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-rw-r--r--library/systray.tcl2
1 files changed, 2 insertions, 0 deletions
diff --git a/library/systray.tcl b/library/systray.tcl
index b0dc737..ada0721 100644
--- a/library/systray.tcl
+++ b/library/systray.tcl
@@ -195,6 +195,7 @@ namespace eval ::tk::sysnotify:: {
# Fade the window into view.
proc _fadeIn {w} {
variable defaults
+ if {![winfo exists $w]} {return}
if {[set alpha [option get $w alpha ""]] eq ""} {
set alpha [dict get $defaults alpha]
}
@@ -212,6 +213,7 @@ namespace eval ::tk::sysnotify:: {
# Fade out and destroy window.
proc _fadeOut {w} {
+ if {![winfo exists $w]} {return}
set before [wm attributes $w -alpha]
set new [expr { $before - 0.02 }]
wm attributes $w -alpha $new