How to resize painted components
Hi All,
I am working on a simple project called "WhiteBoard" which is veryu similar to MS-Paint. Could anyone please tell me how to resize the components which I have drawn on the panel. Thanks in advance.
Regards,
Shankar.
Cast the Graphics instance passed to the paintComponent() method of your board to a Graphics2D.
Then use the scale(double sx, double sy) method of the Graphics2D instance to zoom
your board in or out.
IMPORTANT NOTE: If you use a mouse listener on the board, you'll have to convert the mouse
coordinates according to the zoom factor.
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How to pass/share components between different JPanels/Container
Dear Friends,
I know here a lot Java Guru, I met a problem below.
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[1]. main Program:
package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
private JFrame frame;
* Launch the application
* @param args
public static void main(String args[]) {
try {
ListPanelMain window = new ListPanelMain();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
* Create the application
public ListPanelMain() {
initialize();
* Initialize the contents of the frame
private void initialize() {
frame = new JFrame("FileTreePanelMain");
frame.setBounds(100, 100, 900, 675);
// FieTreePanelComm ftreecomm = new FieTreePanelComm();
ListPanel ftree = new ListPanel("C:\\");
// ListAllFile ftree = new ListAllFile("C:\\");
// FileTreePanelText fileTreePanelText = new FileTreePanelText(ftreecomm);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
panel.setLayout(new GridLayout(0, 2));
frame.getContentPane().add(panel, BorderLayout.CENTER);
// final JSplitPane splitPane = new JSplitPane();
// frame.getContentPane().add(splitPane, BorderLayout.CENTER);
// splitPane.setLeftComponent(ftree);
panel.add(ftree);
final ListRightPanel listRightPanel = new ListRightPanel(ftree);
//splitPane.setRightComponent(listRightPanel);
panel.add(listRightPanel);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
[2]. Program 2:
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
ltextArea.setText(ta);
str = ta;
return str;
public ListPanel(String directory) {
//super("JTree FileSystem Viewer");
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
final ListRightPanel lrp = new ListRightPanel(this);
lrp.textArea.setText(getFileDetails(file));
setlTextArea(getFileDetails(file));
System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
final JSplitPane splitPane = new JSplitPane();
panel.add(splitPane, BorderLayout.CENTER);
final JPanel panel_1 = new JPanel();
splitPane.setLeftComponent(panel_1);
panel_1.add(new JScrollPane(fileTree));
final JPanel panel_2 = new JPanel();
splitPane.setRightComponent(panel_2);
panel_2.add(new JScrollPane(fileDetailsTextArea));
setVisible(true);
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
if (file.listFiles()!=null){
for (int i=0; i< file.listFiles().length; i++){
buffer.append(((file.listFiles())) + "\n");
System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3]. Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
protected JTextArea textArea;
// protected ListAllFile laf;
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
str = ta;
return str;
* Create the panel
public ListRightPanel(ListPanel laff) {
super();
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
textArea = new JTextArea();
final String st = laff.getlTextArea();
System.out.println("####################################");
System.out.println("st=" + st);
laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
//laff.textArea.setText(getFileDetails(file));
textArea.setText(getlTextArea());
System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
System.out.println("st=" + st);
panel.add(textArea, BorderLayout.CENTER);
public void valueChanged(TreeSelectionEvent e){};
It is runnable program, just compile and run it in Console is ok,
Regards
SunnyThnaks, code post again, see
[1]. package swing.com.test.test;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import java.io.Serializable;
import swing.com.test.test.ListPanel;
import java.awt.GridLayout;
public class ListPanelMain implements java.io.Serializable{
private JFrame frame;
* Launch the application
* @param args
public static void main(String args[]) {
try {
ListPanelMain window = new ListPanelMain();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
* Create the application
public ListPanelMain() {
initialize();
* Initialize the contents of the frame
private void initialize() {
frame = new JFrame("FileTreePanelMain");
frame.setBounds(100, 100, 900, 675);
