Class: Glimmer::SWT::WidgetProxy

Inherits:
Object
  • Object
show all
Includes:
Custom::Drawable, Packages, ProxyProperties
Defined in:
lib/glimmer/swt/widget_proxy.rb

Overview

Proxy for SWT Widget objects

Sets default SWT styles to widgets upon inititalizing as per DEFAULT_STYLES

Also, auto-initializes widgets as per initializer blocks in DEFAULT_INITIALIZERS (e.g. setting Composite default layout)

Follows the Proxy Design Pattern

Constant Summary collapse

DEFAULT_STYLES = 
{
  'arrow'               => [:arrow],
  'button'              => [:push],
  'canvas'              => ([:double_buffered] unless OS.mac?),
  'checkbox'            => [:check],
  'check'               => [:check],
  'drag_source'         => [:drop_copy],
  'drop_target'         => [:drop_copy],
  'expand_bar'          => [:v_scroll],
  'list'                => [:border, :v_scroll],
  'menu_item'           => [:push],
  'radio'               => [:radio],
  'scrolled_composite'  => [:border, :h_scroll, :v_scroll],
  'spinner'             => [:border],
  'styled_text'         => [:border, :multi, :v_scroll, :h_scroll],
  'table'               => [:virtual, :border, :full_selection],
  'text'                => [:border],
  'toggle'              => [:toggle],
  'tool_bar'            => [:push],
  'tool_item'           => [:push],
  'tree'                => [:virtual, :border, :h_scroll, :v_scroll],
  'date_drop_down'      => [:date, :drop_down],
  'time'                => [:time],
  'calendar'            => [:calendar],
}
DEFAULT_INITIALIZERS = 
{
  composite: lambda do |composite|
    composite.layout = GridLayout.new if composite.get_layout.nil?
  end,
  canvas: lambda do |canvas|
    canvas.layout = nil if canvas.respond_to?('layout=') && !canvas.get_layout.nil?
  end,
  scrolled_composite: lambda do |scrolled_composite|
    scrolled_composite.expand_horizontal = true
    scrolled_composite.expand_vertical = true
  end,
  table: lambda do |table|
    table.setHeaderVisible(true)
    table.setLinesVisible(true)
  end,
  table_column: lambda do |table_column|
    table_column.setWidth(80)
  end,
  group: lambda do |group|
    group.layout = GridLayout.new if group.get_layout.nil?
  end,
}
KEYWORD_ALIASES = 
{
  'arrow'          => 'button',
  'checkbox'       => 'button',
  'check'          => 'button',
  'radio'          => 'button',
  'toggle'         => 'button',
  'date'           => 'date_time',
  'date_drop_down' => 'date_time',
  'time'           => 'date_time',
  'calendar'       => 'date_time',
}

Instance Attribute Summary collapse

Attributes included from Custom::Drawable

#image_double_buffered, #requires_shape_disposal

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Custom::Drawable

#add_shape, #clear_shapes, #deregister_shape_painting, #expanded_shapes, #image_buffered_shapes, #paint_pixel_by_pixel, #setup_shape_painting, #shape_at_location, #shapes, #swt_drawable

Methods included from ProxyProperties

#has_attribute_getter?, #has_attribute_setter?

Methods included from Properties

attribute_getter, #attribute_getter, attribute_setter, #attribute_setter, normalized_attribute, #normalized_attribute, ruby_attribute_getter, #ruby_attribute_setter, ruby_attribute_setter

Methods included from Packages

included

Constructor Details

#initialize(*init_args, swt_widget: nil) ⇒ WidgetProxy

Initializes a new SWT Widget

It is preferred to use ‘::create` method instead since it instantiates the right subclass per widget keyword

keyword, parent, swt_widget_args (including styles)

Styles is a comma separate list of symbols representing SWT styles in lower case



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# File 'lib/glimmer/swt/widget_proxy.rb', line 153

