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Dependency Property Changed Callbacks

public static DependencyProperty FirstProperty = DependencyProperty.Register(  "First",  typeof(string),  typeof(MyType),  new FrameworkPropertyMetadata(     false,     new PropertyChangedCallback(OnFirstPropertyChanged)));

private static void OnFirstPropertyChanged(   DependencyObject sender, DependencyPropertyChangedEventArgs e) {   PropertyChangedEventHandler h = PropertyChanged;   if (h != null)   {      h(sender, new PropertyChangedEventArgs("Second"));   } }

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Create a Custom Event in C#

Put this in the class that will fire the event:

public event EventHandler OnMyEvent;

private void FireMyEvent(string message, bool isSilly) {    if(OnMyEvent == null) return;    MyCustomEventArgs args = new MyCustomEventArgs(message, isSilly);    OnMyEvent(this, args);

}

This is a custom event args class. Not strictly necessary, but helpful for firing events with custom information.

public class MyCustomEventArgs : EventArgs {    public string Message {get; private set;}    public bool IsSilly {get; private set;}    public MyCustomEventArgs(string msg, bool isSilly)    {       Message = msg;       IsSilly = isSilly;    } } Now you can get listen to that event in another class:

private void ListenToEvent() {    AwesomeObject myObject = new AwesomeObject();    myObject.OnMyEvent += RunThisCodeOnEvent; } void RunThisCodeOnEvent(object sender, EventArgs e) {    var customEventArgs = (MyCustomEventArgs)e;    Debug.WriteLine(customEventArgs.Message); }

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C# Vector class for WinRT (Windows 8.1, Windows Phone 8.1)

You can use the one from Mono. That compiles nicely.

Mono Vector Class

If you want a slightly simpler version, comment out lines 346 - 377, 386-398, 512-593, and 599-627.

This will still require that you also bring over the MathHelper.cs class here MathHelper.cs

You will still need the can get that functionality back by chasing all the math helpers in that project. I think we'll need Matrix, Vector2, Vector3, Vector4 and Quaternion.

This is a part of my project to try to port some awesome Processing sketches from Processing into C#. Stay tuned.

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Add a Custom Event Handler to a User Control

Applies to Windows 8, Windows 8.1, Windows Phone 8.1 (XAML)

In your xaml.cs of your custom user control:

// Fire the event when a button clicks private void Button_Click(object sender, RoutedEventArgs e) {       MyCustomEventArgs arrrg = new MyCustomEventArgs();       arrrg.SomeMessage = "Hello world!";       arrrg.SomeValue =  3.1415926;       OnThingHappened(arrrrg); }

// The thing that fires the event protected virtual void OnThingHappened(MyCustomEventArgs e) {       EventHandler<MyCustomEventArgs> handler = ThingHappened;       if (handler != null)             handler(this, e); }

// The event public event EventHandler<MyCustomEventArgs> ThingHappened;

Outside of the user control class (I usually put mine just below in the same file when I'm just hacking stuff together):

public class MyCustomEventArgs : EventArgs {       public string SomeMessage { get; set; }       public double SomeValue { get; set; } }

How to use:

XAML: <MyUserControl ThingHappened="Thing_EventHander" /> xaml.cs: private void Thing_EventHander(object sender, MyCustomEventArgs e) {       Debug.WriteLine(e.SomeMessage); }

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Cycle Through Colors in Javascript

var fillR = 255; var fillG = 0; var fillB = 0; var increment = 20

function incrementColor() {     if (fillR == 255) {         if (fillB > 0) {             fillB = fillB - increment;             if (fillB < 0) { fillB = 0; }         }         else {             fillG = fillG + increment;             if (fillG > 255) { fillG = 255; }         }     }       if (fillG == 255) {         if (fillR > 0) {             fillR = fillR - increment;             if (fillR < 0) { fillR = 0; }         }         else {             fillB = fillB + increment;             if (fillB > 255) { fillB = 255; }         }     }       if (fillB == 255) {         if (fillG > 0) {             fillG = fillG - increment;             if (fillG < 0) { fillG = 0; }         }         else {             fillR = fillR + increment;             if (fillR > 255) { fillR = 255; }         }     }     var canvas = document.getElementById("myCanvas"),                     context = canvas.getContext("2d");     context.fillStyle = "rgb(" + fillR + "," + fillG + "," + fillB + ")"; }

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Extension for HttpWebRequest.GetResponseAsync in Windows Phone

public static Task<HttpWebResponse> GetResponseAsync(this HttpWebRequest request) {     var taskComplete = new TaskCompletionSource<HttpWebResponse>();     request.BeginGetResponse(asyncResponse =>     {         try         {             HttpWebRequest responseRequest = HttpWebRequest)asyncResponse.AsyncState;            HttpWebResponse someResponse = (HttpWebResponse)responseRequest.EndGetResponse(asyncResponse);            taskComplete.TrySetResult(someResponse);        }         catch (WebException webExc)        {            HttpWebResponse failedResponse = (HttpWebResponse)webExc.Response;            taskComplete.TrySetResult(failedResponse);        }    }, request);    return taskComplete.Task; }

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Extension for HttpWebRequest.GetRequestSteamAsync in Windows Phone

public static Task<Stream> GetRequestStreamAsync(this HttpWebRequest request) {     var taskComplete = new TaskCompletionSource<Stream>();     request.BeginGetRequestStream(ar =>     {         Stream requestStream = request.EndGetRequestStream(ar);         taskComplete.TrySetResult(requestStream);     }, request);     return taskComplete.Task; }

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Create ApplicationBar (Windows Phone)

private void CreateAppBar() { // Basic Application Bar ApplicationBar = new ApplicationBar(); ApplicationBar.Mode = ApplicationBarMode.Default; ApplicationBar.Opacity = 1.0; ApplicationBar.IsVisible = true; ApplicationBar.IsMenuEnabled = true; // Adding a button ApplicationBarIconButton myButton1 = new ApplicationBarIconButton(); myButton1.IconUri = new Uri("/Images/check.png", UriKind.Relative); myButton1.Text = "login"; myButton1.Click += myButton1_Click; ApplicationBar.Buttons.Add(myButton1); // Adding a menu item ApplicationBarMenuItem myMenuItem = new ApplicationBarMenuItem(); myMenuItem.Text = "settings"; myMenuItem.Click += myMenuItem_Click; ApplicationBar.MenuItems.Add(myMenuItem); }