// FieTreePanelComm ftreecomm = new FieTreePanelComm();
ListPanel ftree = new ListPanel("C:\\");
// ListAllFile ftree = new ListAllFile("C:\\");
// FileTreePanelText fileTreePanelText = new FileTreePanelText(ftreecomm);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
panel.setLayout(new GridLayout(0, 2));
frame.getContentPane().add(panel, BorderLayout.CENTER);
// final JSplitPane splitPane = new JSplitPane();
// frame.getContentPane().add(splitPane, BorderLayout.CENTER);
// splitPane.setLeftComponent(ftree);
panel.add(ftree);
final ListRightPanel listRightPanel = new ListRightPanel(ftree);
//splitPane.setRightComponent(listRightPanel);
panel.add(listRightPanel);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
}[2] Program 2
package swing.com.test.test;
//File System Tree
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListPanel extends JPanel implements Serializable{
protected JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea ltextArea = new JTextArea();
protected JTextArea fileDetailsTextArea = new JTextArea();
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
ltextArea.setText(ta);
str = ta;
return str;
public ListPanel(String directory) {
//super("JTree FileSystem Viewer");
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
System.out.println("1. What we save is: getlTextArea() =" + getlTextArea() );
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
final ListRightPanel lrp = new ListRightPanel(this);
lrp.textArea.setText(getFileDetails(file));
setlTextArea(getFileDetails(file));
System.out.println("2. What we save is: getlTextArea() =" + getlTextArea() );
final JSplitPane splitPane = new JSplitPane();
panel.add(splitPane, BorderLayout.CENTER);
final JPanel panel_1 = new JPanel();
splitPane.setLeftComponent(panel_1);
panel_1.add(new JScrollPane(fileTree));
final JPanel panel_2 = new JPanel();
splitPane.setRightComponent(panel_2);
panel_2.add(new JScrollPane(fileDetailsTextArea));
setVisible(true);
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
if (file.listFiles()!=null){
for (int i=0; i< file.listFiles().length; i++){
buffer.append(((file.listFiles())) + "\n");
System.out.println("List all files");
return buffer.toString();
public static void main(String args[]) {
new ListPanel("c:\\");
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
public Object getRoot() {
return root;
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
return 0;
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
return -1;
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
public String toString() {
return getName();
[3] Program 3:
package swing.com.test.test;
import java.awt.BorderLayout;
import java.io.File;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import java.io.Serializable;
public class ListRightPanel extends JPanel implements TreeSelectionListener, Serializable{
protected JTextArea textArea;
// protected ListAllFile laf;
private String str = "";
public String getlTextArea() {
//textArea.getText();
return str;
public String setlTextArea(String ta) {
str = ta;
return str;
* Create the panel
public ListRightPanel(ListPanel laff) {
super();
setLayout(new BorderLayout());
final JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
add(panel, BorderLayout.CENTER);
textArea = new JTextArea();
final String st = laff.getlTextArea();
System.out.println("####################################");
System.out.println("st=" + st);
laff.fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
//laff.textArea.setText(getFileDetails(file));
textArea.setText(getlTextArea());
System.out.println("ListRightPanel Was Invoked from ListPanel!!getlTextArea() =" + getlTextArea() );
System.out.println("st=" + st);
panel.add(textArea, BorderLayout.CENTER);
public void valueChanged(TreeSelectionEvent e){};
}You can try this one, thanks again
sunny -
How to resize a photo from CameraUI?
Hi there,
i really need som help here. I cant seem understand how to resize an still image taken with the camera. Here are the code so far(also with the upload part). I just need a thumbnail to be uploaded to the server, not the HQ-image. Any ideas?
Simple AIR for iOS Package for selecting a cameraroll photo or taking a photo and processing it.
Copyright 2012 FIZIX Digital Agency
http://www.fizixstudios.com
For more information see the tutorial at:
http://www.fizixstudios.com/labs/do/view/id/air-ios-camera-and-uploading-photos
Notes:
This is a barebones script and is as generic as possible. The upload process is very basic,
the tutorial linked above gives information on how to post the image along with data to
your PHP script.
