Class: TkComponent::BrowserColumnComponent

Inherits:
Base
  • Object
show all
Defined in:
lib/tk_component/components/browser_column_component.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#children, #node, #parent, #parent_node, #tk_item

Instance Method Summary collapse

Methods inherited from Base

#add_child, #build, #emit, #generate, #name, #parse_component, #parse_nodes, #rebuild, #regenerate, #regenerate_after_node, #regenerate_from_index, #regenerate_from_node

Methods included from BasicComponent

#focus

Constructor Details

#initialize(options = {}) ⇒ BrowserColumnComponent

Returns a new instance of BrowserColumnComponent.



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# File 'lib/tk_component/components/browser_column_component.rb', line 7

def initialize(options = {})
  super
  @browser = options[:browser]
  @column_index = options[:column_index] || 0
end

Instance Attribute Details

#browser ⇒ Object

Returns the value of attribute browser.



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# File 'lib/tk_component/components/browser_column_component.rb', line 4

def browser
  @browser
end

#column_index ⇒ Object

Returns the value of attribute column_index.



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# File 'lib/tk_component/components/browser_column_component.rb', line 5

def column_index
  @column_index
end

Instance Method Details

#component_did_build ⇒ Object 



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# File 'lib/tk_component/components/browser_column_component.rb', line 50

def component_did_build
  show_current_selection
end

#render(p, parent_component) ⇒ Object 



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# File 'lib/tk_component/components/browser_column_component.rb', line 13

def render(p, parent_component)
  if @column_index <= @browser.selected_path.size
    current_item = @browser.selected_path[@column_index]
    path_so_far = @browser.selected_path.slice(0, @column_index)
    items = @browser.data_source.items_for_path(path_so_far)
    items ||= []
  else
    items = []
    current_item = nil
  end
  command = @browser.paned ? :hpaned : :hframe
  p.send(command, sticky: 'nsew', x_flex: 1, y_flex: 1) do |f|
    @tree = f.tree(sticky: 'nsew', x_flex: 1, y_flex: 1,
                   on_select: :select_item,
                   scrollers: 'y', heading: @browser.data_source.title_for_path(path_so_far, items)) do |t|
      items.each do |item|
        t.tree_node(at: 'end',
                    text: item,
                    selected: item == current_item)
      end
    end
    if (@browser.max_columns.blank? || @browser.max_columns > @column_index + 1) &&
       (@column_index < @browser.selected_path.size || items.present?)               
      f.hframe(sticky: 'nsew', x_flex: 1, y_flex: 1) do |hf|
        @next_column = hf.insert_component(TkComponent::BrowserColumnComponent, self,
                                           browser: @browser,
                                           column_index: @column_index + 1,
                                           sticky: 'nsew', x_flex: 1, y_flex: 1) do |bc|
          bc.on_event 'ItemSelected', ->(e) do
            emit('ItemSelected')
          end
        end
      end
    end
  end
end

#select_item(e) ⇒ Object 



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# File 'lib/tk_component/components/browser_column_component.rb', line 58

def select_item(e)
  item = e.sender.native_item.selection&.first.text.to_s
  return if @browser.selected_path[@column_index] == item
  @browser.selected_path[@column_index] = item
  @browser.selected_path.slice!(@column_index + 1..-1) if @column_index < @browser.selected_path.size - 1
  puts "New selected path: #{@browser.selected_path}"
  @next_column&.regenerate
  emit('ItemSelected')
end

#show_current_selection ⇒ Object 



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# File 'lib/tk_component/components/browser_column_component.rb', line 54

def show_current_selection
  @tree.tk_item.scroll_to_selection
end