vb.net select ALL
You can use Editor.SelectAll() with or without filter to select all or targeting entities for your transformation process. You can surely achieve the effect as you described as what user see how AutoCAD does it. For example shown in following pseudo-code:
public void MoveAllEntity()
{
Document dwg=Application.DocumentManager.MdiActiveDocument;
Editor ed=dwg.Editor;
PromptSelectionResult res=ed,SelectAll();
if (res.Status==PromptStatus.OK)
{
ObjectId[] selectedIds=res.Value.GetObjectIds();
//Here you may want to highlight all the selected entities
//so the code running is more like native AutoCAD command
//Ask user to pick based point,
//you may allow user to hit Enter for a default base point
Point3d basePt=SelectBasePoint(ed);
//Ask user for point to move to
//or a distance and direction (angle)
Point3d movetOPt=SelectDestination(ed);
Matrix3d mt=DiefineMyTransformMatris(basePt, moveToPt) //define an Matrix3d for move
//Do the move
using (Transaction tran=....)
{
foreach (ObjectId id in selectedIds)
{
//Open the entity and then
ent.TransformedBy(mt);
//Unhighlight the entity if you highlighted previously
}
tran.commit()
}
}
}
As you can see, the only user interrection needed is to pick 2 points.With Editor.SelectAll(), there is no need for user interaction to select entities.
If you want to do the transformation in side database, then you cannot use Editor.SelectAll(), because there is not Editor for side database.
Yes, if you only target entities in ModelSpace (or given layout in paperspace), you just get the space BlockTableRecord and then loop through all entities in that space.