The PHP script will collect as $_FILES['Filedata'];
import flash.display.MovieClip;
import flash.events.MouseEvent;
import flash.events.TouchEvent;
import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;
import flash.media.Camera;
import flash.media.CameraUI;
import flash.media.CameraRoll;
import flash.media.MediaPromise;
import flash.media.MediaType;
import flash.events.MediaEvent;
import flash.events.Event;
import flash.events.ErrorEvent;
import flash.utils.IDataInput;
import flash.events.IEventDispatcher;
import flash.events.IOErrorEvent;
import flash.utils.ByteArray;
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
import flash.errors.EOFError;
import flash.net.URLRequest;
import flash.net.URLVariables;
import flash.net.URLRequestMethod;
// Define properties
var cameraRoll:CameraRoll = new CameraRoll(); // For Camera Roll
var cameraUI:CameraUI = new CameraUI(); // For Taking a Photo
var dataSource:IDataInput; // Data Source
var tempDir; // Our temporary directory
CameraTest() ;
function CameraTest()
Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
// Start the home screen
startHomeScreen();
// =================================================================================
// startHomeScreen
// =================================================================================
function startHomeScreen()
trace("Main Screen Initialized");
// Add main screen event listeners
if(Multitouch.supportsGestureEvents)
mainScreen.startCamera.addEventListener(TouchEvent.TOUCH_TAP, initCamera);
mainScreen.startCameraRoll.addEventListener(TouchEvent.TOUCH_TAP, initCameraRoll);
else
mainScreen.startCamera.addEventListener(MouseEvent.CLICK, initCamera);
mainScreen.startCameraRoll.addEventListener(MouseEvent.CLICK, initCameraRoll);
// =================================================================================
// initCamera
// =================================================================================
function initCamera(evt:Event):void
trace("Starting Camera");
if( CameraUI.isSupported )
cameraUI.addEventListener(MediaEvent.COMPLETE, imageSelected);
cameraUI.addEventListener(Event.CANCEL, browseCancelled);
cameraUI.addEventListener(ErrorEvent.ERROR, mediaError);
cameraUI.launch(MediaType.IMAGE);
else
mainScreen.feedbackText.text = "This device does not support Camera functions.";
// =================================================================================
// initCameraRoll
// =================================================================================
function initCameraRoll(evt:Event):void
trace("Opening Camera Roll");
if(CameraRoll.supportsBrowseForImage)
mainScreen.feedbackText.text = "Opening Camera Roll.";
// Add event listeners for camera roll events
cameraRoll.addEventListener(MediaEvent.SELECT, imageSelected);
cameraRoll.addEventListener(Event.CANCEL, browseCancelled);
cameraRoll.addEventListener(ErrorEvent.ERROR, mediaError);
// Open up the camera roll
cameraRoll.browseForImage();
else
mainScreen.feedbackText.text = "This device does not support CameraRoll functions.";
// =================================================================================
// imageSelected
// =================================================================================
function imageSelected(evt:MediaEvent):void
mainScreen.feedbackText.text = "Image Selected";
// Create a new imagePromise
var imagePromise:MediaPromise = evt.data;
// Open our data source
dataSource = imagePromise.open();
if(imagePromise.isAsync )
mainScreen.feedbackText.text += "Asynchronous Mode Media Promise.";
var eventSource:IEventDispatcher = dataSource as IEventDispatcher;
eventSource.addEventListener( Event.COMPLETE, onMediaLoaded );
else
mainScreen.feedbackText.text += "Synchronous Mode Media Promise.";
readMediaData();
// =================================================================================
// browseCancelled
// =================================================================================
function browseCancelled(event:Event):void
mainScreen.feedbackText.text = "Browse CameraRoll Cancelled";
// =================================================================================
// mediaError
// =================================================================================
function mediaError(event:Event):void
mainScreen.feedbackText.text = "There was an error";
// =================================================================================
// onMediaLoaded
// =================================================================================
function onMediaLoaded( event:Event ):void
mainScreen.feedbackText.text += "Image Loaded.";
readMediaData();
// =================================================================================
// readMediaData
// =================================================================================
function readMediaData():void
mainScreen.feedbackText.text += "Reading Image Data.";
var imageBytes:ByteArray = new ByteArray();
dataSource.readBytes( imageBytes );
tempDir = File.createTempDirectory();
// Set the userURL
var serverURL:String = "http://www.hidden_in_this_example.com/upload.php";
// Get the date and create an image name
var now:Date = new Date();
var filename:String = "IMG" + now.fullYear + now.month + now.day + now.hours + now.minutes + now.seconds;
// Create the temp file
var temp:File = tempDir.resolvePath(filename);
// Create a new FileStream
var stream:FileStream = new FileStream();
stream.open(temp, FileMode.WRITE);
stream.writeBytes(imageBytes);
stream.close();
// Add event listeners for progress
temp.addEventListener(Event.COMPLETE, uploadComplete);
temp.addEventListener(IOErrorEvent.IO_ERROR, ioError);
