add system for controlling which forms can generate mouse input

BizHawk.Client.EmuHawk/Input/Input.cs

@@ -62,6 +62,29 @@ namespace BizHawk.Client.EmuHawk
 
 	public class Input
 	{
+		[Flags]
+		public enum InputFocus
+		{
+			None = 0,
+			Mouse = 1,
+			Keyboard = 2,
+			Pad = 4
+		}
+
+		/// <summary>
+		/// If your form needs this kind of input focus, be sure to say so.
+		/// Really, this only makes sense for mouse, but I've started building it out for other things
+		/// Why is this receiving a control, but actually using it as a Form (where the WantingMouseFocus is checked?)
+		/// Because later we might change it to work off the control, specifically, if a control is supplied (normally actually a Form will be supplied)
+		/// </summary>
+		public void ControlInputFocus(System.Windows.Forms.Control c, InputFocus types, bool wants)
+		{
+			if (types.HasFlag(InputFocus.Mouse) && wants) WantingMouseFocus.Add(c);
+			if (types.HasFlag(InputFocus.Mouse) && !wants) WantingMouseFocus.Remove(c);
+		}
+
+		HashSet<System.Windows.Forms.Control> WantingMouseFocus = new HashSet<System.Windows.Forms.Control>();
+
 		[Flags]
 		public enum ModifierKey
 		{
@@ -352,6 +375,7 @@ namespace BizHawk.Client.EmuHawk
 
 						// analyse moose
 						// other sorts of mouse api (raw input) could easily be added as a separate listing under a different class
+						if (WantingMouseFocus.Contains(System.Windows.Forms.Form.ActiveForm))
 						{
 							var P = System.Windows.Forms.Control.MousePosition;
 							if (trackdeltas)
@@ -366,11 +390,20 @@ namespace BizHawk.Client.EmuHawk
 
 							var B = System.Windows.Forms.Control.MouseButtons;
 							HandleButton("WMouse L", (B & System.Windows.Forms.MouseButtons.Left) != 0);
-							HandleButton("WMouse M", (B & System.Windows.Forms.MouseButtons.Middle) != 0);
+							HandleButton("WMouse C", (B & System.Windows.Forms.MouseButtons.Middle) != 0);
 							HandleButton("WMouse R", (B & System.Windows.Forms.MouseButtons.Right) != 0);
 							HandleButton("WMouse 1", (B & System.Windows.Forms.MouseButtons.XButton1) != 0);
 							HandleButton("WMouse 2", (B & System.Windows.Forms.MouseButtons.XButton2) != 0);
 						}
+						else
+						{
+							//unpress all buttons
+							HandleButton("WMouse L", false);
+							HandleButton("WMouse C", false);
+							HandleButton("WMouse R", false);
+							HandleButton("WMouse 1", false);
+							HandleButton("WMouse 2", false);
+						}
 
 					}
 

BizHawk.Client.EmuHawk/MainForm.cs

@@ -623,6 +623,20 @@ namespace BizHawk.Client.EmuHawk
 			}
 		}
 
+
+
+		protected override void OnActivated(EventArgs e)
+		{
+			base.OnActivated(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, true);
+		}
+
+		protected override void OnDeactivate(EventArgs e)
+		{
+			base.OnDeactivate(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, false);
+		}
+
 		public void ProcessInput()
 		{
 			ControllerInputCoalescer conInput = Global.ControllerInputCoalescer as ControllerInputCoalescer;

BizHawk.Client.EmuHawk/config/ControllerConfig.cs

@@ -42,6 +42,18 @@ namespace BizHawk.Client.EmuHawk
 			ControllerImages.Add("WonderSwan Controller", Properties.Resources.WonderSwanColor);
 		}
 
+		protected override void OnActivated(EventArgs e)
+		{
+			base.OnActivated(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, true);
+		}
+
+		protected override void OnDeactivate(EventArgs e)
+		{
+			base.OnDeactivate(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, false);
+		}
+
 		private ControllerConfig()
 		{
 			InitializeComponent();

BizHawk.Client.EmuHawk/config/HotkeyConfig.cs

@@ -18,6 +18,19 @@ namespace BizHawk.Client.EmuHawk
 			{
 				IDB_SAVE.Focus(); // A very dirty hack to avoid https://code.google.com/p/bizhawk/issues/detail?id=161
 			};
+
+		}
+
+		protected override void OnActivated(EventArgs e)
+		{
+			base.OnActivated(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, true);
+		}
+
+		protected override void OnDeactivate(EventArgs e)
+		{
+			base.OnDeactivate(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, false);
 		}
 
 		private void NewHotkeyWindow_Load(object sender, EventArgs e)

BizHawk.Client.EmuHawk/tools/VirtualPads/VirtualpadTool.cs

@@ -30,6 +30,18 @@ namespace BizHawk.Client.EmuHawk
 			TopMost = Global.Config.VirtualPadSettings.TopMost;
 		}
 
+		protected override void OnActivated(EventArgs e)
+		{
+			base.OnActivated(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, true);
+		}
+
+		protected override void OnDeactivate(EventArgs e)
+		{
+			base.OnDeactivate(e);
+			Input.Instance.ControlInputFocus(this, Input.InputFocus.Mouse, false);
+		}
+
 		private void VirtualpadTool_Load(object sender, EventArgs e)
 		{
 			_defaultWidth = Size.Width;