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|
#
# tkafter.rb : methods for Tcl/Tk after command
#
# $Id$
#
require 'tk'
class TkTimer
include TkCore
extend TkCore
TkCommandNames = ['after'.freeze].freeze
Tk_CBID = ['a'.freeze, '00000']
Tk_CBTBL = {}
TkCore::INTERP.add_tk_procs('rb_after', 'id', <<-'EOL')
if {[set st [catch {ruby [format "TkTimer.callback %%Q!%s!" $id]} ret]] != 0} {
return -code $st $ret
} {
return $ret
}
EOL
###############################
# class methods
###############################
def self.callback(obj_id)
@after_id = nil
ex_obj = Tk_CBTBL[obj_id]
return "" if ex_obj == nil; # canceled
#_get_eval_string(ex_obj.do_callback)
begin
ex_obj.cb_call
rescue Exception
ex_obj.cancel
""
end
end
def self.info
tk_call('after', 'info').split(' ').collect!{|id|
ret = Tk_CBTBL.find{|key,val| val.after_id == id}
(ret == nil)? id: ret[1]
}
end
###############################
# instance methods
###############################
def do_callback
@in_callback = true
begin
@return_value = @current_proc.call(self)
rescue Exception
if @cancel_on_exception
cancel
return nil
else
fail $!
end
end
if @set_next
set_next_callback(@current_args)
else
@set_next = true
end
@in_callback = false
@return_value
end
def set_callback(sleep, args=nil)
@after_script = "rb_after #{@id}"
@after_id = tk_call('after', sleep, @after_script)
@current_args = args
@current_script = [sleep, @after_script]
self
end
def set_next_callback(args)
if @running == false || @proc_max == 0 || @do_loop == 0
Tk_CBTBL.delete(@id) ;# for GC
@running = false
return
end
if @current_pos >= @proc_max
if @do_loop < 0 || (@do_loop -= 1) > 0
@current_pos = 0
else
Tk_CBTBL.delete(@id) ;# for GC
@running = false
return
end
end
@current_args = args
if @sleep_time.kind_of? Proc
sleep = @sleep_time.call(self)
else
sleep = @sleep_time
end
@current_sleep = sleep
cmd, *cmd_args = @loop_proc[@current_pos]
@current_pos += 1
@current_proc = cmd
set_callback(sleep, cmd_args)
end
def initialize(*args)
@id = Tk_CBID.join
Tk_CBID[1].succ!
# @cb_cmd = TkCore::INTERP.get_cb_entry(self.method(:do_callback))
@cb_cmd = TkCore::INTERP.get_cb_entry(proc{
begin
self.do_callback
rescue
self.cancel
end
})
@set_next = true
@init_sleep = 0
@init_proc = nil
@init_args = []
@current_script = []
@current_proc = nil
@current_args = nil
@return_value = nil
@sleep_time = 0
@current_sleep = 0
@loop_exec = 0
@do_loop = 0
@loop_proc = []
@proc_max = 0
@current_pos = 0
@after_id = nil
@after_script = nil
@cancel_on_exception = true
set_procs(*args) if args != []
@running = false
@in_callback = false
end
attr :after_id
attr :after_script
attr :current_proc
attr :current_args
attr :current_sleep
alias :current_interval :current_sleep
attr :return_value
attr_accessor :loop_exec
def cb_call
@cb_cmd.call
end
def get_procs
[@init_sleep, @init_proc, @init_args, @sleep_time, @loop_exec, @loop_proc]
end
def current_status
[@running, @current_sleep, @current_proc, @current_args,
@do_loop, @cancel_on_exception]
end
def cancel_on_exception?
@cancel_on_exception
end
def cancel_on_exception=(mode)
@cancel_on_exception = mode
end
def running?
@running
end
def loop_rest
@do_loop
end
def loop_rest=(rest)
@do_loop = rest
end
def set_procs(interval, loop_exec, *procs)
if !interval == 'idle' \
&& !interval.kind_of?(Integer) && !interval.kind_of?(Proc)
fail format("%s need to be Integer or Proc", interval.inspect)
end
@sleep_time = interval
@loop_proc = []
procs.each{|e|
if e.kind_of? Proc
@loop_proc.push([e])
else
@loop_proc.push(e)
end
}
@proc_max = @loop_proc.size
@current_pos = 0
@do_loop = 0
if loop_exec
if loop_exec.kind_of?(Integer) && loop_exec < 0
@loop_exec = -1
elsif loop_exec == nil || loop_exec == false || loop_exec == 0
@loop_exec = 1
else
if not loop_exec.kind_of?(Integer)
fail format("%s need to be Integer", loop_exec.inspect)
end
@loop_exec = loop_exec
end
@do_loop = @loop_exec
end
self
end
def add_procs(*procs)
procs.each{|e|
if e.kind_of? Proc
@loop_proc.push([e])
else
@loop_proc.push(e)
end
}
@proc_max = @loop_proc.size
self
end
def delete_procs(*procs)
procs.each{|e|
if e.kind_of? Proc
@loop_proc.delete([e])
else
@loop_proc.delete(e)
end
}
@proc_max = @loop_proc.size
cancel if @proc_max == 0
self
end
def delete_at(n)
@loop_proc.delete_at(n)
@proc_max = @loop_proc.size
cancel if @proc_max == 0
self
end
def set_start_proc(sleep, init_proc, *init_args)
if !sleep == 'idle' && !sleep.kind_of?(Integer)
fail format("%s need to be Integer", sleep.inspect)
end
@init_sleep = sleep
@init_proc = init_proc
@init_args = init_args
self
end
def start(*init_args)
return nil if @running
Tk_CBTBL[@id] = self
@do_loop = @loop_exec
@current_pos = 0
argc = init_args.size
if argc > 0
sleep = init_args.shift
if !sleep == 'idle' && !sleep.kind_of?(Integer)
fail format("%s need to be Integer", sleep.inspect)
end
@init_sleep = sleep
end
@init_proc = init_args.shift if argc > 1
@init_args = init_args if argc > 0
@current_sleep = @init_sleep
@running = true
if @init_proc
if not @init_proc.kind_of? Proc
fail format("%s need to be Proc", @init_proc.inspect)
end
@current_proc = @init_proc
set_callback(sleep, @init_args)
@set_next = false if @in_callback
else
set_next_callback(@init_args)
end
self
end
def restart(*restart_args)
cancel if @running
if restart_args == []
start(@init_sleep, @init_proc, *@init_args)
else
start(*restart_args)
end
end
def cancel
@running = false
tk_call 'after', 'cancel', @after_id if @after_id
@after_id = nil
Tk_CBTBL.delete(@id) ;# for GC
self
end
alias stop cancel
def continue(wait=nil)
fail RuntimeError, "is already running" if @running
sleep, cmd = @current_script
fail RuntimeError, "no procedure to continue" unless cmd
if wait
if not wait.kind_of? Integer
fail RuntimeError, format("%s need to be Integer", wait.inspect)
end
sleep = wait
end
Tk_CBTBL[@id] = self
@running = true
@after_id = tk_call('after', sleep, cmd)
self
end
def skip
fail RuntimeError, "is not running now" unless @running
cancel
Tk_CBTBL[@id] = self
@running = true
set_next_callback(@current_args)
self
end
def info
if @after_id
inf = tk_split_list(tk_call('after', 'info', @after_id))
[Tk_CBTBL[inf[0][1]], inf[1]]
else
nil
end
end
end
TkAfter = TkTimer
|