MainWIndow:

- Property PollReserve removed.
- Buzzer1_DrawButton: Play sound for pressed button.
- Buzzer2_DrawButton: Play sound for pressed button.
- PollBuzzer_Tick(): Query  BuzzerDevices parallel.

BuzzerUI:
- SetBuzzer(): Thread safe for new PollBuzzer_Tick()

Author: gueggel

SJ.Buzzer/Controls/BuzzerUI.cs

@@ -10,7 +10,7 @@
  * @link       https://stefanjahn.de
  *
  * @date       21.05.2021
- * @version    20210524
+ * @version    20210528
  * @license    http://www.gnu.org/copyleft/gpl.html
  * ------------------------------------------------------------------------
  * This program is free software: you can redistribute it and/or modify
@@ -41,6 +41,16 @@ namespace SJ.App.Buzzer.Controls
     /// </summary>
     public partial class BuzzerUI : UserControl
     {
+        #region Delegates
+
+        /// <summary>
+        /// Aufruf von Methoden aus einem anderem Thread heraus.
+        /// </summary>
+        private delegate void CallMethodDelegate();
+
+        #endregion
+
+
         #region Attribute
 
         /// <summary>
@@ -240,17 +250,32 @@ public void SetButton( BuzzerButton buttonColor, bool pressed )
             }
         }
 
+
+
         /// <summary>
-        /// Buzzerknopf ein-/ausscahlten.
+        /// Buzzerknopf ein-/ausschalten.
         /// </summary>
         /// <param name="pressed">True = Gedrueckt</param>
         public void SetBuzzer( bool pressed )
         {
             BuzzerPressed = pressed;
             DrawBuzzer( pnlBuzzer.CreateGraphics() );
-            pnlBuzzer.Refresh();
+
+            if( pnlBuzzer.InvokeRequired )
+            {
+                Invoke( new CallMethodDelegate( PollBuzzer ) );
+            }
+            else
+            {
+                pnlBuzzer.Refresh();
+            }
         }
 
+        /// <summary>
+        /// Grafik Buzzerknopf aktualisieren.
+        /// </summary>
+        private void PollBuzzer() => pnlBuzzer.Refresh();
+
         /// <summary>
         /// Button-Objekt abfragen.
         /// </summary>

SJ.Buzzer/Forms/MainWindow.cs

@@ -32,6 +32,7 @@
 using System.Collections.Generic;
 using System.Drawing;
 using System.Threading;
+using System.Threading.Tasks;
 using System.Windows.Forms;
 
 using SharpDX.XAudio2;
@@ -63,10 +64,7 @@ public partial class MainWindow : Form
         /// </summary>
         private XAudio2 AudioDevice
         {
-            get
-            {
-                return _AudioDevice;
-            }
+            get => _AudioDevice;
             set
             {
                 _AudioDevice = value;
@@ -124,16 +122,6 @@ private Dictionary<BuzzerNumber, BuzzerUI> ListBuzzer2UI
             set;
         }
 
-        /// <summary>
-        /// True = Buzzer in verkehrter Reihenfolge abfragen.
-        /// </summary>
-        private bool PollReverse
-        {
-            get;
-            set;
-        }
-
-
         /// <summary>
         /// Timer fuer die Abfrage des Buzzers.
         /// </summary>
@@ -238,8 +226,6 @@ public MainWindow()
                 BuzzerNumber.Four
             };
 
-
-            PollReverse = false;
             LastWindowState = WindowState;
             SetLanguage = string.Empty;
 
@@ -1127,6 +1113,16 @@ private void ChangeLanguage( string language )
         /// <param name="buttonFound">True = Erster Button eines Buzzers wurde gedrueckt</param>
         private void Buzzer1_DrawButton( object sender, BuzzerNumber buzzerNumber, BuzzerButton buzzerButton, bool isPressed, bool buzzerFound, bool buttonFound )
         {
+            if( buzzerFound )
+            {
+                ListSounds[Soundfile.BuzzerPressed].Play();
+            }
+
+            if( buttonFound )
+            {
+                ListSounds[Soundfile.ButtonClick].Play();
+            }
+
             if( buzzerButton == BuzzerButton.Buzzer )
             {
                 ListBuzzer1UI[buzzerNumber].SetBuzzer( isPressed );
@@ -1137,7 +1133,6 @@ private void Buzzer1_DrawButton( object sender, BuzzerNumber buzzerNumber, Buzze
             }
         }
 
-
         /// <summary>
         /// Button auf dem Buzzer #2 zeichnen.
         /// </summary>
@@ -1149,6 +1144,16 @@ private void Buzzer1_DrawButton( object sender, BuzzerNumber buzzerNumber, Buzze
         /// <param name="buttonFound">True = Erster Button eines Buzzers wurde gedrueckt</param>
         private void Buzzer2_DrawButton( object sender, BuzzerNumber buzzerNumber, BuzzerButton buzzerButton, bool isPressed, bool buzzerFound, bool buttonFound )
         {
+            if( buzzerFound )
+            {
+                ListSounds[Soundfile.BuzzerPressed].Play();
+            }
+
+            if( buttonFound )
+            {
+                ListSounds[Soundfile.ButtonClick].Play();
+            }
+
             if( buzzerButton == BuzzerButton.Buzzer )
             {
                 ListBuzzer2UI[buzzerNumber].SetBuzzer( isPressed );
@@ -1175,21 +1180,10 @@ private void Buzzer2_DrawButton( object sender, BuzzerNumber buzzerNumber, Buzze
         /// <summary>
         /// Buzzer abfragen.
         /// </summary>
-        private void PollBuzzer_Tick( object sender, EventArgs e )
-        {
-            if( PollReverse )
-            {
-                BuzzerDevice2.Poll();
-                BuzzerDevice1.Poll();
-            }
-            else
-            {
-                BuzzerDevice1.Poll();
-                BuzzerDevice2.Poll();
-            }
-
-            PollReverse = !PollReverse;
-        }
+        private void PollBuzzer_Tick( object sender, EventArgs e ) => Parallel.Invoke(
+                () => BuzzerDevice1.Poll(),
+                () => BuzzerDevice2.Poll()
+                );
 
 
         /// <summary>