====== Source Code WpfDesktopEditionSample CustomRotationProjection CS 110127.zip ======
====App.xaml.cs====
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;
namespace CustomRotationProjection
{
///
/// Interaction logic for App.xaml
///
public partial class App : Application
{
}
}
====CustomRotationProjection.cs====
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ThinkGeo.MapSuite.Core;
namespace Projections
{
//This projection class allows to project and rotate at the same time.
class CustomRotationProjection : Projection, IDisposable
{
private ManagedProj4Projection proj4 = new ManagedProj4Projection();
private RotationProjection rotateProjection = new RotationProjection();
private double angle;
private Vertex pivotVertex;
public CustomRotationProjection()
: base()
{
}
public CustomRotationProjection( String InternalProjectionString, String ExternalProjectionString)
: base()
{
proj4.InternalProjectionParametersString = InternalProjectionString;
proj4.ExternalProjectionParametersString = ExternalProjectionString;
}
public string InternalProjectionString
{
get
{
return proj4.InternalProjectionParametersString;
}
set
{
proj4.InternalProjectionParametersString = value;
}
}
public string ExternalProjectionString
{
get
{
return proj4.ExternalProjectionParametersString;
}
set
{
proj4.ExternalProjectionParametersString = value;
}
}
public double Angle
{
get
{
return angle;
}
set
{
angle = value;
rotateProjection.Angle = angle;
}
}
public Vertex PivotVertex
{
get
{
return pivotVertex;
}
set
{
pivotVertex = value;
}
}
protected override Vertex[] ConvertToExternalProjectionCore(double[] x, double[] y)
{
//First, converts to the external projection
Vertex[] projVertices = new Vertex[x.Length];
proj4.Open();
for (int i = 0; i < projVertices.Length; i++)
{
projVertices[i] = proj4.ConvertToExternalProjection(x[i], y[i]);
}
proj4.Close();
Vertex[] rotateVertices = new Vertex[x.Length];
//Second, rotates based on angle and pivot point.
for (int i = 0; i < rotateVertices.Length; i++)
{
rotateVertices[i] = RotateVertex(projVertices[i].X, projVertices[i].Y, angle);
}
return rotateVertices;
}
private Vertex RotateVertex(double x, double y, double angle)
{
Vertex rotatedVertex = new Vertex(x, y);
if ((angle % 360) != 0)
{
double rotatedX = x;
double rotatedY = y;
double distanceToPivot = Math.Sqrt(Math.Pow((x - pivotVertex.X), 2) + Math.Pow((y - pivotVertex.Y), 2));
if (distanceToPivot != 0)
{
double beta = Math.Atan((y - pivotVertex.Y) / (x - pivotVertex.X));
if ((beta <= 0 | y < pivotVertex.Y) && x < pivotVertex.X)
{
beta = Math.PI + beta;
}
double radiantAngle = angle * Math.PI / 180;
rotatedX = (distanceToPivot * Math.Cos(radiantAngle + beta)) + pivotVertex.X;
rotatedY = (distanceToPivot * Math.Sin(radiantAngle + beta)) + pivotVertex.Y;
}
rotatedVertex = new Vertex(rotatedX, rotatedY);
}
return rotatedVertex;
}
protected override Vertex[] ConvertToInternalProjectionCore(double[] x, double[] y)
{
//Converts back to internal projection with the rotation.
Vertex[] vertices = new Vertex[x.Length];
proj4.Open();
for (int i = 0; i < vertices.Length; i++)
{
vertices[i] = proj4.ConvertToInternalProjection(x[i], y[i]);
}
proj4.Close();
return vertices;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
Close();
}
}
}
====TestWindow.xaml.cs====
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.WpfDesktopEdition;
namespace CustomRotationProjection
{
///
/// Interaction logic for TestWindow.xaml
///
public partial class TestWindow : Window
{
private Projections.CustomRotationProjection customRotationProjection;
public TestWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
//Sets the correct map unit and the extent of the map.
wpfMap1.MapUnit = GeographyUnit.Meter;
wpfMap1.CurrentExtent = new RectangleShape(-10782920,3912077,-10779783,3910188);
wpfMap1.Background = new SolidColorBrush(Color.FromRgb(148, 196, 243));
GoogleMapsOverlay googleMapsOverlay = new GoogleMapsOverlay();
wpfMap1.Overlays.Add(googleMapsOverlay);
//Custom projection that will allow to project from State Plane Central North Texas to Spherical Mercator while applying a rotation.
customRotationProjection = new Projections.CustomRotationProjection(ManagedProj4Projection.GetEsriParametersString(102738),
ManagedProj4Projection.GetGoogleMapParametersString());
ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(@"../../data/Streets_subset.shp");
streetLayer.DrawingMarginPercentage = 100;
streetLayer.FeatureSource.Projection = customRotationProjection;
streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle
(GeoColor.StandardColors.Red, 3, GeoColor.FromArgb(255, GeoColor.StandardColors.Black), 5, true);
streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
LayerOverlay layerOverlay = new LayerOverlay();
layerOverlay.Layers.Add("StreetLayer", streetLayer);
wpfMap1.Overlays.Add("StreetOverlay", layerOverlay);
//Sets the pivot point to be the center of the layer.
streetLayer.Open();
customRotationProjection.PivotVertex = new Vertex(streetLayer.GetBoundingBox().GetCenterPoint());
streetLayer.Close();
customRotationProjection.Angle = 20;
wpfMap1.Refresh();
}
private void btnRotateClockWise_Click(object sender, RoutedEventArgs e)
{
LayerOverlay streetLayerOverlay = (LayerOverlay)wpfMap1.Overlays["StreetOverlay"];
ShapeFileFeatureLayer streetLayer = (ShapeFileFeatureLayer)streetLayerOverlay.Layers["StreetLayer"];
//Set the Angle property of RotationProjection. Substract 5 to go clockwise.
streetLayer.Open();
customRotationProjection.Angle = customRotationProjection.Angle - 5;
streetLayer.Close();
wpfMap1.Refresh(streetLayerOverlay);
}
private void btnRotateCounterClockWise_Click(object sender, RoutedEventArgs e)
{
LayerOverlay streetLayerOverlay = (LayerOverlay)wpfMap1.Overlays["StreetOverlay"];
ShapeFileFeatureLayer streetLayer = (ShapeFileFeatureLayer)streetLayerOverlay.Layers["StreetLayer"];
//Set the Angle property of RotationProjection. Adds 5 to go clockwise.
streetLayer.Open();
customRotationProjection.Angle = customRotationProjection.Angle + 5;
streetLayer.Close();
wpfMap1.Refresh(streetLayerOverlay);
}
private void wpfMap1_MouseMove(object sender, MouseEventArgs e)
{
//Gets the PointShape in world coordinates from screen coordinates.
Point point = e.MouseDevice.GetPosition(null);
ScreenPointF screenPointF = new ScreenPointF((float)point.X, (float)point.Y);
PointShape pointShape = ExtentHelper.ToWorldCoordinate(wpfMap1.CurrentExtent, screenPointF, (float)wpfMap1.Width, (float)wpfMap1.Height);
textBox1.Text = "X: " + Math.Round(pointShape.X) +
" Y: " + Math.Round(pointShape.Y);
}
}
}