/** Copyright (c) 2017 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/

namespace Tizen.NUI
{

    /// <summary>
    /// A PanGesture is emitted when the user moves one or more fingers in a particular direction.<br>
    /// A pan gesture will end in the following ways:<br>
    /// - User releases the primary finger (the first touch).<br>
    /// - User has more fingers on the screen than the maximum specified.<br>
    /// - User has less fingers on the screen than the minimum specified.<br>
    /// - Cancelled by the system.<br>
    /// A pan gesture will continue to be sent to the actor under than initial pan until it ends.<br>
    /// </summary>
    public class PanGesture : Gesture
    {
        private global::System.Runtime.InteropServices.HandleRef swigCPtr;

        internal PanGesture(global::System.IntPtr cPtr, bool cMemoryOwn) : base(NDalicPINVOKE.PanGesture_SWIGUpcast(cPtr), cMemoryOwn)
        {
            swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
        }

        internal static global::System.Runtime.InteropServices.HandleRef getCPtr(PanGesture obj)
        {
            return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
        }

        protected override void Dispose(DisposeTypes type)
        {
            if(disposed)
            {
                return;
            }

            if(type == DisposeTypes.Explicit)
            {
                //Called by User
                //Release your own managed resources here.
                //You should release all of your own disposable objects here.
            }

            //Release your own unmanaged resources here.
            //You should not access any managed member here except static instance.
            //because the execution order of Finalizes is non-deterministic.

            if (swigCPtr.Handle != global::System.IntPtr.Zero)
            {
                if (swigCMemOwn)
                {
                    swigCMemOwn = false;
                    NDalicPINVOKE.delete_PanGesture(swigCPtr);
                }
                swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
            }

            base.Dispose(type);
        }


        internal static PanGesture GetPanGestureFromPtr(global::System.IntPtr cPtr)
        {
            PanGesture ret = new PanGesture(cPtr, false);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        /// <summary>
        /// The velocity at which the user is moving their fingers.<br>
        /// This is represented as a Vector2 and is the pixel movement per millisecond.<br>
        /// A positive x value shows that the user is panning to the right, a negative x value means the opposite.<br>
        /// A positive y value shows that the user is panning downwards, a negative y values means upwards.<br>
        /// </summary>
        public Vector2 Velocity
        {
            get
            {
                return velocity;
            }
        }

        /// <summary>
        /// This is a Vector2 showing how much the user has panned (dragged) since the last pan gesture or,
        /// if the gesture has just started, then the amount panned since the user touched the screen.<br>
        /// A positive x value shows that the user is panning to the right, a negative x value means the opposite.<br>
        /// A positive y value shows that the user is panning downwards, a negative y value means upwards.<br>
        /// </summary>
        public Vector2 Displacement
        {
            get
            {
                return displacement;
            }
        }

        /// <summary>
        /// This current touch position of the primary touch point in local actor coordinates.
        /// </summary>
        public Vector2 Position
        {
            get
            {
                return position;
            }
        }

        /// <summary>
        /// The velocity at which the user is moving their fingers.<br>
        /// This is represented as a Vector2 and is the pixel movement per millisecond.<br>
        /// A positive x value shows that the user is panning to the right, a negative x value means the opposite.<br>
        /// A positive y value shows that the user is panning downwards, a negative y values means upwards.<br>
        /// This value represents the screen coordinates.<br>
        /// </summary>
        public Vector2 ScreenVelocity
        {
            get
            {
                return screenVelocity;
            }
        }

        /// <summary>
        /// This is a Vector2 showing how much the user has panned (dragged) since the last pan gesture or,
        /// if the gesture has just started, then the amount panned since the user touched the screen.<br>
        /// A positive x value shows that the user is panning to the right, a negative x value means the opposite.<br>
        /// A positive y value shows that the user is panning downwards, a negative y value means upwards.<br>
        /// This value is in screen coordinates.<br>
        /// </summary>
        public Vector2 ScreenDisplacement
        {
            get
            {
                return screenDisplacement;
            }
        }