def initialize(*init_args, swt_widget: nil)
  auto_exec do
    @image_double_buffered = !!(init_args&.last&.include?(:image_double_buffered) && init_args&.last&.delete(:image_double_buffered))
    if swt_widget.nil?
      underscored_widget_name, parent, args = init_args
      @parent_proxy = parent
      styles, extra_options = extract_args(underscored_widget_name, args)
      swt_widget_class = self.class.swt_widget_class_for(underscored_widget_name)
      @swt_widget = swt_widget_class.new(@parent_proxy.swt_widget, style(underscored_widget_name, styles), *extra_options)
    else
      @swt_widget = swt_widget
      underscored_widget_name = self.class.underscored_widget_name(@swt_widget)
      parent_proxy_class = self.class.widget_proxy_class(self.class.underscored_widget_name(@swt_widget.parent))
      parent = swt_widget.parent
      @parent_proxy = parent&.get_data('proxy') || parent_proxy_class.new(swt_widget: parent)
    end
    if @swt_widget&.get_data('proxy').nil?
      @swt_widget.set_data('proxy', self)
      DEFAULT_INITIALIZERS[underscored_widget_name.to_s.to_sym]&.call(@swt_widget)
      @parent_proxy.post_initialize_child(self)
    end
    @keyword = underscored_widget_name.to_s
    if respond_to?(:on_widget_disposed)
      on_widget_disposed {
        clear_shapes
        deregister_shape_painting
      }
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 719

def method_missing(method, *args, &block)
  # TODO push most of this logic down to Properties (and perhaps create Listeners module as well)
  if can_handle_observation_request?(method)
    handle_observation_request(method, &block)
  else
    super
  end
end

Instance Attribute Details

#drag_source_proxy ⇒ Object (readonly)

Returns the value of attribute drag_source_proxy.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def drag_source_proxy
  @drag_source_proxy
end

#drag_source_style ⇒ Object

Returns the value of attribute drag_source_style.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def drag_source_style
  @drag_source_style
end

#drag_source_transfer ⇒ Object

Returns the value of attribute drag_source_transfer.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def drag_source_transfer
  @drag_source_transfer
end

#drop_target_proxy ⇒ Object (readonly)

Returns the value of attribute drop_target_proxy.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def drop_target_proxy
  @drop_target_proxy
end

#drop_target_transfer ⇒ Object

Returns the value of attribute drop_target_transfer.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def drop_target_transfer
  @drop_target_transfer
end

#finished_add_content ⇒ Object (readonly) Also known as: finished_add_content?

Returns the value of attribute finished_add_content.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def finished_add_content
  @finished_add_content
end

#parent_proxy ⇒ Object (readonly)

Returns the value of attribute parent_proxy.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def parent_proxy
  @parent_proxy
end

#swt_widget ⇒ Object (readonly)

Returns the value of attribute swt_widget.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 142

def swt_widget
  @swt_widget
end

Class Method Details

.create(*init_args, swt_widget: nil) ⇒ Object

Instantiates the right WidgetProxy subclass for passed in keyword Args are: keyword, parent, swt_widget_args (including styles)



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# File 'lib/glimmer/swt/widget_proxy.rb', line 114

def create(*init_args, swt_widget: nil)
  DisplayProxy.instance.auto_exec do
    return swt_widget.get_data('proxy') if swt_widget&.get_data('proxy')
    keyword, parent, args = init_args
    selected_widget_proxy_class = widget_proxy_class(keyword || underscored_widget_name(swt_widget))
    if init_args.empty?
      selected_widget_proxy_class.new(swt_widget: swt_widget)
    else
      selected_widget_proxy_class.new(*init_args)
    end
  end
end

.flyweight_swt_widget_classes ⇒ Object

Flyweight Design Pattern memoization cache. Can be cleared if memory is needed.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 572

def self.flyweight_swt_widget_classes
  @flyweight_swt_widget_classes ||= {}
end

.swt_widget_class_for(underscored_widget_name) ⇒ Object

This supports widgets in and out of basic SWT



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# File 'lib/glimmer/swt/widget_proxy.rb', line 542

def self.swt_widget_class_for(underscored_widget_name)
  # TODO clear memoization for a keyword if a custom widget was defined with that keyword
  unless flyweight_swt_widget_classes.keys.include?(underscored_widget_name)
    begin
      underscored_widget_name = KEYWORD_ALIASES[underscored_widget_name] if KEYWORD_ALIASES[underscored_widget_name]
      swt_widget_name = underscored_widget_name.camelcase(:upper)
      swt_widget_class = eval(swt_widget_name)
      # TODO fix issue with not detecting DateTime because it's conflicting with the Ruby DateTime
      unless swt_widget_class.ancestors.include?(org.eclipse.swt.widgets.Widget)
        swt_widget_class = swt_widget_class_manual_entries[underscored_widget_name]
        if swt_widget_class.nil?
          Glimmer::Config.logger.debug {"Class #{swt_widget_class} matching #{underscored_widget_name} is not a subclass of org.eclipse.swt.widgets.Widget"}
          return nil
        end
      end
      flyweight_swt_widget_classes[underscored_widget_name] = swt_widget_class
    rescue SyntaxError, NameError => e
      Glimmer::Config.logger.debug {e.full_message}
      # Glimmer::Config.logger.debug {"#{e.message}\n#{e.backtrace.join("\n")}"}
      nil
    rescue => e
      Glimmer::Config.logger.debug {e.full_message}
      # Glimmer::Config.logger.debug {"#{e.message}\n#{e.backtrace.join("\n")}"}
      nil
    end
  end
  flyweight_swt_widget_classes[underscored_widget_name]
end

