add some experimentation with jfreecharts in SWT.

jfc_test/ts_chart_demo.rb

@@ -0,0 +1,133 @@
+require 'java'
+require 'swt/swt_wrapper'
+require 'jfreechart/jfreechart_wrapper'
+
+puts "Starting demo!"
+
+class TimeSeriesExample
+
+  def initialize
+    # A Display is the connection between SWT and the native GUI. (jruby-swt-cookbook/apidocs/org/eclipse/swt/widgets/Display.html)
+    display = Swt::Widgets::Display.get_current
+
+    # A Shell is a window in SWT parlance. (jruby-swt-cookbook/apidocs/org/eclipse/swt/widgets/Shell.html)
+    @shell = Swt::Widgets::Shell.new
+
+    # A Shell must have a layout. FillLayout is the simplest.
+    layout = Swt::Layout::FillLayout.new
+    @shell.setLayout(layout)
+
+    # create a jfreechart!
+    chart = create_chart(create_dataset)
+    frame = Jfree::Experimental::Chart::Swt::ChartComposite.new(@shell, Swt::SWT::NONE, chart, true);
+    frame.setDisplayToolTips(true);
+    frame.setHorizontalAxisTrace(false);
+    frame.setVerticalAxisTrace(false);
+
+    @shell.setSize(1000, 500);
+    @shell.setText("Time series demo for jfreechart running with SWT");
+
+    # This lays out the widgets in the Shell
+    #@shell.pack
+
+    # And this displays the Shell
+    @shell.open
+  end
+
+  def create_chart(dataset)
+    chart = Jfree::Chart::ChartFactory.createTimeSeriesChart(
+        "Legal & General Unit Trust Prices",  # title
+        "Date",             # x-axis label
+        "Price Per Unit",   # y-axis label
+        dataset,            # data
+        true,               # create legend?
+        true,               # generate tooltips?
+        false               # generate URLs?
+    );
+
+    chart.setBackgroundPaint(java.awt.Color.white);
+
+    plot = chart.getPlot();
+    plot.setBackgroundPaint(java.awt.Color.lightGray);
+    plot.setDomainGridlinePaint(java.awt.Color.white);
+    plot.setRangeGridlinePaint(java.awt.Color.white);
+    plot.setAxisOffset(Jfree::Ui::RectangleInsets.new(5.0, 5.0, 5.0, 5.0));
+    plot.setDomainCrosshairVisible(true);
+    plot.setRangeCrosshairVisible(true);
+
+    renderer = plot.getRenderer();
+    renderer.setBaseShapesVisible(true);
+    renderer.setBaseShapesFilled(true);
+
+    axis = plot.getDomainAxis();
+    axis.setDateFormatOverride(java.text.SimpleDateFormat.new("MMM-yyyy"));
+
+    chart
+  end
+
+  def create_dataset
+    s1 = Jfree::Data::Time::TimeSeries.new("L&G European Index Trust")
+    s1.add(Jfree::Data::Time::Month.new(2, 2001), 181.8)
+    s1.add(Jfree::Data::Time::Month.new(3, 2001), 167.3)
+    s1.add(Jfree::Data::Time::Month.new(4, 2001), 153.8)
+    s1.add(Jfree::Data::Time::Month.new(5, 2001), 167.6)
+    s1.add(Jfree::Data::Time::Month.new(6, 2001), 158.8)
+    s1.add(Jfree::Data::Time::Month.new(7, 2001), 148.3)
+    s1.add(Jfree::Data::Time::Month.new(8, 2001), 153.9)
+    s1.add(Jfree::Data::Time::Month.new(9, 2001), 142.7)
+    s1.add(Jfree::Data::Time::Month.new(10, 2001), 123.2)
+    s1.add(Jfree::Data::Time::Month.new(11, 2001), 131.8)
+    s1.add(Jfree::Data::Time::Month.new(12, 2001), 139.6)
+    s1.add(Jfree::Data::Time::Month.new(1, 2002), 142.9)
+    s1.add(Jfree::Data::Time::Month.new(2, 2002), 138.7)
+    s1.add(Jfree::Data::Time::Month.new(3, 2002), 137.3)
+    s1.add(Jfree::Data::Time::Month.new(4, 2002), 143.9)
+    s1.add(Jfree::Data::Time::Month.new(5, 2002), 139.8)
+    s1.add(Jfree::Data::Time::Month.new(6, 2002), 137.0)
+    s1.add(Jfree::Data::Time::Month.new(7, 2002), 132.8)
+
+    s2 = Jfree::Data::Time::TimeSeries.new("L&G UK Index Trust")
+    s2.add(Jfree::Data::Time::Month.new(2, 2001), 129.6)
+    s2.add(Jfree::Data::Time::Month.new(3, 2001), 123.2)
+    s2.add(Jfree::Data::Time::Month.new(4, 2001), 117.2)
+    s2.add(Jfree::Data::Time::Month.new(5, 2001), 124.1)
+    s2.add(Jfree::Data::Time::Month.new(6, 2001), 122.6)
+    s2.add(Jfree::Data::Time::Month.new(7, 2001), 119.2)
+    s2.add(Jfree::Data::Time::Month.new(8, 2001), 116.5)
+    s2.add(Jfree::Data::Time::Month.new(9, 2001), 112.7)
+    s2.add(Jfree::Data::Time::Month.new(10, 2001), 101.5)
+    s2.add(Jfree::Data::Time::Month.new(11, 2001), 106.1)
+    s2.add(Jfree::Data::Time::Month.new(12, 2001), 110.3)
+    s2.add(Jfree::Data::Time::Month.new(1, 2002), 111.7)
+    s2.add(Jfree::Data::Time::Month.new(2, 2002), 111.0)
+    s2.add(Jfree::Data::Time::Month.new(3, 2002), 109.6)
+    s2.add(Jfree::Data::Time::Month.new(4, 2002), 113.2)
+    s2.add(Jfree::Data::Time::Month.new(5, 2002), 111.6)
+    s2.add(Jfree::Data::Time::Month.new(6, 2002), 108.8)
+    s2.add(Jfree::Data::Time::Month.new(7, 2002), 101.6)
+
+    dataset = Jfree::Data::Time::TimeSeriesCollection.new
+    dataset.addSeries(s1)
+    dataset.addSeries(s2)
+
+    dataset
+  end
+
+  # This is the main gui event loop
+  def start
+    display = Swt::Widgets::Display.get_current
+
+    # until the window (the Shell) has been closed
+    while !@shell.isDisposed
+      # check for and dispatch new gui events
+      display.sleep unless display.read_and_dispatch
+    end
+    display.dispose
+  end
+end
+
+Swt::Widgets::Display.set_app_name "Timeseries Example"
+
+app = TimeSeriesExample.new
+app.start
+exit

