Keyboard shortcuts with WPF and Powershell

Question

In the following code:

Add-Type -AssemblyName PresentationFramework
$window = New-Object Windows.Window
$commonKeyEvents = {
    [System.Windows.Input.KeyEventArgs] $e = $args[1]
    if ($e.Key -eq 'ESC') { $this.close() }
    if ($e.Key -eq 'Ctrl+Q') { $this.close() }
}
$window.add_PreViewKeyDown($commonKeyEvents)
$window.ShowDialog() | Out-Null

the 'Ctrl+Q' part does not work. How could I make this work?

sodawillow · Accepted Answer · 2018-05-24 18:15:03Z

5

Here you are:

Add-Type -AssemblyName PresentationFramework
$window = New-Object Windows.Window

$commonKeyEvents = {
    [System.Windows.Input.KeyEventArgs] $e = $args[1]

    if (($e.Key -eq "Q" -and $e.KeyboardDevice.Modifiers -eq "Ctrl") -or
        ($e.Key -eq "ESC")) {            
        $this.Close()
    }
}

$window.Add_PreViewKeyDown($commonKeyEvents)
$window.ShowDialog() | Out-Null

Simpler:

Add-Type -AssemblyName PresentationFramework
$window = New-Object Windows.Window

$commonKeyEvents = {
    if (($_.Key -eq "Q" -and $_.KeyboardDevice.Modifiers -eq "Ctrl") -or
        ($_.Key -eq "ESC")) {            
        $this.Close()
    }
}

$window.Add_PreViewKeyDown($commonKeyEvents)
$window.ShowDialog() | Out-Null

edited May 24, 2018 at 18:15

answered May 24, 2018 at 17:52

sodawillow

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1 Comment

TNT Over a year ago

Thanks a lot! That's what I've been missing.

f6a4 · Accepted Answer · 2018-05-24 18:13:07Z

0

Add-Type -AssemblyName PresentationFramework
$window = New-Object Windows.Window
$commonKeyEvents = {
    [System.Windows.Input.KeyEventArgs]$e = $args[1]
    if ($e.Key -eq 'Escape') { $this.close() }
    if ([System.Windows.Input.KeyBoard]::Modifiers -eq [System.Windows.Input.ModifierKeys]::Control -and $e.Key -eq 'Q') { $this.close() }
}
$window.add_KeyDown($commonKeyEvents)
$window.ShowDialog() | Out-Null

answered May 24, 2018 at 18:13

f6a4

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1 Comment

TNT Over a year ago

Also not bad. Looks like a direct translation of some c# code I have seen which is not beautiful but works and serves me maybe to learn to translate the common WPF examples.

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