Module: Glimmer::UI::CustomWidget

Includes:
DataBinding::ObservableModel, SuperModule
Included in:
CustomShell
Defined in:
lib/glimmer/ui/custom_widget.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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



257
258
259
260
261
262
263
 
# File 'lib/glimmer/ui/custom_widget.rb', line 257

def method_missing(method, *args, &block)
  if can_handle_observation_request?(method)
    handle_observation_request(method, &block)
  else
    body_root.send(method, *args, &block)
  end
end

Instance Attribute Details

#body_root ⇒ Object (readonly)

Returns the value of attribute body_root.



144
145
146
 
# File 'lib/glimmer/ui/custom_widget.rb', line 144

def body_root
  @body_root
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



144
145
146
 
# File 'lib/glimmer/ui/custom_widget.rb', line 144

def options
  @options
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



144
145
146
 
# File 'lib/glimmer/ui/custom_widget.rb', line 144

def parent
  @parent
end

#swt_style ⇒ Object (readonly)

Returns the value of attribute swt_style.



144
145
146
 
# File 'lib/glimmer/ui/custom_widget.rb', line 144

def swt_style
  @swt_style
end

#swt_widget ⇒ Object (readonly)

Returns the value of attribute swt_widget.



144
145
146
 
# File 'lib/glimmer/ui/custom_widget.rb', line 144

def swt_widget
  @swt_widget
end

Class Method Details

.add_custom_widget_namespaces_for(klass) ⇒ Object 



70
71
72
73
74
 
# File 'lib/glimmer/ui/custom_widget.rb', line 70

def add_custom_widget_namespaces_for(klass)
  Glimmer::UI::CustomWidget.namespaces_for_class(klass).drop(1).each do |namespace|
    Glimmer::UI::CustomWidget.custom_widget_namespaces << namespace
  end
end

.after_body(&block) ⇒ Object 



138
139
140
141
 
# File 'lib/glimmer/ui/custom_widget.rb', line 138

def after_body(&block)
  @after_body_blocks ||= []
  @after_body_blocks << block
end

.before_body(&block) ⇒ Object 



129
130
131
132
 
# File 'lib/glimmer/ui/custom_widget.rb', line 129

def before_body(&block)
  @before_body_blocks ||= []
  @before_body_blocks << block
end

.body(&block) ⇒ Object 



134
135
136
 
# File 'lib/glimmer/ui/custom_widget.rb', line 134

def body(&block)
  @body_block = block
end

.custom_widget_namespaces ⇒ Object 



84
85
86
 
# File 'lib/glimmer/ui/custom_widget.rb', line 84

def custom_widget_namespaces
  @custom_widget_namespaces ||= reset_custom_widget_namespaces
end

.def_option_attr_accessors(new_options) ⇒ Object 



116
117
118
119
120
121
122
123
124
125
126
127
 
# File 'lib/glimmer/ui/custom_widget.rb', line 116

def def_option_attr_accessors(new_options)
  new_options.each do |option, default|
    class_eval <<-end_eval, __FILE__, __LINE__
      def #{option}
        options[:#{option}]
      end
      def #{option}=(option_value)
        self.options[:#{option}] = option_value
      end
    end_eval
  end
end

.for(underscored_custom_widget_name) ⇒ Object 



42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
 
# File 'lib/glimmer/ui/custom_widget.rb', line 42

def for(underscored_custom_widget_name)
  extracted_namespaces = underscored_custom_widget_name.
    to_s.
    split(/__/).map do |namespace|
      namespace.camelcase(:upper)
    end
  custom_widget_namespaces.each do |base|
    extracted_namespaces.reduce(base) do |result, namespace|
      if !result.constants.include?(namespace)
        namespace = result.constants.detect {|c| c.to_s.upcase == namespace.to_s.upcase } || namespace
      end
      begin
        constant = result.const_get(namespace)
        return constant if constant.ancestors.include?(Glimmer::UI::CustomWidget)
        constant
      rescue => e
        # Glimmer::Config.logger.debug {"#{e.message}\n#{e.backtrace.join("\n")}"}
        result
      end
    end
  end
  raise "#{underscored_custom_widget_name} has no custom widget class!"
rescue => e
  Glimmer::Config.logger.debug {e.message}
  Glimmer::Config.logger.debug {"#{e.message}\n#{e.backtrace.join("\n")}"}
  nil
end

