package edu.hws.eck.mdb; import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.imageio.ImageIO; import javax.swing.*; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import java.util.StringTokenizer; import org.w3c.dom.*; import java.io.*; import java.net.URL; /** * This class defines a JMenuBar for use with a MandelbrotPanel. This is a large * and complex class because it includes many nested classes and Actions that * do the work of carrying out menu commands. However, all the complexity is in * the private part of the class, and the class has only a very small public interface * consisting of just the constructor and two methods that are used in implementing * "preferences" in Main.java. * @author David J. Eck */ public class Menus extends JMenuBar { /* On July 20, 2014, stuff related to using the program as an applet was eliminated. * Also, the Examples menu, which used to be only in the Applet version, has been * added to this class. */ /* Another bug in makeAccelerator() was fixed on January 9, 2011. The modifier * key for non-Mac platforms was specified as "cntr " rather than "ctrl ". So, all * this time, there were no accelerator keys, except under Mac OS! */ /* This file was modified on December 2, 2007 to fix a bug in the "LauncherApplet" * version of the program. A SecurityException was thrown on non-Mac-OS platforms * by the call to System.getProperty() in the makeAccelerator() method. This * prevented the LauncherApplet from opening a window (except under Mac OS). */ /** * This is the list of example files for the Examples menu. The items in the * menu are the strings from this array. For a string str in the array, * a resource file name is constructed as: "edu/hws/edu/mdb/examples" + str + ".mdb" * The resulting names must be names of resource files that are accessible * to the program. The files should be settings files for the Mandelbrot * Viewer program. When the user selects an item from the Examples menu, * the corresponding file is loaded and applied to the display. */ private static final String[] SETTINGS_FILE_LIST = { "settings1", "settings2", "settings3", "settings4", "settings5", "settings6", "settings7", "settings8", "settings9", "settings10", "settings11", "settings12" }; /** * Constructor creates the menu bar containing commands that apply to a * MandelbrotPanel. The configuration of the menu bar can be slightly * different, depending on the parameters to the constructor. The menu * bar contains File, MaxIterations, Palette, PaletteLength, and Example menus. * @param owner The MandelbrotPanel that will be managed by this menu bar. This * variable is also used for access to the MandelbrotDisplay that is * contained in the panel. This parameter cannot be null. * @param frame the frame, if any, that contains the MandelbrotPanel. The value * can be null -- if it is, no accelerators are added to the menu items, * and there will be no "Set Image Size" command in the Control menu; this command * requires the frame to change size and so cannot be carried out if there * is no frame. */ public Menus(MandelbrotPanel owner, MandelbrotFrame frame) { this.owner = owner; this.frame = frame; paletteManager = new PaletteManager(); // Manages Palette menu. paletteLengthManager = new PaletteLengthManager(); // Manages PaletteLength menu. maxIterationsManager = new MaxIterationsManager(); // Manages MaxIterations menu. // (Note that the Actions that carry out commands in other menus are // defined as instance variables that are initialized as part of their // declarations later in this class.) if (frame != null) { // Add accelerator keys. saveParams.putValue(Action.ACCELERATOR_KEY, makeAccelerator("S")); saveImage.putValue(Action.ACCELERATOR_KEY, makeAccelerator("shift S")); openParams.putValue(Action.ACCELERATOR_KEY, makeAccelerator("O")); close.putValue(Action.ACCELERATOR_KEY, makeAccelerator("Q")); defaultLimits.putValue(Action.ACCELERATOR_KEY, makeAccelerator("R")); allDefaults.putValue(Action.ACCELERATOR_KEY, makeAccelerator("shift R")); undoChangeOfLimits.putValue(Action.ACCELERATOR_KEY, makeAccelerator("U")); showLimits.putValue(Action.ACCELERATOR_KEY, makeAccelerator("L")); setLimits.putValue(Action.ACCELERATOR_KEY, makeAccelerator("shift L")); setImageSize.putValue(Action.ACCELERATOR_KEY, makeAccelerator("shift I")); paletteManager.items[0].setAccelerator(makeAccelerator("T")); paletteLengthManager.items[0].setAccelerator(makeAccelerator("M")); } // Create