Class: Glimmer::SWT::Custom::Shape

Inherits:
Object
  • Object
show all
Includes:
Packages, Properties
Defined in:
lib/glimmer/swt/custom/shape.rb

Overview

Represents a shape (graphics) to be drawn on a control/widget/canvas/display That is because Shape is drawn on a parent as graphics and doesn’t have an SWT widget for itself

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Properties

#attribute_getter, #attribute_setter, #normalized_attribute, #ruby_attribute_setter

Methods included from Packages

included

Constructor Details

#initialize(parent, keyword, *args, &property_block) ⇒ Shape

Returns a new instance of Shape.



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# File 'lib/glimmer/swt/custom/shape.rb', line 86

def initialize(parent, keyword, *args, &property_block)
  @parent = parent
  @name = keyword
  @method_name = self.class.method_name(keyword, args)
  @options = self.class.arg_options(args, extract: true)
  @args = args
  @properties = {}
  @parent.shapes << self
  post_add_content if property_block.nil?
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/glimmer/swt/custom/shape.rb', line 84

def args
  @args
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/glimmer/swt/custom/shape.rb', line 84

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/glimmer/swt/custom/shape.rb', line 84

def options
  @options
end

#paint_listener_proxy ⇒ Object (readonly)

Returns the value of attribute paint_listener_proxy.



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# File 'lib/glimmer/swt/custom/shape.rb', line 84

def paint_listener_proxy
  @paint_listener_proxy
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/glimmer/swt/custom/shape.rb', line 84

def parent
  @parent
end

Class Method Details

.arg_options(args, extract: false) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 59

def arg_options(args, extract: false)
  arg_options_method = extract ? :pop : :last
  options = args.send(arg_options_method) if args.last.is_a?(Hash)
  options.nil? ? {} : options.symbolize_keys
end

.flyweight_method_names ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 77

def flyweight_method_names
  @flyweight_method_names ||= {}
end

.gc_instance_methods ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 45

def gc_instance_methods
  @gc_instance_methods ||= org.eclipse.swt.graphics.GC.instance_methods.map(&:to_s)
end

.keywords ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 49

def keywords
  @keywords ||= gc_instance_methods.select do |method_name|
    !method_name.end_with?('=') && (method_name.start_with?('draw_') || method_name.start_with?('fill_'))
  end.reject do |method_name|
    gc_instance_methods.include?("#{method_name}=") || gc_instance_methods.include?("set_#{method_name}")
  end.map do |method_name|
    method_name.gsub(/(draw|fill|gradient|round)_/, '')
  end.uniq.compact.to_a
end

.method_name(keyword, args) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 65

def method_name(keyword, args)
  method_arg_options = arg_options(args)
  unless flyweight_method_names.keys.include?([keyword, method_arg_options])
    keyword = keyword.to_s
    gradient = 'gradient_' if method_arg_options[:gradient]
    round = 'round_' if method_arg_options[:round]
    gc_instance_method_name_prefix = !['polyline', 'point', 'image', 'focus'].include?(keyword) && (method_arg_options[:fill] || method_arg_options[:gradient]) ? 'fill_' : 'draw_'
    flyweight_method_names[[keyword, method_arg_options]] = "#{gc_instance_method_name_prefix}#{gradient}#{round}#{keyword}"
  end
  flyweight_method_names[[keyword, method_arg_options]]
end

.valid?(parent, keyword, *args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 41

def valid?(parent, keyword, *args, &block)
  gc_instance_methods.include?(method_name(keyword, args))
end

Instance Method Details

#amend_method_name_options_based_on_properties ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 191

def amend_method_name_options_based_on_properties
  if @properties.keys.map(&:to_s).include?('background') && !@properties.keys.map(&:to_s).include?('foreground')
    @options[:fill] = true
  elsif @properties.keys.map(&:to_s).include?('foreground') && !@properties.keys.map(&:to_s).include?('background')
    @options[:fill] = false
  end
  @method_name = self.class.method_name(@name, @args + [@options])
end

#apply_property_arg_conversions(method_name, property, args) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 119

def apply_property_arg_conversions(method_name, property, args)
  args = args.dup
  the_java_method = org.eclipse.swt.graphics.GC.java_class.declared_instance_methods.detect {|m| m.name == method_name}
  if (args.first.is_a?(Symbol) || args.first.is_a?(String))
    if the_java_method.parameter_types.first == Color.java_class
      args[0] = ColorProxy.new(args[0])
    end
    if the_java_method.parameter_types.first == Java::int.java_class
      args[0] = SWTProxy.constant(args[0])
    end
  end
  if args.first.is_a?(ColorProxy)
    args[0] = args[0].swt_color
  end
  if args.first.is_a?(Hash) && the_java_method.parameter_types.first == Font.java_class
    args[0] = FontProxy.new(args[0])
  end
  if args.first.is_a?(FontProxy)
    args[0] = args[0].swt_font
  end
  if args.first.is_a?(TransformProxy)
    args[0] = args[0].swt_transform
  end
  if ['setBackgroundPattern', 'setForegroundPattern'].include?(method_name.to_s)
    args.each_with_index do |arg, i|
      if arg.is_a?(Symbol) || arg.is_a?(String)
        args[i] = ColorProxy.new(arg).swt_color
      elsif arg.is_a?(ColorProxy)
        args[i] = arg.swt_color
      end
    end
    new_args = [DisplayProxy.instance.swt_display] + args
    args[0] = org.eclipse.swt.graphics.Pattern.new(*new_args)
    args[1..-1] = []
  end
  args
end

