// OpenTween - Client of Twitter
// Copyright (c) 2013 kim_upsilon (@kim_upsilon)
// All rights reserved.
//
// This file is part of OpenTween.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. If not, see , or write to
// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
// Boston, MA 02110-1301, USA.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
using System.Drawing;
using System.Threading.Tasks;
using System.Threading;
using System.Net;
using System.Net.Http;
using System.IO;
namespace OpenTween
{
public class OTPictureBox : PictureBox
{
[Browsable(false)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public new MemoryImage Image
{
get { return this.memoryImage; }
set
{
this.memoryImage = value;
base.Image = value != null ? value.Image : null;
this.RestoreSizeMode();
}
}
private MemoryImage memoryImage;
[Localizable(true)]
[DefaultValue(PictureBoxSizeMode.Normal)]
public new PictureBoxSizeMode SizeMode
{
get { return this.currentSizeMode; }
set
{
this.currentSizeMode = value;
if (base.Image != base.InitialImage && base.Image != base.ErrorImage)
{
base.SizeMode = value;
}
}
}
///
/// InitialImage や ErrorImage の表示に SizeMode を一時的に変更するため、
/// 現在の SizeMode を記憶しておくためのフィールド
///
private PictureBoxSizeMode currentSizeMode;
public void ShowInitialImage()
{
base.Image = base.InitialImage;
// InitialImage は SizeMode の値に依らず中央等倍に表示する必要がある
base.SizeMode = PictureBoxSizeMode.CenterImage;
}
public void ShowErrorImage()
{
base.Image = base.ErrorImage;
// ErrorImage は SizeMode の値に依らず中央等倍に表示する必要がある
base.SizeMode = PictureBoxSizeMode.CenterImage;
}
private void RestoreSizeMode()
{
base.SizeMode = this.currentSizeMode;
}
public async Task SetImageFromTask(Func> imageTask)
{
try
{
this.ShowInitialImage();
this.Image = await imageTask();
}
catch (Exception)
{
this.ShowErrorImage();
try
{
throw;
}
catch (HttpRequestException) { }
catch (InvalidImageException) { }
catch (OperationCanceledException) { }
catch (WebException) { }
}
}
protected override void OnPaint(PaintEventArgs pe)
{
try
{
base.OnPaint(pe);
}
catch (ExternalException)
{
// アニメーション GIF 再生中に発生するエラーの対策
// 参照: https://sourceforge.jp/ticket/browse.php?group_id=6526&tid=32894
this.ShowErrorImage();
}
}
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public new string ImageLocation
{
get { throw new NotSupportedException(); }
set { throw new NotSupportedException(); }
}
[EditorBrowsable(EditorBrowsableState.Never)]
public new void Load(string url)
{
throw new NotSupportedException();
}
}
}