using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.LayerManager;
namespace LayerFilters
{
public class Commands
{
[CommandMethod("LLFS")]
static public void ListLayerFilters()
{
Document doc =
Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
// List the nested layer filters
LayerFilterCollection lfc =
db.LayerFilters.Root.NestedFilters;
for (int i = 0; i < lfc.Count; ++i)
{
LayerFilter lf = lfc[i];
ed.WriteMessage(
" {0} - {1} (can{2} be deleted)",
i + 1,
lf.Name,
(lf.AllowDelete ? "" : "not")
);
}
}
[CommandMethod("CLFS")]
static public void CreateLayerFilters()
{
Document doc =
Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
try
{
// Get the existing layer filters
// (we will add to them and set them back)
LayerFilterTree lft =
db.LayerFilters;
LayerFilterCollection lfc =
lft.Root.NestedFilters;
// Create three new layer filters
LayerFilter lf1 = new LayerFilter();
lf1.Name = "Unlocked Layers";
lf1.FilterExpression = "LOCKED=="False"";
LayerFilter lf2 = new LayerFilter();
lf2.Name = "White Layers";
lf2.FilterExpression = "COLOR=="7"";
LayerFilter lf3 = new LayerFilter();
lf3.Name = "Visible Layers";
lf3.FilterExpression =
"OFF=="False" AND FROZEN=="False"";
// Add them to the collection
lfc.Add(lf1);
lfc.Add(lf2);
lfc.Add(lf3);
// Set them back on the Database
db.LayerFilters = lft;
// List the layer filters, to see the new ones
ListLayerFilters();
}
catch (Exception ex)
{
ed.WriteMessage(
" Exception: {0}",
ex.Message
);
}
}
[CommandMethod("DLF")]
static public void DeleteLayerFilter()
{
Document doc =
Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
ListLayerFilters();
try
{
// Get the existing layer filters
// (we will add to them and set them back)
LayerFilterTree lft =
db.LayerFilters;
LayerFilterCollection lfc =
lft.Root.NestedFilters;
// Prompt for the index of the filter to delete
PromptIntegerOptions pio =
new PromptIntegerOptions(
" Enter index of filter to delete"
);
pio.LowerLimit = 1;
pio.UpperLimit = lfc.Count;
PromptIntegerResult pir =
ed.GetInteger(pio);
// Get the selected filter
LayerFilter lf = lfc[pir.Value - 1];
// If it's possible to delete it, do so
if (!lf.AllowDelete)
{
ed.WriteMessage(
" Layer filter cannot be deleted."
);
}
else
{
lfc.Remove(lf);
db.LayerFilters = lft;
ListLayerFilters();
}
}
catch(Exception ex)
{
ed.WriteMessage(
" Exception: {0}",
ex.Message
);
}
}
}
}