Class: Scarpe::Webview::Slot

Inherits:
Drawable show all
Defined in:
lib/scarpe/wv/slot.rb

Direct Known Subclasses

Flow, Stack

Constant Summary

Constants included from Shoes::Log

Shoes::Log::DEFAULT_COMPONENT, Shoes::Log::DEFAULT_DEBUG_LOG_CONFIG, Shoes::Log::DEFAULT_LOG_CONFIG

Instance Attribute Summary

Attributes inherited from Drawable

#children, #parent, #shoes_linkable_id

Attributes inherited from Shoes::Linkable

#linkable_id

Instance Method Summary collapse

Methods inherited from Drawable

#add_child, #bind, #destroy_self, display_class_for, #full_window_redraw!, #handler_js_code, #html_element, #html_id, #inspect, #needs_update!, #promise_update, #properties_changed, #remove_child, #set_parent, #shoes_styles, #to_html

Methods included from Shoes::Log

configure_logger, #log_init, logger

Methods inherited from Shoes::Linkable

#bind_shoes_event, #send_self_event, #send_shoes_event, #unsub_all_shoes_events, #unsub_shoes_event

Constructor Details

#initialize(properties) ⇒ Slot

Returns a new instance of Slot.



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# File 'lib/scarpe/wv/slot.rb', line 5

def initialize(properties)
  @event_callbacks = {}

  super
end

Instance Method Details

#element(&block) ⇒ Object 



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# File 'lib/scarpe/wv/slot.rb', line 11

def element(&block)
  props = shoes_styles.merge("html_attributes" => html_attributes)
  render_name = self.class.name.split("::")[-1].downcase # usually "stack" or "flow" or "documentroot"
  render(render_name, props, &block)
end

#html_attributes ⇒ Object (protected)

These get added for event handlers and passed to Calzini



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# File 'lib/scarpe/wv/slot.rb', line 54

def html_attributes
  attr = {}

  @event_callbacks.each do |event_name, handlers|
    attr[event_name] = handlers.values.join(";")
  end

  attr
end

#remove_event_callback(obj, event_name) ⇒ Object 



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# File 'lib/scarpe/wv/slot.rb', line 29

def remove_event_callback(obj, event_name)
  event_name = event_name.to_s
  @event_callbacks[event_name] ||= {}
  @event_callbacks[event_name].delete(obj)

  update_dom_event(event_name)
end

#remove_event_callbacks(obj) ⇒ Object 



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# File 'lib/scarpe/wv/slot.rb', line 37

def remove_event_callbacks(obj)
  changed = []

  @event_callbacks.each do |event_name, items|
    changed << event_name if items.delete(obj)
  end

  changed.each { |event_name| update_dom_event(event_name) }
end

#set_event_callback(obj, event_name, js_code) ⇒ Object 



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# File 'lib/scarpe/wv/slot.rb', line 17

def set_event_callback(obj, event_name, js_code)
  event_name = event_name.to_s
  @event_callbacks[event_name] ||= {}
  if @event_callbacks[event_name][obj]
    raise Scarpe::DuplicateCallbackError, "Can't have two callbacks on the same event, from the same object, on the same parent!"
  end

  @event_callbacks[event_name][obj] = js_code

  update_dom_event(event_name)
end

#update_dom_event(event_name) ⇒ Object (protected) 



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# File 'lib/scarpe/wv/slot.rb', line 49

def update_dom_event(event_name)
  html_element.set_attribute(event_name, @event_callbacks[event_name].values.join(";"))
end