weatherWidget.ps1

# Query Yahoo!Weather to get the results. More can be gleaned than just the forecast.
function getWeather([string]$city, [string]$state){
    $query = "select * from weather.forecast where woeid in (select woeid from geo.places(1) where text='{0}, {1}')"
    $url = "https://query.yahooapis.com/v1/public/yql?q={0}&format=xml&env=store://datatables.org/alltableswithkeys"

    $newQuery = $query -f $city, $state
    $newUrl = $url -f $newQuery

    [xml]$data = Invoke-RestMethod -Uri $newUrl

    return $data.query.results.channel.item.forecast
}

# To be clear this is the worst way possible to do this. I need to dig deeper into data binding.
function makeStacks($reportedWeather){
    $whole = ""
    $c = 0
    $stack = [String]@"
    <StackPanel Orientation="Horizontal" Margin="5,0,0,0">
        <TextBlock Height="20" Width="100" HorizontalAlignment="Center">{0}</TextBlock>
        <TextBlock Height="20" Width="60" HorizontalAlignment="Center">{1}</TextBlock>
        <TextBlock Height="20" Width="60" HorizontalAlignment="Center">{2}</TextBlock>
        <TextBlock Height="20" Width="60" HorizontalAlignment="Center">{3}</TextBlock>
        <TextBlock Height="20" Width="200" HorizontalAlignment="Center">{4}</TextBlock>
    </StackPanel>
"@
    ForEach($row in $reportedWeather)
    {
        $whole += $stack -f $row.date, $row.day, $row.high, $row.low, $row.text
        $c += 1

        if ($c -eq 5) {break}
    }
    
    return $whole
}

# Main widget window code. Our XAML, event listeners, and procedural code all live here.
function weatherWidget([string]$city, [string]$state){
	Add-Type -AssemblyName presentationframework

    $forecast = getWeather -city $city -state $state
    $weatherStacks = makeStacks -reportedWeather $forecast

	$xaml = [xml]@"
	<Window
	    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	    x:Name="Window"
	    Title="Weather Widget"
	    Width="480" Height="200" WindowStyle="ToolWindow">
        <StackPanel HorizontalAlignment="Left">
            <TextBlock Margin="5,5,5,5">$city, $state</TextBlock>
            <StackPanel Orientation="Horizontal" Margin="5,0,0,0">
                <TextBlock Height="20" Width="100" HorizontalAlignment="Center">Date</TextBlock>
                <TextBlock Height="20" Width="60" HorizontalAlignment="Center">Day</TextBlock>
                <TextBlock Height="20" Width="60" HorizontalAlignment="Center">High</TextBlock>
                <TextBlock Height="20" Width="60" HorizontalAlignment="Center">Low</TextBlock>
                <TextBlock Height="20" Width="200" HorizontalAlignment="Center">Forecast</TextBlock>
            </StackPanel>
            $weatherStacks
        </StackPanel>
	</Window>
"@

	$reader = New-Object System.Xml.XmlNodeReader $xaml
	$form = [Windows.Markup.XamlReader]::Load($reader)

    # No mouse needed to close window. Press the ESC key.
    $form.add_KeyDown{
        param([Parameter(Mandatory)][Object]$sender, [Parameter(Mandatory)][Windows.Input.KeyEventArgs]$e)

        if ($e.Key -eq 'Escape')
        {
            $form.Close()
        }
    }

	$form.ShowDialog() | Out-Null
}