3 files changed, 24 insertions, 2 deletions
diff --git a/src/Gtk/Widgets/Sheet.dcl b/src/Gtk/Widgets/Sheet.dcl
index 2541242..0f365d2 100644
--- a/src/Gtk/Widgets/Sheet.dcl
+++ b/src/Gtk/Widgets/Sheet.dcl
@@ -4,6 +4,8 @@ definition module Gtk.Widgets.Sheet
  * This module provides support for GtkSheet; a spreadsheet widget. See
  * https://fpaquet.github.io/gtksheet/ for more details and installation
  * instructions. Use the 'Gtk with GtkSheet' environment.
+ *
+ * Note that the C library is slightly buggy.
  */
 
 from StdMaybe import :: Maybe
@@ -26,8 +28,19 @@ instance gtkWidget GtkSheet
 instance gtkContainer GtkSheet
 
 newSheet :: !Int !Int !String -> GtkM GtkSheet
+
+/**
+ * Freezing a sheet means that the GUI will not be updated; all model updates
+ * are collected and the GUI is updated in a single step when the sheet is
+ * unfrozen. This is a wrapper function which freezes the sheet, executes the
+ * monad, and then unfreezes the sheet again.
+ */
 whileFrozen :: !(GtkM a) !GtkSheet -> GtkM a
 
+/**
+ * Make sure the sheet has the given width and height by adding or deleting
+ * rows and columns.
+ */
 ensureDimensions :: !Int !Int !GtkSheet -> GtkM GtkSheet
 
 setColumnTitle :: !Int !String !GtkSheet -> GtkM GtkSheet
diff --git a/src/Gtk/Widgets/Sheet/Signal.dcl b/src/Gtk/Widgets/Sheet/Signal.dcl
index 5708651..9084b4d 100644
--- a/src/Gtk/Widgets/Sheet/Signal.dcl
+++ b/src/Gtk/Widgets/Sheet/Signal.dcl
@@ -4,11 +4,16 @@ from StdMaybe import :: Maybe
 
 from Gtk.Signal import class signalHandler, :: SignalHandlerInternal
 from Gtk.State import :: GtkM
+from Gtk.Tune import class tune
+from Gtk.Types import :: GtkPropagate
+from Gtk.Widgets import class gtkWidget
 
 :: GtkSheetSignalHandler
 	= DeactivateHandler !(Int Int -> GtkM Bool)
-	| EnterPressedHandler !(GtkM Bool)
+	| EnterPressedHandler !(GtkM GtkPropagate)
 	| SheetActivateHandler !(Int Int -> GtkM ())
 	| TraverseHandler !((Maybe (Int,Int)) (Int,Int) -> GtkM (Maybe (Int, Int)))
 
 instance signalHandler GtkSheetSignalHandler
+
+instance tune w GtkSheetSignalHandler | gtkWidget w
diff --git a/src/Gtk/Widgets/Sheet/Signal.icl b/src/Gtk/Widgets/Sheet/Signal.icl
index 6de4209..d08f4dd 100644
--- a/src/Gtk/Widgets/Sheet/Signal.icl
+++ b/src/Gtk/Widgets/Sheet/Signal.icl
@@ -18,7 +18,7 @@ where
 		TraverseHandler _      -> "traverse"
 	signalHandler handler = case handler of
 		DeactivateHandler f -> SHI_Int_Int_Bool f
-		EnterPressedHandler f -> SHI_Pointer_Bool \_ -> not <$> f
+		EnterPressedHandler f -> SHI_Pointer_Bool \_ -> (\p -> p=:StopPropagation) <$> f
 		SheetActivateHandler f -> SHI_Int_Int_Bool \r c -> f r c >>| pure True
 		TraverseHandler f -> SHI_Int_Int_Pointer_Pointer_Bool \oldrow oldcol newrowp newcolp ->
 			let newrow = readInt4S newrowp 0; newcol = readInt4S newcolp 0 in
@@ -35,3 +35,7 @@ where
 						appWorld (forceEval (writeInt4 newrowp 0 row)) >>|
 						appWorld (forceEval (writeInt4 newcolp 0 col)) >>|
 						pure True)
+
+instance tune w GtkSheetSignalHandler | gtkWidget w
+where
+	tune handler widget = installSignalHandler handler widget