MouseMotionEventArgs.cs :  » Game » SDL » SdlDotNet » Input » C# / CSharp Open Source

#region LICENSE
/*
 * Copyright (C) 2004 - 2007 David Hudson (jendave@yahoo.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#endregion LICENSE

using System;
using System.Drawing;
using System.Diagnostics.CodeAnalysis;

using SdlDotNet.Core;
using Tao.Sdl;

namespace SdlDotNet.Input{
    /// <summary>
    /// Event arguments for MouseMotion Events.
    /// </summary>
    public class MouseMotionEventArgs : SdlEventArgs
    {
        #region Constructors

        /// <summary>
        /// MouseMotion
        /// </summary>
        /// <param name="buttonPressed">The current mouse button state</param>
        /// <param name="button">Button pressed</param>
        /// <param name="positionX">The current X coordinate</param>
        /// <param name="positionY">The current Y coordinate</param>
        /// <param name="relativeX">
        /// The difference between the last X coordinate and current</param>
        /// <param name="relativeY">
        /// The difference between the last Y coordinate and current</param>
        public MouseMotionEventArgs(bool buttonPressed, MouseButton button, short positionX, short positionY,
            short relativeX, short relativeY)
        {
            Sdl.SDL_Event evt = new Sdl.SDL_Event();
            evt.motion.xrel = relativeX;
            evt.motion.yrel = relativeY;
            evt.motion.which = (byte)button;
            evt.motion.x = positionX;
            evt.motion.y = positionY;
            evt.type = (byte)EventTypes.MouseMotion;
            if (buttonPressed)
            {
                evt.motion.state = (byte)ButtonKeyState.Pressed;
            }
            else
            {
                evt.motion.state = (byte)ButtonKeyState.NotPressed;
            }
            this.EventStruct = evt;
        }

        internal MouseMotionEventArgs(Sdl.SDL_Event evt)
            : base(evt)
        {
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// True if button pressed
        /// </summary>
        public bool ButtonPressed
        {
            get
            {
                return (this.EventStruct.motion.state != (byte)ButtonKeyState.NotPressed);
            }
        }

        /// <summary>
        /// Returns which button was pressed
        /// </summary>
        public MouseButton Button
        {
            get
            {
                if ((this.EventStruct.motion.state & Sdl.SDL_BUTTON_LMASK) != 0)
                {
                    return MouseButton.PrimaryButton;
                }
                else if ((this.EventStruct.motion.state & Sdl.SDL_BUTTON_RMASK) != 0)
                {
                    return MouseButton.SecondaryButton;
                }
                else if ((this.EventStruct.motion.state & Sdl.SDL_BUTTON_MMASK) != 0)
                {
                    return MouseButton.MiddleButton;
                }
                else if ((this.EventStruct.motion.state & Sdl.SDL_BUTTON((byte)MouseButton.WheelDown)) != 0)
                {
                    return MouseButton.WheelDown;
                }
                else if ((this.EventStruct.motion.state & Sdl.SDL_BUTTON((byte)MouseButton.WheelUp)) != 0)
                {
                    return MouseButton.WheelUp;
                }
                else
                {
                    return MouseButton.None;
                }
            }
        }

        /// <summary>
        /// X position of mouse
        /// </summary>
        [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Correct Spelling")]
        public short X
        {
            get
            {
                return this.EventStruct.motion.x;
            }
        }

        /// <summary>
        /// Y position of mouse
        /// </summary>
        [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", Justification = "Correct Spelling")]
        public short Y
        {
            get
            {
                return this.EventStruct.motion.y;
            }
        }

        /// <summary>
        /// change in X position of mouse
        /// </summary>
        public short RelativeX
        {
            get
            {
                return this.EventStruct.motion.xrel;
            }
        }

        /// <summary>
        /// Change in Y position of mouse
        /// </summary>
        public short RelativeY
        {
            get
            {
                return this.EventStruct.motion.yrel;
            }
        }

        /// <summary>
        /// Returns Point(X, Y) of mouse
        /// </summary>
        public Point Position
        {
            get
            {
                return new Point(this.EventStruct.motion.x, this.EventStruct.motion.y);
            }
        }

        #endregion
    }
}