Add TouchScreen Manager (#2333)

Ryujinx/Input/GTK3/GTK3MouseDriver.cs

@@ -0,0 +1,97 @@
+using Gdk;
+using Gtk;
+using System;
+using System.Numerics;
+using Size = System.Drawing.Size;
+
+namespace Ryujinx.Input.GTK3
+{
+    public class GTK3MouseDriver : IGamepadDriver
+    {
+        private Widget _widget;
+        private bool _isDisposed;
+
+        public bool[] PressedButtons { get; }
+        
+        public Vector2 CurrentPosition { get; private set; }
+
+        public GTK3MouseDriver(Widget parent)
+        {
+            _widget = parent;
+
+            _widget.MotionNotifyEvent += Parent_MotionNotifyEvent;
+            _widget.ButtonPressEvent += Parent_ButtonPressEvent;
+            _widget.ButtonReleaseEvent += Parent_ButtonReleaseEvent;
+
+            PressedButtons = new bool[(int)MouseButton.Count];
+        }
+
+        [GLib.ConnectBefore]
+        private void Parent_ButtonReleaseEvent(object o, ButtonReleaseEventArgs args)
+        {
+            PressedButtons[args.Event.Button - 1] = false;
+        }
+
+        [GLib.ConnectBefore]
+        private void Parent_ButtonPressEvent(object o, ButtonPressEventArgs args)
+        {
+            PressedButtons[args.Event.Button - 1] = true;
+        }
+
+        [GLib.ConnectBefore]
+        private void Parent_MotionNotifyEvent(object o, MotionNotifyEventArgs args)
+        {
+            if (args.Event.Device.InputSource == InputSource.Mouse)
+            {
+                CurrentPosition = new Vector2((float)args.Event.X, (float)args.Event.Y);
+            }
+        }
+
+        public bool IsButtonPressed(MouseButton button)
+        {
+            return PressedButtons[(int) button];
+        }
+
+        public Size GetClientSize()
+        {
+            return new Size(_widget.AllocatedWidth, _widget.AllocatedHeight);
+        }
+
+        public string DriverName => "GTK3";
+        
+        public event Action<string> OnGamepadConnected
+        {
+            add    { }
+            remove { }
+        }
+
+        public event Action<string> OnGamepadDisconnected
+        {
+            add    { }
+            remove { }
+        }
+
+        public ReadOnlySpan<string> GamepadsIds => new[] {"0"};
+        
+        public IGamepad GetGamepad(string id)
+        {
+            return new GTK3Mouse(this);
+        }
+
+        public void Dispose()
+        {
+            if (_isDisposed)
+            {
+                return;
+            }
+
+            _isDisposed = true;
+
+            _widget.MotionNotifyEvent -= Parent_MotionNotifyEvent;
+            _widget.ButtonPressEvent -= Parent_ButtonPressEvent;
+            _widget.ButtonReleaseEvent -= Parent_ButtonReleaseEvent;
+
+            _widget = null;
+        }
+    }
+}