332 lines
14 KiB
C#
332 lines
14 KiB
C#
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namespace YALV.Common
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{
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#region #using Directives
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using System;
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using System.Diagnostics;
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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.Input;
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using System.Windows.Media;
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using System.Windows.Media.Animation;
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using System.Windows.Shapes;
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//using Progress;
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#endregion
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/// <summary>
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/// Refs: http://gallery.expression.microsoft.com/en-us/BusyIndicator
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/// </summary>
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public static class BusyIndicatorBehavior
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{
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/// <summary>
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/// Default animation framerate
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/// </summary>
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public static int? FRAMERATE = 30;
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#region Attached Properties
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public static readonly DependencyProperty AddMarginsProperty = DependencyProperty.RegisterAttached("AddMargins", typeof(bool),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(false));
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public static readonly DependencyProperty BusyStateProperty = DependencyProperty.RegisterAttached("BusyState", typeof(bool),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(false, OnBusyStateChanged));
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public static readonly DependencyProperty DimBackgroundProperty = DependencyProperty.RegisterAttached("DimBackground", typeof(bool),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(true,
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OnDimBackgroundChanged));
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public static readonly DependencyProperty DimmerBrushProperty = DependencyProperty.RegisterAttached("DimmerBrush", typeof(Brush),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(Brushes.Black));
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public static readonly DependencyProperty DimmerOpacityProperty = DependencyProperty.RegisterAttached("DimmerOpacity", typeof(double),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(0.35));
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public static readonly DependencyProperty DimTransitionDurationProperty = DependencyProperty.RegisterAttached("DimTransitionDuration",
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typeof(Duration),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(
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new Duration(TimeSpan.FromSeconds(0.0))));
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public static readonly DependencyProperty TargetVisualProperty = DependencyProperty.RegisterAttached("TargetVisual", typeof(UIElement),
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typeof(BusyIndicatorBehavior),
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new UIPropertyMetadata(null));
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public static double GetDimmerOpacity(DependencyObject obj)
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{
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return (double)obj.GetValue(DimmerOpacityProperty);
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}
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public static void SetDimmerOpacity(DependencyObject obj, double value)
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{
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obj.SetValue(DimmerOpacityProperty, value);
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}
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public static bool GetAddMargins(DependencyObject obj)
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{
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return (bool)obj.GetValue(AddMarginsProperty);
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}
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public static void SetAddMargins(DependencyObject obj, bool value)
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{
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obj.SetValue(AddMarginsProperty, value);
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}
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public static Duration GetDimTransitionDuration(DependencyObject obj)
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{
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return (Duration)obj.GetValue(DimTransitionDurationProperty);
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}
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public static void SetDimTransitionDuration(DependencyObject obj, Duration value)
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{
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obj.SetValue(DimTransitionDurationProperty, value);
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}
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public static Brush GetDimmerBrush(DependencyObject obj)
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{
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return (Brush)obj.GetValue(DimmerBrushProperty);
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}
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public static void SetDimmerBrush(DependencyObject obj, Brush value)
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{
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obj.SetValue(DimmerBrushProperty, value);
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}
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public static bool GetDimBackground(DependencyObject obj)
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{
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return (bool)obj.GetValue(DimBackgroundProperty);
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}
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public static void SetDimBackground(DependencyObject obj, bool value)
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{
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obj.SetValue(DimBackgroundProperty, value);
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}
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public static UIElement GetTargetVisual(DependencyObject obj)
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{
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return (UIElement)obj.GetValue(TargetVisualProperty);
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}
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public static void SetTargetVisual(DependencyObject obj, UIElement value)
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{
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obj.SetValue(TargetVisualProperty, value);
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}
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public static bool GetBusyState(DependencyObject obj)
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{
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return (bool)obj.GetValue(BusyStateProperty);
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}
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public static void SetBusyState(DependencyObject obj, bool value)
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{
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obj.SetValue(BusyStateProperty, value);
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}
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#endregion
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#region Implementation
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private static void OnDimBackgroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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bool shouldDimBackground = (bool)e.NewValue;
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bool wasDimmingBackground = (bool)e.OldValue;
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if (shouldDimBackground == wasDimmingBackground)
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{
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return;
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}
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if (!GetBusyState(d))
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{
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return;
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}
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var hostGridObject = (GetTargetVisual(d) ?? d);
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Debug.Assert(hostGridObject != null);
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var hostGrid = hostGridObject as Grid;
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if (hostGrid != null)
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{
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var grid = (Grid)LogicalTreeHelper.FindLogicalNode(hostGrid, "BusyIndicator");
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if (grid != null)
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{
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var dimmer = (Rectangle)LogicalTreeHelper.FindLogicalNode(grid, "Dimmer");
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if (dimmer != null)
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{
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dimmer.Visibility = (shouldDimBackground ? Visibility.Visible : Visibility.Collapsed);
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}
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if (shouldDimBackground)
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{
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//grid.Cursor = Cursors.Wait;
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//grid.ForceCursor = true;
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//InputManager.Current.PreProcessInput += OnPreProcessInput;
