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Photoscoop.java
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Photoscoop.java
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import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
/**
* Main Graphical User Interface (GUI) class for Photoscoop You do not need to
* modify this class. You are welcome to peruse it to see 'how-it-works' or
* re-use it for your own purposes.
*
* @author angrave
*/
public class Photoscoop {
/**
* CLASS VARIABLES. These are our 'globals'. There is only one mainframe in
* the whole application *.
*
*/
static JFrame mainFrame; // the main window
/**
* The current open/save as file chooser For Vista (Fall2008) use static
* JFileChooser chooser=null;
*/
static JFileChooser chooser = null;
/**
* Want to get the image associated with each window. A map is one way to do
* this. More about maps in CS225 (Data structures)
*/
static Map<JFrame, BufferedImage> frameMap = new HashMap<JFrame, BufferedImage>();
/**
* The current background window for merge / key operations.
*/
static JFrame backgroundFrame;
/**
* Remember the original pixel values and the last window changed, in case
* we want to 'undo' the last change.
*/
static int[][] sourcePixels;
static JFrame lastSourceFrame;
/** CLASS METHODS (static methods) follow * */
/**
* Attempts to create a FileChooser object. This may fail for Vista
* Professional users where some standard directories have been removed. See
*
*/
static void createFileChooser() {
try {
if(chooser == null)
chooser = new JFileChooser();
} catch (Exception ex) {
System.out.println("Failed to create JFileChooser:" + ex.getMessage());
ex.printStackTrace();
JOptionPane.showMessageDialog(null,"Sorry selecting files and directories is not supported on your operating system. Photoscoop.java");
// See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6544857
// Fixed in JDK6 update 18
}
}
/**
* The main entry point for the program. By default all jpg images insde
* testImages/ subdirectory are opened.
*/
public static void main(String[] args) {
File[] files = new File("testimages").listFiles();
for (File f : files) {
String name = f.getName().toLowerCase();
if (name.endsWith(".jpg") || name.endsWith(".png"))
openImageFile(f.getPath());
}
}
/**
* Opens a file and displays the image. This method is used by main and open
* item.
*
* @param filename
* the file to be opened
*/
private static void openImageFile(String filename) {
// Delegate the problem of reading the filename to another method!
BufferedImage img = ImageUtilities.loadImage(filename);
if (img == null) {
JOptionPane.showMessageDialog(null, filename + " could not be opened.");
} else
openImage(img, filename); // create the window with a title - see
// below
}
/**
* Creates a window ('jframe') and performs the necessary voodoo to display
* the window and a menu too.
*/
private static void openImage(BufferedImage img, String title) {
JFrame frame = new JFrame();
frame.setLocationByPlatform(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle(title);
addMenus(frame);
setImageForFrame(frame, img);
frame.pack(); // calculate its size
frame.setVisible(true); // display it
}
private static void setImageForFrame(JFrame frame, BufferedImage img) {
// We track the mapping between a frame and an image
frameMap.put(frame, img);
frame.getContentPane().removeAll();
// remove the old image (if it exists)
// wrap the image up as an ImageIcon inside a JLabel...
