Show a warning if the low FSR threshold is set too low.

smx-config/MainWindow.xaml

@@ -145,8 +145,13 @@ Use if the platform is too sensitive.</clr:String>
                             <Label Margin="5,0,0,0" x:Name="LowerValue" Content="0" Width="30" HorizontalContentAlignment="Right"
                                    HorizontalAlignment="Left" VerticalAlignment="Top"
                             />
+                            <Image x:Name="ThresholdWarning"
+                                   Source="Resources/threshold_warning.png" Width="9" Height="28"
+                                   Margin="10,0,0,0"
+                                   Visibility="Visible"
+                                />
                             <controls:DoubleSlider x:Name="Slider"
-                                Margin="32,5,0,0"
+                                Margin="24,5,0,0"
                                 MinimumDistance="10"
                                 LowerValue="20" UpperValue="35"
                                 VerticalAlignment="Top"
@@ -854,6 +859,14 @@ a panel to activate and deactivate.
                             
 A panel will activate when it reaches the right side of the
 slider, and deactivate when it reaches the left side of the slider.</TextBlock>
+                        <TextBlock x:Name="ThresholdWarningText" DockPanel.Dock="Top" HorizontalAlignment="Center" Margin="0,15,0,0"
+                                   xml:space="preserve"
+                                   TextAlignment="Center"
+                                   Foreground="#F00"
+>Low thresholds above 140 are recommended.  Higher thresholds allow the
+panel to detect releases more quickly.
+                        </TextBlock>
+
 
                         <DockPanel DockPanel.Dock="Bottom"
                                     VerticalAlignment="Bottom" HorizontalAlignment="Stretch" Margin="0,0,5,0">

smx-config/MainWindow.xaml.cs

@@ -182,6 +182,19 @@ namespace smx_config
             RefreshUploadPadText(args);
             RefreshSelectedColorPicker();
 
+            // Show the threshold warning explanation if any panels are showing the threshold warning icon.
+            bool ShowThresholdWarningText = false;
+            foreach(Tuple<int, SMX.SMXConfig> activePad in ActivePad.ActivePads())
+            {
+                SMX.SMXConfig config = activePad.Item2;
+                for(int panelIdx = 0; panelIdx < 9; ++panelIdx)
+                {
+                    if(config.ShowThresholdWarning(panelIdx))
+                        ShowThresholdWarningText = true;
+                }
+            }
+            ThresholdWarningText.Visibility = ShowThresholdWarningText? Visibility.Visible : Visibility.Hidden;
+
             // If a second controller has connected and we're on Both, see if we need to prompt
             // to sync configs.  We only actually need to do this if a controller just connected.
             if(args.ConfigurationChanged)

smx-config/SMX.cs

@@ -112,6 +112,24 @@ namespace SMX
             return masterVersion >= 4 && (configFlags & SMXConfigFlags.PlatformFlags_FSR) != 0;
         }
 
+        // Return true if the low threshold is set too low.
+        //
+        // Higher low threshold values make the panel respond to the panel being released more
+        // quickly.  It shouldn't be set too low.
+        public bool ShowThresholdWarning(int panel)
+        {
+            if(!fsr())
+                return false;
+
+            // Don't show warnings for disabled panels.
+            if(!GetEnabledPanels()[panel])
+                return false;
+
+            int lower = panelSettings[panel].fsrLowThreshold[0];
+            int MinimumRecommendedLowThreshold = 140;
+            return lower < MinimumRecommendedLowThreshold;
+        }
+
         // enabledSensors is a mask of which panels are enabled.  Return this as an array
         // for convenience.
         public bool[] GetEnabledPanels()

smx-config/SMXConfig.csproj

@@ -218,6 +218,9 @@
     <Resource Include="Resources\sensor_right.png" />
     <Resource Include="Resources\sensor_up.png" />
   </ItemGroup>
+  <ItemGroup>
+    <Resource Include="Resources\threshold_warning.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.

smx-config/Widgets.cs

@@ -122,6 +122,7 @@ namespace smx_config
 
         DoubleSlider slider;
         Label LowerLabel, UpperLabel;
+        Image ThresholdWarning;
 
         OnConfigChange onConfigChange;
 
@@ -132,6 +133,7 @@ namespace smx_config
             slider = GetTemplateChild("Slider") as DoubleSlider;
             LowerLabel = GetTemplateChild("LowerValue") as Label;
             UpperLabel = GetTemplateChild("UpperValue") as Label;
+            ThresholdWarning = GetTemplateChild("ThresholdWarning") as Image;
 
             slider.ValueChanged += delegate(DoubleSlider slider) { SaveToConfig(); };
 
@@ -249,6 +251,10 @@ namespace smx_config
                 UpperLabel.Content = upper.ToString();
             }
 
+            int panelIdx = panelNameToIndex[Type];
+            bool ShowThresholdWarning = config.ShowThresholdWarning(panelIdx);
+            ThresholdWarning.Visibility = ShowThresholdWarning? Visibility.Visible:Visibility.Hidden;
+
             RefreshVisibility();
             UpdatingUI = false;
         }