1 files changed, 26 insertions, 32 deletions
diff --git a/library/scrlbar.tcl b/library/scrlbar.tcl
index 6f1caa2..65f29ee 100644
--- a/library/scrlbar.tcl
+++ b/library/scrlbar.tcl
@@ -128,42 +128,36 @@ bind Scrollbar <<LineEnd>> {
     tk::ScrollToPos %W 1
 }
 }
-switch [tk windowingsystem] {
-    "aqua" {
-	bind Scrollbar <MouseWheel> {
-	    tk::ScrollByUnits %W v [expr {- (%D)}]
-	}
-	bind Scrollbar <Option-MouseWheel> {
-	    tk::ScrollByUnits %W v [expr {-10 * (%D)}]
-	}
-	bind Scrollbar <Shift-MouseWheel> {
-	    tk::ScrollByUnits %W h [expr {- (%D)}]
-	}
-	bind Scrollbar <Shift-Option-MouseWheel> {
-	    tk::ScrollByUnits %W h [expr {-10 * (%D)}]
-	}
+
+if {[tk windowingsystem] eq "aqua"} {
+    bind Scrollbar <MouseWheel> {
+	tk::ScrollByUnits %W v [expr {-(%D)}]
     }
-    "win32" {
-	bind Scrollbar <MouseWheel> {
-	    tk::ScrollByUnits %W v [expr {- (%D / 120) * 4}]
-	}
-	bind Scrollbar <Shift-MouseWheel> {
-	    tk::ScrollByUnits %W h [expr {- (%D / 120) * 4}]
-	}
+    bind Scrollbar <Option-MouseWheel> {
+	tk::ScrollByUnits %W v [expr {-10 * (%D)}]
     }
-    "x11" {
-	bind Scrollbar <MouseWheel> {
-	    tk::ScrollByUnits %W v [expr {- (%D /120 ) * 4}]
-	}
-	bind Scrollbar <Shift-MouseWheel> {
-	    tk::ScrollByUnits %W h [expr {- (%D /120 ) * 4}]
-	}
-	bind Scrollbar <4> {tk::ScrollByUnits %W v -5}
-	bind Scrollbar <5> {tk::ScrollByUnits %W v 5}
-	bind Scrollbar <Shift-4> {tk::ScrollByUnits %W h -5}
-	bind Scrollbar <Shift-5> {tk::ScrollByUnits %W h 5}
+    bind Scrollbar <Shift-MouseWheel> {
+	tk::ScrollByUnits %W h [expr {-(%D)}]
+    }
+    bind Scrollbar <Shift-Option-MouseWheel> {
+	tk::ScrollByUnits %W h [expr {-10 * (%D)}]
+    }
+} else {
+    bind Scrollbar <MouseWheel> {
+	tk::ScrollByUnits %W v [expr {-(%D / 30)}]
+    }
+    bind Scrollbar <Shift-MouseWheel> {
+	tk::ScrollByUnits %W h [expr {-(%D / 30)}]
     }
 }
+
+if {[tk windowingsystem] eq "x11"} {
+    bind Scrollbar <4> {tk::ScrollByUnits %W v -5}
+    bind Scrollbar <5> {tk::ScrollByUnits %W v 5}
+    bind Scrollbar <Shift-4> {tk::ScrollByUnits %W h -5}
+    bind Scrollbar <Shift-5> {tk::ScrollByUnits %W h 5}
+}
+
 # tk::ScrollButtonDown --
 # This procedure is invoked when a button is pressed in a scrollbar.
 # It changes the way the scrollbar is displayed and takes actions