Module: QML::Reactive::Object

Extended by:
ClassMethods
Included in:
Access, QtObjectBase
Defined in:
lib/qml/reactive/object.rb

Overview

Note:

Currently Object can be included only by classes, not modules.

Object is used to define signals and properties within class definition. Signals and properties will be inherited by and can be overridden in subclasses.

See Also:

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ClassMethods

alias_property, alias_signal, instance_properties, instance_property, instance_signal, instance_signals, on, on_changed, variadic_signal

Class Method Details

.included(derived) ⇒ Object

When QML::Reactive::Object is included by a class, the class extends ClassMethods to add the common class methods.



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# File 'lib/qml/reactive/object.rb', line 14

def self.included(derived)
  fail Error, "SignalDef must be included in a class" unless derived.is_a? ::Class
  derived.extend(ClassMethods)
end

Instance Method Details

#initialize(*args, &block) ⇒ Object 



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# File 'lib/qml/reactive/object.rb', line 19

def initialize(*args, &block)
  super
  properties = self.class.instance_property_hash
    .values
    .map { |property| self.class.instance_property(property.original) }
    .uniq
  notifier_signals = properties.map(&:notifier_signal)
  signals = self.class.instance_signal_hash
    .values
    .map { |signal| self.class.instance_signal(signal.original) }
    .uniq - notifier_signals

  properties.each do |property|
    p = property.bind(self)
    instance_variable_set(:"@_property_#{property.name}", p)
    instance_variable_set(:"@_signal_#{property.notifier_signal.name}", p.changed)
  end
  signals.each do |signal|
    instance_variable_set(:"@_signal_#{signal.name}", signal.bind(self))
  end

  self.class.send(:initial_connections_hash).each do |name, blocks|
    blocks.each do |block|
      signal(name).connect do |*args|
        instance_exec(*args, &block)
      end
    end
  end
end

#properties ⇒ Array<Symbol>

Returns all property names.

Returns:

  • (Array<Symbol>) 


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# File 'lib/qml/reactive/object.rb', line 67

[%w{signal signals}, %w{property properties}].each do |singular, plural|
  class_eval "    def \#{singular}(name)\n      name = self.class.instance_\#{singular}(name).original\n      instance_variable_get(:\"@_\#{singular}_\\\#{name}\") or\n        fail ::NameError, \"undefined \#{singular} '\\\#{name}' for class '\\\#{self.class}'\"\n    end\n\n    def \#{plural}\n      self.class.instance_\#{plural}\n    end\n  EOS\nend\n", __FILE__, __LINE__ + 1

#property(name) ⇒ QML::Reactive::Property

Returns a property.

Parameters:

  • name (Symbol) —

    The property name

Returns:




# File 'lib/qml/reactive/object.rb', line 58

#signal(name) ⇒ QML::Reactive::Signal

Returns a signal.

Parameters:

  • name (Symbol) —

    The signal name

Returns:




# File 'lib/qml/reactive/object.rb', line 49

#signals ⇒ Array<Symbol>

Returns all signal names.

Returns:

  • (Array<Symbol>) 



# File 'lib/qml/reactive/object.rb', line 54