Class: GerbilCharts::Surfaces::GraphElement

Inherits:
Object
  • Object
show all
Defined in:
lib/gerbilcharts/surfaces/graph_element.rb

Overview

Graph - base for everything you place on the graph (all rectangular)

Constant Summary collapse

EXP_FIXED =

constants

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EXP_FILL = 
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ORIENT_NORTH =

orientations

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ORIENT_SOUTH = 
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ORIENT_EAST = 
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ORIENT_WEST = 
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ORIENT_NORTHEAST = 
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ORIENT_NORTHWEST = 
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ORIENT_SOUTHEAST = 
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ORIENT_SOUTHWEST = 
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ORIENT_OVERLAY = 
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Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opt = {}) ⇒ GraphElement

Returns a new instance of GraphElement.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 32

def initialize( opt={} )
    @lay_orient= opt[:orient] if defined? opt[:orient]
    @lay_expand= opt[:expand] if defined? opt[:expand]
    @lay_dimension= opt[:dim] if defined? opt[:dim]
    @bounds = Rect.new
    if opt[:width] and opt[:height]
      @bounds.from_wh(opt[:width],opt[:height]) 
    end
    if opt[:class]
      @class=opt[:class]
    end
    @group="default"
 @global_chart_options=opt
end

Instance Attribute Details

#bounds ⇒ Object (readonly)

Returns the value of attribute bounds.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 26

def bounds
  @bounds
end

#class ⇒ Object (readonly)

public ro attributes



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 24

def class
  @class
end

#group ⇒ Object (readonly)

Returns the value of attribute group.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 25

def group
  @group
end

#lay_dimension ⇒ Object (readonly)

Returns the value of attribute lay_dimension.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 29

def lay_dimension
  @lay_dimension
end

#lay_expand ⇒ Object (readonly)

Returns the value of attribute lay_expand.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 28

def lay_expand
  @lay_expand
end

#lay_orient ⇒ Object (readonly)

Returns the value of attribute lay_orient.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 27

def lay_orient
  @lay_orient
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 30

def parent
  @parent
end

Instance Method Details

#align_to_anchor(anc) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 126

def align_to_anchor(anc)
    case @lay_orient
    when ORIENT_SOUTH
          @bounds.left= anc.bounds.left
          @bounds.right=anc.bounds.right
    when ORIENT_NORTH
          @bounds.left= anc.bounds.left
          @bounds.right=anc.bounds.right
    when ORIENT_EAST
          @bounds.top= anc.bounds.top
          @bounds.bottom=anc.bounds.bottom
    when ORIENT_WEST
          @bounds.top= anc.bounds.top
          @bounds.bottom=anc.bounds.bottom
    when ORIENT_OVERLAY
          @bounds.initfrom anc.bounds
  end
end

#get_global_option(optsym, defval) ⇒ Object

query a global option, return the defval if option is not set



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 146

def get_global_option(optsym, defval)
@global_chart_options.has_key?(optsym)? @global_chart_options[optsym]: defval 
end

#isoverlay? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 59

def isoverlay?
  if defined? @lay_orient and @lay_orient == ORIENT_OVERLAY
    return true
  else
      return false
  end
end

#munch(layrect) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 93

def munch(layrect)
  raise "Element does not need to be laid out" if not needslayout?
  
  @bounds.initfrom(layrect)
  case @lay_orient
    when ORIENT_SOUTH
          @bounds.clip_b @lay_dimension
          layrect.crop_b @lay_dimension
    when ORIENT_NORTH
          @bounds.clip_t @lay_dimension
          layrect.crop_t @lay_dimension
    when ORIENT_EAST
          @bounds.clip_r @lay_dimension
          layrect.crop_r @lay_dimension
    when ORIENT_WEST
          @bounds.clip_l @lay_dimension
          layrect.crop_l @lay_dimension
    when ORIENT_SOUTHEAST
          @bounds.clip_b @lay_dimension
          @bounds.clip_r @lay_dimension
    when ORIENT_NORTHEAST
          @bounds.clip_t @lay_dimension
          @bounds.clip_r @lay_dimension
    when ORIENT_SOUTHWEST
          @bounds.clip_b @lay_dimension
          @bounds.clip_l @lay_dimension
    when ORIENT_NORTHWEST
          @bounds.clip_t @lay_dimension
          @bounds.clip_l @lay_dimension
  end
  return layrect
end

#needslayout? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 47

def needslayout?
  if @lay_orient 
    return true
  else
    return false
  end
end

#render(sdc) ⇒ Object

setup SVG group element and call int_render



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 82

def render(sdc)
    sdc.newwin(@group, { :class => @class } ) do |sdc|
    int_render(sdc)
 end
end

#render_direct(sdc) ⇒ Object

render direct - directly render SVG using builder for complex elements



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 89

def render_direct(sdc)
    raise "This Graph Element cannot render directly, incorrect usage"
end

#scale_x(val, range) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 67

def scale_x val,range
  return @bounds.left + @bounds.width * range.scale_factor(val)
end

#scale_y(val, range) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 71

def scale_y val,range
  return 0 if range.invalid?
  return @bounds.bottom - @bounds.height * range.scale_factor(val)
end

#setbounds(rcbounds) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 77

def setbounds rcbounds
  @bounds.initfrom rcbounds
end

#setparent(par) ⇒ Object 



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# File 'lib/gerbilcharts/surfaces/graph_element.rb', line 55

def setparent(par)
    @parent=par
end