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-rw-r--r--Juick/Classes/ScrollViewerMonitor.cs64
1 files changed, 0 insertions, 64 deletions
diff --git a/Juick/Classes/ScrollViewerMonitor.cs b/Juick/Classes/ScrollViewerMonitor.cs
deleted file mode 100644
index 4e96797..0000000
--- a/Juick/Classes/ScrollViewerMonitor.cs
+++ /dev/null
@@ -1,64 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Input;
-using System.Windows.Media;
-
-namespace Juick.Classes
-{
- public class ScrollViewerMonitor
- {
- public static DependencyProperty AtEndCommandProperty =
- DependencyProperty.RegisterAttached("AtEndCommand", typeof(ICommand), typeof(ScrollViewerMonitor), new PropertyMetadata(OnAtEndCommandChanged));
-
- public static ICommand GetAtEndCommand(DependencyObject obj)
- {
- return (ICommand)obj.GetValue(AtEndCommandProperty);
- }
-
- public static void SetAtEndCommand(DependencyObject obj, ICommand value)
- {
- obj.SetValue(AtEndCommandProperty, value);
- }
-
- public static void OnAtEndCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
- {
- var element = (FrameworkElement)d;
- if (element != null)
- {
- element.Loaded -= element_Loaded;
- element.Loaded += element_Loaded;
- }
- }
-
- static void element_Loaded(object sender, RoutedEventArgs e)
- {
- var element = (FrameworkElement)sender;
- element.Loaded -= element_Loaded;
- var scrollViewer = (ScrollViewer)element.Parent;
- if (scrollViewer == null)
- {
- throw new InvalidOperationException("ScrollViewer not found.");
- }
-
- var listener = new DependencyPropertyListener();
- listener.Changed += (s, eArgs) =>
- {
- var atBottom = scrollViewer.VerticalOffset >= scrollViewer.ScrollableHeight - scrollViewer.ScrollableHeight/3;
- if (atBottom)
- {
- var atEnd = GetAtEndCommand(element);
- if (atEnd != null && atEnd.CanExecute(null))
- {
- atEnd.Execute(null);
- }
- }
- };
- var binding = new Binding("VerticalOffset") { Source = scrollViewer };
- listener.Attach(scrollViewer, binding);
- }
- }
-}