using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WpfDesktopEdition;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Windows.Media;
using System.Windows.Interop;

namespace CSHowDoISamples
{
    public partial class AddSimpleMarkers : UserControl
    {
        public AddSimpleMarkers()
        {
            InitializeComponent();
        }

        int rotateAngle = 50;
        float YourLat = 0f;
        float YourLong = 0f;
        string YourBitmapPath= yourbitmappath;

        private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            wpfMap1.MapUnit = GeographyUnit.DecimalDegree;
            wpfMap1.CurrentExtent = new RectangleShape(-155.733, 95.60, 104.42, -81.9);

            SimpleMarkerOverlay markerOverlay = new SimpleMarkerOverlay();

            Marker marker = new Marker(YourLat, YourLong);
            marker.Width = 20;
            marker.Height = 34;
            marker.YOffset = -17;

            Bitmap bitmap = new Bitmap(YourBitmapPath);
            marker.ImageSource = Imaging.CreateBitmapSourceFromHBitmap(KiRotate(bitmap, rotateAngle).GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

            markerOverlay.Markers.Add(marker);

            wpfMap1.Overlays.Add("MarkerOverlay", markerOverlay);
            wpfMap1.Refresh();
        }

        public static Bitmap KiRotate(Bitmap bmp, float angle)
        {
         
            angle = angle % 360;
            if (angle > 180)
                angle -= 360;

            System.Drawing.Imaging.PixelFormat pf = default(System.Drawing.Imaging.PixelFormat);

            pf = bmp.PixelFormat;


            float sin = (float)Math.Abs(Math.Sin(angle * Math.PI / 180.0)); // this function takes radians
            float cos = (float)Math.Abs(Math.Cos(angle * Math.PI / 180.0)); // this one too
            float newImgWidth = sin * bmp.Height + cos * bmp.Width;
            float newImgHeight = sin * bmp.Width + cos * bmp.Height;
            float originX = 0f;
            float originY = 0f;

            if (angle > 0)
            {
                if (angle <= 90)
                    originX = sin * bmp.Height;
                else
                {
                    originX = newImgWidth;
                    originY = newImgHeight - sin * bmp.Width;
                }
            }
            else
            {
                if (angle >= -90)
                    originY = sin * bmp.Width;
                else
                {
                    originX = newImgWidth - sin * bmp.Height;
                    originY = newImgHeight;
                }
            }

            Bitmap newImg = new Bitmap((int)newImgWidth, (int)newImgHeight, pf);
            Graphics g = Graphics.FromImage(newImg);
            g.TranslateTransform(originX, originY); // offset the origin to our calculated values
            g.RotateTransform(angle); // set up rotate
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBilinear;
            g.DrawImageUnscaled(bmp, 0, 0);
            g.Dispose();
            return newImg;
        }

    }
}