timer gui

[void][System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")

if($PSVersionTable.PSVersion.Major -ge 3)
{
    $scope = 2
}
else
{
    $scope = 1
}

function Get-GUI()
{
    $returnValue = $null
    $Timeleft = New-TimeSpan -Seconds 300
    $ONESEC = New-TimeSpan -Seconds 1

    $objForm = New-Object -TypeName System.Windows.Forms.Form
    $objForm.Text = "Shutdown"
    $objForm.Size = New-Object System.Drawing.Size(300,200)
    $objForm.StartPosition = "CenterScreen"
    $objForm.ShowInTaskbar = $false
    $objForm.ShowIcon = $false
    $objForm.FormBorderStyle = "FixedDialog"
    $objForm.MaximizeBox = $false
    $objForm.MinimizeBox = $false
    $objForm.KeyPreview = $true
    $objForm.Add_KeyDown({if($_.KeyCode -eq "Enter"){Invoke-Command -ScriptBlock {Set-Variable -Name returnValue -Value $objTextBox.Text -Scope $scope; $objTimer.Stop(); $objForm.Close()}}})
    $objForm.Add_KeyDown({if($_.KeyCode -eq "Escape"){Invoke-Command -ScriptBlock {Set-Variable -Name returnValue -Value "Wait" -Scope $scope; $objTimer.Stop();  $objForm.Close()}}})

    $OKbutton = New-Object System.Windows.Forms.Button
    $OKbutton.Location = New-Object System.Drawing.Size(125,120)
    $OKbutton.Size = New-Object System.Drawing.Size(75,23)
    $OKbutton.Text = "Restart"
    $OKbutton.Add_Click({Invoke-Command -ScriptBlock {Set-Variable -Name returnValue -Value "Restart" -Scope $scope; $objTimer.Stop(); $objForm.Close()}})
    $objForm.Controls.Add($OKbutton)

    $Cancelbutton = New-Object System.Windows.Forms.Button
    $Cancelbutton.Location = New-Object System.Drawing.Size(200,120)
    $Cancelbutton.Size = New-Object System.Drawing.Size(75,23)
    $Cancelbutton.Text = "Wait"
    $Cancelbutton.Add_Click({Invoke-Command -ScriptBlock {Set-Variable -Name returnValue -Value "Wait" -Scope $scope; $objTimer.Stop(); $objForm.Close()}})
    $objForm.Controls.Add($Cancelbutton)

    $objLabel = New-Object System.Windows.Forms.Label
    $objLabel.Location = New-Object System.Drawing.Size(10,20)
    $objLabel.Size = New-Object System.Drawing.Size(280,40)
    $objLabel.Text = "Your computer will Restart in $($Timeleft.Minutes):$($Timeleft.Seconds) minutes.`nClick Restart to restart now.`nClick Wait to postpone for 15 minutes."
    $objForm.Controls.Add($objLabel)

    <#$objTextBox = New-Object System.Windows.Forms.TextBox
    $objTextBox.Size = New-Object System.Drawing.Size(100, 20)
    $objTextBox.Location = New-Object System.Drawing.Size(10, 120)
    $objTextBox.TextAlign = "Center"
    $objTextBox.ReadOnly = $true
    $objTextBox.Text = [string]$Timeleft.Minutes + ":" + $Timeleft.Seconds
    $objForm.Controls.Add($objTextBox)#>


    $objTimer = New-Object System.Windows.Forms.Timer
    $objTimer.Interval = 1000
    function Do-Tick()
    {
        $Timeleft = $Timeleft - $ONESEC
        $objLabel.Text = "Your computer will Restart in $($Timeleft.Minutes):$($Timeleft.Seconds) minutes.`nClick Restart to restart now.`nClick Wait to postpone for 15 minutes."
        If($Timeleft.TotalSeconds -lt 1)
        {
            Set-Variable -Name returnValue -Value "Restart" -Scope $scope
            $objForm.Close()
        }
    }
    $objTimer.Add_Tick({Do-Tick})
    $objTimer.Start()

    $objForm.TopMost = $true

    $objForm.Add_Shown($objForm.Activate())
    [Void]$objForm.ShowDialog()

    return $returnValue
}
Get-GUI