.namespaces_for_class(m) ⇒ Object 



76
77
78
79
80
81
82
 
# File 'lib/glimmer/ui/custom_widget.rb', line 76

def namespaces_for_class(m)
  return [m] if m.name.nil?
  namespace_constants = m.name.split(/::/).map(&:to_sym)
  namespace_constants.reduce([Object]) do |output, namespace_constant|
    output += [output.last.const_get(namespace_constant)]
  end[1..-1].uniq.reverse
end

.option(new_option, default: nil) ⇒ Object 



109
110
111
112
113
114
 
# File 'lib/glimmer/ui/custom_widget.rb', line 109

def option(new_option, default: nil)
  new_option = new_option.to_s.to_sym
  new_options = {new_option => default}
  @options = options.merge(new_options)
  def_option_attr_accessors(new_options)
end

.options(*new_options) ⇒ Object

Allows defining convenience option accessors for an array of option names Example: ‘options :color1, :color2` defines `#color1` and `#color2` where they return the instance values `options` and `options` respectively. Can be called multiple times to set more options additively. When passed no arguments, it returns list of all option names captured so far



98
99
100
101
102
103
104
105
106
107
 
# File 'lib/glimmer/ui/custom_widget.rb', line 98

def options(*new_options)
  new_options = new_options.compact.map(&:to_s).map(&:to_sym)
  if new_options.empty?
    @options ||= {} # maps options to defaults
  else
    new_options = new_options.reduce({}) {|new_options_hash, new_option| new_options_hash.merge(new_option => nil)}
    @options = options.merge(new_options)
    def_option_attr_accessors(new_options)
  end
end

.reset_custom_widget_namespaces ⇒ Object 



88
89
90
 
# File 'lib/glimmer/ui/custom_widget.rb', line 88

def reset_custom_widget_namespaces
  @custom_widget_namespaces = Set[Object, Glimmer::UI]
end

Instance Method Details

#add_observer(observer, attribute_name) ⇒ Object 



191
192
193
194
195
196
197
 
# File 'lib/glimmer/ui/custom_widget.rb', line 191

def add_observer(observer, attribute_name)
  if has_instance_method?(attribute_name)
    super
  else
    @body_root.add_observer(observer, attribute_name)
  end
end

#async_exec(&block) ⇒ Object

TODO see if it is worth it to eliminate duplication of async_exec/sync_exec delegation to DisplayProxy, via a module



239
240
241
 
# File 'lib/glimmer/ui/custom_widget.rb', line 239

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

#attribute_setter(attribute_name) ⇒ Object 



228
229
230
 
# File 'lib/glimmer/ui/custom_widget.rb', line 228

def attribute_setter(attribute_name)
  "#{attribute_name}="
end

#can_add_observer?(attribute_name) ⇒ Boolean

Returns:

  • (Boolean) 


187
188
189
 
# File 'lib/glimmer/ui/custom_widget.rb', line 187

def can_add_observer?(attribute_name)
  has_instance_method?(attribute_name) || has_instance_method?("#{attribute_name}?") || @body_root.can_add_observer?(attribute_name)
end

#can_handle_observation_request?(observation_request) ⇒ Boolean

Returns:

  • (Boolean) 


167
168
169
170
171
172
173
174
175
 
# File 'lib/glimmer/ui/custom_widget.rb', line 167

def can_handle_observation_request?(observation_request)
  observation_request = observation_request.to_s
  result = false
  if observation_request.start_with?('on_updated_')
    property = observation_request.sub(/^on_updated_/, '')
    result = can_add_observer?(property)
  end
  result || body_root&.can_handle_observation_request?(observation_request)
end

#content(&block) ⇒ Object

Returns content block if used as an attribute reader (no args) Otherwise, if a block is passed, it adds it as content to this custom widget



249
250
251
252
253
254
255
 
# File 'lib/glimmer/ui/custom_widget.rb', line 249

def content(&block)
  if block_given?
    body_root.content(&block)
  else
    @content
  end
end