.swt_widget_class_manual_entries ⇒ Object

Manual entries of SWT widget classes that conflict with Ruby classes



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# File 'lib/glimmer/swt/widget_proxy.rb', line 535

def self.swt_widget_class_manual_entries
  {
    'date_time' => Java::OrgEclipseSwtWidgets::DateTime
  }
end

.underscored_widget_name(swt_widget) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 137

def underscored_widget_name(swt_widget)
  swt_widget.class.name.split(/::|\./).last.underscore
end

.widget_exists?(underscored_widget_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 530

def self.widget_exists?(underscored_widget_name)
  !!swt_widget_class_for(underscored_widget_name)
end

.widget_proxy_class(keyword) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 127

def widget_proxy_class(keyword)
  begin
    keyword = KEYWORD_ALIASES[keyword] if KEYWORD_ALIASES[keyword]
    class_name = "#{keyword.camelcase(:upper)}Proxy".to_sym
    Glimmer::SWT.const_get(class_name)
  rescue
    Glimmer::SWT::WidgetProxy
  end
end

Instance Method Details

#add_observer(observer, property_name) ⇒ Object

Used for data-binding only. Consider renaming or improving to avoid the confusion it causes



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# File 'lib/glimmer/swt/widget_proxy.rb', line 622

def add_observer(observer, property_name)
  if !observer.respond_to?(:binding_options) || !observer.binding_options[:read_only]
    auto_exec do
      property_listener_installers = @swt_widget.class.ancestors.map {|ancestor| widget_property_listener_installers[ancestor]}.compact
      widget_listener_installers = property_listener_installers.map{|installer| installer[property_name.to_s.to_sym]}.compact if !property_listener_installers.empty?
      widget_listener_installers.to_a.first&.call(observer)
    end
  end
end

#async_exec(&block) ⇒ Object

delegates to DisplayProxy



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# File 'lib/glimmer/swt/widget_proxy.rb', line 577

def async_exec(&block)
  DisplayProxy.instance.async_exec(&block)
end

#auto_exec(override_sync_exec: nil, override_async_exec: nil, &block) ⇒ Object

delegates to DisplayProxy



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# File 'lib/glimmer/swt/widget_proxy.rb', line 592

def auto_exec(override_sync_exec: nil, override_async_exec: nil, &block)
  DisplayProxy.instance.auto_exec(override_sync_exec: override_sync_exec, override_async_exec: override_async_exec, &block)
end

#can_add_observer?(property_name) ⇒ Boolean

TODO Consider renaming these methods as they are mainly used for data-binding

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 615

def can_add_observer?(property_name)
  auto_exec do
    @swt_widget.class.ancestors.map {|ancestor| widget_property_listener_installers[ancestor]}.compact.map(&:keys).flatten.map(&:to_s).include?(property_name.to_s)
  end
end

#can_handle_drag_observation_request?(observation_request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 664

def can_handle_drag_observation_request?(observation_request)
  auto_exec do
    return false unless swt_widget.is_a?(Control)
    potential_drag_source = @drag_source_proxy.nil?
    ensure_drag_source_proxy
    @drag_source_proxy.can_handle_observation_request?(observation_request).tap do |result|
      if potential_drag_source && !result
        @drag_source_proxy.swt_widget.dispose
        @drag_source_proxy = nil
      end
    end
  end
rescue => e
  Glimmer::Config.logger.debug {e.full_message}
  false
end

#can_handle_drop_observation_request?(observation_request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 681

def can_handle_drop_observation_request?(observation_request)
  auto_exec do
    return false unless swt_widget.is_a?(Control)
    potential_drop_target = @drop_target_proxy.nil?
    ensure_drop_target_proxy
    @drop_target_proxy.can_handle_observation_request?(observation_request).tap do |result|
      if potential_drop_target && !result
        @drop_target_proxy.swt_widget.dispose
        @drop_target_proxy = nil
      end
    end
  end
end

