using System.Windows;
using System.Windows.Controls;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WpfDesktopEdition;

namespace CSHowDoISamples
{
    public partial class DisplayASimpleMap : UserControl
    {
        LayerOverlay overlay = new LayerOverlay();
        InMemoryFeatureLayer highLightPointLayer = new InMemoryFeatureLayer();
        PolygonShape polygon = new PolygonShape("POLYGON((0 0, 80 0, 80 80, 0 80, 0 0))");
        InMemoryFeatureLayer highLightLineLayer = new InMemoryFeatureLayer();
        public DisplayASimpleMap()
        {
            InitializeComponent();
            highLightLineLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.StandardColors.Red, 2, false);
            highLightLineLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            highLightPointLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.StandardColors.Red, 10);
            highLightPointLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
        }


        private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            Map1.MapUnit = GeographyUnit.DecimalDegree;
            Map1.CurrentExtent = new RectangleShape(-155.733, 95.60, 104.42, -81.9);


            InMemoryFeatureLayer polygonLayer = new InMemoryFeatureLayer();
            polygonLayer.InternalFeatures.Add(new Feature(polygon));
            polygonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country1;
            polygonLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            InMemoryFeatureLayer pointLayer = new InMemoryFeatureLayer();
            InMemoryFeatureLayer lineLayer = new InMemoryFeatureLayer();
            for (int i = 0; i < polygon.OuterRing.Vertices.Count - 1; i++)
            {
                LineShape line = new LineShape(new Vertex[] { polygon.OuterRing.Vertices[i], polygon.OuterRing.Vertices[i + 1] });
                lineLayer.InternalFeatures.Add(new Feature(line));

                PointShape point = new PointShape(polygon.OuterRing.Vertices[i]);
                pointLayer.InternalFeatures.Add(new Feature(point));
            }

            overlay.Layers.Add(polygonLayer);
            overlay.Layers.Add("points", pointLayer);
            overlay.Layers.Add("lines", lineLayer);
            overlay.Layers.Add(highLightLineLayer);
            overlay.Layers.Add(highLightPointLayer);

            Map1.Overlays.Add("overlay", overlay);
            Map1.Refresh();
        }

	//map click event
        private void Map1_MapClick(object sender, MapClickWpfMapEventArgs e)
        {
            PointShape point = e.WorldLocation;

            foreach (var item in ((InMemoryFeatureLayer)overlay.Layers["points"]).InternalFeatures)
            {
                if (point.GetDistanceTo(item, GeographyUnit.Meter, DistanceUnit.Meter) < 5)
                {
                    highLightPointLayer.InternalFeatures.Add(new Feature((PointShape)item.GetShape()));
                    break;
                }
            }

            // ---------------------------------- display line on the side of polygon----------------------------------
            //highLightLineLayer.InternalFeatures.Clear();
            //foreach (var item in ((InMemoryFeatureLayer)overlay.Layers["lines"]).InternalFeatures)
            //{
            //    LineShape line = (LineShape)item.GetShape();
            //    if (point.GetDistanceTo(item, GeographyUnit.Meter, DistanceUnit.Meter) < 5)
            //    {
            //        highLightLineLayer.InternalFeatures.Add(new Feature(line));
            //        break;
            //    }
            //}
            Map1.Refresh();
        }
	
	//add a button, and invoke this method
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            LineShape line = new LineShape();
            foreach (var item in highLightPointLayer.InternalFeatures)
            {
                PointShape point = (PointShape)item.GetShape();
                line.Vertices.Add(new Vertex(point));
            }

            MultipolygonShape polygons = line.Buffer(5, GeographyUnit.Meter, DistanceUnit.Meter);
            polygons = polygons.GetIntersection(polygon);

            InMemoryFeatureLayer newPolygon = new InMemoryFeatureLayer();
            newPolygon.InternalFeatures.Add(new Feature(polygons));
            newPolygon.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.Green);
            newPolygon.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            ((LayerOverlay)Map1.Overlays["overlay"]).Layers.Add(newPolygon);
            Map1.Refresh();
        }
    }
}