Getting keypress on a Form in Powershell - powershell

Question

Im trying to make a image viewer in powershell using some windows forms libraries, I can already store the images location inside an array, but now I want it to detect the keys Right and Left to change between the locations inside the array
Here is the code I'm using:
param(
[parameter (Mandatory=$false, position=0, ParameterSetName='url')]
[string]$url = ''
)
Add-Type -AssemblyName 'System.Windows.Forms'
[void][reflection.assembly]::LoadWithPartialName("System.Windows.Forms")
[System.Windows.Forms.Application]::EnableVisualStyles()
Function Load-Images{
param (
[parameter (Mandatory=$true, position=0, ParameterSetName='path')]
$path
)
$screen = [System.Windows.Forms.Screen]::AllScreens
$form = new-object Windows.Forms.Form
$form.Text = "Image Viewer"
$form.Size = New-Object System.Drawing.Size($screen.WorkingArea[0].Width, $screen.WorkingArea[0].Height)
$pictureBox = new-object Windows.Forms.PictureBox
$pictureBox.Size = New-Object System.Drawing.Size($screen.WorkingArea[0].Width, $screen.WorkingArea[0].Height)
$pictureBox.Image = $path
$pictureBox.SizeMode = 'Zoom'
$pictureBox.Anchor = 'Top,Left,Bottom,Right'
$form.controls.add($pictureBox)
$form.Add_Shown( { $form.Activate() } )
$form.ShowDialog()
$img.dispose()
}
if(!$url) {
$dir = Get-Location
$Files = #(Get-ChildItem "$($dir.Path)\*" -Include *.jpg, *.jpeg, *.png)
$maxSize = $Files.Length
Write-Output $maxSize
Write-Output $Files.Fullname
$img = [System.Drawing.Image]::Fromfile((Get-Item $Files.Fullname[0]))
Load-Images -path $img
}

Answer 1

Continuing from my comment. What you are after is not specific to PowerShell at all. It's a UX/UI design/property/event item.
For Example, here is one showing adding and using the property/event setting to watch for defined keypresses. Just run the function, call the function, and hit 'Enter' or 'Esc', or click 'OK' to fire those events.
function Start-CreateForm
{
#Import Assemblies
Add-Type -AssemblyName System.Windows.Forms,
System.Drawing
$Form1 = New-Object System.Windows.Forms.Form
$OKButton = New-Object System.Windows.Forms.Button
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
$Label1 = New-Object System.Windows.Forms.Label
$textBox1 = New-Object System.Windows.Forms.TextBox
$Field1 = ""
# Check for ENTER and ESC presses
$Form1.KeyPreview = $True
$Form1.Add_KeyDown({if ($PSItem.KeyCode -eq "Enter")
{
# if enter, perform click
$OKButton.PerformClick()
}
})
$Form1.Add_KeyDown({if ($PSItem.KeyCode -eq "Escape")
{
# if escape, exit
$Form1.Close()
}
})
# The action on the button
$handler_OK_Button_Click=
{
$Field1 = $textBox1.Text
$Field1
# Returns a message of no data
if ($Field1 -eq "") {[System.Windows.Forms.MessageBox]::Show("You didn't enter anything!", "Data")}
# Returns what they types. You could add your code here
else {[System.Windows.Forms.MessageBox]::Show($Field1, "Data")}
}
$OnLoadForm_StateCorrection=
{
$Form1.WindowState = $InitialFormWindowState
}
# Form Code
$Form1.Name = "Data_Form"
$Form1.Text = "Data Form"
$Form1.MaximizeBox = $false #lock form
$Form1.FormBorderStyle = 'Fixed3D'
# None,FixedDialog,FixedSingle,FixedToolWindow,Sizable,SizableToolWindow
# Icon
$Form1.Icon = [Drawing.Icon]::ExtractAssociatedIcon((Get-Command powershell).Path)
# $NotifyIcon.Icon = [Drawing.Icon]::ExtractAssociatedIcon((Get-Command powershell).Path)
$Form1.DataBindings.DefaultDataSourceUpdateMode = 0
$Form1.StartPosition = "CenterScreen"# moves form to center of screen
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 300 # sets X
$System_Drawing_Size.Height = 150 # sets Y
$Form1.ClientSize = $System_Drawing_Size
$OKButton.Name = "OK_Button"
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 45
$System_Drawing_Size.Height = 23
$OKButton.Size = $System_Drawing_Size
$OKButton.UseVisualStyleBackColor = $True
$OKButton.Text = "OK"
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 30
$System_Drawing_Point.Y = 113
$OKButton.Location = $System_Drawing_Point
$OKButton.DataBindings.DefaultDataSourceUpdateMode = 0
$OKButton.add_Click($handler_OK_Button_Click)
$Form1.Controls.Add($OKButton)
$InitialFormWindowState = $Form1.WindowState
$Form1.add_Load($OnLoadForm_StateCorrection)
$Label1.Location = New-Object System.Drawing.Point(10,20)
$Label1.Size = New-Object System.Drawing.Size(280,20)
$Label1.Text = "Enter data here:"
$Form1.Controls.Add($Label1)
$textBox1.TabIndex = 0 # Places cursor in field
$textBox1.Location = New-Object System.Drawing.Point(10,40)
$textBox1.Size = New-Object System.Drawing.Size(260,20)
$Form1.Controls.Add($textBox1)
$Form1.Topmost = $True # Moves form to top and stays on top
$Form1.Add_Shown({$textBox1.Select()})
# Show Form
$Form1.ShowDialog()
}
For your use case, you just have to use the needed keyboard specifics.