functions/Start-PSCountdownTimer.ps1
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Function Start-PSCountdownTimer { [cmdletbinding()] [OutputType("None")] Param( [Parameter(Position = 0, HelpMessage = "Enter seconds to countdown from")] [Int]$Seconds = 60, [Parameter(HelpMessage = "Specify a short message prefix like 'Starting in")] [string]$Message, [Parameter(ValueFromPipelineByPropertyName)] [ValidateScript({ $_ -gt 8 })] [alias("size")] [int]$FontSize = 48, [Parameter(HelpMessage = "Specify a font style.", ValueFromPipelineByPropertyName)] [ValidateSet("Normal", "Italic", "Oblique")] [alias("style")] [string]$FontStyle = "Normal", [Parameter(HelpMessage = "Specify a font weight.", ValueFromPipelineByPropertyName)] [ValidateSet("Normal", "Bold", "Light")] [alias("weight")] [string]$FontWeight = "Normal", [Parameter(HelpMessage = "Specify a font color like Green or an HTML code like '#FF1257EA'", ValueFromPipelineByPropertyName)] [ValidateNotNullOrEmpty()] [string]$Color = "White", [Parameter(HelpMessage = "Specify a font family.", ValueFromPipelineByPropertyName)] [ValidateNotNullOrEmpty()] [alias("family")] [string]$FontFamily = "Segoi UI", [Parameter(HelpMessage = "Do you want the clock to always be on top?", ValueFromPipelineByPropertyName)] [switch]$OnTop, [Parameter(HelpMessage = "Specify the clock position as an array of left and top values.", ValueFromPipelineByPropertyName)] [ValidateCount(2, 2)] [Int32[]]$Position ) Begin { Write-Verbose "[$((Get-Date).TimeofDay) BEGIN ] Starting $($myinvocation.mycommand)" } #begin Process { Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Validating" if ($IsLinux -OR $isMacOS) { Write-Warning "This command requires a Windows platform." return } if ($global:PSCountDownClock.Running) { Write-Warning "You already have a clock running. You can only have one clock running at a time." $PSCountDownClock Return } if (Test-Path $env:temp\pscountdown-flag.txt) { $msg = @" A running countdown clock has been detected from another PowerShell session: $(Get-Content $env:temp\pscountdown-flag.txt) If this is incorrect, delete $env:temp\pscountdown-flag.txt and try again. "@ Write-Warning $msg $r = Read-Host "Do you want to remove the flag file? Y/N" if ($r -eq 'Y') { Remove-Item $env:temp\pscountdown-flag.txt } else { #bail out Return } } #verify the datetime format Try { [void](Get-Date -Format $DateFormat -ErrorAction Stop) } Catch { Write-Warning "The DateFormat value $DateFormat is not a valid format string. Try something like F,G, or U which are case-sensitive." Return } Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Building a synchronized hashtable" $global:PSCountDownClock = [hashtable]::Synchronized(@{ FontSize = $FontSize FontStyle = $FontStyle FontWeight = $FontWeight Color = $Color FontFamily = $FontFamily OnTop = $OnTop StartingPosition = $Position CurrentPosition = $Null Seconds = $seconds Message = $Message }) Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] $($global:PSCountDownClock | Out-String)" #Run the clock in a runspace $rs = [RunspaceFactory]::CreateRunspace() $rs.ApartmentState = "STA" $rs.ThreadOptions = "ReuseThread" $rs.Open() $global:PSCountDownClock.add("Runspace", $rs) $rs.SessionStateProxy.SetVariable("PSCountDownClock", $global:PSCountDownClock) Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Defining the runspace command" $psCmd = [PowerShell]::Create().AddScript({ Add-Type -AssemblyName PresentationFramework -ErrorAction Stop Add-Type -AssemblyName PresentationCore -ErrorAction Stop Add-Type -AssemblyName WindowsBase -ErrorAction Stop # a private function to stop the clock and clean up Function _QuitClock { $PSCountDownClock.Running = $False $timer.stop() $timer.isenabled = $False $form.close() #define a thread job to clean up the runspace $cmd = { Param([int]$ID) $r = Get-Runspace -Id $id $r.close() $r.dispose() } Start-ThreadJob -ScriptBlock $cmd -ArgumentList $PSCountDownClock.runspace.id #delete the flag file if (Test-Path $env:temp\pscountdown-flag.txt) { Remove-Item $env:temp\pscountdown-flag.txt } } $form = New-Object System.Windows.Window [int]$script:i = $PSCountDownClock.seconds <# some of the form settings are irrelevant because it is transparent but leaving them in the event I need to turn off transparency to debug or troubleshoot #> $form.Title = "PSCountdownClock" $form.Height = 200 $form.Width = 400 $form.SizeToContent = "WidthAndHeight" $form.AllowsTransparency = $True $form.Topmost = $PSCountDownClock.Ontop $form.Background = "Transparent" $form.borderthickness = "1,1,1,1" $form.VerticalAlignment = "top" if ($PSCountDownClock.StartingPosition) { $form.left = $PSCountDownClock.StartingPosition[0] $form.top = $PSCountDownClock.StartingPosition[1] } else { $form.WindowStartupLocation = "CenterScreen" } $form.WindowStyle = "None" $form.ShowInTaskbar = $False #define events #call the private function to stop the clock and clean up $form.Add_MouseRightButtonUp({ _QuitClock }) $form.Add_MouseLeftButtonDown({ $form.DragMove() }) #press + to increase the size and - to decrease #the clock needs to refresh to see the result $form.Add_KeyDown({ switch ($_.key) { { 'Add', 'OemPlus' -contains $_ } { If ( $PSCountDownClock.fontSize -ge 8) { $PSCountDownClock.fontSize++ $form.UpdateLayout() } } { 'Subtract', 'OemMinus' -contains $_ } { If ($PSCountDownClock.FontSize -ge 8) { $PSCountDownClock.FontSize-- $form.UpdateLayout() } } } }) #fail safe to remove flag file $form.Add_Unloaded({ if (Test-Path $env:temp\pscountdown-flag.txt) { Remove-Item $env:temp\pscountdown-flag.txt } }) $stack = New-Object System.Windows.Controls.StackPanel $label = New-Object System.Windows.Controls.label $ts = "{0} {1}" -f $PSCountDownClock.message,(New-TimeSpan -Seconds $script:i).ToString() $label.Content = $ts.Trim() #"Hello World" #Get-Date -Format $PSCountDownClock.DateFormat $label.HorizontalContentAlignment = "Center" $label.Foreground = $PSCountDownClock.Color $label.FontStyle = $PSCountDownClock.FontStyle $label.FontWeight = $PSCountDownClock.FontWeight $label.FontSize = $PSCountDownClock.FontSize $label.FontFamily = $PSCountDownClock.FontFamily $label.VerticalAlignment = "Top" $stack.AddChild($label) $form.AddChild($stack) $timer = New-Object System.Windows.Threading.DispatcherTimer $timer.Interval = [TimeSpan]"0:0:1.00" $timer.Add_Tick({ $script:i-- if ($PSCountDownClock.Running -AND ($script:i -gt 0)) { #set the font to yellow at 20 seconds and red at 10 seconds if ($script:i -le 10) { $label.Foreground = "Red" } elseif ($script:i -le 20) { $label.foreground = "Yellow" } else { $label.Foreground = $PSCountDownClock.Color } $label.FontStyle = $PSCountDownClock.FontStyle $label.FontWeight = $PSCountDownClock.FontWeight $label.FontSize = $PSCountDownClock.FontSize $label.FontFamily = $PSCountDownClock.FontFamily $ts = "{0} {1}" -f $PSCountDownClock.message,(New-TimeSpan -Seconds $script:i).ToString() $label.Content = $ts.Trim() #"Hello World" #Get-Date -Format $PSCountDownClock.DateFormat $form.TopMost = $PSCountDownClock.OnTop $form.UpdateLayout() #$PSCountDownClock.Window = $Form $PSCountDownClock.CurrentPosition = $form.left, $form.top } else { _QuitClock } }) $timer.Start() $PSCountDownClock.Running = $True $PSCountDownClock.Started = Get-Date #Show the clock form [void]$form.ShowDialog() }) $pscmd.runspace = $rs Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Launching the runspace" [void]$pscmd.BeginInvoke() Write-Verbose "[$((Get-Date).TimeofDay) PROCESS] Creating the flag file $env:temp\pscountdown-flag.txt" "[{0}] PSClock started by {1} under PowerShell process id $pid" -f (Get-Date), $env:USERNAME | Out-File -FilePath $env:temp\pscountdown-flag.txt } #process End { Write-Verbose "[$((Get-Date).TimeofDay) END ] Ending $($myinvocation.mycommand)" } #end } #close function |