//显示重载
public override bool WorldDraw(Drawable drawable, WorldDraw wd)
{
LArrow3 la = new LArrow3(drawable);
la.WorldDraw(wd);
return(base.WorldDraw(drawable, wd));
}
//获取夹点,简单实体应重载该函数以获取更灵活的控制
public override void GetGripPoints(Entity entity, GripDataCollection grips, double curViewUnitSize, int gripSize, Vector3d curViewDir, GetGripPointsFlags bitFlags)
{
LArrow3 la = new LArrow3(entity);
base.GetGripPoints(entity, grips, curViewUnitSize, gripSize, curViewDir, bitFlags);
grips.Remove(grips[2]);
grips.Add(new LArrowGripData3(la.Position));
}
//移动夹点
public override void MoveGripPointsAt(Entity entity, GripDataCollection grips, Vector3d offset, MoveGripPointsFlags bitFlags)
{
LArrow3 la = new LArrow3(entity);
foreach (GripData gd in grips)
{
if (gd is LArrowGripData3)
{
LArrowGripData3 lagd = (LArrowGripData3)gd;
lagd.Move(la, offset);
}
}
for (int i = grips.Count - 1; i >= 0; i--)
{
if (grips[i] is LArrowGripData3)
{
grips.Remove(grips[i]);
}
}
if (grips.Count > 0)
{
base.MoveGripPointsAt(entity, grips, offset, bitFlags);
}
}
public void Move(LArrow3 la, Vector3d vec)
{
la.Position += vec;
la.SaveExtendedData();
}
void IExtensionApplication.Terminate()
{
LArrow3.OverruleEnd();
Overrule.Overruling = false;
}
public static void DoIt()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Editor ed = doc.Editor;
PromptDoubleOptions optDouble = new PromptDoubleOptions("\n请输入箭头长度:");
optDouble.AllowNone = true;
optDouble.AllowZero = false;
optDouble.DefaultValue = CurrArrowLength;
optDouble.UseDefaultValue = true;
PromptDoubleResult resDouble = ed.GetDouble(optDouble);
if (resDouble.Status == PromptStatus.OK)
{
//改变箭头长度设定值
CurrArrowLength = resDouble.Value;
PromptPointResult resStartPoint = ed.GetPoint("\n请输入起点:");
if (resStartPoint.Status == PromptStatus.OK)
{
PromptPointOptions optEndPoint = new PromptPointOptions("\n请输入终点:");
optEndPoint.BasePoint = resStartPoint.Value;
optEndPoint.UseBasePoint = true;
PromptPointResult resEndPoint = ed.GetPoint(optEndPoint);
if (resEndPoint.Status == PromptStatus.OK)
{
Point3d startpnt = resStartPoint.Value;
Point3d endpnt = resEndPoint.Value;
Database db = doc.Database;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
BlockTableRecord btr =
(BlockTableRecord)tr.GetObject(
db.CurrentSpaceId,
OpenMode.ForWrite,
false);
Line line = new Line(startpnt, endpnt);
btr.AppendEntity(line);
tr.AddNewlyCreatedDBObject(line, true);
RegAppTable rat =
(RegAppTable)tr.GetObject(
db.RegAppTableId,
OpenMode.ForRead,
false);
if (!rat.Has(RegAppName))
{
rat.UpgradeOpen();
RegAppTableRecord regapp = new RegAppTableRecord();
regapp.Name = RegAppName;
rat.Add(regapp);
tr.AddNewlyCreatedDBObject(regapp, true);
}
Point3d midpnt = (startpnt + endpnt.GetAsVector()) / 2;
LArrow3 la = new LArrow3(line);
//附着当前设定的箭头长度
la.ArrowLength = CurrArrowLength;
la.Scale = 0.5;
la.SaveExtendedData();
tr.Commit();
}
}
}
}
}
void IExtensionApplication.Initialize()
{
LArrow3.OverruleStart();
Overrule.Overruling = true;
}