Class: Salticid::Interface::TabView

Inherits:
View show all
Defined in:
lib/salticid/interface/tab_view.rb

Instance Attribute Summary

Attributes inherited from View

#height, #left, #top, #width, #window

Instance Method Summary collapse

Methods inherited from View

#hide, #show

Constructor Details

#initialize(interface, params = {}) ⇒ TabView

Returns a new instance of TabView.



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# File 'lib/salticid/interface/tab_view.rb', line 5

def initialize(interface, params = {})
  super

  @tabs = []
  @active = -1
end

Instance Method Details

#active ⇒ Object

Gets the active tab



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# File 'lib/salticid/interface/tab_view.rb', line 13

def active
  @tabs[@active] || nil
end

#active=(tab) ⇒ Object

Sets the active tab



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# File 'lib/salticid/interface/tab_view.rb', line 18

def active=(tab)
  @active = @tabs.index tab
  render
end

#add(tab) ⇒ Object Also known as: <<

Adds a tab (and switches to it by default)



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# File 'lib/salticid/interface/tab_view.rb', line 24

def add(tab)
  @tabs << tab
  @active = @tabs.size - 1
  render
end

#delete(tab) ⇒ Object

Deletes a tab and switches to the previous tab



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# File 'lib/salticid/interface/tab_view.rb', line 33

def delete(tab)
  @tabs.delete tab
  previous
end

#each(&block) ⇒ Object

Iterates over each tab



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# File 'lib/salticid/interface/tab_view.rb', line 39

def each(&block)
  @tabs.each &block
end

#next ⇒ Object

Advances to the next tab



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# File 'lib/salticid/interface/tab_view.rb', line 44

def next
  scroll 1
end

#previous ⇒ Object

Goes to the previous tab



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# File 'lib/salticid/interface/tab_view.rb', line 49

def previous
  scroll -1
end

#render ⇒ Object

Draws to screen



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# File 'lib/salticid/interface/tab_view.rb', line 54

def render
  return false if @tabs.empty?
  # Divide into regions

  # Ignore dividers
  width = @width - size + 1
  base_width = width / size
  regions = Array.new(size, base_width)
  
  # Add remainder to successive tabs.
  (width - base_width * size).times do |i|
    regions[i] += 1
  end

  # Move to start
  @window.setpos 0,0

  @tabs.each_with_index do |tab, i|
    if i > 0
      @window.addstr '|'
    end

    color = Interface::COLOR_PAIRS[tab.state]
    @window.color_set color if color
    @window.attron Curses::A_BOLD
    @window.attron Curses::A_REVERSE if i == @active
    @window.addstr tab.to_s.slice(0,regions[i]).center(regions[i])
    @window.attroff Curses::A_REVERSE if i == @active
    @window.attroff Curses::A_BOLD
    @window.color_set Interface::COLOR_PAIRS[:info]
  end

  @window.refresh
end

#resize(dimensions = nil) ⇒ Object 



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# File 'lib/salticid/interface/tab_view.rb', line 89

def resize(dimensions = nil)
  return unless super

  @tabs.each do |tab|
    tab.resize(
      :top => 1,
      :left => 0,
      :height => height - 1,
      :width => width
    )
  end
  active.render
end

#scroll(delta = 1) ⇒ Object

Moves by a number of tabs



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# File 'lib/salticid/interface/tab_view.rb', line 104

def scroll(delta = 1)
  active.hide rescue NoMethodError
  @active = (@active + delta).modulo(@tabs.size)
  active.show
  render
end

#shutdown ⇒ Object 



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# File 'lib/salticid/interface/tab_view.rb', line 111

def shutdown
  @tabs.each do |tab|
    tab.shutdown
  end
  @tabs = []
end

#size ⇒ Object

Number of tabs



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# File 'lib/salticid/interface/tab_view.rb', line 119

def size
  @tabs.size
end

#switch_to_label(label) ⇒ Object

Switches the active tab to the specified label



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# File 'lib/salticid/interface/tab_view.rb', line 124

def switch_to_label(label)
  if index = @tabs.map{ |tab| tab.to_s }.index(label)
    @active = index
    render
  else
    raise RuntimeError.new("no tab labeled #{label}")
  end
end