Add telemetry event for measuring time taken to display PT Run (#5201)

* Added LauncherHotkeyEvent

* Split into cold state and warm state events

src/modules/launcher/PowerLauncher.Telemetry/Events/LauncherColdStateHotkeyEvent.cs

@@ -0,0 +1,18 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+using System.Diagnostics.Tracing;
+
+namespace Microsoft.PowerLauncher.Telemetry
+{
+    [EventData]
+    public class LauncherColdStateHotkeyEvent : EventBase, IEvent
+    {
+        public double HotkeyToVisibleTimeMs { get; set; }
+
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServiceUsage;
+    }
+}

src/modules/launcher/PowerLauncher.Telemetry/Events/LauncherWarmStateHotkeyEvent.cs

@@ -0,0 +1,18 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+using System.Diagnostics.Tracing;
+
+namespace Microsoft.PowerLauncher.Telemetry
+{
+    [EventData]
+    public class LauncherWarmStateHotkeyEvent : EventBase, IEvent
+    {
+        public double HotkeyToVisibleTimeMs { get; set; }
+
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServiceUsage;
+    }
+}

src/modules/launcher/PowerLauncher/MainWindow.xaml.cs

@@ -28,6 +28,7 @@ namespace PowerLauncher
         private bool _isTextSetProgrammatically;
         bool _deletePressed = false;
         Timer _firstDeleteTimer = new Timer();
+        bool _coldStateHotkeyPressed = false;
 
         #endregion
 
@@ -371,6 +372,17 @@ namespace PowerLauncher
                 {
                     SearchBox.QueryTextBox.SelectAll();
                 }
+
+                // Log the time taken from pressing the hotkey till launcher is visible as separate events depending on if it's the first hotkey invoke or second
+                if (!_coldStateHotkeyPressed)
+                {
+                    PowerToysTelemetry.Log.WriteEvent(new LauncherColdStateHotkeyEvent() { HotkeyToVisibleTimeMs = _viewModel.GetHotkeyEventTimeMs() });
+                    _coldStateHotkeyPressed = true;
+                }
+                else
+                {
+                    PowerToysTelemetry.Log.WriteEvent(new LauncherWarmStateHotkeyEvent() { HotkeyToVisibleTimeMs = _viewModel.GetHotkeyEventTimeMs() });
+                }
             }
             else
             {

src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs

@@ -46,6 +46,7 @@ namespace PowerLauncher.ViewModel
         private HotkeyManager _hotkeyManager { get; set; }
         private ushort _hotkeyHandle;
         private readonly Internationalization _translator = InternationalizationManager.Instance;
+        private System.Diagnostics.Stopwatch hotkeyTimer = new System.Diagnostics.Stopwatch();
 
         #endregion
 
@@ -618,7 +619,12 @@ namespace PowerLauncher.ViewModel
             {
                 if (!ShouldIgnoreHotkeys())
                 {
+                    // If launcher window was hidden and the hotkey was pressed, start telemetry event
+                    if (MainWindowVisibility != Visibility.Visible)
+                    {
 
+                        StartHotkeyTimer();
+                    }
                     if (_settings.LastQueryMode == LastQueryMode.Empty)
                     {
                         ChangeQueryText(string.Empty);
@@ -811,6 +817,21 @@ namespace PowerLauncher.ViewModel
             GC.SuppressFinalize(this);
         }
 
+        public void StartHotkeyTimer()
+        {
+            hotkeyTimer.Start();
+        }
+
+        public long GetHotkeyEventTimeMs()
+        {
+            hotkeyTimer.Stop();
+            long recordedTime = hotkeyTimer.ElapsedMilliseconds;
+
+            // Reset the stopwatch and return the time elapsed
+            hotkeyTimer.Reset();
+            return recordedTime;
+        }
+
         #endregion
     }
 }