updates for 0.9.4

2009-10-10 13:13:32 +00:00 · 2009-10-10 13:13:32 +00:00 · 4dff922640
commit 4dff922640
parent 88139aadac
32 changed files with 446 additions and 191 deletions
--- a/.classpath
+++ b/.classpath
@ -7,10 +7,6 @@
 	<classpathentry kind="lib" path="/home/sampo/Projects/OpenRocket/lib/miglayout15-swing.jar"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.USER_LIBRARY/JCommon 1.0.16"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.USER_LIBRARY/JFreeChart 1.0.13"/>
-	<classpathentry kind="lib" path="lib-test/hamcrest-core-1.1.jar"/>
-	<classpathentry kind="lib" path="lib-test/hamcrest-library-1.1.jar"/>
-	<classpathentry kind="lib" path="lib-test/jmock-2.5.1.jar"/>
-	<classpathentry kind="lib" path="lib-test/jmock-junit4-2.5.1.jar"/>
 	<classpathentry kind="lib" path="lib-extra/RXTXcomm.jar"/>
 	<classpathentry kind="lib" path="lib-test/junit-4.7.jar"/>
 	<classpathentry kind="output" path="bin"/>
--- a/6
+++ b/6
@ -1,3 +1,9 @@
+2009-10-10  Sampo Niskanen
+
+	* Removed non-ASCII characters from source code files
+	* Created Chars class for non-ASCII characters
+	* Added styrofoam materials
+
 2009-10-04  Sampo Niskanen

 	* [BUG] Fixed too high configuration dialogs
--- a/4
+++ b/4
@ -10,18 +10,17 @@ Must-have:

 Bugs:

- Simulation plot dialog forces dialog one button row too high (All/None)
 - Unit tests fail from ant script


 Maybe:

- Windows executable wrapper (launch4j)
 - Inform user about software updates


 Postponed:

+- Windows executable wrapper (launch4j)
 - Allow only one instance of OpenRocket running (RMI communication)
 - Only schedule rocket figure update instead of each time updating it
 - Reading (writing) .RKT format
@ -79,4 +78,5 @@ In 0.9.4:
 - JTree text is cropped unnecessarily
 - Allow editing user-defined materials
 - [BUG] All configuration dialogs too high
+- Simulation plot dialog forces dialog one button row too high (All/None)

--- a/build.xml
+++ b/build.xml
@ -90,7 +90,7 @@
 			<fileset dir="." includes="*">
 				<type type="file"/>
 			</fileset>
-			<fileset dir="." includes="datafiles/ lib/ pix/ src/ test/"/>
+			<fileset dir="." includes="datafiles/ lib/ lib-test/ pix/ src/ test/"/>
 		</copy>
 		<zip destfile="${dist.src}" basedir="${build.dir}" includes="${pkgname}/"/>
 		<delete dir="${build.dir}/${pkgname}"/>
@ -115,7 +115,7 @@
 	
 	
 	<!-- DIST-BIN -->
-	<target name="dist-bin" depends="checktodo,clean,unittest,jar">
+	<target name="dist-bin" depends="check,clean,unittest,jar">
 		<move file="${jar.file}" tofile="${dist.bin}"/>
 	</target>

@ -126,6 +126,9 @@
 	</target>
 	
 	
+	<!-- CHECK -->
+	<target name="check" depends="checktodo,checkascii"/>
+	
 	<!-- CHECK TODOs -->
 	<target name="checktodo">
 		<tempfile property="todo.file" prefix="checktodo-"/>
@ -134,6 +137,9 @@
 			<fileset dir="${src.dir}">
 			    <include name="**/*.java"/>
 			</fileset>
+			<fileset dir="${src-test.dir}">
+			    <include name="**/*.java"/>
+			</fileset>
 			<filterchain>
 				<linecontainsregexp>
 					<regexp pattern="TODO:.*CRITICAL"/>
@ -148,6 +154,31 @@ ${criticaltodos}</fail>
 	</target>
 	
 	
+	<!-- CHECK TODOs -->
+	<target name="checkascii">
+		<tempfile property="ascii.file" prefix="checkascii-"/>
+		<echo>Checking project for non-ASCII characters.</echo>
+		<concat destfile="${ascii.file}">
+			<fileset dir="${src.dir}">
+			    <include name="**/*.java"/>
+			</fileset>
+			<fileset dir="${src-test.dir}">
+			    <include name="**/*.java"/>
+			</fileset>
+			<filterchain>
+				<linecontainsregexp>
+					<regexp pattern="\P{ASCII}"/>
+				</linecontainsregexp>
+			</filterchain>
+		</concat>
+		<loadfile srcfile="${ascii.file}" property="nonascii"/>
+		<delete file="${ascii.file}"/>
+		<fail if="nonascii">Non-ASCII characters exist in project:
+${nonascii}</fail>
+		<echo>No non-ASCII characters in project.</echo>
+	</target>
+	
+	
 	<!--  Unit tests  -->
 	<target name="unittest" description="Execute unit tests" depends="build">
 		<echo>Building unit tests</echo>
@ -156,7 +187,7 @@ ${criticaltodos}</fail>
 		
 		<echo>Running unit tests</echo>
 		<mkdir dir="tmp/rawtestoutput"/>
-		<junit printsummary="true" failureproperty="junit.failure">
+		<junit fork="yes" forkmode="once" printsummary="true" failureproperty="junit.failure">
 			<classpath>
 				<path refid="test-classpath"/>
 				<path location="${basedir}"/>
@ -164,6 +195,7 @@ ${criticaltodos}</fail>
 			<batchtest todir="tmp/rawtestoutput">
 				<fileset dir="${build-test.dir}">
 					<include name="**/*Test*.class" />
+					<exclude name="**/*$*.class" />
 					<exclude name="Test.class" />
 				</fileset>
 				<formatter type="xml"/>
@ -173,7 +205,10 @@ ${criticaltodos}</fail>
 			<fileset dir="tmp/rawtestoutput"/>
 			<report todir="tmp/test-reports"/>
 		</junitreport>
-		<fail if="junit.failure" message="Unit test(s) failed.  See reports!"/>
+		<fail if="junit.failure" message="Unit test(s) failed.  See report in ${basedir}/tmp/test-reports/index.html"/>
+		<echo>
+	Unit tests passed successfully.
+		</echo>
 	</target>
    
 </project>
--- a/lib-test/hamcrest-core-1.1.jar
+++ b/lib-test/hamcrest-core-1.1.jar
--- a/lib-test/hamcrest-library-1.1.jar
+++ b/lib-test/hamcrest-library-1.1.jar
--- a/lib-test/jmock-2.5.1.jar
+++ b/lib-test/jmock-2.5.1.jar
--- a/lib-test/jmock-junit4-2.5.1.jar
+++ b/lib-test/jmock-junit4-2.5.1.jar
--- a/src/net/sf/openrocket/database/Databases.java
+++ b/src/net/sf/openrocket/database/Databases.java
@ -79,7 +79,7 @@ public class Databases {
 		BULK_MATERIAL.add(new Material.Bulk("Cardboard",	 680, false));
 		BULK_MATERIAL.add(new Material.Bulk("Carbon fiber",	1780, false));
 		BULK_MATERIAL.add(new Material.Bulk("Cork",			 240, false));
-		BULK_MATERIAL.add(new Material.Bulk("Depron",		  40, false));
+		BULK_MATERIAL.add(new Material.Bulk("Depron (XPS)",	  40, false));
 		BULK_MATERIAL.add(new Material.Bulk("Fiberglass",	1850, false));
 		BULK_MATERIAL.add(new Material.Bulk("Kraft phenolic",950, false));
 		BULK_MATERIAL.add(new Material.Bulk("Maple",		 755, false));
@ -90,7 +90,8 @@ public class Databases {
 		BULK_MATERIAL.add(new Material.Bulk("Polystyrene",  1050, false));
 		BULK_MATERIAL.add(new Material.Bulk("PVC",			1390, false));
 		BULK_MATERIAL.add(new Material.Bulk("Spruce",		 450, false));
-		// TODO: CRITICAL: Add styrofoam
+		BULK_MATERIAL.add(new Material.Bulk("Styrofoam generic (EPS)", 20, false));
+		BULK_MATERIAL.add(new Material.Bulk("Styrofoam / Blue Foam (XPS)", 32, false));
 		BULK_MATERIAL.add(new Material.Bulk("Quantum tubing",1050, false));
 		
