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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Diagnostics; |
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using System.Text; |
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using System.Windows; |
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using System.Windows.Controls; |
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using System.Windows.Data; |
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using System.Windows.Documents; |
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using System.Windows.Input; |
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using System.Windows.Media; |
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using System.Windows.Media.Imaging; |
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using System.Windows.Media.Animation; |
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using System.Windows.Navigation; |
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using System.Windows.Shapes; |
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using Microsoft.Surface; |
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using Microsoft.Surface.Presentation; |
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using Microsoft.Surface.Presentation.Controls; |
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using System.Windows.Ink; |
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using System.Threading; |
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using System.IO; |
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using System.Xml; |
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using System.Reflection; |
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using System.Xml.Linq; |
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namespace GestureControl |
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{ |
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public class GestureControl : ContentControl |
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{ |
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private double angle = 0; |
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public static readonly DependencyProperty GestureProperty; |
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Thread inProgess; |
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List<SurfaceGesture> _Gestures = new List<SurfaceGesture>(); |
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/// <summary> |
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/// List of pattern readed in the patterns.xml |
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/// </summary> |
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public List<SurfaceGesturePattern> Pattern = new List<SurfaceGesturePattern>(); |
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public String Gesture |
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{ |
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get { return (String)GetValue(GestureControl.GestureProperty); } |
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set { SetValue(GestureControl.GestureProperty, value); } |
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} |
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#region GestureEvent |
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public delegate void GestureRoutedEventHandler(object sender, GestureRoutedEventArgs e); |
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public static readonly RoutedEvent gestureEvent = EventManager.RegisterRoutedEvent("GestureEvent", RoutingStrategy.Bubble, typeof(GestureRoutedEventHandler), typeof(GestureControl)); |
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public event GestureRoutedEventHandler GestureEvent |
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{ |
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add { AddHandler(gestureEvent, value); } |
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remove { RemoveHandler(gestureEvent, value); } |
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} |
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public delegate void RaiseGestureEventCallBack(string gesture); |
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public void RaiseGestureEvent(string gesture) |
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{ |
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if (this.Dispatcher.CheckAccess()) |
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{ |
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try |
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{ |
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GestureRoutedEventArgs newEventArgs = new GestureRoutedEventArgs(GestureControl.gestureEvent, gesture); |
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RaiseEvent(newEventArgs); |
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} |
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catch (Exception e) { } |
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} |
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else |
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{ |
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this.Dispatcher.BeginInvoke(new RaiseGestureEventCallBack(RaiseGestureEvent), gesture); |
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} |
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} |
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#endregion |
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static GestureControl() |
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{ |
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DefaultStyleKeyProperty.OverrideMetadata(typeof(GestureControl), new FrameworkPropertyMetadata(typeof(GestureControl))); |
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GestureControl.GestureProperty = DependencyProperty.Register("Gesture", typeof(String), typeof(GestureControl), |
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new FrameworkPropertyMetadata("None", new PropertyChangedCallback(OnGestureChanged))); |
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} |
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private static void OnGestureChanged(DependencyObject o, DependencyPropertyChangedEventArgs e) |
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{ |
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//Debug.WriteLine("changed", "Gesture"); |
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} |
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protected override void OnInitialized(EventArgs e) |
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{ |
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base.OnInitialized(e); |
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this.InitializeControl(); |
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} |
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protected void InitializeControl() |
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{ |
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base.AddHandler(SurfaceControl.PreviewContactDownEvent, new RoutedEventHandler(AreaDown)); |
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base.AddHandler(SurfaceInkCanvas.StrokeCollectedEvent, new RoutedEventHandler(AreaStrokeCollected)); |
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} |
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// get angle from the first contact of the stroke |
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protected void AreaDown(object source, RoutedEventArgs e) |
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{ |
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ContactEventArgs c = (ContactEventArgs)e; |
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this.angle = c.Contact.GetOrientation(this) - 270; |
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} |
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protected void AreaStrokeCollected(object source, RoutedEventArgs e) |
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{ |
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if (inProgess == null) |
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{ |
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inProgess = new Thread(RunCapture); |
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inProgess.Start(); |
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} |
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else |
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{ |
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inProgess.Abort(); |
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inProgess = null; |
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inProgess = new Thread(RunCapture); |
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inProgess.Start(); |
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} |
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Debug.WriteLine("collected", "Stroke"); |
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System.Windows.Controls.InkCanvasStrokeCollectedEventArgs tmp = e as System.Windows.Controls.InkCanvasStrokeCollectedEventArgs; |
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// Apply a rotation with the angle of the first contact |
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Matrix rot = Matrix.Identity; |
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rot.Rotate(-this.angle); |
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Stroke s = tmp.Stroke; |
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s.Transform(rot, true); |
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// Get a list of point from a Bezier curve |
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StylusPointCollection tmp2 = s.GetBezierStylusPoints(); |
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// Generate a list of SurfaceGesturePoint, just X and Y but can be improve |
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List<SurfaceGesturePoint> pointList = new List<SurfaceGesturePoint>(); |
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foreach (StylusPoint p in tmp2) |
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pointList.Add(new SurfaceGesturePoint { X = p.X, Y = p.Y }); |
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// create the gesture analyser and set the list |
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SurfaceGesture gesture = new SurfaceGesture(pointList, 1); |