JLabel label;
if (img != null)
label = new JLabel(new ImageIcon(img));
else
label = new JLabel("No image");
// And add the label to the frame:
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.pack(); // auto resize if the img has changed size
}
/**
* Add drop-down menus to the JFrame
*
* @param frame
*/
public static void addMenus(final JFrame frame) {
JMenuBar menubar = new JMenuBar();
JMenu fileMenu = new JMenu("File");
JMenu editMenu = new JMenu("Edit");
JMenu effectsMenu = new JMenu("Effects");
JMenu combineMenu = new JMenu("Combine");
JMenu stenographyMenu = new JMenu("Stenography");
menubar.add(fileMenu);
menubar.add(editMenu);
menubar.add(effectsMenu);
menubar.add(combineMenu);
menubar.add(stenographyMenu);
JMenuItem openItem = new JMenuItem("Open");
JMenuItem saveAsItem = new JMenuItem("SaveAs");
JMenuItem quitItem = new JMenuItem("Exit");
JMenuItem backgroundItem = new JMenuItem("Use as background");
JMenuItem undoItem = new JMenuItem("Undo");
JMenuItem copyItem = new JMenuItem("Copy");
JMenuItem pasteItem = new JMenuItem("Paste");
JMenuItem captureScreenItem = new JMenuItem("Capture Screen");
fileMenu.add(openItem);
fileMenu.add(saveAsItem);
fileMenu.add(quitItem);
editMenu.add(copyItem);
editMenu.add(pasteItem);
editMenu.add(captureScreenItem);
editMenu.add(undoItem);
combineMenu.add(backgroundItem);
/*
* Inner anonymous classes hold the code to perform the operation.
*/
quitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
frame.setVisible(false);
frame.dispose();
System.exit(0);
}
});
openItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
createFileChooser();
if (chooser != null && chooser.showOpenDialog(frame) == JFileChooser.APPROVE_OPTION)
openImageFile(chooser.getSelectedFile().getPath());
}
});
captureScreenItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
BufferedImage img = ImageUtilities.captureScreen();
if (img != null)
openImage(img, "screen-capture");
}
});
saveAsItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
createFileChooser();
if (chooser != null && chooser.showSaveDialog(frame) == JFileChooser.APPROVE_OPTION)
try {
File file = chooser.getSelectedFile();
if (!file.exists())
ImageUtilities.saveImage(frameMap.get(frame), file);
else
JOptionPane.showMessageDialog(frame, "Sorry Dave, I do not overwrite existing files");
} catch (IOException e) {
e.printStackTrace();
}
}
});
/*
* The effect workhorse / glue. Make a new effectAction object and use
* it for all of the effects.
*/
ActionListener effectAction = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String cmd = ((JMenuItem) (ae.getSource())).getText();
System.out.println("Action=" + cmd);
BufferedImage sourceImage = frameMap.get(frame);
sourcePixels = ImageUtilities.getRGBPixels(sourceImage);
lastSourceFrame = frame;
int[][] background = ImageUtilities.getRGBPixels(frameMap.get(backgroundFrame));
if (background == null)
background = new int[sourcePixels.length][sourcePixels[0].length];
int[][] result = Effects.process(cmd, sourcePixels, background);
// a new image is required if it's been resized
sourceImage = ImageUtilities.setRGBPixels(sourceImage, result);
setImageForFrame(frame, sourceImage);
}
};
backgroundItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
backgroundFrame = frame;
}
});
undoItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (lastSourceFrame != null && sourcePixels != null) {
BufferedImage sourceImage = frameMap.get(lastSourceFrame);
int[][] tmp = ImageUtilities.getRGBPixels(sourceImage);
sourceImage = ImageUtilities.setRGBPixels(sourceImage, sourcePixels);
setImageForFrame(lastSourceFrame, sourceImage);
sourcePixels = tmp;
}
}
});
copyItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
ImageUtilities.setClipboardImage(frameMap.get(frame));
}
});
pasteItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
BufferedImage image = ImageUtilities.getClipboardImage();
if (image != null)
openImage(image, "");
}
});
for (String name : new String[] { "half", "rotate", "flip", "mirror", "redeye", "funky" }) {
JMenuItem item = new JMenuItem(name);
item.addActionListener(effectAction);
effectsMenu.add(item);
}
for (String name : new String[] { "resize", "merge", "key" }) {
JMenuItem item = new JMenuItem(name);
item.addActionListener(effectAction);
combineMenu.add(item);
}
for (String name : new String[] { "hide", "extract" }) {
JMenuItem item = new JMenuItem(name);
item.addActionListener(effectAction);
stenographyMenu.add(item);
}
frame.setJMenuBar(menubar);
frame.pack();
}
} // end class