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91
Validation/RepositionPopupBehavior.cs
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91
Validation/RepositionPopupBehavior.cs
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using System;
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using System.Windows;
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using System.Windows.Controls.Primitives;
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using System.Windows.Interactivity;
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namespace Common.Wpf.Validation
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{
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/// <summary>
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/// Defines the reposition behavior of a <see cref="Popup"/> control when the window to which it is attached is moved or resized.
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/// </summary>
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/// <remarks>
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/// This solution was influenced by the answers provided by <see href="http://stackoverflow.com/users/262204/nathanaw">NathanAW</see> and
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/// <see href="http://stackoverflow.com/users/718325/jason">Jason</see> to
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/// <see href="http://stackoverflow.com/questions/1600218/how-can-i-move-a-wpf-popup-when-its-anchor-element-moves">this</see> question.
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/// </remarks>
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public class RepositionPopupBehavior : Behavior<Popup>
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{
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#region Protected Methods
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/// <summary>
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/// Called after the behavior is attached to an <see cref="Behavior.AssociatedObject"/>.
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/// </summary>
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protected override void OnAttached()
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{
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base.OnAttached();
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var window = Window.GetWindow(AssociatedObject.PlacementTarget);
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if (window == null) { return; }
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window.LocationChanged += OnLocationChanged;
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window.SizeChanged += OnSizeChanged;
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AssociatedObject.Loaded += AssociatedObject_Loaded;
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}
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void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
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{
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//AssociatedObject.HorizontalOffset = 7;
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//AssociatedObject.VerticalOffset = -AssociatedObject.Height;
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}
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/// <summary>
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/// Called when the behavior is being detached from its <see cref="Behavior.AssociatedObject"/>, but before it has actually occurred.
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/// </summary>
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protected override void OnDetaching()
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{
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base.OnDetaching();
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var window = Window.GetWindow(AssociatedObject.PlacementTarget);
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if (window == null) { return; }
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window.LocationChanged -= OnLocationChanged;
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window.SizeChanged -= OnSizeChanged;
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AssociatedObject.Loaded -= AssociatedObject_Loaded;
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}
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#endregion Protected Methods
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#region Private Methods
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/// <summary>
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/// Handles the <see cref="Window.LocationChanged"/> routed event which occurs when the window's location changes.
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/// </summary>
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/// <param name="sender">
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/// The source of the event.
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/// </param>
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/// <param name="e">
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/// An object that contains the event data.
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/// </param>
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private void OnLocationChanged(object sender, EventArgs e)
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{
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var offset = AssociatedObject.HorizontalOffset;
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AssociatedObject.HorizontalOffset = offset + 1;
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AssociatedObject.HorizontalOffset = offset;
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}
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/// <summary>
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/// Handles the <see cref="Window.SizeChanged"/> routed event which occurs when either then <see cref="Window.ActualHeight"/> or the
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/// <see cref="Window.ActualWidth"/> properties change value.
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/// </summary>
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/// <param name="sender">
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/// The source of the event.
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/// </param>
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/// <param name="e">
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/// An object that contains the event data.
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/// </param>
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private void OnSizeChanged(object sender, SizeChangedEventArgs e)
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{
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var offset = AssociatedObject.HorizontalOffset;
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AssociatedObject.HorizontalOffset = offset + 1;
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AssociatedObject.HorizontalOffset = offset;
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}
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#endregion Private Methods
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}
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}
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86
Validation/ValidationModelBase.cs
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86
Validation/ValidationModelBase.cs
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Runtime.CompilerServices;
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namespace Common.Wpf.Validation
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{
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public class ValidationModelBase : INotifyPropertyChanged, INotifyDataErrorInfo
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{
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#region Property changed
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public event PropertyChangedEventHandler PropertyChanged = delegate { };
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protected void NotifyPropertyChanged(string propertyName)
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{
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PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
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}
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#endregion
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#region Notify data error
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private readonly Dictionary<string, List<string>> _errors = new Dictionary<string, List<string>>();
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public event EventHandler<DataErrorsChangedEventArgs> ErrorsChanged = delegate { };
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// get errors by property
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public IEnumerable GetErrors(string propertyName)
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{
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if (_errors.ContainsKey(propertyName))
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return _errors[propertyName];
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return null;
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}
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// has errors
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public bool HasErrors
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{
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get { return (_errors.Count > 0); }
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}
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// object is valid
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public bool IsValid
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{
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get { return !HasErrors; }
