Class: Glimmer::SWT::ColorProxy

Inherits:
Object
  • Object
show all
Defined in:
lib/glimmer/swt/color_proxy.rb

Overview

Proxy for org.eclipse.swt.graphics.Color

Invoking ‘#swt_color` returns the SWT Color object wrapped by this proxy

Follows the Proxy Design Pattern

Constant Summary collapse

SWT_COLOR_TRANSLATION = 
{
  "widget_foreground"                   => [0, 0, 0], 
  "blue"                                => [0, 0, 255], 
  "widget_dark_shadow"                  => [0, 0, 0], 
  "title_foreground"                    => [0, 0, 0], 
  "yellow"                              => [255, 255, 0], 
  "widget_highlight_shadow"             => [255, 255, 255], 
  "dark_cyan"                           => [0, 128, 128], 
  "list_foreground"                     => [0, 0, 0], 
  "dark_blue"                           => [0, 0, 128], 
  "dark_yellow"                         => [128, 128, 0], 
  "cyan"                                => [0, 255, 255], 
  "info_background"                     => [236, 235, 236], 
  "link_foreground"                     => [0, 104, 218], 
  "title_inactive_foreground"           => [0, 0, 0], 
  "title_background_gradient"           => [179, 215, 255], 
  "red"                                 => [255, 0, 0], 
  "title_inactive_background_gradient"  => [220, 220, 220], 
  "transparent"                         => [255, 255, 255], 
  "widget_light_shadow"                 => [232, 232, 232], 
  "dark_magenta"                        => [128, 0, 128], 
  "white"                               => [255, 255, 255], 
  "list_selection"                      => [179, 215, 255], 
  "gray"                                => [192, 192, 192], 
  "widget_border"                       => [0, 0, 0], 
  "widget_background"                   => [236, 236, 236], 
  "info_foreground"                     => [0, 0, 0], 
  "title_inactive_background"           => [220, 220, 220], 
  "widget_disabled_foreground"          => [220, 220, 220], 
  "list_background"                     => [255, 255, 255], 
  "magenta"                             => [255, 0, 255], 
  "title_background"                    => [0, 99, 225], 
  "text_disabled_background"            => [255, 255, 255], 
  "black"                               => [0, 0, 0], 
  "dark_gray"                           => [128, 128, 128], 
  "list_selection_text"                 => [0, 0, 0], 
  "dark_red"                            => [128, 0, 0], 
  "widget_normal_shadow"                => [159, 159, 159], 
  "dark_green"                          => [0, 128, 0], 
  "green"                               => [0, 255, 0]
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ ColorProxy

Initializes a proxy for an SWT Color object

Takes a standard color single argument, rgba 3 args, or rgba 4 args

A standard color is a string/symbol representing one of the SWT.COLOR_*** constants like SWT.COLOR_RED, but in underscored string format (e.g :color_red). Glimmer can also accept standard color names without the color_ prefix, and it will automatically figure out the SWT.COLOR_*** constant (e.g. :red)

rgb is 3 arguments representing Red, Green, Blue numeric values

rgba is 4 arguments representing Red, Green, Blue, and Alpha numeric values



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# File 'lib/glimmer/swt/color_proxy.rb', line 89

def initialize(*args)
  @args = args        
  case @args.size
  when 1
    @alpha = nil
    if @args.first.is_a?(String) || @args.first.is_a?(Symbol)              
      standard_color = @args.first.to_s.downcase.sub('COLOR_', '')             
      @red, @green, @blue = SWT_COLOR_TRANSLATION[standard_color]
    else
      @red, @green, @blue = [0, 0, 0]
    end
  when 3..4
    @red, @green, @blue, @alpha = @args
  end        
end

Instance Attribute Details

#alpha ⇒ Object (readonly)

Returns the value of attribute alpha.



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# File 'lib/glimmer/swt/color_proxy.rb', line 72

def alpha
  @alpha
end

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/glimmer/swt/color_proxy.rb', line 72

def args
  @args
end

#blue ⇒ Object (readonly)

Returns the value of attribute blue.



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# File 'lib/glimmer/swt/color_proxy.rb', line 72

def blue
  @blue
end

#green ⇒ Object (readonly)

Returns the value of attribute green.



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# File 'lib/glimmer/swt/color_proxy.rb', line 72

def green
  @green
end

#red ⇒ Object (readonly)

Returns the value of attribute red.



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# File 'lib/glimmer/swt/color_proxy.rb', line 72

def red
  @red
end

Instance Method Details

#alpha_css ⇒ Object 



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# File 'lib/glimmer/swt/color_proxy.rb', line 113

def alpha_css
  alpha.to_f / 255
end

#to_css ⇒ Object 



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# File 'lib/glimmer/swt/color_proxy.rb', line 105

def to_css
  if alpha.nil?
    "rgb(#{red}, #{green}, #{blue})"
  else
    "rgba(#{red}, #{green}, #{blue}, #{alpha_css})"
  end
end