I have a swing applet which is actually the example on the java tutorial. I'm just adding it to a JPanel and the JFrame. For some reason the applet size is really small and you can only see a small sliver of it. I've tried to set it's size but it doesn't work. Any ideas how to size it properly?
I'm tring to run a swing applet from from withing a JFrame. It does it but the size of the applet is cutoff and you only see the top of the applet.
In my main program I'm instantiatting the applet and adding it to the frame. I've also tried creating a JPanel within the frame and the same sizing problem exists.
//Setup Swing Applet
TumbleItem tumble = new TumbleItem();
frame.getContentPane().add(tumble);
The applet I'm using is from the java tutorial : http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/index.html#TumbleItem.
I just hard coded the parameters that usually get read in from the html file. Here is the source code:
/**
* @author jag
* @author mem
* @author kwalrath
*/
/*
* TumbleItem.java requires these files:
*SwingWorker.java
*all the images in the images/tumble directory
*(or, if specified in the applet tag, another directory [dir]
*with images named T1.gif ... Tx.gif, where x is the total
*number of images [nimgs])
*the appropriate code to specify that the applet be executed,
*such as the HTML code in TumbleItem.html or TumbleItem.atag,
*or the JNLP code in TumbleItem.jnlp
*
* This example compiles and runs in 1.2, 1.3, and 1.4.
*/
public class TumbleItem extends JApplet
implements ActionListener {
int loopslot = -1; //the current frame number
String dir; //the directory relative to the codebase
//from which the images are loaded
javax.swing.Timer timer;
//the timer animating the images
int pause; //the length of the pause between revs
int offset; //how much to offset between loops
int off;//the current offset
int speed; //animation speed
int nimgs; //number of images to animate
int width; //width of the applet's content pane
Animator animator; //the applet's content pane
ImageIcon imgs[];//the images
int maxWidth;//width of widest image
boolean finishedLoading = false;
JLabel statusLabel;
static Color[] labelColor = { Color.black, Color.black,
Color.black, Color.black,
Color.black, Color.black,
Color.white, Color.white,
Color.white, Color.white };
//Called by init.
protected void loadAppletParameters() {
//Get the applet parameters.
//String at = getParameter("img");
//dir = (at != null) ? at : "images/tumble";
dir = "images/tumble";
//at = getParameter("pause");
//pause = (at != null) ? Integer.valueOf(at).intValue() : 1900;
pause = 1900;
//at = getParameter("offset");
//offset = (at != null) ? Integer.valueOf(at).intValue() : 0;
offset = 0;
//at = getParameter("speed");
//speed = (at != null) ? (1000 / Integer.valueOf(at).intValue()) : 100;
speed = 100;
//at = getParameter("nimgs");
//nimgs = (at != null) ? Integer.valueOf(at).intValue() : 16;
nimgs = 16;
//at = getParameter("maxwidth");
//maxWidth = (at != null) ? Integer.valueOf(at).intValue() : 0;
maxWidth = 0;
}
/**
* Create the GUI. For thread safety, this method should
* be invoked from the event-dispatching thread.
*/
private void createGUI() {
//Animate from right to left if offset is negative.
width = getSize().width;
if (offset < 0) {
off = width - maxWidth;
}
//Custom component to draw the current image
//at a particular offset.
animator = new Animator();
animator.setOpaque(true);
animator.setBackground(Color.white);
animator.setSize(100,100);
setContentPane(animator);
//Put a "Loading Images..." label in the middle of
//the content pane. To center the label's text in
//the applet, put it in the center part of a
//BorderLayout-controlled container, and center-align
//the label's text.
statusLabel = new JLabel("Loading Images... ",
JLabel.CENTER);
statusLabel.setForeground(labelColor[0]);
JLabel statusLabel2 = new JLabel(" ",
JLabel.CENTER);
statusLabel2.setForeground(labelColor[0]);
JLabel statusLabel3 = new JLabel(" ",
JLabel.CENTER);
statusLabel3.setForeground(labelColor[0]);
JLabel statusLabel4 = new JLabel(" ",
JLabel.CENTER);
statusLabel4.setForeground(labelColor[0]);
JLabel statusLabel5 = new JLabel(" ",
JLabel.CENTER);
statusLabel2.setForeground(labelColor[0]);
animator.setLayout(new GridLayout(5,1));
animator.add(statusLabel);
animator.add(statusLabel2);
animator.add(statusLabel3);
animator.add(statusLabel4);
animator.add(statusLabel5);
}
//Called when this applet is loaded into the browser.
public void init() {
loadAppletParameters();
//Execute a job on the event-dispatching thread:
//creating this applet's GUI.
try {
javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
createGUI();
}
});
} catch (Exception e) {
System.err.println("createGUI didn't successfully complete");
}
//Set up the timer that will perform the animation.
timer = new javax.swing.Timer(speed, this);
timer.setInitialDelay(pause);
timer.setCoalesce(false);
timer.start(); //Start the animation.
