Linetype Preview image using AccoreConsole

<?xml encoding=”UTF-8″>By Balaji Ramamoorthy

If you need a preview image for a linetype to show in a picture box or for any other purpose, AccoreConsole should come in handy. To get this working, pass-in a blank drawing to AccoreConsole and have your plugin that loads in AccoreConsole load the linetype and create lines associated with that linetype. After the lines have been created, generate a preview image by plotting it as PNG.

Here is a sample code for the above steps and the script file that loads in AccoreConsole :

[CommandMethod("LTypePreview")]
public void LTypePreviewMethod()
{
Document activeDoc =
Autodesk.AutoCAD.ApplicationServices.Core.Application.
DocumentManager.MdiActiveDocument;
Editor ed = activeDoc.Editor;
String ltypeName = "BATTING";
String linetypeFilePath = @"D:Tempacdb.lin";
Database db = activeDoc.Database;
using (Transaction trans
= db.TransactionManager.StartTransaction())
{
BlockTable bt = trans.GetObject(
db.BlockTableId,
OpenMode.ForRead) as BlockTable;
BlockTableRecord ms = trans.GetObject(
bt[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord;
LinetypeTable lineTypeTable =
trans.GetObject(
db.LinetypeTableId,
OpenMode.ForRead) as LinetypeTable;
bool isLinetypeLoaded
= lineTypeTable.Has(ltypeName);
if (!isLinetypeLoaded)
{// Not  loaded, try  loading the linetype
db.LoadLineTypeFile(ltypeName, linetypeFilePath);
}
double ltScale = 30;
ObjectId ltypeId = lineTypeTable[ltypeName];
double incrx = 64.0;
double incry = 48.0;
for (int cnt = 0; cnt < 10; cnt++)
{
if (cnt == 0)
{
Line line = new Line(
new Point3d(0.0, 0.0, 0.0),
new Point3d(640.0, 480.0, 0.0));
line.LinetypeScale = ltScale;
line.LinetypeId = ltypeId;
ms.AppendEntity(line);
trans.AddNewlyCreatedDBObject(line, true);
}
else
{
Line line1 = new Line(
new Point3d(cnt * incrx, 0.0, 0.0),
new Point3d(640.0, (10 - cnt) * incry,
0.0));
line1.LinetypeScale = ltScale;
line1.LinetypeId = ltypeId;
ms.AppendEntity(line1);
trans.AddNewlyCreatedDBObject(line1, true);
Line line2 = new Line(
new Point3d(0.0, cnt * incry, 0.0),
new Point3d((10 - cnt) * incrx,
480.0, 0.0));
line2.LinetypeScale = ltScale;
line2.LinetypeId = ltypeId;
ms.AppendEntity(line2);
trans.AddNewlyCreatedDBObject(line2, true);
}
}
trans.Commit();
}
if (System.IO.File.Exists("D:\Temp\Test.png"))
{
System.IO.File.Delete("D:\Temp\Test.png");
}
string deviceName = "PublishToWeb PNG.pc3";
string mediaName = "VGA (640.00 x 480.00 Pixels)";
using (Transaction tr
= db.TransactionManager.StartTransaction())
{
BlockTableRecord btr
= tr.GetObject(db.CurrentSpaceId, OpenMode.ForRead)
as BlockTableRecord;
Layout lo =
tr.GetObject(btr.LayoutId, OpenMode.ForRead)
as Layout;
PlotInfo pi = new PlotInfo();
pi.Layout = btr.LayoutId;
PlotSettings ps = new PlotSettings(lo.ModelType);
PlotConfigInfo pci = new PlotConfigInfo();
ps.CopyFrom(lo);
ps.PlotPlotStyles = true;
Extents2d windowpos
= new Extents2d(0.0, 0.0, 640.0, 480.0);
PlotSettingsValidator psv
= PlotSettingsValidator.Current;
psv.SetPlotWindowArea(ps, windowpos);
psv.SetPlotType(ps, PlotType.Window);
psv.SetUseStandardScale(ps, true);
ps.PrintLineweights = true;
psv.SetPlotConfigurationName
(ps, deviceName,
mediaName.Replace(" ", "_"));
psv.SetPlotCentered(ps, true);
psv.SetStdScaleType(ps,
StdScaleType.ScaleToFit);
psv.RefreshLists(ps);
pi.OverrideSettings = ps;
PlotInfoValidator piv
= new PlotInfoValidator();
piv.Validate(pi);
using (var pe
= PlotFactory.CreatePublishEngine())
{
pe.BeginPlot(null, null);
pe.BeginDocument(pi, activeDoc.Name,
null, 1, true, "D:\Temp\Test.png");
PlotPageInfo ppi = new PlotPageInfo();
pe.BeginPage(ppi, pi, true, null);
pe.BeginGenerateGraphics(null);
pe.EndGenerateGraphics(null);
pe.EndPage(null);
pe.EndDocument(null);
pe.EndPlot(null);
}
tr.Commit();
}
}

Here are a few sample linetype preview images generated using AccoreConsole :