Help with image viewer
Would love some help with this one.. I am new so please bare with me. This app just reads contents of a txt file. What I am trying to add is the ability to display an image inside the program frame with scrolls bars.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class Viewer extends JFrame
private JMenuBar menuBar;
private JMenu fileMenu;
private JMenu fontMenu;
private JMenuItem newItem;
private JMenuItem openItem;
private JMenuItem saveItem;
private JMenuItem saveAsItem;
private JMenuItem exitItem;
private JRadioButtonMenuItem monoItem;
private JRadioButtonMenuItem serifItem;
private JRadioButtonMenuItem sansSerifItem;
private JCheckBoxMenuItem italicItem;
private JCheckBoxMenuItem boldItem;
private String filename;
private JTextArea editorText;
private JLabel label;
private final int NUM_LINES = 20;
private final int NUM_CHARS = 40;
public Viewer()
setTitle("Viewer");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
editorText = new JTextArea(NUM_LINES, NUM_CHARS);
editorText.setLineWrap(true);
editorText.setWrapStyleWord(true);
JScrollPane scrollPane = new JScrollPane(editorText);
add(scrollPane);
buildMenuBar();
pack();
setVisible(true);
private void buildMenuBar()
buildFileMenu();
buildFontMenu();
menuBar = new JMenuBar();
menuBar.add(fileMenu);
menuBar.add(fontMenu);
setJMenuBar(menuBar);
private void buildFileMenu()
newItem = new JMenuItem("New");
newItem.setMnemonic(KeyEvent.VK_N);
newItem.addActionListener(new NewListener());
openItem = new JMenuItem("Open");
openItem.setMnemonic(KeyEvent.VK_O);
openItem.addActionListener(new OpenListener());
saveItem = new JMenuItem("Save");
saveItem.setMnemonic(KeyEvent.VK_S);
saveItem.addActionListener(new SaveListener());
saveAsItem = new JMenuItem("Save As");
saveAsItem.setMnemonic(KeyEvent.VK_A);
saveAsItem.addActionListener(new SaveListener());
exitItem = new JMenuItem("Exit");
exitItem.setMnemonic(KeyEvent.VK_X);
exitItem.addActionListener(new ExitListener());
fileMenu = new JMenu("File");
fileMenu.setMnemonic(KeyEvent.VK_F);
fileMenu.add(newItem);
fileMenu.add(openItem);
fileMenu.addSeparator();
fileMenu.add(saveItem);
fileMenu.add(saveAsItem);
fileMenu.addSeparator();
fileMenu.add(exitItem);
private void buildFontMenu()
monoItem = new JRadioButtonMenuItem("Monospaced");
monoItem.addActionListener(new FontListener());
serifItem = new JRadioButtonMenuItem("Serif");
serifItem.addActionListener(new FontListener());
sansSerifItem =
new JRadioButtonMenuItem("SansSerif", true);
sansSerifItem.addActionListener(new FontListener());
ButtonGroup group = new ButtonGroup();
group.add(monoItem);
group.add(serifItem);
group.add(sansSerifItem);
italicItem = new JCheckBoxMenuItem("Italic");
italicItem.addActionListener(new FontListener());
boldItem = new JCheckBoxMenuItem("Bold");
boldItem.addActionListener(new FontListener());
fontMenu = new JMenu("Font");
fontMenu.setMnemonic(KeyEvent.VK_T);
fontMenu.add(monoItem);
fontMenu.add(serifItem);
fontMenu.add(sansSerifItem);
fontMenu.addSeparator();
fontMenu.add(italicItem);
fontMenu.add(boldItem);
private class NewListener implements ActionListener
public void actionPerformed(ActionEvent e)
