47 lines
1.4 KiB
C#
47 lines
1.4 KiB
C#
using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Windows;
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using System.Windows.Controls;
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using Torch.Server.ViewModels;
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namespace Torch.Server.Views;
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public partial class LogViewerControl : UserControl
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{
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private bool _isAutoscrollEnabled = true;
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private readonly List<ScrollViewer> _viewers = new();
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public LogViewerControl()
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{
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InitializeComponent();
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((LogViewerViewModel)DataContext).LogEntries.CollectionChanged += LogEntriesOnCollectionChanged;
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}
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private void LogEntriesOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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if (e.Action != NotifyCollectionChangedAction.Add || !_isAutoscrollEnabled)
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return;
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foreach (var scrollViewer in _viewers)
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{
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scrollViewer.ScrollToEnd();
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}
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}
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private void ScrollViewer_OnScrollChanged(object sender, ScrollChangedEventArgs e)
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{
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var scrollViewer = (ScrollViewer) sender;
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if (e.ExtentHeightChange == 0)
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// ReSharper disable once CompareOfFloatsByEqualityOperator
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_isAutoscrollEnabled = scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight;
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}
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private void ScrollViewer_OnLoaded(object sender, RoutedEventArgs e)
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{
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_viewers.Add((ScrollViewer) sender);
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}
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private void ScrollViewer_OnUnloaded(object sender, RoutedEventArgs e)
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{
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_viewers.Remove((ScrollViewer) sender);
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}
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}
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