From 63625a1cee1920c24e1d8e88265c2d4cfb754432 Mon Sep 17 00:00:00 2001
From: Fefe_du_973 <80718477+Fefedu973@users.noreply.github.com>
Date: Thu, 25 Jul 2024 18:06:12 +0200
Subject: [PATCH] [ColorPicker]Fixed Scrolling through the history in the color
 picker editor with a mouse wheel (#33551)

## Summary of the Pull Request
Fixed Scrolling through the history in the color picker editor with a
mouse wheel

## Detailed Description of the Pull Request / Additional comments
I added a mousewheel event listener on the HistoryColors ListView, then
I added two functions in the ColorEditorView.xaml.cs to handle the
Event, it checks the number of color in the history and handles the
scroll control accordingly
---
 .../ColorPickerUI/Views/ColorEditorView.xaml  |  1 +
 .../Views/ColorEditorView.xaml.cs             | 55 +++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml b/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml
index 490618f5d6..269805aec9 100644
--- a/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml
+++ b/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml
@@ -48,6 +48,7 @@
                 AutomationProperties.Name="{x:Static p:Resources.Color_History}"
                 ItemsSource="{Binding ColorsHistory}"
                 KeyboardNavigation.DirectionalNavigation="Contained"
+                MouseWheel="HistoryColors_OnMouseWheelScroll"
                 ScrollViewer.HorizontalScrollBarVisibility="Auto"
                 SelectedIndex="{Binding SelectedColorIndex}"
                 SelectionMode="Extended"
diff --git a/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml.cs b/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml.cs
index 3d026a0276..a8ef6723e9 100644
--- a/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml.cs
+++ b/src/modules/colorPicker/ColorPickerUI/Views/ColorEditorView.xaml.cs
@@ -5,6 +5,7 @@
 using System.ComponentModel;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Media;
 using ColorPicker.Helpers;
 using ColorPicker.ViewModels;
 
@@ -42,6 +43,60 @@ namespace ColorPicker.Views
             };
         }
 
+        /// <summary>
+        /// Handles the mouse wheel scroll event on the HistoryColors ListView.
+        /// Scrolls the ListView horizontally based on the direction of the mouse wheel scroll.
+        /// </summary>
+        /// <param name="sender">The source of the event.</param>
+        /// <param name="e">The mouse wheel event data.</param>
+        private void HistoryColors_OnMouseWheelScroll(object sender, System.Windows.Input.MouseWheelEventArgs e)
+        {
+            var scrollViewer = FindVisualChild<ScrollViewer>(HistoryColors);
+
+            if (scrollViewer != null)
+            {
+                if (e.Delta > 0)
+                {
+                    scrollViewer.LineLeft();
+                }
+                else
+                {
+                    scrollViewer.LineRight();
+                }
+
+                e.Handled = true;
+            }
+        }
+
+        /// <summary>
+        /// Finds a visual child of a specified type within a given dependency object.
+        /// </summary>
+        /// <typeparam name="T">The type of the child element to find.</typeparam>
+        /// <param name="obj">The parent dependency object.</param>
+        /// <returns>The first child element of the specified type, or null if no such element is found.</returns>
+        private static T FindVisualChild<T>(DependencyObject obj)
+            where T : DependencyObject
+        {
+            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
+            {
+                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
+                if (child != null && child is T tChild)
+                {
+                    return tChild;
+                }
+                else
+                {
+                    T childOfChild = FindVisualChild<T>(child);
+                    if (childOfChild != null)
+                    {
+                        return childOfChild;
+                    }
+                }
+            }
+
+            return null;
+        }
+
         /*
         private void HistoryColors_ItemClick(object sender, ItemClickEventArgs e)
         {