Class: CTioga2::Graphics::Elements::XYZContour

Inherits:
PlotBasedElement show all
Includes:
Log, Dobjects
Defined in:
lib/ctioga2/graphics/elements/xyz-contour.rb

Overview

This class displays a XYZ element using contour lines.

Constant Summary

Constants inherited from TiogaElement

TiogaElement::StyleBaseOptions

Instance Attribute Summary collapse

Attributes inherited from PlotBasedElement

#dataset

Attributes inherited from TiogaElement

#clipped, #depth, #hidden, #location, #object_classes, #object_id, #object_parent, #parent

Instance Method Summary collapse

Methods included from Log

context, counts, debug, error, fatal, #format_exception, #identify, info, init_logger, log_to, logger, set_level, #spawn, warn

Methods inherited from PlotBasedElement

#clipped, #depth, #location

Methods inherited from TiogaElement

all_styles, base_style, #check_styled, define_style, #do, find_object, find_objects, #get_style, #has_style?, inherited, #inspect, register_object, register_style, #setup_style, #style_class, style_class, style_name, #style_name, styled_classes, #update_style

Constructor Details

#initialize(dataset, style = nil) ⇒ XYZContour

Creates a new XYZContour object with the given dataset and style.

Lots of code in common with XYZMap



47
48
49
50
51
 
# File 'lib/ctioga2/graphics/elements/xyz-contour.rb', line 47

def initialize(dataset, style = nil)
  @dataset = dataset
  @curve_style = style
  prepare_data
end

Instance Attribute Details

#curve_style ⇒ Object

A Styles::CurveStyle object saying how the curve should be drawn.

Some of the elements will be overridden.



36
37
38
 
# File 'lib/ctioga2/graphics/elements/xyz-contour.rb', line 36

def curve_style
  @curve_style
end

#table ⇒ Object

The IndexedTable object representing the underlying data



39
40
41
 
# File 'lib/ctioga2/graphics/elements/xyz-contour.rb', line 39

def table
  @table
end

Instance Method Details

#get_boundaries ⇒ Object

Returns the Types::Boundaries of this curve.



62
63
64
 
# File 'lib/ctioga2/graphics/elements/xyz-contour.rb', line 62

def get_boundaries
  return @table.xy_boundaries
end

#real_do(t) ⇒ Object

Actually draws the curve



68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/ctioga2/graphics/elements/xyz-contour.rb', line 68

def real_do(t)
  debug { "Plotting curve #{inspect}" }
  t.context do
    # Of course, there are still quite a few things to do
    # ;-)...

    # Ideas: for leaving things out, I may have to use min_gt
    # along with masking.

    ## @todo handle non-homogeneous XY maps.
    
    @curve_style.color_map ||= 
      Styles::ColorMap.from_text("Red--Green")
    
    if @curve_style.zaxis
      begin
        @parent.style.get_axis_style(@curve_style.zaxis).
          set_color_map(@curve_style.color_map, 
                        @table.table.min,
                        @table.table.max)
      rescue
        error { "Could not set Z info to non-existent axis #{@curve_style.zaxis}" }
      end
    end

    # Computation of equally spaced level lines
    nb = 20

    zmin = @table.table.min
    zmax = @table.table.max

    t.context do
      @curve_style.line.set_stroke_style(t)
      @curve_style.contour.plot_contours(t, table,
                                         zmin, zmax,
                                         @curve_style.color_map)
    end

  end
end