The methods in this module describe the user-coordinate space. RVG and Pattern objects are stretchable.
Describe a user coordinate system to be imposed on the viewbox. The arguments must be numbers and the width and height arguments must be positive.
# File lib/rvg/stretchable.rb, line 137 def viewbox(x, y, width, height) begin @vbx_x = Float(x) @vbx_y = Float(y) @vbx_width = Float(width) @vbx_height = Float(height) rescue ArgumentError raise ArgumentError, "arguments must be convertable to float (got #{x.class}, #{y.class}, #{width.class}, #{height.class})" end raise(ArgumentError, "viewbox width must be > 0 (#{width} given)") unless width >= 0 raise(ArgumentError, "viewbox height must be > 0 (#{height} given)") unless height >= 0 # return the user-coordinate space attributes if defined class << self if not defined? @redefined then @redefined = true define_method(:x) { @vbx_x } define_method(:y) { @vbx_y } define_method(:width) { @vbx_width} define_method(:height) { @vbx_height } end end yield(self) if block_given? self end
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