menus and add them to the menu bar. JMenu fileMenu = new JMenu(I18n.tr("menu.file")); add(fileMenu); JMenu controlMenu = new JMenu(I18n.tr("menu.control")); add(controlMenu); JMenu maxIterationsMenu = new JMenu(I18n.tr("menu.maxIterations")); add(maxIterationsMenu); JMenu paletteMenu = new JMenu(I18n.tr("menu.palette")); add(paletteMenu); JMenu paletteLengthMenu = new JMenu(I18n.tr("menu.paletteLength")); add(paletteLengthMenu); JMenu exampleMenu = new JMenu(I18n.tr("menu.examples")); add(exampleMenu); // Add items to the File menu. fileMenu.add(saveParams); fileMenu.add(openParams); fileMenu.addSeparator(); fileMenu.add(saveImage); fileMenu.addSeparator(); fileMenu.add(close); // Add items to the Control menu. controlMenu.add(allDefaults); controlMenu.addSeparator(); controlMenu.add(defaultLimits); controlMenu.add(undoChangeOfLimits); undoChangeOfLimits.setEnabled(false); controlMenu.add(showLimits); controlMenu.add(setLimits); if (frame != null) { controlMenu.addSeparator(); controlMenu.add(setImageSize); controlMenu.addSeparator(); controlMenu.add(close); } // Add items to the other three menus. These are created by the "manager" objects. // and by the fillExampleMenu() method. for (JMenuItem item : paletteManager.items) paletteMenu.add(item); for (JMenuItem item : paletteLengthManager.items) paletteLengthMenu.add(item); for (JMenuItem item : maxIterationsManager.items) maxIterationsMenu.add(item); fillExampleMenu(exampleMenu); // Add property change listeners to the MandebrotDisplay, so that this // menu bar can be notified when certain changes occur in the display. owner.getDisplay().addPropertyChangeListener(MandelbrotDisplay.LIMITS_PROPERTY, new PropertyChangeListener() { // This listener responds when the limits are changed in the // display. The only action is to save the old values of // the limits, so that they can be used in the Restore Previous Limits // command. (Also, the command is enabled because a previous set // of limits is now available.) public void propertyChange(PropertyChangeEvent e) { if (e.getPropertyName() == MandelbrotDisplay.LIMITS_PROPERTY) { previousLimits = (double[])e.getOldValue(); undoChangeOfLimits.setEnabled(true); } } }); owner.getDisplay().addPropertyChangeListener(MandelbrotDisplay.STATUS_PROPERTY, new PropertyChangeListener() { // This listener responds when the "status" of the display // changes. The status is used, in the newDisplayStatus method, // to enable and disable menu commands that should only be // be available when the display is in a certain state. public void propertyChange(PropertyChangeEvent e) { if (e.getPropertyName() == MandelbrotDisplay.STATUS_PROPERTY) { newDisplayStatus(e.getNewValue()); } } }); newDisplayStatus(owner.getDisplay().getStatus()); // Enable/disable commands based on initial display status. } // end constructor /** * If the fileDialog has been used to carry out one of the save/open commands, * then some directory will be selected in the dialog box. This method returns * an absolute path name for that selected directory. This method is used * by Main.java to find out the selected directory when the program ends. * The directory is saved in user preferences and is restored the next time * the program is run. */ public String getSelectedDirectoryInFileChooser() { if (fileDialog == null) return null; else { File dir = fileDialog.getCurrentDirectory(); if (dir == null) return null; else return dir.getAbsolutePath(); } } /** * This sets the selected directory in the file dialog. This method * is called by Main.java when the program starts to restore the directory * that was saved the last time the program was run (by the same user). * @param path absolute path name to the directory; if this is * not the path name of an actual directory, then the dialog's * selected directory is not set. */ public void setSelectedDirectoryInFileChooser(String path) { File dir = new File(path); if (dir.isDirectory()) { if (fileDialog == null) fileDialog = new JFileChooser(); fileDialog.setCurrentDirectory(dir); } } /** * Produces an XML representation of the current settings. * This is used by the Open Params action to restore the setting of the program based * on the contents of an XML file. It is also used * to implement an Examples menu. Currently, the image size is NOT adjusted to * the value in the file; the same picture that was saved is shown, but possibly