From 17740b0055264031aff1e0be1260bca56b642be4 Mon Sep 17 00:00:00 2001
From: Bastian Schmidt <batzen@gmx.org>
Date: Sun, 16 Dec 2018 11:50:31 +0100
Subject: [PATCH] Adding automation peer for RibbonGroupBox #647

---
 .../Peers/RibbonControlDataAutomationPeer.cs  |  52 +++++++++
 .../Peers/RibbonGroupBoxAutomationPeer.cs     | 102 ++++++++++++++++++
 Fluent.Ribbon/Controls/RibbonGroupBox.cs      |  10 +-
 3 files changed, 162 insertions(+), 2 deletions(-)
 create mode 100644 Fluent.Ribbon/Automation/Peers/RibbonControlDataAutomationPeer.cs
 create mode 100644 Fluent.Ribbon/Automation/Peers/RibbonGroupBoxAutomationPeer.cs

diff --git a/Fluent.Ribbon/Automation/Peers/RibbonControlDataAutomationPeer.cs b/Fluent.Ribbon/Automation/Peers/RibbonControlDataAutomationPeer.cs
new file mode 100644
index 000000000..efbb268a6
--- /dev/null
+++ b/Fluent.Ribbon/Automation/Peers/RibbonControlDataAutomationPeer.cs
@@ -0,0 +1,52 @@
+namespace Fluent.Automation.Peers
+{
+    using System.Windows.Automation.Peers;
+    using Fluent.Extensions;
+
+    /// <summary>
+    /// Automation peer for ribbon control items.
+    /// </summary>
+    public class RibbonControlDataAutomationPeer : ItemAutomationPeer
+    {
+        /// <summary>
+        /// Creates a new instance.
+        /// </summary>
+        public RibbonControlDataAutomationPeer(object item, ItemsControlAutomationPeer itemsControlPeer)
+            : base(item, itemsControlPeer)
+        {
+        }
+
+        /// <inheritdoc />
+        protected override AutomationControlType GetAutomationControlTypeCore()
+        {
+            return AutomationControlType.ListItem;
+        }
+
+        /// <inheritdoc />
+        protected override string GetClassNameCore()
+        {
+            var wrapperPeer = this.GetWrapperPeer();
+
+            if (wrapperPeer != null)
+            {
+                return wrapperPeer.GetClassName();
+            }
+
+            return string.Empty;
+        }
+
+        /// <inheritdoc />
+        public override object GetPattern(PatternInterface patternInterface)
+        {
+            object result = null;
+            var wrapperPeer = this.GetWrapperPeer();
+
+            if (wrapperPeer != null)
+            {
+                result = wrapperPeer.GetPattern(patternInterface);
+            }
+
+            return result;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Fluent.Ribbon/Automation/Peers/RibbonGroupBoxAutomationPeer.cs b/Fluent.Ribbon/Automation/Peers/RibbonGroupBoxAutomationPeer.cs
new file mode 100644
index 000000000..361e2f321
--- /dev/null
+++ b/Fluent.Ribbon/Automation/Peers/RibbonGroupBoxAutomationPeer.cs
@@ -0,0 +1,102 @@
+namespace Fluent.Automation.Peers
+{
+    using System.Collections.Generic;
+    using System.Runtime.CompilerServices;
+    using System.Windows.Automation;
+    using System.Windows.Automation.Peers;
+    using JetBrains.Annotations;
+
+    /// <summary>
+    /// Automation peer for <see cref="RibbonGroupBox"/>.
+    /// </summary>
+    public class RibbonGroupBoxAutomationPeer : ItemsControlAutomationPeer
+    {
+        private RibbonGroupHeaderAutomationPeer headerPeer;
+
+        private RibbonGroupBox OwningGroup => (RibbonGroupBox)this.Owner;
+
+        private RibbonGroupHeaderAutomationPeer HeaderPeer
+        {
+            get
+            {
+                if (this.headerPeer == null
+                    || !this.headerPeer.Owner.IsDescendantOf(this.OwningGroup))
+                {
+                    if (this.OwningGroup.State == RibbonGroupBoxState.Collapsed)
+                    {
+                        if (this.OwningGroup.DropDownPopup != null)
+                        {
+                            this.headerPeer = new RibbonGroupHeaderAutomationPeer(this.OwningGroup.DropDownPopup);
