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Diffstat (limited to 'ruby_1_8_6/ext/tk/sample/demos-en/ruler.rb')
| -rw-r--r-- | ruby_1_8_6/ext/tk/sample/demos-en/ruler.rb | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/ruby_1_8_6/ext/tk/sample/demos-en/ruler.rb b/ruby_1_8_6/ext/tk/sample/demos-en/ruler.rb new file mode 100644 index 0000000000..4299d57b4f --- /dev/null +++ b/ruby_1_8_6/ext/tk/sample/demos-en/ruler.rb @@ -0,0 +1,203 @@ +# ruler.rb +# +# This demonstration script creates a canvas widget that displays a ruler +# with tab stops that can be set, moved, and deleted. +# +# ruler widget demo (called by 'widget') +# + +# rulerMkTab -- +# This method creates a new triangular polygon in a canvas to +# represent a tab stop. +# +# Arguments: +# c - The canvas window. +# x, y - Coordinates at which to create the tab stop. + +def rulerMkTab(c,x,y) + v = $demo_rulerInfo + TkcPolygon.new(c, x, y, x+v.size, y+v.size, x-v.size, y+v.size) +end + +# toplevel widget +if defined?($ruler_demo) && $ruler_demo + $ruler_demo.destroy + $ruler_demo = nil +end + +# demo toplevel widget +$ruler_demo = TkToplevel.new {|w| + title("Ruler Demonstration") + iconname("ruler") + positionWindow(w) +} + +# label +TkLabel.new($ruler_demo, 'font'=>$font, 'wraplength'=>'5i', 'justify'=>'left', + 'text'=>"This canvas widget shows a mock-up of a ruler. You can create tab stops by dragging them out of the well to the right of the ruler. You can also drag existing tab stops. If you drag a tab stop far enough up or down so that it turns dim, it will be deleted when you release the mouse button."){ + pack('side'=>'top') +} + +# frame +$ruler_buttons = TkFrame.new($ruler_demo) {|frame| + TkButton.new(frame) { + text 'Dismiss' + command proc{ + tmppath = $ruler_demo + $ruler_demo = nil + tmppath.destroy + } + }.pack('side'=>'left', 'expand'=>'yes') + + TkButton.new(frame) { + text 'Show Code' + command proc{showCode 'ruler'} + }.pack('side'=>'left', 'expand'=>'yes') +} +$ruler_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m') + +# canvas +$ruler_canvas = TkCanvas.new($ruler_demo, 'width'=>'14.8c', 'height'=>'2.5c') +$ruler_canvas.pack('side'=>'top', 'fill'=>'x') + +# +unless Struct.const_defined?("RulerInfo") + $demo_rulerInfo = Struct.new("RulerInfo", :grid, :left, :right, :x, :y, + :top, :bottom, :size, :normalStyle, + :activeStyle, :deleteStyle).new +end +$demo_rulerInfo.grid = '.25c' +$demo_rulerInfo.left = TkWinfo.fpixels($ruler_canvas, '1c') +$demo_rulerInfo.right = TkWinfo.fpixels($ruler_canvas, '13c') +$demo_rulerInfo.top = TkWinfo.fpixels($ruler_canvas, '1c') +$demo_rulerInfo.bottom = TkWinfo.fpixels($ruler_canvas, '1.5c') +$demo_rulerInfo.size = TkWinfo.fpixels($ruler_canvas, '.2c') +$demo_rulerInfo.normalStyle = {'fill'=>'black'} +if TkWinfo.depth($ruler_canvas) > 1 + $demo_rulerInfo.activeStyle = {'fill'=>'red', 'stipple'=>''} + $demo_rulerInfo.deleteStyle = {'fill'=>'red', + 'stipple'=>'@'+[$demo_dir, '..', + 'images', 'gray25.xbm'].join(File::Separator)} +else + $demo_rulerInfo.activeStyle = {'fill'=>'black', 'stipple'=>''} + $demo_rulerInfo.deleteStyle = {'fill'=>'black', + 'stipple'=>'@'+[$demo_dir, '..', + 'images', 'gray25.xbm'].join(File::Separator)} +end + +TkcLine.new($ruler_canvas, + '1c', '0.5c', '1c', '1c', '13c', '1c', '13c', '0.5c', 'width'=>1) +(0..11).each{|i| + x = i+1 + TkcLine.new($ruler_canvas, "#{x}c", '1c', "#{x}c", '0.6c', 'width'=>1) + TkcLine.new($ruler_canvas, "#{x}.25c", '1c', "#{x}.25c", '0.8c', 'width'=>1) + TkcLine.new($ruler_canvas, "#{x}.5c", '1c', "#{x}.5c", '0.7c', 'width'=>1) + TkcLine.new($ruler_canvas, "#{x}.75c", '1c', "#{x}.75c", '0.8c', 'width'=>1) + TkcText.new($ruler_canvas, "#{x}.15c", '0.75c', 'text'=>i, 'anchor'=>'sw') +} + +$rulerTag_well = TkcTag.new($ruler_canvas) +$ruler_canvas\ +.addtag_withtag($rulerTag_well, + TkcRectangle.new($ruler_canvas, + '13.2c', '1c', '13.8c', '0.5c', + 'outline'=>'black', + 'fill'=>($ruler_canvas\ + .configinfo('background'))[4]) ) +$ruler_canvas\ +.addtag_withtag($rulerTag_well, + rulerMkTab($ruler_canvas, + TkWinfo.pixels($ruler_canvas, '13.5c'), + TkWinfo.pixels($ruler_canvas, '.65c') ) ) + +$rulerTag_well.bind('1', proc{|x,y| rulerNewTab($ruler_canvas,x,y)}, '%x %y') +$ruler_canvas.itembind('tab', '1', + proc{|x,y| rulerSelectTab($ruler_canvas,x,y)}, '%x %y') +$ruler_canvas.bind('B1-Motion', + proc{|x,y| rulerMoveTab($ruler_canvas,x,y)}, '%x %y') +$ruler_canvas.bind('Any-ButtonRelease-1', proc{rulerReleaseTab($ruler_canvas)}) + +# rulerNewTab -- +# Does all the work of creating a tab stop, including creating the +# triangle object and adding tags to it to give it tab behavior. +# +# Arguments: +# c - The canvas window. +# x, y - The coordinates of the tab stop. + +def rulerNewTab(c,x,y) + v = $demo_rulerInfo + c.addtag_withtag('active', rulerMkTab(c,x,y)) + c.addtag_withtag('tab', 'active') + v.x = x + v.y = y + rulerMoveTab(c,x,y) +end + +# rulerSelectTab -- +# This method is invoked when mouse button 1 is pressed over +# a tab. It remembers information about the tab so that it can +# be dragged interactively. +# +# Arguments: +# c - The canvas widget. +# x, y - The coordinates of the mouse (identifies the point by +# which the tab was picked up for dragging). + +def rulerSelectTab(c,x,y) + v = $demo_rulerInfo + v.x = c.canvasx(x, v.grid) + v.y = v.top+2 + c.addtag_withtag('active', 'current') + c.itemconfigure('active', v.activeStyle) + c.raise('active') +end + +# rulerMoveTab -- +# This method is invoked during mouse motion events to drag a tab. +# It adjusts the position of the tab, and changes its appearance if +# it is about to be dragged out of the ruler. +# +# Arguments: +# c - The canvas widget. +# x, y - The coordinates of the mouse. + +def rulerMoveTab(c,x,y) + v = $demo_rulerInfo + return if c.find_withtag('active') == [] + cx = c.canvasx(x,v.grid) + cy = c.canvasy(y) + cx = v.left if cx < v.left + cx = v.right if cx > v.right + if (cy >= v.top && cy <= v.bottom) + cy = v.top+2 + c.itemconfigure('active', v.activeStyle) + else + cy = cy-v.size-2 + c.itemconfigure('active', v.deleteStyle) + end + c.move('active', cx-v.x, cy-v.y) + v.x = cx + v.y = cy +end + +# rulerReleaseTab -- +# This method is invoked during button release events that end +# a tab drag operation. It deselects the tab and deletes the tab if +# it was dragged out of the ruler. +# +# Arguments: +# c - The canvas widget. +# x, y - The coordinates of the mouse. + +def rulerReleaseTab(c) + v = $demo_rulerInfo + return if c.find_withtag('active') == [] + if v.y != v.top+2 + c.delete('active') + else + c.itemconfigure('active', v.normalStyle) + c.dtag('active') + end +end + |