/// <summary>
/// Adds a point to the current shape. If a shape is not yet initialized, it will initialize it.
/// </summary>
/// <param name="x">X coordinate in projected coordinates.</param>
/// <param name="y">Y coordinate in projected coordinates.</param>
internal void AddPoint(double x, double y)
{
if (m_Shape == null)
{
m_Shape = new ShapeClass();
}
if ((m_Shape.NumPoints > 0) && (m_SFType == lt.LineShapefile) && (m_Shape[m_Shape.NumPoints - 1].x == x) && (m_Shape[m_Shape.NumPoints - 1].y == y))
{
this.Close(); // a line tried to add two points to the end, meaning that the line is finished.
}
PointD newPoint = new PointD(x, y);
m_Shape.AddPoint(newPoint);
if (m_SFType == lt.PointShapefile) // point shapefiles can only have a single point.
{
this.Close();
}
if ((m_SFType == lt.PolygonShapefile) && (m_Shape.NumPoints > 2) && (m_Shape[0].x == newPoint.x) && (m_Shape[0].y == newPoint.y))
{
this.Close(); // a polygon or line has doubled back on itself.
}
}
/// <summary>
/// Constructor.
/// The AddShapeForm is used when creating a new shape.
/// The user can either click on the map to generate new points, lines or polygons, or input coordinates in the text boxes provided on the form.
/// </summary>
public AddShapeForm(GlobalFunctions g, ref SnapClass snapper)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
m_globals = g;
m_cursor = new System.Windows.Forms.Cursor(this.GetType(), "InsertPoint.cur");
view = g.MapWin.View;
m_oldCursorMode = view.CursorMode;
m_oldCursor = view.MapCursor;
m_oldCursorHandle = view.UserCursorHandle;
view.CursorMode = MapWinGIS.tkCursorMode.cmNone;
view.MapCursor = MapWinGIS.tkCursor.crsrWait;
m_SFType = g.MapWin.Layers[g.MapWin.Layers.CurrentLayer].LayerType;
m_Shape = new ShapeClass();
// Sign me up for these events!
m_MapMouseMoveDelegate = new MapWindow.Events.MapMouseMoveEvent(MouseMoveEvent);
g.Events.AddHandler(m_MapMouseMoveDelegate);
m_MapMouseUpDelegate = new MapWindow.Events.MapMouseUpEvent(MouseUpEvent);
g.Events.AddHandler(m_MapMouseUpDelegate);
m_LayerSelectedDelegate = new MapWindow.Events.LayerSelectedEvent(LayerSelectedEvent);
g.Events.AddHandler(m_LayerSelectedDelegate);
MapWindow.Interfaces.eLayerType t = g.MapWin.Layers[g.MapWin.Layers.CurrentLayer].LayerType;
m_sf = g.CurrentLayer;
if ((m_snapper == null) && ((t == lt.LineShapefile) || (t == lt.PointShapefile) || (t == lt.PolygonShapefile)))
{
m_snapper = new SnapClass(m_globals.MapWin);
}
view.MapCursor = MapWinGIS.tkCursor.crsrUserDefined;
view.UserCursorHandle = m_cursor.Handle.ToInt32();
m_PointSize = 6;
}
private void ResetForNew()
{
m_snapper = new SnapClass(m_globals.MapWin);
m_Shape = new ShapefileEditor.ShapeClass();
m_globals.UpdateButtons();
m_globals.DoEnables();
m_globals.UpdateView();
if (m_cursor == null)
{
m_cursor = new System.Windows.Forms.Cursor(this.GetType(), "InsertPoint.cur");
}
m_oldCursorMode = view.CursorMode;
m_oldCursor = view.MapCursor;
m_oldCursorHandle = view.UserCursorHandle;
view.CursorMode = MapWinGIS.tkCursorMode.cmNone;
view.MapCursor = MapWinGIS.tkCursor.crsrUserDefined;
view.UserCursorHandle = m_cursor.Handle.ToInt32();
}
/// <summary>
/// Finds the nearest point to the requested location that is within the tolerance radius.