 		SURFACE_MATERIAL.add(new Material.Surface("Ripstop nylon",			0.067, false));
--- a/src/net/sf/openrocket/gui/components/DescriptionArea.java
+++ b/src/net/sf/openrocket/gui/components/DescriptionArea.java
@ -13,11 +13,15 @@ public class DescriptionArea extends JScrollPane {

 	private final JEditorPane editorPane;
 	
+
 	public DescriptionArea(int rows) {
-		this(rows, -1);
+		this("", rows, -1);
+	}
+	public DescriptionArea(int rows, float size) {
+		this("", rows, size);
 	}
 	
-	public DescriptionArea(int rows, float size) {
+	public DescriptionArea(String text, int rows, float size) {
 		super(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
 				ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
 		
@ -41,6 +45,7 @@ public class DescriptionArea extends JScrollPane {
 		this.setPreferredSize(dim);
 		
 		this.setViewportView(editorPane);
+		this.setText(text);
 	}
 	
 	public void setText(String txt) {
--- a/src/net/sf/openrocket/gui/dialogs/AboutDialog.java
+++ b/src/net/sf/openrocket/gui/dialogs/AboutDialog.java
@ -12,6 +12,7 @@ import javax.swing.JPanel;
 import net.miginfocom.swing.MigLayout;
 import net.sf.openrocket.gui.components.StyledLabel;
 import net.sf.openrocket.gui.components.URLLabel;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.GUIUtil;
 import net.sf.openrocket.util.Icons;
 import net.sf.openrocket.util.Prefs;
@ -42,7 +43,7 @@ public class AboutDialog extends JDialog {
 			panel.add(new StyledLabel(" ", -1), "ax 50%, growy, wrap para");
 		}
 		
-		panel.add(new StyledLabel("Copyright \u00A9 2007-2009 Sampo Niskanen"), 
+		panel.add(new StyledLabel("Copyright " + Chars.COPY +" 2007-2009 Sampo Niskanen"), 
 				"ax 50%, growy, wrap para");
 		
 		panel.add(new URLLabel(OPENROCKET_URL), "ax 50%, growy, wrap para");
--- a/src/net/sf/openrocket/gui/dialogs/ComponentAnalysisDialog.java
+++ b/src/net/sf/openrocket/gui/dialogs/ComponentAnalysisDialog.java
@ -1,6 +1,7 @@
 package net.sf.openrocket.gui.dialogs;

 import static net.sf.openrocket.unit.Unit.NOUNIT2;
+import static net.sf.openrocket.util.Chars.ALPHA;

 import java.awt.Color;
 import java.awt.Component;
@ -45,8 +46,8 @@ import net.sf.openrocket.gui.adaptors.ColumnTableModel;
 import net.sf.openrocket.gui.adaptors.DoubleModel;
 import net.sf.openrocket.gui.adaptors.MotorConfigurationModel;
 import net.sf.openrocket.gui.components.BasicSlider;
-import net.sf.openrocket.gui.components.StyledLabel;
 import net.sf.openrocket.gui.components.StageSelector;
+import net.sf.openrocket.gui.components.StyledLabel;
 import net.sf.openrocket.gui.components.UnitSelector;
 import net.sf.openrocket.gui.scalefigure.RocketPanel;
 import net.sf.openrocket.rocketcomponent.Configuration;
@ -203,7 +204,7 @@ public class ComponentAnalysisDialog extends JDialog implements ChangeListener {
 						return unit.toString(cpData.get(row).cp.x);
 					}
 				},
-				new Column("<html>C<sub>N<sub>\u03b1</sub></sub>") {
+				new Column("<html>C<sub>N<sub>"+ALPHA+"</sub></sub>") {
 					@Override public Object getValueAt(int row) {
 						return NOUNIT2.toString(cpData.get(row).cp.weight);
 					}
--- a/src/net/sf/openrocket/gui/dialogs/EditMotorConfigurationDialog.java
+++ b/src/net/sf/openrocket/gui/dialogs/EditMotorConfigurationDialog.java
@ -31,6 +31,7 @@ import net.sf.openrocket.motor.Motor;
 import net.sf.openrocket.rocketcomponent.MotorMount;
 import net.sf.openrocket.rocketcomponent.Rocket;
 import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.GUIUtil;

 public class EditMotorConfigurationDialog extends JDialog {
@ -466,7 +467,7 @@ public class EditMotorConfigurationDialog extends JDialog {
 			String str = motor.getDesignation(mount.getMotorDelay(id)); 
 			int count = mount.getMotorCount();
 			if (count > 1) {
-				str = "" + count + "\u00d7 " + str;
+				str = "" + count + Chars.TIMES + " " + str;
 			}
 			return str;
 		}
@ -482,15 +483,11 @@ public class EditMotorConfigurationDialog extends JDialog {
 			String name = mount.toString();
 			int count = mount.getMotorCount();
 			if (count > 1) {
-				name = name + " (\u00d7" + count + ")";
+				name = name + " (" + Chars.TIMES + count + ")";
 			}
 			return name;
 		}
 		
-		
 	}
-
-	
-	
 	
 }
--- a/src/net/sf/openrocket/gui/dialogs/UpdateInfoDialog.java
+++ b/src/net/sf/openrocket/gui/dialogs/UpdateInfoDialog.java
@ -14,6 +14,7 @@ import javax.swing.JPanel;
 import net.miginfocom.swing.MigLayout;
 import net.sf.openrocket.communication.UpdateInfo;
 import net.sf.openrocket.gui.components.URLLabel;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.ComparablePair;
 import net.sf.openrocket.util.GUIUtil;
 import net.sf.openrocket.util.Icons;
@ -45,7 +46,8 @@ public class UpdateInfoDialog extends JDialog {
 				if (count >= 4 && n != updates.get(i).getU())
 					break;
 				n = updates.get(i).getU();
-				panel.add(new JLabel("   \u2022 " + updates.get(i).getV()), "wrap 0px");
+				panel.add(new JLabel("   " + Chars.BULLET + " " + updates.get(i).getV()), 
+						"wrap 0px");
 				count++;
 			}
 		}
--- a/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java
+++ b/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java
@ -12,14 +12,21 @@ import java.util.List;
 import javax.swing.AbstractListModel;
 import javax.swing.ComboBoxModel;
 import javax.swing.JButton;
+import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
 import javax.swing.JDialog;
 import javax.swing.JLabel;
+import javax.swing.JOptionPane;
 import javax.swing.JPanel;
+import javax.swing.JProgressBar;
 import javax.swing.JTabbedPane;
+import javax.swing.Timer;

 import net.miginfocom.swing.MigLayout;
+import net.sf.openrocket.communication.UpdateInfo;
+import net.sf.openrocket.communication.UpdateInfoRetriever;
 import net.sf.openrocket.gui.components.StyledLabel;
+import net.sf.openrocket.gui.dialogs.UpdateInfoDialog;
 import net.sf.openrocket.unit.Unit;
 import net.sf.openrocket.unit.UnitGroup;
 import net.sf.openrocket.util.GUIUtil;
@ -40,7 +47,7 @@ public class PreferencesDialog extends JDialog {

 		tabbedPane.addTab("Units", null, unitsPane(), "Default units");
 		tabbedPane.addTab("Materials", null, new MaterialEditPanel(), "Custom materials");
-		tabbedPane.addTab("Confirmation", null, confirmationPane(), "Confirmation dialog settings");
+		tabbedPane.addTab("Options", null, optionsPane(), "Miscellaneous options");
 		
