 113                 catch (HttpRequestException) { }
 114                 catch (InvalidImageException) { }
 115                 catch (OperationCanceledException) { }
 116                 catch (WebException) { }
 117             }
 118         }
 119
 120         protected override void OnPaint(PaintEventArgs pe)
 121         {
 122             try
 123             {
 124                 base.OnPaint(pe);
 125
 126                 // 動画なら再生ボタンを上から描画
 127                 DrawPlayableMark(pe);
 128             }
 129             catch (ExternalException)
 130             {
 131                 // アニメーション GIF 再生中に発生するエラーの対策
 132                 // 参照: https://sourceforge.jp/ticket/browse.php?group_id=6526&tid=32894
 133                 this.ShowErrorImage();
 134             }
 135         }
 136
 137         private void DrawPlayableMark(PaintEventArgs pe)
 138         {
 139             var thumb = this.Tag as ThumbnailInfo;
 140             if (thumb == null || !thumb.IsPlayable) return;
 141             if (base.Image == base.InitialImage || base.Image == base.ErrorImage) return;
 142
 143             var overlayImage = Properties.Resources.PlayableOverlayImage;
 144
 145             var overlaySize = Math.Min(this.Width, this.Height) / 4;
 146             var destRect = new Rectangle(
 147                 (this.Width - overlaySize) / 2,
 148                 (this.Height - overlaySize) / 2,
 149                 overlaySize,
 150                 overlaySize);
 151
 152             pe.Graphics.DrawImage(overlayImage, destRect, 0, 0, overlayImage.Width, overlayImage.Height, GraphicsUnit.Pixel);
 153         }
 154
 155         [Browsable(false)]
 156         [EditorBrowsable(EditorBrowsableState.Never)]
 157         [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
 158         public new string ImageLocation
 159         {
 160             get { throw new NotSupportedException(); }
 161             set { throw new NotSupportedException(); }
 162         }
 163
 164         [EditorBrowsable(EditorBrowsableState.Never)]
 165         public new void Load(string url)
 166         {
 167             throw new NotSupportedException();
 168         }
 169     }
 170 }