at * a different size. (Note: This method is defective because I was lazy. If an * error occurs in the middle of processing the data, some of the setting will be * applied but not others. This ignores the guideline that the file should be * completely read and checked before any changes are made to the state of the * program.) */ public void retrieveSettingsFromXML(Document xmlDoc) { Element docElement = xmlDoc.getDocumentElement(); String docName = docElement.getTagName(); if (! docName.equalsIgnoreCase("mandelbrot_settings")) throw new IllegalArgumentException(I18n.tr("xml.error.wrongType",docName)); String version = docElement.getAttribute("version"); if ( ! version.equalsIgnoreCase("edu.hws.eck.mdb/1.0")) throw new IllegalArgumentException(I18n.tr("xml.error.wrongSettingsVersion")); NodeList nodes = docElement.getChildNodes(); int ct = nodes.getLength(); for (int i = 0; i < ct; i++) { Node node = nodes.item(i); if (node instanceof Element) { String name = ((Element)node).getTagName(); String value = ((Element)node).getAttribute("value"); try { if (name.equalsIgnoreCase("palettetype")) paletteManager.setValueFromString(value); else if (name.equalsIgnoreCase("palettelength")) paletteLengthManager.setValueFromString(value); else if (name.equalsIgnoreCase("maxiterations")) maxIterationsManager.setValueFromString(value); else if (name.equalsIgnoreCase("limits")) { String[] limitStrings = explode(value,","); double xmin = Double.parseDouble(limitStrings[0]); double xmax = Double.parseDouble(limitStrings[1]); double ymin = Double.parseDouble(limitStrings[2]); double ymax = Double.parseDouble(limitStrings[3]); owner.getDisplay().setLimits(xmin,xmax,ymin,ymax); } } catch (Exception e) { throw new IllegalArgumentException(I18n.tr("xml.error.illegalSettingsValue",name,value)); } } } } /** * This is used by the Save Params action to create an XML representation of * the current settings. (It is not currently used outside this class in the Mandelbrot * Viewer program.) */ public String currentSettingsAsXML() { StringBuffer buffer = new StringBuffer(); buffer.append("\n"); buffer.append("\n"); double[] limits = owner.getDisplay().getLimits(); String limitString = limits[0] + "," + limits[1] + "," + limits[2] + "," + limits[3]; buffer.append("\n"); String sizeString = owner.getDisplay().getWidth() + "," + owner.getDisplay().getHeight(); buffer.append("\n"); buffer.append("\n"); buffer.append("\n"); buffer.append("\n"); buffer.append("\n"); return buffer.toString(); } //------------------ Everything after this point is private -------------------------- private MandelbrotPanel owner; // From the parameter to the constructor. private MandelbrotFrame frame; // From the parameter to the constructor. private PaletteManager paletteManager; // Manages Palette menu; defined by nested class below. private PaletteLengthManager paletteLengthManager; // Manages PaletteLength menu; defined by nested class below. private MaxIterationsManager maxIterationsManager; // Manages MaxIterations menu; defined by nested class below. private JFileChooser fileDialog; // File dialog for open and save commands. private double[] previousLimits; // For the Restore Previous Limits command. private String commandKey; // "ctrl " or "meta ", depending on platform; used only in makeAccelerator() /** * Makes an accelerator keystroke from description, with "ctrl " or "meta " * tacked onto the front. Used only in the constructor. */ private KeyStroke makeAccelerator(String description) { if (commandKey == null) { commandKey = "ctrl "; // Fixed bug in January 2011. Previously, given as "cntr ". try { // try..catch added December 2007 to fix bug noted at top of this file if (System.getProperty("mrj.version") != null) commandKey = "meta "; } catch (SecurityException e) { } } return KeyStroke.getKeyStroke(commandKey + description); } /** * A convenience method that breaks up a string into tokens, where * the tokens are substrings separated by specified delimiters. * For example, explode("ab,cde,f,ghij", ",") produces an array * of the four substrings "ab" "cde" "f" "ghij". */ private String[] explode(String str, String separators) { StringTokenizer tokenizer = new StringTokenizer(str, separators); int ct = tokenizer.countTokens(); String[] tokens = new String[ct]; for (int i = 0; i < ct; i++) tokens[i] = tokenizer.nextToken(); return tokens; } /** * Enables/Disables some menu items, based on the status