#apply_shape_arg_conversions(method_name, args) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 157

def apply_shape_arg_conversions(method_name, args)
  if args.size > 1 && (method_name.include?('polygon') || method_name.include?('polyline'))
    args[0] = args.dup
    args[1..-1] = []
  end
end

#apply_shape_arg_defaults(method_name, args) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 164

def apply_shape_arg_defaults(method_name, args)
  if method_name.include?('round_rectangle') && args.size.between?(4, 5)
    (6 - args.size).times {args << 60}
  elsif method_name.include?('rectangle') && gradient? && args.size == 4
    args << true
  elsif (method_name.include?('text') || method_name.include?('string')) && !@properties.keys.map(&:to_s).include?('background') && args.size == 3
    args << true
  end
  if method_name.include?('image') && args.first.is_a?(String)
    args[0] = ImageProxy.new(args[0])
  end
  if method_name.include?('image') && args.first.is_a?(ImageProxy)
    args[0] = args[0].swt_image
  end
end

#draw? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 97

def draw?
  !fill?
end

#fill? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 101

def fill?
  @options[:fill]
end

#get_attribute(attribute_name) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 212

def get_attribute(attribute_name)
  @properties.symbolize_keys[attribute_name.to_s.to_sym]
end

#gradient? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 105

def gradient?
  @options[:gradient]
end

#has_attribute?(attribute_name, *args) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 200

def has_attribute?(attribute_name, *args)
  self.class.gc_instance_methods.include?(attribute_setter(attribute_name))
end

#paint(paint_event) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 228

def paint(paint_event)
  @properties['background'] = [@parent.background] if fill? && !@properties.keys.map(&:to_s).include?('background')
  @properties['foreground'] = [@parent.foreground] if @parent.respond_to?(:foreground) && draw? && !@properties.keys.map(&:to_s).include?('foreground')
  @properties['font'] = [@parent.font] if @parent.respond_to?(:font) && draw? && !@properties.keys.map(&:to_s).include?('font')
  @properties['transform'] = [nil] if @parent.respond_to?(:transform) && !@properties.keys.map(&:to_s).include?('transform')
  @properties.each do |property, args|
    method_name = attribute_setter(property)
    converted_args = apply_property_arg_conversions(method_name, property, args)
    paint_event.gc.send(method_name, *converted_args)
    if property == 'transform' && args.first.is_a?(TransformProxy)
      args.first.swt_transform.dispose
    end
  end
  apply_shape_arg_conversions(@method_name, @args)
  apply_shape_arg_defaults(@method_name, @args)
  tolerate_shape_extra_args(@method_name, @args)
  paint_event.gc.send(@method_name, *@args)
end

#post_add_content ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 113

def post_add_content
  amend_method_name_options_based_on_properties
  setup_painting
  @content_added = true
end

#round? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/custom/shape.rb', line 109

def round?
  @options[:round]
end

#set_attribute(attribute_name, *args) ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 204

def set_attribute(attribute_name, *args)
  @properties[attribute_name] = args
  if @content_added && !@parent.is_disposed
    @parent.resetup_shape_painting
    @parent.redraw
  end
end

#setup_painting ⇒ Object 



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# File 'lib/glimmer/swt/custom/shape.rb', line 216

def setup_painting
  # TODO consider moving this method to parent (making the logic polymorphic)
  return if @parent.is_disposed
  if parent.respond_to?(:swt_display)
    @paint_listener_proxy = @parent.on_swt_paint(&method(:paint))
  elsif parent.respond_to?(:swt_image)
    paint(parent) # treat parent as paint event since you don't do repaints with images, it's a one time deal.
  elsif parent.respond_to?(:swt_widget)
    @paint_listener_proxy = @parent.on_paint_control(&method(:paint))
  end
end

#tolerate_shape_extra_args(method_name, args) ⇒ Object

Tolerates shape extra args added by user by mistake (e.g. happens when switching from round rectangle to a standard one without removing all extra args)



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# File 'lib/glimmer/swt/custom/shape.rb', line 182

def tolerate_shape_extra_args(method_name, args)
  the_java_method_arg_count = org.eclipse.swt.graphics.GC.java_class.declared_instance_methods.select do |m|
    m.name == method_name.camelcase(:lower)
  end.map(&:parameter_types).map(&:size).max
  if args.size > the_java_method_arg_count
    args[the_java_method_arg_count..-1] = []
  end
end