Class: Glimmer::SWT::WidgetProxy
- Inherits:
-
Object
- Object
- Glimmer::SWT::WidgetProxy
- Includes:
- DataBinding::ObservableWidget, Packages
- 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
Direct Known Subclasses
Constant Summary collapse
- DEFAULT_STYLES =
{ "text" => [:border], "table" => [:border], "tree" => [:virtual, :border, :h_scroll, :v_scroll], "spinner" => [:border], "styled_text" => [:border], "list" => [:border, :v_scroll], "button" => [:push], "menu_item" => [:push], }
- DEFAULT_INITIALIZERS =
{ "composite" => lambda do |composite| composite.setLayout(GridLayout.new) 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.setLayout(GridLayout.new) end, }
Instance Attribute Summary collapse
-
#swt_widget ⇒ Object
readonly
Returns the value of attribute swt_widget.
Class Method Summary collapse
-
.swt_widget_class_for(underscored_widget_name) ⇒ Object
This supports widgets in and out of basic SWT.
- .widget_exists?(underscored_widget_name) ⇒ Boolean
Instance Method Summary collapse
-
#add_observer(observer, property_name) ⇒ Object
Used for data-binding only.
- #async_exec(&block) ⇒ Object
-
#can_add_observer?(property_name) ⇒ Boolean
TODO Consider renaming these methods as they are mainly used for data-binding.
-
#can_handle_observation_request?(observation_request) ⇒ Boolean
TODO eliminate duplication in the following methods perhaps by relying on exceptions.
- #content(&block) ⇒ Object
- #dispose ⇒ Object
- #extract_args(underscored_widget_name, args) ⇒ Object
- #get_attribute(attribute_name) ⇒ Object
- #handle_observation_request(observation_request, &block) ⇒ Object
- #has_attribute?(attribute_name, *args) ⇒ Boolean
- #has_style?(style) ⇒ Boolean
-
#initialize(underscored_widget_name, parent, args) ⇒ WidgetProxy
constructor
Initializes a new SWT Widget.
- #pack_same_size ⇒ Object
- #remove_observer(observer, property_name) ⇒ Object
- #set_attribute(attribute_name, *args) ⇒ Object
- #sync_exec(&block) ⇒ Object
- #widget_property_listener_installers ⇒ Object
Methods included from DataBinding::ObservableWidget
Constructor Details
#initialize(underscored_widget_name, parent, args) ⇒ WidgetProxy
Initializes a new SWT Widget
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 57 def initialize(, parent, args) styles, = extract_args(, args) = self.class.() @swt_widget = .new(parent., style(, styles), *) DEFAULT_INITIALIZERS[]&.call(@swt_widget) end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class Glimmer::DataBinding::ObservableWidget
Instance Attribute Details
#swt_widget ⇒ Object (readonly)
Returns the value of attribute swt_widget.
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# File 'lib/glimmer/swt/widget_proxy.rb', line 52 def @swt_widget end |
Class Method Details
.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 214 def self.() = .camelcase(:upper) = eval() unless .ancestors.include?(org.eclipse.swt..Widget) Glimmer::Config.logger&.debug("Class #{} matching #{} is not a subclass of org.eclipse.swt.widgets.Widget") return nil end rescue NameError => e Glimmer::Config.logger&.debug e. # Glimmer::Config.logger&.debug("#{e.message}\n#{e.backtrace.join("\n")}") nil rescue => e Glimmer::Config.logger&.debug e. # Glimmer::Config.logger&.debug("#{e.message}\n#{e.backtrace.join("\n")}") nil end |
.widget_exists?(underscored_widget_name) ⇒ Boolean
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# File 'lib/glimmer/swt/widget_proxy.rb', line 209 def self.() !!() 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 255 def add_observer(observer, property_name) property_listener_installers = @swt_widget.class.ancestors.map {|ancestor| [ancestor]}.compact = property_listener_installers.map{|installer| installer[property_name.to_s.to_sym]}.compact if !property_listener_installers.empty? .to_a.each do || .call(observer) end end |
#async_exec(&block) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 232 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
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# File 'lib/glimmer/swt/widget_proxy.rb', line 250 def can_add_observer?(property_name) @swt_widget.class.ancestors.map {|ancestor| [ancestor]}.compact.map(&:keys).flatten.map(&:to_s).include?(property_name.to_s) end |
#can_handle_observation_request?(observation_request) ⇒ Boolean
TODO eliminate duplication in the following methods perhaps by relying on exceptions
