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module Rubyvis
# Alias for Rubyvis::Wedge
def self.Wedge
Rubyvis::Wedge
end
class Wedge < Mark
def type
"wedge"
end
@properties=Mark.properties.dup
attr_accessor_dsl :start_angle, :end_angle, :angle, :inner_radius, :outer_radius, :line_width, [:stroke_style, lambda {|d| Rubyvis.color(d)}], [:fill_style, lambda {|d| Rubyvis.color(d)}]
def self.defaults
a=Rubyvis.Colors.category20()
Wedge.new.mark_extend(Mark.defaults).start_angle(lambda {s=self.sibling; s ? s.end_angle: -Math::PI.quo(2) } ).inner_radius( 0 ).line_width( 1.5 ).stroke_style( nil ).fill_style( lambda {a.scale(self.index)})
end
def mid_radius
(inner_radius+outer_radius) / 2.0
end
def mid_angle
(start_angle+end_angle) / 2.0
end
def anchor(name)
that=self
partial=lambda {|s| s.inner_radius!=0 ? true : s.angle < 2*Math::PI}
mid_radius=lambda {|s| (s.inner_radius+s.outer_radius) / 2.0}
mid_angle=lambda {|s| (s.start_angle+s.end_angle) / 2.0 }
mark_anchor(name).left(lambda {
s = self.scene.target[self.index];
if (partial.call(s))
case (self.name())
when "outer"
s.left + s.outer_radius * Math.cos(mid_angle.call(s))
when "inner"
s.left + s.inner_radius * Math.cos(mid_angle.call(s))
when "start"
s.left + mid_radius.call(s) * Math.cos(s.start_angle)
when "center"
s.left + mid_radius.call(s) * Math.cos(mid_angle.call(s))
when "end"
s.left + mid_radius.call(s) * Math.cos(s.end_angle)
else
s.left
end
else
s.left
end
}).top(lambda {
s = self.scene.target[self.index];
if (partial.call(s))
case (self.name())
when "outer"
s.top + s.outer_radius * Math.sin(mid_angle.call(s))
when "inner"
s.top + s.inner_radius * Math.sin(mid_angle.call(s))
when "start"
s.top + mid_radius.call(s) * Math.sin(s.start_angle)
when "center"
s.top + mid_radius.call(s) * Math.sin(mid_angle.call(s))
when "end"
s.top + mid_radius.call(s) * Math.sin(s.end_angle)
else
s.top
end
else
s.top
end
}).text_align(lambda {
s = self.scene.target[self.index];
if (partial.call(s))
case (self.name())
when 'outer'
that.upright(mid_angle.call(s)) ? 'right':'left'
when 'inner'
that.upright(mid_angle.call(s)) ? 'left':'right'
else
'center'
end
else
'center'
end
}).text_baseline(lambda {
s = self.scene.target[self.index];
if (partial.call(s))
case (self.name())
when 'start'
that.upright(s.start_angle) ? 'top':'bottom'
when 'end'
that.upright(s.end_angle) ? 'bottom':'top'
else
'middle'
end
else
'middle'
end
}).text_angle(lambda {
s = self.scene.target[self.index];
a=0
if (partial.call(s))
case (self.name())
when 'center'
a=mid_angle.call(s)
when 'inner'
a=mid_angle.call(s)
when 'outer'
a=mid_angle.call(s)
when 'start'
a=s.start_angle
when 'end'
a=s.end_angle
end
end
that.upright(a) ? a: (a+Math::PI)
})
end
def self.upright(angle)
angle=angle % (2*Math::PI)
angle=(angle<0) ? (2*Math::PI+angle) : angle
(angle < Math::PI/2.0) or (angle>=3*Math::PI / 2.0)
end
def upright(angle)
angle=angle % (2*Math::PI)
angle=(angle<0) ? (2*Math::PI+angle) : angle
(angle < Math::PI/2.0) or (angle>=3*Math::PI / 2.0)
end
def build_implied(s)
if s.angle.nil?
s.angle = s.end_angle - s.start_angle
elsif s.end_angle.nil?
s.end_angle = s.start_angle + s.angle
end
mark_build_implied(s)
end
end
end
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