editorText.setText("");
filename = null;
private class OpenListener implements ActionListener
public void actionPerformed(ActionEvent e)
int chooserStatus;
JFileChooser chooser = new JFileChooser();
chooserStatus = chooser.showOpenDialog(null);
if (chooserStatus == JFileChooser.APPROVE_OPTION)
File selectedFile = chooser.getSelectedFile();
filename = selectedFile.getPath();
if (!openFile(filename))
JOptionPane.showMessageDialog(null,
"Error reading " +
filename, "Error",
JOptionPane.ERROR_MESSAGE);
private boolean openFile(String filename)
boolean success;
String inputLine, editorString = "";
FileReader freader;
BufferedReader inputFile;
label = new JLabel();
add(label);
try
freader = new FileReader(filename);
inputFile = new BufferedReader(freader);
inputLine = inputFile.readLine();
while (inputLine != null)
editorString = editorString +
inputLine + "\n";
inputLine = inputFile.readLine();
editorText.setText(editorString);
inputFile.close();
success = true;
catch (IOException e)
success = false;
return success;
private class SaveListener implements ActionListener
public void actionPerformed(ActionEvent e)
int chooserStatus;
if (e.getActionCommand() == "Save As" ||
filename == null)
JFileChooser chooser = new JFileChooser();
chooserStatus = chooser.showSaveDialog(null);
if (chooserStatus == JFileChooser.APPROVE_OPTION)
File selectedFile =
chooser.getSelectedFile();
filename = selectedFile.getPath();
if (!saveFile(filename))
JOptionPane.showMessageDialog(null,
"Error saving " +
filename,
"Error",
JOptionPane.ERROR_MESSAGE);
private boolean saveFile(String filename)
boolean success;
String editorString;
FileWriter fwriter;
PrintWriter outputFile;
try
fwriter = new FileWriter(filename);
outputFile = new PrintWriter(fwriter);
editorString = editorText.getText();
outputFile.print(editorString);
outputFile.close();
success = true;
catch (IOException e)
success = false;
return success;
private class ExitListener implements ActionListener
public void actionPerformed(ActionEvent e)
System.exit(0);
private class FontListener implements ActionListener
public void actionPerformed(ActionEvent e)
Font textFont = editorText.getFont();
String fontName = textFont.getName();
int fontSize = textFont.getSize();
int fontStyle = Font.PLAIN;
if (monoItem.isSelected())
fontName = "Monospaced";
else if (serifItem.isSelected())
fontName = "Serif";
else if (sansSerifItem.isSelected())
fontName = "SansSerif";
if (italicItem.isSelected())
fontStyle += Font.ITALIC;
if (boldItem.isSelected())
fontStyle += Font.BOLD;
editorText.setFont(new Font(fontName,
fontStyle, fontSize));
public static void main(String[] args)
Viewer ve = new Viewer();
}I tried using JLabel() but I cant seem to make it work. Whenever i browse and select a .jpg it displays "�������t���o\�[��+�p��B3�+�p��B3�"
In the future, Swing related questions should be posted in the Swing forum.
Whenever i browse and select a .jpg it displays "�������t���o\�[��+�p��B3�+�p��B3�" You can read in a jpg file and treat it like a text file.
Read the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/icon.html]How to Use Icons for the proper way to read images.
