Class: LessCurse::Screen

Inherits:
Object
  • Object
show all
Defined in:
lib/less_curse/screen.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/less_curse/screen.rb', line 11

def initialize
  # Need to initialize screen to access the terminal size
  FFI::NCurses.initscr

  height,width =  FFI::NCurses::getmaxyx(FFI::NCurses::stdscr)
  @size = LessCurse::Geometry::Size.new(width,height)
  @windows = {}
  @focused_widget = nil
  @grid    = LessCurse::Grid.new [[]]
  @popups  = {}
end

Instance Attribute Details

#focused_widget ⇒ Object

Returns the value of attribute focused_widget.



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# File 'lib/less_curse/screen.rb', line 6

def focused_widget
  @focused_widget
end

#footer ⇒ Object

Returns the value of attribute footer.



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# File 'lib/less_curse/screen.rb', line 8

def footer
  @footer
end

#grid ⇒ Object

Returns the value of attribute grid.



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# File 'lib/less_curse/screen.rb', line 3

def grid
  @grid
end

#header ⇒ Object

Returns the value of attribute header.



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# File 'lib/less_curse/screen.rb', line 7

def header
  @header
end

#popups ⇒ Object

Returns the value of attribute popups.



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# File 'lib/less_curse/screen.rb', line 9

def popups
  @popups
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/less_curse/screen.rb', line 5

def size
  @size
end

#windows ⇒ Object

Returns the value of attribute windows.



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# File 'lib/less_curse/screen.rb', line 4

def windows
  @windows
end

Instance Method Details

#add(widget_or_grid) ⇒ Object 



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# File 'lib/less_curse/screen.rb', line 23

def add widget_or_grid
  if widget_or_grid.is_a? LessCurse::Grid
    @grid = widget_or_grid
  else
    @grid.add widget_or_grid
  end
  recalc_window_sizes
end

#focus_next ⇒ Object

Focus next element in #widgets



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# File 'lib/less_curse/screen.rb', line 89

def focus_next
  cycle_focus(+1)
end

#focus_previous ⇒ Object

Focus next element in #widgets



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# File 'lib/less_curse/screen.rb', line 94

def focus_previous
  cycle_focus(-1)
end

#repaint ⇒ Object

Repaint the screen and all contained widgets



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# File 'lib/less_curse/screen.rb', line 50

def repaint
  FFI::NCurses.refresh

  # 'Draw' header and/or footer
  if @header && !@header.empty?
    FFI::NCurses::mvaddstr 0, 0, @header
  end
  if @footer && !@footer.empty?
    FFI::NCurses::mvaddstr @size.height - 1, 0, @footer
  end

  # Let all Widgets redraw themselfes
  widgets.each  do |widget|
    window = @windows[widget]
    FFI::NCurses.wclear   window
    widget.draw           window
    FFI::NCurses.wrefresh window
  end

  @popups.each do |popup, window|
    FFI::NCurses.wclear   window
    popup.draw            window
    FFI::NCurses.wrefresh window
  end
end

#show ⇒ Object 



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# File 'lib/less_curse/screen.rb', line 36

def show
  @focused_widget = widgets.first
  @focused_widget.focus if @focused_widget
  # Note that FFI::NCurses.initscr is called in initialize
  FFI::NCurses.cbreak # can ctrl-c, not waiting for newlines to end input.
  #FFI::NCurses.raw    # TODO this overrides cbreak ... 
  FFI::NCurses.noecho # do not echo input in win.
  FFI::NCurses.keypad FFI::NCurses::stdscr, true # recognize KEY_UP etc.
  FFI::NCurses.clear
  FFI::NCurses.refresh
  repaint
end

#show_popup(type = :info, content = 'Popup') ⇒ Object 



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# File 'lib/less_curse/screen.rb', line 76

def show_popup type=:info, content='Popup'
  # Lets take up quarter of screen and draw a boxed window
  popup_widget = LessCurse::Widgets::Button.new title: content.to_s
  popup_widget.focus = true
  area = LessCurse::Geometry::Rectangle.new @size.width / 4,
    @size.height / 4,
    @size.width  / 2,
    @size.height / 2

  @popups[popup_widget] = LessCurse.window area
end

#widgets ⇒ Object 



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# File 'lib/less_curse/screen.rb', line 32

def widgets
  @grid.widgets
end