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#
# tk/scrollbar.rb : treat scrollbar widget
#
require 'tk'
class TkScrollbar<TkWindow
TkCommandNames = ['scrollbar'.freeze].freeze
WidgetClassName = 'Scrollbar'.freeze
WidgetClassNames[WidgetClassName] = self
def create_self(keys)
@assigned = []
@scroll_proc = proc{|*args|
if self.orient == 'horizontal'
@assigned.each{|w| w.xview(*args)}
else # 'vertical'
@assigned.each{|w| w.yview(*args)}
end
}
if keys and keys != None
#tk_call_without_enc('scrollbar', @path, *hash_kv(keys, true))
tk_call_without_enc(self.class::TkCommandNames[0], @path,
*hash_kv(keys, true))
else
#tk_call_without_enc('scrollbar', @path)
tk_call_without_enc(self.class::TkCommandNames[0], @path)
end
end
private :create_self
def propagate_set(src_win, first, last)
self.set(first, last)
if self.orient == 'horizontal'
@assigned.each{|w| w.xview('moveto', first) if w != src_win}
else # 'vertical'
@assigned.each{|w| w.yview('moveto', first) if w != src_win}
end
end
def assign(*wins)
begin
self.command(@scroll_proc) if self.cget('command').cmd != @scroll_proc
rescue Exception
self.command(@scroll_proc)
end
orient = self.orient
wins.each{|w|
@assigned << w unless @assigned.index(w)
if orient == 'horizontal'
w.xscrollcommand proc{|first, last| self.propagate_set(w, first, last)}
else # 'vertical'
w.yscrollcommand proc{|first, last| self.propagate_set(w, first, last)}
end
}
Tk.update # avoid scrollbar trouble
self
end
def assigned_list
begin
return @assigned.dup if self.cget('command').cmd == @scroll_proc
rescue Exception
end
fail RuntimeError, "not depend on the assigned_list"
end
def configure(*args)
ret = super(*args)
# Tk.update # avoid scrollbar trouble
ret
end
#def delta(deltax=None, deltay=None)
def delta(deltax, deltay)
number(tk_send_without_enc('delta', deltax, deltay))
end
#def fraction(x=None, y=None)
def fraction(x, y)
number(tk_send_without_enc('fraction', x, y))
end
def identify(x, y)
tk_send_without_enc('identify', x, y)
end
def get
#ary1 = tk_send('get').split
#ary2 = []
#for i in ary1
# ary2.push number(i)
#end
#ary2
list(tk_send_without_enc('get'))
end
def set(first, last)
tk_send_without_enc('set', first, last)
self
end
def activate(element=None)
tk_send_without_enc('activate', element)
end
end
class TkXScrollbar<TkScrollbar
def create_self(keys)
keys = {} unless keys
keys['orient'] = 'horizontal'
super(keys)
end
private :create_self
end
class TkYScrollbar<TkScrollbar
def create_self(keys)
keys = {} unless keys
keys['orient'] = 'vertical'
super(keys)
end
private :create_self
end
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