Class: StdDraw

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

Constant Summary collapse

@@pen_radius = 
DEFAULT_PEN_RADIUS = 0.002
@@coords = 
StandardDrawTk::Coordinates.new
@@color = 
'black'
@@bg_color = 
'white'
@@root = 
TkRoot.new
@@canvas = 
TkCanvas.new(@@root) do
  height @@coords.height
  width @@coords.width
  bg @@bg_color
end
@@thread = 
Thread.new do
  Tk.mainloop
end

Class Method Summary collapse

Class Method Details

.arc(x, y, radius, angle1, angle2) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 58

def self.arc(x, y, radius, angle1, angle2)
  throw 'arc radius must be nonnegative' if radius < 0
  while angle2 < angle1
    angle2 += 360
  end
  xs = coords.scale_x(x)
  ys = coords.scale_y(y)
  ws = coords.factor_x(2*radius)
  hs = coords.factor_y(2*radius)
  if ws <= 1 && hs <= 1
    pixel(x, y)
  else
    x1 = xs - ws/2
    y1 = ys - hs/2
    x2 = x1 + ws
    y2 = y1 + hs
    TkcArc.new(@@canvas, x1, y1, x2, y2, style: :arc, start: angle1, extent: angle2 - angle1, fill: color, width: scaled_pen_radius, outline: color)
  end
end

.circle(x, y, radius) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 78

def self.circle(x, y, radius)
  draw_circle(x, y, radius, outline: color)
end

.color ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 46

def self.color
  @@color
end

.coords ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 25

def self.coords
  @@coords
end

.ellipse(x, y, w, h) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 82

def self.ellipse(x, y, w, h)
  draw_ellipse(x, y, w, h, outline: color)
end

.filled_circle(x, y, radius) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 90

def self.filled_circle(x, y, radius)
  draw_circle(x, y, radius, fill: color)
end

.filled_ellipse(x, y, w, h) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 86

def self.filled_ellipse(x, y, w, h)
  draw_ellipse(x, y, w, h, fill: color)
end

.filled_polygon(x, y) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 128

def self.filled_polygon(x, y)
  draw_polygon(x, y, fill: color)
end

.filled_rectangle(x, y, half_width, half_height) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 98

def self.filled_rectangle(x, y, half_width, half_height)
  draw_rectangle(x, y, half_width, half_height, fill: color)
end

.filled_square(x, y, half_length) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 106

def self.filled_square(x, y, half_length)
  draw_rectangle(x, y, half_length, half_length, fill: color)
end

.line(x0, y0, x1, y1) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 50

def self.line(x0, y0, x1, y1)
  x0 = coords.scale_x(x0)
  y0 = coords.scale_y(y0)
  x1 = coords.scale_x(x1)
  y1 = coords.scale_y(y1)
  TkcLine.new(@@canvas, x0, y0, x1, y1, width: scaled_pen_radius, fill: color)
end

.pause ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 120

def self.pause
  @@thread.join
end

.pen_color=(color) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 42

def self.pen_color=(color)
  @@color = color
end

.pen_radius=(radius) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 37

def self.pen_radius=(radius)
  throw 'pen radius must be nonnegative' if radius <= 0
  @@pen_radius = radius
end

.pixel(x, y) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 114

def self.pixel(x, y)
  x1 = coords.scale_x(x).round
  y1 = coords.scale_y(y).round
  TkcRectangle.new(@@canvas, [x1, y1, x1 + 1, y1 + 1], outline: color, fill: color)
end

.point(x, y) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 110

def self.point(x, y)
  draw_circle(x, y, @@pen_radius/2, outline: color, fill: color)
end

.polygon(x, y) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 124

def self.polygon(x, y)
  draw_polygon(x, y, outline: color)
end

.rectangle(x, y, half_width, half_height) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 94

def self.rectangle(x, y, half_width, half_height)
  draw_rectangle(x, y, half_width, half_height, outline: color)
end

.set_xscale(min, max) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 29

def self.set_xscale(min,max)
  coords.set_xscale(min,max)
end

.set_yscale(min, max) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 33

def self.set_yscale(min,max)
  coords.set_yscale(min,max)
end

.square(x, y, half_length) ⇒ Object 



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# File 'lib/standard_draw_tk.rb', line 102

def self.square(x, y, half_length)
  draw_rectangle(x, y, half_length, half_length, outline: color)
end