Some more cleanup, mainly in the Widget Demo.

library/demos/ctext.tcl

@@ -50,11 +50,7 @@ $c bind text <Return> "textInsert $c \\n"
 $c bind text <Control-h> "textBs $c"
 $c bind text <BackSpace> "textBs $c"
 $c bind text <Delete> "textDel $c"
-if {[tk windowingsystem] eq "aqua" && ![package vsatisfies [package provide tk] 8.7-]} {
-    $c bind text <Button-3> "textPaste $c @%x,%y"
-} else {
-    $c bind text <Button-2> "textPaste $c @%x,%y"
-}
+$c bind text <Button-2> "textPaste $c @%x,%y"
 
 # Next, create some items that allow the text's anchor position
 # to be edited.

library/demos/floor.tcl

@@ -1372,13 +1372,8 @@ $c bind floor2 <Button-1> "floorDisplay $c 2"
 $c bind floor3 <Button-1> "floorDisplay $c 3"
 $c bind room <Enter> "newRoom $c"
 $c bind room <Leave> {set currentRoom ""}
-if {[tk windowingsystem] eq "aqua" && ![package vsatisfies [package provide tk] 8.7-]} {
-    bind $c <Button-3> "$c scan mark %x %y"
-    bind $c <B3-Motion> "$c scan dragto %x %y"
-} else {
-    bind $c <Button-2> "$c scan mark %x %y"
-    bind $c <B2-Motion> "$c scan dragto %x %y"
-}
+bind $c <Button-2> "$c scan mark %x %y"
+bind $c <B2-Motion> "$c scan dragto %x %y"
 bind $c <Destroy> "unset currentRoom"
 set currentRoom ""
 trace add variable currentRoom write "roomChanged $c"

library/demos/items.tcl

@@ -185,17 +185,10 @@ $c create text 28.5c 17.4c -text Scale: -anchor s
 
 $c bind item <Enter> "itemEnter $c"
 $c bind item <Leave> "itemLeave $c"
-if {[tk windowingsystem] eq "aqua" && ![package vsatisfies [package provide tk] 8.7-]} {
-    bind $c <Button-2> "itemMark $c %x %y"
-    bind $c <B2-Motion> "itemStroke $c %x %y"
-    bind $c <Button-3> "$c scan mark %x %y"
-    bind $c <B3-Motion> "$c scan dragto %x %y"
-} else {
-    bind $c <Button-2> "$c scan mark %x %y"
-    bind $c <B2-Motion> "$c scan dragto %x %y"
-    bind $c <Button-3> "itemMark $c %x %y"
-    bind $c <B3-Motion> "itemStroke $c %x %y"
-}
+bind $c <Button-2> "$c scan mark %x %y"
+bind $c <B2-Motion> "$c scan dragto %x %y"
+bind $c <Button-3> "itemMark $c %x %y"
+bind $c <B3-Motion> "itemStroke $c %x %y"
 bind $c <<NextChar>> "itemsUnderArea $c"
 bind $c <Button-1> "itemStartDrag $c %x %y"
 bind $c <B1-Motion> "itemDrag $c %x %y"

library/demos/widget

@@ -10,7 +10,7 @@ exec wish "$0" ${1+"$@"}
 # separate ".tcl" files is this directory, which are sourced by this script as
 # needed.
 
-package require tk
+package require tk	8.7-
 package require msgcat
 
 destroy {*}[winfo children .]

library/tk.tcl

@@ -562,14 +562,12 @@ proc ::tk::PreciseScrollDeltas {dxdy} {
 ## yview moveto.
 
 proc ::tk::ScrollByPixels {w deltaX deltaY} {
+    set fracX [lindex [$w xview] 0]
+    set fracY [lindex [$w yview] 0]
     set width [expr {1.0 * [winfo width $w]}]
     set height [expr {1.0 * [winfo height $w]}]
-    set X [lindex [$w xview] 0]
-    set Y [lindex [$w yview] 0]
-    set x [expr {$X - $deltaX / $width}]
-    set y [expr {$Y - $deltaY / $height}]
-    $w xview moveto $x
-    $w yview moveto $y
+    $w xview moveto [expr {$fracX - $deltaX / $width}]
+    $w yview moveto [expr {$fracY - $deltaY / $height}]
 }
 
 # ::tk::TabToWindow --