Module: Cairo::Context::Rectangle

Included in:
Cairo::Context
Defined in:
lib/cairo/context/rectangle.rb

Instance Method Summary collapse

Instance Method Details

#rounded_rectangle(x, y, width, height, x_radius, y_radius = nil) ⇒ Object



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# File 'lib/cairo/context/rectangle.rb', line 4

def rounded_rectangle(x, y, width, height, x_radius, y_radius=nil)
  x1 = x
  x2 = x1 + width
  y1 = y
  y2 = y1 + height

  y_radius ||= x_radius

  x_radius = [x_radius, width / 2.0].min
  y_radius = [y_radius, height / 2.0].min

  xr1 = x_radius
  xr2 = x_radius / 2.0
  yr1 = y_radius
  yr2 = y_radius / 2.0

  move_to(x1 + xr1, y1)
  line_to(x2 - xr1, y1)
  curve_to(x2 - xr2, y1, x2, y1 + yr2, x2, y1 + yr1)
  line_to(x2, y2 - yr1)
  curve_to(x2, y2 - yr2, x2 - xr2, y2, x2 - xr1, y2)
  line_to(x1 + xr1, y2)
  curve_to(x1 + xr2, y2, x1, y2 - yr2, x1, y2 - yr1)
  line_to(x1, y1 + yr1)
  curve_to(x1, y1 + yr2, x1 + xr2, y1, x1 + xr1, y1)
  close_path
end