/// </summary>
/// <param name="ProjectedRadius">The tolerance radius in projected units used to search for the nearest point that can be snapped to.</param>
/// <param name="x">x coordinate in projected map units</param>
/// <param name="y">y coordinate in projected map units</param>
/// <param name="curShape">The shape that is currently being created. Points from this shape are also checked.</param>
/// <param name="BestPoint">A PointD class with the location of the nearest point to snap to if there is are any within the tolerance, null if no points are found.</param>
/// <returns>Returns true if there is a point to snap to.</returns>
public bool CanSnap(double ProjectedRadius, double x, double y, ShapeClass curShape, ref System.Collections.ArrayList BestPoints)
{
System.Collections.IDictionaryEnumerator ie = m_lists.GetEnumerator();
PointD myBest = null;
System.Collections.ArrayList myBestPoints = null;
while (ie.MoveNext())
{
int snaplayeridx = (int)ie.Key;
// find any points that are within the tolerance in curShape.
for (int i = 0; i < curShape.NumPoints; i++)
{
PointD pt = curShape[i];
double d = pt.Dist(x, y);
if (d < ProjectedRadius)
{
if (myBest != null)
{
if (d < myBest.Dist(x, y))
{
myBest = pt;
}
}
else
{
myBest = pt;
}
}
}
if (myBest != null)
{
SnapData d = new SnapData(-1, -1, myBest);
myBestPoints = new System.Collections.ArrayList();
myBestPoints.Add(d);
}
if (CanSnap(ProjectedRadius, x, y, ref BestPoints))
{ // work with that best point.
if (myBest != null)
{
PointD tPoint = ((SnapData)BestPoints[0]).point;
if (myBest.Dist(x, y) < tPoint.Dist(x, y))
{
if (BestPoints == null)
{
BestPoints = new System.Collections.ArrayList();
}
BestPoints.AddRange(myBestPoints);
}
}
}
else
{
if (myBestPoints != null)
{
if (BestPoints == null)
{
BestPoints = new System.Collections.ArrayList();
}
BestPoints.AddRange(myBestPoints);
}
}
}
if (BestPoints == null)
{
return(false);
}
else
{
return(true);
}
}
private void AddShape(ShapeClass s)
{
if (m_SFType == MapWindow.Interfaces.eLayerType.LineShapefile)
{
if (s.NumPoints < 2)
{
ResetForNew();
MapWinUtility.Logger.Message("You must add at least two points for a line.", "Not Enough Points", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, DialogResult.OK);
return;
}
}
else if (m_SFType == MapWindow.Interfaces.eLayerType.PolygonShapefile)
{
// 3 + 1 for termination point - first must equal last, meaning we have to have 4 for a polygon
if (s.NumPoints < 4)
{
ResetForNew();
MapWinUtility.Logger.Message("You must add at least three points for a polygon.", "Not Enough Points", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, DialogResult.OK);
return;
}
}
if (m_sf.EditingShapes == false)
{
if (m_sf.StartEditingShapes(true, null) == false)
{
MapWinUtility.Logger.Msg("Could not edit the shapefile.", "Error");
if (!GlobalFunctions.m_StayInAddMode)
{
this.Close();
}
else
{
ResetForNew();
}
return;
}
}
int newIndex = m_sf.NumShapes;
MapWinGIS.Shape shp = s.ToMWShape(m_sf.ShapefileType);
//MapWinGIS.ShapefileColorScheme cs = m_globals.MapWin.Layers[m_globals.MapWin.Layers.CurrentLayer].ColoringScheme;
if (m_sf.EditInsertShape(shp, ref newIndex) == false)
{
MapWinUtility.Logger.Msg("Failed to add the new shape to the shapefile.", "Error");
}
else
{
if (m_snapper != null)
{
m_snapper.AddShapeData(newIndex, m_globals.MapWin.Layers.CurrentLayer);
}
// Save
if (m_sf.EditingShapes == true)
{
m_globals.CreateUndoPoint();
m_sf.StopEditingShapes(true, true, null);
}
m_globals.MapWin.Plugins.BroadcastMessage("ShapefileEditor: Layer " + m_globals.MapWin.Layers.CurrentLayer.ToString() + ": New Shape Added");
}
m_globals.MapWin.View.Draw.ClearDrawing(m_drawHandle);
if (!GlobalFunctions.m_StayInAddMode)
{
this.Close();
}
else
{
ResetForNew();
}
}