 		
 		JButton close = new JButton("Close");
@ -68,16 +75,39 @@ public class PreferencesDialog extends JDialog {
 	}
 	
 	
-	private JPanel confirmationPane() {
-		JPanel panel = new JPanel(new MigLayout("fill"));
+	private JPanel optionsPane() {
+		JPanel panel = new JPanel(new MigLayout("fillx, ins 30lp n n n"));
 		
-		panel.add(new JLabel("Position to insert new body components:"));
+		
+		panel.add(new JLabel("Position to insert new body components:"), "gapright para");
 		panel.add(new JComboBox(new PrefChoiseSelector(Prefs.BODY_COMPONENT_INSERT_POSITION_KEY,
-				"Always ask", "Insert in middle", "Add to end")), "wrap para, sg combos");
+				"Always ask", "Insert in middle", "Add to end")), "wrap para, growx, sg combos");
 		
 		panel.add(new JLabel("Confirm deletion of simulations:"));
 		panel.add(new JComboBox(new PrefBooleanSelector(Prefs.CONFIRM_DELETE_SIMULATION,
-				"Delete", "Confirm", true)), "wrap para, sg combos");
+				"Delete", "Confirm", true)), "wrap 40lp, growx, sg combos");
+		
+		
+		final JCheckBox softwareUpdateBox = new JCheckBox("Check for software updates");
+		softwareUpdateBox.setSelected(Prefs.getCheckUpdates());
+		softwareUpdateBox.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				Prefs.setCheckUpdates(softwareUpdateBox.isSelected());
+			}
+		});
+		panel.add(softwareUpdateBox);
+		
+		JButton button = new JButton("Check now");
+		button.setToolTipText("Check for software updates now");
+		button.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				checkForUpdates();
+			}
+		});
+		panel.add(button, "right, wrap");
+		
 		
 		return panel;
 	}
@ -350,6 +380,73 @@ public class PreferencesDialog extends JDialog {
 	}
 	
 	
+	private void checkForUpdates() {
+		final UpdateInfoRetriever retriever = new UpdateInfoRetriever();
+		retriever.start();
+		
+		
+		// Progress dialog
+		final JDialog dialog = new JDialog(this, ModalityType.APPLICATION_MODAL);
+		JPanel panel = new JPanel(new MigLayout());
+		
+		panel.add(new JLabel("Checking for updates..."), "wrap");
+		
+		JProgressBar bar = new JProgressBar();
+		bar.setIndeterminate(true);
+		panel.add(bar, "growx, wrap para");
+		
+		JButton cancel = new JButton("Cancel");
+		cancel.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				dialog.dispose();
+			}
+		});
+		panel.add(cancel, "right");
+		dialog.add(panel);
+		
+		GUIUtil.setDisposableDialogOptions(dialog, cancel);
+		
+		
+		// Timer to monitor progress
+		final Timer timer = new Timer(100, null);
+		final long startTime = System.currentTimeMillis();
+
+		ActionListener listener = new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				if (!retriever.isRunning() || startTime+10000 < System.currentTimeMillis()) {
+					timer.stop();
+					dialog.dispose();
+				}
+			}
+		};
+		timer.addActionListener(listener);
+		timer.start();
+		
+		
+		// Wait for action
+		dialog.setVisible(true);
+		
+		
+		// Check result
+		UpdateInfo info = retriever.getUpdateInfo();
+		if (info == null) {
+			JOptionPane.showMessageDialog(this, 
+					"An error occurred while communicating with the server.", 
+					"Unable to retrieve update information", JOptionPane.WARNING_MESSAGE, null);
+		} else if (info.getLatestVersion() == null || 
+				info.getLatestVersion().equals("") ||
+				Prefs.getVersion().equalsIgnoreCase(info.getLatestVersion())) {
+			JOptionPane.showMessageDialog(this, 
+					"You are running the latest version of OpenRocket.", 
+					"No updates available", JOptionPane.INFORMATION_MESSAGE, null);
+		} else {
+			new UpdateInfoDialog(info).setVisible(true);
+		}
+		
+	}
+	
 	
 	////////  Singleton implementation  ////////
 	
--- a/src/net/sf/openrocket/gui/figureelements/RocketInfo.java
+++ b/src/net/sf/openrocket/gui/figureelements/RocketInfo.java
@ -1,5 +1,7 @@
 package net.sf.openrocket.gui.figureelements;

+import static net.sf.openrocket.util.Chars.*;
+
 import java.awt.Color;
 import java.awt.Font;
 import java.awt.Graphics2D;
@ -16,7 +18,6 @@ import net.sf.openrocket.util.MathUtil;
 import net.sf.openrocket.util.Prefs;


-
 /**
 * A <code>FigureElement</code> that draws text at different positions in the figure
 * with general data about the rocket.
@ -166,10 +167,10 @@ public class RocketInfo implements FigureElement {
 		
 		at = "at M="+UnitGroup.UNITS_COEFFICIENT.getDefaultUnit().toStringUnit(mach);
 		if (!Double.isNaN(aoa)) {
-			at += " \u03b1=" + UnitGroup.UNITS_ANGLE.getDefaultUnit().toStringUnit(aoa);
+			at += " "+ALPHA+"=" + UnitGroup.UNITS_ANGLE.getDefaultUnit().toStringUnit(aoa);
 		}
 		if (!Double.isNaN(theta)) {
-			at += " \u0398=" + UnitGroup.UNITS_ANGLE.getDefaultUnit().toStringUnit(theta);
+			at += " "+THETA+"=" + UnitGroup.UNITS_ANGLE.getDefaultUnit().toStringUnit(theta);
 		}
 		
 		GlyphVector cgValue = createText(
--- a/src/net/sf/openrocket/gui/main/BasicFrame.java
+++ b/src/net/sf/openrocket/gui/main/BasicFrame.java
@ -1248,9 +1248,15 @@ public class BasicFrame extends JFrame {
 			public void actionPerformed(ActionEvent e) {
 				if (!updateInfo.isRunning()) {
 					timer.stop();
+					
+					String current = Prefs.getVersion();
+					String last = Prefs.getString(Prefs.LAST_UPDATE, "");

 					UpdateInfo info = updateInfo.getUpdateInfo();
-					if (info != null && !Prefs.getVersion().equals(info.getLatestVersion())) {
+					if (info != null && info.getLatestVersion() != null &&
+							!current.equals(info.getLatestVersion()) &&
+							!last.equals(info.getLatestVersion())) {
+						Prefs.putString(Prefs.LAST_UPDATE, info.getLatestVersion());
 						new UpdateInfoDialog(info).setVisible(true);
 					}
 				}
--- a/src/net/sf/openrocket/gui/main/SimulationEditDialog.java
+++ b/src/net/sf/openrocket/gui/main/SimulationEditDialog.java
@ -42,7 +42,7 @@ import net.sf.openrocket.gui.components.SimulationExportPanel;
 import net.sf.openrocket.gui.components.UnitSelector;
 import net.sf.openrocket.gui.plot.Axis;
 import net.sf.openrocket.gui.plot.PlotConfiguration;
-import net.sf.openrocket.gui.plot.PlotPanel;
+import net.sf.openrocket.gui.plot.SimulationPlotPanel;
 import net.sf.openrocket.rocketcomponent.Configuration;
 import net.sf.openrocket.simulation.FlightData;
 import net.sf.openrocket.simulation.FlightDataBranch;
@ -52,6 +52,7 @@ import net.sf.openrocket.simulation.SimulationListener;
 import net.sf.openrocket.simulation.listeners.CSVSaveListener;
 import net.sf.openrocket.unit.Unit;
 import net.sf.openrocket.unit.UnitGroup;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.GUIUtil;
 import net.sf.openrocket.util.Icons;
 import net.sf.openrocket.util.Prefs;
@ -393,7 +394,7 @@ public class SimulationEditDialog extends JDialog {
 		spin.setToolTipText(tip);
 		sub.add(spin,"w 65lp!");
 		