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// try to get a pattern from the list, if one, raise a event |
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_Gestures.Add(gesture); |
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SurfaceInkCanvas ink = e.OriginalSource as SurfaceInkCanvas; |
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ink.Strokes.Clear(); |
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} |
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void RunCapture() |
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{ |
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try |
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{ |
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Thread.Sleep(1000); |
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CommonPattern(); |
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string gesture = GetPattern(_Gestures); |
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if (gesture != "None") |
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{ |
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this.RaiseGestureEvent(gesture); |
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} |
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_Gestures.Clear(); |
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inProgess = null; |
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} |
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catch (Exception) |
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{ |
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inProgess = null; |
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} |
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} |
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#region Pattern |
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/// <ary> |
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/// return a String with the recognized pattern, "None" if no pattern |
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/// </summary> |
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/// <returns></returns> |
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public String GetPattern(List<SurfaceGesture> gestures) |
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{ |
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int found = 0; |
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List<SurfaceGesture> tmp = new List<SurfaceGesture>(); |
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foreach (SurfaceGesturePattern p in Pattern) |
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{ |
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if (p.Count == gestures.Count) |
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{ |
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int index = 0; |
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for (index = 0; index < p.Count; index++) |
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{ |
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if (p[index].Count == gestures[index].Count) |
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{ |
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int i; |
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for (i = 0; i < p[index].Count; i++) |
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{ |
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if (gestures[index][i].Direction != p[index][i].Direction) |
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i = p[index].Count + 1; |
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} |
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if (i == p[index].Count) |
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found++; |
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} |
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} |
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if (found == p.Count) |
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return p.Name; |
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} |
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} |
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return "None"; |
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} |
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/// <summary> |
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/// Load know patterns from the Resources/Patterns.xml file |
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/// </summary> |
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private void CommonPattern() |
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{ |
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try |
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{ |
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#region Load Patterns |
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Pattern.Clear(); |
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System.IO.Stream file = Assembly.GetExecutingAssembly().GetManifestResourceStream("GestureControl.Resources.Patterns.xml"); |
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XmlDocument xml = new XmlDocument(); |
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xml.Load(file); |
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XmlElement root = xml.DocumentElement; |
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XmlNodeList nodes = root.SelectNodes("//Pattern"); |
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SurfaceGesturePattern item; |
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foreach (XmlNode nod in nodes) |
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{ |
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string name = nod["Name"].InnerText; |
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if (nod.ChildNodes.Count < 2) |
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continue; |
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item = new SurfaceGesturePattern() { Name = name }; |
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List<XmlNode> childs = new List<XmlNode>(); |
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foreach (XmlNode elt in nod.ChildNodes) |
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if (elt.Name.Equals("Childs")) |
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foreach (XmlNode c in elt.ChildNodes) |
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childs.Add(c); |
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SurfaceGesturePatternItem p; |
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int j = 0; |
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foreach (XmlNode node in childs) |
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{ |
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string childname = node["Name"].InnerText; |
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List<XmlNode> subNodes = new List<XmlNode>(); |
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foreach (XmlNode elt in node.ChildNodes) |
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if (elt.Name.Equals("Directions")) |
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foreach (XmlNode c in elt.ChildNodes) |
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subNodes.Add(c); |
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if (subNodes.Count == 0) |
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continue; |
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p = new SurfaceGesturePatternItem() { Name = childname }; |
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foreach (XmlNode subNode in subNodes) |
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{ |
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switch (subNode.InnerText) |
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{ |
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case "Up": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.UP }); |
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break; |
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case "Down": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.DOWN }); |
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break; |
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case "Left": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.LEFT }); |
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break; |
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case "Right": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.RIGHT }); |
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break; |
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case "DownRight": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.DOWNRIGHT }); |
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break; |
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case "DownLeft": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.DOWNLEFT }); |
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break; |
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case "UpRight": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.UPRIGHT }); |
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break; |
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case "UpLeft": |
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p.Add(new SurfaceGestureVector() { Direction = SurfaceGestureVectorDirection.UPLEFT }); |
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break; |
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default: |
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break; |
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} |
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} |
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item.Add(p); |
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} |
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this.Pattern.Add(item); |
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} |
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#endregion |
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} |
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catch |
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{ |
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throw new Exception("Error loading Patterns.xml"); |
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} |
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} |
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#endregion |
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} |
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} |