Class: VER::Help::DescribeKey

Inherits:
Object
  • Object
show all
Defined in:
lib/ver/help/describe_key.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent) ⇒ DescribeKey

Returns a new instance of DescribeKey.



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# File 'lib/ver/help/describe_key.rb', line 4

def initialize(parent)
  @parent = parent
  @full = []
  setup_widgets
end

Instance Method Details

#destroy ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 69

def destroy
  @label.destroy
  @label_frame.destroy
  @parent.focus
end

#inspect ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 65

def inspect
  "#<VER::Help::DescribeKey>"
end

#lookup(sequence) ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 41

def lookup(sequence)
  old_callback = @parent.keymap.callback
  @parent.keymap.callback = self

  @full << sequence
  @parent.keymap.enter_key(sequence)
ensure
  @parent.keymap.callback = old_callback
end

#open_method(method) ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 75

def open_method(method)
  file, line = method.source_location
  @parent.view.find_or_create(file, line)
  Tk::After.idle{ destroy }
end

#send(executable, *args) ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 51

def send(executable, *args)
  method = @parent.method(executable)
  info = <<-INFO
Sequence: #{@full.inspect}
Mapping: #{method}
Arguments: #{args.inspect}
  INFO

  @current = method
  @label.configure text: info
  @label.bind('<1>'){ open_method(method) }
  @full.clear
end

#setup_widgets ⇒ Object 



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# File 'lib/ver/help/describe_key.rb', line 10

def setup_widgets
  @label_frame = Tk::Tile::LabelFrame.new(@parent, text: 'Describe Key')
  desc = <<-DESC
Enter any key combination.
Escape closes the dialog.
Click on result opens the location of the associated method.
  DESC
  @desc = Tk::Tile::Label.new(@label_frame, text: desc).pack
  @label_frame.place relx: 0.5, rely: 0.5, anchor: :center
  @label = Tk::Tile::Label.new(@label_frame, text: 'So far:').pack
  @label.focus

  @parent.keymap.all_bound_sequences.each do |seq|
    @label.bind(seq){|event|
      if event.sequence == '<Key>'
        sequence = event.unicode
        sequence = VER::KEYSYMS.fetch(sequence, sequence)
        sequence = "<#{sequence}>" unless sequence =~ /^([a-zA-Z]|)$/
      else
        sequence = event.sequence
      end

      lookup(sequence) if sequence && !sequence.empty?
      Tk.callback_break
    }
  end

  @label.bind('<Control-q>'){ VER.exit }
  @label.bind('<Escape>'){ destroy }
end