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}
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else
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{
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//grid.Cursor = Cursors.Arrow;
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//grid.ForceCursor = false;
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//InputManager.Current.PreProcessInput -= OnPreProcessInput;
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}
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}
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}
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}
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private static void OnBusyStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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bool isBusy = (bool)e.NewValue;
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bool wasBusy = (bool)e.OldValue;
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if (isBusy == wasBusy)
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{
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return;
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}
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var hostGridObject = (GetTargetVisual(d) ?? d);
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Debug.Assert(hostGridObject != null);
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var hostGrid = hostGridObject as Grid;
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if (hostGrid == null)
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{
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throw new InvalidCastException(
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string.Format(
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"The object being attached to must be of type {0}. Try embedding your visual inside a {0} control, and attaching the behavior to the {0} instead.",
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typeof(Grid).Name));
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}
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if (isBusy)
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{
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Debug.Assert(LogicalTreeHelper.FindLogicalNode(hostGrid, "BusyIndicator") == null);
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bool dimBackground = GetDimBackground(d);
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var grid = new Grid
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{
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Name = "BusyIndicator",
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Opacity = 0.0
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};
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if (dimBackground)
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{
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//grid.Cursor = Cursors.Wait;
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//grid.ForceCursor = true;
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//InputManager.Current.PreProcessInput += OnPreProcessInput;
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}
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grid.SetBinding(FrameworkElement.WidthProperty, new Binding("ActualWidth")
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{
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Source = hostGrid
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});
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grid.SetBinding(FrameworkElement.HeightProperty, new Binding("ActualHeight")
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{
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Source = hostGrid
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});
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for (int i = 1; i <= 3; ++i)
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{
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grid.ColumnDefinitions.Add(new ColumnDefinition
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{
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Width = new GridLength(1, GridUnitType.Star)
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});
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grid.RowDefinitions.Add(new RowDefinition
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{
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Height = new GridLength(1, GridUnitType.Star)
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});
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}
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var viewbox = new Viewbox
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{
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Width = 120.0,
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Height = 120.0,
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VerticalAlignment = VerticalAlignment.Center,
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HorizontalAlignment = HorizontalAlignment.Center,
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Stretch = Stretch.Uniform,
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StretchDirection = StretchDirection.Both,
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Child = new CircularProgressBar()
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};
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grid.SetValue(Panel.ZIndexProperty, 1000);
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grid.SetValue(Grid.RowSpanProperty, Math.Max(1, hostGrid.RowDefinitions.Count));
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grid.SetValue(Grid.ColumnSpanProperty, Math.Max(1, hostGrid.ColumnDefinitions.Count));
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if (GetAddMargins(d))
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{
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viewbox.SetValue(Grid.RowProperty, 1);
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viewbox.SetValue(Grid.ColumnProperty, 1);
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}
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else
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{
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viewbox.SetValue(Grid.RowSpanProperty, 3);
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viewbox.SetValue(Grid.ColumnSpanProperty, 3);
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}
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viewbox.SetValue(Panel.ZIndexProperty, 1);
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var dimmer = new Rectangle
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{
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Name = "Dimmer",
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Opacity = GetDimmerOpacity(d),
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Fill = GetDimmerBrush(d),
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Visibility = (dimBackground ? Visibility.Visible : Visibility.Collapsed)
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};
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dimmer.SetValue(Grid.RowSpanProperty, 3);
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dimmer.SetValue(Grid.ColumnSpanProperty, 3);
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dimmer.SetValue(Panel.ZIndexProperty, 0);
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grid.Children.Add(dimmer);
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grid.Children.Add(viewbox);
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DoubleAnimation animation = new DoubleAnimation(1.0, GetDimTransitionDuration(d));
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Timeline.SetDesiredFrameRate(animation, FRAMERATE);
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grid.BeginAnimation(UIElement.OpacityProperty, animation);
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hostGrid.Children.Add(grid);
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}
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else
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{
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var grid = (Grid)LogicalTreeHelper.FindLogicalNode(hostGrid, "BusyIndicator");
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Debug.Assert(grid != null);
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if (grid != null)
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{
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grid.Name = string.Empty;
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var fadeOutAnimation = new DoubleAnimation(0.0, GetDimTransitionDuration(d));
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Timeline.SetDesiredFrameRate(fadeOutAnimation, FRAMERATE);
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fadeOutAnimation.Completed += (sender, args) => OnFadeOutAnimationCompleted(d, hostGrid, grid);
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grid.BeginAnimation(UIElement.OpacityProperty, fadeOutAnimation);
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}
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}
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}
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private static void OnPreProcessInput(object sender, PreProcessInputEventArgs e)
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{
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if (e.StagingItem.Input.Device != null)
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{
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e.Cancel();
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}
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}
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private static void OnFadeOutAnimationCompleted(DependencyObject d, Panel hostGrid, UIElement busyIndicator)
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{
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bool dimBackground = GetDimBackground(d);
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hostGrid.Children.Remove(busyIndicator);
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if (dimBackground)
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{
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InputManager.Current.PreProcessInput -= OnPreProcessInput;
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}
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}
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#endregion
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}
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}
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