first commit

2026-09-03 04:45:36 +03:00
commit d5f52cc3d3
1038 changed files with 169579 additions and 0 deletions
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+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace ClassicAssist.UI.Misc
+{
+    internal class ListBoxBehavior
+    {
+        private static readonly Dictionary<ListBox, Capture> Associations = new Dictionary<ListBox, Capture>();
+
+        public static readonly DependencyProperty ScrollOnNewItemProperty =
+            DependencyProperty.RegisterAttached( "ScrollOnNewItem", typeof( bool ), typeof( ListBoxBehavior ),
+                new UIPropertyMetadata( false, OnScrollOnNewItemChanged ) );
+
+        public static bool GetScrollOnNewItem( DependencyObject obj )
+        {
+            return (bool) obj.GetValue( ScrollOnNewItemProperty );
+        }
+
+        public static void SetScrollOnNewItem( DependencyObject obj, bool value )
+        {
+            obj.SetValue( ScrollOnNewItemProperty, value );
+        }
+
+        public static void OnScrollOnNewItemChanged( DependencyObject d, DependencyPropertyChangedEventArgs e )
+        {
+            ListBox listBox = d as ListBox;
+
+            if ( listBox == null )
+            {
+                return;
+            }
+
+            bool oldValue = (bool) e.OldValue, newValue = (bool) e.NewValue;
+
+            if ( newValue == oldValue )
+            {
+                return;
+            }
+
+            if ( newValue )
+            {
+                listBox.Loaded += ListBox_Loaded;
+                listBox.Unloaded += ListBox_Unloaded;
+                PropertyDescriptor itemsSourcePropertyDescriptor =
+                    TypeDescriptor.GetProperties( listBox )["ItemsSource"];
+                itemsSourcePropertyDescriptor.AddValueChanged( listBox, ListBox_ItemsSourceChanged );
+            }
+            else
+            {
+                listBox.Loaded -= ListBox_Loaded;
+                listBox.Unloaded -= ListBox_Unloaded;
+
+                if ( Associations.ContainsKey( listBox ) )
+                {
+                    Associations[listBox].Dispose();
+                }
+
+                PropertyDescriptor itemsSourcePropertyDescriptor =
+                    TypeDescriptor.GetProperties( listBox )["ItemsSource"];
+                itemsSourcePropertyDescriptor.RemoveValueChanged( listBox, ListBox_ItemsSourceChanged );
+            }
+        }
+
+        private static void ListBox_ItemsSourceChanged( object sender, EventArgs e )
+        {
+            ListBox listBox = (ListBox) sender;
+
+            if ( Associations.ContainsKey( listBox ) )
+            {
+                Associations[listBox].Dispose();
+            }
+
+            Associations[listBox] = new Capture( listBox );
+        }
+
+        private static void ListBox_Unloaded( object sender, RoutedEventArgs e )
+        {
+            ListBox listBox = (ListBox) sender;
+
+            if ( Associations.ContainsKey( listBox ) )
+            {
+                Associations[listBox].Dispose();
+            }
+
+            listBox.Unloaded -= ListBox_Unloaded;
+        }
+
+        private static void ListBox_Loaded( object sender, RoutedEventArgs e )
+        {
+            ListBox listBox = (ListBox) sender;
+
+            listBox.Loaded -= ListBox_Loaded;
+            Associations[listBox] = new Capture( listBox );
+        }
+
+        private class Capture : IDisposable
+        {
+            private readonly INotifyCollectionChanged incc;
+            private readonly ListBox listBox;
+
+            public Capture( ListBox listBox )
+            {
+                this.listBox = listBox;
+                incc = listBox.ItemsSource as INotifyCollectionChanged;
+
+                if ( incc != null )
+                {
+                    incc.CollectionChanged += incc_CollectionChanged;
+                }
+            }
+
+            public void Dispose()
+            {
+                if ( incc != null )
+                {
+                    incc.CollectionChanged -= incc_CollectionChanged;
+                }
+            }
+
+            private void incc_CollectionChanged( object sender, NotifyCollectionChangedEventArgs e )
+            {
+                if ( e.Action == NotifyCollectionChangedAction.Add )
+                {
+                    listBox.ScrollIntoView( e.NewItems[0] );
+                    listBox.SelectedItem = e.NewItems[0];
+                }
+            }
+        }
+    }
+
+    public static class AutoScrollBehavior
+    {
+        public static readonly DependencyProperty AutoScrollProperty =
+            DependencyProperty.RegisterAttached( "AutoScroll", typeof( bool ), typeof( AutoScrollBehavior ),
+                new PropertyMetadata( false, AutoScrollPropertyChanged ) );
+
+        public static void AutoScrollPropertyChanged( DependencyObject obj, DependencyPropertyChangedEventArgs args )
+        {
+            ScrollViewer scrollViewer = obj as ScrollViewer;
+
+            if ( scrollViewer != null && (bool) args.NewValue )
+            {
+                scrollViewer.ScrollChanged += ScrollViewer_ScrollChanged;
+                scrollViewer.ScrollToEnd();
+            }
+            else
+            {
+                if ( scrollViewer != null )
+                {
+                    scrollViewer.ScrollChanged -= ScrollViewer_ScrollChanged;
+                }
+            }
+        }
+
+        private static void ScrollViewer_ScrollChanged( object sender, ScrollChangedEventArgs e )
+        {
+            // Only scroll to bottom when the extent changed. Otherwise you can't scroll up
+            if ( e.ExtentHeightChange != 0 )
+            {
+                ScrollViewer scrollViewer = sender as ScrollViewer;
+                scrollViewer?.ScrollToBottom();
+            }
+        }
+
+        public static bool GetAutoScroll( DependencyObject obj )
+        {
+            return (bool) obj.GetValue( AutoScrollProperty );
+        }
+
+        public static void SetAutoScroll( DependencyObject obj, bool value )
+        {
+            obj.SetValue( AutoScrollProperty, value );
+        }
+    }
+}