Merge pull request #10275 from AvaloniaUI/progressBar-automationPeer

Add ProgressBarAutomationPeer

src/Avalonia.Controls/Automation/Peers/ProgressBarAutomationPeer.cs

@@ -0,0 +1,62 @@
+using System;
+using Avalonia.Automation.Peers;
+using Avalonia.Automation.Provider;
+using Avalonia.Controls.Primitives;
+
+namespace Avalonia.Controls.Automation.Peers
+{
+    public class ProgressBarAutomationPeer : RangeBaseAutomationPeer, IRangeValueProvider
+    {
+        public ProgressBarAutomationPeer(RangeBase owner) : base(owner)
+        {
+        }
+
+        protected override string GetClassNameCore()
+        {
+            return "ProgressBar";
+        }
+
+        protected override AutomationControlType GetAutomationControlTypeCore()
+        {
+            return AutomationControlType.ProgressBar;
+        }
+
+        /// <summary>
+        /// Request to set the value that this UI element is representing
+        /// </summary>
+        /// <param name="val">Value to set the UI to, as an object</param>
+        /// <returns>true if the UI element was successfully set to the specified value</returns>
+        void IRangeValueProvider.SetValue(double val)
+        {
+            throw new InvalidOperationException("ProgressBar is ReadOnly, value can't be set.");
+        }
+
+        ///<summary>Indicates that the value can only be read, not modified.
+        ///returns True if the control is read-only</summary>
+        bool IRangeValueProvider.IsReadOnly
+        {
+            get
+            {
+                return true;
+            }
+        }
+
+        ///<summary>Value of a Large Change</summary>
+        double IRangeValueProvider.LargeChange
+        {
+            get
+            {
+                return double.NaN;
+            }
+        }
+
+        ///<summary>Value of a Small Change</summary>
+        double IRangeValueProvider.SmallChange
+        {
+            get
+            {
+                return double.NaN;
+            }
+        }
+    }
+}

src/Avalonia.Controls/ProgressBar.cs

@@ -1,4 +1,6 @@
 using System;
+using Avalonia.Automation.Peers;
+using Avalonia.Controls.Automation.Peers;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
 using Avalonia.Data;
@@ -228,6 +230,11 @@ namespace Avalonia.Controls
             UpdateIndicator();
         }
 
+        protected override AutomationPeer OnCreateAutomationPeer()
+        {
+            return new ProgressBarAutomationPeer(this);
+        }
+
         private void UpdateIndicator()
         {
             // Gets the size of the parent indicator container