I've made a PowerShell script to show system toast notifications with WinRT and PowerShell. Along the way I learned several interesting things.
First off calling WinRT from PowerShell involves a strange syntax. If you want to use a class you write [-Class-,-Namespace-,ContentType=WindowsRuntime] first to tell PowerShell about the type. For example here I create a ToastNotification object:
[void][Windows.UI.Notifications.ToastNotification,Windows.UI.Notifications,ContentType=WindowsRuntime];
$toast = New-Object Windows.UI.Notifications.ToastNotification -ArgumentList $xml;[void][Windows.UI.Notifications.ToastNotificationManager,Windows.UI.Notifications,ContentType=WindowsRuntime];
$notifier = [Windows.UI.Notifications.ToastNotificationManager]::CreateToastNotifier($AppUserModelId);To handle the user clicking on the toast I need to listen to the Activated event on the Toast object. However Register-ObjectEvent doesn't handle WinRT events. To work around this I created a .NET event wrapper class to turn the WinRT event into a .NET event that Register-ObjectEvent can handle. This is based on Keith Hill's blog post on calling WinRT async methods in PowerShell. With the event wrapper class I can run the following to subscribe to the event:
function WrapToastEvent {
param($target, $eventName);
Add-Type -Path (Join-Path $myPath "PoshWinRT.dll")
$wrapper = new-object "PoshWinRT.EventWrapper[Windows.UI.Notifications.ToastNotification,System.Object]";
$wrapper.Register($target, $eventName);
}
[void](Register-ObjectEvent -InputObject (WrapToastEvent $toast "Activated") -EventName FireEvent -Action {
...
});To handle the Activated event I want to put focus back on the PowerShell window that created the toast. To do this I need to call the Win32 function SetForegroundWindow. Doing so from PowerShell is surprisingly easy. First you must tell PowerShell about the function:
Add-Type @"
using System;
using System.Runtime.InteropServices;
public class PInvoke {
[DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)]
public static extern bool SetForegroundWindow(IntPtr hwnd);
}
"@[PInvoke]::SetForegroundWindow((Get-Process -id $myWindowPid).MainWindowHandle);But figuring out the HWND to give to SetForegroundWindow isn't totally straight forward. Get-Process exposes a MainWindowHandle property but if you start a cmd.exe prompt and then run PowerShell inside of that, the PowerShell process has 0 for its MainWindowHandle property. We must follow up process parents until we find one with a MainWindowHandle:
$myWindowPid = $pid;
while ($myWindowPid -gt 0 -and (Get-Process -id $myWindowPid).MainWindowHandle -eq 0) {
$myWindowPid = (gwmi Win32_Process -filter "processid = $($myWindowPid)" | select ParentProcessId).ParentProcessId;
}
Love it: "Never give your parents a hard time about having to teach
them computer stuff. They had to teach you to use a spoon."
Set of issues run into by children using iPad apps. Should be generally appropriate though:
“Designing apps for children is extremely hard. Not only is quality, age-appropriate content hard to create, but designing the flow and interaction of these apps is made more difficult because designers must refrain from implementing advanced gestures, which would only confuse and frustrate kids (and, by extension, their parents). Yet all apps can and should adhere to certain basics. Hopefully, the four guidelines discussed here can become fixtures of all children’s apps.”
Sarah and I are just back from a successful wedding planning trip to California. We now have cake, food, officiant, makeup, and some other things. Planning weddings is tough. It was also, of course, a pleasure to see my parents who made home made pasta -- yum!
Sarah and I had Thanksgiving dinner at our house the Sunday before.
Sarah's parents and siblings came as well as my parents who came up for the a handful of days. It was our first time hosting Thanksgiving so I was a little nervous, but my parents helped us setup
and get ready so of course it went well! I cheated a bit: I ordered a turkey online from Whole Foods where you can just tell them when you want to pick it up, they have it cooked and ready
including garnish and you just need to warm it up. When we moved in together Sarah and I each had slightly different small dining room tables. Thankfully they're roughly the same height and width
and we could put them together end to end and seat everybody with no room to spare. On actual Thanksgiving day we went over to Rachel & Anson's lovely new place for Thanksgiving and the annual
game of Trivial Pursuit.
My parents visited this past weekend, met Sarah's parents, saw our house, and met our bunny. On Friday we went to BluWater in Kirkland which was pretty busy and the service was slower and slightly worse than we usually find. Saturday my parents helped us with our yard quite a bit and for dinner we went to the Icon Grill with Sarah's parents. I had forgotten how much I enjoy the food at the Icon Grill - I had the very tasty meat loaf. Dinner went well and afterward we stopped at the Three Lions pub in Redmond. On all previous occasions I had tried to go in there the place was packed for a soccer game. This night however there was a man with a guitar, singing and it wasn't nearly as packed. I also found that near the bathrooms on the wall is what looks to be James Bond's jetpack.
On Sunday we went out to see Jeannie and Carl and see the renovations to Jeannie's place. We met up with them at the Fremont Market to which I hadn't been previously, and had a look around there before going back to Jeannie's to see the lovely work they'd done to her place. For dinner my parents took us out to the Melting Pot for my approaching birthday. It was fun having my parents up and I look forward to the next time they're here.
The weekend before last Sarah and I went down to Gas Works Park in Seattle. Gas Works Park is a former Seattle Gas Light Company gasification plant now turned into a
park with the machinery kept intact and found right on the shore of Lake Union. There's a large hill right next to the plant with an embedded art installation from which you get an excellent view
of the park and the lake. Anyway a very cool place. Afer, we ate at Julia's of Wallingford where I stereotypically had the Santa Cruz
omelet. Good food, nice place, nice neighborhood.
This past weekend was Halloween weekend. On Halloween at Microsoft parents bring their kids around the office buildings and collect candy from those who
have candy in their office. See Matt's photo of one such hallway at Microsoft. The next day Sarah and I went to two birthday parties the second of which required costume. I went as House (from the
television show House) by putting on a suit jacket and carrying a cane. Sarah wore scrubs to lend cred. to my lazy costume. Oh yeah and on Sunday Sarah bought a new car.
Sarah and I went down to California at the end of last month for a Thanksgiving visit with my parents. We visited the famous Monterey Bay Aquarium (fun fact: the aquarium scenes in Star Trek IV were filmed here) and saw many jelly fish. We wandered around Capitola where we visited many local
shops and ate on the wharf. We shopped in Carmel and ate at the Forge in the Forest (fun fact: Clint Eastwood was the mayor of this city in the late
80s). We visited the Santa Cruz Beach Boardwalk which was very cold and closed.
My parents took us out to dinner on the first night and the rest of the nights we ate dinner at their house. They had the Shelton's over and I got
to see Chris and Alison. It was fun to talk with them and catch up since its been quite a while since I'd seen them.
We stayed in the lovely beach house of our family friend's the Goodwins.
My parents have been helping them fix it up and decorate it and it looks great. It was quite a treat staying in a house right on the ocean. Also of note, this was the first trip on which I was old
enough to rent the car and accordingly I did all of the driving. This trip was very fun and relaxing.
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