Class: Magick::RVG::TextBase

Inherits:
Object
  • Object
show all
Includes:
Duplicatable, Stylable
Defined in:
lib/rvg/text.rb

Overview

Base class for Tspan, Tref and Text.

Direct Known Subclasses

Text, Tref, Tspan

Instance Method Summary collapse

Methods included from Duplicatable

#deep_copy

Methods included from Stylable

#styles

Instance Method Details

#add_primitives(gc) ⇒ Object

We do our own transformations.



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# File 'lib/rvg/text.rb', line 51

def add_primitives(gc) #:nodoc:
  return if !@text && @tspans.empty?

  gc.push
  x = cx + @dx
  y = cy + @dy
  if @rotation != 0
    gc.translate(x, y)
    gc.rotate(@rotation)
    gc.translate(-x, -y)
  end
  add_style_primitives(gc)
  if @text
    x2, y2 = gc.text(x, y, @text)
    self.cx = x + x2
    self.cy = y + y2
  end
  @tspans.each do |tspan|
    tspan.add_primitives(gc)
  end
  gc.pop
end

#d(x, y = 0) {|_self| ... } ⇒ Object

Add x and y to the current text position.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/rvg/text.rb', line 37

def d(x, y = 0)
  @dx, @dy = Magick::RVG.convert_to_float(x, y)
  yield(self) if block_given?
  self
end

#rotate(degrees) {|_self| ... } ⇒ Object

Rotate the text about the current text position.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/rvg/text.rb', line 44

def rotate(degrees)
  @rotation = Magick::RVG.convert_to_float(degrees)[0]
  yield(self) if block_given?
  self
end

#tspan(text, x = nil, y = nil) ⇒ Object

Create a new text chunk. Each chunk can have its own initial position and styles. If x and y are omitted the text starts at the current text position.



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# File 'lib/rvg/text.rb', line 29

def tspan(text, x = nil, y = nil)
  tspan = Tspan.new(text, x, y)
  tspan.parent = self
  @tspans << tspan
  tspan
end