Class: CTioga2::Graphics::Styles::BoxStyle

Inherits:
StrokeStyle show all
Defined in:
lib/ctioga2/graphics/styles/box.rb

Overview

TODO:

Add rounded corners and the like…

This class represents styles attached to a box

Constant Summary

Constants inherited from BasicStyle

CTioga2::Graphics::Styles::BasicStyle::AllStyles, CTioga2::Graphics::Styles::BasicStyle::OldAttrAccessor

Instance Method Summary collapse

Methods inherited from StrokeStyle

#set_stroke_style

Methods inherited from LineStyle

#draw_line, #set_stroke_style

Methods inherited from BasicStyle

alias_for, aliases, attr_accessor, attribute_type, attribute_types, attributes, convert_string_hash, defined_aliases, deprecated_attribute, from_hash, inherited, #instance_variable_defined?, normalize_hash, normalize_in, normalize_out, options_hash, #set_from_hash, sub_style, sub_styles, #to_hash, typed_attribute, #update_from_other, #use_defaults_from

Constructor Details

#initialize ⇒ BoxStyle

Returns a new instance of BoxStyle.



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# File 'lib/ctioga2/graphics/styles/box.rb', line 49

def initialize
  @shape = :square
  @radius = Types::Dimension::new(:dy, 1.0)
end

Instance Method Details

#draw_box(t, x1, y1, x2, y2) ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/box.rb', line 93

def draw_box(t, x1, y1, x2, y2)
  t.context do
    t.discard_path

    ## @todo Rounded rects!
    if fill && fill.color
      fill.setup_fill(t)
      prepare_path(t, x1, y1, x2, y2)
      fill.do_fill(t)
    end
    if color
      set_stroke_style(t)
      prepare_path(t, x1, y1, x2, y2)
      t.stroke
    end
  end

end

#draw_box_around(t, x1, y1, x2, y2, dx, dy = nil) ⇒ Object

Draws a box around the given box, leaving dx and dy around. If dy is omitted, it defaults to dx



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# File 'lib/ctioga2/graphics/styles/box.rb', line 114

def draw_box_around(t, x1, y1, x2, y2, dx, dy = nil)
  dy ||= dx
  dx = dx.to_figure(t, :x)
  dy = dy.to_figure(t, :y)
  draw_box(t, x1 - dx, y1 + dy,
           x2 + dx, y2 - dy)
end

#prepare_path(t, x1, y1, x2, y2) ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/box.rb', line 54

def prepare_path(t, x1, y1, x2, y2)
  case @shape
  when :square
    t.append_rect_to_path(x1, y1, x2 - x1, y2 - y1)
  when :round
    dx = @radius.to_figure(t, :x)
    dy = @radius.to_figure(t, :y)

    xl = x1
    xr = x2
    xl,xr = xr, xl if xl > xr

    yt = y1
    yb = y2
    yb,yt = yt,yb if yb > yt
    
    t.move_to_point(xl, yt - dy)
    t.append_curve_to_path(xl, yt - 0.5 * dy, # First control point
                           xl + 0.5 * dx, yt, 
                           xl + dx, yt)
    t.append_point_to_path(xr - dx, yt)
    t.append_curve_to_path(xr - 0.5 * dx, yt,
                           xr, yt - 0.5 * dy, 
                           xr, yt - dy)

    t.append_point_to_path(xr, yb + dy)
    t.append_curve_to_path(xr, yb + 0.5 * dy, # First control point
                           xr - 0.5 * dx, yb, 
                           xr - dx, yb)
    t.append_point_to_path(xl + dx, yb)
    t.append_curve_to_path(xl + 0.5 * dx, yb, # First control point
                           xl, yb + 0.5 * dy, 
                           xl, yb + dy)
    t.close_path
  else
    raise "Unknown box shape: #{@shape}"
  end
end