        /// <summary>
        /// This current touch position of the primary touch point in screen coordinates.
        /// </summary>
        public Vector2 ScreenPosition
        {
            get
            {
                return screenPosition;
            }
        }

        /// <summary>
        /// The total number of fingers touching the screen in a pan gesture.
        /// </summary>
        public uint NumberOfTouches
        {
            get
            {
                return numberOfTouches;
            }
        }

        /// <summary>
        /// Default Constructor.
        /// </summary>
        public PanGesture() : this(NDalicPINVOKE.new_PanGesture__SWIG_0(), true)
        {
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
        }

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="state">The state of the gesture</param>
        internal PanGesture(Gesture.StateType state) : this(NDalicPINVOKE.new_PanGesture__SWIG_1((int)state), true)
        {
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
        }


        private Vector2 velocity
        {
            set
            {
                NDalicPINVOKE.PanGesture_velocity_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_velocity_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private Vector2 displacement
        {
            set
            {
                NDalicPINVOKE.PanGesture_displacement_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_displacement_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private Vector2 position
        {
            set
            {
                NDalicPINVOKE.PanGesture_position_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_position_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private Vector2 screenVelocity
        {
            set
            {
                NDalicPINVOKE.PanGesture_screenVelocity_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_screenVelocity_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private Vector2 screenDisplacement
        {
            set
            {
                NDalicPINVOKE.PanGesture_screenDisplacement_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_screenDisplacement_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private Vector2 screenPosition
        {
            set
            {
                NDalicPINVOKE.PanGesture_screenPosition_set(swigCPtr, Vector2.getCPtr(value));
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                global::System.IntPtr cPtr = NDalicPINVOKE.PanGesture_screenPosition_get(swigCPtr);
                Vector2 ret = (cPtr == global::System.IntPtr.Zero) ? null : new Vector2(cPtr, false);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        private uint numberOfTouches
        {
            set
            {
                NDalicPINVOKE.PanGesture_numberOfTouches_set(swigCPtr, value);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            }
            get
            {
                uint ret = NDalicPINVOKE.PanGesture_numberOfTouches_get(swigCPtr);
                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
                return ret;
            }
        }

        /// <summary>
        /// Returns the speed at which the user is moving their fingers.<br>
        /// This is the pixel movement per millisecond.<br>
        /// </summary>
        /// <returns>The speed of the pan (in pixels per millisecond)</returns>
        public float GetSpeed()
        {
            float ret = NDalicPINVOKE.PanGesture_GetSpeed(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        /// <summary>
        /// This returns the distance the user has panned (dragged) since the last pan gesture or,
        /// if the gesture has just started, then the distance moved since the user touched the screen.<br>
        /// This is always a positive value.<br>
        /// </summary>
        /// <returns>The distance, as a float, a user's finger has panned</returns>
        public float GetDistance()
        {
            float ret = NDalicPINVOKE.PanGesture_GetDistance(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        /// <summary>
        /// Returns the speed at which the user is moving their fingers relative to screen coordinates.<br>
        /// This is the pixel movement per millisecond.<br>
        /// </summary>
        /// <returns>The speed of the pan (in pixels per millisecond)</returns>
        public float GetScreenSpeed()
        {
            float ret = NDalicPINVOKE.PanGesture_GetScreenSpeed(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        /// <summary>
        /// This returns the distance the user has panned (dragged) since the last pan gesture in screen
        /// coordinates or, if the gesture has just started, then the distance in screen coordinates moved
        /// since the user touched the screen.<br>
        /// This is always a positive value.<br>
        /// </summary>
        /// <returns>The distance, as a float, a user's finger has panned</returns>
        public float GetScreenDistance()
        {
            float ret = NDalicPINVOKE.PanGesture_GetScreenDistance(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

    }

}