using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using ThinkGeo.MapSuite.Core;
namespace Clipping
{
public partial class TestForm : Form
{
private MapEngine mapEngine = new MapEngine();
private Bitmap bitmap = null;
ShapeFileFeatureLayer worldLayer = null;
ShapeFileFeatureLayer evergreenLayer = null;
public TestForm()
{
InitializeComponent();
}
private void TestForm_Load(object sender, EventArgs e)
{
// Set the full extent and the background color
mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-99.26,16.29,-26.37,-61.48), Map.Width, Map.Height);
mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);
// Adds the static layers to the MapEngine
//Adds the countries background layer.
worldLayer = new ShapeFileFeatureLayer(@"..\..\Data\Countries02.shp", ShapeFileReadWriteMode.ReadOnly);
worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.County1;
worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
mapEngine.StaticLayers.Add("WorldLayer", worldLayer);
// Adds the evergreen layer to be clipped.
evergreenLayer = new ShapeFileFeatureLayer(@"..\..\Data\evergreen.shp", ShapeFileReadWriteMode.ReadOnly);
evergreenLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightGreen, GeoColor.StandardColors.DarkGreen);
evergreenLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
mapEngine.StaticLayers.Add("EverGreenLayer", evergreenLayer);
//Adds the InMemoryFeatureLayer with of the polygon of Brazil used for clipping.
InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();
inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle
(GeoColor.StandardColors.Transparent, GeoColor.StandardColors.Black, 1);
inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
worldLayer.Open();
Collection<Feature> features = worldLayer.FeatureSource.GetFeaturesByColumnValue("cntry_name","Brazil");
worldLayer.Close();
inMemoryFeatureLayer.InternalFeatures.Add(features[0]);
mapEngine.DynamicLayers.Add(inMemoryFeatureLayer);
DrawImage();
}
private void btnClip_Click(object sender, EventArgs e)
{
//deletes the files for the clipped shapefile if they already exist.
if (File.Exists(@"..\..\Data\evergreenclip.shp"))
{
DeleteClipFiles();
}
//Gets the MultipolygonShape of Brazil used for clipping.
worldLayer.Open();
Collection<Feature> features = worldLayer.FeatureSource.GetFeaturesByColumnValue("cntry_name", "Brazil");
worldLayer.Close();
MultipolygonShape multiPolygonShape = (MultipolygonShape)features[0].GetShape();
//Calls the ClipShapeFile function to get the clipped layer.
ShapeFileFeatureLayer clipLayer = ClipShapeFile(evergreenLayer, @"..\..\Data\evergreenclip.shp", multiPolygonShape);
//Adds the clipped shapefile to the mapEngine.
mapEngine.StaticLayers.Remove("EverGreenLayer");
//Adds the new clipped layer of evergreeen.
ShapeFileFeatureLayer.BuildIndexFile(@"..\..\Data\evergreenclip.shp", BuildIndexMode.DoNotRebuild);
clipLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.LightGreen, GeoColor.StandardColors.DarkGreen);
clipLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
mapEngine.StaticLayers.Add("EverGreenClipLayer", clipLayer);
DrawImage();
btnClip.Enabled = false;
}
private ShapeFileFeatureLayer ClipShapeFile(ShapeFileFeatureLayer shapeFileFeatureLayer, string outputShapeFileFeatureLayerPath, AreaBaseShape ClippingShape)
{
//Gets the columns from the polygon based shapefile.
shapeFileFeatureLayer.Open();
Collection<DbfColumn> dbfColumns = ((ShapeFileFeatureSource)shapeFileFeatureLayer.FeatureSource).GetDbfColumns();
ShapeFileFeatureLayer.CreateShapeFile(ShapeFileType.Polygon, outputShapeFileFeatureLayerPath, dbfColumns);
ShapeFileFeatureSource clippedShapeFileFeatureSource = new ShapeFileFeatureSource(outputShapeFileFeatureLayerPath, ShapeFileReadWriteMode.ReadWrite);
//Gets the features with Spatial Query that will be used for the clipping.
Collection<Feature> features = shapeFileFeatureLayer.QueryTools.GetFeaturesIntersecting(ClippingShape, ReturningColumnsType.AllColumns);
shapeFileFeatureLayer.Close();
//Loops thru all the features from the Spatial Query.
clippedShapeFileFeatureSource.Open();
clippedShapeFileFeatureSource.BeginTransaction();
foreach (Feature feature in features)
{
//Gets the MultipolygonShape and clip it using GetIntersection geometric function.
MultipolygonShape currentMultiPolygonShape = (MultipolygonShape)(feature.GetShape());
MultipolygonShape overlapMultiPolygonShape = currentMultiPolygonShape.GetIntersection(ClippingShape);
//Adds the feature to the clipped layer with the clipped Multipolygon with its ColumnValues.
Dictionary<string, string> Columns = feature.ColumnValues;
Feature clippedFeature = new Feature(overlapMultiPolygonShape, Columns);
clippedShapeFileFeatureSource.AddFeature(clippedFeature);
}
clippedShapeFileFeatureSource.CommitTransaction();
clippedShapeFileFeatureSource.Close();
//Returns the clipped ShapeFileFeatureLayer.
ShapeFileFeatureLayer clippedShapeFileFeatureLayer = new ShapeFileFeatureLayer(outputShapeFileFeatureLayerPath);
return clippedShapeFileFeatureLayer;
}
private void DeleteClipFiles()
{
File.Delete(@"..\..\Data\evergreenclip.shp");
File.Delete(@"..\..\Data\evergreenclip.ids");
File.Delete(@"..\..\Data\evergreenclip.idx");
File.Delete(@"..\..\Data\evergreenclip.dbf");
File.Delete(@"..\..\Data\evergreenclip.shx");
}
private void DrawImage()
{
if (bitmap != null) { bitmap.Dispose(); }
bitmap = new Bitmap(Map.Width, Map.Height);
mapEngine.OpenAllLayers();
mapEngine.DrawStaticLayers(bitmap, GeographyUnit.DecimalDegree);
mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.DecimalDegree);
mapEngine.CloseAllLayers();
Map.Image = bitmap;
}
private void ToolBar_ButtonClick(object sender, ToolBarButtonClickEventArgs e)
{
switch (e.Button.Tag.ToString())
{
case "Zoom In":
mapEngine.CurrentExtent.ScaleDown(50);
break;
case "Zoom Out":
mapEngine.CurrentExtent.ScaleUp(50);
break;
case "Full Extent":
mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0), Map.Width, Map.Height);
break;
case "Pan Left":
mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Left, 20);
break;
case "Pan Right":
mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Right, 20);
break;
case "Pan Up":
mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Up, 20);
break;
case "Pan Down":
mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Down, 20);
break;
default:
break;
}
DrawImage();
}
private void btnClose_Click(object sender, EventArgs e)
{
this.Close();
}
}
}