//Loading the images can take quite a while, so to
//avoid staying in init() (and thus not being able
//to show the "Loading Images..." label) we'll
//load the images in a SwingWorker thread.
imgs = new ImageIcon[nimgs];
final SwingWorker worker = new SwingWorker() {
public Object construct() {
//Images are numbered 1 to nimgs,
//but fill array from 0 to nimgs-1.
for (int i = 0; i < nimgs; i++) {
imgs = loadImage(i+1);
}
finishedLoading = true;
return imgs;
}
//Executes in the event-dispatching thread.
public void finished() {
//Remove the "Loading images" label.
animator.removeAll();
loopslot = -1;
}
};
worker.start();
}
//The component that actually presents the GUI.
public class Animator extends JPanel {
public Animator() {
super(new BorderLayout());
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (finishedLoading &&
(loopslot > -1) && (loopslot < nimgs)) {
if (imgs != null && imgs[loopslot] != null) {
imgs[loopslot].paintIcon(this, g, off, 0);
}
}
}
}
//Update the the loopslot (frame number) and the offset.
//If it's the last frame, restart the timer to get a long
//pause between loops.
public void actionPerformed(ActionEvent e) {
loopslot++;
if (!finishedLoading) {
int colorIndex = loopslot % labelColor.length;
try {
statusLabel.setForeground(labelColor[colorIndex]);
} catch (NullPointerException exc) {}
return;
}
if (loopslot >= nimgs) {
loopslot = 0;
off += offset;
if (off < 0) {
off = width - maxWidth;
} else if (off + maxWidth > width) {
off = 0;
}
}
animator.repaint();
if (loopslot == nimgs - 1) {
timer.restart();
}
}
//Called to start the applet's execution.
public void start() {
if (finishedLoading && (nimgs > 1)) {
timer.restart();
}
}
//Called to stop (temporarily or permanently) the applet's execution.
public void stop() {
timer.stop();
}
/**
* Load the image for the specified frame of animation. Since
* this runs as an applet, we use getResourceAsStream for
* efficiency and so it'll work in older versions of Java Plug-in.
*/
protected ImageIcon loadImage(int imageNum) {
String path = dir + "/T" + imageNum + ".gif";
int MAX_IMAGE_SIZE = 2400; //Change this to the size of
//your biggest image, in bytes.
int count = 0;
BufferedInputStream imgStream = new BufferedInputStream(
this.getClass().getResourceAsStream(path));
if (imgStream != null) {
byte buf[] = new byte[MAX_IMAGE_SIZE];
try {
count = imgStream.read(buf);
imgStream.close();
} catch (java.io.IOException ioe) {
System.err.println("Couldn't read stream from file: " + path);
return null;
}
if (count <= 0) {
System.err.println("Empty file: " + path);
return null;
}
return new ImageIcon(Toolkit.getDefaultToolkit().createImage(buf));
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
public String getAppletInfo() {
return "Title: TumbleItem v1.2, 23 Jul 1997\n"
+ "Author: James Gosling\n"
+ "A simple Item class to play an image loop.";
}
public String[][] getParameterInfo() {
String[][] info = {
{"img", "string", "the directory containing the images to loop"},
{"pause", "int", "pause between complete loops; default is 3900"},
{"offset", "int", "offset of each image to simulate left (-) or "
+ "right (+) motion; default is 0 (no motion)"},
{"speed", "int", "the speed at which the frames are looped; "
+ "default is 100"},
{"nimgs", "int", "the number of images to be looped; default is 16"},
{"maxwidth", "int", "the maximum width of any image in the loop; "
+ "default is 0"}
};
return info;
}
}
is there any reason you're doing it that way?
easier to change TumbleItem.java to an application, and it runs fine
this is what I did
t1-t17.gif in subfolder images/tumble
swingworker.java unchanged
TumbleItem.java:
//public class TumbleItem extends JApplet//<-changed - see next line
public class TumbleItem extends javax.swing.JFrame
implements ActionListener {
public static void main(String[] args)//<--added main() 'block'
{
TumbleItem ti = new TumbleItem();
ti.init();
ti.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
ti.setSize(200,200);
ti.setLocation(400,300);
ti.setVisible(true);
}
protected void loadAppletParameters() {//<changed the parameters to hard-coded values
//Get the applet parameters.
//String at = getParameter("img");
//dir = (at != null) ? at : "images/tumble";
dir = "images/tumble";
//at = getParameter("pause");
//pause = (at != null) ? Integer.valueOf(at).intValue() : 1900;
pause = 1900;
//at = getParameter("offset");
//offset = (at != null) ? Integer.valueOf(at).intValue() : 0;
offset = 0;
//at = getParameter("speed");
//speed = (at != null) ? (1000 / Integer.valueOf(at).intValue()) : 100;
speed = 100;
//at = getParameter("nimgs");
//nimgs = (at != null) ? Integer.valueOf(at).intValue() : 16;
nimgs = 16;
//at = getParameter("maxwidth");
//maxWidth = (at != null) ? Integer.valueOf(at).intValue() : 0;
maxWidth = 0;
}
Message was edited by:
Michael_Dunn
Note: notice the difference in readability when code tags are used