File size: 2,934 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 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 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace Microsoft.Management.UI.Internal
{
/// <summary>
/// Attached property provider to <see cref="TextBlock"/> control.
/// </summary>
[SuppressMessage("Microsoft.MSInternal", "CA903:InternalNamespaceShouldNotContainPublicTypes")]
public static partial class TextBlockService
{
static partial void IsTextTrimmedMonitoringEnabledProperty_PropertyChangedImplementation(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
TextBlock tb = o as TextBlock;
if (tb == null)
{
return;
}
if ((bool)e.OldValue)
{
tb.SizeChanged -= OnTextBlockSizeChanged;
}
else
{
tb.SizeChanged += OnTextBlockSizeChanged;
}
}
private static void OnTextBlockSizeChanged(object sender, SizeChangedEventArgs e)
{
var textBlock = (TextBlock)sender;
UpdateIsTextTrimmed(textBlock);
}
private static void OnTextBlockPropertyChanged(object sender, EventArgs e)
{
var textBlock = (TextBlock)sender;
UpdateIsTextTrimmed(textBlock);
}
private static void UpdateIsTextTrimmed(TextBlock textBlock)
{
Debug.Assert(textBlock != null, "textblock not null");
if (textBlock.TextWrapping != TextWrapping.NoWrap || textBlock.TextTrimming == TextTrimming.None)
{
SetIsTextTrimmed(textBlock, false);
}
else
{
SetIsTextTrimmed(textBlock, CalculateIsTextTrimmed(textBlock));
}
}
private static bool CalculateIsTextTrimmed(TextBlock textBlock)
{
if (!textBlock.IsArrangeValid)
{
return GetIsTextTrimmed(textBlock);
}
Typeface typeface = new Typeface(
textBlock.FontFamily,
textBlock.FontStyle,
textBlock.FontWeight,
textBlock.FontStretch);
#pragma warning disable 612, 618
// FormattedText is used to measure the whole width of the text held up by TextBlock container
FormattedText formattedText = new FormattedText(
textBlock.Text,
System.Threading.Thread.CurrentThread.CurrentCulture,
textBlock.FlowDirection,
typeface,
textBlock.FontSize,
textBlock.Foreground);
#pragma warning restore 612, 618
return formattedText.Width > textBlock.ActualWidth;
}
}
}
|