//
// (C) Copyright 2003-2019 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//


using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace Revit.SDK.Samples.InPlaceMembers.CS
{
    /// <summary>
    /// picturebox wich can display 3D geometry outline
    /// </summary>
    public class PictureBox3D : Button
    {
        IGraphicsData m_sourceData;        //datasource
        Matrix m_transform;                //transform matrix between origin data and display data

        /// <summary>
        /// paint outline
        /// </summary>
        /// <param name="pe"></param>
        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
            
            if (null == m_sourceData)
            {
                return;
            }

            //prepare data
            Graphics g = pe.Graphics;
            g.Clear(System.Drawing.Color.White);
            Pen pen = new Pen(System.Drawing.Color.DarkGreen);
            GraphicsPath path = new GraphicsPath();

            //draw curves one by one
            List<PointF[]> curves = m_sourceData.PointCurves();
            foreach (PointF[] curve in curves)
            {
                path.Reset();
                path.AddLines(curve);
                path.Transform(m_transform);
                g.DrawPath(pen, path);
            }
        }

        /// <summary>
        /// scale the view by default value
        /// </summary>
        /// <param name="zoomIn">zomme in or zoom out</param>
        public void Scale(bool zoomIn)
        {
            float ratio = 1.0f;
            if(zoomIn)
            {
                ratio = 10.0f/11.0f;
            }
            else
            {
                ratio = 11.0f/10.0f;
            }
            m_transform.Scale(ratio, ratio, MatrixOrder.Append);
            Invalidate();
        }

        /// <summary>
        /// move view in horizontal direction
        /// </summary>
        /// <param name="left">left or right</param>
        public void MoveX(bool left)
        {
            float len = 0.0f;
            if (left)
            {
                len = -5.0f;
            }
            else
            {
                len = 5.0f;
            }
            m_transform.Translate(len, 0, MatrixOrder.Append);
            Invalidate();
        }

        /// <summary>
        /// move view in vertical direction
        /// </summary>
        /// <param name="up">up or down</param>
        public void MoveY(bool up)
        {
            float len = 0.0f;
            if (up)
            {
                len = 5.0f;
            }
            else
            {
                len = -5.0f;
            }
            m_transform.Translate(0, len, MatrixOrder.Append);
            Invalidate();
        }

        /// <summary>
        /// datasource which can be any class inherited from IGraphicsData
        /// </summary>
        public IGraphicsData DataSource
        {
            get
            {
                return m_sourceData;
            }
            set
            {
                if (null != value)
                {
                    m_sourceData = value;
                    RectangleF rec = m_sourceData.Region;
                    PointF[] plgpts = GetDisplayRegion();
                    m_transform = new Matrix(rec, plgpts);
                    m_sourceData.UpdateViewEvent += new UpdateViewDelegate(Invalidate);
                }
            }
        }

        /// <summary>
        /// get the display region, adjust the proportion and location
        /// </summary>
        /// <returns></returns>
        private PointF[] GetDisplayRegion()
        {
            RectangleF rec = m_sourceData.Region;
            const float MARGIN = 8.0f;

            float realWidth = this.Width - MARGIN *2;
            float realHeight = this.Height - MARGIN*2;
            float minX = MARGIN;
            float minY = MARGIN;
            float ratioRec = rec.Height / rec.Width;
            float ratioBox = realHeight / realWidth;

            if (ratioRec > ratioBox)
            {
                float temp = realWidth;
                realWidth = realHeight * rec.Width /rec.Height;
                minX = (temp - realWidth)/2.0f;
            }
            else
            {
                float temp = realHeight;
                realHeight = realWidth * rec.Height/rec.Width;
                minY = (temp - realHeight) / 2.0f;    
            }

            if (rec.Width < (GraphicsData.MINEDGElENGTH + 1) && 
                rec.Height < (GraphicsData.MINEDGElENGTH + 1))
            {
                minX = realWidth / 2.0f;
                minY = realHeight / 2.0f;
            }

            PointF[] plgpts = new PointF[3];
            plgpts[0] = new PointF(minX, minY);
            plgpts[1] = new PointF(realWidth + minX, minY);
            plgpts[2] = new PointF(minX, realHeight + minY);

            return plgpts;
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                ((IDisposable)m_transform)?.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}