+                        }
+                    }
+                    else if (this.OwningGroup.Header != null)
+                    {
+                        this.headerPeer = new RibbonGroupHeaderAutomationPeer(this.OwningGroup);
+                    }
+                }
+
+                return this.headerPeer;
+            }
+        }
+
+        /// <summary>
+        /// Creates a new instance.
+        /// </summary>
+        public RibbonGroupBoxAutomationPeer([NotNull] RibbonGroupBox owner)
+            : base(owner)
+        {
+        }
+
+        /// <inheritdoc />
+        protected override List<AutomationPeer> GetChildrenCore()
+        {
+            var list = base.GetChildrenCore();
+
+            if (this.HeaderPeer != null)
+            {
+                if (list == null)
+                {
+                    list = new List<AutomationPeer>(1);
+                }
+
+                list.Add(this.HeaderPeer);
+            }
+
+            return list;
+        }
+
+        /// <inheritdoc />
+        protected override string GetClassNameCore()
+        {
+            return this.Owner.GetType().Name;
+        }
+
+        /// <inheritdoc />
+        public override object GetPattern(PatternInterface patternInterface)
+        {
+            if (patternInterface == PatternInterface.Scroll)
+            {
+                return null;
+            }
+
+            return base.GetPattern(patternInterface);
+        }
+
+        /// <inheritdoc />
+        protected override void SetFocusCore()
+        {
+        }
+
+        /// <inheritdoc />
+        protected override ItemAutomationPeer CreateItemAutomationPeer(object item)
+        {
+            return new RibbonControlDataAutomationPeer(item, this);
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        internal void RaiseExpandCollapseAutomationEvent(bool oldValue, bool newValue)
+        {
+            this.EventsSource?.RaisePropertyChangedEvent(ExpandCollapsePatternIdentifiers.ExpandCollapseStateProperty, oldValue ? ExpandCollapseState.Expanded : ExpandCollapseState.Collapsed, newValue ? ExpandCollapseState.Expanded : ExpandCollapseState.Collapsed);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Fluent.Ribbon/Controls/RibbonGroupBox.cs b/Fluent.Ribbon/Controls/RibbonGroupBox.cs
index 1e7ff55f1..63632de43 100644
--- a/Fluent.Ribbon/Controls/RibbonGroupBox.cs
+++ b/Fluent.Ribbon/Controls/RibbonGroupBox.cs
@@ -7,6 +7,7 @@ namespace Fluent
     using System.ComponentModel;
     using System.Linq;
     using System.Windows;
+    using System.Windows.Automation.Peers;
     using System.Windows.Controls;
     using System.Windows.Controls.Primitives;
     using System.Windows.Data;
@@ -971,9 +972,11 @@ private void OnDialogLauncherButtonClick(object sender, RoutedEventArgs e)
         /// <param name="e">The event data</param>
         private static void OnIsDropDownOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
         {
-            var ribbon = (RibbonGroupBox)d;
+            var groupBox = (RibbonGroupBox)d;
 
-            ribbon.OnIsDropDownOpenChanged();
+            groupBox.OnIsDropDownOpenChanged();
+
+            (UIElementAutomationPeer.FromElement(groupBox) as Fluent.Automation.Peers.RibbonGroupBoxAutomationPeer)?.RaiseExpandCollapseAutomationEvent((bool)e.OldValue, (bool)e.NewValue);
         }
 
         private void OnIsDropDownOpenChanged()
@@ -1154,5 +1157,8 @@ void ILogicalChildSupport.RemoveLogicalChild(object child)
         {
             this.RemoveLogicalChild(child);
         }
+
+        /// <inheritdoc />
+        protected override AutomationPeer OnCreateAutomationPeer() => new Fluent.Automation.Peers.RibbonGroupBoxAutomationPeer(this);
     }
 }
\ No newline at end of file