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BLUE MONDAY EXCLUSIVES
Date: Sat, 17 Apr 2010 20:23:27 -0600
From: [email protected]
To: [email protected]
Subject: Re: Help with image ready on ps3 extended
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[AS]
stop();
loaderInfo.addEventListener(ProgressEvent.PROGRESS, updatePreLoader);
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nextFrame ();
[/AS]
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Here is the code:
[AS]
stop();
import fl.transitions.Tween;
import fl.transitions.easing.*
import fl.transitions.TweenEvent;
import flash.display.MovieClip;
import flash.events.MouseEvent;
var sep3Tween4:Tween = new Tween(Sep2_mc, "y", Regular.easeOut,338 , 655, 1, true);
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BoyBack.addEventListener(MouseEvent.CLICK, Portfolioclick);
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removeChild(B);
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BoyBackTween.addEventListener(TweenEvent.MOTION_FINISH, onfinis);
function onfinis(e:TweenEvent):void {
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B.addChild(imgLoader);
for (var i:uint=0; i<arrayB.length; i++){
arrayB[i].mouseChildren = false;
arrayB[i].addEventListener( MouseEvent.MOUSE_OVER, onButtonOver);
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arrayB[i].addEventListener( MouseEvent.CLICK, onButtonRemoveB);
arrayB[i].addEventListener( MouseEvent.CLICK, onButtonClick);
arrayB[i].imgNum = i;
imgLoader.y = 100;
imgLoader.x =275;
B.y = -55;
B.x =-100;
function onButtonOver( e:MouseEvent ):void {
var B:MovieClip = MovieClip(e.target);
if(B.tween){
B.tween.stop();
B.tween = new Tween( B, "y", Regular.easeOut,600, 591, .5, true );
function onButtonOut( e:MouseEvent ):void {
var B:MovieClip = MovieClip(e.target);
if( B.tween ){
B.tween.stop();
B.tween = new Tween( B, "y", Regular.easeOut, 591, 600, 1, true );
function onButtonRemoveB( e:MouseEvent ):void {
removeChild(TwoDtxt);
function onButtonClick( e:MouseEvent ):void {
if(this.contains(B)){
removeChild(B);
imgLoader.load(new URLRequest(arrayImages[e.currentTarget.imgNum]));
imgLoader.contentLoaderInfo.addEventListener( Event.COMPLETE , loaded);
function loaded(event:Event):void {
addChild(B);
var targetLoader:Loader = Loader(event.target.loader);
var AlphaTween1:Tween = new Tween(T1, "alpha", Strong.easeOut, 1, .20, 2.5, true);
var AlphaTween2:Tween = new Tween(Bottom1, "alpha", Strong.easeOut, 1, .20, 2.5, true);
[/AS]
Before the image loads if you were to click on the boy with the balloon"the back button" the image would than load later on say the"portfolio" part of the site. -
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The first one is what it SHOULD be, I don't know why it's converting it to the second one... could be a server related issue regarding character sets that I don't quite understand yet but I'm learning! -
Help with live view new camera options...
Hey guys...I have recently bought a hahnel remote shutter release so that I can take pics on the top of a mast around seven metres up.
I have a 5 inch monitor at ground level to view the pictures taken, using an av cable from the camera. Problem is, I cant get a continuous "live view" image on the monitor, as you need to hold down the * button whilst in live view to auto focus, so I have to put up with just the shot thats been taken showing up after each shot instead!
Does anyone know of a canon that would offer a continuous live view image on my monitor, without having to press the * button to auto focus?
Ideally it would be one from the list below, as they are the cameras that my new hahnel wireless remote supports!
I hope someone can help! cheers!
List of supported cameras...would any of these offer live view without the need to press * to autofocus and take a shot:
Compatible Camera Models:
EOS 1200D / 1100D / 1000D / 650D / 600D / 550D /500D / 450D / 400D / 350D / 300D /
70D / 60D / 50D / 40D / 30D / 20D / 20Ds /
10D / 7D / 6D / 5D / 5D Mark II / 5D Mark III
1D / 1DX / 1DC / 1Ds Mark III / 1Ds Mark IV
SX50HS
Powershot G10 / G11 / G12 / G15 / G1X Mk II
Pentax Pentax K-5 II / K-5 IIs / K-5 / K-7 / K10 / K20 / K50 / K100 /
K200 / K500
Samsung GX10 / GX20What camera are you using? Most "modern" Canon SLRs allow you to set focus during live view. You move a little rectangle around to select your focus area. But you need more than a monitor, you'd either need a computer (like a small netbook) running EOS Utility, or a tablet with DSLR Remote or equivilent on it. The 70D and 6D both have WiFi ability, so you can do it from a smart phone, tablet, or computer, no wires needed.