#can_handle_observation_request?(observation_request) ⇒ Boolean

TODO eliminate duplication in the following methods perhaps by relying on exceptions

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 653

def can_handle_observation_request?(observation_request)
  observation_request = normalize_observation_request(observation_request)
  if observation_request.start_with?('on_swt_')
    constant_name = observation_request.sub(/^on_swt_/, '')
    SWTProxy.has_constant?(constant_name)
  elsif observation_request.start_with?('on_')
    event = observation_request.sub(/^on_/, '')
    can_add_listener?(event) || can_handle_drag_observation_request?(observation_request) || can_handle_drop_observation_request?(observation_request)
  end
end

#content(&block) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 713

def content(&block)
  auto_exec do
    Glimmer::DSL::Engine.add_content(self, Glimmer::DSL::SWT::WidgetExpression.new, @keyword, &block)
  end
end

#dispose ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 603

def dispose
  auto_exec do
    @swt_widget.dispose
  end
end

#disposed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 609

def disposed?
  @swt_widget.isDisposed
end

#ensure_drag_source_proxy(style = []) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 636

def ensure_drag_source_proxy(style=[])
  @drag_source_proxy ||= self.class.new('drag_source', self, style).tap do |proxy|
    proxy.set_attribute(:transfer, :text)
  end
end

#ensure_drop_target_proxy(style = []) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 642

def ensure_drop_target_proxy(style=[])
  @drop_target_proxy ||= WidgetProxy.new('drop_target', self, style).tap do |proxy|
    proxy.set_attribute(:transfer, :text)
    proxy.on_drag_enter { |event|
      event.detail = DNDProxy[:drop_copy]
    }
  end
end

#extract_args(underscored_widget_name, args) ⇒ Object 



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

def extract_args(underscored_widget_name, args)
  @arg_extractor_mapping ||= {
    'menu_item' => lambda do |args|
      index = args.delete(args.last) if args.last.is_a?(Numeric)
      extra_options = [index].compact
      styles = args
      [styles, extra_options]
    end,
  }
  if @arg_extractor_mapping[underscored_widget_name]
    @arg_extractor_mapping[underscored_widget_name].call(args)
  else
    extra_options = []
    style_args = args.select {|arg| arg.is_a?(Symbol) || arg.is_a?(String)}
    if style_args.any?
      style_arg_start_index = args.index(style_args.first)
      style_arg_last_index = args.index(style_args.last)
      extra_options = args[style_arg_last_index+1..-1]
      args = args[style_arg_start_index..style_arg_last_index]
    elsif args.first.is_a?(Integer)
      extra_options = args[1..-1]
      args = args[0..0]
    end
    [args, extra_options]
  end
end

#finish_add_content! ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 196

def finish_add_content!
  @finished_add_content = true
end

#get_attribute(attribute_name) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 261

def get_attribute(attribute_name)
  widget_custom_attribute = widget_custom_attribute_mapping[attribute_name.to_s]
  swt_widget_operation = false
  result = nil
  auto_exec do
    result = if widget_custom_attribute
      swt_widget_operation = true
      if widget_custom_attribute[:getter][:invoker]
        widget_custom_attribute[:getter][:invoker].call(@swt_widget, [])
      else
        @swt_widget.send(widget_custom_attribute[:getter][:name])
      end
    end
  end
  result = super unless swt_widget_operation
  result
end

#handle_observation_request(observation_request, &block) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 695

def handle_observation_request(observation_request, &block)
  observation_request = normalize_observation_request(observation_request)
  if observation_request.start_with?('on_swt_')
    constant_name = observation_request.sub(/^on_swt_/, '')
    add_swt_event_listener(constant_name, &block)
  elsif observation_request.start_with?('on_')
    event = observation_request.sub(/^on_/, '')
    if can_add_listener?(event)
      event = observation_request.sub(/^on_/, '')
      add_listener(event, &block)
    elsif can_handle_drag_observation_request?(observation_request)
      @drag_source_proxy&.handle_observation_request(observation_request, &block)
    elsif can_handle_drop_observation_request?(observation_request)
      @drop_target_proxy&.handle_observation_request(observation_request, &block)
    end
  end
end

#has_attribute?(attribute_name, *args) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 231

def has_attribute?(attribute_name, *args)
  # TODO test that attribute getter responds too
  widget_custom_attribute = widget_custom_attribute_mapping[attribute_name.to_s]
  auto_exec do
    if widget_custom_attribute
      @swt_widget.respond_to?(widget_custom_attribute[:setter][:name])
    else
      super
    end
  end
end

