Class: Termplot::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/termplot/renderer.rb

Defined Under Namespace

Classes: Border, Point, Tick

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cols: 80, rows: 20, debug: false) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/termplot/renderer.rb', line 11

def initialize(cols: 80, rows: 20, debug: false)
  # Default border size, right border allocation will change dynamically as
  # data comes in to account for the length of the numbers to be printed in
  # the axis ticks
  @border_size = default_border_size
  @cols = cols > min_cols ? cols : min_cols
  @rows = rows > min_rows ? rows : min_rows
  @window = Window.new(cols: @cols, rows: @rows)
  @decimals = 2
  @tick_spacing = 3
  @debug = debug
  @errors = []
end

Instance Attribute Details

#cols ⇒ Object (readonly)

Returns the value of attribute cols.



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# File 'lib/termplot/renderer.rb', line 9

def cols
  @cols
end

#rows ⇒ Object (readonly)

Returns the value of attribute rows.



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# File 'lib/termplot/renderer.rb', line 9

def rows
  @rows
end

Instance Method Details

#inner_width ⇒ Object 



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# File 'lib/termplot/renderer.rb', line 59

def inner_width
  cols -  border_size.left - border_size.right
end

#render(series) ⇒ Object 



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# File 'lib/termplot/renderer.rb', line 25

def render(series)
  window.clear
  errors.clear

  # Calculate width of right hand axis
  calculate_axis_size(series)

  # Points
  points = build_points(series)
  render_points(series, points)
  window.cursor.reset_position

  # Title bar
  render_title(series)
  window.cursor.reset_position

  # Borders
  render_borders
  window.cursor.reset_position

  # Draw axis
  ticks = build_ticks(points)
  render_axis(ticks)

  # Flush window to screen
  debug? ?
    window.flush_debug :
    window.flush

  if errors.any?
    window.print_errors(errors)
  end
end