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}
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public void AddError(string error, [CallerMemberName] string propertyName = null)
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{
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if (propertyName == null)
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return;
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// Add error to list
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_errors[propertyName] = new List<string> { error };
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NotifyErrorsChanged(propertyName);
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}
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public void RemoveError([CallerMemberName] string propertyName = null)
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{
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if (propertyName == null)
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return;
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// remove error
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if (_errors.ContainsKey(propertyName))
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_errors.Remove(propertyName);
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NotifyErrorsChanged(propertyName);
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}
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private void NotifyErrorsChanged(string propertyName)
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{
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ErrorsChanged(this, new DataErrorsChangedEventArgs(propertyName));
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}
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#endregion
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protected void SetProperty<T>(ref T propertyValue, T newValue, [CallerMemberName] string propertyName = null)
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{
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if (Equals(propertyValue, newValue))
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return;
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propertyValue = newValue;
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NotifyPropertyChanged(propertyName);
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NotifyErrorsChanged(propertyName);
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}
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}
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}
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93
Validation/ValidationResources.xaml
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93
Validation/ValidationResources.xaml
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<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
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xmlns:validation="clr-namespace:Common.Wpf.Validation">
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<ControlTemplate x:Key="ValidationTemplate">
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<StackPanel Orientation="Horizontal">
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<!-- Defines TextBox outline border and the ToolTipCorner -->
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<Border x:Name="border"
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BorderThickness="1.25"
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BorderBrush="#FFDC000C">
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<Grid>
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<Polygon x:Name="toolTipCorner"
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Grid.ZIndex="2"
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Margin="-1"
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Points="9,9 9,0 0,0"
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Fill="#FFDC000C"
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HorizontalAlignment="Right"
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VerticalAlignment="Top"
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IsHitTestVisible="True" />
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<Polyline Grid.ZIndex="3"
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Points="10,10 0,0"
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Margin="-1"
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HorizontalAlignment="Right"
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StrokeThickness="1.5"
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StrokeEndLineCap="Round"
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StrokeStartLineCap="Round"
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Stroke="White"
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VerticalAlignment="Top"
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IsHitTestVisible="True" />
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<AdornedElementPlaceholder x:Name="adorner" />
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</Grid>
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</Border>
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<!-- Defines the Popup -->
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<Popup x:Name="placard"
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AllowsTransparency="True"
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PopupAnimation="Fade"
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Placement="Top"
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PlacementTarget="{Binding ElementName=toolTipCorner}"
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PlacementRectangle="10,-1,0,0">
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<!-- Used to reposition Popup when dialog moves or resizes -->
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<i:Interaction.Behaviors>
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<validation:RepositionPopupBehavior />
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</i:Interaction.Behaviors>
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<Popup.Style>
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<Style TargetType="{x:Type Popup}">
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<Style.Triggers>
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<!-- Shows Popup when TextBox has focus -->
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<DataTrigger Binding="{Binding ElementName=adorner, Path=AdornedElement.IsFocused}"
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Value="True">
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<Setter Property="IsOpen"
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Value="True" />
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</DataTrigger>
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<!-- Shows Popup when mouse hovers over ToolTipCorner -->
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<DataTrigger Binding="{Binding ElementName=toolTipCorner, Path=IsMouseOver}"
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Value="True">
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<Setter Property="IsOpen"
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Value="True" />
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</DataTrigger>
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<!-- Hides Popup when window is no longer active -->
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<DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=IsActive}"
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Value="False">
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<Setter Property="IsOpen"
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Value="False" />
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</DataTrigger>
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</Style.Triggers>
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</Style>
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</Popup.Style>
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<Border x:Name="errorBorder"
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Background="#FFDC000C"
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Margin="0,0,8,8"
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Opacity="1"
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CornerRadius="4"
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IsHitTestVisible="False"
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MinHeight="24"
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MaxWidth="267">
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<Border.Effect>
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<DropShadowEffect ShadowDepth="4"
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Color="Black"
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Opacity="0.6"
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Direction="315"
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BlurRadius="4" />
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</Border.Effect>
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<!-- ReSharper disable Xaml.BindingWithContextNotResolved -->
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<TextBlock Text="{Binding ElementName=adorner, Path=AdornedElement.(Validation.Errors).CurrentItem.ErrorContent}"
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Foreground="White"
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Margin="8,3,8,3"
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TextWrapping="Wrap" />
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<!-- ReSharper restore Xaml.BindingWithContextNotResolved -->
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</Border>
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</Popup>
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</StackPanel>
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</ControlTemplate>
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</ResourceDictionary>
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