From de9e93606a2f49458184ccd08bcc34bdee9e8d07 Mon Sep 17 00:00:00 2001
From: madwind <madwind.cn@gmail.com>
Date: Tue, 31 Dec 2024 11:08:32 +0800
Subject: [PATCH] Display position to help set the deadzone.

---
 .../Input/ControllerInputViewModel.cs         | 28 ++++++
 .../UI/Views/Input/ControllerInputView.axaml  | 10 ++-
 .../Views/Input/ControllerInputView.axaml.cs  | 89 ++++++++++++++++++-
 3 files changed, 122 insertions(+), 5 deletions(-)

diff --git a/src/Ryujinx/UI/ViewModels/Input/ControllerInputViewModel.cs b/src/Ryujinx/UI/ViewModels/Input/ControllerInputViewModel.cs
index 6ee79a371..cf99241fe 100644
--- a/src/Ryujinx/UI/ViewModels/Input/ControllerInputViewModel.cs
+++ b/src/Ryujinx/UI/ViewModels/Input/ControllerInputViewModel.cs
@@ -7,6 +7,7 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
     public class ControllerInputViewModel : BaseModel
     {
         private GamepadInputConfig _config;
+
         public GamepadInputConfig Config
         {
             get => _config;
@@ -18,6 +19,7 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
         }
 
         private bool _isLeft;
+
         public bool IsLeft
         {
             get => _isLeft;
@@ -30,6 +32,7 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
         }
 
         private bool _isRight;
+
         public bool IsRight
         {
             get => _isRight;
@@ -44,6 +47,7 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
         public bool HasSides => IsLeft ^ IsRight;
 
         private SvgImage _image;
+
         public SvgImage Image
         {
             get => _image;
@@ -55,6 +59,30 @@ namespace Ryujinx.Ava.UI.ViewModels.Input
         }
 
         public readonly InputViewModel ParentModel;
+        
+        private string _leftStickPosition;
+
+        public string LeftStickPosition
+        {
+            get => _leftStickPosition;
+            set
+            {
+                _leftStickPosition = value;
+                OnPropertyChanged();
+            }
+        }
+
+        private string _rightStickPosition;
+
+        public string RightStickPosition
+        {
+            get => _rightStickPosition;
+            set
+            {
+                _rightStickPosition = value;
+                OnPropertyChanged();
+            }
+        }
 
         public ControllerInputViewModel(InputViewModel model, GamepadInputConfig config)
         {
diff --git a/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml b/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml
index 7daf23eb6..544b1e766 100644
--- a/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml
+++ b/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml
@@ -15,7 +15,9 @@
     x:DataType="viewModels:ControllerInputViewModel"
     x:CompileBindings="True"
     mc:Ignorable="d"
-    Focusable="True">
+    Focusable="True"
+    Unloaded="Control_OnUnloaded"
+    >
     <Design.DataContext>
         <viewModels:ControllerInputViewModel />
     </Design.DataContext>
@@ -183,6 +185,9 @@
                                 <TextBlock
                                     HorizontalAlignment="Center"
                                     Text="{ext:Locale ControllerSettingsStickDeadzone}" />
+                                <TextBlock
+                                    HorizontalAlignment="Center"
+                                    Text="{Binding LeftStickPosition }" />
                                 <StackPanel
                                     HorizontalAlignment="Center"
                                     VerticalAlignment="Center"
@@ -716,6 +721,9 @@
                                 <TextBlock
                                     HorizontalAlignment="Center"
                                     Text="{ext:Locale ControllerSettingsStickDeadzone}" />
+                                <TextBlock
+                                    HorizontalAlignment="Center"
+                                    Text="{Binding RightStickPosition }" />
                                 <StackPanel
                                     HorizontalAlignment="Center"
                                     VerticalAlignment="Center"
diff --git a/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml.cs b/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml.cs
index ee84fbc37..a17876554 100644
--- a/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml.cs
+++ b/src/Ryujinx/UI/Views/Input/ControllerInputView.axaml.cs
@@ -4,14 +4,14 @@ using Avalonia.Controls.Primitives;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.LogicalTree;
-using DiscordRPC;
 using Ryujinx.Ava.UI.Helpers;
 using Ryujinx.Ava.UI.ViewModels.Input;
 using Ryujinx.Common.Configuration.Hid.Controller;
-using Ryujinx.Common.Logging;
 using Ryujinx.Input;
 using Ryujinx.Input.Assigner;
 using System;
+using System.Numerics;
+using System.Threading.Tasks;
 using StickInputId = Ryujinx.Common.Configuration.Hid.Controller.StickInputId;
 
