Gamma Init

app/WindowsDisplayAPI/UnAttachedDisplay.cs

@@ -0,0 +1,80 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace WindowsDisplayAPI
+{
+    /// <summary>
+    ///     Represents a Windows UnAttached Display Device
+    /// </summary>
+    public class UnAttachedDisplay : DisplayDevice
+    {
+        /// <summary>
+        ///     Creates a new UnAttachedDisplay
+        /// </summary>
+        /// <param name="device">The DisplayDevice instance to copy information from</param>
+        protected UnAttachedDisplay(DisplayDevice device)
+            : base(
+                device.DevicePath,
+                device.DeviceName,
+                device.DeviceKey,
+                device.Adapter,
+                device.ScreenName,
+                device.DisplayName,
+                device.IsAvailable,
+                false
+            )
+        {
+        }
+
+        /// <inheritdoc />
+        public override bool IsAvailable
+        {
+            get => base.IsAvailable || !IsValid;
+        }
+
+        /// <inheritdoc />
+        public override bool IsValid
+        {
+            get
+            {
+                return DisplayAdapter.GetDisplayAdapters()
+                    .SelectMany(adapter => adapter.GetDisplayDevices(base.IsAvailable))
+                    .Any(
+                        device => device.DevicePath.Equals(DevicePath) && device.DeviceKey.Equals(DeviceKey)
+                    );
+            }
+        }
+
+        /// <summary>
+        ///     Returns a list of all unattached displays on this machine
+        /// </summary>
+        /// <returns>An enumerable list of UnAttachedDisplay</returns>
+        public static IEnumerable<UnAttachedDisplay> GetUnAttachedDisplays()
+        {
+            return DisplayAdapter.GetDisplayAdapters()
+                .SelectMany(adapter => adapter.GetDisplayDevices(false))
+                .Select(device => new UnAttachedDisplay(device));
+        }
+
+        /// <inheritdoc />
+        public override string ToString()
+        {
+            return IsValid ? $"{GetType().Name}: {DisplayName} ({DeviceName})" : $"{GetType().Name}: Invalid";
+        }
+
+        /// <summary>
+        ///     Returns the corresponding Display device for this unattached display. Only functions when this instance is invalidated
+        ///     due to display attachment.
+        /// </summary>
+        /// <returns></returns>
+        public Display ToDisplay()
+        {
+            return IsValid
+                ? null
+                : Display.GetDisplays()
+                    .FirstOrDefault(
+                        display => display.DevicePath.Equals(DevicePath) && display.DeviceKey.Equals(DeviceKey)
+                    );
+        }
+    }
+}