-		label = new JLabel("\u00b0 N");
+		label = new JLabel(Chars.DEGREE + " N");
 		label.setToolTipText(tip);
 		sub.add(label,"growx");
 		slider = new BasicSlider(m.getSliderModel(-90, 90));
@ -745,7 +746,7 @@ public class SimulationEditDialog extends JDialog {
 		
 		
 		if (true)
-			return new PlotPanel(simulation);
+			return new SimulationPlotPanel(simulation);
 		
 		JPanel panel = new JPanel(new MigLayout("fill"));
 		
--- a/src/net/sf/openrocket/gui/plot/SimulationPlotPanel.java
+++ b/src/net/sf/openrocket/gui/plot/SimulationPlotPanel.java
@ -7,6 +7,7 @@ import java.awt.event.ItemListener;
 import java.util.Arrays;
 import java.util.EnumSet;

+import javax.swing.BorderFactory;
 import javax.swing.JButton;
 import javax.swing.JComboBox;
 import javax.swing.JLabel;
@ -21,7 +22,7 @@ import javax.swing.table.TableColumnModel;

 import net.miginfocom.swing.MigLayout;
 import net.sf.openrocket.document.Simulation;
-import net.sf.openrocket.gui.components.StyledLabel;
+import net.sf.openrocket.gui.components.DescriptionArea;
 import net.sf.openrocket.gui.components.UnitSelector;
 import net.sf.openrocket.simulation.FlightDataBranch;
 import net.sf.openrocket.simulation.FlightEvent;
@ -31,7 +32,7 @@ import net.sf.openrocket.util.GUIUtil;
 import net.sf.openrocket.util.Icons;
 import net.sf.openrocket.util.Pair;

-public class PlotPanel extends JPanel {
+public class SimulationPlotPanel extends JPanel {
 	
 	// TODO: LOW: Should these be somewhere else?
 	public static final int AUTO = -1;
@ -82,7 +83,7 @@ public class PlotPanel extends JPanel {
 	private int modifying = 0;
 	

-	public PlotPanel(final Simulation simulation) {
+	public SimulationPlotPanel(final Simulation simulation) {
 		super(new MigLayout("fill"));
 		
 		this.simulation = simulation;
@ -121,7 +122,7 @@ public class PlotPanel extends JPanel {
 			}
 		});
 		this.add(new JLabel("Preset plot configurations: "), "spanx, split");
-		this.add(configurationSelector,"growx, wrap 30lp");
+		this.add(configurationSelector,"growx, wrap 20lp");

 		
 		
@ -160,9 +161,10 @@ public class PlotPanel extends JPanel {
 		this.add(domainUnitSelector, "width 40lp, gapright para");
 		
 		
-		StyledLabel desc = new StyledLabel("<html><p>The data will be plotted in time order " +
-				"even if the X axis type is not time.", -2);
-		this.add(desc, "width :0px:, growx, wrap para");
+		DescriptionArea desc = new DescriptionArea("The data will be plotted in time order " +
+				"even if the X axis type is not time.", 2, -2f);
+		desc.setViewportBorder(BorderFactory.createEmptyBorder());
+		this.add(desc, "width 1px, growx 1, wrap unrel");
 		
 		
 		
@ -192,7 +194,7 @@ public class PlotPanel extends JPanel {
 		col0.setPreferredWidth(w);
 		col0.setMaxWidth(w);
 		table.addMouseListener(new GUIUtil.BooleanTableClickListener(table));
-		this.add(new JScrollPane(table), "height 1px, width 200lp, grow 1, wrap rel");
+		this.add(new JScrollPane(table), "height 10px, width 200lp, grow 1, wrap rel");
 		
 		
 		////  All + None buttons
@ -226,7 +228,7 @@ public class PlotPanel extends JPanel {
 			@Override
 			public void actionPerformed(ActionEvent e) {
 				if (configuration.getTypeCount() >= 15) {
-					JOptionPane.showMessageDialog(PlotPanel.this, 
+					JOptionPane.showMessageDialog(SimulationPlotPanel.this, 
 							"A maximum of 15 plots is allowed.", "Cannot add plot", 
 							JOptionPane.ERROR_MESSAGE);
 					return;
@ -274,7 +276,7 @@ public class PlotPanel extends JPanel {
 			@Override
 			public void actionPerformed(ActionEvent e) {
 				defaultConfiguration = configuration.clone();
-				PlotDialog.showPlot(SwingUtilities.getWindowAncestor(PlotPanel.this), 
+				PlotDialog.showPlot(SwingUtilities.getWindowAncestor(SimulationPlotPanel.this), 
 						simulation, configuration);
 			}
 		});
--- a/src/net/sf/openrocket/gui/scalefigure/RocketPanel.java
+++ b/src/net/sf/openrocket/gui/scalefigure/RocketPanel.java
@ -59,6 +59,7 @@ import net.sf.openrocket.simulation.listeners.ApogeeEndListener;
 import net.sf.openrocket.simulation.listeners.InterruptListener;
 import net.sf.openrocket.unit.UnitGroup;
 import net.sf.openrocket.util.ChangeSource;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.Coordinate;
 import net.sf.openrocket.util.MathUtil;
 import net.sf.openrocket.util.Prefs;
@ -222,7 +223,7 @@ public class RocketPanel extends JPanel implements TreeSelectionListener, Change
 		
 		// Add rotation slider
 		// Minimum size to fit "360deg"
-		JLabel l = new JLabel("360\u00b0");
+		JLabel l = new JLabel("360" + Chars.DEGREE);
 		Dimension d = l.getPreferredSize();
 		
 		add(new BasicSlider(theta.getSliderModel(0,2*Math.PI),JSlider.VERTICAL,true),
--- a/src/net/sf/openrocket/rocketcomponent/Rocket.java
+++ b/src/net/sf/openrocket/rocketcomponent/Rocket.java
@ -13,6 +13,7 @@ import javax.swing.event.ChangeListener;
 import javax.swing.event.EventListenerList;

 import net.sf.openrocket.motor.Motor;
+import net.sf.openrocket.util.Chars;
 import net.sf.openrocket.util.Coordinate;
 import net.sf.openrocket.util.MathUtil;

@ -694,7 +695,7 @@ public class Rocket extends RocketComponent {
 					if (previous != null) {
 						String s = "";
 						if (count > 1) {
-							s = "" + count + "\u00d7" + previous;
+							s = "" + count + Chars.TIMES + previous;
 						} else {
 							s = previous;
 						}
@ -713,7 +714,7 @@ public class Rocket extends RocketComponent {
 			if (previous != null) {
 				String s = "";
 				if (count > 1) {
-					s = "" + count + "\u00d7" + previous;
+					s = "" + count + Chars.TIMES + previous;
 				} else {
 					s = previous;
 				}
--- a/src/net/sf/openrocket/rocketcomponent/Transition.java
+++ b/src/net/sf/openrocket/rocketcomponent/Transition.java
@ -1,9 +1,8 @@
 package net.sf.openrocket.rocketcomponent;

-import static java.lang.Math.sin;
-import static java.lang.Math.sqrt;
-import static net.sf.openrocket.util.MathUtil.pow2;
-import static net.sf.openrocket.util.MathUtil.pow3;
+import static java.lang.Math.*;
+import static net.sf.openrocket.util.Chars.*;
+import static net.sf.openrocket.util.MathUtil.*;

 import java.util.Collection;

