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Root/src/Input/Mouse.cs

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#region License
/* FNA - XNA4 Reimplementation for Desktop Platforms
 * Copyright 2009-2016 Ethan Lee and the MonoGame Team
 *
 * Released under the Microsoft Public License.
 * See LICENSE for details.
 */
#endregion
 
#region Using Statements
using System;
#endregion
 
namespace Microsoft.Xna.Framework.Input
{
    /// <summary>
    /// Allows reading position and button click information from mouse.
    /// </summary>
    public static class Mouse
    {
        #region Public Properties
 
        public static IntPtr WindowHandle
        {
            get;
            set;
        }
 
        #endregion
 
        #region Internal Variables
 
        internal static int INTERNAL_WindowWidth = GraphicsDeviceManager.DefaultBackBufferWidth;
        internal static int INTERNAL_WindowHeight = GraphicsDeviceManager.DefaultBackBufferHeight;
        internal static int INTERNAL_BackBufferWidth = GraphicsDeviceManager.DefaultBackBufferWidth;
        internal static int INTERNAL_BackBufferHeight = GraphicsDeviceManager.DefaultBackBufferHeight;
 
        internal static int INTERNAL_MouseWheel = 0;
 
        // FIXME: Remove when global mouse state is accessible! -flibit
        internal static bool INTERNAL_IsWarped = false;
        internal static int INTERNAL_warpX = 0;
        internal static int INTERNAL_warpY = 0;
 
        #endregion
 
        #region Public Interface
 
        /// <summary>
        /// Gets mouse state information that includes position and button
        /// presses for the provided window
        /// </summary>
        /// <returns>Current state of the mouse.</returns>
        public static MouseState GetState()
        {
            int x, y;
            ButtonState left, middle, right, x1, x2;
 
            FNAPlatform.GetMouseState(
                out x,
                out y,
                out left,
                out middle,
                out right,
                out x1,
                out x2
            );
 
            // If we warped the mouse, we've already done this in SetPosition.
            if (INTERNAL_IsWarped)
            {
                x = INTERNAL_warpX;
                y = INTERNAL_warpY;
            }
            else
            {
                // Scale the mouse coordinates for the faux-backbuffer
                x = (int) ((double) x * INTERNAL_BackBufferWidth / INTERNAL_WindowWidth);
                y = (int) ((double) y * INTERNAL_BackBufferHeight / INTERNAL_WindowHeight);
            }
 
            return new MouseState(
                x,
                y,
                INTERNAL_MouseWheel,
                left,
                middle,
                right,
                x1,
                x2
            );
        }
 
        /// <summary>
        /// Sets mouse cursor's relative position to game-window.
        /// </summary>
        /// <param name="x">Relative horizontal position of the cursor.</param>
        /// <param name="y">Relative vertical position of the cursor.</param>
        public static void SetPosition(int x, int y)
        {
            // The state should appear to be what they _think_ they're setting first.
            INTERNAL_warpX = x;
            INTERNAL_warpY = y;
 
            // Scale the mouse coordinates for the faux-backbuffer
            x = (int) ((double) x * INTERNAL_WindowWidth / INTERNAL_BackBufferWidth);
            y = (int) ((double) y * INTERNAL_WindowHeight / INTERNAL_BackBufferHeight);
 
            FNAPlatform.SetMousePosition(WindowHandle, x, y);
            INTERNAL_IsWarped = true;
        }
 
        #endregion
    }
}

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