107 lines
3.7 KiB
VB.net
107 lines
3.7 KiB
VB.net
#Region "Microsoft.VisualBasic::1185cde58c7a8dc179cafbb41aac9979, Microsoft.VisualBasic.Core\ApplicationServices\Terminal\Utility\UserTaskCancelAction.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class UserTaskCancelAction
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'
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' Constructor: (+1 Overloads) Sub New
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'
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' Function: ToString
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'
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' Sub: (+2 Overloads) Dispose, handleCancel
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'
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'
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' /********************************************************************************/
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#End Region
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Namespace ApplicationServices.Terminal.Utility
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''' <summary>
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''' A finalize action after the user cancel current task operations.
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''' </summary>
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Public Class UserTaskCancelAction : Implements IDisposable
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ReadOnly finalizeAction As Action
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Sub New(finalize As Action)
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finalizeAction = finalize
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AddHandler Console.CancelKeyPress, AddressOf handleCancel
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End Sub
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Private Sub handleCancel(sender As Object, terminate As ConsoleCancelEventArgs)
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' ctrl + C just break the current executation
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' not exit program running
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terminate.Cancel = True
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finalizeAction()
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End Sub
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Public Overrides Function ToString() As String
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Return finalizeAction.ToString
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End Function
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#Region "IDisposable Support"
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Private disposedValue As Boolean ' 要检测冗余调用
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' IDisposable
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Protected Overridable Sub Dispose(disposing As Boolean)
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If Not disposedValue Then
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If disposing Then
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' TODO: 释放托管状态(托管对象)。
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RemoveHandler Console.CancelKeyPress, AddressOf handleCancel
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End If
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' TODO: 释放未托管资源(未托管对象)并在以下内容中替代 Finalize()。
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' TODO: 将大型字段设置为 null。
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End If
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disposedValue = True
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End Sub
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' TODO: 仅当以上 Dispose(disposing As Boolean)拥有用于释放未托管资源的代码时才替代 Finalize()。
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'Protected Overrides Sub Finalize()
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' ' 请勿更改此代码。将清理代码放入以上 Dispose(disposing As Boolean)中。
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' Dispose(False)
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' MyBase.Finalize()
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'End Sub
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' Visual Basic 添加此代码以正确实现可释放模式。
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Public Sub Dispose() Implements IDisposable.Dispose
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' 请勿更改此代码。将清理代码放入以上 Dispose(disposing As Boolean)中。
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Dispose(True)
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' TODO: 如果在以上内容中替代了 Finalize()，则取消注释以下行。
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' GC.SuppressFinalize(Me)
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End Sub
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#End Region
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End Class
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End Namespace
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