Class: LessCurse::Widgets::List

Inherits:
Base
  • Object
show all
Defined in:
lib/less_curse/widgets/list.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#actions, #data, #focus, #title

Instance Method Summary collapse

Methods inherited from Base

#focused?, #unfocus

Constructor Details

#initialize(data: [], title: "") ⇒ List

Returns a new instance of List.



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# File 'lib/less_curse/widgets/list.rb', line 9

def initialize data: [], title: ""
  super(data: data, title: title)
end

Instance Attribute Details

#display_func ⇒ Object

Returns the value of attribute display_func.



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# File 'lib/less_curse/widgets/list.rb', line 7

def display_func
  @display_func
end

#on_select ⇒ Object

Returns the value of attribute on_select.



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# File 'lib/less_curse/widgets/list.rb', line 4

def on_select
  @on_select
end

#selected_data ⇒ Object

Returns the value of attribute selected_data.



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# File 'lib/less_curse/widgets/list.rb', line 5

def selected_data
  @selected_data
end

#top_element_idx ⇒ Object

Returns the value of attribute top_element_idx.



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# File 'lib/less_curse/widgets/list.rb', line 6

def top_element_idx
  @top_element_idx
end

Instance Method Details

#draw(window) ⇒ Object 



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# File 'lib/less_curse/widgets/list.rb', line 20

def draw window
  LessCurse::Renderer::bold_if focused?, window do
    LessCurse::Renderer::box_with_title window, @title
  end

  # Do we have kind of a display-window?
  visible_data.each_with_index do |d, idx|
    LessCurse::Renderer::bold_if(@selected_data == d, window) do
      if @display_func
        item_text = display_func.call(d)
      else
        item_text = d.to_s
      end
      LessCurse::Renderer::write_line window, idx, item_text
    end
  end

  if visible_data.size != @data.size
    LessCurse::Renderer::box_foot window, "..."
  end
end

#handle_input(key) ⇒ Object 



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# File 'lib/less_curse/widgets/list.rb', line 42

def handle_input key
  action = @actions[key]
  LessCurse::debug_msg "List will execute action: #{action}"
  return false if !action
  send(action)
end

#select_next ⇒ Object

Select next data element in list (roll over if nexessary)



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# File 'lib/less_curse/widgets/list.rb', line 64

def select_next
  if @selected_data.nil? && @data.size >= 0
    @selected_data = @data.to_a[0]
  else
    @selected_data = @data.to_a[(selected_data_index + 1) % @data.size]
  end
  recalc_top_index
  if @on_select
    @on_select.call @selected_data
  end
  @selected_data
end

#select_previous ⇒ Object

Select previous data element in list (roll over if nexessary)



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# File 'lib/less_curse/widgets/list.rb', line 50

def select_previous
  if @selected_data.nil? && @data.size >= 0
    @selected_data = @data.to_a[0]
  else
    @selected_data = @data.to_a[(selected_data_index - 1) % @data.size]
  end
  recalc_top_index
  if @on_select
    @on_select.call @selected_data
  end
  @selected_data
end

#set_default_actions ⇒ Object 



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# File 'lib/less_curse/widgets/list.rb', line 15

def set_default_actions
  @actions = { FFI::NCurses::KEY_UP   => :select_previous,
               FFI::NCurses::KEY_DOWN => :select_next}
end