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Tenbergen [ http://www.tenbergen.org | nanoprobe19@gmx.net ] * Date: 2007-09-27 */ package edu.oswego.hci.hci520.slideshow; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JLabel; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.Timer; import javax.swing.JFileChooser; import java.awt.FlowLayout; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.util.Vector; /** * A simple GUI class for a slide show. Takes care of image IO and program logic, too. * @author B. Tenbergen [ http://www.tenbergen.org | nanoprobe19@gmx.net ] * @version 2007-09-27 * @since 2007-09-27 */ public class SlideShowGUI extends JFrame { //buttons to control the program private JButton open; private JButton next; private JButton prev; private JButton start; private JButton pause; private JButton reset; //picturelabel will contain the picture and status messages private PictureLabel picture; //contains all buttons private JPanel control; //changes the slides after timeout occurs private Timer timer; //contains the paths and file names to some pictures private Vector pictures; //a pointer indicating which picture we are currently looking at private int currentPicture = -1; //some status messages private final String STARTTEXT = "Use the \"open\" button to open a picture folder."; private final String ENDREACHED = "End of slide show reached. Start over with \"reset\" of choose different folder with \"open\"."; private final String BEGREACHED = "Beginning of slide show reached. Start over with \"reset\" of choose different folder with \"open\"."; private final String OPENSUCCES = "Folder loaded successfully. Use \"start\" or \"next\" to view pictures."; /** * Constructs a new Slide Show GUI. Also assigns all eventhandlers * to all buttons and the timer. */ public SlideShowGUI() { //initialize the collection that holds references //to the pictures pictures = new Vector(); //initialize the timer and add the eventhandler timer = new Timer(2000, new ActionListener() { public void actionPerformed(ActionEvent e) { picture.setText(""); try { ++currentPicture; picture.setPicture(pictures.get(currentPicture)); } catch (ArrayIndexOutOfBoundsException aioobe) { if (currentPicture > pictures.size()) currentPicture = pictures.size(); picture.setIcon(new ImageIcon()); picture.setText(ENDREACHED); timer.stop(); } } }); //initialize the open button open = new JButton(new ImageIcon(getClass().getResource("res/open.png"))); open.setToolTipText("Open"); open.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser chooser = new JFileChooser(); chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); int returnVal = chooser.showOpenDialog(open); if(returnVal == JFileChooser.APPROVE_OPTION) { pictures.removeAllElements(); currentPicture = -1; loadPictures(chooser.getSelectedFile()); picture.setIcon(new ImageIcon()); picture.setText(OPENSUCCES); } } }); //initialize the next button next = new JButton(new ImageIcon(getClass().getResource("res/next.png"))); next.setToolTipText("Next"); next.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { picture.setText(""); try { ++currentPicture; picture.setPicture(pictures.get(currentPicture)); } catch (ArrayIndexOutOfBoundsException aioobe) { if (currentPicture > pictures.size()) currentPicture = pictures.size(); picture.setIcon(new ImageIcon()); picture.setText(ENDREACHED); } } }); //initialize the previous button prev = new JButton(new ImageIcon(getClass().getResource("res/prev.png"))); prev.setToolTipText("Previous"); prev.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { picture.setText(""); try { --currentPicture; picture.setPicture(pictures.get(currentPicture)); } catch (ArrayIndexOutOfBoundsException aioobe) { if (currentPicture < 0) currentPicture = -1; picture.setIcon(new ImageIcon()); picture.setText(BEGREACHED); } } }); //initialize the start button start = new JButton(new ImageIcon(getClass().getResource("res/start.png"))); start.setToolTipText("Start"); start.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { picture.setText(""); timer.start(); } }); //initialize the pause button pause = new JButton(new ImageIcon(getClass().getResource("res/pause.png"))); pause.setToolTipText("Pause"); pause.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { timer.stop(); picture.setPicture(pictures.get(currentPicture)); } }); //initialize the reset button reset = new JButton(new ImageIcon(getClass().getResource("res/reset.png"))); reset.setToolTipText("Reset"); reset.