jfreechart/jfreechart_wrapper.rb

@@ -0,0 +1,66 @@
+require 'java'
+require 'swt/swt_wrapper'
+
+module Jfree
+
+  def self.jars
+    [
+      'jcommon-1.0.16',
+      'swtgraphics2d',
+      'jfreechart-1.0.13',
+      'jfreechart-1.0.13-swt',
+      'jfreechart-1.0.13-experimental',
+      'iText-2.1.5'
+    ]
+  end
+
+  Jfree.jars.each do |jar|
+    path = File.expand_path(File.dirname(__FILE__) + "/../jfreechart/" + jar)
+    if File.exist?(path + ".jar")
+      puts "loading #{jar}"
+      require path
+    else
+      raise "jar file required: #{path}.jar"
+    end
+  end
+
+  module Chart
+    import org.jfree.chart.ChartFactory
+    import org.jfree.chart.JFreeChart
+    module Axis
+      import org.jfree.chart.axis.DateAxis
+    end
+    module Plot
+      import org.jfree.chart.plot.XYPlot
+    end
+    module Renderer
+      module Xy
+        import org.jfree.chart.renderer.xy.XYItemRenderer
+        import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer
+      end
+    end
+  end
+
+  module Data
+    module Time
+      import org.jfree.data.time.Month
+      import org.jfree.data.time.TimeSeries
+      import org.jfree.data.time.TimeSeriesCollection
+    end
+    module Xy
+      import org.jfree.data.xy.XYDataset
+    end
+  end
+
+  module Experimental
+    module Chart
+      module Swt
+        import org.jfree.experimental.chart.swt.ChartComposite
+      end
+    end
+  end
+
+  module Ui
+    import org.jfree.ui.RectangleInsets
+  end
+end