diff options
Diffstat (limited to 'ruby_1_8_6/ext/tk/sample/demos-en/cscroll.rb')
| -rw-r--r-- | ruby_1_8_6/ext/tk/sample/demos-en/cscroll.rb | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/ruby_1_8_6/ext/tk/sample/demos-en/cscroll.rb b/ruby_1_8_6/ext/tk/sample/demos-en/cscroll.rb new file mode 100644 index 0000000000..0838dfbe08 --- /dev/null +++ b/ruby_1_8_6/ext/tk/sample/demos-en/cscroll.rb @@ -0,0 +1,134 @@ +# cscroll.rb +# +# This demonstration script creates a simple canvas that can be +# scrolled in two dimensions. +# +# simple scrollable canvas widget demo (called by 'widget') +# + +# toplevel widget +if defined?($cscroll_demo) && $cscroll_demo + $cscroll_demo.destroy + $cscroll_demo = nil +end + +# demo toplevel widget +$cscroll_demo = TkToplevel.new {|w| + title("Scrollable Canvas Demonstration") + iconname("cscroll") + positionWindow(w) +} + +# label +TkLabel.new($cscroll_demo, 'font'=>$font, 'wraplength'=>'4i', + 'justify'=>'left', 'text'=>"This window displays a canvas widget that can be scrolled either using the scrollbars or by dragging with button 2 in the canvas. If you click button 1 on one of the rectangles, its indices will be printed on stdout."){ + pack('side'=>'top') +} + +# frame +$cscroll_buttons = TkFrame.new($cscroll_demo) {|frame| + TkButton.new(frame) { + text 'Dismiss' + command proc{ + tmppath = $cscroll_demo + $cscroll_demo = nil + tmppath.destroy + } + }.pack('side'=>'left', 'expand'=>'yes') + + TkButton.new(frame) { + text 'Show Code' + command proc{showCode 'cscroll'} + }.pack('side'=>'left', 'expand'=>'yes') +} +$cscroll_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m') + +# frame +unless $tk_version =~ /^4\.[01]/ + $cscroll_grid = TkFrame.new($cscroll_demo) { + pack('expand'=>'yes', 'fill'=>'both', 'padx'=>1, 'pady'=>1) + } + TkGrid.rowconfigure($cscroll_grid, 0, 'weight'=>1, 'minsize'=>0) + TkGrid.columnconfigure($cscroll_grid, 0, 'weight'=>1, 'minsize'=>0) +end + +# canvas +$cscroll_canvas = TkCanvas.new($cscroll_demo, + 'relief'=>'sunken', 'borderwidth'=>2, + 'scrollregion'=>['-11c', '-11c', '50c', '20c'] + ) {|c| + if $tk_version =~ /^4\.[01]/ + pack('expand'=>'yes', 'fill'=>'both') + else + grid('in'=>$cscroll_grid, 'padx'=>1, 'pady'=>1, 'row'=>0, 'column'=>0, + 'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news') + end + + TkScrollbar.new($cscroll_demo, 'command'=>proc{|*args| c.yview(*args)}) {|vs| + c.yscrollcommand(proc{|first,last| vs.set first,last}) + if $tk_version =~ /^4\.[01]/ + pack('side'=>'right', 'fill'=>'y') + else + grid('in'=>$cscroll_grid, 'padx'=>1, 'pady'=>1, 'row'=>0, 'column'=>1, + 'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news') + end + } + + TkScrollbar.new($cscroll_demo, 'orient'=>'horiz', + 'command'=>proc{|*args| c.xview(*args)}) {|hs| + c.xscrollcommand(proc{|first,last| hs.set first,last}) + if $tk_version =~ /^4\.[01]/ + pack('side'=>'bottom', 'fill'=>'x') + else + grid('in'=>$cscroll_grid, 'padx'=>1, 'pady'=>1, 'row'=>1, 'column'=>0, + 'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news') + end + } +} + +bg = $cscroll_canvas.configinfo('bg')[4] +(0..19).each{|i| + x = -10+3*i + y = -10 + (0..9).each{|j| + TkcRectangle.new($cscroll_canvas, "#{x}c", "#{y}c", "#{x+2}c", "#{y+2}c", + 'outline'=>'black', 'fill'=>bg, 'tags'=>'rect') + TkcText.new($cscroll_canvas, "#{x+1}c", "#{y+1}c", + 'text'=>"#{i},#{j}", 'anchor'=>'center', 'tags'=>'text') + y += 3 + } +} + +$cscroll_canvas.itembind('all', 'Any-Enter', proc{scrollEnter $cscroll_canvas}) +$cscroll_canvas.itembind('all', 'Any-Leave', proc{scrollLeave $cscroll_canvas}) +$cscroll_canvas.itembind('all', '1', proc{scrollButton $cscroll_canvas}) +$cscroll_canvas.itembind('all', 'Any-Enter', proc{scrollEnter $cscroll_canvas}) +$cscroll_canvas.bind('2', proc{|x,y| $cscroll_canvas.scan_mark(x,y)}, '%x %y') +$cscroll_canvas.bind('B2-Motion', + proc{|x,y| $cscroll_canvas.scan_dragto(x,y)}, '%x %y') + +def scrollEnter(c) + id = c.find_withtag('current')[0].id + id -= 1 if c.gettags('current').include?('text') + $oldFill = c.itemconfiginfo(id, 'fill')[4] + if TkWinfo.depth(c) > 1 + c.itemconfigure(id, 'fill'=>'SeaGreen1') + else + c.itemconfigure(id, 'fill'=>'black') + c.itemconfigure(id+1, 'fill'=>'white') + end +end + +def scrollLeave(c) + id = c.find_withtag('current')[0].id + id -= 1 if c.gettags('current').include?('text') + c.itemconfigure(id, 'fill'=>$oldFill) + c.itemconfigure(id+1, 'fill'=>'black') +end + +def scrollButton(c) + id = c.find_withtag('current')[0].id + id += 1 unless c.gettags('current').include?('text') + print "You buttoned at #{c.itemconfiginfo(id,'text')[4]}\n" +end + |