winutil/functions/private/Reset-WPFCheckBoxes.ps1

function Reset-WPFCheckBoxes {
    <#

    .SYNOPSIS
        Set winutil checkboxs to match $sync.selected values.
        Should only need to be run if $sync.selected updated outside of UI (i.e. presets or import)

    .PARAMETER doToggles
        Whether or not to set UI toggles. WARNING: they will trigger if altered

    .PARAMETER checkboxfilterpattern
        The Pattern to use when filtering through CheckBoxes, defaults to "**"
        Used to make reset blazingly fast.
    #>

    param (
        [Parameter(position=0)]
        [bool]$doToggles = $false,

        [Parameter(position=1)]
        [string]$checkboxfilterpattern = "**"
    )
    $selectedSet = [System.Collections.Generic.HashSet[string]]::new([string[]]@($sync.selectedApps + $sync.selectedTweaks + $sync.selectedFeatures + $sync.selectedAppx), [StringComparer]::OrdinalIgnoreCase)

    foreach ($syncEntry in $sync.GetEnumerator()) {
        if ($syncEntry.Value -is [System.Windows.Controls.CheckBox] -and $syncEntry.Name -notlike "WPFToggle*" -and $syncEntry.Name -like $checkboxfilterpattern) {
            $checkboxName = $syncEntry.Key
            $sync.$checkboxName.IsChecked = $selectedSet.Contains($checkboxName)
        }
    }

    # Update Installs tab UI values
    $count = $sync.SelectedApps.Count
    $sync.WPFselectedAppsButton.Content = "Selected Apps: $count"
    # On every change, remove all entries inside the Popup Menu. This is done, so we can keep the alphabetical order even if elements are selected in a random way
    $sync.selectedAppsstackPanel.Children.Clear()
    $sync.selectedApps | Foreach-Object { Add-SelectedAppsMenuItem -name $($sync.configs.applicationsHashtable.$_.Content) -key $_ }

    if($doToggles) {
        # Restore toggle switch states from imported config.
        # Only act on toggles that are explicitly listed in the import - toggles absent
        # from the export file were not part of the saved config and should keep whatever
        # state the live system already has (set during UI initialisation via Get-WinUtilToggleStatus).
        $importedToggles = [System.Collections.Generic.HashSet[string]]::new([string[]]@($sync.selectedToggles), [StringComparer]::OrdinalIgnoreCase)
        foreach ($toggle in $sync.GetEnumerator()) {
            if ($toggle.Key -like "WPFToggle*" -and $toggle.Value -is [System.Windows.Controls.CheckBox] -and $importedToggles.Contains($toggle.Key)) {
                $sync[$toggle.Key].IsChecked = $true
            }
            # Toggles not present in the import are intentionally left untouched;
            # their current UI state already reflects the real system state.
        }
    }
}