Class: Glimmer::SWT::MenuProxy

Inherits:
WidgetProxy show all
Defined in:
lib/glimmer/swt/menu_proxy.rb

Overview

Proxy for org.eclipse.swt.widgets.Menu

Functions differently from other widget proxies.

Glimmer automatically detects if this is a drop down menu or pop up menu from its parent if no SWT style is passed in.

There are 3 possibilities:

  • SWT :bar style is passed in: Menu Bar

  • Parent is ShellProxy: Pop Up Menu (having style :pop_up)

  • Parent is another Menu: Drop Down Menu (having style :drop_down)

In order to get the SWT Menu object, one must call ‘#swt_widget`.

In the case of a Drop Down menu, this automatically creates an SWT MenuItem object with style :cascade

In order to retrieve the menu item widget proxy, one must call ‘#menu_item_proxy`

Follows the Proxy Design Pattern

Constant Summary

Constants inherited from WidgetProxy

WidgetProxy::DEFAULT_INITIALIZERS, WidgetProxy::DEFAULT_STYLES, WidgetProxy::KEYWORD_ALIASES

Instance Attribute Summary collapse

Attributes inherited from WidgetProxy

#drag_source_proxy, #drag_source_style, #drag_source_transfer, #drop_target_proxy, #drop_target_transfer, #parent_proxy, #swt_widget

Instance Method Summary collapse

Methods inherited from WidgetProxy

#add_observer, #async_exec, #can_add_observer?, #can_handle_drag_observation_request?, #can_handle_drop_observation_request?, #content, create, #dispose, #ensure_drag_source_proxy, #ensure_drop_target_proxy, #extract_args, #has_style?, #method_missing, #pack_same_size, #post_add_content, #post_initialize_child, #remove_observer, #respond_to?, swt_widget_class_for, #sync_exec, underscored_widget_name, widget_exists?, #widget_property_listener_installers, widget_proxy_class

Methods included from Packages

included

Constructor Details

#initialize(parent, args) ⇒ MenuProxy

Returns a new instance of MenuProxy.



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# File 'lib/glimmer/swt/menu_proxy.rb', line 51

def initialize(parent, args)
  index = args.delete(args.last) if args.last.is_a?(Numeric)
  styles = args.map(&:to_sym)
  if !styles.include?(:bar) && !parent.swt_widget.is_a?(Menu)
    styles = styles.unshift(:pop_up)
  end

  swt_widget_class = self.class.swt_widget_class_for('menu')
  if parent.swt_widget.is_a?(Menu)
    @menu_item_proxy = SWT::WidgetProxy.new('menu_item', parent, [:cascade] + [index].compact)
    @swt_menu_item = @menu_item_proxy.swt_widget
    @swt_widget = swt_widget_class.new(@menu_item_proxy.swt_widget)
    @swt_menu_item.setMenu(swt_widget)
  elsif parent.swt_widget.is_a?(Shell)
    @swt_widget = swt_widget_class.new(parent.swt_widget, style('menu', styles))
  else
    @swt_widget = swt_widget_class.new(parent.swt_widget)
  end
  DEFAULT_INITIALIZERS['menu']&.call(swt_widget)

  if styles.include?(:bar)
    parent.swt_widget.setMenuBar(swt_widget)
  elsif styles.include?(:pop_up)
    parent.swt_widget.setMenu(swt_widget)
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Glimmer::SWT::WidgetProxy

Instance Attribute Details

Returns the value of attribute menu_item_proxy.



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

def menu_item_proxy
  @menu_item_proxy
end

#menu_parent ⇒ Object (readonly)

Returns the value of attribute menu_parent.



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

def menu_parent
  @menu_parent
end

#swt_menu_item ⇒ Object (readonly)

Returns the value of attribute swt_menu_item.



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

def swt_menu_item
  @swt_menu_item
end

Instance Method Details

#can_handle_observation_request?(observation_request, super_only: false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/menu_proxy.rb', line 104

def can_handle_observation_request?(observation_request, super_only: false)
  super_result = super(observation_request)
  if observation_request.start_with?('on_') && !super_result && !super_only
    return menu_item_proxy.can_handle_observation_request?(observation_request)
  else
    super_result
  end
end

#get_attribute(attribute_name) ⇒ Object 



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# File 'lib/glimmer/swt/menu_proxy.rb', line 96

def get_attribute(attribute_name)
  if attribute_name.to_s == "text"
    @swt_menu_item.getText
  else
    super(attribute_name)
  end
end

#handle_observation_request(observation_request, &block) ⇒ Object 



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

def handle_observation_request(observation_request, &block)
  if can_handle_observation_request?(observation_request, super_only: true)
    super
  else
    menu_item_proxy.handle_observation_request(observation_request, &block)
  end
end

#has_attribute?(attribute_name, *args) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/swt/menu_proxy.rb', line 78

def has_attribute?(attribute_name, *args)
  if attribute_name.to_s == "text"
    true
  else
    super(attribute_name, *args)
  end
end

#set_attribute(attribute_name, *args) ⇒ Object 



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

def set_attribute(attribute_name, *args)
  attribute_name
  if attribute_name.to_s == "text"
    text_value = args[0]
    @swt_menu_item.setText text_value
  else
    super(attribute_name, *args)
  end
end