file360

Shade.cs (7993B)

---

 using System;
 using System.Linq;
 using System.Windows;
 using Windows.Foundation;
 using Windows.UI;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Media;
 using Windows.UI.Xaml.Media.Animation;
 
 namespace File360
 {
     public class Shade : Grid
     {
         #region Globals and events
 
         private readonly PropertyPath _translatePath = new PropertyPath("(UIElement.RenderTransform).(TranslateTransform.X)");
         private readonly PropertyPath _colorPath = new PropertyPath("(Grid.Background).(SolidColorBrush.Color)");
 
         private readonly TranslateTransform _listFragmentTransform = new TranslateTransform();
         private readonly TranslateTransform _deltaTransform = new TranslateTransform();
         private const int MaxAlpha = 190;
 
         public delegate void DrawerEventHandler(object sender);
         public event DrawerEventHandler DrawerOpened;
         public event DrawerEventHandler DrawerClosed;
 
         private Storyboard _fadeInStoryboard;
         private Storyboard _fadeOutStoryboard;
         private Grid _shadowFragment;
         private Grid _slideFragment;
 
         #endregion
 
         #region Properties
 
         public bool Shadowed { get; set; }
         private PropertyPath TranslatePath
         {
             get { return _translatePath; }
         }
         private PropertyPath ColorPath
         {
             get { return _colorPath; }
         }
 
         #endregion
 
         #region Methods
 
         public Shade()
         {
             Shadowed = false;
         }
 
         public void Shadow(Grid Element)
         {
             _slideFragment = (Grid)Element;
             // Create a shadow element
             _shadowFragment = new Grid
             {
                 Name = "_shadowFragment",
                 Background = new SolidColorBrush(Color.FromArgb(0, 255, 255, 255)),
                 HorizontalAlignment = HorizontalAlignment.Stretch,
                 VerticalAlignment = VerticalAlignment.Stretch,
                 Visibility = Visibility.Collapsed
             };
             _shadowFragment.Tapped += shadowFragment_Tapped;
             _shadowFragment.IsHitTestVisible = false;
 
             // Set ZIndexes
             Canvas.SetZIndex(_shadowFragment, 50);
             Canvas.SetZIndex(_slideFragment, 51);
             Children.Add(_shadowFragment);
 
             // Create a new fadeIn animation storyboard
             _fadeInStoryboard = new Storyboard();
 
             // New double animation
             var doubleAnimation1 = new DoubleAnimation 
             { 
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)), 
                 To = 0 
             };
 
             Storyboard.SetTarget(doubleAnimation1, _slideFragment);
             Storyboard.SetTargetProperty(doubleAnimation1, TranslatePath.Path);
             _fadeInStoryboard.Children.Add(doubleAnimation1);
 
             // New color animation for _shadowFragment
             var colorAnimation1 = new ColorAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = Color.FromArgb(190, 0, 0, 0)
             };
 
             Storyboard.SetTarget(colorAnimation1, _shadowFragment);
             Storyboard.SetTargetProperty(colorAnimation1, ColorPath.Path);
             _fadeInStoryboard.Children.Add(colorAnimation1);
 
             // Create a new fadeOut animation storyboard
             _fadeOutStoryboard = new Storyboard();
 
             // New double animation
             var doubleAnimation2 = new DoubleAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = -_slideFragment.Width - 200
             };
 
             Storyboard.SetTarget(doubleAnimation2, _slideFragment);
             Storyboard.SetTargetProperty(doubleAnimation2, TranslatePath.Path);
             _fadeOutStoryboard.Children.Add(doubleAnimation2);
 
             // New color animation for _shadowFragment
             var colorAnimation2 = new ColorAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = Color.FromArgb(0, 0, 0, 0)
             };
 
             Storyboard.SetTarget(colorAnimation2, _shadowFragment);
             Storyboard.SetTargetProperty(colorAnimation2, ColorPath.Path);
             _fadeOutStoryboard.Children.Add(colorAnimation2);
 
         }
 
         public void UnShadow()
         {
             var shadow = new Storyboard();
 
             var doubleAnimation = new DoubleAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = -_slideFragment.Width
             };
 
             Storyboard.SetTarget(doubleAnimation, _slideFragment);
             Storyboard.SetTargetProperty(doubleAnimation, TranslatePath.Path);
             shadow.Children.Add(doubleAnimation);
 
             var colorAnimation = new ColorAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = Color.FromArgb(0, 0, 0, 0)
             };
 
             Storyboard.SetTarget(colorAnimation, _shadowFragment);
             Storyboard.SetTargetProperty(colorAnimation, ColorPath.Path);
             shadow.Children.Add(colorAnimation);
 
             shadow.Completed += shadow_Completed;
             shadow.Begin();
         }
         private void shadowFragment_Tapped(object sender, TappedRoutedEventArgs e)
         {
             var shadow = new Storyboard();
 
             var doubleAnimation = new DoubleAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = -_slideFragment.Width
             };
 
             Storyboard.SetTarget(doubleAnimation, _slideFragment);
             Storyboard.SetTargetProperty(doubleAnimation, TranslatePath.Path);
             shadow.Children.Add(doubleAnimation);
 
             var colorAnimation = new ColorAnimation
             {
                 Duration = new Duration(new TimeSpan(0, 0, 0, 0, 200)),
                 To = Color.FromArgb(0, 0, 0, 0)
             };
 
             Storyboard.SetTarget(colorAnimation, _shadowFragment);
             Storyboard.SetTargetProperty(colorAnimation, ColorPath.Path);
             shadow.Children.Add(colorAnimation);
 
             shadow.Completed += shadow_Completed;
             shadow.Begin();
         }
         private void shadow_Completed(object sender, object e)
         {
             _shadowFragment.IsHitTestVisible = false;
             _shadowFragment.Visibility = Visibility.Collapsed;
             Shadowed = false;
 
             // raise close event
             if (DrawerClosed != null) DrawerClosed(this);
         }
         private void fadeOutStoryboard_Completed(object sender, object e)
         {
             _shadowFragment.Visibility = Visibility.Collapsed;
             Shadowed = false;
             if (DrawerClosed != null) DrawerClosed(this);
         }
         #region MoveShadow
         private void MoveShadowFragment(double left)
         {
             // Show shadow fragment
             _shadowFragment.Background = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255));
             _shadowFragment.Visibility = Visibility.Visible;
 
             // Set bg color based on current _slideFragment position.
             var maxLeft = _slideFragment.ActualWidth;
             var currentLeft = maxLeft - left;
 
             var temp = Convert.ToInt32((currentLeft / maxLeft) * MaxAlpha);
 
             // Limit temp variable to 190 to avoid OverflowException
             if (temp > MaxAlpha) temp = MaxAlpha;
 
             byte alphaColorIndex;
             try
             {
                 alphaColorIndex = Convert.ToByte(MaxAlpha - temp);
             }
             catch
             {
                 alphaColorIndex = 0;
             }
 
             _shadowFragment.Background = new SolidColorBrush(Color.FromArgb(alphaColorIndex, 0, 0, 0));
         }
         #endregion
         #endregion
     }
 }