/usr/lib/ruby/vendor_ruby/ctioga2/graphics/generator.rb is in ctioga2 0.10-1.
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# copyright (c) 2009 by Vincent Fourmond
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details (in the COPYING file).
require 'ctioga2/utils'
require 'ctioga2/log'
require 'ctioga2/graphics/coordinates'
require 'ctioga2/graphics/styles/base'
require 'ctioga2/graphics/styles/plot-types'
module CTioga2
module Graphics
# This class is in charge of generating Elements::TiogaElement,
# such as Elements::Curve2D, from a dataset. It takes care of
# generating the appropriate style and of transforming the
# coordinates.
class CurveGenerator
# A Styles::CurveStyleFactory object that handles the
# styles for every single curve that will be drawn.
attr_accessor :style_factory
# The provider of legends, a Legends::LegendProvider
# object.
attr_accessor :legend_provider
# The current kind of generated. It is a symbol
attr_accessor :current_curves
# Information used for the various curve types. They are not
# strictly speaking curve styles or would simply clutter the
# overall curve styles with many meaningless
# parameters/options. They therefore belong here.
# A ParametricPlotStyle object handling the style of the
# parametric plots.
attr_accessor :xy_parametric_parameters
# Style of histograms
attr_accessor :histogram_parameters
# Creates a CurveGenerator object.
def initialize
@legend_provider = Legends::LegendProvider.new
@style_factory = Styles::CurveStyleFactory.new
@current_curves = :xy_plot
@xy_parametric_parameters = Styles::ParametricPlotStyle.new
@histogram_parameters = Styles::HistogramStyle.new
end
PlotOptions = {
'bypass-transforms' => CmdArg.new('boolean')
}
# Creates a Elements::TiogaElement representing the _dataset_
# and returns it.
#
# \todo
# * other kinds of coordinate transformations
# * other kinds of curves (pseudo-3D, surfaces, histograms...)
def curve_from_dataset(plot, dataset, options = {})
# Does coordinate transforms first ?
# @todo copy datasets here rather than overwriting them !
# -> this should be an option !
if ! options['bypass-transforms']
plot.style.apply_transforms!(dataset)
end
# Now, we trim options unrelated to the plotting
options.delete_if { |k,v|
! Graphics::Styles::
CurveStyleFactory::PlotCommandOptions.key?(k)
}
begin
legend = @legend_provider.dataset_legend(dataset)
style = @style_factory.next(options)
style.legend ||= legend # The legend specified as option to
# the --plot command has precedence
# over the one specified by
# --legend.
curve = send(@current_curves, dataset, style)
curve.curve_style.target = curve
end
return curve
end
private
## \name Available kinds of curves
##
## @{
# The "classical" 2D plots.
def xy_plot(dataset, style)
return Graphics::Elements::Curve2D.new(dataset, style)
end
# The "classical" 2D plots.
def histogram(dataset, style)
return Graphics::Elements::Histogram.new(dataset, style,
@histogram_parameters.dup)
end
# XYZ plots formerly known as "parametric plots"
def xy_parametric(dataset, style)
return Graphics::Elements::Parametric2D.
new(dataset, style, @xy_parametric_parameters.dup)
end
# XYZ maps
def xyz_map(dataset, style)
style.legend = false # No legend for XYZ maps
return Graphics::Elements::XYZMap.new(dataset, style)
end
# XYZ maps
def xyz_contour(dataset, style)
style.legend = false # No legend for XYZ contours
return Graphics::Elements::XYZContour.new(dataset, style)
end
## @}
end
# The group for chosing plot types.
PlotTypesGroup =
CmdGroup.new('plot-types',
"Switch between different kinds of plots",
"How to switch between different kinds of plot types", 01)
XYParametricPlotCommand =
Cmd.new("xy-parametric",nil,"--xy-parametric",
[], Styles::ParametricPlotStyle.options_hash) do |plotmaker, opts|
plotmaker.curve_generator.current_curves = :xy_parametric
plotmaker.curve_generator.
xy_parametric_parameters.set_from_hash(opts)
end
XYParametricPlotCommand.describe('select XY parametric plots',
<<EOH, PlotTypesGroup)
Switch to XY parametric plots, that is standard XY plots whose appearance
(such as color, marker color, and, potentially, marker kinds and more)
are governed by one (or more ?) Z values.
EOH
HistogramPlotCommand =
Cmd.new("histogram",nil,"--histogram",
[], Styles::HistogramStyle.options_hash) do |plotmaker, opts|
plotmaker.curve_generator.current_curves = :histogram
plotmaker.curve_generator.
histogram_parameters.set_from_hash(opts)
end
HistogramPlotCommand.describe('select histogram plots',
<<EOH, PlotTypesGroup)
Switch to drawing histograms.
EOH
ContourPlotCommand =
Cmd.new("contour",nil,"--contour") do |plotmaker|
plotmaker.curve_generator.current_curves = :xyz_contour
end
ContourPlotCommand.describe('select contour plots',
<<EOH, PlotTypesGroup)
Switch to contour plots for later curves. Contour plots need three
columns (X,Y,Z). They have major and minor lines.
EOH
XYPlotCommand =
Cmd.new("xy-plot",nil,"--xy-plot") do |plotmaker|
plotmaker.curve_generator.current_curves = :xy_plot
end
XYPlotCommand.describe('select XY plots',
<<EOH, PlotTypesGroup)
Switch (back) to standard XY plots (ctioga\'s default)
EOH
XYZMapCommand =
Cmd.new("xyz-map",nil,"--xyz-map") do |plotmaker|
plotmaker.curve_generator.current_curves = :xyz_map
end
XYZMapCommand.describe('select XYZ maps',
<<EOH, PlotTypesGroup)
Switch to XYZ maps, ie plots where the color at a XY location is given by
its Z value.
EOH
end
end
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