From 08018d27a1fea15ec011732e03d805ee5617b3b4 Mon Sep 17 00:00:00 2001
From: Travis Nickles <ryochan7@protonmail.com>
Date: Sat, 14 Mar 2020 15:34:59 -0500
Subject: [PATCH] Added wait event to use for refreshing controller readings

Only display state change when device is waiting for new report
---
 DS4Windows/DS4Forms/ControllerReadingsControl.xaml.cs | 3 +++
 DS4Windows/DS4Library/DS4Device.cs                    | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/DS4Windows/DS4Forms/ControllerReadingsControl.xaml.cs b/DS4Windows/DS4Forms/ControllerReadingsControl.xaml.cs
index 4016306..85dd38f 100644
--- a/DS4Windows/DS4Forms/ControllerReadingsControl.xaml.cs
+++ b/DS4Windows/DS4Forms/ControllerReadingsControl.xaml.cs
@@ -183,6 +183,8 @@ namespace DS4WinWPF.DS4Forms
 
                 Dispatcher.Invoke(() =>
                 {
+                    ds.ReadWaitEv.Wait();
+                    ds.ReadWaitEv.Reset();
                     int x = baseState.LX;
                     int y = baseState.LY;
 
@@ -272,6 +274,7 @@ namespace DS4WinWPF.DS4Forms
                     }
 
                     prevWarnMode = warnMode;
+                    ds.ReadWaitEv.Set();
                 });
             }
 
diff --git a/DS4Windows/DS4Library/DS4Device.cs b/DS4Windows/DS4Library/DS4Device.cs
index f9e3052..5ebc571 100644
--- a/DS4Windows/DS4Library/DS4Device.cs
+++ b/DS4Windows/DS4Library/DS4Device.cs
@@ -429,6 +429,9 @@ namespace DS4Windows
             return runCalib;
         }
 
+        private ManualResetEventSlim readWaitEv = new ManualResetEventSlim();
+        public ManualResetEventSlim ReadWaitEv { get => readWaitEv; }
+
         public DS4Device(HidDevice hidDevice, string disName)
         {
             hDevice = hidDevice;
@@ -809,6 +812,8 @@ namespace DS4Windows
                     //Latency = latencyQueue.Average();
                     Latency = latencySum / tempLatencyCount;
 
+                    readWaitEv.Set();
+
                     if (conType == ConnectionType.BT)
                     {
                         //HidDevice.ReadStatus res = hDevice.ReadFile(btInputReport);
@@ -893,6 +898,9 @@ namespace DS4Windows
                         }
                     }
 
+                    readWaitEv.Wait();
+                    readWaitEv.Reset();
+
                     curtime = Stopwatch.GetTimestamp();
                     testelapsed = curtime - oldtime;
                     lastTimeElapsedDouble = testelapsed * (1.0 / Stopwatch.Frequency) * 1000.0;