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Diffstat (limited to 'ruby_2_2/ext/tk/sample/demos-en/entry3.rb')
| -rw-r--r-- | ruby_2_2/ext/tk/sample/demos-en/entry3.rb | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/ruby_2_2/ext/tk/sample/demos-en/entry3.rb b/ruby_2_2/ext/tk/sample/demos-en/entry3.rb deleted file mode 100644 index d3bc629fdf..0000000000 --- a/ruby_2_2/ext/tk/sample/demos-en/entry3.rb +++ /dev/null @@ -1,220 +0,0 @@ -# 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) -} - -base_frame = TkFrame.new($entry3_demo).pack(:fill=>:both, :expand=>true) - -TkLabel.new(base_frame, - :font=>$font, :wraplength=>'5i', :justify=>:left, - :text=><<EOL).pack(:side=>:top) -Four different entries are displayed below. You can add characters \ -by pointing, clicking and typing, though each is constrained in what \ -it will accept. The first only accepts integers or the empty string \ -(checking when focus leaves it) and will flash to indicate any \ -problem. The second only accepts strings with fewer than ten \ -characters and sounds the bell when an attempt to go over the limit \ -is made. The third accepts US phone numbers, mapping letters to \ -their digit equivalent and sounding the bell on encountering an \ -invalid character or if trying to type over a character that is not \ -a digit. The fourth is a password field that accepts up to eight \ -characters (silently ignoring further ones), and displaying them as \ -asterisk characters. -EOL - -TkFrame.new(base_frame){|f| - pack(:side=>:bottom, :fill=>:x, :pady=>'2m') - - TkButton.new(f, :text=>'Dismiss', :width=>15, :command=>proc{ - $entry3_demo.destroy - $entry3_demo = nil - }).pack(:side=>:left, :expand=>true) - - TkButton.new(f, :text=>'See Code', :width=>15, :command=>proc{ - showCode 'entry3' - }).pack(:side=>:left, :expand=>true) -} - -# focusAndFlash -- -# Error handler for entry widgets that forces the focus onto the -# widget and makes the widget flash by exchanging the foreground and -# background colours at intervals of 200ms (i.e. at approximately -# 2.5Hz). -# -# Arguments: -# widget - entry widget to flash -# fg - Initial foreground colour -# bg - Initial background colour -# count - Counter to control the number of times flashed -def focusAndFlash(widget, fg, bg, count=5) - return if count <= 0 - if fg && !fg.empty? && bg && !bg.empty? - TkTimer.new(200, count, - proc{widget.configure(:foreground=>bg, :background=>fg)}, - proc{widget.configure(:foreground=>fg, :background=>bg)} - ).start - else - # TkTimer.new(150, 3){Tk.bell}.start - Tk.bell - TkTimer.new(200, count, - proc{widget.configure(:foreground=>'white', - :background=>'black')}, - proc{widget.configure(:foreground=>'black', - :background=>'white')} - ).at_end{begin - widget.configure(:foreground=>fg, - :background=>bg) - rescue - # ignore - end}.start - end - widget.focus(true) -end - -l1 = TkLabelFrame.new(base_frame, :text=>"Integer Entry") -TkEntry.new(l1, :validate=>:focus, - :vcmd=>[ - proc{|s| s == '' || /^[+-]?\d+$/ =~ s }, '%P' - ]) {|e| - fg = e.foreground - bg = e.background - invalidcommand [proc{|w| focusAndFlash(w, fg, bg)}, '%W'] - pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m') -} - -l2 = TkLabelFrame.new(base_frame, :text=>"Length-Constrained Entry") -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)}) - return true - # Tk.update(true) # <- Don't work 'update' inter validation callback. - # It depends on Tcl/Tk side (tested on Tcl/Tk8.5a1). - end - return false -end - - -l3 = TkLabelFrame.new(base_frame, :text=>"US Phone-Number Entry") -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(base_frame, :text=>"Password Entry") -TkEntry.new(l4, :validate=>:key, :show=>'*', - :vcmd=>[ - proc{|s| s.length <= 8}, - '%P' - ]).pack(:fill=>:x, :expand=>true, :padx=>'1m', :pady=>'1m') - -TkFrame.new(base_frame){|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) -} |