#has_style?(style) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 596

def has_style?(style)
  comparison = interpret_style(style)
  auto_exec do
    (@swt_widget.style & comparison) == comparison
  end
end

#height ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 307

def height
  bounds.height
end

#pack_same_size ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 279

def pack_same_size
  auto_exec do
    bounds = @swt_widget.getBounds
    listener = on_control_resized {
      @swt_widget.setSize(bounds.width, bounds.height)
      @swt_widget.setLocation(bounds.x, bounds.y)
    }
    if @swt_widget.is_a?(Composite)
      @swt_widget.layout(true, true)
    else
      @swt_widget.pack(true)
    end
    @swt_widget.removeControlListener(listener.swt_listener)
  end
end

#post_add_content ⇒ Object

Subclasses may override to perform post add_content work. Make sure its logic detects if it ran before since it could run multiple times when adding content multiple times post creation.



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# File 'lib/glimmer/swt/widget_proxy.rb', line 192

def post_add_content
  # No Op by default
end

#post_initialize_child(child) ⇒ Object

Subclasses may override to perform post initialization work on an added child



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# File 'lib/glimmer/swt/widget_proxy.rb', line 185

def post_initialize_child(child)
  # No Op by default
end

#proxy_source_object ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 227

def proxy_source_object
  @swt_widget
end

#remove_observer(observer, property_name) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 632

def remove_observer(observer, property_name)
  # TODO consider implementing if remove_observer is needed (consumers can remove listener via SWT API)
end

#respond_to?(method, *args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/widget_proxy.rb', line 728

def respond_to?(method, *args, &block)
  result = super
  return true if result
  auto_exec do
    can_handle_observation_request?(method)
  end
end

#set_attribute(attribute_name, *args) ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 243

def set_attribute(attribute_name, *args)
  # TODO Think about widget subclasses overriding set_attribute to add more attributes vs adding as Ruby attributes directly
  widget_custom_attribute = widget_custom_attribute_mapping[attribute_name.to_s]
  auto_exec do
    apply_property_type_converters(normalized_attribute(attribute_name), args)
  end
  swt_widget_operation = false
  result = nil
  auto_exec do
    result = if widget_custom_attribute
      swt_widget_operation = true
      widget_custom_attribute[:setter][:invoker].call(@swt_widget, args)
    end
  end
  result = super unless swt_widget_operation
  result
end

#sync_exec(&block) ⇒ Object

delegates to DisplayProxy



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# File 'lib/glimmer/swt/widget_proxy.rb', line 582

def sync_exec(&block)
  DisplayProxy.instance.sync_exec(&block)
end

#timer_exec(delay_in_millis, &block) ⇒ Object

delegates to DisplayProxy



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# File 'lib/glimmer/swt/widget_proxy.rb', line 587

def timer_exec(delay_in_millis, &block)
  DisplayProxy.instance.timer_exec(delay_in_millis, &block)
end

#widget_property_listener_installers ⇒ Object

these work in tandem with the property_type_converters sometimes, they are specified in subclasses instead



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# File 'lib/glimmer/swt/widget_proxy.rb', line 313