of the MandelbrotDisplay. * This method is called by a listener that listens for property change events * from the display. * @param status is probably either "working" or "ready". Working means that * a computation is in progress in the display. The save commands, the * entire MaxIterations menu,and the Set Limits and Set Image Size commands * are disabled during computations. There is a small possibility that the * program will not have enough memory to create the image; Set Image Size * would be enabled in this case because changing the image size might fix * the problem. */ private void newDisplayStatus(Object status) { boolean ready = status.equals(MandelbrotDisplay.STATUS_READY); boolean outofmem = status.equals(MandelbrotDisplay.STATUS_OUT_OF_MEMORY); saveImage.setEnabled(ready); saveParams.setEnabled(ready); openParams.setEnabled(ready); setLimits.setEnabled(ready); setImageSize.setEnabled(ready || outofmem); maxIterationsManager.setEnabled(ready || outofmem); } /** * A little utility method that makes strings out of the xy-limits on the display, * where the lengths of the strings is adjusted depending on the distance between * xmax and xmin. The idea is to try to avoid more digits after the decimal * points than makes sense. If it succeeds the coordinates that are shown for xmin * and xmax should differ only in their last four or five digits and the same should * also be true for ymin and ymax. * @return An array of 4 strings representing the values of xmin, xmax, ymin, ymax. */ private String[] makeScaledLimitStrings() { double xmin = owner.getDisplay().getXmin(); double xmax = owner.getDisplay().getXmax(); double ymin = owner.getDisplay().getYmin(); double ymax = owner.getDisplay().getYmax(); double diff = xmax - xmin; if (diff == 0) return new String[] { ""+xmin, ""+xmax, ""+ymin, ""+ymax }; int scale = 4; if (diff > 0) { while (diff < 1) { scale++; diff *= 10; } } String fmt = "%1." + scale + "f"; String[] str = new String[4]; str[0] = String.format(fmt,xmin); str[1] = String.format(fmt,xmax); str[2] = String.format(fmt,ymin); str[3] = String.format(fmt,ymax); return str; } // ------ The rest of the file defines Actions and nested classes that implement commands ------- private Action saveParams = new AbstractAction(I18n.tr("command.save")) { // Saves current setting in an XML format file. public void actionPerformed(ActionEvent evt) { if (fileDialog == null) fileDialog = new JFileChooser(); File selectedFile = new File(I18n.tr("files.saveparams.defaultFileName")); fileDialog.setSelectedFile(selectedFile); fileDialog.setDialogTitle(I18n.tr("files.saveparams.title")); int option = fileDialog.showSaveDialog(owner); if (option != JFileChooser.APPROVE_OPTION) return; // User canceled or clicked the dialog's close box. selectedFile = fileDialog.getSelectedFile(); if (selectedFile.exists()) { // Ask the user whether to replace the file. int response = JOptionPane.showConfirmDialog( owner, I18n.tr("files.fileexists",selectedFile.getName()), I18n.tr("files.confirmsave.title"), JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE ); if (response != JOptionPane.YES_OPTION) return; // User does not want to replace the file. } PrintWriter out; try { FileOutputStream stream = new FileOutputStream(selectedFile); out = new PrintWriter( stream ); } catch (Exception e) { JOptionPane.showMessageDialog(owner, I18n.tr("files.saveparams.error.cannotOpen", selectedFile.getName(), e.toString())); return; } try { out.print(currentSettingsAsXML()); out.close(); } catch (Exception e) { JOptionPane.showMessageDialog(owner, I18n.tr("files.saveparams.error.cannotWrite", selectedFile.getName(), e.toString())); } } }; private Action openParams = new AbstractAction(I18n.tr("command.open")) { // Loads settings from an XML file of the form that is saved by the Save Params command. public void actionPerformed(ActionEvent evt) { if (fileDialog == null) fileDialog = new JFileChooser(); fileDialog.setDialogTitle(I18n.tr("files.openparams.title")); fileDialog.setSelectedFile(null); // No file is initially selected. int option = fileDialog.showOpenDialog(owner); if (option != JFileChooser.APPROVE_OPTION) return; // User canceled or clicked the dialog's close box. File selectedFile = fileDialog.getSelectedFile(); Document xmldoc; try { DocumentBuilder docReader = DocumentBuilderFactory.newInstance().newDocumentBuilder(); xmldoc = docReader.parse(selectedFile); } catch (Exception e) { JOptionPane.showMessageDialog(owner, I18n.tr("files.openparams.error.notXML", selectedFile.getName(), e.toString())); return; } try { retrieveSettingsFromXML(xmldoc); } catch (Exception e) { JOptionPane.showMessageDialog(owner, I18n.tr("files.openparams.error.notParamsFile", selectedFile.getName(), e.getMessage())); } } }; private Action saveImage = new AbstractAction(I18n.tr("command.saveImage")) { // Saves the current image as a file in PNG format. public void actionPerformed(ActionEvent evt) { if (fileDialog == null) fileDialog = new JFileChooser(); BufferedImage image; // A copy of the image from the MandelbrotDisplay image = owner.getDisplay().getImage(); if (image == null) { JOptionPane.showMessageDialog(owner,I18n.tr("files.saveimage.noImage")); return; } fileDialog.setSelectedFile(new File(I18n.tr("files.saveimage.defaultFileName"))); fileDialog.setDialogTitle(I18n.tr("files.saveimage.title")); int option = fileDialog.showSaveDialog(owner); if (option != JFileChooser.APPROVE_OPTION) return; // User canceled or clicked the dialog's close box. File selectedFile = fileDialog.getSelectedFile(); if (selectedFile.exists()) { // Ask the user whether to replace the file. int response = JOptionPane.showConfirmDialog( owner, I18n.tr("files.fileexists",selectedFile.getName()), I18n.tr("files.confirmsave.title"), JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE ); if (response != JOptionPane.YES_OPTION) return; // User does not want to replace the file. } try { boolean hasPNG = ImageIO.write(image,"PNG",selectedFile); if ( ! hasPNG ) throw new Exception(I18n.tr("files.saveimage.noPNG")); } catch (Exception e) { JOptionPane.showMessageDialog(owner, I18n.tr("files.saveimage.cantwrite", selectedFile.getName(), e.toString())); } } }; private Action close = new AbstractAction(I18n.tr("command.quit")) { // Implement the Close or Quit command by disposing the frame. public void actionPerformed(ActionEvent evt) { frame.dispose(); } }; private Action defaultLimits = new AbstractAction(I18n.tr("command.defaultLimits")) { // Restores the default xy-limits on the MandelbrotDisplay. public void actionPerformed(ActionEvent evt) { owner.getDisplay().setLimits(-2.5,1.1,-1.35,1.35); } }; private Action allDefaults = new AbstractAction(I18n.tr("command.restoreAllDefaults")) { // Restores default settings for limits, palette type, palette length, and maxIterations. public void actionPerformed(ActionEvent evt) { owner.getDisplay().setLimits(-2.5,1.1,-1.35,1.35); paletteManager.setDefault(); paletteLengthManager.setDefault(); maxIterationsManager.setDefault(); } }; private Action undoChangeOfLimits = new AbstractAction(I18n.tr("command.undoChangeOfLimits")) { // Restores previous xy-limits on MandelbrotPanel. The previous limits are // obtained from a property change event that is emitted by the display whenever // the limits change. The listener stores the old limits in the previousLimits // instance variable. public void actionPerformed(ActionEvent evt) { if (previousLimits != null) owner.getDisplay().setLimits(previousLimits[0],previousLimits[1], previousLimits[2],previousLimits[3]); } }; private Action showLimits = new AbstractAction(I18n.tr("command.showLimits")) { // Puts up a message dialog that contains the current range of xy-values // that is shown in the MandelbrotDisplay. public void actionPerformed(ActionEvent evt) { String[] limits = makeScaledLimitStrings(); JOptionPane.showMessageDialog(owner, I18n.tr("dialog.showLimits",limits[0],limits[1],limits[2],limits[3])); } }; private Action setImageSize = new AbstractAction(I18n.tr("command.enterImageSize")) { // Puts up a dialog box of type SetImageSizeDialog (another class defined in // this package). The dialog box lets the user enter new values for the // width and height of the image. If the user does not cancel, then the // new width and height are applied to the image. The frame changes size // to match the new size. However, the size is not allowed to grow bigger // than will fit on the screen. public void actionPerformed(ActionEvent evt) { Dimension oldSize = owner.getDisplay().getSize(); Dimension newSize = SetImageSizeDialog.showDialog(frame, oldSize); if (newSize == null) return; owner.getDisplay().setPreferredSize(newSize); // Change the size that the display wants to be. frame.pack(); // Sizes the window to accommodate the preferred size. frame.adjustToScreenIfNecessary(); // Make