本文整理汇总了C#中DotSpatial.Topology.Envelope.ToExtent方法的典型用法代码示例。如果您正苦于以下问题：C# Envelope.ToExtent方法的具体用法？C# Envelope.ToExtent怎么用？C# Envelope.ToExtent使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DotSpatial.Topology.Envelope的用法示例。
在下文中一共展示了Envelope.ToExtent方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: OnMouseUp
/// <summary>
/// Handles the Mouse Up situation
/// </summary>
/// <param name="e"></param>
protected override void OnMouseUp(GeoMouseArgs e)
{
e.Map.IsZoomedToMaxExtent = false;
bool handled = false;
_currentPoint = e.Location;
Map.Invalidate();
if (_isDragging)
{
if (_geoStartPoint != null && _startPoint != e.Location)
{
IEnvelope env = new Envelope(_geoStartPoint.X, e.GeographicLocation.X,
_geoStartPoint.Y, e.GeographicLocation.Y);
if (Math.Abs(e.X - _startPoint.X) > 1 && Math.Abs(e.Y - _startPoint.Y) > 1)
{
e.Map.ViewExtents = env.ToExtent();
handled = true;
}
}
}
_isDragging = false;
if (handled == false)
{
Rectangle r = e.Map.MapFrame.View;
int w = r.Width;
int h = r.Height;
if (e.Button == MouseButtons.Left)
{
r.Inflate(-r.Width / 4, -r.Height / 4);
// The mouse cursor should anchor the geographic location during zoom.
r.X += (e.X / 2) - w / 4;
r.Y += (e.Y / 2) - h / 4;
}
else
{
r.Inflate(r.Width / 2, r.Height / 2);
r.X += w / 2 - e.X;
r.Y += h / 2 - e.Y;
}
e.Map.MapFrame.View = r;
e.Map.MapFrame.ResetExtents();
}
base.OnMouseUp(e);
Map.IsBusy = false;
}示例2: LoadFeatureFromGeomProperty
private void LoadFeatureFromGeomProperty(DbSet dbSet, PropertyInfo propertyGeom)
{
Envelope env = new Envelope();
IDataService dataService = ServiceLocator.Current.GetInstance<IDataService>();
EntityTableInfo tableInfo = dataService.GetEntityTableInfo(dbSet.ElementType);
this.Lines.DataTable = this.CreateDataTable(dbSet.ElementType);
this.Points.DataTable = this.CreateDataTable(dbSet.ElementType);
this.Polygons.DataTable = this.CreateDataTable(dbSet.ElementType);
PropertyInfo propertyId = dbSet.ElementType.GetProperty("Id");
foreach (Object obj in dbSet)
{
Object data = propertyGeom.GetValue(obj);
if (data != null)
{
String strData = data.ToString();
Geometry geometry = this.CreateGeometryFromWkt(strData);
if (geometry != null)
{
env.ExpandToInclude(geometry.Envelope);
if (geometry is LineString || geometry is MultiLineString)
{
IFeature feature = this.Lines.AddFeature(geometry);
System.Data.DataRow row = this.Lines.DataTable.NewRow();
row.BeginEdit();
row["Id"] = (Int64)propertyId.GetValue(obj);
this.Lines.DataTable.Rows.Add(row);
feature.DataRow = row;
row.EndEdit();
}
else if (geometry is Point)
{
IFeature feature = this.Points.AddFeature(geometry);
System.Data.DataRow row = this.Points.DataTable.NewRow();
row.BeginEdit();
row["Id"] = (Int64)propertyId.GetValue(obj);
this.Points.DataTable.Rows.Add(row);
feature.DataRow = row;
row.EndEdit();
}
else if (geometry is Polygon)
{
IFeature feature = this.Polygons.AddFeature(geometry);
System.Data.DataRow row = this.Polygons.DataTable.NewRow();
row.BeginEdit();
row["Id"] = (Int64)propertyId.GetValue(obj);
this.Polygons.DataTable.Rows.Add(row);
feature.DataRow = row;
row.EndEdit();
}
}
}
}
this.Extent = env.ToExtent();
}示例3: LoadTemplate
private void LoadTemplate(TemplateViewModel template)
{
template.Nodes.Clear();
this.Map.Layers.Clear();
DbSet<SigNode> nodeSet = this.DataService.GetDbSet<SigNode>();
List<TemplateNodeLayerViewModel> layersNodes = new List<TemplateNodeLayerViewModel>();
this.RecurseLoadTemplate(nodeSet, template, template.Nodes, -1, layersNodes);
Envelope env = new Envelope();
layersNodes = (from ln in layersNodes where ln.Model.SigLayer != null orderby ln.Model.SigLayer.MapOrder select ln).ToList();
foreach (TemplateNodeLayerViewModel layersNode in layersNodes)
{
layersNode.CreateLayers();
if (layersNode.Envelope != null)
{ env.ExpandToInclude(layersNode.Envelope); }
foreach (IMapLayer mapLayer in layersNode.Layers)
{
this.Map.Layers.Add(mapLayer);
}
}
this.Map.ViewExtents = env.ToExtent();
}