 namespace Ryujinx.Ava.UI.Views.Input
@@ -19,6 +19,7 @@ namespace Ryujinx.Ava.UI.Views.Input
     public partial class ControllerInputView : UserControl
     {
         private ButtonKeyAssigner _currentAssigner;
+        private volatile bool _isRunning = true;
 
         public ControllerInputView()
         {
@@ -39,6 +40,8 @@ namespace Ryujinx.Ava.UI.Views.Input
                         break;
                 }
             }
+
+            StartUpdatingData();
         }
 
         protected override void OnPointerReleased(PointerReleasedEventArgs e)
@@ -85,7 +88,7 @@ namespace Ryujinx.Ava.UI.Views.Input
 
         private void Button_IsCheckedChanged(object sender, RoutedEventArgs e)
         {
-            if (sender is ToggleButton button) 
+            if (sender is ToggleButton button)
             {
                 if (button.IsChecked is true)
                 {
@@ -106,7 +109,9 @@ namespace Ryujinx.Ava.UI.Views.Input
 
                         var viewModel = (DataContext as ControllerInputViewModel);
 
-                        IKeyboard keyboard = (IKeyboard)viewModel.ParentModel.AvaloniaKeyboardDriver.GetGamepad("0"); // Open Avalonia keyboard for cancel operations.
+                        IKeyboard keyboard =
+                            (IKeyboard)viewModel.ParentModel.AvaloniaKeyboardDriver
+                                .GetGamepad("0"); // Open Avalonia keyboard for cancel operations.
                         IButtonAssigner assigner = CreateButtonAssigner(isStick);
 
                         _currentAssigner.ButtonAssigned += (sender, e) =>
@@ -237,5 +242,81 @@ namespace Ryujinx.Ava.UI.Views.Input
             _currentAssigner?.Cancel();
             _currentAssigner = null;
         }
+
+        private void Control_OnUnloaded(object sender, RoutedEventArgs e)
+        {
+            _isRunning = false;
+        }
+
+
+        private async void StartUpdatingData()
+        {
+            while (_isRunning)
+            {
+                var viewModel = (DataContext as ControllerInputViewModel);
+                if (viewModel != null)
+                {
+                    IGamepad gamepad = viewModel.ParentModel.SelectedGamepad;
+                    var config = viewModel.Config;
+
+                    if (config.LeftJoystick != StickInputId.Unbound)
+                    {
+                        var stickInputId = (Ryujinx.Input.StickInputId)(int)config.LeftJoystick;
+                        (float leftAxisX, float leftAxisY) =
+                            gamepad.GetStick(stickInputId);
+                        viewModel.LeftStickPosition =
+                            ClampToCircle(ApplyDeadzone(leftAxisX, leftAxisY, config.DeadzoneLeft), config.RangeLeft)
+                                .ToString();
+                    }
+
+                    if (config.RightJoystick != StickInputId.Unbound)
+                    {
+                        var stickInputId = (Ryujinx.Input.StickInputId)(int)config.RightJoystick;
+                        (float rightAxisX, float rightAxisY) = gamepad.GetStick(stickInputId);
+                        viewModel.RightStickPosition =
+                            ClampToCircle(ApplyDeadzone(rightAxisX, rightAxisY, config.DeadzoneRight),
+                                config.RangeRight).ToString();
+                    }
+                }
+
+                await Task.Delay(100);
+            }
+        }
+
+        private static (int x, int y) ClampToCircle((int x, int y) postion, float range)
+        {
+            Vector2 point = new Vector2(postion.x, postion.y) * range;
+
+            if (point.Length() > short.MaxValue)
+            {
+                point = point / point.Length() * short.MaxValue;
+            }
+
+            return ((int)point.X, (int)point.Y);
+        }
+
+        private static (short x, short y) ApplyDeadzone(float x, float y, float deadzone)
+        {
+            float magnitudeClamped = Math.Min(MathF.Sqrt(x * x + y * y), 1f);
+
+            if (magnitudeClamped <= deadzone)
+            {
+                return (0, 0);
+            }
+
+            return (ClampAxis((x / magnitudeClamped) * ((magnitudeClamped - deadzone) / (1 - deadzone))),
+                ClampAxis((y / magnitudeClamped) * ((magnitudeClamped - deadzone) / (1 - deadzone))));
+        }
+
+
+        private static short ClampAxis(float value)
+        {
+            if (Math.Sign(value) < 0)
+            {
+                return (short)Math.Max(value * -short.MinValue, short.MinValue);
+            }
+
+            return (short)Math.Min(value * short.MaxValue, short.MaxValue);
+        }
     }
 }