Class: Glimmer::SWT::WidgetProxy

Inherits:
Object
  • Object
show all
Includes:
Custom::Drawable, Packages, Properties
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],
  '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

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Custom::Drawable

#clear_shapes, #resetup_shape_painting, #shapes

Methods included from Properties

#attribute_getter, #attribute_setter, #normalized_attribute, #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



150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 150

def initialize(*init_args, swt_widget: nil)
  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
    }
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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



663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 663

def method_missing(method, *args, &block)
  if can_handle_observation_request?(method)
    handle_observation_request(method, &block)
  elsif has_attribute_setter?(method, *args)
    set_attribute(method, *args)
  elsif has_attribute_getter?(method, *args)
    get_attribute(method, *args)
  else
    swt_widget.send(method, *args, &block)
  end
rescue => e
  Glimmer::Config.logger.debug { "Neither WidgetProxy nor #{swt_widget.class.name} can handle the method ##{method}" }
  Glimmer::Config.logger.debug { e.full_message }
  super
  # TODO consider get_attribute too
end

Instance Attribute Details

#drag_source_proxy ⇒ Object (readonly)

Returns the value of attribute drag_source_proxy.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def drag_source_proxy
  @drag_source_proxy
end

#drag_source_style ⇒ Object

Returns the value of attribute drag_source_style.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def drag_source_style
  @drag_source_style
end

#drag_source_transfer ⇒ Object

Returns the value of attribute drag_source_transfer.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def drag_source_transfer
  @drag_source_transfer
end

#drop_target_proxy ⇒ Object (readonly)

Returns the value of attribute drop_target_proxy.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def drop_target_proxy
  @drop_target_proxy
end

#drop_target_transfer ⇒ Object

Returns the value of attribute drop_target_transfer.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def drop_target_transfer
  @drop_target_transfer
end

#parent_proxy ⇒ Object (readonly)

Returns the value of attribute parent_proxy.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

def parent_proxy
  @parent_proxy
end

#swt_widget ⇒ Object (readonly)

Returns the value of attribute swt_widget.



140
141
142
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 140

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)



114
115
116
117
118
119
120
121
122
123
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 114

def create(*init_args, swt_widget: nil)
  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

.flyweight_swt_widget_classes ⇒ Object

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



538
539
540
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 538

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



508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 508

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



501
502
503
504
505
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 501

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

.underscored_widget_name(swt_widget) ⇒ Object 



135
136
137
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 135

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

.widget_exists?(underscored_widget_name) ⇒ Boolean 



496
497
498
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 496

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

.widget_proxy_class(keyword) ⇒ Object 



125
126
127
128
129
130
131
132
133
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 125

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



574
575
576
577
578
579
580
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 574

def add_observer(observer, property_name)
  if !observer.respond_to?(:binding_options) || !observer.binding_options[:read_only]
    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

#async_exec(&block) ⇒ Object 



542
543
544
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 542

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

#can_add_observer?(property_name) ⇒ Boolean

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



569
570
571
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 569

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

#can_handle_drag_observation_request?(observation_request) ⇒ Boolean 



614
615
616
617
618
619
620
621
622
623
624
625
626
627
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 614

def can_handle_drag_observation_request?(observation_request)
  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
rescue => e
  Glimmer::Config.logger.debug {e.full_message}
  false
end

#can_handle_drop_observation_request?(observation_request) ⇒ Boolean 



629
630
631
632
633
634
635
636
637
638
639
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 629

def can_handle_drop_observation_request?(observation_request)
  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

#can_handle_observation_request?(observation_request) ⇒ Boolean

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



603
604
605
606
607
608
609
610
611
612
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 603

def can_handle_observation_request?(observation_request)
  observation_request = observation_request.to_s
  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 



659
660
661
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 659

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

#dispose ⇒ Object 



559
560
561
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 559

def dispose
  @swt_widget.dispose
end

#disposed? ⇒ Boolean 



563
564
565
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 563

def disposed?
  @swt_widget.isDisposed
end

#ensure_drag_source_proxy(style = []) ⇒ Object 



586
587
588
589
590
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 586

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 



592
593
594
595
596
597
598
599
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 592

def ensure_drop_target_proxy(style=[])
  @drop_target_proxy ||= self.class.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 



