An attached behavior to allow keyboard input in a WPF Popup control.
Finally, a way to dismiss a Popup control using the escape key.
See http://mike-ward.net/blog/post/00863/keyboard-handling-in-wpf-popup-class
An attached behavior to allow keyboard input in a WPF Popup control.
Finally, a way to dismiss a Popup control using the escape key.
See http://mike-ward.net/blog/post/00863/keyboard-handling-in-wpf-popup-class
/* | |
Copyright (C) 2013 Mike Ward (http://mike-ward.net) | |
Permission is hereby granted, free of charge, to any person obtaining a copy of | |
this software and associated documentation files (the "Software"), to deal in | |
the Software without restriction, including without limitation the rights to | |
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
of the Software, and to permit persons to whom the Software is furnished to do | |
so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all | |
copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
SOFTWARE. | |
*/ | |
using System.Windows; | |
using System.Windows.Controls.Primitives; | |
using System.Windows.Input; | |
namespace tweetz5.Controls | |
{ | |
public class PopupAllowKeyboardInput | |
{ | |
public static readonly DependencyProperty IsEnabledProperty = DependencyProperty.RegisterAttached( | |
"IsEnabled", | |
typeof (bool), | |
typeof (PopupAllowKeyboardInput), | |
new PropertyMetadata(default(bool), IsEnabledChanged)); | |
public static bool GetIsEnabled(DependencyObject d) | |
{ | |
return (bool)d.GetValue(IsEnabledProperty); | |
} | |
public static void SetIsEnabled(DependencyObject d, bool value) | |
{ | |
d.SetValue(IsEnabledProperty, value); | |
} | |
private static void IsEnabledChanged(DependencyObject sender, DependencyPropertyChangedEventArgs ea) | |
{ | |
EnableKeyboardInput((Popup)sender, (bool)ea.NewValue); | |
} | |
private static void EnableKeyboardInput(Popup popup, bool enable) | |
{ | |
if (enable) | |
{ | |
IInputElement element = null; | |
popup.Loaded += (sender, args) => | |
{ | |
popup.Child.Focusable = true; | |
popup.Child.IsVisibleChanged += (o, ea) => | |
{ | |
if (popup.Child.IsVisible) | |
{ | |
element = Keyboard.FocusedElement; | |
Keyboard.Focus(popup.Child); | |
} | |
}; | |
}; | |
// ReSharper disable ImplicitlyCapturedClosure | |
popup.Closed += (sender, args) => Keyboard.Focus(element); | |
} | |
} | |
} | |
} |