Adding a viewport to a layout.

[gswifort]

How do I correctly add a viewport to a layout?
The code below causes incorrect behavior; it always adds one additional viewport (I open the file without viewports, add one, save, open, and there are two). I noticed that after adding a viewport, the .getViewportArray() method returns an empty list.

from pathlib import Path

from pyrx import Db, Ge, command


@command
def demo5():
    dwg_path = Path("test.dwg").absolute()
    db = Db.Database(False, True)
    db.readDwgFile(str(dwg_path))
    db.closeInput(True)
    layout_name, layout_id = get_layout(db)
    print(f"Layout name: {layout_name}")
    print_vport_array(layout_id)
    # vports=[PyDb.ObjectId(3b19cf308d0)]
    add_vport(layout_id)
    print_vport_array(layout_id)
    # vports=[]
    out = dwg_path.with_stem(dwg_path.stem + "_out")
    db.saveAs(str(out))
    print(f"Saved to {out}")


def get_layout(db: Db.Database) -> tuple[str, Db.ObjectId]:
    ld = Db.Dictionary(db.layoutDictionaryId())
    for name, id_ in ld:
        layout = Db.Layout(id_)
        if not layout.modelType():
            return name, id_
    raise ValueError("No layout found")


def print_vport_array(layout_id: Db.ObjectId):
    layout = Db.Layout(layout_id)
    print(f"vports={layout.getViewportArray()}")


def add_vport(layout_id: Db.ObjectId):
    btr = Db.BlockTableRecord(Db.Layout(layout_id).getBlockTableRecordId(), Db.OpenMode.kForWrite)
    vport = Db.Viewport()
    vport.setWidth(100.0)
    vport.setHeight(100.0)
    vport.setCenterPoint(Ge.Point3d(50.0, 50.0, 0.0))
    btr.appendAcDbEntity(vport)

[CEXT-Dan]

does this work for you?

def add_vport(layout_id: Db.ObjectId):
    man = Ap.LayoutManager()
    man.setCurrentLayoutId(layout_id)
    sym = Db.SymUtilServices()
    btrid = sym.blockPaperSpaceId(layout_id.database())
    btr = Db.BlockTableRecord(btrid, Db.OpenMode.kForWrite)
    vport = Db.Viewport()
    vport.setWidth(100.0)
    vport.setHeight(100.0)
    vport.setCenterPoint(Ge.Point3d(50.0, 50.0, 0.0))
    btr.appendAcDbEntity(vport)

[gswifort]

no, the result is the same

[gswifort]

as always, everything works for Db.curDb()

[CEXT-Dan]

try setting the working database

def add_vport(layout_id: Db.ObjectId):
    wdb = Db.AutoWorkingDatabase(layout_id.database())
    man = Ap.LayoutManager()
    man.setCurrentLayoutId(layout_id)
    sym = Db.SymUtilServices()
    btrid = sym.blockPaperSpaceId(layout_id.database())
    btr = Db.BlockTableRecord(btrid, Db.OpenMode.kForWrite)
    vport = Db.Viewport()
    vport.setWidth(100.0)
    vport.setHeight(100.0)
    vport.setCenterPoint(Ge.Point3d(50.0, 50.0, 0.0))
    btr.appendAcDbEntity(vport)

[CEXT-Dan]

can you check where or not it works for you in AutoCAD

[gswifort]

It works in autocad

vports=[PyDb.ObjectId(2144b1fdc60)]
vports=[PyDb.ObjectId(2144b1fdc60), PyDb.ObjectId(2144b1fdde0)]

[CEXT-Dan]

I tried a couple workarounds; I could not get it to work. unfortunately, I don’t know where the bug is. Maybe reach out to ZwCAD and ask for a sample in ObjectARX of creating a viewport in a side database.

[gswifort]

Will this be the equivalent of my code in ARX?

void addVport(const AcDbObjectId& layoutId)
{
    AcDbLayout* pLayout = nullptr;
    if (acdbOpenObject(pLayout, layoutId, AcDb::kForRead) != Acad::eOk || pLayout == nullptr)
        return;

    AcDbObjectId btrId = pLayout->getBlockTableRecordId();
    pLayout->close();

    AcDbBlockTableRecord* pBtr = nullptr;
    if (acdbOpenObject(pBtr, btrId, AcDb::kForWrite) != Acad::eOk || pBtr == nullptr)
        return;

    AcDbViewport* pVport = new AcDbViewport();
    pVport->setWidth(100.0);
    pVport->setHeight(100.0);
    pVport->setCenterPoint(AcGePoint3d(50.0, 50.0, 0.0));

    AcDbObjectId vportId;
    if (pBtr->appendAcDbEntity(vportId, pVport) == Acad::eOk)
    {
        pVport->close();
    }
    else
    {
        delete pVport;
    }

    pBtr->close();
}

[CEXT-Dan]

yes 👍