LayoutNum

Provides a DCL dialog to batch rename layouts using sequential numbering with optional prefix, suffix, and zero-padding, with filtering and preview.
Supports in-dialog Apply and multi-level Undo without calling AutoCAD UNDO from DCL callbacks, to avoid stability issues.

Builds a unique DCL dialog definition at runtime and lists layouts with a wildcard filter, optionally including Model in the list as a non-renamable entry.
Allows selecting multiple layouts, choosing ordering by tab order or alphabetical, and defining rename parameters: starting number, width (zero-padding), prefix, suffix, and optional auto-resolve for name conflicts.
Displays a preview list showing Old => New names before applying changes; preview refreshes when selection or options change.
Applies renaming using ActiveX by setting each layout object name, wrapped in a safe undo mark for editor-level undo grouping, while also recording rename frames for the dialog’s own manual undo stack.
Implements Undo inside the dialog by replaying stored rename frames in reverse to restore old names, avoiding the AutoCAD UNDO command inside DCL callbacks.
Persists the last-used UI values (filter, numbering, prefix/suffix, order, auto-resolve, include model) so the next run starts with the prior settings.

LayoutNum:WriteDCL builds a unique dialog name and writes the full DCL string to a temporary file, returning the file path and dialog name.
LayoutNum:LayoutsTabOrder collects layout objects with their tab order and returns a sorted list used for display and renaming sequence.
LayoutNum:RebuildDisplay applies the filter and ordering, rebuilds the layout list, preserves selection, and refreshes the preview.
LayoutNum:GetSelectedItems maps list box indices to the underlying layout entries for consistent selection handling.
LayoutNum:ComputeRenamePlan generates the proposed new names based on start, pad, prefix, suffix, order, and conflict policy, marking Model as non-renamable.
LayoutNum:ValidateBeforeRename validates selection and numeric inputs and checks name uniqueness and conflicts when auto-resolve is disabled.
LayoutNum:ApplyRename performs renames, records a frame of (object old new) for manual undo, refreshes lists, and updates defaults for convenience.
LayoutNum:DoUndo restores the last rename frame in reverse order to avoid collisions and keeps selection on restored names after refresh.
_StartUndo and _EndUndo manage VLA undo marks safely without invoking the UNDO command inside DCL callbacks.
LayoutNum:Cleanup unloads the dialog and deletes the temporary DCL file to prevent leftovers across runs.
c:LAYOUTNUM, c:_LAYOUTNUM, c:LayoutNum are safe command entry points calling LayoutNum:Run.

Wildcard filter with a dedicated Apply Filter action that rebuilds the displayed list without renaming anything.
Multi-select layouts with Select All and Select None shortcuts and a live status indicator showing shown and selected counts.
Preview panel showing proposed renames as Old => New, with a Refresh Preview button and auto-refresh on option changes.
Renaming options including starting number, zero-padding width, prefix, suffix, order mode (tab order or alphabetical), and auto-resolve for conflicts by appending -1, -2, and so on.
Non-destructive handling of Model when included: it can be listed but is blocked from renaming and triggers validation alerts if selected for rename.
Bottom controls: Apply renames and keeps dialog open, Undo restores prior rename sets, OK renames and closes, Cancel closes without applying a new rename.
Safety rule avoids calling AutoCAD UNDO from DCL callbacks and instead uses a manual undo stack, while still grouping changes with VLA undo marks.
Persists last-used settings across runs for faster repeat usage.

On Apply, selected layouts are renamed immediately according to the preview plan, the dialog stays open, and Undo becomes available for rollback of the last rename operation.
On Undo, the most recent rename frame is reverted and the selection is restored to the reverted layout names; supports multi-level undo until the stack is empty.
On OK, performs the rename then closes the dialog, persisting the current UI settings for the next run.
On Cancel or close, no new rename is applied by this action and the dialog exits after capturing settings and cleaning up the temporary DCL file.
If validation fails, shows an alert explaining the issue and prevents renaming until corrected.
If no paper-space layouts exist, prints a message and exits without opening the dialog.

Based on / Source code: Open Website

Page Tag: Rename