@ -594,14 +593,14 @@ public class Transition extends SymmetricComponent {
 				"<i>Radius</i>&nbsp;&times;&nbsp;(<i>x</i>&nbsp;/&nbsp;<i>Length</i>)" +
 				"<sup><i>k</i></sup> "+
 				"where <i>k</i> is the shape parameter.  For <i>k</i>=0.5 this is a "+
-				"<b>½-power</b> or <b>parabolic</b> nose cone, for <i>k</i>=0.75 a "+
-				"<b>¾-power</b>, and for <i>k</i>=1 a <b>conical</b> nose cone.",
+				"<b>" + FRAC12 +"-power</b> or <b>parabolic</b> nose cone, for <i>k</i>=0.75 a "+
+				"<b>" + FRAC34 +"-power</b>, and for <i>k</i>=1 a <b>conical</b> nose cone.",
 				"A power series transition has a profile of "+
 				"<i>Radius</i>&nbsp;&times;&nbsp;(<i>x</i>&nbsp;/&nbsp;<i>Length</i>)" +
 				"<sup><i>k</i></sup> "+
 				"where <i>k</i> is the shape parameter.  For <i>k</i>=0.5 the transition is "+
-				"<b>½-power</b> or <b>parabolic</b>, for <i>k</i>=0.75 a <b>¾-power</b>, and for " +
-				"<i>k</i>=1 <b>conical</b>.",true) {
+				"<b>" + FRAC12 + "-power</b> or <b>parabolic</b>, for <i>k</i>=0.75 a " +
+				"<b>" + FRAC34 + "-power</b>, and for <i>k</i>=1 <b>conical</b>.",true) {
 			@Override
 			public boolean usesParameter() {  // Range 0...1
 				return true;
--- a/src/net/sf/openrocket/unit/DegreeUnit.java
+++ b/src/net/sf/openrocket/unit/DegreeUnit.java
@ -2,10 +2,12 @@ package net.sf.openrocket.unit;

 import java.text.DecimalFormat;

+import net.sf.openrocket.util.Chars;
+
 public class DegreeUnit extends GeneralUnit {

 	public DegreeUnit() {
-		super(Math.PI/180.0,"\u00b0");
+		super(Math.PI/180.0, ""+Chars.DEGREE);
 	}

 	@Override
--- a/src/net/sf/openrocket/unit/Unit.java
+++ b/src/net/sf/openrocket/unit/Unit.java
@ -2,10 +2,12 @@ package net.sf.openrocket.unit;

 import java.text.DecimalFormat;

+import net.sf.openrocket.util.Chars;
+
 public abstract class Unit {
 	
 	/** No unit with 2 digit precision */
-	public static final Unit NOUNIT2 = new GeneralUnit(1,"\u200b", 2);  // zero-width space
+	public static final Unit NOUNIT2 = new GeneralUnit(1,""+Chars.ZWSP, 2);

 	protected final double multiplier;   // meters = units * multiplier
 	protected final String unit;
--- a/src/net/sf/openrocket/unit/UnitGroup.java
+++ b/src/net/sf/openrocket/unit/UnitGroup.java
@ -1,5 +1,6 @@
 package net.sf.openrocket.unit;

+import static net.sf.openrocket.util.Chars.*;
 import static net.sf.openrocket.util.MathUtil.pow2;

 import java.util.ArrayList;
@ -89,11 +90,11 @@ public class UnitGroup {
 		UNITS_DISTANCE.addUnit(new GeneralUnit(1609.344,"mi"));
 		
 		UNITS_AREA = new UnitGroup();
-		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001),"mm\u00b2"));
-		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01),"cm\u00b2"));
-		UNITS_AREA.addUnit(new GeneralUnit(1,"m\u00b2"));
-		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.0254),"in\u00b2"));
-		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.3048),"ft\u00b2"));
+		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.001),"mm" + SQUARED));
+		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.01),"cm" + SQUARED));
+		UNITS_AREA.addUnit(new GeneralUnit(1,"m" + SQUARED));
+		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.0254),"in" + SQUARED));
+		UNITS_AREA.addUnit(new GeneralUnit(pow2(0.3048),"ft" + SQUARED));
 		UNITS_AREA.setDefaultUnit(1);
 		
 		
@ -111,8 +112,8 @@ public class UnitGroup {
 		UNITS_VELOCITY.addUnit(new GeneralUnit(0.44704, "mph"));
 		
 		UNITS_ACCELERATION = new UnitGroup();
-		UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s\u00b2"));
-		UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s\u00b2"));
+		UNITS_ACCELERATION.addUnit(new GeneralUnit(1, "m/s" + SQUARED));
+		UNITS_ACCELERATION.addUnit(new GeneralUnit(0.3048, "ft/s" + SQUARED));
 		

 		UNITS_MASS = new UnitGroup();
@ -126,18 +127,18 @@ public class UnitGroup {
 		UNITS_ANGLE.addUnit(new FixedPrecisionUnit("rad",0.01));
 		
 		UNITS_DENSITY_BULK = new UnitGroup();
-		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000,"g/cm\u00b3"));
-		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1,"kg/m\u00b3"));
-		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404,"oz/in\u00b3"));
-		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634,"lb/ft\u00b3"));
+		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1000,"g/cm" + CUBED));
+		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1,"kg/m" + CUBED));
+		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(1729.99404,"oz/in" + CUBED));
+		UNITS_DENSITY_BULK.addUnit(new GeneralUnit(16.0184634,"lb/ft" + CUBED));

 		UNITS_DENSITY_SURFACE = new UnitGroup();
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10,"g/cm\u00b2"));
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001,"g/m\u00b2"));
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(1,"kg/m\u00b2"));
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487,"oz/in\u00b2"));
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727,"oz/ft\u00b2"));
-		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764,"lb/ft\u00b2"));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(10,"g/cm" + SQUARED));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.001,"g/m" + SQUARED));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(1,"kg/m" + SQUARED));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(43.9418487,"oz/in" + SQUARED));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(0.305151727,"oz/ft" + SQUARED));
+		UNITS_DENSITY_SURFACE.addUnit(new GeneralUnit(4.88242764,"lb/ft" + SQUARED));
 		UNITS_DENSITY_SURFACE.setDefaultUnit(1);

 		UNITS_DENSITY_LINE = new UnitGroup();
@ -152,7 +153,7 @@ public class UnitGroup {

 		UNITS_IMPULSE = new UnitGroup();
 		UNITS_IMPULSE.addUnit(new GeneralUnit(1,"Ns"));
-		UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf\u00b7s"));
+		UNITS_IMPULSE.addUnit(new GeneralUnit(4.44822162, "lbf"+DOT+"s"));

 		UNITS_TIME_STEP = new UnitGroup();
 		UNITS_TIME_STEP.addUnit(new FixedPrecisionUnit("ms", 1, 0.001));
@ -174,8 +175,8 @@ public class UnitGroup {

 		UNITS_TEMPERATURE = new UnitGroup();
 		UNITS_TEMPERATURE.addUnit(new FixedPrecisionUnit("K", 1));
-		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, "\u00b0C"));
-		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0/9.0, 459.67, "\u00b0F"));
+		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(1, 273.15, DEGREE+"C"));
+		UNITS_TEMPERATURE.addUnit(new TemperatureUnit(5.0/9.0, 459.67, DEGREE+"F"));
 		UNITS_TEMPERATURE.setDefaultUnit(1);
 		
 		UNITS_PRESSURE = new UnitGroup();
@ -188,18 +189,19 @@ public class UnitGroup {
 		UNITS_PRESSURE.addUnit(new GeneralUnit(1, "Pa"));

 		UNITS_RELATIVE = new UnitGroup();
-		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("\u200b", 0.01));
+		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit(""+ZWSP, 0.01, 1.0));
 		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit("%", 1, 0.01));
+		UNITS_RELATIVE.addUnit(new FixedPrecisionUnit(""+PERMILLE, 1, 0.001));
 		UNITS_RELATIVE.setDefaultUnit(1);

