The demos path is managed locally by the demosPath proc

1 files changed, 16 insertions, 3 deletions

diff --git a/demos/zinc-widget b/demos/zinc-widget
index 1ff1f05..9132771 100644
--- a/demos/zinc-widget
+++ b/demos/zinc-widget
@@ -201,6 +201,21 @@ proc showVars {w args} {
     pack $w.ok -side bottom -pady 2
 }
 
+#
+# demosPath --
+# Return the path to the installed demo directory.
+
+proc demosPath {} {
+    global zinc_library tcl_platform
+
+    if { [lindex $tcl_platform(os) 0] eq "Windows" &&
+	! [file exists [file join $zinc_library pkgIndex.tcl]] } {
+	return [file join $zinc_library demos Tkzinc]
+    } {
+	return [file join $zinc_library demos]
+    }
+}
+
 # invoke --
 # This procedure is called when the user clicks on a demo description.
 # It is responsible for invoking the demonstration.
@@ -209,8 +224,6 @@ proc showVars {w args} {
 # index -	The index of the character that the user clicked on.
 
 proc invoke index {
-    global zinc_library
-
     set tags [.t tag names $index]
     set i [lsearch -glob $tags demo-*]
     if {$i < 0} {
@@ -220,7 +233,7 @@ proc invoke index {
     .t configure -cursor watch
     update
     set demo [string range [lindex $tags $i] 5 end]
-    uplevel [list source [file join $zinc_library demos $demo.tcl]]
+    uplevel [list source [file join [demosPath] $demo.tcl]]
     update
     .t configure -cursor $cursor