Added support for the MouseWheel event.

FossilOrigin-Name: 36ac110bcfabe39cd0f8f0af96e59dd73d52646e

1 files changed, 10 insertions, 1 deletions

diff --git a/library/text.tcl b/library/text.tcl
index b0bc2e5..6ef185c 100644
--- a/library/text.tcl
+++ b/library/text.tcl
@@ -3,10 +3,11 @@
 # This file defines the default bindings for Tk text widgets and provides
 # procedures that help in implementing the bindings.
 #
-# RCS: @(#) $Id: text.tcl,v 1.4 1998/09/14 18:23:25 stanton Exp $
+# RCS: @(#) $Id: text.tcl,v 1.5 1998/10/10 00:30:36 rjohnson Exp $
 #
 # Copyright (c) 1992-1994 The Regents of the University of California.
 # Copyright (c) 1994-1997 Sun Microsystems, Inc.
+# Copyright (c) 1998 by Scriptics Corporation.
 #
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -447,6 +448,14 @@ bind Text <B2-Motion> {
 }
 set tkPriv(prevPos) {}
 
+# The MouseWheel will typically only fire on Windows.  However,
+# someone could use the "event generate" command to produce one
+# on other platforms.
+
+bind Text <MouseWheel> {
+    %W yview scroll [expr - (%D / 120) * 4] units
+}
+
 # tkTextClosestGap --
 # Given x and y coordinates, this procedure finds the closest boundary
 # between characters to the given coordinates and returns the index