71 lines
2.8 KiB
C#
71 lines
2.8 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Controls;
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using System.Windows.Threading;
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using System.Windows;
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namespace DM_Weight.util
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{
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public static class GridViewExtensions
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{
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#region IsContentCentered
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[Category("Common")]
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[AttachedPropertyBrowsableForType(typeof(GridViewColumn))]
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public static bool GetIsContentCentered(GridViewColumn gridViewColumn)
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{
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return (bool)gridViewColumn.GetValue(IsContentCenteredProperty);
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}
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public static void SetIsContentCentered(GridViewColumn gridViewColumn, bool value)
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{
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gridViewColumn.SetValue(IsContentCenteredProperty, value);
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}
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public static readonly DependencyProperty IsContentCenteredProperty =
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DependencyProperty.RegisterAttached(
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"IsContentCentered",
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typeof(bool), // type
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typeof(GridViewExtensions), // containing type
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new PropertyMetadata(default(bool), OnIsContentCenteredChanged)
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);
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private static void OnIsContentCenteredChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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OnIsContentCenteredChanged((GridViewColumn)d, (bool)e.NewValue);
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}
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private static void OnIsContentCenteredChanged(GridViewColumn gridViewColumn, bool isContentCentered)
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{
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if (isContentCentered == false) { return; }
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// must wait a bit otherwise GridViewColumn.DisplayMemberBinding will not yet be initialized,
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new DispatcherTimer(TimeSpan.FromMilliseconds(100), DispatcherPriority.Normal, OnColumnLoaded, gridViewColumn.Dispatcher)
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{
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Tag = gridViewColumn
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}.Start();
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}
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static void OnColumnLoaded(object sender, EventArgs e)
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{
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var timer = (DispatcherTimer)sender;
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timer.Stop();
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var gridViewColumn = (GridViewColumn)timer.Tag;
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if (gridViewColumn.DisplayMemberBinding == null)
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{
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throw new Exception("Only allowed with DisplayMemberBinding.");
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}
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var textBlockFactory = new FrameworkElementFactory(typeof(TextBlock));
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textBlockFactory.SetBinding(TextBlock.TextProperty, gridViewColumn.DisplayMemberBinding);
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textBlockFactory.SetValue(TextBlock.TextAlignmentProperty, TextAlignment.Center);
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var cellTemplate = new DataTemplate { VisualTree = textBlockFactory };
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gridViewColumn.DisplayMemberBinding = null; // must null, otherwise CellTemplate won't be recognized
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gridViewColumn.CellTemplate = cellTemplate;
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}
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#endregion IsContentCentered
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}
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}
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