Class: Clevic::Action

Inherits:
Object show all
Includes:
Gather
Defined in:
lib/clevic/swing/action.rb

Direct Known Subclasses

Separator

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, options = {}, &block) ⇒ Action

Returns a new instance of Action.



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# File 'lib/clevic/swing/action.rb', line 18

def initialize( parent, options = {}, &block )
  @parent = parent
  @enabled = true

  # work around the Swing Stupidity detailed in enabled=
  gather( options, &block )
end

Instance Attribute Details

Returns the value of attribute menu_item.



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# File 'lib/clevic/swing/action.rb', line 25

def menu_item
  @menu_item
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/clevic/swing/action.rb', line 25

def parent
  @parent
end

Instance Method Details

#enabled=(bool) ⇒ Object

Needed to enable / disable accelerators on the fly.



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# File 'lib/clevic/swing/action.rb', line 11

def enabled=( bool )
  # test for @menu_item instead of the method to
  # work around Swing Stupidity. See comments in menu_item.
  menu_item.enabled = bool unless @menu_item.nil?
  @enabled = bool
end

#mnemonic ⇒ Object

find the java.awt.event.KeyEvent::VK constant for the letter after the &. Then set it on the item’s mnemonic. Because JMenuItem.setMnemonic won’t take a nil



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# File 'lib/clevic/swing/action.rb', line 38

def mnemonic
  if @mnemonic.nil?
    ix = text.index '&'
    @mnemonic =
    if ix
      eval( "java.awt.event.KeyEvent::VK_#{text[ix+1..ix+1].upcase}" )
    else
      false
    end
  end
  @mnemonic
end

#object_name ⇒ Object 



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# File 'lib/clevic/swing/action.rb', line 31

def object_name
  name.to_s
end

#parse_shortcut(sequence) ⇒ Object

parse a Qt-style Ctrl+D shortcut specification and return a javax.swing.KeyStroke



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# File 'lib/clevic/swing/action.rb', line 83

def parse_shortcut( sequence )
  # munge keystroke to something getKeyStroke recognises
  # file:///usr/share/doc/java-sdk-docs-1.6.0.10/html/api/javax/swing/KeyStroke.html#getKeyStroke%28java.lang.String%29
  # Yes, the space MUST be last in the charset, otherwise Ctrl-" fails
  modifiers = sequence.split( /[-+ ]/ )
  last = modifiers.pop

  modifier_mask = modifiers.inject(0) do |mask,value|
    mask |
    if value =~ /ctrl/i
      java.awt.Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()
    else
      eval( "java.awt.event.InputEvent::#{value.upcase}_DOWN_MASK" )
    end
  end

  keystroke =
  if last.length == 1
    case last
      # these two seem to break the KeyStroke parsing algorithm
      when "'"
        javax.swing.KeyStroke.getKeyStroke( java.awt.event.KeyEvent::VK_QUOTE, modifier_mask )

      when '"'
        javax.swing.KeyStroke.getKeyStroke( java.awt.event.KeyEvent::VK_QUOTE, modifier_mask | java.awt.event.InputEvent::SHIFT_DOWN_MASK )

      # the conversion in else doesn't work for these
      when '['
        javax.swing.KeyStroke.getKeyStroke( java.awt.event.KeyEvent::VK_OPEN_BRACKET, modifier_mask )

      when ']'
        javax.swing.KeyStroke.getKeyStroke( java.awt.event.KeyEvent::VK_CLOSE_BRACKET, modifier_mask )

      when ';'
        javax.swing.KeyStroke.getKeyStroke( java.awt.event.KeyEvent::VK_SEMICOLON, modifier_mask )

      else
        keystring = javax.swing.KeyStroke.getKeyStroke( java.lang.Character.new( last.to_char ), modifier_mask ).toString
        # have to do this conversion for Mac OS X
        javax.swing.KeyStroke.getKeyStroke( keystring.gsub( /typed/, 'pressed' ) )
    end
  else
    # F keys
    # insert, delete, tab etc
    found = java.awt.event.KeyEvent.constants.grep( /#{last}/i )
    raise "too many options for #{sequence}: #{found.inspect}" if found.size != 1
    javax.swing.KeyStroke.getKeyStroke( eval( "java.awt.event.KeyEvent::#{found.first}" ), modifier_mask )
  end
  keystroke || raise( "unknown keystroke #{sequence} => #{modifiers.inspect} #{last}" )
end

#plain_text ⇒ Object 



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# File 'lib/clevic/swing/action.rb', line 27

def plain_text
  text.gsub( /&/, '' )
end