131 lines
4.1 KiB
VB.net
131 lines
4.1 KiB
VB.net
#Region "Microsoft.VisualBasic::2a646fb97d850a9e813b641b202002cf, Microsoft.VisualBasic.Core\ApplicationServices\Terminal\ProgressBar\SwayBar.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 SwayBar
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'
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'
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' Enum direction
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' left, right
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'
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'
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'
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'
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'
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' Constructor: (+1 Overloads) Sub New
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'
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' Function: BlankPointer
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'
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' Sub: [Step], ClearBar, PlacePointer
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Text
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Namespace Terminal.ProgressBar
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Public Class SwayBar : Inherits AbstractBar
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Private bar As String
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Private pointer As String
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Private _blankPointer As String
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Private counter As Integer
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Private currdir As direction
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Private Enum direction
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right
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left
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End Enum
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Public Sub New()
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MyBase.New()
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Me.bar = "| |"
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Me.pointer = "***"
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Me._blankPointer = Me.BlankPointer()
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Me.currdir = direction.right
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Me.counter = 1
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End Sub
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''' <summary>
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''' sets the atribute blankPointer with a empty string the same length that the pointer
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''' </summary>
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''' <returns>A string filled with space characters</returns>
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Private Function BlankPointer() As String
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Dim blank As New StringBuilder()
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For cont As Integer = 0 To Me.pointer.Length - 1
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blank.Append(" ")
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Next
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Return blank.ToString()
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End Function
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''' <summary>
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''' reset the bar to its original state
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''' </summary>
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Private Sub ClearBar()
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Me.bar = Me.bar.Replace(Me.pointer, Me._blankPointer)
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End Sub
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''' <summary>
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''' remove the previous pointer and place it in a new possition
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''' </summary>
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''' <param name="start">start index</param>
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''' <param name="end">end index</param>
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Private Sub PlacePointer(start As Integer, [end] As Integer)
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Me.ClearBar()
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Me.bar = Me.bar.Remove(start, [end])
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Me.bar = Me.bar.Insert(start, Me.pointer)
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End Sub
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''' <summary>
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''' prints the progress bar acorrding to pointers and current direction
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''' </summary>
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Public Overrides Sub [Step]()
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If Me.currdir = direction.right Then
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Me.PlacePointer(counter, Me.pointer.Length)
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Me.counter += 1
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If Me.counter + Me.pointer.Length = Me.bar.Length Then
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Me.currdir = direction.left
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End If
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Else
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Me.PlacePointer(counter - Me.pointer.Length, Me.pointer.Length)
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Me.counter -= 1
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If Me.counter = Me.pointer.Length Then
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Me.currdir = direction.right
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End If
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End If
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Console.Write(Me.bar & vbCr)
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End Sub
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End Class
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End Namespace
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