Jigging text block along selected polyline.
You should get some inspiration from this one.
[CommandMethod("JIGTEXT")]
public static void JigTextAlonPpolyline()
{
var doc = Application.DocumentManager.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var entityOptions = new PromptEntityOptions("\nSelect polyline: ");
entityOptions.SetRejectMessage("\nmust be a Polyline.");
entityOptions.AddAllowedClass(typeof(Polyline), true);
var entityResult = ed.GetEntity(entityOptions);
if (entityResult.Status != PromptStatus.OK)
return;
var stringOptions = new PromptStringOptions("\nEnter a text: ");
stringOptions.AllowSpaces = true;
var stringResult = ed.GetString(stringOptions);
if (stringResult.Status != PromptStatus.OK)
return;
using (var tr = db.TransactionManager.StartTransaction())
{
var pline = (Polyline)tr.GetObject(entityResult.ObjectId, OpenMode.ForRead);
using (var text = new DBText())
{
text.SetDatabaseDefaults();
text.Normal = pline.Normal;
text.Justify = AttachmentPoint.BottomCenter;
text.AlignmentPoint = Point3d.Origin;
text.TextString = stringResult.StringResult;
var jig = new TextJig(text, pline);
var result = ed.Drag(jig);
if (result.Status == PromptStatus.OK)
{
var currentSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
currentSpace.AppendEntity(text);
tr.AddNewlyCreatedDBObject(text, true);
}
}
tr.Commit();
}
}
class TextJig : EntityJig
{
DBText text;
Polyline pline;
Point3d dragPt;
Plane plane;
Database db;
public TextJig(DBText text, Polyline pline) : base(text)
{
this.text = text;
this.pline = pline;
plane = new Plane(Point3d.Origin, pline.Normal);
db = HostApplicationServices.WorkingDatabase;
}
protected override SamplerStatus Sampler(JigPrompts prompts)
{
var options = new JigPromptPointOptions("\nSpecicfy insertion point: ");
options.UserInputControls =
UserInputControls.Accept3dCoordinates |
UserInputControls.UseBasePointElevation;
var result = prompts.AcquirePoint(options);
if (result.Value.IsEqualTo(dragPt))
return SamplerStatus.NoChange;
dragPt = result.Value;
return SamplerStatus.OK;
}
protected override bool Update()
{
var point = pline.GetClosestPointTo(dragPt, false);
var angle = pline.GetFirstDerivative(point).AngleOnPlane(plane);
text.AlignmentPoint = point;
text.Rotation = angle;
text.AdjustAlignment(db);
return true;
}
}
This is NOT your first requirement.
In the first maeesage you said: "I will select a polyline on drawing and enter some text, on OK click I have to move the text along the polyline."
By respect to those who try to help you, please do not change the requirements in the same thread.
From the upper code and this one in another post of yours, you should be able to achieve what you want.
Accepted solution
Try this.
[CommandMethod("JIGBLOCK")]
public static void JigBlockAlongPolyline()
{
var doc = AcAp.DocumentManager.MdiActiveDocument;
var db = doc.Database;
var ed = doc.Editor;
var entityOptions = new PromptEntityOptions("\nSelect polyline: ");
entityOptions.SetRejectMessage("\nmust be a Polyline.");
entityOptions.AddAllowedClass(typeof(Polyline), true);
var entityResult = ed.GetEntity(entityOptions);
if (entityResult.Status != PromptStatus.OK)
return;
var stringOptions = new PromptStringOptions("\nEnter the block name: ");
var stringResult = ed.GetString(stringOptions);
if (stringResult.Status != PromptStatus.OK)
return;
var blockName = stringResult.StringResult;
using (var tr = db.TransactionManager.StartTransaction())
{
var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
if (!bt.Has(blockName))
return;
var pline = (Polyline)tr.GetObject(entityResult.ObjectId, OpenMode.ForRead);
var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
var btrId = bt[blockName];
var br = new BlockReference(Point3d.Origin, btrId);
