Class: TkComponent::Builder::TkTree

Inherits:
TkItem
  • Object
show all
Includes:
Scrollable
Defined in:
lib/tk_component/builder/tk_item.rb

Constant Summary

Constants included from Scrollable

Scrollable::ROOT_FRAME_OPTIONS

Instance Attribute Summary

Attributes inherited from TkItem

#native_item

Instance Method Summary collapse

Methods included from Scrollable

#initialize, #remove

Methods inherited from TkItem

#apply_internal_grid, #built, create, #create_native_item, #focus, #initialize, #native_item_class, #remove, #set_event_handlers, #set_grid

Instance Method Details

#apply_option(option, v, to_item = self.native_item) ⇒ Object 



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# File 'lib/tk_component/builder/tk_item.rb', line 297

def apply_option(option, v, to_item = self.native_item)
  case option.to_sym
  when :column_defs
    @column_defs = v
  when :heading
    @column_defs = [ { key: '#0', text: v } ]
  else
    super
  end
end

#apply_options(options, to_item = self.native_item) ⇒ Object 



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# File 'lib/tk_component/builder/tk_item.rb', line 283

def apply_options(options, to_item = self.native_item)
  super
  return unless @column_defs.present?
  cols = @column_defs.map { |c| c[:key] }
  to_item.columns(cols[1..-1].join(' ')) unless cols == ['#0']
  @column_defs.each.with_index do |cd, idx|
    key = idx == 0 ? '#0' : cd[:key]
    column_conf = cd.slice(:width, :anchor)
    to_item.column_configure(key, column_conf) unless column_conf.empty?
    heading_conf = cd.slice(:text)
    to_item.heading_configure(key, heading_conf) unless heading_conf.empty?
  end
end

#scroll_to_item(tree_item) ⇒ Object

Right now it only works well for non-nested trees



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# File 'lib/tk_component/builder/tk_item.rb', line 324

def scroll_to_item(tree_item)
  return unless tree_item.present?
  items = @native_item.children('')
  rel_pos = items.index(tree_item).to_f / items.size.to_f
  @native_item.after(200) { @native_item.yview_moveto(rel_pos) }
end

#scroll_to_selection ⇒ Object 



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# File 'lib/tk_component/builder/tk_item.rb', line 319

def scroll_to_selection
  scroll_to_item(@native_item.selection.first)
end

#set_event_handler(event_handler) ⇒ Object 



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# File 'lib/tk_component/builder/tk_item.rb', line 308

def set_event_handler(event_handler)
  case event_handler.name
  when :select
    Event.bind_event('<TreeviewSelect>', self, event_handler.options, event_handler.lambda)
  when :item_open
    Event.bind_event('<TreeviewOpen>', self, event_handler.options, event_handler.lambda)
  else
    super
  end
end