def widget_property_listener_installers
  @swt_widget_property_listener_installers ||= {
    Java::OrgEclipseSwtWidgets::Control => {
      :focus => lambda do |observer|
        on_focus_gained { |focus_event|
          observer.call(true)
        }
        on_focus_lost { |focus_event|
          observer.call(false)
        }
      end,
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          observer.call(@swt_widget.getSelection)
        } if can_handle_observation_request?(:on_widget_selected)
      end,
      :text => lambda do |observer|
        on_modify_text { |modify_event|
          observer.call(@swt_widget.getText)
        } if can_handle_observation_request?(:on_modify_text)
      end,
    },
    Java::OrgEclipseSwtWidgets::Combo => {
      :text => lambda do |observer|
        on_modify_text { |modify_event|
          observer.call(@swt_widget.getText)
        }
      end,
    },
    Java::OrgEclipseSwtWidgets::Table => {
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          if has_style?(:multi)
            observer.call(@swt_widget.getSelection.map(&:get_data))
          else
            observer.call(@swt_widget.getSelection.first&.get_data)
          end
        }
      end,
    },
    Java::OrgEclipseSwtWidgets::Tree => {
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          if has_style?(:multi)
            observer.call(@swt_widget.getSelection.map(&:get_data))
          else
            observer.call(@swt_widget.getSelection.first&.get_data)
          end
        }
      end,
    },
    Java::OrgEclipseSwtWidgets::Text => {
      :text => lambda do |observer|
        on_modify_text { |modify_event|
          observer.call(@swt_widget.getText)
        }
      end,
      :caret_position => lambda do |observer|
        on_swt_keydown { |event|
          observer.call(@swt_widget.getCaretPosition)
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getCaretPosition)
        }
        on_swt_mousedown { |event|
          observer.call(@swt_widget.getCaretPosition)
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getCaretPosition)
        }
      end,
      :selection => lambda do |observer|
        on_swt_keydown { |event|
          observer.call(@swt_widget.getSelection)
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelection)
        }
        on_swt_mousedown { |event|
          observer.call(@swt_widget.getSelection)
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelection)
        }
      end,
      :selection_count => lambda do |observer|
        on_swt_keydown { |event|
          observer.call(@swt_widget.getSelectionCount)
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelectionCount)
        }
        on_swt_mousedown { |event|
          observer.call(@swt_widget.getSelectionCount)
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelectionCount)
        }
      end,
      :top_index => lambda do |observer|
        @last_top_index = @swt_widget.getTopIndex
        on_paint_control { |event|
          if @swt_widget.getTopIndex != @last_top_index
            @last_top_index = @swt_widget.getTopIndex
            observer.call(@last_top_index)
          end
        }
      end,
    },
    Java::OrgEclipseSwtCustom::StyledText => {
      :text => lambda do |observer|
        on_modify_text { |modify_event|
          observer.call(@swt_widget.getText)
        }
      end,
      :caret_position => lambda do |observer|
        on_caret_moved { |event|
          observer.call(@swt_widget.getSelection.x) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelection.x) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelection.x) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
      end,
      :caret_offset => lambda do |observer|
        on_caret_moved { |event|
          observer.call(@swt_widget.getCaretOffset) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
      end,
      :selection => lambda do |observer|
        on_widget_selected { |event|
          observer.call(@swt_widget.getSelection) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelection) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelection) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
      end,
      :selection_count => lambda do |observer|
        on_widget_selected { |event|
          observer.call(@swt_widget.getSelectionCount) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelectionCount) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelectionCount) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
      end,
      :selection_range => lambda do |observer|
        on_widget_selected { |event|
          observer.call(@swt_widget.getSelectionRange) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_keyup { |event|
          observer.call(@swt_widget.getSelectionRange) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
        on_swt_mouseup { |event|
          observer.call(@swt_widget.getSelectionRange) unless @swt_widget.getCaretOffset == 0 && @last_modify_text != text
        }
      end,
      :top_index => lambda do |observer|
        @last_top_index = @swt_widget.getTopIndex
        on_paint_control { |event|
          if @swt_widget.getTopIndex != @last_top_index
            @last_top_index = @swt_widget.getTopIndex
            observer.call(@last_top_index)
          end
        }
      end,
      :top_pixel => lambda do |observer|
        @last_top_pixel = @swt_widget.getTopPixel
        on_paint_control { |event|
          if @swt_widget.getTopPixel != @last_top_pixel
            @last_top_pixel = @swt_widget.getTopPixel
            observer.call(@last_top_pixel)
          end
        }
      end,
    },
    Java::OrgEclipseSwtWidgets::Button => {
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          observer.call(@swt_widget.getSelection)
        }
      end
    },
    Java::OrgEclipseSwtWidgets::MenuItem => {
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          observer.call(@swt_widget.getSelection)
        }
      end
    },
    Java::OrgEclipseSwtWidgets::Spinner => {
      :selection => lambda do |observer|
        on_widget_selected { |selection_event|
          observer.call(@swt_widget.getSelection)
        }
      end
    },
    Java::OrgEclipseSwtWidgets::DateTime =>
      [:year, :month, :day, :hours, :minutes, :seconds, :date_time, :date, :time].reduce({}) do |hash, attribute|
        hash.merge(
          attribute => lambda do |observer|
            on_widget_selected { |selection_event|
              observer.call(get_attribute(attribute))
            }
          end
        )
      end,
  }
end

#width ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 303

def width
  bounds.width
end

#x ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 295

def x
  bounds.x
end

#y ⇒ Object 



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# File 'lib/glimmer/swt/widget_proxy.rb', line 299

def y
  bounds.y
end