Class: CTioga2::Graphics::Styles::PlotStyle

Inherits:
Object
  • Object
show all
Includes:
Log, Tioga::FigureConstants
Defined in:
lib/ctioga2/graphics/styles/plot.rb

Overview

The style of a Elements::Subplot object.

todo it should hold

  • labels

  • axes and edges (in a clean way !)

  • ticks

  • background (uniform fill + watermark if applicable + possibly a picture .?)

This class is way too complex and needs too much flexibility to be handled by a subclass of BasicStyle. However, all substyles should be.

Constant Summary collapse

@@current_index = 
0

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Log

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

Constructor Details

#initialize ⇒ PlotStyle

Returns a new instance of PlotStyle.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 85

def initialize
  # Default style for the plots.
  @axes = {}
  @axes[:left] = 
    StyleSheet.style_for(AxisStyle, 'left', :left, 
                         AXIS_WITH_TICKS_AND_NUMERIC_LABELS,
                         '$y$')
  @axes[:bottom] = 
    StyleSheet.style_for(AxisStyle, 'bottom', :bottom, 
                         AXIS_WITH_TICKS_AND_NUMERIC_LABELS,
                         '$x$')

  @axes[:right] = 
    StyleSheet.style_for(AxisStyle, 'right', :right, 
                         AXIS_WITH_TICKS_ONLY)
  @axes[:top] = 
    StyleSheet.style_for(AxisStyle, 'top', :top, 
                         AXIS_WITH_TICKS_ONLY)

  @xaxis_location = :bottom
  @yaxis_location = :left

  @title = 
    StyleSheet.style_for(TextLabel, 'title',
                         nil, 
                         Types::PlotLocation.new(:top))

  @plot_margin = nil

  @transforms = CoordinateTransforms.new

  @background = 
    StyleSheet.style_for(BackgroundStyle, 'background')

  # A padding of 6bp ? Why ?? Why not ?
  @padding = Types::Dimension.new(:bp, 6)


  
  @text_size_index = @@current_index
  @@current_index += 1

  # Automatic adjustment of text sizes...
  @text_sizes = TextSizeWatcher.new
  @text_sizes.watch("title-#{@text_size_index}")

  @text_auto_adjust = :both

end

Instance Attribute Details

#axes ⇒ Object

The various sides of the plot. A hash location -> AxisStyle.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 45

def axes
  @axes
end

#background ⇒ Object

Style of the background of the plot



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 65

def background
  @background
end

#lines_scale ⇒ Object

Scale of the lines of the plot. The plot is wrapped in a t.rescale_lines call.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 69

def lines_scale
  @lines_scale
end

#padding ⇒ Object

A padding around the box when automatic spacing is in auto mode. A Dimension.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 77

def padding
  @padding
end

#plot_margin ⇒ Object

A margin to be left around the data points



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 57

def plot_margin
  @plot_margin
end

#text_auto_adjust ⇒ Object

Mode for auto-adjust



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 80

def text_auto_adjust
  @text_auto_adjust
end

#text_scale ⇒ Object

Scale of the text of the plot. The plot is wrapped in a t.rescale_text call.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 73

def text_scale
  @text_scale
end

#title ⇒ Object

The title of the plot



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

def title
  @title
end

#transforms ⇒ Object

TODO:

they should be axis-specific.

Coordinate tranforms



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 62

def transforms
  @transforms
end

#xaxis_location ⇒ Object

The default location of the X axis (well, mainly, the X label)



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 48

def xaxis_location
  @xaxis_location
end

#yaxis_location ⇒ Object

The default location of the Y axis (well, mainly, the Y label)



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 51

def yaxis_location
  @yaxis_location
end

Class Method Details

.current_plot_style(plotmaker) ⇒ Object

Returns the PlotStyle object of the current plot



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 292

def self.current_plot_style(plotmaker)
  return plotmaker.root_object.current_plot.style
end

Instance Method Details

#apply_transforms!(dataset) ⇒ Object

Apply (destructively) the current transformations to the given dataset



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 137

def apply_transforms!(dataset)
  @transforms.transform_2d!(dataset)
end

#compute_margins(t, prev_margins) ⇒ Object

Computes the margins based on the text information.

This is very different from the one above, since this one relies on measured texts to get it right !



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 326

def compute_margins(t, prev_margins)
  margins = estimate_margins(t)
  if @text_auto_adjust == :old
    return margins
  else
    pad = if @padding
            @padding.to_bp(t)
          else
            4
          end
    nm =  @text_sizes.update_margins(t, prev_margins, pad)

    # We include the old margins, unless we have the :measure
    # text adjust mode
    if @text_auto_adjust != :measure
      nm.expand_to!(t, margins)
    end
    return nm
  end
end

