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284 lines (244 loc) · 9.97 KB
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using Common.Logging;
using GeoAPI.Geometries;
using SharpMap;
using SharpMap.Data;
using SharpMap.Forms;
using SharpMap.Forms.Tools;
using SharpMap.Layers;
namespace WinFormSamples
{
public class SampleTool : MapTool, IDisposable
{
private ILog Logger = LogManager.GetLogger(typeof(SampleTool));
public SampleTool() : base("Sample", "A sample tool that does nothing really useful")
{
Logger.Debug(fmh => fmh("Created \"{0}\"-Tool, {1}", Name,Description));
Enabled = true;
}
void IDisposable.Dispose()
{
HandleCancel();
}
private ToolTip _toolTip;
public SampleTool(MapBox mapBox1) : this()
{
MapControl = mapBox1;
MapControl.MapChanged += (sender, args) => { HandleCancel(); };
_cts.Token.Register(HandleCancel);
}
public override bool DoKeyDown(Coordinate mapPosition, KeyEventArgs keyEventArgs)
{
Logger.Debug(fmh => fmh("KeyDown {1} at {0}", mapPosition, keyEventArgs.KeyCode));
return base.DoKeyDown(mapPosition, keyEventArgs);
}
public override bool DoKeyUp(Coordinate mapPosition, KeyEventArgs keyEventArgs)
{
Logger.Debug(fmh => fmh("KeyUp {1} at {0}", mapPosition, keyEventArgs.KeyCode));
return base.DoKeyUp(mapPosition, keyEventArgs);
}
public override bool DoMouseDoubleClick(Coordinate mapPosition, MouseEventArgs mouseEventArgs)
{
Logger.Debug(fmh => fmh("MouseDoubleClick {1} at {0}", mapPosition, mouseEventArgs.Button));
return base.DoMouseDoubleClick(mapPosition, mouseEventArgs);
}
public override bool DoMouseDown(Coordinate mapPosition, MouseEventArgs mouseEventArgs)
{
Logger.Debug(fmh => fmh("MouseDown {1} at {0}", mapPosition, mouseEventArgs.Button));
return base.DoMouseDown(mapPosition, mouseEventArgs);
}
public override bool DoMouseEnter()
{
Logger.Debug(fmh => fmh("MouseEnter"));
return base.DoMouseEnter();
}
protected override void OnEnabledChanged(EventArgs e)
{
base.OnEnabledChanged(e);
if (!Enabled)
{
if (_toolTip != null) _toolTip.RemoveAll();
}
}
private CancellationTokenSource _cts = new CancellationTokenSource();
public override bool DoMouseHover(Coordinate mapPosition)
{
Logger.Debug(fmh => fmh("MouseHover at {0}", mapPosition));
_cts.Cancel();
_cts.Token.WaitHandle.WaitOne();
_cts.Dispose();
_cts = new CancellationTokenSource();
_cts.Token.Register(HandleCancel);
var t = new Task<FeatureDataRow>(FindGeoNearPoint, mapPosition, _cts.Token);
t.Start();
t.ContinueWith(res => ShowToolTip(res.Result));
return base.DoMouseHover(mapPosition);
}
BackgroundWorker _bw = new BackgroundWorker();
void HandleCancel()
{
if (_toolTip != null)
{
MapControl.Invoke(new MethodInvoker(() =>
{
_toolTip.Hide(MapControl);
_toolTip.Dispose();
}));
_toolTip = null;
}
}
private void ShowToolTip(FeatureDataRow fdr)
{
if (fdr != null)
{
MapControl.BeginInvoke(new Action(() =>
{
var _t = new ToolTip();
_toolTip = _t;
_t/*oolTip*/.ToolTipTitle = fdr.Table.TableName;
_t/*oolTip*/.Show(ToText(fdr), MapControl);
}));
}
else
{
//MapControl.BeginInvoke(new MethodInvoker( () => _toolTip.Hide(MapControl)));
}
}
private string ToText(FeatureDataRow fdr)
{
var sb = new StringBuilder();
if (fdr.Geometry != null)
{
sb.AppendFormat("Geometry:\n Type: {0}\n SRID: {1}\n",
fdr.Geometry.GeometryType, fdr.Geometry.SRID);
switch (fdr.Geometry.Dimension)
{
case Dimension.Surface:
sb.AppendFormat(" Area: {0}\n", fdr.Geometry.Area);
break;
