Use non-busy wait in stead of busy "after 100". Testcase still passes! Great!

1 files changed, 17 insertions, 6 deletions

diff --git a/library/button.tcl b/library/button.tcl
index 16624e7..80d8bf9 100644
--- a/library/button.tcl
+++ b/library/button.tcl
@@ -601,12 +601,23 @@ proc ::tk::ButtonInvoke w {
 	set oldRelief [$w cget -relief]
 	set oldState [$w cget -state]
 	$w configure -state active -relief sunken
-	update idletasks
-	after 100
-        if {[winfo exists $w]} {
-            $w configure -state $oldState -relief $oldRelief
-            uplevel #0 [list $w invoke]
-        }
+	after 100 [list ::tk::ButtonInvokeEnd $w $oldState $oldRelief]
+    }
+}
+
+# ::tk::ButtonInvokeEnd --
+# The procedure below is called after a button is invoked through
+# the keyboard.  It simulate a release of the button via the mouse.
+#
+# Arguments:
+# w -         The name of the widget.
+# oldState -  Old state to be set back.
+# oldRelief - Old relief to be set back.
+
+proc ::tk::ButtonInvokeEnd {w oldState oldRelief} {
+    if {[winfo exists $w]} {
+	$w configure -state $oldState -relief $oldRelief
+	uplevel #0 [list $w invoke]
     }
 }