Touch.cs

Siirry tämän tiedoston dokumentaatioon.

#region MIT License
/*
 * Copyright (c) 2009 University of Jyväskylä, Department of Mathematical
 * Information Technology.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#endregion
 
/*
 * Authors: Tero Jäntti, Tomi Karppinen
 */
 
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input.Touch;
 
namespace Jypeli
{
    public class Touch
    {
        private ScreenView screen;
        protected Vector2 _previousPosition;
        protected Vector2 _position;
        protected Vector2 _movement;
 
        internal long DurationInTicks = 0;
 
        public int Id { get; private set; }
 
        public object Tag { get; set; }
 
        public Vector PositionOnScreen
        {
            get
            {
                return ScreenView.FromXnaCoords( _position, screen.ViewportSize, Vector.Zero ).Transform( screen.GetScreenTransform() );
            }
        }
 
        public Vector PositionOnWorld
        {
            get
            {
                return Game.Instance.Camera.ScreenToWorld( PositionOnScreen );
            }
        }
 
        public Vector PrevPositionOnScreen
        {
            get
            {
                return ScreenView.FromXnaCoords( _previousPosition, screen.ViewportSize, Vector.Zero ).Transform( screen.GetScreenTransform() );
            }
        }
 
        public Vector PrevPositionOnWorld
        {
            get
            {
                return Game.Instance.Camera.ScreenToWorld( PrevPositionOnScreen );
            }
        }
 
        public Vector MovementOnScreen
        {
            get
            {
                return PositionOnScreen - PrevPositionOnScreen;
            }
        }
 
        public Vector MovementOnWorld
        {
            get
            {
                return PositionOnWorld - PrevPositionOnWorld;
            }
        }
 
        public TouchLocationState State { get; internal set; }
 
        internal Touch( ScreenView screen, TouchLocation location )
        {
            this.screen = screen;
            this.Id = location.Id;
            this._position = this._previousPosition = location.Position;
        }
 
        internal Touch( Vector2 position, Vector2 movement )
        {
            this._position = position;
            this._movement = movement;
        }
 
        internal void Update( TouchLocation location )
        {
            _previousPosition = _position;
            _position = location.Position;
            _movement = _position - _previousPosition;
            State = location.State;
            DurationInTicks++;
        }
    }
}