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I have refered to this thread to help me create my background image.
http://forum.java.sun.com/thread.jspa?threadID=599393&messageID=3196643
However I am stuck mostly because of not really fully grasping all the objects and how they work yet.
Basically right now I have a JFrame and then I have a container which I put all my objects in.
First question:
What exactly does the following line of code do?
Container contentPane = getContentPane();
Does the "getContentPane()" method get the JFrame, since this is the class this line of code is embedded in?
It sets contentPane which is a container to the JFrame?
Second question...
So using the above link I created a class called BackgroundImage and it works ...sort of. I have two windows - one is my JFrame game and the other is this background frame.
Now I knew this would happen and I realize what I am supposed to do but I have been unsuccessful. Basically I need to make this JPanel my contentPane right?
But when I say something like
JPanel contentPane = panel my JFrame has nothing in it...
How do I take this seperate window and incorporate it into what I already have.
I want to use the contentPane variable since this is the variable where everything gets added throughout the code? I can't seem to get the JPanel to work.
Take a look at some code snippets:
public class DungMast extends JFrame
/** Creates a new instance of EventPress */
public DungMast() {
Animation_Complete=false;
Current_Level = 1;
Level_Complete = false;
CreateUserInterface();
JPanel panel = new JPanel()
protected void paintComponent(Graphics g)
// Dispaly image at at full size
g.drawImage(img_BG.getImage(), 0, 0, null);
// Scale image to size of component
// Dimension d = getSize();
// g.drawImage icon.getImage(), 0, 0, d.width, d.height, null);
// Fix the image position in the scroll pane
// Point p = scrollPane.getViewport().getViewPosition();
// g.drawImage(icon.getImage(), p.x, p.y, null);
super.paintComponent(g);
panel.setOpaque( false );
panel.setPreferredSize( new Dimension(400, 400) );
scrollPane = new JScrollPane( panel );
getContentPane().add( scrollPane );
JButton button = new JButton( "Hello" );
panel.add( button );
} //end constructor for main JFrame
//Then I have something like
JPanel contentPane = panel;
}What exactly does the following line of code do?
Container contentPane = getContentPane();
It gets the content pane for the JFrame and saves a reference to it for later use, viz,
the reference "contentPane" can be used to call methods in the Container class.
Lightweight (Swing) top–level containers have a content pane that holds the child
components for the parent container. See the comments section of the JRootPane class api
for a birds–eye view.
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class BackgroundImage {
private JPanel getContent(BufferedImage image) {
// Make up our own content pane with an image
// in the background.
ContentPanel cp = new ContentPanel(image);
// Add some components.
cp.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.weightx = 1.0;
gbc.weighty = 1.0;
for(int j = 0; j < 10; j++) {
gbc.gridwidth = (j+1)%3 == 0 ? gbc.REMAINDER : 1;
cp.add(new JButton(String.valueOf(j+1)), gbc);
return cp;
public static void main(String[] args) throws IOException {
BufferedImage image = ImageIO.read(new File("images/cougar.jpg"));
BackgroundImage test = new BackgroundImage();
JFrame f = new JFrame();
System.out.println("Default contentPane = " +
f.getContentPane().getClass().getName());
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(test.getContent(image));
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
class ContentPanel extends JPanel {
BufferedImage image;
public ContentPanel(BufferedImage image) {
this.image = image;
// This is required for JComponents that are used
// as content panes since the Ocean LookAndFeel
// (which can have non-opaque panels) was introduced.
// Content panes must be opaque so they can draw
// themseves and their child components.
setOpaque(true);
System.out.println("Default layout manager = " +
getLayout().getClass().getName());
protected void paintComponent(Graphics g) {
// Fill background with opaque color.
super.paintComponent(g);
int w = getWidth();
int h = getHeight();
int x = (w - image.getWidth())/2;
int y = (h - image.getHeight())/2;
g.drawImage(image, x, y, this);
}
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