canvas: Why bind <Leave> throws error but <Button-1> not

[Horst Stanitzok]

What I get an error with <Leave> but not with <1> ?

Error:
"bad option "find": must be cget or configure"


The code:

pack [canvas .c]
.c create line 50 0 50 [.c cget -height] -tags aha -width 1 -fill red

bind . <Leave> {hair_delete %W %x} ;# error
#bind . <Button-1> {hair_delete %W %x} ;# OK

proc hair_delete {w x} {
if {[llength [$w find withtag aha]]} {
$w delete aha
}
}

[Horst Stanitzok]

Sorry my mistake:

correct is:

bind .c <Leave>

not

bind . <Leave>



Horst

[Arjen Markus]

I think you want to bind to .c instead of .

The error probably comes from the rules by which events are propagated
- <Leave> has a meaning for a toplevel widget, but <Button-1> does not.

Regards,

Arjen

Op donderdag 24 januari 2013 13:41:40 UTC+1 schreef Horst Stanitzok het volgende:

[Uwe Klein]

debug by way of printing $w
proc hair_delete {w x} {
puts "win:$w"

> if {[llength [$w find withtag aha]]} {
> $w delete aha
> }
> }

my guess is you leave the toplevel.

anyway you explicitly bind to . and not .c"
the toplevel does not know about canvas subcomands.

uwe