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#
# tktextframe.rb : a sample of TkComposite
#
# by Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
#
require 'tk'
class TkTextFrame < TkText
include TkComposite
def initialize_composite(keys={})
keys = _symbolkey2str(keys)
# create scrollbars
@v_scroll = TkScrollbar.new(@frame, 'orient'=>'vertical')
@h_scroll = TkScrollbar.new(@frame, 'orient'=>'horizontal')
# create a text widget
@text = TkText.new(@frame, 'wrap'=>'none')
# set default receiver of method calls
@path = @text.path
# assign scrollbars
@text.xscrollbar(@h_scroll)
@text.yscrollbar(@v_scroll)
# allignment
TkGrid.rowconfigure(@frame, 0, 'weight'=>1, 'minsize'=>0)
TkGrid.columnconfigure(@frame, 0, 'weight'=>1, 'minsize'=>0)
@text.grid('row'=>0, 'column'=>0, 'sticky'=>'news')
# scrollbars ON
vscroll(keys.delete('vscroll'){true})
hscroll(keys.delete('hscroll'){true})
# set background of the text widget
color = keys.delete('textbackground')
textbackground(color) if color
# set receiver widgets for configure methods
delegate('DEFAULT', @text)
delegate('background', @frame, @h_scroll, @v_scroll)
delegate('activebackground', @h_scroll, @v_scroll)
delegate('troughcolor', @h_scroll, @v_scroll)
delegate('repeatdelay', @h_scroll, @v_scroll)
delegate('repeatinterval', @h_scroll, @v_scroll)
delegate('borderwidth', @frame)
delegate('relief', @frame)
# do configure
configure keys unless keys.empty?
end
private :initialize_composite
# set background color of text widget
def textbackground(color = nil)
if color
@text.background(color)
else
@text.background
end
end
# vertical scrollbar : ON/OFF
def vscroll(mode)
st = TkGrid.info(@v_scroll)
if mode && st == [] then
@v_scroll.grid('row'=>0, 'column'=>1, 'sticky'=>'ns')
elsif !mode && st != [] then
@v_scroll.ungrid
end
self
end
# horizontal scrollbar : ON/OFF
def hscroll(mode, wrap_mode="char")
st = TkGrid.info(@h_scroll)
if mode && st == [] then
@h_scroll.grid('row'=>1, 'column'=>0, 'sticky'=>'ew')
wrap 'none' # => self.wrap('none')
elsif !mode && st != [] then
@h_scroll.ungrid
wrap wrap_mode # => self.wrap(wrap_mode)
end
self
end
end
################################################
# test
################################################
if __FILE__ == $0
f = TkFrame.new.pack('fill'=>'x')
t = TkTextFrame.new.pack
TkButton.new(f, 'text'=>'vscr OFF',
'command'=>proc{t.vscroll(false)}).pack('side'=>'right')
TkButton.new(f, 'text'=>'vscr ON',
'command'=>proc{t.vscroll(true)}).pack('side'=>'right')
TkButton.new(f, 'text'=>'hscr ON',
'command'=>proc{t.hscroll(true)}).pack('side'=>'left')
TkButton.new(f, 'text'=>'hscr OFF',
'command'=>proc{t.hscroll(false)}).pack('side'=>'left')
Tk.mainloop
end
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