#get_attribute(attribute_name) ⇒ Object 



220
221
222
223
224
225
226
 
# File 'lib/glimmer/ui/custom_widget.rb', line 220

def get_attribute(attribute_name)
  if has_instance_method?(attribute_name)
    send(attribute_name)
  else
    @body_root.get_attribute(attribute_name)
  end
end

#handle_observation_request(observation_request, &block) ⇒ Object 



177
178
179
180
181
182
183
184
185
 
# File 'lib/glimmer/ui/custom_widget.rb', line 177

def handle_observation_request(observation_request, &block)
  observation_request = observation_request.to_s
  if observation_request.start_with?('on_updated_')
    property = observation_request.sub(/^on_updated_/, '') # TODO look into eliminating duplication from above
    add_observer(DataBinding::Observer.proc(&block), property) if can_add_observer?(property)
  else
    body_root.handle_observation_request(observation_request, &block)
  end
end

#has_attribute?(attribute_name, *args) ⇒ Boolean

Returns:

  • (Boolean) 


199
200
201
202
 
# File 'lib/glimmer/ui/custom_widget.rb', line 199

def has_attribute?(attribute_name, *args)
  has_instance_method?(attribute_setter(attribute_name)) ||
    @body_root.has_attribute?(attribute_name, *args)
end

#has_instance_method?(method_name) ⇒ Boolean

This method ensures it has an instance method not coming from Glimmer DSL

Returns:

  • (Boolean) 


213
214
215
216
217
218
 
# File 'lib/glimmer/ui/custom_widget.rb', line 213

def has_instance_method?(method_name)
  respond_to?(method_name) && 
    !swt_widget.respond_to?(method_name) &&
    !method(method_name)&.source_location&.first&.include?('glimmer/dsl/engine.rb') && 
    !method(method_name)&.source_location&.first&.include?('glimmer/swt/widget_proxy.rb')
end

#has_style?(style) ⇒ Boolean

Returns:

  • (Boolean) 


232
233
234
 
# File 'lib/glimmer/ui/custom_widget.rb', line 232

def has_style?(style)
  (swt_style & SWT::SWTProxy[style]) == SWT::SWTProxy[style]
end

#initialize(parent, *swt_constants, options, &content) ⇒ Object

Raises:

  • (Glimmer::Error) 


146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
 
# File 'lib/glimmer/ui/custom_widget.rb', line 146

def initialize(parent, *swt_constants, options, &content)
  @parent = parent
  @swt_style = SWT::SWTProxy[*swt_constants]
  options ||= {}
  @options = self.class.options.merge(options)
  @content = Util::ProcTracker.new(content) if content
  execute_hooks('before_body')
  body_block = self.class.instance_variable_get("@body_block")
  raise Glimmer::Error, 'Invalid custom widget for having no body! Please define body block!' if body_block.nil?
  @body_root = instance_exec(&body_block)
  raise Glimmer::Error, 'Invalid custom widget for having an empty body! Please fill body block!' if @body_root.nil?
  @swt_widget = @body_root.swt_widget
  @swt_widget.set_data('custom_widget', self)
  execute_hooks('after_body')
end

#local_respond_to? ⇒ Object 



265
 
# File 'lib/glimmer/ui/custom_widget.rb', line 265

alias local_respond_to? respond_to?

#post_initialize_child(child) ⇒ Object

Subclasses may override to perform post initialization work on an added child



163
164
165
 
# File 'lib/glimmer/ui/custom_widget.rb', line 163

def post_initialize_child(child)
  # No Op by default
end

#respond_to?(method, *args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


266
267
268
269
270
 
# File 'lib/glimmer/ui/custom_widget.rb', line 266

def respond_to?(method, *args, &block)
  super or
    can_handle_observation_request?(method) or
    body_root.respond_to?(method, *args, &block)
end

#set_attribute(attribute_name, *args) ⇒ Object 



204
205
206
207
208
209
210
 
# File 'lib/glimmer/ui/custom_widget.rb', line 204

def set_attribute(attribute_name, *args)
  if has_instance_method?(attribute_setter(attribute_name))
    send(attribute_setter(attribute_name), *args)
  else
    @body_root.set_attribute(attribute_name, *args)
  end
end

#sync_exec(&block) ⇒ Object 



243
244
245
 
# File 'lib/glimmer/ui/custom_widget.rb', line 243

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