From 2c0faa8ec285da5f121e78f155700fd1d6f53ecc Mon Sep 17 00:00:00 2001
From: drh <drh@sqlite.org>
Date: Wed, 12 Sep 2001 19:13:56 +0000
Subject: Fix a problem in the Unix tk_getOpenFile dialog box.  An error dialog
 box used to appear when you would point the file browser box at an empty
 directory and click on the canvas.

---
 library/tkfbox.tcl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/library/tkfbox.tcl b/library/tkfbox.tcl
index 4e2ed56..be10d49 100644
--- a/library/tkfbox.tcl
+++ b/library/tkfbox.tcl
@@ -11,7 +11,7 @@
 #	files by clicking on the file icons or by entering a filename
 #	in the "Filename:" entry.
 #
-# RCS: @(#) $Id: tkfbox.tcl,v 1.29 2001/08/09 00:47:09 dgp Exp $
+# RCS: @(#) $Id: tkfbox.tcl,v 1.30 2001/09/12 19:13:56 drh Exp $
 #
 # Copyright (c) 1994-1998 Sun Microsystems, Inc.
 #
@@ -533,6 +533,7 @@ proc ::tk::IconList_Btn1 {w x y} {
     set x [expr {int([$data(canvas) canvasx $x])}]
     set y [expr {int([$data(canvas) canvasy $y])}]
     set i [IconList_Index $w @${x},${y}]
+    if {$i==""} return
     IconList_Selection $w clear 0 end
     IconList_Selection $w set $i
     IconList_Selection $w anchor $i
@@ -546,6 +547,7 @@ proc ::tk::IconList_CtrlBtn1 {w x y} {
 	set x [expr {int([$data(canvas) canvasx $x])}]
 	set y [expr {int([$data(canvas) canvasy $y])}]
 	set i [IconList_Index $w @${x},${y}]
+	if {$i==""} return
 	if { [IconList_Selection $w includes $i] } {
 	    IconList_Selection $w clear $i
 	} else {
@@ -563,6 +565,7 @@ proc ::tk::IconList_ShiftBtn1 {w x y} {
 	set x [expr {int([$data(canvas) canvasx $x])}]
 	set y [expr {int([$data(canvas) canvasy $y])}]
 	set i [IconList_Index $w @${x},${y}]
+	if {$i==""} return
 	set a [IconList_Index $w anchor]
 	if { [string equal $a ""] } {
 	    set a $i
@@ -582,6 +585,7 @@ proc ::tk::IconList_Motion1 {w x y} {
     set x [expr {int([$data(canvas) canvasx $x])}]
     set y [expr {int([$data(canvas) canvasy $y])}]
     set i [IconList_Index $w @${x},${y}]
+    if {$i==""} return
     IconList_Selection $w clear 0 end
     IconList_Selection $w set $i
 }
@@ -642,6 +646,7 @@ proc ::tk::IconList_UpDown {w amount} {
 	set i 0
     } else {
 	set i [tk::IconList_Index $w anchor]
+	if {$i==""} return
 	incr i $amount
     }
     IconList_Selection $w clear 0 end
@@ -670,6 +675,7 @@ proc ::tk::IconList_LeftRight {w amount} {
 	set i 0
     } else {
 	set i [IconList_Index $w anchor]
+	if {$i==""} return
 	incr i [expr {$amount*$data(itemsPerColumn)}]
     }
     IconList_Selection $w clear 0 end
-- 
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