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|
#
# Text Search widget demo (called by 'widget')
#
# textLoadFile --
# This method below loads a file into a text widget, discarding
# the previous contents of the widget. Tags for the old widget are
# not affected, however.
#
# Arguments:
# w - The window into which to load the file. Must be a
# text widget.
# file - The name of the file to load. Must be readable.
def textLoadFile(w,file)
w.delete('1.0', 'end')
f = open(file, 'r')
while(!f.eof?)
w.insert('end', f.read(1000))
end
f.close
end
# textSearch --
# Search for all instances of a given string in a text widget and
# apply a given tag to each instance found.
#
# Arguments:
# w - The window in which to search. Must be a text widget.
# string - The string to search for. The search is done using
# exact matching only; no special characters.
# tag - Tag to apply to each instance of a matching string.
def textSearch(w, string, tag)
tag.remove('0.0', 'end')
return if string == ""
cur = '1.0'
loop {
cur, len = w.search_with_length(string, cur, 'end')
break if cur == ""
tag.add(cur, "#{cur} + #{len} char")
cur = w.index("#{cur} + #{len} char")
}
end
# textToggle --
# This method is invoked repeatedly to invoke two commands at
# periodic intervals. It normally reschedules itself after each
# execution but if an error occurs (e.g. because the window was
# deleted) then it doesn't reschedule itself.
#
# Arguments:
# cmd1 - Command to execute when method is called.
# sleep1 - Ms to sleep after executing cmd1 before executing cmd2.
# cmd2 - Command to execute in the *next* invocation of this method.
# sleep2 - Ms to sleep after executing cmd2 before executing cmd1 again.
def textToggle(cmd1,sleep1,cmd2,sleep2)
sleep_list = [sleep2, sleep1]
TkAfter.new(proc{sleep = sleep_list.shift; sleep_list.push(sleep); sleep},
-1, cmd1, cmd2).start(sleep1)
end
# toplevel widget が存在すれば削除する
if defined?($search_demo) && $search_demo
$search_demo.destroy
$search_demo = nil
end
# demo 用の toplevel widget を生成
$search_demo = TkToplevel.new {|w|
title("Text Demonstration - Search and Highlight")
iconname("search")
positionWindow(w)
}
# frame 生成
$search_buttons = TkFrame.new($search_demo) {|frame|
TkButton.new(frame) {
#text '了解'
text '閉じる'
command proc{
tmppath = $search_demo
$search_demo = nil
tmppath.destroy
}
}.pack('side'=>'left', 'expand'=>'yes')
TkButton.new(frame) {
text 'コード参照'
command proc{showCode 'search'}
}.pack('side'=>'left', 'expand'=>'yes')
}
$search_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
# frame 生成
TkFrame.new($search_demo) {|f|
TkLabel.new(f, 'text'=>'ファイル名:',
'width'=>13, 'anchor'=>'w').pack('side'=>'left')
$search_fileName = TkVariable.new
TkEntry.new(f, 'width'=>40,
'textvariable'=>$search_fileName) {
pack('side'=>'left')
bind('Return', proc{textLoadFile($search_text, $search_fileName.value)
$search_string_entry.focus})
focus
}
TkButton.new(f, 'text'=>'読み込み',
'command'=>proc{textLoadFile($search_text,
$search_fileName.value)})\
.pack('side'=>'left', 'pady'=>5, 'padx'=>10)
}.pack('side'=>'top', 'fill'=>'x')
TkFrame.new($search_demo) {|f|
TkLabel.new(f, 'text'=>'検索文字列:',
'width'=>13, 'anchor'=>'w').pack('side'=>'left')
$search_searchString = TkVariable.new
$search_string_entry = TkEntry.new(f, 'width'=>40,
'textvariable'=>$search_searchString) {
pack('side'=>'left')
bind('Return', proc{textSearch($search_text, $search_searchString.value,
$search_Tag)})
}
TkButton.new(f, 'text'=>'反転',
'command'=>proc{textSearch($search_text,
$search_searchString.value,
$search_Tag)}) {
pack('side'=>'left', 'pady'=>5, 'padx'=>10)
}
}.pack('side'=>'top', 'fill'=>'x')
$search_text = TkText.new($search_demo, 'setgrid'=>true) {|t|
$search_Tag = TkTextTag.new(t)
TkScrollbar.new($search_demo, 'command'=>proc{|*args| t.yview(*args)}) {|sc|
t.yscrollcommand(proc{|first,last| sc.set first,last})
pack('side'=>'right', 'fill'=>'y')
}
pack('expand'=>'yes', 'fill'=>'both')
}
# Set up display styles for text highlighting.
if TkWinfo.depth($search_demo) > 1
textToggle(proc{
$search_Tag.configure('background'=>'#ce5555',
'foreground'=>'white')
},
800,
proc{
$search_Tag.configure('background'=>'', 'foreground'=>'')
},
200 )
else
textToggle(proc{
$search_Tag.configure('background'=>'black',
'foreground'=>'white')
},
800,
proc{
$search_Tag.configure('background'=>'', 'foreground'=>'')
},
200 )
end
$search_text.insert('1.0', "\
このウィンドウは検索機構を実現するのにテキスト widget のタグ機能がどの \
ように使われるのかをデモするものです。まず上のエントリにファイル名を入 \
れ、<リターン> を押すか「ロード」ボタンを押してください。次にその下の \
エントリに文字列を入力し、<リターン> を押すか「反転」ボタンを押してく \
ださい。するとファイル中の、検索文字列と一致する部分に全て \"search_Tag\" \
というタグがつけられ、タグの表示属性としてその文字列が点滅するように \
設定されます。")
$search_text.set_insert '0.0'
$search_fileName.value = ''
$search_searchString.value = ''
|
