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#
# tkalignbox.rb : align widgets with same width/height
#
# by Hidetoshi NAGAI
#
# The box size depends on 'reqheight' and 'reqwidth' of contained widgets.
# If you want to give the box size when those requested sizes are 0,
# please set box.propagate = false (See the test routine at the tail of
# this file).
require 'tk'
class TkAlignBox < TkFrame
def initialize(*args)
super(*args)
@max_width = 0
@max_height = 0
@propagate = true
@widgets = []
end
def _set_framesize
fail RuntimeError, "TkAlignBox is an abstract class"
end
private :_set_framesize
def _place_config(widget, idx, cnt)
fail RuntimeError, "TkAlignBox is an abstract class"
end
private :_place_config
def align
widgets = []
@widgets.each{|w| widgets << w if w.winfo_exist?}
@widgets = widgets
cnt = @widgets.size.to_f
@widgets.each_with_index{|w, idx| _place_config(w, idx, cnt)}
@widgets = widgets
_set_framesize if @propagate
self
end
def add(*widgets)
widgets.each{|w|
unless w.kind_of? TkWindow
fail RuntimeError, "#{w.inspect} is not a widget instance."
end
@widgets.delete(w)
@widgets << w
sz = w.winfo_reqwidth
@max_width = sz if @max_width < sz
sz = w.winfo_reqheight
@max_height = sz if @max_height < sz
}
align
self
end
def <<(widget)
add(widget)
end
def insert(idx, widget)
unless widget.kind_of? TkWindow
fail RuntimeError, "#{widget.inspect} is not a widget instance."
end
@widgets.delete(widget)
@widgets[idx,0] = widget
sz = widget.winfo_reqwidth
@max_width = sz if @max_width < sz
sz = widget.winfo_reqheight
@max_height = sz if @max_height < sz
align
self
end
def delete(idx)
ret = @widgets.delete_at(idx)
@req_size = 0
@widget.each{|w|
sz = w.winfo_reqwidth
@max_width = sz if @max_width < sz
sz = w.winfo_reqheight
@max_height = sz if @max_height < sz
}
align
ret
end
attr_accessor :propagate
end
class TkHBox < TkAlignBox
def _set_framesize
bd = self.borderwidth
self.width(@max_width * @widgets.size + 2 * bd)
self.height(@max_height + 2 * bd)
end
def _place_config(widget, idx, cnt)
widget.place_in(self, 'relx'=>idx/cnt, 'relwidth'=>1.0/cnt,
'relheight'=>1.0)
end
end
TkHLBox = TkHBox
class TkHRBox < TkHBox
def _place_config(widget, idx, cnt)
widget.place_in(self, 'relx'=>(cnt - idx - 1)/cnt, 'relwidth'=>1.0/cnt,
'relheight'=>1.0)
end
end
class TkVBox < TkAlignBox
def _set_framesize
self.width(@max_width + 2 * bd)
self.height(@max_height * @widgets.size + 2 * bd)
end
def _place_config(widget, idx, cnt)
widget.place_in(self, 'rely'=>idx/cnt, 'relheight'=>1.0/cnt,
'relwidth'=>1.0)
end
end
TkVTBox = TkVBox
class TkVBBox < TkVBox
def _place_config(widget, idx, cnt)
widget.place_in(self, 'rely'=>(cnt - idx - 1)/cnt, 'relheight'=>1.0/cnt,
'relwidth'=>1.0)
end
end
################################################
# test
################################################
if __FILE__ == $0
f = TkHBox.new(:borderwidth=>3, :relief=>'ridge').pack
f.add(TkButton.new(f, :text=>'a'),
TkButton.new(f, :text=>'aa', :font=>'Helvetica 16'),
TkButton.new(f, :text=>'aaa'),
TkButton.new(f, :text=>'aaaa'))
f = TkVBox.new(:borderwidth=>5, :relief=>'groove').pack
f.add(TkButton.new(f, :text=>'a'),
TkButton.new(f, :text=>'aa', :font=>'Helvetica 30'),
TkButton.new(f, :text=>'aaa'),
TkButton.new(f, :text=>'aaaa'))
f = TkHRBox.new(:borderwidth=>3, :relief=>'raised').pack(:fill=>:x)
f.add(TkButton.new(f, :text=>'a'),
TkButton.new(f, :text=>'aa'),
TkButton.new(f, :text=>'aaa'))
f = TkVBBox.new(:borderwidth=>3, :relief=>'ridge').pack(:fill=>:x)
f.propagate = false
f.height 100
f.add(TkFrame.new(f){|ff|
TkButton.new(ff, :text=>'a').pack(:pady=>4, :padx=>6,
:fill=>:both, :expand=>true)
},
TkFrame.new(f){|ff|
TkButton.new(ff, :text=>'aa').pack(:pady=>4, :padx=>6,
:fill=>:both, :expand=>true)
},
TkFrame.new(f){|ff|
TkButton.new(ff, :text=>'aaaa').pack(:pady=>4, :padx=>6,
:fill=>:both, :expand=>true)
})
Tk.mainloop
end
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