// Try to upload the file
try
mainScreen.feedbackText.text += "Uploading File";
//temp.upload(new URLRequest(serverURL), "Filedata");
// We need to use URLVariables
var params:URLVariables = new URLVariables();
// Set the parameters that we will be posting alongside the image
params.userid = "1234567";
// Create a new URLRequest
var request:URLRequest = new URLRequest(serverURL);
// Set the request method to POST (as opposed to GET)
request.method = URLRequestMethod.POST;
// Put our parameters into request.data
request.data = params;
// Perform the upload
temp.upload(request, "Filedata");
catch( e:Error )
trace(e);
mainScreen.feedbackText.text += "Error Uploading File: " + e;
removeTempDir();
// =================================================================================
// removeTempDir
// =================================================================================
function removeTempDir():void
tempDir.deleteDirectory(true);
tempDir = null;
// ==================================================================================
// uploadComplete()
// ==================================================================================
function uploadComplete(event:Event):void
mainScreen.feedbackText.text += "Upload Complete";
// ==================================================================================
// ioError()
// ==================================================================================
function ioError(event:Event):void
mainScreen.feedbackText.text += "Unable to process photo";1. Create a BitmapData of the correct size of the full image
2. Use BitmapData.setPixels to create pixel data from your byteArray
3. Make a new Bitmap, Bitmap.bitmapData = BitmapData
4. Create a matrix with the correct scaling factors for your thumbnail
5. Create a new BitmapData the size of your thumb
6. Use BitmapData.draw to draw your image data from the Bitmap to the new BitmapData with the scaling matrix
7. Use BitmapData.getPixels to create a bytearray from your thumb BitmapData
8. save it
You'll have to look up the AS3 reference to see how all these methods work. -
As a JSF Developer, I want to understand technically how the JSF View Components are rendered as html and how there events are binded to Server.I want to know how flows goes to the server and server understands the method which is to be called of managed bean. I know it is with annotation @ManagedBean and method name, but how Call is binded with annotation @ManagedBean.
In short, i want to know the internal implementation of JSF Framework.As a JSF Developer, I want to understand technically how the JSF View Components are rendered as html and how there events are binded to Server.I want to know how flows goes to the server and server understands the method which is to be called of managed bean. I know it is with annotation @ManagedBean and method name, but how Call is binded with annotation @ManagedBean.
In short, i want to know the internal implementation of JSF Framework. -
How to change the components in a visible JPanel?
How to change the components in a visible JPanel?
Is there any way to change the components in a JPanel while it is already visible in a JFrame? I tried the na�ve approach of removing the components and adding new ones, but the effect is not the expected.
For now I'm opening new frames with newly created panels.After adding/removing components to/from a panel try:
panel.revalidate();
panel.repaint() // sometimes this is also needed, I'm
not sure whyI'm not certain, but I think that panel.revalidate() implicitly calls repaint() only if something actually changed in the layout. If nothing changed, it sees no reason to repaint; hence, if something changed in appearance but not in layout, you have to repaint it yourself.
Or something like that. I'm no expert. ;) -
How to resize my monitor resolution in OS X 10.5.8
Hello I have a question I am new to mac and I was trying to resize my desktop resolution. I'm using a 720i TV utilizing the HDMI and using the convertor to make it DVI and for some reason when I use the 720 resolution its all off center and it won't let me resize it like it does in Windows but it works when i have it at 1280 x 960 problem is I don't want that resolution it doesn't look as good on my TV. I have tried everything and can't find any software that will allow me to do this. And I use the same monitor for my Windows machine and it works perfect PLEASE HELP
Yeah..... I know that I want to know how to resize a resolution the 1280 x 720 doesn't show up right it's making everything go off the sides so I can't see everything on my desktop in windows my nvidia control panel would allow me to resize my monitor to fit any resolution i want to know how to do that on a mac
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How to resize all pages -Acrobat 9 Pro Extended ? ?
I came across a pre-existing pdf file of an old book of genealogy. According to the front pages, it was 'Digitized by Microsoft', so I know nothing on how it was generated. Total pages are in excess of 1,100.
In viewing the pages, they are reflected as 2 pages to a view; not the book opened with the spine in the middle, but images side by side ... in numerical order ... and they appear as a normal sized 2 page for that view. When I print out a page, by number, it also prints out in a normal size on an 8x11 inch sheet of paper.
However, rather than print page by page on individual sheets of paper, I want to print out multiple pages, 2 to a sheet of paper. In doing this, the images of the pages come up as 3x5 inch; thus not readable if printed without the usage of magnifier.
