Class: Gtk::Layout

Inherits:
Object
  • Object
show all
Includes:
Freightrain::LayoutWidget
Defined in:
lib/extensions/gtk/widgets/gtk_layout.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Freightrain::LayoutWidget

#add_signal_callback

Instance Attribute Details

#elements ⇒ Object

Returns the value of attribute elements.



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 8

def elements
  @elements
end

#viewmodel=(value) ⇒ Object (writeonly)

Sets the attribute viewmodel

Parameters:

  • value —

    the value to set the attribute viewmodel to.



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 7

def viewmodel=(value)
  @viewmodel = value
end

Instance Method Details

#bind(options) ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 76

def bind(options)
  if options[:property].to_s == "elements"
    @viewmodel      = (options[:element].to_s + "_element_view_model").to_sym
    options[:force] = true
  end
  super(options)
end

#default_display_logic(elements, enumerable) ⇒ Object

TODO:remove



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 24

def default_display_logic(elements, enumerable)
  #TODO: clean this mess        
  height = elements.length
  delta = enumerable.length - elements.length
  delta.abs.times do
    if delta > 0
      item = self.get_new_item
      self.put(item.control, 0, item.control.height_request * height)
      elements << item
      height += 1
    else
      item = self.children.last
      self.remove(item)
      elements.delete_if {|element| element.control == item }
    end
  end
  height_factor = self.get_new_item.control.height_request
  self.height = elements.length * height_factor
  (0...elements.length).each do |index|
    elements[index].value = enumerable[index]
  end
end

#display_logic(enumerable) ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 47

def display_logic(enumerable)
  if @display_logic
    @display_logic.call(self, @elements, enumerable)
  else
    default_display_logic(@elements, enumerable)
  end
end

#get_new_item ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 84

def get_new_item
  item = Freightrain[@viewmodel]
  item.signals.each do |key, signal|
   signal.connect(@signals[key]) if @signals[key]
  end
  return item
end

#selected ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 66

def selected
  return @elements.select { |element| element.selected == true}.first
end

#selected=(val) ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 70

def selected=(val)
  @elements.each do |element|
    element.set_selection(val == element.value)
  end
end

#set_display_logic ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 55

def set_display_logic
  @display_logic = lambda do |widget, elements, enumerable|
    yield(widget, elements, enumerable)
  end
end

#setup ⇒ Object 



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# File 'lib/extensions/gtk/widgets/gtk_layout.rb', line 10

def setup
  @signals ||= {}
  selected_callback   = @signals[:selected]
  @signals[:selected] = lambda do |value|
                          elements.each do |item|
                            item.set_selection(item.value == value)
                          end
                          selected_callback.call(value) if selected_callback
                        end
  @elements ||= []      
  @ready = true
end