Bind a tooltip to listbox elements

[owinsloe]

I started messing around with this some time back and thought I would post the working solution here as it looks like others have wanted to do this (There may be later and better solutions but this works fine for me).

First create a MouseMove event on your listbox (my example is on $listbox6) and create code similar to the following.

It's important that Tootip tip object has a global or script scope or the results are a bit awful.

You can mess around with other tooltip properties with delays but I find what's here to be fine.

$listbox6_MouseMove=[System.Windows.Forms.MouseEventHandler]{
$Index = $listbox6.IndexFromPoint($_.X, $_.Y)

# negative index when listbox is empty
if ( $Index -lt 0 ) { return }

$HoverDelay = ( (get-date)-$script:ListboxHoverTime).totalseconds
# Only invoke tooltip if hover delay exceeded or the element has changed
if (($Index -ne $script:ListboxhoverIndex) -or ($HoverDelay -ge 2))
{
# Create the tooltip values
$Item = $ListBox6.Items[$Index]
$Element = $Item.ToString()

$BalloonText = "$Element`n"
#$BalloonText += "Other stuff`n"


if ($script:ToolTip -eq $null)
{
$script:ToolTip = New-Object System.Windows.Forms.ToolTip
}
$ToolTip.InitialDelay = 1000
$ToolTip.SetToolTip($ListBox6, "$balloonText")
}
[int]$script:ListboxhoverIndex=$Index
$script:ListboxHoverTime=get-date
}

[SAPIEN Support Forums]

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Thank you for posting, owinsloe.

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[davidc]

[POST MOVED BY MODERATOR]

You can add a ToolTip control in the designer so that don't have to create it in the script.

The tooltip itself will handle the hovering.

So in the end all you need is:

PowerShell Code

Double-click the code block to select all.

$listbox1_MouseMove=[System.Windows.Forms.MouseEventHandler]{
	#Event Argument: $_ = [System.Windows.Forms.MouseEventArgs]
	#TODO: Place custom script here
	$index = $listbox1.IndexFromPoint($_.Location)
	
	if ($index -ne -1)
	{ $tooltip1.SetToolTip($listbox1, $listbox1.Items[$index].ToString()) }
	else
	{ $tooltip1.SetToolTip($listbox1, "") }
}

You might want to add a script scope variable tracking if the index has changed so that it doesn't keep assigning the same value while you move the mouse on the same list item.

David

[davidc]

For reference, here is the link to the Spotlight article on the ToolTip control:

https://www.sapien.com/blog/2014/01/30/ ... p-control/

David