📄 moviemaker.java
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package sim.util.gui;import java.awt.*;import javax.swing.*;import sim.util.WordWrap;import java.io.*;import java.awt.image.*;/** A class which gives a GUI front-end to sim.util.media.MovieEncoder. You create a MovieMaker by passing in some Frame as a parent. Then you call start(image), where the image is a "typical" sized image for the movie frame. MovieEncoder will then show dialog panels allowing the user to specify where to save the movie and what format and frame rate to use. If the user cancels, then start(image) returns false. Else it returns true and the MovieMaker is ready for action. <p>At this point you can start feeding the MovieMaker frames with add(image). When you are finished, call stop() and the MovieMaker will flush out the remaining movie frames to disk and create the file. Throw your MovieMaker away at this point. <p>MovieMaker, like MovieEncoder, relies on the Java Media Framework (JMF) to do its magic. If JMF doesn't exist, MovieMaker doesn't produce an error; instead, it will produce a dialog box informing the user of his mistake. MovieMaker is coded in an odd way: no actual direct references are made to MovieEncoder. This is in case the JVM is too smart and tries to load MovieEncoder (and the JMF) immediately rather than lazily as it gets referenced by MovieMaker.*/public class MovieMaker { Frame parentForDialogs; Object encoder; Class encoderClass; boolean isRunning; public MovieMaker(Frame parent) { this.parentForDialogs = parent; try { encoderClass = Class.forName("sim.util.media.MovieEncoder"); } catch (Throwable e) { encoderClass = null; } // JMF's not installed } /** Create a dialog box allowing the user to specify where to save the file, and in what format and frame rate (default = 10 frames per second), and set up the movie encoding process ready to go, using typicalImage as an example image (for size purposes). Return false if failed to start. */ public synchronized boolean start(BufferedImage typicalImage) { return start(typicalImage, 10f); } /** Create a dialog box allowing the user to specify where to save the file, and in what format and frame rate (default provided), and set up the movie encoding process ready to go, using typicalImage as an example image (for size purposes). Return false if failed to start. */ public synchronized boolean start(BufferedImage typicalImage, float fps) { if (isRunning) return false; int encodeFormatIndex = 0; try { // get the list of supported formats Object[] f = (Object[]) encoderClass. getMethod("getEncodingFormats", new Class[] {Float.TYPE, BufferedImage.class}). invoke(null, new Object[] { new Float(fps), typicalImage }); if (f==null) return false; // init the dialog panel JPanel p = new JPanel(); p.setLayout(new BorderLayout()); // Word-wrap the format names for display String[] fmts = new String[f.length]; // get the standard font String font = p.getFont().getFamily(); // ultimate classy list mode for(int i=0; i<fmts.length; i++) fmts[i] = "<html><font face=\"" + font + "\" size=\"-2\">" + WordWrap.toHTML(WordWrap.wrap(f[i].toString(), 40)) + "</font></html>"; // add widgets JTextField framerate = new JTextField(""+fps); JPanel panel = new JPanel(); panel.setLayout(new BorderLayout()); panel.setBorder(new javax.swing.border.TitledBorder("Frame Rate")); panel.add(framerate, BorderLayout.CENTER); JPanel panel2 = new JPanel(); panel2.setLayout(new BorderLayout()); panel2.setBorder(new javax.swing.border.TitledBorder("Format")); JComboBox encoding = new JComboBox(fmts); panel2.add(encoding, BorderLayout.CENTER); p.add(panel, BorderLayout.NORTH); p.add(panel2, BorderLayout.SOUTH); // ask if(JOptionPane.showConfirmDialog(parentForDialogs, p,"Create a Quicktime Movie...", JOptionPane.OK_CANCEL_OPTION) != JOptionPane.OK_OPTION) return false; // get the selected fps and format fps = Float.valueOf(framerate.getText()).floatValue(); encodeFormatIndex = encoding.getSelectedIndex(); // OK so now we have the index // ok, so now that the correct frames per second is available and the index of the // format with the right color depth etc. is known, re-query // in order to get a composite format that has both the correct fps and color depth f = (Object[])encoderClass. getMethod("getEncodingFormats", new Class[] {Float.TYPE, BufferedImage.class}). invoke(null, new Object[] { new Float(fps), typicalImage }); // now choose the same one as before but with the fps // And we hope that the same encoding formats show up with the different framerate's query-- // this should always be true // end dan mods FileDialog fd = new FileDialog(parentForDialogs,"Stream to Quicktime File...", FileDialog.SAVE); fd.setFile("Untitled.mov"); fd.show(); if (fd.getFile()!=null) { // encoder = new sim.util.media.MovieEncoder(fps, // frames per second // new File(fd.getDirectory(), ensureFileEndsWith(fd.getFile(),".mov")), // typicalImage, // (javax.media.Format)f[encodeFormatIndex]); encoder = encoderClass.getConstructor(new Class[]{ Float.TYPE, File.class, BufferedImage.class, Class.forName("javax.media.Format") }). newInstance(new Object[]{new Float(fps), new File(fd.getDirectory(), ensureFileEndsWith(fd.getFile(),".mov")), typicalImage, f[encodeFormatIndex]}); } else return false; } catch (Throwable e) // (NoClassDefFoundError e) // uh oh, JMF's not installed { e.printStackTrace(); Object[] options = {"Oops"}; JOptionPane.showOptionDialog( parentForDialogs, "JMF is not installed on your computer.\nTo create Quicktime movies of your simulation:\n\n" + "1. Download JMF at http://java.sun.com/products/java-media/jmf/\n" + "2. Mac users should download the \"Cross-platform Java\" version\n" + "3. Install the JMF libraries.\n" + "4. Make certain that the jmf.jar file is in your CLASSPATH.\n", "Java Media Framework (JMF) Not Installed", JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE, null, options, options[0]); encoder = null; isRunning = false; return false; } isRunning = true; return true; } /** Add an image to the movie stream. Do this only after starting. */ public synchronized boolean add(BufferedImage image) { if (!isRunning) return false; // ((sim.util.media.MovieEncoder)encoder).add(image); { try // NOT LIKELY TO HAPPEN { encoderClass.getMethod("add", new Class[]{BufferedImage.class}). invoke(encoder, new Object[]{image}); } catch(Exception ex) { ex.printStackTrace(); return false; } } return true; } /** End the movie stream, finish up writing to disk, and clean up. */ public synchronized boolean stop() { boolean success = true; if (!isRunning) return false; // not running -- why stop? try { // ((sim.util.media.MovieEncoder)encoder).stop(); success = ((Boolean)(encoderClass.getMethod("stop", new Class[0]).invoke(encoder, new Object[0]))).booleanValue(); } catch(Exception ex) // NOT LIKELY TO HAPPEN { ex.printStackTrace(); return false; } isRunning = false; return success; } // Utility method. Returns a filename guaranteed to end with the given ending. static String ensureFileEndsWith(String filename, String ending) { // do we end with the string? if (filename.regionMatches(false,filename.length()-ending.length(),ending,0,ending.length())) return filename; else return filename + ending; } }⌨️ 快捷键说明
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