 		
 		UNITS_ROUGHNESS = new UnitGroup();
-		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, "\u03bcm"));
+		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.000001, MICRO+"m"));
 		UNITS_ROUGHNESS.addUnit(new GeneralUnit(0.0000254, "mil"));
 		
 		
 		UNITS_COEFFICIENT = new UnitGroup();
-		UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit("\u200b", 0.01));  // zero-width space
+		UNITS_COEFFICIENT.addUnit(new FixedPrecisionUnit(""+ZWSP, 0.01));  // zero-width space
 		

 		HashMap<String,UnitGroup> map = new HashMap<String,UnitGroup>();
@ -235,45 +237,45 @@ public class UnitGroup {
 		UNITS_LENGTH.setDefaultUnit("cm");
 		UNITS_MOTOR_DIMENSIONS.setDefaultUnit("mm");
 		UNITS_DISTANCE.setDefaultUnit("m");
-		UNITS_AREA.setDefaultUnit("cm\u00b2");
+		UNITS_AREA.setDefaultUnit("cm"+SQUARED);
 		UNITS_STABILITY.setDefaultUnit("cal");
 		UNITS_VELOCITY.setDefaultUnit("m/s");
-		UNITS_ACCELERATION.setDefaultUnit("m/s\u00b2");
+		UNITS_ACCELERATION.setDefaultUnit("m/s"+SQUARED);
 		UNITS_MASS.setDefaultUnit("g");
-		UNITS_ANGLE.setDefaultUnit(0);
-		UNITS_DENSITY_BULK.setDefaultUnit("g/cm\u00b3");
-		UNITS_DENSITY_SURFACE.setDefaultUnit("g/m\u00b2");
+		UNITS_ANGLE.setDefaultUnit(""+DEGREE);
+		UNITS_DENSITY_BULK.setDefaultUnit("g/cm"+CUBED);
+		UNITS_DENSITY_SURFACE.setDefaultUnit("g/m"+SQUARED);
 		UNITS_DENSITY_LINE.setDefaultUnit("g/m");
 		UNITS_FORCE.setDefaultUnit("N");
 		UNITS_IMPULSE.setDefaultUnit("Ns");
 		UNITS_TIME_STEP.setDefaultUnit("s");
 		UNITS_FLIGHT_TIME.setDefaultUnit("s");
 		UNITS_ROLL.setDefaultUnit("r/s");
-		UNITS_TEMPERATURE.setDefaultUnit(1);
+		UNITS_TEMPERATURE.setDefaultUnit(DEGREE+"C");
 		UNITS_PRESSURE.setDefaultUnit("mbar");
 		UNITS_RELATIVE.setDefaultUnit("%");
-		UNITS_ROUGHNESS.setDefaultUnit("\u03bcm");
+		UNITS_ROUGHNESS.setDefaultUnit(MICRO+"m");
 	}
 	
 	public static void setDefaultImperialUnits() {
 		UNITS_LENGTH.setDefaultUnit("in");
 		UNITS_MOTOR_DIMENSIONS.setDefaultUnit("in");
 		UNITS_DISTANCE.setDefaultUnit("ft");
-		UNITS_AREA.setDefaultUnit("in\u00b2");
+		UNITS_AREA.setDefaultUnit("in"+SQUARED);
 		UNITS_STABILITY.setDefaultUnit("cal");
 		UNITS_VELOCITY.setDefaultUnit("ft/s");
-		UNITS_ACCELERATION.setDefaultUnit("ft/s\u00b2");
+		UNITS_ACCELERATION.setDefaultUnit("ft/s"+SQUARED);
 		UNITS_MASS.setDefaultUnit("oz");
-		UNITS_ANGLE.setDefaultUnit(0);
-		UNITS_DENSITY_BULK.setDefaultUnit("oz/in\u00b3");
-		UNITS_DENSITY_SURFACE.setDefaultUnit("oz/ft\u00b2");
+		UNITS_ANGLE.setDefaultUnit(""+DEGREE);
+		UNITS_DENSITY_BULK.setDefaultUnit("oz/in"+CUBED);
+		UNITS_DENSITY_SURFACE.setDefaultUnit("oz/ft"+SQUARED);
 		UNITS_DENSITY_LINE.setDefaultUnit("oz/ft");
 		UNITS_FORCE.setDefaultUnit("N");
 		UNITS_IMPULSE.setDefaultUnit("Ns");
 		UNITS_TIME_STEP.setDefaultUnit("s");
 		UNITS_FLIGHT_TIME.setDefaultUnit("s");
 		UNITS_ROLL.setDefaultUnit("r/s");
-		UNITS_TEMPERATURE.setDefaultUnit(2);
+		UNITS_TEMPERATURE.setDefaultUnit(DEGREE+"F");
 		UNITS_PRESSURE.setDefaultUnit("mbar");
 		UNITS_RELATIVE.setDefaultUnit("%");
 		UNITS_ROUGHNESS.setDefaultUnit("mil");
@ -337,24 +339,20 @@ public class UnitGroup {
 	}
 	
 	/**
-	 * Set the default unit based on the unit name.  Does nothing if the name
-	 * does not match any of the units.
+	 * Set the default unit based on the unit name.  Throws an exception if a
+	 * unit with the provided name is not available.
 	 * 
-	 * @param name	the unit name (<code>null</code> ok).
-	 * @return		<code>true</code> if the the default was set, 
-	 * 				<code>false</code> if a matching unit was not found.  
+	 * @param   name	the unit name.
+	 * @throws  IllegalArgumentException	if the corresponding unit is not found in the group.
 	 */
-	public boolean setDefaultUnit(String name) {
-		if (name == null)
-			return false;
-		
+	public void setDefaultUnit(String name) throws IllegalArgumentException {
 		for (int i=0; i < units.size(); i++) {
-			if (name.equals(units.get(i).getUnit())) {
+			if (units.get(i).getUnit().equals(name)) {
 				setDefaultUnit(i);
-				return true;
+				return;
 			}
 		}
-		return false;
+		throw new IllegalArgumentException("name="+name);
 	}

 	
--- a/src/net/sf/openrocket/util/Chars.java
+++ b/src/net/sf/openrocket/util/Chars.java
@ -0,0 +1,50 @@
+package net.sf.openrocket.util;
+
+/**
+ * A class defining various non-ASCII characters for easier use. 
+ * 
+ * @author Sampo Niskanen <sampo.niskanen@iki.fi>
+ */
+public class Chars {
+
+	/** The fraction 1/2 */
+	public static final char FRAC12 = '\u00BD';
+	/** The fraction 1/4 */
+	public static final char FRAC14 = '\u00BC';
+	/** The fraction 3/4 */
+	public static final char FRAC34 = '\u00BE';
+	
+	/** Degree sign */
+	public static final char DEGREE = '\u00B0';
+	
+	/** Squared, superscript 2 */
+	public static final char SQUARED = '\u00B2';
+	/** Cubed, superscript 3 */
+	public static final char CUBED = '\u00B3';
+	
+	/** Per mille sign */
+	public static final char PERMILLE = '\u2030';
+	
+	/** Middle dot, multiplication */
+	public static final char DOT = '\u00B7';
+	/** Multiplication sign, cross */
+	public static final char TIMES = '\u00D7';
+	
+	/** No-break space */
+	public static final char NBSP = '\u00A0';
+	/** Zero-width space */
+	public static final char ZWSP = '\u200B';
+	
+	/** Micro sign (Greek letter mu) */
+	public static final char MICRO = '\u00B5';
+
+	/** Alpha */
+	public static final char ALPHA = '\u03b1';
+	/** Theta */
+	public static final char THETA = '\u0398';
+	
+	/** Copyright symbol */
+	public static final char COPY = '\u00A9';
+	/** A centered bullet */
+	public static final char BULLET = '\u2022';
+}
--- a/src/net/sf/openrocket/util/ConcurrentProgressMonitor.java
+++ b/src/net/sf/openrocket/util/ConcurrentProgressMonitor.java
@ -10,7 +10,7 @@ import javax.swing.SwingUtilities;
 * A thread-safe <code>ProgressMonitor</code>.  This class may be instantiated
 * and the method {@link #setProgress(int)} called safely from any thread.
 * <p>
- * Why the FSCK&!¤#&%¤ isn't the default API version thread-safe?!?!
+ * Why the FSCK&!#&% isn't the default API version thread-safe?!?!
 * 
 * @author Sampo Niskanen <sampo.niskanen@iki.fi>
 */
--- a/src/net/sf/openrocket/util/Pair.java
+++ b/src/net/sf/openrocket/util/Pair.java
@ -26,4 +26,40 @@ public class Pair<U,V> {
 		return v;
 	}
 	
