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Diffstat (limited to 'ruby_1_8_5/ext/tk/sample/demos-en/ctext.rb')
| -rw-r--r-- | ruby_1_8_5/ext/tk/sample/demos-en/ctext.rb | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/ruby_1_8_5/ext/tk/sample/demos-en/ctext.rb b/ruby_1_8_5/ext/tk/sample/demos-en/ctext.rb new file mode 100644 index 0000000000..dbb5e32638 --- /dev/null +++ b/ruby_1_8_5/ext/tk/sample/demos-en/ctext.rb @@ -0,0 +1,186 @@ +# ctext.rb +# +# This demonstration script creates a canvas widget with a text +# item that can be edited and reconfigured in various ways. +# +# Canvas Text widget demo (called by 'widget') +# + +# toplevel widget +if defined?($ctext_demo) && $ctext_demo + $ctext_demo.destroy + $ctext_demo = nil +end + +# demo toplevel widget +$ctext_demo = TkToplevel.new {|w| + title("Canvas Text Demonstration") + iconname("Text") + positionWindow(w) +} + +# label +TkLabel.new($ctext_demo, 'font'=>$font, 'wraplength'=>'5i', 'justify'=>'left', + 'text'=>"This window displays a string of text to demonstrate the text facilities of canvas widgets. You can click in the boxes to adjust the position of the text relative to its positioning point or change its justification. The text also supports the following simple bindings for editing: + 1. You can point, click, and type. + 2. You can also select with button 1. + 3. You can copy the selection to the mouse position with button 2. + 4. Backspace and Control+h delete the selection if there is one; + otherwise they delete the character just before the insertion cursor. + 5. Delete deletes the selection if there is one; otherwise it deletes + the character just after the insertion cursor."){ + pack('side'=>'top') +} + +# frame +$ctext_buttons = TkFrame.new($ctext_demo) {|frame| + TkButton.new(frame) { + text 'Dismiss' + command proc{ + tmppath = $ctext_demo + $ctext_demo = nil + tmppath.destroy + } + }.pack('side'=>'left', 'expand'=>'yes') + + TkButton.new(frame) { + text 'Show Code' + command proc{showCode 'ctext'} + }.pack('side'=>'left', 'expand'=>'yes') +} +$ctext_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m') + +# canvas +$ctext_canvas = TkCanvas.new($ctext_demo, 'relief'=>'flat', + 'borderwidth'=>0, 'width'=>500, 'height'=>350) +$ctext_canvas.pack('side'=>'top', 'expand'=>'yes', 'fill'=>'both') + +# font +textFont = '-*-Helvetica-Medium-R-Normal--*-240-*-*-*-*-*-*' + +# canvas +TkcRectangle.new($ctext_canvas, 245, 195, 255, 205, + 'outline'=>'black', 'fill'=>'red') + +$ctag_text = TkcTag.new($ctext_canvas) +$ctag_text.withtag(TkcText.new($ctext_canvas, 250, 200, + 'text'=>"This is just a string of text to demonstrate the text facilities of canvas widgets. Bindings have been been defined to support editing (see above).", + 'width'=>440, 'anchor'=>'n', + 'font'=>'-*-Helvetica-Medium-R-Normal--*-240-*-*-*-*-*-*', + 'kanjifont'=>'-*--24-*-jisx0208.1983-0', + 'justify'=>'left') ) + +$ctag_text.bind('1', proc{|x,y| textB1Press $ctext_canvas,x,y}, "%x %y") +$ctag_text.bind('B1-Motion', proc{|x,y| textB1Move $ctext_canvas,x,y}, "%x %y") +$ctag_text.bind('Shift-1', + proc{|x,y| $ctext_canvas.seleect_adjust 'current', "@#{x},#{y}"}, + "%x %y") +$ctag_text.bind('Shift-B1-Motion', + proc{|x,y| textB1Move $ctext_canvas,x,y}, "%x %y") +$ctag_text.bind('KeyPress', proc{|a| textInsert $ctext_canvas,a}, "%A") +$ctag_text.bind('Return', proc{textInsert $ctext_canvas,"\n"}) +$ctag_text.bind('Control-h', proc{textBs $ctext_canvas}) +$ctag_text.bind('BackSpace', proc{textBs $ctext_canvas}) +$ctag_text.bind('Delete', proc{textDel $ctext_canvas}) +$ctag_text.bind('2', proc{|x,y| textPaste $ctext_canvas, "@#{x},#{y}"}, + "%x %y") + +# Next, create some items that allow the text's anchor position +# to be edited. + +def mkTextConfig(w,x,y,option,value,color) + item = TkcRectangle.new(w, x, y, x+30, y+30, + 'outline'=>'black', 'fill'=>color, 'width'=>1) + item.bind('1', proc{$ctag_text.configure option, value}) + w.addtag_withtag('config', item) +end + +x = 50 +y = 50 +color = 'LightSkyBlue1' +mkTextConfig $ctext_canvas, x, y, 'anchor', 'se', color +mkTextConfig $ctext_canvas, x+30, y, 'anchor', 's', color +mkTextConfig $ctext_canvas, x+60, y, 'anchor', 'sw', color +mkTextConfig $ctext_canvas, x, y+30, 'anchor', 'e', color +mkTextConfig $ctext_canvas, x+30, y+30, 'anchor', 'center', color +mkTextConfig $ctext_canvas, x+60, y+30, 'anchor', 'w', color +mkTextConfig $ctext_canvas, x, y+60, 'anchor', 'ne', color +mkTextConfig $ctext_canvas, x+30, y+60, 'anchor', 'n', color +mkTextConfig $ctext_canvas, x+60, y+60, 'anchor', 'nw', color +item = TkcRectangle.new($ctext_canvas, x+40, y+40, x+50, y+50, + 'outline'=>'black', 'fill'=>'red') +item.bind('1', proc{$ctag_text.configure 'anchor', 'center'}) +TkcText.new($ctext_canvas, x+45, y-5, 'text'=>'Text Position', 'anchor'=>'s', + 'font'=>'-*-times-medium-r-normal--*-240-*-*-*-*-*-*', + 'fill'=>'brown') + +# Lastly, create some items that allow the text's justification to be +# changed. + +x = 350 +y = 50 +color = 'SeaGreen2' +mkTextConfig $ctext_canvas, x, y, 'justify', 'left', color +mkTextConfig $ctext_canvas, x+30, y, 'justify', 'center', color +mkTextConfig $ctext_canvas, x+60, y, 'justify', 'right', color +TkcText.new($ctext_canvas, x+45, y-5, 'text'=>'Justification', 'anchor'=>'s', + 'font'=>'-*-times-medium-r-normal--*-240-*-*-*-*-*-*', + 'fill'=>'brown') + +$ctext_canvas.itembind('config', 'Enter', proc{textEnter $ctext_canvas}) +$ctext_canvas.itembind('config', 'Leave', + proc{$ctext_canvas\ + .itemconfigure('current', + 'fill'=>$textConfigFill)}) + +$textConfigFill = '' + +def textEnter(w) + $textConfigFill = (w.itemconfiginfo 'current', 'fill')[4] + w.itemconfigure 'current', 'fill', 'black' +end + +def textInsert(w, string) + return if string == "" + begin + $ctag_text.dchars 'sel.first', 'sel.last' + rescue + end + $ctag_text.insert 'insert', string +end + +def textPaste(w, pos) + begin + $ctag_text.insert pos, TkSelection.get + rescue + end +end + +def textB1Press(w,x,y) + w.icursor 'current', "@#{x},#{y}" + w.itemfocus 'current' + w.focus + w.select_from 'current', "@#{x},#{y}" +end + +def textB1Move(w,x,y) + w.select_to 'current', "@#{x},#{y}" +end + +def textBs(w) + begin + $ctag_text.dchars 'sel.first', 'sel.last' + rescue + char = $ctag_text.index('insert').to_i - 1 + $ctag_text.dchars(char) if char >= 0 + end +end + +def textDel(w) + begin + $ctag_text.dchars 'sel.first', 'sel.last' + rescue + $ctag_text.dchars 'insert' + end +end + |