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# entry3.rb --
#
# This demonstration script creates several entry widgets whose
# permitted input is constrained in some way. It also shows off a
# password entry.
#
# based on Tcl/Tk8.4.4 widget demos
if defined?($entry3_demo) && $entry3_demo
$entry3_demo.destroy
$entry3_demo = nil
end
$entry3_demo = TkToplevel.new {|w|
title("Constrained Entry Demonstration")
iconname("entry3")
positionWindow(w)
}
TkLabel.new($entry3_demo,
:font=>$font, :wraplength=>'5i', :justify=>:left,
:text=><<EOL).pack(:side=>:top)
ʲˤϣΥȥܥåɽƤޤƥȥܥåϡ\
ޥåʸǤळȤǽǤ줾줬ɤΤ褦\
Ϥդ뤳ȤǤ뤫ˤߤƤޤ\
ĤΥȥܥåȸʤʸʸʤξ֤\
ξդ꤬ϥȥܥåǤޤ\
ʥե˥åޤˡ\
ĤΥȥܥåϡϤ줿ʸĹ\
ʸ̤ξդ¤ۤƽ⤦ȤȤˤ\
٥Ĥ餷Τ餻ޤ\
Ĥƹֹդ륨ȥܥåǤ\
ե٥åȤϡõΥбŤƤѴޤ\
ŬڤʸϤ줿ʳʸΰ֤˿Ϥ褦Ȥ\
ˤϷٹΥ٥뤬Ĥޤ\
ͤĤΥȥܥåϡʸޤǤϤդ\
ѥɥեɤǤʣʸʾä˷ٹФȤʤ̵뤵ޤˡ\
Ϥ줿ʸϥꥹ֤ɽޤ
EOL
TkFrame.new($entry3_demo){|f|
pack(:side=>:bottom, :fill=>:x, :pady=>'2m')
TkButton.new(f, :text=>'Ĥ', :width=>15, :command=>proc{
$entry3_demo.destroy
$entry3_demo = nil
}).pack(:side=>:left, :expand=>true)
TkButton.new(f, :text=>'ɻ', :width=>15, :command=>proc{
showCode 'entry3'
}).pack(:side=>:left, :expand=>true)
}
# focusAndFlash --
# Error handler for entry widgets that forces the focus onto the
# widget and makes the widget flash by exchanging the foreground and
# background colours at intervals of 200ms (i.e. at approximately
# 2.5Hz).
#
# Arguments:
# widget - entry widget to flash
# fg - Initial foreground colour
# bg - Initial background colour
# count - Counter to control the number of times flashed
def focusAndFlash(widget, fg, bg, count=5)
return if count <= 0
TkTimer.new(100, count,
proc{widget.configure(:foreground=>bg, :background=>fg)},
proc{widget.configure(:foreground=>fg, :background=>bg)}
).start
widget.focus(true)
end
l1 = TkLabelFrame.new($entry3_demo, :text=>"ȥ")
TkEntry.new(l1, :validate=>:focus,
:vcmd=>[
proc{|s| s == '' || /^[+-]?\d+$/ =~ s }, '%P'
]) {|e|
invalidcommand [proc{|w| focusAndFlash(w, e.fg, e.bg)}, '%W']
pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m')
}
l2 = TkLabelFrame.new($entry3_demo, :text=>"Ĺդȥ")
TkEntry.new(l2, :validate=>:key, :invcmd=>proc{Tk.bell},
:vcmd=>[proc{|s| s.length < 10}, '%P']
).pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m')
### PHONE NUMBER ENTRY ###
# Note that the source to this is quite a bit longer as the behaviour
# demonstrated is a lot more ambitious than with the others.
# Initial content for the third entry widget
entry3content = TkVariable.new("1-(000)-000-0000")
# Mapping from alphabetic characters to numbers.
$phoneNumberMap = {}
Hash[*(%w(abc 2 def 3 ghi 4 jkl 5 mno 6 pqrs 7 tuv 8 wxyz 9))].each{|chars, n|
chars.split('').each{|c|
$phoneNumberMap[c] = n
$phoneNumberMap[c.upcase] = n
}
}
# phoneSkipLeft --
# Skip over fixed characters in a phone-number string when moving left.
#
# Arguments:
# widget - The entry widget containing the phone-number.
def phoneSkipLeft(widget)
idx = widget.index('insert')
if idx == 8
# Skip back two extra characters
widget.cursor = idx - 2
elsif idx == 7 || idx == 12
# Skip back one extra character
widget.cursor = idx - 1
elsif idx <= 3
# Can't move any further
Tk.bell
Tk.callback_break
end
end
# phoneSkipRight --
# Skip over fixed characters in a phone-number string when moving right.
#
# Arguments:
# widget - The entry widget containing the phone-number.
# add - Offset to add to index before calculation (used by validation.)
def phoneSkipRight(widget, add = 0)
idx = widget.index('insert')
if (idx + add == 5)
# Skip forward two extra characters
widget.cursor = idx + 2
elsif (idx + add == 6 || idx + add == 10)
# Skip forward one extra character
widget.cursor = idx + 1
elsif (idx + add == 15 && add == 0)
# Can't move any further
Tk.bell
Tk.callback_break
end
end
# validatePhoneChange --
# Checks that the replacement (mapped to a digit) of the given
# character in an entry widget at the given position will leave a
# valid phone number in the widget.
#
# widget - entry widget to validate
# vmode - The widget's validation mode
# idx - The index where replacement is to occur
# char - The character (or string, though that will always be
# refused) to be overwritten at that point.
def validatePhoneChange(widget, vmode, idx, char)
return true if idx == nil
Tk.after_idle(proc{widget.configure(:validate=>vmode,
:invcmd=>proc{Tk.bell})})
if !(idx<3 || idx==6 || idx==7 || idx==11 || idx>15) && char =~ /[0-9A-Za-z]/
widget.delete(idx)
widget.insert(idx, $phoneNumberMap[char] || char)
Tk.after_idle(proc{phoneSkipRight(widget, -1)})
# Tk.update(true) # Don't work 'update' inter validation callback.
# It depends on Tcl/Tk side (tested on Tcl/Tk8.5a1).
return true
end
return false
end
l3 = TkLabelFrame.new($entry3_demo, :text=>"ƹֹ楨ȥ")
TkEntry.new(l3, :validate=>:key, :invcmd=>proc{Tk.bell},
:textvariable=>entry3content,
:vcmd=>[
proc{|w,v,i,s| validatePhoneChange(w,v,i,s)},
"%W %v %i %S"
]){|e|
# Click to focus goes to the first editable character...
bind('FocusIn', proc{|d,w|
if d != "NotifyAncestor"
w.cursor = 3
Tk.after_idle(proc{w.selection_clear})
end
}, '%d %W')
bind('Left', proc{|w| phoneSkipLeft(w)}, '%W')
bind('Right', proc{|w| phoneSkipRight(w)}, '%W')
pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m')
}
l4 = TkLabelFrame.new($entry3_demo, :text=>"ѥɥȥ")
TkEntry.new(l4, :validate=>:key, :show=>'*',
:vcmd=>[
proc{|s| s.length <= 8},
'%P'
]).pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m')
TkFrame.new($entry3_demo){|f|
lower
TkGrid.configure(l1, l2, :in=>f, :padx=>'3m', :pady=>'1m', :sticky=>:ew)
TkGrid.configure(l3, l4, :in=>f, :padx=>'3m', :pady=>'1m', :sticky=>:ew)
TkGrid.columnconfigure(f, [0,1], :uniform=>1)
pack(:fill=>:both, :expand=>true)
}
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