Class List Method List File List

# Module: OSX::NSKVCBehaviorAttachment

Includes:
  NSKVCAccessorUtil
Included in:
  OCClsWrapper
Defined in:
  src/ruby/osx/objc/oc_import.rb

## Overview

Utility for Key-Value Coding.

## Instance Method Summary (collapse)

- - (Object) kvc_accessor(*args)

  Defines accessor methods from given names.

- - (Object) kvc_array_accessor(*args)

  Define accessors that send change notifications for an array.

- - (Object) kvc_depends_on(keys, *dependencies)

  see sample/CurrencyConverter/.

- - (Object) kvc_reader(*args)
- - (Object) kvc_wrapper(*keys)

  Defines accesor methods for keys defined in Objective-C, such as NSUserDefaultsController and NSManagedObject.

- - (Object) kvc_wrapper_reader(*keys)
- - (Object) kvc_wrapper_writer(*keys)
- - (Object) kvc_writer(*args)

## Instance Method Details

### - (`Object`) kvc_accessor(*args)

Defines accessor methods from given names. Writer methods aware Key-Value Observing.

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    # File 'src/ruby/osx/objc/oc_import.rb', line 623

    def kvc_accessor(*args)
      kvc_reader(*args)
      kvc_writer(*args)
    end

### - (`Object`) kvc_array_accessor(*args)

Define accessors that send change notifications for an array. The array instance variable must respond to the following methods:

- length
- [index]
- [index]=
- insert(index,obj)
- delete_at(index)

Notifications are only sent for accesses through the Cocoa methods: countOfKey, objectInKeyAtIndex_, insertObject_inKeyAtIndex_, removeObjectFromKeyAtIndex_, replaceObjectInKeyAtIndex_withObject_

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    # File 'src/ruby/osx/objc/oc_import.rb', line 677

    def kvc_array_accessor(*args)
      args.each do |key|
        keyname = key.to_s
        keyname[0..0] = keyname[0..0].upcase
        self.addRubyMethod_withType("countOf#{keyname}".to_sym, "i4@8:12")
        self.addRubyMethod_withType("objectIn#{keyname}AtIndex:".to_sym, "@4@8:12i16")
        self.addRubyMethod_withType("insertObject:in#{keyname}AtIndex:".to_sym, "@4@8:12@16i20")
        self.addRubyMethod_withType("removeObjectFrom#{keyname}AtIndex:".to_sym, "@4@8:12i16")
        self.addRubyMethod_withType("replaceObjectIn#{keyname}AtIndex:withObject:".to_sym, "@4@8:12i16@20")
        # get%s:range: - unimplemented. You can implement this method for performance improvements.
        self.class_eval <<-EOT,__FILE__,__LINE__+1
          def countOf#{keyname}()
            @#{key.to_s}.length
          end

          def objectIn#{keyname}AtIndex(index)
            @#{key.to_s}[index]
          end

          def insertObject_in#{keyname}AtIndex(obj, index)
            indexes = OSX::NSIndexSet.indexSetWithIndex(index)
     if self.class.automaticallyNotifiesObserversForKey('#{key.to_s}')
       willChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeInsertion, indexes, #{key.inspect})
       @#{key.to_s}.insert(index, obj)
       didChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeInsertion, indexes, #{key.inspect})
     else
       @#{key.to_s}.insert(index, obj)
     end
            nil
          end

          def removeObjectFrom#{keyname}AtIndex(index)
            indexes = OSX::NSIndexSet.indexSetWithIndex(index)
     if self.class.automaticallyNotifiesObserversForKey('#{key.to_s}')
       willChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeRemoval, indexes, #{key.inspect})
       @#{key.to_s}.delete_at(index)
       didChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeRemoval, indexes, #{key.inspect})
     else
       @#{key.to_s}.delete_at(index)
     end
            nil
          end

          def replaceObjectIn#{keyname}AtIndex_withObject(index, obj)
            indexes = OSX::NSIndexSet.indexSetWithIndex(index)
     if self.class.automaticallyNotifiesObserversForKey('#{key.to_s}')
       willChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeReplacement, indexes, #{key.inspect})
       @#{key.to_s}[index] = obj
       didChange_valuesAtIndexes_forKey(OSX::NSKeyValueChangeReplacement, indexes, #{key.inspect})
     else
       @#{key.to_s}[index] = obj
     end
            nil
          end
        EOT
      end
    end

### - (`Object`) kvc_depends_on(keys, *dependencies)

see sample/CurrencyConverter/.

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    # File 'src/ruby/osx/objc/oc_import.rb', line 629

    def kvc_depends_on(keys, *dependencies)
      dependencies.flatten.each do |dependentKey|
        setKeys_triggerChangeNotificationsForDependentKey(Array(keys), dependentKey)
      end
    end

### - (`Object`) kvc_reader(*args)

See Also:

- #kvc_accessor

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    # File 'src/ruby/osx/objc/oc_import.rb', line 595

    def kvc_reader(*args)
      attr_reader(*args)
    end

### - (`Object`) kvc_wrapper(*keys)

Defines accesor methods for keys defined in Objective-C, such as NSUserDefaultsController and NSManagedObject.

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    # File 'src/ruby/osx/objc/oc_import.rb', line 637

    def kvc_wrapper(*keys)
      kvc_wrapper_reader(*keys)
      kvc_wrapper_writer(*keys)
    end

### - (`Object`) kvc_wrapper_reader(*keys)

See Also:

- #kvc_wrapper

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    # File 'src/ruby/osx/objc/oc_import.rb', line 643

    def kvc_wrapper_reader(*keys)
      keys.flatten.compact.each do |key|
        class_eval <<-EOE_KVC_WRAPPER,__FILE__,__LINE__+1
          def #{key}
            valueForKey("#{key}")
          end
        EOE_KVC_WRAPPER
      end
    end

### - (`Object`) kvc_wrapper_writer(*keys)

See Also:

- #kvc_wrapper

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    # File 'src/ruby/osx/objc/oc_import.rb', line 654

    def kvc_wrapper_writer(*keys)
      keys.flatten.compact.each do |key|
        class_eval <<-EOE_KVC_WRAPPER,__FILE__,__LINE__+1
          def #{key}=(val)
            setValue_forKey(val, "#{key}")
          end
        EOE_KVC_WRAPPER
      end
    end

### - (`Object`) kvc_writer(*args)

See Also:

- #kvc_accessor

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    # File 'src/ruby/osx/objc/oc_import.rb', line 600

    def kvc_writer(*args)
      args.flatten.each do |key|
    	next if method_defined?(kvc_setter_wrapper(key))
        setter = key.to_s + '='
        attr_writer(key) unless method_defined?(setter)
        alias_method kvc_internal_setter(key), setter
        self.class_eval <<-EOE_KVC_WRITER,__FILE__,__LINE__+1
          def #{kvc_setter_wrapper(key)}(value)
     if self.class.automaticallyNotifiesObserversForKey('#{key.to_s}')
       willChangeValueForKey('#{key.to_s}')
       send('#{kvc_internal_setter(key)}', value)
       didChangeValueForKey('#{key.to_s}')
     else
       send('#{kvc_internal_setter(key)}', value)
     end
          end
        EOE_KVC_WRITER
        alias_method setter, kvc_setter_wrapper(key)
      end
    end