case Dimension.Curve:
sb.AppendFormat(" Length: {0}\n", fdr.Geometry.Length);
break;
case Dimension.Point:
sb.AppendFormat(" Position: {0}\n", fdr.Geometry.AsText());
break;
}
}
sb.Append("Data:\n");
foreach (DataColumn col in fdr.Table.Columns)
sb.AppendFormat(" {0}: {1}\n", col.Caption, fdr[col] == DBNull.Value ? "NULL" : fdr[col]);
Logger.Debug(fmh => fmh("\n{0}\n{1}", fdr.Table.TableName, sb.ToString(0, sb.Length-1)));
return sb.ToString(0, sb.Length - 1);
}
private FeatureDataRow FindGeoNearPoint(object/*Coordinate*/ coord)
{
var mapPosition = (Coordinate) coord;
var env = new Envelope(mapPosition);
env.ExpandBy(5 * Map.PixelWidth);
var g = NetTopologySuite.Geometries.Prepared.PreparedGeometryFactory.Prepare(Map.Factory.ToGeometry(env));
var fdrs = new List<Tuple<double, FeatureDataRow>>();
var fds = new FeatureDataSet();
var tableCount = 0;
var layersToQuery = GetLayersToQuery(Map);
for (var i = layersToQuery.Count - 1; i >= 0; i--)
{
if (_cts.Token.IsCancellationRequested)
{
Logger.Debug("Cancellation requested");
return null;
}
var l = layersToQuery[i];
if (l.Enabled && l.MinVisible < Map.Zoom &&
l.MaxVisible >= Map.Zoom)
{
if (!l.IsQueryEnabled) continue;
l.ExecuteIntersectionQuery(env, fds);
for (var j = tableCount; j < fds.Tables.Count; j++)
{
var fdt = fds.Tables[j];
for (var k = 0; k < fdt.Rows.Count; k++)
{
var fdr = (FeatureDataRow) fdt.Rows[k];
if (g.Intersects(fdr.Geometry))
{
var distance = g.Geometry.InteriorPoint.Distance(fdr.Geometry);
if (fdr.Geometry.Dimension == Dimension.Surface)
distance += 5* Map.PixelWidth;
fdrs.Add(Tuple.Create(distance, fdr));
}
}
}
tableCount = fds.Tables.Count;
}
}
if (fdrs.Count > 0)
{
fdrs.Sort((t1, t2) => t1.Item1.CompareTo(t2.Item1));
return fdrs[0].Item2;
}
return null;
}
private static List<ICanQueryLayer> GetLayersToQuery(Map map)
{
var res = new List<ICanQueryLayer>();
for (var i = 0; i < map.BackgroundLayer.Count; i++)
{
if (map.BackgroundLayer[i] is ICanQueryLayer)
{
if (((ICanQueryLayer)map.BackgroundLayer[i]).IsQueryEnabled)
res.Add((ICanQueryLayer)map.BackgroundLayer[i]);
}
}
for (var i = 0; i < map.Layers.Count; i++)
{
if (map.Layers[i] is ICanQueryLayer)
{
if (((ICanQueryLayer)map.Layers[i]).IsQueryEnabled)
res.Add((ICanQueryLayer)map.Layers[i]);
}
}
return res;
}
public MapBox MapControl { get; private set; }
public override bool DoMouseLeave()
{
Logger.Debug(fmh => fmh("MouseLeave"));
//_toolTip.RemoveAll();
return base.DoMouseLeave();
}
public override bool DoMouseMove(Coordinate mapPosition, MouseEventArgs mouseEventArgs)
{
Logger.Debug(fmh => fmh("MouseMove {1} at {0}", mapPosition, mouseEventArgs.Button));
//_toolTip.RemoveAll();
return base.DoMouseMove(mapPosition, mouseEventArgs);
}
public override bool DoMouseUp(Coordinate mapPosition, MouseEventArgs mouseEventArgs)
{
Logger.Debug(fmh => fmh("MouseUp {1} at {0}", mapPosition, mouseEventArgs.Button));
return base.DoMouseUp(mapPosition, mouseEventArgs);
}
public override bool DoMouseWheel(Coordinate mapPosition, MouseEventArgs mouseEventArgs)
{
Logger.Debug(fmh => fmh("MouseWheel {1} at {0}", mapPosition, mouseEventArgs.Button));
return base.DoMouseWheel(mapPosition, mouseEventArgs);
}
public override void Cancel()
{
Logger.Debug(fmh => fmh("Cancel"));
base.Cancel();
}
public override void DoPaint(PaintEventArgs e)
{
Logger.Debug(fmh => fmh("Paint"));
base.DoPaint(e);
}
}
}
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