Module: AttrSetter

Included in:
Swing::Frame, Swing::Label, Swing::List, Swing::Menu, Swing::MenuBar, Swing::MenuItem, Swing::Panel, Swing::ScrollPane, Swing::SplitPane
Defined in:
lib/swing_support/extensions/attr_setter.rb

Overview

Module allows including classes to receive attribute values in an opts Hash and sets those attributes after object initialization

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.dim_proc(default = nil) ⇒ Object 



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# File 'lib/swing_support/extensions/attr_setter.rb', line 8

def self.dim_proc default = nil
  proc do |*args|
    case args.size
      when 2
        Dimension.new *args
      when 1
        case args.first
          when Dimension
            args.first
          when String
            Dimension.new *args.first.split(/x|-|:/, 2)
        end
      when 0
        Dimension.new *default unless default.nil?
    end
  end
end

.included(host) ⇒ Object 



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# File 'lib/swing_support/extensions/attr_setter.rb', line 26

def self.included host
  host.send :extend, ClassMethods
  host.attr_setter :font,
                   :tool_tip_text,
                   :preferred_size => dim_proc,
                   :minimum_size => dim_proc,
                   :maximum_size => dim_proc
end

Instance Method Details

#set_attributes(opts) {|opts| ... } ⇒ Object

Sets attributes after yielding to a given block (usually to call super). Use this method to wrap super call to ORIGINAL J… object, exactly once per each derived view hierarchy. TODO: better way?

Yields:

  • (opts) 


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# File 'lib/swing_support/extensions/attr_setter.rb', line 56

def set_attributes opts
  # Extract known attributes given in opts, to be set after object initialization
  attributes = self.class.attributes.map do |name, default|
    value = opts.delete name
    result = if default.nil? # No default, return whatever value
               value
             elsif default.respond_to? :call # Default is callable, call it with whatever value
               default.call *value
             else # Return either non-nil value or default
               value.nil? ? default : value
             end
    [name, result] unless result.nil?
  end.compact
  yield opts if block_given?
  attributes.each { |(name, value)| send "#{name}=", *value }
end