sure frame fits on the screen. } }; private Action setLimits= new AbstractAction(I18n.tr("command.enterLimits")) { // Puts up a dialog box of type SetLimitsDialog (another class defined in // this package). The dialog box lets the user enter new values for xmin, // xmax, ymin, and ymax (the limits of the range of xy-values shown in the // MandelbrotDisplay). If the user does not cancel, the new limits are // applied to the display. public void actionPerformed(ActionEvent evt) { String[] limits = makeScaledLimitStrings(); double[] newLimits = SetLimitsDialog.showDialog(frame, limits); if (newLimits != null) owner.getDisplay().setLimits(newLimits[0],newLimits[1],newLimits[2],newLimits[3]); } }; private void fillExampleMenu(JMenu menu) { // Adds examples to the Examples menu. for (int i = 0; i < SETTINGS_FILE_LIST.length; i++) { final String str = SETTINGS_FILE_LIST[i]; JMenuItem item = new JMenuItem(str); item.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent e) { loadExampleFile(str); } }); menu.add(item); } } private void loadExampleFile(String resourceName) { // Tries to load one of the examples. resourceName = "edu/hws/eck/mdb/examples/" + resourceName + ".mdb"; ClassLoader cl = getClass().getClassLoader(); URL resourceURL = cl.getResource(resourceName); if (resourceURL != null) { try { InputStream stream = resourceURL.openStream(); DocumentBuilder docReader = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document xmldoc = docReader.parse(stream); retrieveSettingsFromXML(xmldoc); } catch (Exception e) { JOptionPane.showMessageDialog(this,"Internal Error. Couldn't load example\n" + e); } } else JOptionPane.showMessageDialog(this,"Internal Error. Couldn't find file."); } /** * Defines the object that manages the Palette menu. */ private class PaletteManager implements ActionListener{ JRadioButtonMenuItem[] items; // Array contains all the items that are in the Palette menu. int selectedItem = 0; // Index in the items array of the item that is currently selected. private String[] valueStrings = {"Spectrum","PaleSpectrum","Grayscale","ReverseGrayscale", "BlackToRed","RedToCyan","OrangeToBlue"}; // Names for commands in XML settings file. PaletteManager() { // Constructor creates the items and adds them to a ButtonGroup. Also this // object adds itself as an ActionListener to each item so it can carry out // the command when the user selects one of the items. items = new JRadioButtonMenuItem[8]; items[0] = new JRadioButtonMenuItem(I18n.tr("command.palette.spectrum")); items[1] = new JRadioButtonMenuItem(I18n.tr("command.palette.paleSpectrum")); items[2] = new JRadioButtonMenuItem(I18n.tr("command.palette.grayscale")); items[3] = new JRadioButtonMenuItem(I18n.tr("command.palette.reverseGrayscale")); items[4] = new JRadioButtonMenuItem(I18n.tr("command.palette.gradientBlackToRed")); items[5] = new JRadioButtonMenuItem(I18n.tr("command.palette.gradientRedToCyan")); items[6] = new JRadioButtonMenuItem(I18n.tr("command.palette.gradientOrangeToBlue")); items[7] = new JRadioButtonMenuItem(I18n.tr("command.palette.customGradient")); items[selectedItem].setSelected(true); ButtonGroup grp = new ButtonGroup(); for (int i = 0; i < items.length; i++) { grp.add(items[i]); items[i].addActionListener(this); } } void setDefault() { // Selects the default item (item 0) and sets the state of the // MandelbrotDisplay to match; this is used by the Restore All Defaults command. items[0].setSelected(true); selectedItem = 0; owner.getDisplay().setPaletteType(MandelbrotDisplay.PALETTE_SPECTRUM); } String valueAsString() { // Converts the setting of this menu to a string that can be saved // in an XML file. This is used by the currentSettingAsXML() method, // which is used in turn by the Save Params command. if (selectedItem < valueStrings.length) return valueStrings[selectedItem]; else { Color c1 = owner.getDisplay().getGradientPaletteColor1(); Color c2 = owner.getDisplay().getGradientPaletteColor2(); if (c1 == null || c2 == null) return valueStrings[0]; // Should not happen! return "Custom/" + c1.getRed() + "," + c1.getGreen() + "," + c1.getBlue() + "/" + c2.getRed() + "," + c2.getGreen() + "," + c2.getBlue(); } } void setValueFromString(String str) { // Takes a string from an XML file (which originally came from the // previous method when the file was saved) and restores the setting // represented by that string. This is called by the retrieveSettingsFromXML() // method, which