189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 189

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

#get_attribute(attribute_name) ⇒ Object 



255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 255

def get_attribute(attribute_name)
  widget_custom_attribute = widget_custom_attribute_mapping[attribute_name.to_s]
  if widget_custom_attribute
    if widget_custom_attribute[:getter][:invoker]
      widget_custom_attribute[:getter][:invoker].call(@swt_widget, [])
    else
      @swt_widget.send(widget_custom_attribute[:getter][:name])
    end
  elsif @swt_widget.respond_to?(attribute_getter(attribute_name))
    @swt_widget.send(attribute_getter(attribute_name))
  elsif @swt_widget.respond_to?(ruby_attribute_getter(attribute_name))
    @swt_widget.send(ruby_attribute_getter(attribute_name))
  elsif @swt_widget.respond_to?(attribute_name)
    @swt_widget.send(attribute_name)
  elsif respond_to?(ruby_attribute_getter(attribute_name))
    send(ruby_attribute_getter(attribute_name))
  else
    send(attribute_name)
  end
end

#handle_observation_request(observation_request, &block) ⇒ Object 



641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 641

def handle_observation_request(observation_request, &block)
  observation_request = observation_request.to_s
  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 



230
231
232
233
234
235
236
237
238
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 230

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

#has_attribute_getter?(attribute_getter_name, *args) ⇒ Boolean 



216
217
218
219
220
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 216

def has_attribute_getter?(attribute_getter_name, *args)
  attribute_getter_name = attribute_getter_name.to_s.underscore
  return false unless !attribute_getter_name.end_with?('=') && !attribute_getter_name.start_with?('set_')
  args.empty? && swt_widget.respond_to?(attribute_getter_name)
end

#has_attribute_setter?(attribute_setter_name, *args) ⇒ Boolean 



222
223
224
225
226
227
228
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 222

def has_attribute_setter?(attribute_setter_name, *args)
  attribute_setter_name = attribute_setter_name.to_s
  underscored_attribute_setter_name = attribute_setter_name.underscore
  return false unless attribute_setter_name.end_with?('=') || (attribute_setter_name.start_with?('set_') && !args.empty?)
  attribute_name = underscored_attribute_setter_name.sub(/^set_/, '').sub(/=$/, '')
  has_attribute?(attribute_name, *args)
end

#has_style?(style) ⇒ Boolean 



554
555
556
557
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 554

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

#pack_same_size ⇒ Object 



276
277
278
279
280
281
282
283
284
285
286
287
288
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 276

def pack_same_size
  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

#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.



185
186
187
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 185

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



178
179
180
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 178

def post_initialize_child(child)
  # No Op by default
end

#remove_observer(observer, property_name) ⇒ Object 



582
583
584
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 582

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 



680
681
682
683
684
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 680

def respond_to?(method, *args, &block)
  super ||
    can_handle_observation_request?(method) ||
    swt_widget.respond_to?(method, *args, &block)
end

#set_attribute(attribute_name, *args) ⇒ Object 



240
241
242
243
244
245
246
247
248
249
250
251
252
253
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 240

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]
  apply_property_type_converters(normalized_attribute(attribute_name), args)
  if widget_custom_attribute
    widget_custom_attribute[:setter][:invoker].call(@swt_widget, args)
  elsif @swt_widget.respond_to?(attribute_setter(attribute_name))
    @swt_widget.send(attribute_setter(attribute_name), *args) unless @swt_widget.send(attribute_getter(attribute_name)) == args.first
  elsif @swt_widget.respond_to?(ruby_attribute_setter(attribute_name))
    @swt_widget.send(ruby_attribute_setter(attribute_name), args)
  else
    send(ruby_attribute_setter(attribute_name), args)
  end
end

#sync_exec(&block) ⇒ Object 



546
547
548
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 546

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

#timer_exec(delay_in_millis, &block) ⇒ Object 



550
551
552
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 550

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

#widget_property_listener_installers ⇒ Object 



290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
 
# File 'lib/glimmer/swt/widget_proxy.rb', line 290

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::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