Updated test application for working with MtApi (MT5) version 1.0.10

2026-08-09 17:01:02 +00:00 · 2016-10-17 11:57:54 +03:00
parent 7fec3da7bc
commit a63e628124
9 changed files with 527 additions and 267 deletions
@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace MtApi5TestClient
+{
+    internal class ListBoxBehavior
+    {
+        static readonly Dictionary<ListBox, Capture> Associations =
+               new Dictionary<ListBox, Capture>();
+
+        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 readonly DependencyProperty ScrollOnNewItemProperty =
+            DependencyProperty.RegisterAttached(
+                "ScrollOnNewItem",
+                typeof(bool),
+                typeof(ListBoxBehavior),
+                new UIPropertyMetadata(false, OnScrollOnNewItemChanged));
+
+        public static void OnScrollOnNewItemChanged(
+            DependencyObject d,
+            DependencyPropertyChangedEventArgs e)
+        {
+            var 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;
+                var 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();
+                var itemsSourcePropertyDescriptor = TypeDescriptor.GetProperties(listBox)["ItemsSource"];
+                itemsSourcePropertyDescriptor.RemoveValueChanged(listBox, ListBox_ItemsSourceChanged);
+            }
+        }
+
+        private static void ListBox_ItemsSourceChanged(object sender, EventArgs e)
+        {
+            var listBox = (ListBox)sender;
+            if (Associations.ContainsKey(listBox))
+                Associations[listBox].Dispose();
+            Associations[listBox] = new Capture(listBox);
+        }
+
+        static void ListBox_Unloaded(object sender, RoutedEventArgs e)
+        {
+            var listBox = (ListBox)sender;
+            if (Associations.ContainsKey(listBox))
+                Associations[listBox].Dispose();
+            listBox.Unloaded -= ListBox_Unloaded;
+        }
+
+        static void ListBox_Loaded(object sender, RoutedEventArgs e)
+        {
+            var listBox = (ListBox)sender;
+            var incc = listBox.Items as INotifyCollectionChanged;
+            if (incc == null) return;
+            listBox.Loaded -= ListBox_Loaded;
+            Associations[listBox] = new Capture(listBox);
+        }
+
+        class Capture : IDisposable
+        {
+            private readonly ListBox listBox;
+            private readonly INotifyCollectionChanged incc;
+
+            public Capture(ListBox listBox)
+            {
+                this.listBox = listBox;
+                incc = listBox.ItemsSource as INotifyCollectionChanged;
+                if (incc != null)
+                {
+                    incc.CollectionChanged += incc_CollectionChanged;
+                }
+            }
+
+            void incc_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+            {
+                if (e.Action == NotifyCollectionChangedAction.Add)
+                {
+                    listBox.ScrollIntoView(e.NewItems[0]);
+                    listBox.SelectedItem = e.NewItems[0];
+                }
+            }
+
+            public void Dispose()
+            {
+                if (incc != null)
+                    incc.CollectionChanged -= incc_CollectionChanged;
+            }
+        }
+    }
+
+}