+	
+	/**
+	 * Compare both components of the Pair to another object.
+	 * The pair is equal iff both items are equal (or null).
+	 */
+	@SuppressWarnings("unchecked")
+	@Override
+	public boolean equals(Object other) {
+		if (!(other instanceof Pair))
+			return false;
+		Object otherU = ((Pair)other).getU();
+		Object otherV = ((Pair)other).getV();
+		
+		if (otherU == null) {
+			if (this.u != null)
+				return false;
+		} else {
+			if (!otherU.equals(this.u))
+				return false;
+		}
+
+		if (otherV == null) {
+			if (this.v != null)
+				return false;
+		} else {
+			if (!otherV.equals(this.v))
+				return false;
+		}
+		return true;
+	}
+	
+	@Override
+	public int hashCode() {
+		return ((u != null) ? u.hashCode() : 0) + ((v != null) ? v.hashCode() : 0);
+	}
+	
 }
--- a/src/net/sf/openrocket/util/Prefs.java
+++ b/src/net/sf/openrocket/util/Prefs.java
@ -52,50 +52,62 @@ public class Prefs {
 	 */
 	public static final String NODENAME = (DEBUG?"OpenRocket-debug":"OpenRocket");
 	
-	
-	
-	private static final String BUILD_VERSION;
-	private static final String BUILD_SOURCE;
+
 	public static final String DEFAULT_BUILD_SOURCE = "default";
-	private static final boolean DEFAULT_CHECK_UPDATES;
+
 	
-	static {
-		try {
-			InputStream is = ClassLoader.getSystemResourceAsStream("build.properties");
-			if (is == null) {
+	/*
+	 * Load property file only when necessary.
+	 */
+	private static class BuildPropertyHolder {
+
+		public static final String BUILD_VERSION;
+		public static final String BUILD_SOURCE;
+		public static final boolean DEFAULT_CHECK_UPDATES;
+
+		static {
+			try {
+				InputStream is = ClassLoader.getSystemResourceAsStream("build.properties");
+				if (is == null) {
+					throw new MissingResourceException(
+							"build.properties not found, distribution built wrong" + 
+							"   classpath:"+System.getProperty("java.class.path"),
+							"build.properties", "build.version");
+				}
+
+				Properties props = new Properties();
+				props.load(is);
+				is.close();
+
+				String version = props.getProperty("build.version");
+				if (version == null) {
+					throw new MissingResourceException(
+							"build.version not found in property file",
+							"build.properties", "build.version");
+				}
+				BUILD_VERSION = version.trim();
+
+				BUILD_SOURCE = props.getProperty("build.source");
+				if (BUILD_SOURCE == null) {
+					throw new MissingResourceException(
+							"build.source not found in property file",
+							"build.properties", "build.source");
+				}
+
+				String value = props.getProperty("build.checkupdates");
+				if (value != null)
+					DEFAULT_CHECK_UPDATES = Boolean.parseBoolean(value);
+				else
+					DEFAULT_CHECK_UPDATES = true;
+
+			} catch (IOException e) {
 				throw new MissingResourceException(
-						"build.properties not found, distribution built wrong" + 
-						"   path:"+System.getProperty("java.class.path"),
+						"Error reading build.properties",
 						"build.properties", "build.version");
 			}
-			
-			Properties props = new Properties();
-			props.load(is);
-			is.close();
-			
-			BUILD_VERSION = props.getProperty("build.version");
-			if (BUILD_VERSION == null) {
-				throw new MissingResourceException(
-						"build.version not found in property file",
-						"build.properties", "build.version");
-			}
-			
-			BUILD_SOURCE = props.getProperty("build.source");
-			
-			String value = props.getProperty("build.checkupdates");
-			if (value != null)
-				DEFAULT_CHECK_UPDATES = Boolean.parseBoolean(value);
-			else
-				DEFAULT_CHECK_UPDATES = true;
-			
-		} catch (IOException e) {
-			throw new MissingResourceException(
-					"Error reading build.properties",
-					"build.properties", "build.version");
 		}
 	}
 	
-	
 	public static final String BODY_COMPONENT_INSERT_POSITION_KEY = "BodyComponentInsertPosition";
 	
 	
@ -111,6 +123,7 @@ public class Prefs {
 	public static final String PLOT_SHOW_POINTS = "ShowPlotPoints";
 	
 	private static final String CHECK_UPDATES = "CheckUpdates";
+	public static final String LAST_UPDATE = "LastUpdateVersion";
 	
 	/**
 	 * Node to this application's preferences.
@ -178,12 +191,12 @@ public class Prefs {
 	
 	
 	public static String getVersion() {
-		return BUILD_VERSION;
+		return BuildPropertyHolder.BUILD_VERSION;
 	}
 	
 	
 	public static String getBuildSource() {
-		return BUILD_SOURCE;
+		return BuildPropertyHolder.BUILD_SOURCE;
 	}
 	
 	
@ -256,7 +269,7 @@ public class Prefs {
 	
 	
 	public static boolean getCheckUpdates() {
-		return PREFNODE.getBoolean(CHECK_UPDATES, DEFAULT_CHECK_UPDATES);
+		return PREFNODE.getBoolean(CHECK_UPDATES, BuildPropertyHolder.DEFAULT_CHECK_UPDATES);
 	}
 	
 	public static void setCheckUpdates(boolean check) {
@ -502,7 +515,9 @@ public class Prefs {
 				if (group == null)
 					continue;
 				
-				group.setDefaultUnit(prefs.get(key, null));
+				try {
+					group.setDefaultUnit(prefs.get(key, null));
+				} catch (IllegalArgumentException ignore) { }
 			}
 			
 		} catch (BackingStoreException e) {
--- a/test/net/sf/openrocket/motor/ManufacturerTest.java
+++ b/test/net/sf/openrocket/motor/ManufacturerTest.java
@ -73,7 +73,7 @@ public class ManufacturerTest {
 		assertTrue(m1.matches("a/"));
 		assertTrue(m1.matches("a/rcs"));
 		assertTrue(m1.matches("a/rms"));
-		assertTrue(m1.matches("aerotech  ...-/%¤#_!"));
+		assertTrue(m1.matches("aerotech  ...-/%#_!"));
 		assertTrue(m1.matches(" .isp/"));
 		
 		assertFalse(m1.matches("aero/tech"));
--- a/test/net/sf/openrocket/util/CoordinateTest.java
+++ b/test/net/sf/openrocket/util/CoordinateTest.java
@ -38,11 +38,11 @@ public class CoordinateTest {

 		assertCoordinateEquals(new Coordinate(2,4,6,8), y.multiply(2));
 		
-		assertEquals(1+2+3, y.dot(x));
-		assertEquals(1+2+3, x.dot(y));
-		assertEquals(1+2+3, Coordinate.dot(x,y));
-		assertEquals(x.dot(x), x.length2());
-		assertEquals(y.dot(y), y.length2());
+		assertEquals(1+2+3, y.dot(x), EPS);
+		assertEquals(1+2+3, x.dot(y), EPS);
+		assertEquals(1+2+3, Coordinate.dot(x,y), EPS);
+		assertEquals(x.dot(x), x.length2(), EPS);
+		assertEquals(y.dot(y), y.length2(), EPS);
 		assertEquals(Math.sqrt(1+4+9), y.length(), EPS);
 		assertEquals(1, y.normalize().length(), EPS);
 		