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# File 'lib/glimmer/swt/widget_proxy.rb', line 269 def can_handle_observation_request?(observation_request) observation_request = observation_request.to_s if observation_request.start_with?('on_event_') constant_name = observation_request.sub(/^on_event_/, '') SWTProxy.has_constant?(constant_name) elsif observation_request.start_with?('on_') event = observation_request.sub(/^on_/, '') can_add_listener?(event) else false end end |
#content(&block) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 292 def content(&block) Glimmer::DSL::Engine.add_content(self, Glimmer::DSL::SWT::WidgetExpression.new, &block) end |
#dispose ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 244 def dispose @swt_widget.dispose end |
#extract_args(underscored_widget_name, args) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 64 def extract_args(, args) @arg_extractor_mapping ||= { 'menu_item' => lambda do |args| index = args.delete(args.last) if args.last.is_a?(Numeric) = [index].compact styles = args [styles, ] end, } if @arg_extractor_mapping[] @arg_extractor_mapping[].call(args) else [args, []] end end |
#get_attribute(attribute_name) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 99 def get_attribute(attribute_name) = [attribute_name.to_s] if @swt_widget.send([:getter][:name]) else @swt_widget.send(attribute_getter(attribute_name)) end end |
#handle_observation_request(observation_request, &block) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 282 def handle_observation_request(observation_request, &block) if observation_request.start_with?('on_event_') constant_name = observation_request.sub(/^on_event_/, '') add_swt_event_listener(constant_name, &block) elsif observation_request.start_with?('on_') event = observation_request.sub(/^on_/, '') add_listener(event, &block) end end |
#has_attribute?(attribute_name, *args) ⇒ Boolean
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# File 'lib/glimmer/swt/widget_proxy.rb', line 80 def has_attribute?(attribute_name, *args) = [attribute_name.to_s] if @swt_widget.respond_to?([:setter][:name]) else @swt_widget.respond_to?(attribute_setter(attribute_name), args) end end |
#has_style?(style) ⇒ Boolean
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# File 'lib/glimmer/swt/widget_proxy.rb', line 240 def has_style?(style) (@swt_widget.style & SWTProxy[style]) == SWTProxy[style] end |
#pack_same_size ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 108 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 |
#remove_observer(observer, property_name) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 263 def remove_observer(observer, property_name) # TODO consider implementing if remove_observer is needed (consumers can remove listener via SWT API) end |
#set_attribute(attribute_name, *args) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 89 def set_attribute(attribute_name, *args) = [attribute_name.to_s] if [:setter][:invoker].call(@swt_widget, args) else apply_property_type_converters(attribute_name, args) @swt_widget.send(attribute_setter(attribute_name), *args) unless @swt_widget.send(attribute_getter(attribute_name)) == args.first end end |
#sync_exec(&block) ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 236 def sync_exec(&block) DisplayProxy.instance.sync_exec(&block) end |
#widget_property_listener_installers ⇒ Object
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# File 'lib/glimmer/swt/widget_proxy.rb', line 122 def @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, }, Java::OrgEclipseSwtWidgets::Text => { :text => lambda do |observer| on_modify_text { |modify_event| observer.call(@swt_widget.getText) } end, :caret_position => lambda do |observer| on_event_keydown { |event| observer.call(@swt_widget.getCaretPosition) } on_event_keyup { |event| observer.call(@swt_widget.getCaretPosition) } on_event_mousedown { |event| observer.call(@swt_widget.getCaretPosition) } on_event_mouseup { |event| observer.call(@swt_widget.getCaretPosition) } end, :selection_count => lambda do |observer| on_event_keydown { |event| observer.call(@swt_widget.getSelectionCount) } on_event_keyup { |event| observer.call(@swt_widget.getSelectionCount) } on_event_mousedown { |event| observer.call(@swt_widget.getSelectionCount) } on_event_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, }, Java::OrgEclipseSwtWidgets::Button => { :selection => lambda do |observer| { |selection_event| observer.call(@swt_widget.getSelection) } end }, Java::OrgEclipseSwtWidgets::MenuItem => { :selection => lambda do |observer| { |selection_event| observer.call(@swt_widget.getSelection) } end }, Java::OrgEclipseSwtWidgets::Spinner => { :selection => lambda do |observer| { |selection_event| observer.call(@swt_widget.getSelection) } end }, } end |