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package require Tclpd 0.2.3
package require TclpdLib 0.19
proc exists::constructor {self args} {
if {![namespace exists $self]} {
namespace eval $self {}
}
variable ${self}::current_canvas [canvas_getcurrent]
# set to blank so the var always exists
variable ${self}::filename {}
# add second inlet (first created by default)
pd::add_inlet $self list
# add outlet
pd::add_outlet $self list
}
proc exists::0_symbol {self args} {
# HOT inlet
variable ${self}::filename [pd::arg 0 symbol]
exists::0_bang $self
}
proc exists::0_bang {self} {
variable ${self}::current_canvas
variable ${self}::filename
if {[file pathtype $filename] eq "absolute"} {
pd::outlet $self 0 float [file exists $filename]
} else {
set dir [[canvas_getdir $current_canvas] cget -s_name]
pd::outlet $self 0 float [file exists [file join $dir $filename]]
}
}
proc exists::1_symbol {self args} {
# COLD inlet
variable ${self}::filename [pd::arg 0 symbol]
}
pd::class exists
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