#deep_copy ⇒ Object

Returns a deep copy of self, with all references stripped.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 287

def deep_copy
  return Marshal.load(Marshal.dump(self))
end

#draw_all_axes(t, bounds) ⇒ Object

Draws all axes for the plot. The bounds argument is that computed by Subplot#compute_boundaries; it is there to ensure that the axes know whether they have their own coordinate system or if they just follow what’s around.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 250

def draw_all_axes(t, bounds)
  for which, axis in @axes
    t.context do
      begin
        axis.set_bounds_for_axis(t, bounds[which])
        axis.draw_axis(t, @text_sizes)
      rescue Exception => e
        error { "Impossible to draw axis #{which}: #{e.message}" }
        debug { "Full message: #{e.inspect}\n#{e.backtrace.join("\n")}" }
      end
    end
  end
  # We draw the title last
  title.draw(t, 'title', "title-#{@text_size_index}")
end

#draw_all_background_lines(t) ⇒ Object

Draws all axes background lines for the plot.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 267

def draw_all_background_lines(t)
  for which, axis in @axes
    axis.draw_background_lines(t)
  end
end

#estimate_margins(t) ⇒ Object

Estimate the margins of the plot whose style this object controls. These margins are used when the plot margins are in automatic mode.

Returns a Types::MarginsBox



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 301

def estimate_margins(t)
  margins = [:left, :right, :top, :bottom].map do |side|
    exts = axes_for_side(side).map do |ax|
      ax.extension(t,self)
    end
    if @title.loc.is_side?(side)
      exts << @title.label_extension(t, 'title', @title.loc) * 
        (@text_scale || 1)
    end
    Types::Dimension.new(:dy, exts.max)
  end

  box = Types::MarginsBox.new(*margins)
  if @padding
    for dim in box.margins
      dim.replace_if_bigger(t, @padding)
    end
  end
  return box
end

#get_axis_key(name) ⇒ Object

Returns the key corresponding to the named axis. See #get_axis_style for more information; though ultimately the latter is using this function.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 197

def get_axis_key(name)
  if name =~ /^\s*([xy])(?:axis)?\s*$/i
    return self.send("#{$1.downcase}axis_location")
  else
    return clean_axis_name(name)
  end
end

#get_axis_style(name) ⇒ Object

Returns the AxisStyle corresponding to the named axis. name can be:

  • one of the named axes (ie, by default: top, left, right, bottom). All names are stripped from spaces around, and downcased (see #clean_axis_name). Can be also user-defined axes.

  • x(axis)?/y(axis)?, which returns the default object for the given location

todo Maybe x2 and y2 could be provided to signify “the side which isn’t the default” ?



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 184

def get_axis_style(name)
  style = @axes[get_axis_key(name)]
  if ! style
    ## @todo Type-safe exception here
    raise "Unkown named axis: '#{name}'"
  else
    return style
  end
end

#get_label_style(location) ⇒ Object

Returns a BaseTextStyle or similar for the given location. The location is of the form:

axis_name(_(ticks?|label))

or

title

If neither label nor ticks is specified in the first form, ticks are implied.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 220

def get_label_style(location)
  if location =~ /^\s*title\s*$/
    return @title
  end
  location =~ /^\s*(.*?)(?:_(ticks?|label))?\s*$/i
  which = $2
  axis = get_axis_style($1)
  if which =~ /label/
    return axis.axis_label
  else
    return axis.tick_label_style
  end
end

#set_axis_style(name, style) ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 205

def set_axis_style(name, style)
  key = get_axis_key(name)
  @axes[key] = style
end

#set_default_axis(which, name) ⇒ Object

Sets the axis which should be used for subsequent objects (for which no axis is specified) for the given plot



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 165

def set_default_axis(which, name)
  axis = get_axis_key(name)
  self.send("#{which}axis_location=", axis)
end

#set_label_style(which, hash, text = nil) ⇒ Object

Sets the style of the given label. Sets the text as well, if text is not nil



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 236

def set_label_style(which, hash, text = nil)
  style = get_label_style(which)
  hash = hash.merge({'text' => text}) unless text.nil?
  if hash.key?('text') and ! style.is_a?(TextLabel)
    CTioga2::Log::warn {"Text property of label #{which} was set, but this has no meaning: tick labels can't be set this way. Did you mean to use \"#{which}_label\"" + " instead ?" }
  end
  style.set_from_hash(hash)
end

#set_log_scale(which, val) ⇒ Object

Whether to use log scale for the given axis.

Now the question is: how should that affect user-defined axes ? It should not.

todo This really should move to Axis when transformations are handled correctly.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 148

def set_log_scale(which, val)
  case which
  when :x
    @axes[:top].log = val
    @axes[:bottom].log = val
    @transforms.x_log = val
  when :y
    @axes[:left].log = val
    @axes[:right].log = val
    @transforms.y_log = val
  else
    raise "Unknown axis: #{which.inspect}"
  end
end

#setup_figure_maker(t) ⇒ Object

Sets up the FigureMaker object for the plot. To be called just after the outermost context call for the concerned plot.



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# File 'lib/ctioga2/graphics/styles/plot.rb', line 276

def setup_figure_maker(t)
  if @lines_scale
    t.rescale_lines(@lines_scale)
  end
  if @text_scale
    t.rescale_text(@text_scale)
  end
end