Deprecate gt in favor of lt

DESCRIPTION

@@ -43,7 +43,7 @@ Imports:
     data.table,
     dplyr,
     gsDesign,
-    gt,
+    lt,
     methods,
     mvtnorm,
     npsurvSS (>= 1.1.0),
@@ -58,6 +58,7 @@ Suggests:
     covr,
     ggplot2,
     cowplot,
+    gt,
     kableExtra,
     knitr,
     rmarkdown,

NAMESPACE

@@ -5,6 +5,8 @@ S3method(as_gt,gs_design_summary)
 S3method(as_gt,simtrial_gs_wlr)
 S3method(as_rtf,fixed_design_summary)
 S3method(as_rtf,gs_design_summary)
+S3method(lt::lt,fixed_design_summary)
+S3method(lt::lt,gs_design_summary)
 S3method(print,fixed_design)
 S3method(print,gs_design)
 S3method(summary,fixed_design)
@@ -50,6 +52,7 @@ export(gs_power_wlr)
 export(gs_spending_bound)
 export(gs_spending_combo)
 export(gs_update_ahr)
+export(lt)
 export(ppwe)
 export(pw_info)
 export(s2pwe)
@@ -95,6 +98,7 @@ importFrom(gsDesign,
   gsDesign,
   sfLDOF
 )
+importFrom(lt,lt)
 importFrom(stats,
   pnorm,
   qnorm,

NEWS.md

@@ -1,15 +1,18 @@
 # gsDesign2 1.2.0
 
+## Major changes
+
+- The (heavy) **gt** dependency has been replaced with the lightweight **lt** package, and `lt()` methods are now the recommended way to render design summaries as tables. S3 methods for `lt()` are provided for `fixed_design_summary` and `gs_design_summary` objects, and the `lt()` generic is re-exported so it can be used after loading only gsDesign2. There are no significant visual changes in the HTML tables. `as_gt()` is deprecated but kept for one release: it still returns a `gt_tbl` object (so existing code that customizes the output with **gt** functions keeps working) and now requires the suggested **gt** package to be installed.
+
 ## New features
 
 - Harm boundaries are now supported in `gs_design_ahr()`, `gs_power_ahr()`, `gs_design_npe()`, and `gs_power_npe()` through the new `harm`, `hpar`, and `test_harm` arguments. Harm boundaries are available for group sequential designs with futility testing and are not supported for fixed designs (#640, thanks to @LittleBeannie, @yihui, and @keaven).
-- Harm boundaries are now included in `summary()`, `gs_bound_summary()`, `as_gt()`, and `as_rtf()` output, with controls for custom labels and bound display (#640, thanks to @LittleBeannie, @jdblischak, @yihui, and @keaven).
+- Harm boundaries are now included in `summary()`, `gs_bound_summary()`, `lt()` (and the deprecated `as_gt()`), and `as_rtf()` output, with controls for custom labels and bound display (#640, thanks to @LittleBeannie, @jdblischak, @yihui, and @keaven).
 
 ## Documentation
 
 - A new vignette demonstrates how `gs_design_ahr()` reproduces `gsDesign::gsSurv(method = "Schoenfeld")` boundaries across test types, including designs with harm boundaries (#640, thanks to @LittleBeannie, @yihui, and @keaven).
 
-
 # gsDesign2 1.1.9
 
 ## New features