120 lines
4.1 KiB
Ruby
120 lines
4.1 KiB
Ruby
# tree.rb --
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#
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# This demonstration script creates a toplevel window containing a Ttk
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# tree widget.
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#
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# based on "Id: tree.tcl,v 1.4 2007/12/13 15:27:07 dgp Exp"
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if defined?($tree_demo) && $tree_demo
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$tree_demo.destroy
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$tree_demo = nil
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end
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$tree_demo = TkToplevel.new {|w|
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title("Directory Browser")
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iconname("tree")
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positionWindow(w)
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}
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base_frame = TkFrame.new($tree_demo).pack(:fill=>:both, :expand=>true)
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## Explanatory text
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Ttk::Label.new(base_frame, :font=>$font, :wraplength=>'4i',
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:justify=>:left, :anchor=>'n', :padding=>[10, 2, 10, 6],
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:text=><<EOL).pack(:fill=>:x)
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Ttk is the new Tk themed widget set. \
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One of the widgets it includes is a tree widget, \
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which allows the user to browse a hierarchical data-set such as a filesystem. \
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The tree widget not only allows for the tree part itself, \
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but it also supports an arbitrary number of additional columns \
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which can show additional data (in this case, the size of the files \
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found in your filesystem). \
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You can also change the width of the columns \
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by dragging the boundary between them.
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EOL
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## See Code / Dismiss
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Ttk::Frame.new(base_frame) {|frame|
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sep = Ttk::Separator.new(frame)
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Tk.grid(sep, :columnspan=>4, :row=>0, :sticky=>'ew', :pady=>2)
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TkGrid('x',
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Ttk::Button.new(frame, :text=>'See Code',
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:image=>$image['view'], :compound=>:left,
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:command=>proc{showCode 'tree'}),
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Ttk::Button.new(frame, :text=>'Dismiss',
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:image=>$image['delete'], :compound=>:left,
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:command=>proc{
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$tree_demo.destroy
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$tree_demo = nil
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}),
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:padx=>4, :pady=>4)
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grid_columnconfigure(0, :weight=>1)
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pack(:side=>:bottom, :fill=>:x)
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}
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## Code to populate the roots of the tree (can be more than one on Windows)
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def populate_roots(tree)
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TkComm.simplelist(Tk.tk_call('file', 'volumes')).sort.each{|dir|
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populate_tree(tree, tree.insert(nil, :end, :text=>dir,
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:values=>[dir, 'directory']))
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}
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end
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## Code to populate a node of the tree
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def populate_tree(tree, node)
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return if tree.get(node, :type) != 'directory'
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path = tree.get(node, :fullpath)
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tree.delete(tree.children(node))
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Dir.glob("#{path}/*").sort.each{|f|
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type = File.ftype(f)
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id = tree.insert(node, :end,
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:text=>File.basename(f), :values=>[f, type]).id
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if type == 'directory'
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## Make it so that this node is openable
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tree.insert(id, 0, :text=>'dummy')
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tree.itemconfigure(id, :text=>File.basename(f))
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elsif type == 'file'
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size = File.size(f)
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if size >= 1024*1024*1024
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size = '%.1f GB' % (size.to_f/1024/1024/1024)
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elsif size >= 1024*1024
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size = '%.1f MB' % (size.to_f/1024/1024)
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elsif size >= 1024
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size = '%.1f KB' % (size.to_f/1024)
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else
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size = '%.1f bytes' % (size.to_f/1024)
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end
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tree.set(id, :size, size)
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end
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}
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# Stop this code from rerunning on the current node
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tree.set(node, :type, 'processed_directory')
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end
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## Create the tree and set it up
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tree = Ttk::Treeview.new(base_frame, :columns=>%w(fullpath type size),
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:displaycolumns=>['size'])
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if Tk.windowingsystem != 'aqua'
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vsb = tree.yscrollbar(Ttk::Scrollbar.new(base_frame))
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hsb = tree.xscrollbar(Ttk::Scrollbar.new(base_frame))
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else
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vsb = tree.yscrollbar(Tk::Scrollbar.new(base_frame))
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hsb = tree.xscrollbar(Tk::Scrollbar.new(base_frame))
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end
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tree.heading_configure('#0', :text=>'Directory Structure')
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tree.heading_configure('size', :text=>'File Size')
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tree.column_configure('size', :stretch=>0, :width=>70)
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populate_roots(tree)
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tree.bind('<TreeviewOpen>', '%W'){|w| populate_tree(w, w.focus_item)}
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## Arrange the tree and its scrollbars in the toplevel
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container = Ttk::Frame.new(base_frame).pack(:fill=>:both, :expand=>true)
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container.lower
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Tk.grid(tree, vsb, :in=>container, :sticky=>'nsew')
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Tk.grid(hsb, :in=>container, :sticky=>'nsew')
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container.grid_columnconfigure(0, :weight=>1)
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container.grid_rowconfigure(0, :weight=>1)
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