is called in turn by the Open Params command for (int i = 0; i < valueStrings.length; i++) { if (valueStrings[i].equalsIgnoreCase(str)) { items[i].setSelected(true); applySelection(); return; } } String[] tokens = explode(str,"/,"); if ( ! tokens[0].equalsIgnoreCase("custom")) throw new IllegalArgumentException(); Color c1 = new Color( Integer.parseInt(tokens[1]), Integer.parseInt(tokens[2]), Integer.parseInt(tokens[3]) ); Color c2 = new Color( Integer.parseInt(tokens[4]), Integer.parseInt(tokens[5]), Integer.parseInt(tokens[6]) ); owner.getDisplay().setGradientPalette(c1, c2); items[7].setSelected(true); selectedItem = 7; } public void actionPerformed(ActionEvent evt) { // Responds to a command by calling the applySelection() method. // The applySelection() method has been factored out of the actionPerformed() // method because it is also used in the setValueFromString() method. applySelection(); } private void applySelection() { // Sets the palette selected in the MandelbrotDisplay to match the // currently selected item in the menu. if (items[0].isSelected()) { owner.getDisplay().setPaletteType(MandelbrotDisplay.PALETTE_SPECTRUM); selectedItem = 0; } else if (items[1].isSelected()) { owner.getDisplay().setPaletteType(MandelbrotDisplay.PALETTE_PALE_SPECTRUM); selectedItem = 1; } else if (items[2].isSelected()) { owner.getDisplay().setPaletteType(MandelbrotDisplay.PALETTE_GRAYSCALE); selectedItem = 2; } else if (items[3].isSelected()) { owner.getDisplay().setPaletteType(MandelbrotDisplay.PALETTE_REVERSE_GRAYSCALE); selectedItem = 3; } else if (items[4].isSelected()) { owner.getDisplay().setGradientPalette(Color.BLACK, Color.RED); selectedItem = 4; } else if (items[5].isSelected()) { owner.getDisplay().setGradientPalette(Color.RED, Color.CYAN); selectedItem = 5; } else if (items[6].isSelected()) { owner.getDisplay().setGradientPalette( new Color(255,130,20), new Color(0,0,255)); selectedItem = 6; } else { // The setting is for a custom gradient. NOTE that this case never occurs when // this method is called from the setValueFromString() method; it only occurs // when called from actionPerformed() in response to a user action. The // command is "Custom gradient", and the response is to show two Color // dialog boxes where the user can pick the start and end color for the // gradient. Note that if the user CANCELS, then the state of the // MandelbrotDisplay is not changed, and the menu must be reset to show // the selection that was in place before the user action so that the // menu will properly reflect the state of the display. This is the // main reason why I keep the current selectedItem in an instance variable. Color c1 = Color.BLACK; Color c2 = Color.WHITE; if (owner.getDisplay().getPaletteType() == MandelbrotDisplay.PALETTE_GRADIENT) { // If the display is already using a gradient palette, then the colors // from that gradient will be used as the initially selected colors in // the color chooser dialog boxes. c1 = owner.getDisplay().getGradientPaletteColor1(); c2 = owner.getDisplay().getGradientPaletteColor2(); } c1 = JColorChooser.showDialog(owner, "Select Gradient Start Color", c1); if (c1 == null) { items[selectedItem].setSelected(true); // Restore previous selection in menu. return; // (The menu selection has been changed by the user } // action, but the value of selectedItem has not changed.) c2 = JColorChooser.showDialog(owner, "Select Gradient End Color", c2); if (c2 == null) { items[selectedItem].setSelected(true); return; } owner.getDisplay().setGradientPalette(c1, c2); selectedItem = 7; } } } // end nested class PaletteManager /** * Defines the object that manages the PaletteLength menu. Similar in * structure to PaletteManager; see above. */ private class PaletteLengthManager implements ActionListener{ int[] standardLengths = { 25, 50, 100, 250, 500, 1000, 2000, 5000, 10000 }; int selectedItem = 0; JRadioButtonMenuItem[] items; PaletteLengthManager() { items = new JRadioButtonMenuItem[ 2 + standardLengths.length ]; items[0] = new JRadioButtonMenuItem(I18n.tr("command.palette.lengthTracksMaxIterations")); for (int i = 0; i < standardLengths.length; i++) items[i+1] = new JRadioButtonMenuItem( I18n.tr("command.palette.length", ""+standardLengths[i])); items[items.length-1] = new JRadioButtonMenuItem(I18n.tr("command.palette.customLength")); items[selectedItem].setSelected(true); ButtonGroup grp = new ButtonGroup(); for (int i = 0; i < items.length; i++) { grp.add(items[i]); items[i].addActionListener(this); } } void setDefault() { selectedItem = 0; owner.getDisplay().setPaletteLength(0); items[0].setSelected(true); } String valueAsString() { return "" + owner.getDisplay().getPaletteLength(); } void setValueFromString(String str) { int length = Integer.parseInt(str); if (length < 0 || length > 500000) throw new IllegalArgumentException(); if (length == 0) { selectedItem = 0; owner.getDisplay().setPaletteLength(0); items[0].setSelected(true); return; } for (int i = 0; i < standardLengths.length; i++) { if (length == standardLengths[i]) { selectedItem = i+1; owner.getDisplay().setPaletteLength(standardLengths[i]); items[i+1].setSelected(true); return; } } items[items.length-1].setSelected(true); owner.getDisplay().setPaletteLength(length); } public void actionPerformed(ActionEvent evt) { if (items[0].isSelected()) { owner.getDisplay().setPaletteLength(0); selectedItem = 0; } else if (items[items.length-1].isSelected()) { String lengthStr = JOptionPane.showInputDialog( I18n.tr("command.palette.customLengthQuestion"), owner.getDisplay().getPaletteLength()); if (lengthStr == null || lengthStr.trim().length() == 0) { items[selectedItem].setSelected(true); return; } try { int length = Integer.parseInt(lengthStr); if (length < 0) throw new NumberFormatException(); if (length > 500000) throw new NumberFormatException(); owner.getDisplay().setPaletteLength(length); selectedItem = items.length - 1; } catch (NumberFormatException e) { JOptionPane.showMessageDialog( owner,I18n.tr("command.palette.customLengthError",lengthStr)); items[selectedItem].setSelected(true); return; } } else { for (int i = 0; i < standardLengths.length; i++) { if (items[i+1].isSelected()) { owner.getDisplay().setPaletteLength(standardLengths[i]); selectedItem = i+1; break; } } } } } // end nested class PaletteLengthManager /** * Defines the object that manages the MaxIterations menu. Similar in * structure to PaletteManager; see above. */ private class MaxIterationsManager implements ActionListener{ int[] standardValues = { 50, 100, 250, 500, 1000, 2000, 5000, 20000, 50000, 100000 }; int selectedItem = 0; JRadioButtonMenuItem[] items; MaxIterationsManager() { items = new JRadioButtonMenuItem[ 1 + standardValues.length ]; for (int i = 0; i < standardValues.length; i++) items[i] = new JRadioButtonMenuItem( I18n.tr("command.maxiterations", ""+standardValues[i])); items[items.length-1] = new JRadioButtonMenuItem(I18n.tr("command.maxiterations.custom")); items[selectedItem].setSelected(true); ButtonGroup grp = new ButtonGroup(); for (int i = 0; i < items.length; i++) { grp.add(items[i]); items[i].addActionListener(this); } } void setEnabled(boolean enable) { for (JRadioButtonMenuItem item : items) item.setEnabled(enable); } void setDefault() { selectedItem = 0; owner.getDisplay().setMaxIterations(standardValues[0]); items[0].setSelected(true); } String valueAsString() { return "" + owner.getDisplay().getMaxIterations(); } void setValueFromString(String str) { int length = Integer.parseInt(str); if (length < 0 || length > 500000) throw new IllegalArgumentException(); for (int i = 0; i < standardValues.length; i++) { if (length == standardValues[i]) { selectedItem = i; owner.getDisplay().setMaxIterations(standardValues[i]); items[i].setSelected(true); return; } } items[items.length-1].setSelected(true); owner.getDisplay().setMaxIterations(length); } public void actionPerformed(ActionEvent evt) { if (items[items.length-1].isSelected()) { String valueStr = JOptionPane.showInputDialog( I18n.tr("command.maxiterations.customQuestion"), owner.getDisplay().getMaxIterations()); if (valueStr == null || valueStr.trim().length() == 0) { items[selectedItem].setSelected(true); return; } try { int value = Integer.parseInt(valueStr); if (value < 0) throw new NumberFormatException(); if (value > 500000) throw new NumberFormatException(); owner.getDisplay().setMaxIterations(value); selectedItem = items.length - 1; } catch (NumberFormatException e) { JOptionPane.showMessageDialog( owner,I18n.tr("command.maxiterations.customError",valueStr)); items[selectedItem].setSelected(true); return; } } else { for (int i = 0; i < standardValues.length; i++) { if (items[i].isSelected()) { owner.getDisplay().setMaxIterations(standardValues[i]); selectedItem = i; break; } } } } } // end nested class MaxIterationsManager } // end class Menus