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using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
namespace Xamarin.PropertyEditing.Windows
{
internal class EntryPopup
: Popup
{
public static readonly DependencyProperty ContentTemplateProperty = DependencyProperty.Register (
nameof(ContentTemplate), typeof(DataTemplate), typeof(EntryPopup), new PropertyMetadata ((s,e) => ((EntryPopup)s).UpdateContentTemplate()));
public DataTemplate ContentTemplate
{
get { return (DataTemplate)GetValue (ContentTemplateProperty); }
set { SetValue (ContentTemplateProperty, value); }
}
public override void OnApplyTemplate ()
{
base.OnApplyTemplate ();
UpdateContentTemplate();
}
protected override void OnOpened (EventArgs e)
{
base.OnOpened (e);
this.textBox.Focus();
}
protected override void OnClosed (EventArgs e)
{
if (!this.closingFromEscape) {
this.textBox.GetBindingExpression (TextBox.TextProperty)?.UpdateSource();
} else
this.closingFromEscape = false;
base.OnClosed (e);
}
protected override void OnPreviewKeyDown (KeyEventArgs e)
{
if (e.Key == Key.Escape) {
this.closingFromEscape = true;
IsOpen = false;
e.Handled = true;
} else if (e.Key == Key.Enter) {
IsOpen = false;
e.Handled = true;
}
base.OnPreviewKeyDown (e);
}
private TextBox textBox;
private bool closingFromEscape;
private void UpdateContentTemplate()
{
Child = ContentTemplate?.LoadContent() as UIElement;
if (Child == null)
return;
this.textBox = ((FrameworkElement)Child)?.FindName ("entry") as TextBox;
if (this.textBox == null)
throw new InvalidOperationException ("Need an entry TextBox for EntryPopup");
}
}
}
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