curSpace.AppendEntity(br);
tr.AddNewlyCreatedDBObject(br, true);
var btr = (BlockTableRecord)tr.GetObject(btrId, OpenMode.ForRead);
var attInfos = new Dictionary<AttributeReference, TextInfo>();
foreach (ObjectId id in btr)
{
if (id.ObjectClass.Name == "AcDbAttributeDefinition")
{
var attDef = (AttributeDefinition)tr.GetObject(id, OpenMode.ForRead);
AttributeReference attRef = new AttributeReference();
attRef.SetAttributeFromBlock(attDef, br.BlockTransform);
br.AttributeCollection.AppendAttribute(attRef);
tr.AddNewlyCreatedDBObject(attRef, true);
attInfos.Add(attRef, new TextInfo(attDef));
}
}
var jig = new BlockJig(br, pline, attInfos);
var pr = ed.Drag(jig);
if (pr.Status != PromptStatus.OK)
br.Erase();
tr.Commit();
}
}
class TextInfo
{
public Point3d Position { get; }
public Point3d Alignment { get; }
public bool IsAligned { get; }
public double Rotation { get; }
public TextInfo(DBText text)
{
Position = text.Position;
IsAligned = text.Justify != AttachmentPoint.BaseLeft;
Alignment = text.AlignmentPoint;
Rotation = text.Rotation;
}
}
class BlockJig : EntityJig
{
BlockReference br;
Polyline pline;
Point3d dragPt;
Plane plane;
Dictionary<AttributeReference, TextInfo> attInfos;
public BlockJig(BlockReference br, Polyline pline, Dictionary<AttributeReference, TextInfo> attInfos) : base(br)
{
this.br = br;
this.pline = pline;
this.attInfos = attInfos;
plane = new Plane(Point3d.Origin, pline.Normal);
}
protected override SamplerStatus Sampler(JigPrompts prompts)
{
var options = new JigPromptPointOptions("\nSpecicfy insertion point: ");
options.UserInputControls =
UserInputControls.Accept3dCoordinates |
UserInputControls.UseBasePointElevation;
var result = prompts.AcquirePoint(options);
if (result.Value.IsEqualTo(dragPt))
return SamplerStatus.NoChange;
dragPt = result.Value;
return SamplerStatus.OK;
}
protected override bool Update()
{
var point = pline.GetClosestPointTo(dragPt, false);
var angle = pline.GetFirstDerivative(point).AngleOnPlane(plane);
br.Position = point;
br.Rotation = angle;
foreach (var entry in attInfos)
{
var att = entry.Key;
var info = entry.Value;
att.Position = info.Position.TransformBy(br.BlockTransform);
att.Rotation = info.Rotation + angle;
if (info.IsAligned)
{
att.AlignmentPoint = info.Alignment.TransformBy(br.BlockTransform);
att.AdjustAlignment(br.Database);
}
if (att.IsMTextAttribute)
{
att.UpdateMTextAttribute();
}
}
return true;
}
}
I cannot understand why you keep on trying to do it with a DrawJig despite the fact all examples I provided use an EntityJig.
As said before, I think jigging a single entity is simpler with an EntityJig. If you absolutely want to use a DrawJig, do it so but I won't follow you on this route.
Accepted solution
You need to PI radians (180°) to the rotation angle when its cosine is negative (i.e. [90°-270°] range)
protected override bool Update()
{
var point = pline.GetClosestPointTo(dragPt, false);
var angle = pline.GetFirstDerivative(point).AngleOnPlane(plane);
if (Math.Cos(angle) < 0.0)
angle += Math.PI;
br.Position = point;
br.Rotation = angle;
foreach (var entry in attInfos)
{
var att = entry.Key;
var info = entry.Value;
att.Position = info.Position.TransformBy(br.BlockTransform);
att.Rotation = info.Rotation + angle;
if (info.IsAligned)
{
att.AlignmentPoint = info.Alignment.TransformBy(br.BlockTransform);
att.AdjustAlignment(br.Database);
}
if (att.IsMTextAttribute)
{
att.UpdateMTextAttribute();
}
}
return true;
}
Hi _gile,
Thanks for your response, actually I understood where I got deviated. I got the issue fixed. I calculated a perpendicular point to the block position and gave it to the attribute position, and the issue got fixed.
Thanks a lot for the guidance.
Teja.