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { timer.stop(); picture.setText(""); currentPicture = 0; picture.setPicture(pictures.get(currentPicture)); } }); //make sure all buttons are in center of top row control = new JPanel(new FlowLayout(FlowLayout.CENTER)); control.add(open); control.add(prev); control.add(start); control.add(pause); control.add(reset); control.add(next); //make sure picture and status msgs appear in middle picture = new PictureLabel(STARTTEXT); picture.setHorizontalAlignment(JLabel.CENTER); picture.setHorizontalTextPosition(JLabel.CENTER); //set layout properties this.setLayout(new BorderLayout()); this.add(control, BorderLayout.NORTH); this.add(picture, BorderLayout.CENTER); //set of rest of the JFrame options this.setTitle("Basti's Super Slide Show Sensation"); this.setSize(800, 600); this.setLocationRelativeTo(null); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } /** * Parses a path to a directory and reads all jpg, jpeg, gif and png files * recursively from the dir structure and adds them to the collection. * @param path Path to a parent directory that recursively contains pictures */ private void loadPictures(File path) { File[] files = path.listFiles(); for (int i = 0; i < files.length; i++) { if (files[i].isDirectory()) loadPictures(files[i]); else { if (files[i].getName().toLowerCase().endsWith("jpg") || files[i].getName().toLowerCase().endsWith("jpeg") || files[i].getName().toLowerCase().endsWith("gif") || files[i].getName().toLowerCase().endsWith("png") ) { String filename = files[i].getPath().replace(File.separatorChar, '/').toLowerCase(); pictures.add(filename); } } } } /** * Start the program * @param args n/A */ public static void main(String[] args) { new SlideShowGUI(); } }PK #}D7}=s2edu/oswego/hci/hci520/slideshow/PictureLabel.class1J,edu/oswego/hci/hci520/slideshow/PictureLabeljavax/swing/JLabelimageURLLjava/lang/String;(Ljava/lang/String;)VCode  LineNumberTableLocalVariableTablethis.Ledu/oswego/hci/hci520/slideshow/PictureLabel;s setPicture     resizePicture+(Ljava/lang/String;)Ljavax/swing/ImageIcon;  setIcon(Ljavax/swing/Icon;)Vii java/io/File  !#"javax/imageio/ImageIO $%read.(Ljava/io/File;)Ljava/awt/image/BufferedImage; ' ()getWidth()I + ,) getHeight .'/java/awt/image/BufferedImage .+2javax/swing/ImageIcon .4 56getScaledInstance(III)Ljava/awt/Image; 18 9(Ljava/awt/Image;)V;java/io/IOExceptionfilenameoldImageLjava/awt/image/BufferedImage;ioeLjava/io/IOException; target_widthI target_heightoldWidth oldHeightnewWidth newHeight SourceFilePictureLabel.java! >*+  "#  N*+*** +,-  f |+Y+ MN*&>**6,-6,0616ok6"**6ok6 661Y,37: F59:=AB#C)D/H5I8KENLORQcVgWk\ ||<=>d=>?@_AB#YCB)SDB/MEB8+FBgFBEGBkGBHIPK "}D7w 1edu/oswego/hci/hci520/slideshow/PictureLabel.java/* * PictureLabel.java * Author: B. Tenbergen [ http://www.tenbergen.org | nanoprobe19@gmx.net ] * Date: 2007-09-27 */ package edu.oswego.hci.hci520.slideshow; import javax.swing.JLabel; import javax.swing.ImageIcon; //import java.awt.Graphics; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; /** * This class essentially is a Image-enabled JLabel with some * special functionality to resize pictures maintining the aspect * ratio. * @author B. Tenbergen [ http://www.tenbergen.org | nanoprobe19@gmx.net ] * @version 2007-09-27 * @since 2007-09-27 */ public class PictureLabel extends JLabel { //the path name to the picture private String imageURL; /** * Constructs a new JLabel. Does not take care of any image functionality. * @param s Some text that appears on the Label as well. */ public PictureLabel(String s) { super(s); } /** * Sets an image into the JLabel and resizes it to fit the * entire JLabel * @param ii The path to the image. */ protected void setPicture(String ii) { imageURL = ii; this.setIcon(resizePicture(imageURL)); } /** * Resizes a picture, if necessary, maintaining the aspect ratio. * @param filename A fully qualified path to a file that is an image. * @return a new ImageIcon made from the resized picture that can be placed into the JLabel */ public ImageIcon resizePicture(String filename) { if (filename == null) return null; //read in the image BufferedImage oldImage; try { oldImage = ImageIO.read(new File(filename)); } catch (IOException ioe) { //should never occur since only valid filenames are passed //to this method return null; } //some variables to reduce the computation overhead int target_width = this.getWidth(); int target_height = this.getHeight(); int oldWidth = oldImage.getWidth(); int oldHeight = oldImage.getHeight(); int newWidth, newHeight; //if picture is larger than the target size... if (oldWidth > target_width){ newWidth = target_width; //...stretch height maintining aspect ratio newHeight = ((int) (((double) target_width / (double) oldWidth) * oldHeight)); //if it is a portrait rather than a landscape... if (oldWidth < oldHeight) { newHeight = this.getHeight(); //...stretch width instead of height newWidth = ((int) (((double) target_height / (double) oldHeight) * oldWidth)); } } //do not change picture resolution if picture is smaller than the target else { newWidth = oldWidth; newHeight = oldHeight; } //create a new image icon from the rescaled image //and return it. 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