Class: Ccharts::Settings::HeatSettings

Inherits:
Object
  • Object
show all
Defined in:
lib/ccharts/settings.rb

Overview

heatmap

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HeatSettings

Returns a new instance of HeatSettings.



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# File 'lib/ccharts/settings.rb', line 284

def initialize
  @low = nil
  @high = nil
  @mid = nil
  @bg = nil
  @row_labels = nil
  @col_labels = nil
  @show_labels = false
  @plain = false
end

Instance Method Details

#background(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 298

def background(v); @bg = v; self; end

#col_labels(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 300

def col_labels(v); @col_labels = v; self; end

#high_color(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 296

def high_color(v); @high = v; self; end

#label_ptr_array(labels, keep) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 304

def label_ptr_array(labels, keep)
  return Fiddle::NULL if labels.nil? || labels.empty?
  ptrs = labels.map do |l|
    p = FFI.cstr(l)
    keep << p
    p.to_i
  end
  Fiddle::Pointer[ptrs.pack("Q*")]
end

#low_color(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 295

def low_color(v); @low = v; self; end

#mid_color(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 297

def mid_color(v); @mid = v; self; end

#plain(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 302

def plain(v); @plain = !!v; self; end

#row_labels(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 299

def row_labels(v); @row_labels = v; self; end

#show_labels(v) ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 301

def show_labels(v); @show_labels = !!v; self; end

#to_ffi ⇒ Object 



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# File 'lib/ccharts/settings.rb', line 314

def to_ffi
  s = FFI::HeatSettings.malloc
  keep = []
  set = lambda do |field, val|
    p = FFI.color_ptr(val, @plain)
    keep << p
    s[field] = p.to_i
  end
  set.call(:low_color, @low)
  set.call(:high_color, @high)
  set.call(:mid_color, @mid)
  set.call(:bg_color, @bg)
  s[:row_labels] = label_ptr_array(@row_labels, keep).to_i
  s[:col_labels] = label_ptr_array(@col_labels, keep).to_i
  s[:show_labels] = @show_labels ? 1 : 0
  [s, keep]
end