--- a/test/net/sf/openrocket/util/MathUtilTest.java
+++ b/test/net/sf/openrocket/util/MathUtilTest.java
@ -17,24 +17,24 @@ public class MathUtilTest {
 		assertEquals(PI*PI*PI, MathUtil.pow3(PI), EPS);
 		assertEquals(PI*PI*PI*PI, MathUtil.pow4(PI), EPS);
 		
-		assertEquals(1.0, MathUtil.clamp(0.9999, 1.0, 2.0));
-		assertEquals(1.23, MathUtil.clamp(1.23, 1.0, 2.0));
-		assertEquals(2.0, MathUtil.clamp(2 + EPS/100, 1.0, 2.0));
+		assertEquals(1.0, MathUtil.clamp(0.9999, 1.0, 2.0), 0);
+		assertEquals(1.23, MathUtil.clamp(1.23, 1.0, 2.0), 0);
+		assertEquals(2.0, MathUtil.clamp(2 + EPS/100, 1.0, 2.0), 0);
 		
-		assertEquals(1.0f, MathUtil.clamp(0.9999f, 1.0f, 2.0f));
-		assertEquals(1.23f, MathUtil.clamp(1.23f, 1.0f, 2.0f));
-		assertEquals(2.0f, MathUtil.clamp(2.0001f, 1.0f, 2.0f));
+		assertEquals(1.0f, MathUtil.clamp(0.9999f, 1.0f, 2.0f), 0);
+		assertEquals(1.23f, MathUtil.clamp(1.23f, 1.0f, 2.0f), 0);
+		assertEquals(2.0f, MathUtil.clamp(2.0001f, 1.0f, 2.0f), 0);
 		
 		assertEquals(1, MathUtil.clamp(-3, 1, 5));
 		assertEquals(3, MathUtil.clamp(3, 1, 5));
 		assertEquals(5, MathUtil.clamp(6, 1, 5));
 		
-		assertEquals(-1.0, MathUtil.sign(Double.NEGATIVE_INFINITY));
-		assertEquals(-1.0, MathUtil.sign(-100));
-		assertEquals(-1.0, MathUtil.sign(Math.nextAfter(0.0, -1.0)));
-		assertEquals( 1.0, MathUtil.sign(Math.nextUp(0.0)));
-		assertEquals( 1.0, MathUtil.sign(100));
-		assertEquals( 1.0, MathUtil.sign(Double.POSITIVE_INFINITY));
+		assertEquals(-1.0, MathUtil.sign(Double.NEGATIVE_INFINITY), EPS);
+		assertEquals(-1.0, MathUtil.sign(-100), EPS);
+		assertEquals(-1.0, MathUtil.sign(Math.nextAfter(0.0, -1.0)), EPS);
+		assertEquals( 1.0, MathUtil.sign(Math.nextUp(0.0)), EPS);
+		assertEquals( 1.0, MathUtil.sign(100), EPS);
+		assertEquals( 1.0, MathUtil.sign(Double.POSITIVE_INFINITY), EPS);
 	}
 	
 	@Test
@ -68,33 +68,33 @@ public class MathUtilTest {
 	
 	@Test
 	public void minmaxTest() {
-		assertEquals(1.0, MathUtil.min(1.0, Math.nextUp(1.0)));
-		assertEquals(1.0, MathUtil.min(1.0, Double.POSITIVE_INFINITY));
-		assertEquals(1.0, MathUtil.min(NaN, 1.0));
-		assertEquals(1.0, MathUtil.min(1.0, NaN));
-		assertEquals(NaN, MathUtil.min(NaN, NaN));
+		assertEquals(1.0, MathUtil.min(1.0, Math.nextUp(1.0)), 0);
+		assertEquals(1.0, MathUtil.min(1.0, Double.POSITIVE_INFINITY), 0);
+		assertEquals(1.0, MathUtil.min(NaN, 1.0), 0);
+		assertEquals(1.0, MathUtil.min(1.0, NaN), 0);
+		assertEquals(NaN, MathUtil.min(NaN, NaN), 0);

-		assertEquals(Math.nextUp(1.0), MathUtil.max(1.0, Math.nextUp(1.0)));
-		assertEquals(Double.POSITIVE_INFINITY, MathUtil.max(1.0, Double.POSITIVE_INFINITY));
-		assertEquals(1.0, MathUtil.max(NaN, 1.0));
-		assertEquals(1.0, MathUtil.max(1.0, NaN));
-		assertEquals(NaN, MathUtil.max(NaN, NaN));
+		assertEquals(Math.nextUp(1.0), MathUtil.max(1.0, Math.nextUp(1.0)), 0);
+		assertEquals(Double.POSITIVE_INFINITY, MathUtil.max(1.0, Double.POSITIVE_INFINITY), 0);
+		assertEquals(1.0, MathUtil.max(NaN, 1.0), 0);
+		assertEquals(1.0, MathUtil.max(1.0, NaN), 0);
+		assertEquals(NaN, MathUtil.max(NaN, NaN), 0);
 		
-		assertEquals(1.0, MathUtil.min(1.0, 2.0, 3.0));
-		assertEquals(1.0, MathUtil.min(1.0, NaN, NaN));
-		assertEquals(1.0, MathUtil.min(NaN, 1.0, NaN));
-		assertEquals(1.0, MathUtil.min(NaN, NaN, 1.0));
-		assertEquals(1.0, MathUtil.min(2.0, NaN, 1.0));
-		assertEquals(1.0, MathUtil.min(1.0, 2.0, NaN));
-		assertEquals(1.0, MathUtil.min(NaN, 2.0, 1.0));
+		assertEquals(1.0, MathUtil.min(1.0, 2.0, 3.0), 0);
+		assertEquals(1.0, MathUtil.min(1.0, NaN, NaN), 0);
+		assertEquals(1.0, MathUtil.min(NaN, 1.0, NaN), 0);
+		assertEquals(1.0, MathUtil.min(NaN, NaN, 1.0), 0);
+		assertEquals(1.0, MathUtil.min(2.0, NaN, 1.0), 0);
+		assertEquals(1.0, MathUtil.min(1.0, 2.0, NaN), 0);
+		assertEquals(1.0, MathUtil.min(NaN, 2.0, 1.0), 0);
 		
-		assertEquals(3.0, MathUtil.max(1.0, 3.0, 2.0));
-		assertEquals(1.0, MathUtil.max(1.0, NaN, NaN));
-		assertEquals(1.0, MathUtil.max(NaN, 1.0, NaN));
-		assertEquals(1.0, MathUtil.max(NaN, NaN, 1.0));
-		assertEquals(2.0, MathUtil.max(2.0, NaN, 1.0));
-		assertEquals(2.0, MathUtil.max(1.0, 2.0, NaN));
-		assertEquals(2.0, MathUtil.max(NaN, 2.0, 1.0));
+		assertEquals(3.0, MathUtil.max(1.0, 3.0, 2.0), 0);
+		assertEquals(1.0, MathUtil.max(1.0, NaN, NaN), 0);
+		assertEquals(1.0, MathUtil.max(NaN, 1.0, NaN), 0);
+		assertEquals(1.0, MathUtil.max(NaN, NaN, 1.0), 0);
+		assertEquals(2.0, MathUtil.max(2.0, NaN, 1.0), 0);
+		assertEquals(2.0, MathUtil.max(1.0, 2.0, NaN), 0);
+		assertEquals(2.0, MathUtil.max(NaN, 2.0, 1.0), 0);
 	}
 	
 	@Test