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8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Media;
namespace Microsoft.Management.UI.Internal
{
/// <content>
/// Partial class implementation for DismissiblePopup control.
/// </content>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.MSInternal", "CA903:InternalNamespaceShouldNotContainPublicTypes")]
public partial class DismissiblePopup : Popup
{
/// <summary>
/// Constructs an instance of DismissablePopup.
/// </summary>
public DismissiblePopup() : base()
{
// nothing
}
private delegate void FocusChildDelegate();
/// <summary>
/// Responds to the condition in which the value of the IsOpen property changes from false to true.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnOpened(EventArgs e)
{
base.OnOpened(e);
if (this.FocusChildOnOpen)
{
this.Dispatcher.BeginInvoke(
System.Windows.Threading.DispatcherPriority.Loaded,
new FocusChildDelegate(this.FocusChild));
}
this.SetupAutomationIdBinding();
}
/// <summary>
/// Responds when the value of the IsOpen property changes from to true to false.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnClosed(EventArgs e)
{
base.OnClosed(e);
if (this.SetFocusOnClose)
{
// Find a control to set focus on.
if (this.SetFocusOnCloseElement != null)
{
// The focus target is set explicitly.
this.SetFocus(this.SetFocusOnCloseElement);
}
else if (this.PlacementTarget != null)
{
// Use PlacementTarget as a first chance option.
this.SetFocus(this.PlacementTarget);
}
else
{
// Use parent UIObject when neither FocusOnCloseTarget nor PlacementTarget is set.
UIElement parent = this.Parent as UIElement;
if (parent != null)
{
this.SetFocus(parent);
}
}
}
}
private void SetFocus(UIElement element)
{
if (element.Focusable)
{
element.Focus();
}
else
{
element.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
}
private void SetupAutomationIdBinding()
{
var popupRoot = this.FindPopupRoot();
var binding = new Binding();
binding.Source = this;
binding.Path = new PropertyPath(AutomationProperties.AutomationIdProperty);
popupRoot.SetBinding(AutomationProperties.AutomationIdProperty, binding);
}
private FrameworkElement FindPopupRoot()
{
DependencyObject element = this.Child;
while (element.GetType().Name.Equals("PopupRoot", StringComparison.Ordinal) == false)
{
element = VisualTreeHelper.GetParent(element);
}
Debug.Assert(element != null, "element not null");
return (FrameworkElement)element;
}
/// <summary>
/// Provides class handling for the KeyDown routed event that occurs when the user presses a key while this control has focus.
/// </summary>
/// <param name="e">The event data.</param>
protected override void OnKeyDown(System.Windows.Input.KeyEventArgs e)
{
////
// Close the popup if ESC is pressed
////
if (e.Key == System.Windows.Input.Key.Escape && this.CloseOnEscape)
{
this.IsOpen = false;
}
else
{
base.OnKeyDown(e);
}
}
partial void OnDismissPopupExecutedImplementation(ExecutedRoutedEventArgs e)
{
this.IsOpen = false;
}
private void FocusChild()
{
if (this.Child != null)
{
this.Child.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
}
}
}
}
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