Up/Down arrows in controller select throws exception when no controller present

The version of LaunchBox you are using
Launchbox 12.6
The version of Windows you are using
Windows 10 Education 21H2 - Build 19044.1466
How often the issue occurs
Reproducible on demand (For me at least).
Steps to reproduce the issue if you are able to reproduce it
(I got an 8bitdo SN30 pro I wanted to use via BT)
1. I launched bigbox, controller didn’t work.
2. I go into the Options → Controllers,
3. I enable controllers. [X]
4. Then I Enabled All controllers. [X]
5. Then I went to select controllers in the third option, and no devices were shown, I click the up arrow and I got these error messages.
The complete error that shows up in LaunchBox, if there is one (with all error text)
(Below in codeblocks for your convenience)

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')

App:     Big Box
Version: 12.6
Type:    System.ArgumentOutOfRangeException
Site:    Void ThrowArgumentOutOfRange_IndexException()
Source:  System.Private.CoreLib

   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.SelectOptionViewModel.OnUp(Boolean held, Boolean onlyUpPressed)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.OnUp(Boolean onlyUpPressed)
   at StatusResolver.FlushBroadcaster(Object , Boolean disposing, StatusResolver )
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.HandleKeyDown(KeyEventArgs e)
   at ValCreator.FlushBroadcaster(Object , KeyEventArgs e, ValCreator )
   at Unbroken.LaunchBox.Windows.BigBox.Views.MainView.CalcProperty(Object param, KeyEventArgs ord)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Recent Log:

   1:15:07 PM Exception

‌

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')

App:     Big Box
Version: 12.6
Type:    System.ArgumentOutOfRangeException
Site:    Void ThrowArgumentOutOfRange_IndexException()
Source:  System.Private.CoreLib

   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.SelectOptionViewModel.OnUp(Boolean held, Boolean onlyUpPressed)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.OnUp(Boolean onlyUpPressed)
   at StatusResolver.FlushBroadcaster(Object , Boolean disposing, StatusResolver )
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.HandleKeyDown(KeyEventArgs e)
   at ValCreator.FlushBroadcaster(Object , KeyEventArgs e, ValCreator )
   at Unbroken.LaunchBox.Windows.BigBox.Views.MainView.CalcProperty(Object param, KeyEventArgs ord)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndKeyboardInputProvider.FilterMessage(IntPtr hwnd, WindowMessage message, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Recent Log:

   1:19:01 PM Exception

‌

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')

App:     Big Box
Version: 12.6
Type:    System.ArgumentOutOfRangeException
Site:    Void ThrowArgumentOutOfRange_IndexException()
Source:  System.Private.CoreLib

   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.SelectOptionViewModel.OnDown(Boolean held, Boolean onlyDownPressed)
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.OnDown(Boolean onlyDownPressed)
   at StatusResolver.FlushBroadcaster(Object , Boolean disposing, StatusResolver )
   at Unbroken.LaunchBox.Windows.BigBox.ViewModels.MainViewModel.HandleKeyDown(KeyEventArgs e)
   at ValCreator.FlushBroadcaster(Object , KeyEventArgs e, ValCreator )
   at Unbroken.LaunchBox.Windows.BigBox.Views.MainView.CalcProperty(Object param, KeyEventArgs ord)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Recent Log:

   1:19:34 PM Exception

I think my computer isn’t seeing my 8bitdo controller as a joystick, but it sees my xbox one as one right now. So when I true the 8bitdo, bigbox has nowhere to iterate to when I hit up/down on the Device screen.

I have a feeling the resolution would be a minor change to the action handler condition (if there’s no controllers, then up/down will not increment/decrement the index), but I’m not 100% how you implemented it So I’ll leave it to the experts.

I moved the bug to “minor” because it’s not really blocking, but it is interrupting / unpleasant UX.

Thanks in advance.

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