FreezeLayersInVP

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Short description

Shows a DCL dialog to filter and multi-select layers, then freezes the selected layers in the current viewport using VPLAYER.
Supports filtering by Current layers, Xref layers, or Current_and_Xref, with an optional Xref picker and a fixed-width “faux columns” layer list.

Command:

Commands: FreezeLayersInVP and alias FLVP

Description:

Builds an embedded DCL file at runtime and displays a dialog titled Freeze Layers in Current Viewport.
Collects all layers from the active document and optionally restricts matches to Current layers, Xref layers, or both, with an additional Xref-name selector when Xref filtering is enabled.
Uses an accent-insensitive filter: if the filter text contains no wildcards, it is treated as a contains search by wrapping it with * on both sides; if it contains * or ?, it is treated as a wildcard pattern.
Displays matching layers in a fixed-width list with a sticky header and “faux columns” that show key layer properties (On/Freeze/Lock/Plot/Color/Linetype/Description).
On Freeze, runs VPLAYER to freeze each selected layer for the active viewport context.

Helper function: (if any)

str-join joins a list of strings using a separator for persistence messages and environment storage.
split splits a string by a delimiter and drops empty parts (used for env parsing and index parsing).
parse-indexes safely converts list-box selection strings like “0 2 5” into index lists.
deaccent normalizes text by translating common accented Latin characters to ASCII and uppercasing for accent-insensitive matching.
has-wildcards detects whether the filter contains * or ? to decide between wildcard and contains filtering.
make-spaces and fmt-pad create fixed-width padding for faux column formatting.
bool->yn converts boolean flags into Yes or No for the display row.
aci->name converts common ACI color indices into readable color names for the display row.
get-layer-props queries the layer object via ActiveX to retrieve On/Freeze/Lock/Plot/Color/Linetype/Description and determines whether it is an Xref layer by the presence of | in the name.
fmt-row builds one fixed-width display line with faux columns: Src, Name, On, Frz, Lck, Plt, Color, LT, Desc.
get-all-xrefs collects attached, resolved Xrefs by scanning block references in ModelSpace and PaperSpace and checking Xref properties and paths.
layer-xref-name extracts the Xref name prefix from an Xref layer name of form XREFNAME|LAYER.
get-all-layers gathers all layer names from the document’s Layers collection and sorts them.
filter-layers applies the accent-insensitive pattern match plus Current/Xref scope rules and optional Xref-name restriction to produce filteredLayers.
fill-layers-list fills the list box with formatted rows and maintains a row-to-layer-name mapping for index resolution.
update-ui refreshes the Xref list, applies remembered Xref preselection, enables or disables the Xref picker, and repopulates the matching layer list.
c:FreezeLayersInVP is the main command routine; c:FLVP calls it as an alias.

Functionalities:

• Runtime DCL generation writes the dialog to a temp file each run, loads it, then deletes it after closing.
• Sticky header shows the faux-column titles in a fixed-width text control above the layer list.
• Faux columns display: Src, Name, On, Frz, Lck, Plt, Color, LT, Desc using fixed-width padding.
• Accent-insensitive filtering normalizes both filter text and layer names before matching, improving usability with localized naming.
• Scope toggles to include Current_Layers, Current_and_Xref_Layers, and Xref_Layers when filtering the layer list.
• Xref picker becomes enabled only when Xref_Layers is on and can restrict results to layers belonging to selected Xrefs.
• Persistent settings remembers last filter text, toggle states, and chosen Xrefs using environment variables for the next session.
• Multi-select layer freeze freezes each selected layer using VPLAYER with the freeze option and the _A scope as implemented in the routine.
• Note the routine freezes with VPLAYER _A as coded, and the comment indicates _C could be used to target only the current viewport if desired.

Result:

If the user clicks Freeze, each selected layer is frozen via VPLAYER and a summary line prints listing frozen layer names.
If no layers are selected, prints No layers selected.
If the dialog cannot be loaded, shows an alert and exits without changes.
After the dialog closes, restores CMDECHO, unloads the dialog, and deletes the generated DCL file.