Toggle Screen Brightness via an icon in System Tray

toggle-screen-brightness-tray.ps1

# Right click to dispose

# Load necessary .NET assembly
Add-Type -AssemblyName System.Windows.Forms

# Define the functions for Get-Brightness, Set-Brightness, and Toggle-Brightness

function Get-Brightness {
	# Create CIM Session
	$namespaceName = "root/wmi"

	# Get the CIM instance
	$instance = Get-CimInstance -Namespace $namespaceName -ClassName WmiMonitorBrightness

	# Print current brightness
	$currentBrightness = $instance.CurrentBrightness
	Write-Output "$currentBrightness"
}

function Set-Brightness ($brightness) {
	$namespaceName = "root/WMI"
	$className = "WmiMonitorBrightnessMethods"

	# Get the CIM instance 
	$instance = Get-CimInstance -Namespace $namespaceName -ClassName $className

	# Invoke the method with arguments
	$methodArgs = @{
		'Brightness' = $brightness  # Desired brightness level
		'Timeout' = 1  # The time period (in seconds) that the parameters should stay in effect.
	}
	Invoke-CimMethod -InputObject $instance -MethodName WmiSetBrightness -Arguments $methodArgs
}

function Toggle-Brightness {
	# If brightness is not at the lowest, set to lowest, otherwise set to original
	if ((Get-Brightness) -eq 0) {
		#Set-Brightness $originalBrightness
		Set-Brightness $Global:originalBrightness
	} else {
		# Save the original brightness
		#$originalBrightness = Get-Brightness
		$Global:originalBrightness = Get-Brightness
		Set-Brightness 0
	}
}

# Create notify icon object
$notifyIcon = New-Object System.Windows.Forms.NotifyIcon 
#$notifyIcon.Icon = $iconPath
$notifyIcon.Icon = [System.Drawing.SystemIcons]::Information
$notifyIcon.Text = "Toggle Brightness"
$notifyIcon.Visible = $true

# Add click event to notify icon
$notifyIcon.add_MouseClick({
    param($sender, $e)

    if ($e.Button -eq [System.Windows.Forms.MouseButtons]::Left) {
        Toggle-Brightness
    } elseif ($e.Button -eq [System.Windows.Forms.MouseButtons]::Right) {
        $notifyIcon.Dispose()
    }
})

# Prevent PowerShell from closing and removing the icon
# Replace with your own condition to exit when appropriate.
while ($true) { Start-Sleep -Seconds 1 }