Implement cursor hiding on Windows to partially address #36. (Will do Linux backend next)

ClassicalSharp/2D/Screens/ChatScreen.cs

@@ -94,6 +94,7 @@ namespace ClassicalSharp {
 
 		public override void Dispose() {
 			if( !textInput.chatInputText.Empty ) {
+				game.CursorVisible = false;
 				game.chatInInputBuffer = textInput.chatInputText.ToString();
 			}
 			chatFont.Dispose();
@@ -145,6 +146,7 @@ namespace ClassicalSharp {
 		}
 		
 		void OpenTextInputBar( string initialText ) {
+			game.CursorVisible = true;
 			suppressNextPress = true;
 			HandlesAllInput = true;
 			textInput.chatInputText.Clear();
@@ -158,6 +160,7 @@ namespace ClassicalSharp {
 			if( HandlesAllInput ) { // text input bar
 				if( key == game.Keys[KeyMapping.SendChat] ) {
 					HandlesAllInput = false;
+					game.CursorVisible = false;
 					game.Camera.RegrabMouse();
 					textInput.SendTextInBufferAndReset();
 				} else if( key == Key.PageUp ) {

ClassicalSharp/2D/Screens/NormalScreen.cs

@@ -25,12 +25,14 @@ namespace ClassicalSharp {
 					playerList.Dispose();
 					playerList = null;
 				}
+				graphicsApi.Texturing = false;
+			} else {
+				graphicsApi.Texturing = false;
+				DrawCrosshairs();
 			}
-			graphicsApi.Texturing = false;
-			DrawCrosshairs();
 		}
 		
-		const int crosshairExtent = 20, crosshairWeight = 2;
+		const int crosshairExtent = 15, crosshairWeight = 2;
 		void DrawCrosshairs() {
 			int curCol = 150 + (int)( 50 * Math.Abs( Math.Sin( game.accumulator ) ) );
 			FastColour col = new FastColour( curCol, curCol, curCol );
@@ -48,6 +50,7 @@ namespace ClassicalSharp {
 			if( playerList != null ) {
 				playerList.Dispose();
 			}
+			game.CursorVisible = true;
 		}
 		
 		public override void OnResize( int oldWidth, int oldHeight, int width, int height ) {
@@ -68,6 +71,7 @@ namespace ClassicalSharp {
 			chat.Init();
 			hotbar = new BlockHotbarWidget( game );
 			hotbar.Init();
+			game.CursorVisible = false;
 		}
 		
 		public override bool HandlesAllInput {

OpenTK/INativeWindow.cs

@@ -111,7 +111,11 @@ namespace OpenTK {
 		/// <summary> Gets the available MouseDevice. </summary>
 		MouseDevice Mouse { get; }
 		
+		/// <summary> Gets or sets the cursor position in screen coordinates. </summary>
 		Point DesktopCursorPos { get; set; }
+		
+		/// <summary> Sets whether the cursor is visible in the window. </summary>
+		bool CursorVisible { set; }
 
 		/// <summary> Occurs whenever the window is moved. </summary>
 		event EventHandler<EventArgs> Move;

OpenTK/NativeWindow.cs

@@ -237,7 +237,12 @@ namespace OpenTK {
 			get { return implementation.Mouse; }
 		}
 		
-		/// <summary> Gets the primary Mouse device, or null if no Mouse exists. </summary>
+		/// <summary> Sets whether the cursor is visible in the window. </summary>
+		public bool CursorVisible {
+			set { implementation.CursorVisible = value; }
+		}
+		
+		/// <summary> Gets or sets the cursor position in screen coordinates. </summary>
 		public Point DesktopCursorPos {
 			get { return implementation.DesktopCursorPos; }
 			set { implementation.DesktopCursorPos = value; }

OpenTK/Platform/MacOS/CarbonGLNative.cs

@@ -1066,6 +1066,11 @@ namespace OpenTK.Platform.MacOS
 			set { System.Windows.Forms.Cursor.Position = value; }
 		}
 		
+		// TODO: Hide and show cursor
+		public bool CursorVisible {
+			set { }
+		}
+		
 		#endregion
 	}
 }

OpenTK/Platform/Windows/API.cs

@@ -154,10 +154,13 @@ namespace OpenTK.Platform.Windows {
 		public static extern bool TrackMouseEvent(ref TrackMouseEventStructure lpEventTrack);
 
 		[DllImport("user32.dll", SetLastError = true), SuppressUnmanagedCodeSecurity]
-		internal static extern bool GetCursorPos(ref Point point);
+		internal static extern bool GetCursorPos(ref POINT point);
 
 		[DllImport("user32.dll", SetLastError = true), SuppressUnmanagedCodeSecurity]
 		internal static extern bool SetCursorPos(int x, int y);
+		
+		[DllImport("user32.dll", SetLastError = true), SuppressUnmanagedCodeSecurity]
+		internal static extern bool ShowCursor( int value );
 	}
 
 	internal struct Constants {

OpenTK/Platform/Windows/WinGLNative.cs

@@ -803,14 +803,18 @@ namespace OpenTK.Platform.Windows
 
 		public Point DesktopCursorPos {
 			get {
-				Point pos = default( Point );
+				POINT pos = default( POINT );
 				API.GetCursorPos( ref pos );
-				return pos;
+				return new Point( pos.X, pos.Y );
 			}
 			set {
 				API.SetCursorPos( value.X, value.Y );
 			}
 		}
+		
+		public bool CursorVisible {
+			set { API.ShowCursor( value ? 1 : 0 ); }
+		}
 
 		public void Dispose() {
 			Dispose(true);

OpenTK/Platform/X11/X11GLNative.cs

@@ -820,6 +820,11 @@ namespace OpenTK.Platform.X11 {
 			set { System.Windows.Forms.Cursor.Position = value; }
 		}
 		
+		// TODO: Hide and show cursor
+		public bool CursorVisible {
+			set { }
+		}
+		
 		/// <summary> Returns true if a render window/context exists. </summary>
 		public bool Exists {
 			get { return exists; }