File size: 1,888 Bytes
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 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Diagnostics.CodeAnalysis;
using System.Windows;
using System.Windows.Controls;
namespace Microsoft.Management.UI.Internal
{
/// <content>
/// Partial class implementation for MessageTextBox control.
/// </content>
[SuppressMessage("Microsoft.MSInternal", "CA903:InternalNamespaceShouldNotContainPublicTypes")]
public partial class MessageTextBox : TextBox
{
static partial void StaticConstructorImplementation()
{
TextProperty.OverrideMetadata(
typeof(MessageTextBox),
new FrameworkPropertyMetadata(
string.Empty,
null,
new CoerceValueCallback(OnTextBoxTextCoerce)));
}
#region Non-Public Methods
private void UpdateIsBackgroundTextShown(string text)
{
if (string.IsNullOrEmpty(text) == false && this.IsBackgroundTextShown)
{
this.IsBackgroundTextShown = false;
}
else if (string.IsNullOrEmpty(text) && this.IsBackgroundTextShown == false)
{
this.IsBackgroundTextShown = true;
}
}
private static object OnTextBoxTextCoerce(DependencyObject o, object baseValue)
{
MessageTextBox mtb = (MessageTextBox)o;
mtb.UpdateIsBackgroundTextShown((string)baseValue);
if (baseValue == null)
{
return string.Empty;
}
return baseValue;
}
#endregion Non-Public Methods
}
}
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