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101 lines
2.8 KiB
101 lines
2.8 KiB
/*************************************************************************************
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Extended WPF Toolkit
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Copyright (C) 2007-2013 Xceed Software Inc.
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This program is provided to you under the terms of the Microsoft Public
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License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license
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For more features, controls, and fast professional support,
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pick up the Plus Edition at http://xceed.com/wpf_toolkit
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Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
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***********************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows;
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using System.Windows.Controls;
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namespace Xceed.Wpf.Toolkit.PropertyGrid
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{
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public class TrimmedTextBlock : TextBlock
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{
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#region Constructor
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public TrimmedTextBlock()
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{
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this.SizeChanged += this.TrimmedTextBlock_SizeChanged;
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}
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#endregion
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#region IsTextTrimmed Property
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public static readonly DependencyProperty IsTextTrimmedProperty = DependencyProperty.Register( "IsTextTrimmed", typeof( bool ), typeof( TrimmedTextBlock ), new PropertyMetadata( false, OnIsTextTrimmedChanged ) );
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public bool IsTextTrimmed
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{
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get
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{
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return ( bool )GetValue( IsTextTrimmedProperty );
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}
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private set
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{
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SetValue( IsTextTrimmedProperty, value );
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}
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}
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private static void OnIsTextTrimmedChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
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{
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var textBlock = d as TrimmedTextBlock;
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if( textBlock != null )
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{
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textBlock.OnIsTextTrimmedChanged( ( bool )e.OldValue, ( bool )e.NewValue );
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}
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}
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private void OnIsTextTrimmedChanged( bool oldValue, bool newValue )
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{
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this.ToolTip = ( newValue ) ? this.Text : null;
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}
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#endregion
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#region Event Handler
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private void TrimmedTextBlock_SizeChanged(object sender, SizeChangedEventArgs e)
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{
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var textBlock = sender as TextBlock;
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if( textBlock != null )
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{
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this.IsTextTrimmed = this.GetIsTextTrimmed( textBlock );
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}
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}
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#endregion
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#region Private Methods
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private bool GetIsTextTrimmed( TextBlock textBlock )
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{
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if( textBlock == null )
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return false;
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if( textBlock.TextTrimming == TextTrimming.None )
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return false;
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if( textBlock.TextWrapping != TextWrapping.NoWrap )
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return false;
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var textBlockActualWidth = textBlock.ActualWidth;
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textBlock.Measure( new Size( double.MaxValue, double.MaxValue ) );
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var textBlockDesiredWidth = textBlock.DesiredSize.Width;
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return ( textBlockActualWidth < textBlockDesiredWidth );
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}
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#endregion
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}
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}
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