Public Shared Sub ShowLoadingScreen()
' Make sure it's only launched once.
If ms_form IsNot Nothing Then
Return
End If
ms_oThread = New Thread(New ThreadStart(LoadingScreen.ShowForm))
ms_oThread.IsBackground = True
ms_oThread.ApartmentState = ApartmentState.STA
ms_oThread.Start()
End Sub
' A private entry point for the thread.
Private Shared Sub ShowForm()
ms_form = New LoadingScreen()
Application.Run(ms_form)
End Sub
Public Shared Sub CloseForm()
If ms_form IsNot Nothing AndAlso ms_form.IsDisposed = False Then
' Make it start going away.
ms_form.m_dblOpacityIncrement = -ms_form.m_dblOpacityDecrement
End If
ms_oThread = Nothing
' we don't need these any more.
ms_form = Nothing
End Sub
' A static method to set the status and update the reference.
Public Shared Sub SetStatus(newStatus As String)
SetStatus(newStatus, True)
End Sub
Public Shared Sub SetStatus(newStatus As String, setReference As Boolean)
ms_sStatus = newStatus
If ms_form Is Nothing Then
Return
End If
If setReference Then
ms_form.SetReference()
End If
End Sub
Private Sub SetReference()
If m_bDTSet = False Then
m_bDTSet = True
m_dtStart = DateTime.Now
ReadIncrements()
End If
Dim dblMilliseconds As Double = ElapsedMilliSeconds()
m_alActualTimes.Add(dblMilliseconds)
m_dblLastCompletionFraction = m_dblCompletionFraction
If m_alPreviousCompletionFraction IsNot Nothing AndAlso m_iIndex < m_alPreviousCompletionFraction.Count Then
m_dblCompletionFraction = CDbl(m_alPreviousCompletionFraction(System.Math.Max(System.Threading.Interlocked.Increment(m_iIndex),m_iIndex - 1)))
Else
m_dblCompletionFraction = If((m_iIndex > 0), 1, 0)
End If
End Sub
' Utility function to return elapsed Milliseconds
Private Function ElapsedMilliSeconds() As Double
Dim ts As TimeSpan = DateTime.Now - m_dtStart
Return ts.TotalMilliseconds
End Function
'reading the registry values
Private Sub ReadIncrements()
Dim sPBIncrementPerTimerInterval As String = RegistryAccess.GetStringRegistryValue(REGVALUE_PB_MILISECOND_INCREMENT, "0.0015")
Dim dblResult As Double
If [Double].TryParse(sPBIncrementPerTimerInterval, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, dblResult) = True Then
m_dblPBIncrementPerTimerInterval = dblResult
Else
m_dblPBIncrementPerTimerInterval = 0.0015
End If
Dim sPBPreviousPctComplete As String = RegistryAccess.GetStringRegistryValue(REGVALUE_PB_PERCENTS, "")
If sPBPreviousPctComplete <> "" Then
Dim aTimes As String() = sPBPreviousPctComplete.Split(Nothing)
m_alPreviousCompletionFraction = New ArrayList()
For i As Integer = 0 To aTimes.Length - 1
Dim dblVal As Double
If [Double].TryParse(aTimes(i), System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, dblVal) Then
m_alPreviousCompletionFraction.Add(dblVal)
Else
m_alPreviousCompletionFraction.Add(1.0)
End If
Next
Else
m_bFirstLaunch = True
lblTimeRemaining.Text = ""
End If
End Sub
' Method to store the intervals (in percent complete) from the current invocation
' to the registry.
Private Sub StoreIncrements()
Dim sPercent As String = ""
Dim dblElapsedMilliseconds As Double = ElapsedMilliSeconds()
For i As Integer = 0 To m_alActualTimes.Count - 1
sPercent += (CDbl(m_alActualTimes(i)) / dblElapsedMilliseconds).ToString("0.####", System.Globalization.NumberFormatInfo.InvariantInfo) & " "
Next
RegistryAccess.SetStringRegistryValue(REGVALUE_PB_PERCENTS, sPercent)
m_dblPBIncrementPerTimerInterval = 1.0 / CDbl(m_iActualTicks)
RegistryAccess.SetStringRegistryValue(REGVALUE_PB_MILISECOND_INCREMENT, m_dblPBIncrementPerTimerInterval.ToString("#.000000", System.Globalization.NumberFormatInfo.InvariantInfo))
End Sub
'********* Event Handlers ************
' Tick Event handler for the Timer control. Handle fade in and fade out. Also
' handle the smoothed progress bar.
Private Sub timer1_Tick(sender As Object, e As System.EventArgs)
lblStatus.Text = ms_sStatus
If m_dblOpacityIncrement > 0 Then
m_iActualTicks += 1
If Me.Opacity < 1 Then
Me.Opacity += m_dblOpacityIncrement
End If
Else
If Me.Opacity > 0 Then
Me.Opacity += m_dblOpacityIncrement
Else
StoreIncrements()
Me.Close()
Debug.WriteLine("Called this.Close()")
End If
End If
If m_bFirstLaunch = False AndAlso m_dblLastCompletionFraction < m_dblCompletionFraction Then
m_dblLastCompletionFraction += m_dblPBIncrementPerTimerInterval
Dim width As Integer = CInt(Math.Floor(pnlStatus.ClientRectangle.Width * m_dblLastCompletionFraction))
Dim height As Integer = pnlStatus.ClientRectangle.Height
Dim x As Integer = pnlStatus.ClientRectangle.X
Dim y As Integer = pnlStatus.ClientRectangle.Y
If width > 0 AndAlso height > 0 Then
m_rProgress = New Rectangle(x, y, width, height)
pnlStatus.Invalidate(m_rProgress)
Dim iSecondsLeft As Integer = 1 + CInt(Math.Truncate(TIMER_INTERVAL * ((1.0 - m_dblLastCompletionFraction) / m_dblPBIncrementPerTimerInterval))) \ 1000
If iSecondsLeft = 1 Then
lblTimeRemaining.Text = String.Format("1 second remaining")
Else
lblTimeRemaining.Text = String.Format("{0} seconds remaining", iSecondsLeft)
End If
End If
End If
End Sub
' Paint the portion of the panel invalidated during the tick event.
Private Sub pnlStatus_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs)
If m_bFirstLaunch = False AndAlso e.ClipRectangle.Width > 0 AndAlso m_iActualTicks > 1 Then
Dim brBackground As New LinearGradientBrush(m_rProgress, Color.FromArgb(14, 105, 168), Color.FromArgb(6, 38, 61), LinearGradientMode.Horizontal)
e.Graphics.FillRectangle(brBackground, m_rProgress)
End If
End Sub