Not that familiar with the program, but tried to do a resize process by setting some adjustments and then to a new pdf file. It did not change that much ... and increased the file size dramatically.
I am a novice to these processes. Can someone advise how to resize the whole file, with images of pages side by side, so that when multiple print is used for 2 pages the size comes up closer to something like 5x7 inch each?
ThanksLet me try it this way.....
1. The pdf file, when initially opened up, in the opening view shows 2 simotaneous pages side by side ... with hardly a divider between them. This at this point has nothing to do with the print mode.
2. The book in question was 'Digitized by Microsoft' ... don't know if that makes any difference, but thought it would help to under stand that it was not created by the normal Adobe Acrobat method.
3. Now, when I go to the Print mode, from where I just viewed the 2-side-by-side pages, the initial view there, for 'page', is just 1 page ... not the 2 page view I just came from ... and it will print out this view in a full sheet version.
4. But, not wanting to print out 1130 pages, want to print multi-page as allowed under Acrobat options.
5. So choose multi-page and 2 pages and "Print to printable area"..
6. When this option appears in the print viewing window, the 'images' (presuming that to be the correct reference) are small, over the normal (roughly) 5 x 7 inch (each) for a 2-page print option.
7. With the 2-page print option, the images are only 3.5 x 5.25 inches ... rather than something like 5 x 7 inch ... which is difficult to read without a magnifier. [Note: This 3.5 x 5.25 is as indicated in Properties that the original 'Digitizing' did.
8. So, in essence, how can one change the default individual image size from 3.5 x 5.25 inch size, to something closer to 5 x 7 inch size ... so that each image fills in more of it's half of the 8.5 x 11 inch page being printed ... rather than the small size reflected in the attached jpg ?
I've attached a jpg of the print screen, and one of the 2 page side-by-side 'default' view in Acrobat.
Thanks -
How to transfer Painter 12 with my custom brushes from old iMac to a new iMac both running Mavericks
Hi,
I just purchased a new iMac. Have Painter 12 on my older iMac and want to be able to transfer Painter 12, with my custom brushes to my new iMac. Tried Airdrop but got a message that it was damaged and that I should trash it. Does any know how to get Painter 12 with all my custom brushes to my new machine? Both are running Mavericks.
Thank you,
Jimetresoft,
Thank you for your response. I did try to use Migration Assistant and I got as far as the two machines trying to communicate with each other. So I guess the answer to your question would be I tried, I failed and it worked until a certain point. I understand that there are other ways to connect the machines, I would have to see if I have the proper cables to do so. Airdrop did get data to my new machine and that tells me that they do see each other on the network. I do not know why they did not see each other via Migration Assistant. I assume that I could go to Corel's site and download Painter 12 to my new machine, ( my new machine does not have a disk drive ), but I will not have my custom brushes etc. and would have to totally make them up in the fresh install version and I am trying to avoid that.
You are probably correct in saying that Painter 12 probably needs a full reinstallation to work properly. Am I to assume that Migration Assistant will do a full reinstallation, including my custom brushes? I guess I am a little confused here.
Jim -
Confused about how to use paint()
Hi, I have been working really hard to try to get the following program to work but I am really confused on how to use paint(). I do not have anyone to ask so I thought this forum could help. Anyways, here is my problem...
I am trying to recursively figure out the Sierpinski fractal. I cannot figure out if my math works or not because I do not know how to call the paint() recursively to draw my triangles.
Please have a look at the following code. Thank you!
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
public class DrawTriangle extends Frame {
Point a = new Point(20,480),
b = new Point(350,40),
c = new Point(680,480),
halfB,
halfC,
halfB2,
halfC2,
halfC3;
int width;
public DrawTriangle() {
super("Sierpinski Fractal");
addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent we ) {
dispose();
System.exit( 0 );
setBackground( Color.white );
setSize(700, 500);
setVisible(true);
public void paint(Graphics g, Point a, Point b, Point c) {
width = c.x - a.x;
if (width < 6){return;}
g.setColor( Color.GREEN );
g.drawPolygon( new int[] { a.x, b.x, c.x }, new int[] { a.y, b.y, c.y }, 3 );
halfC.x = c.x/2;
halfC.y = c.y;
halfB.y = b.y/2;
halfB.x = b.x;
halfB2.y = halfB.y + a.y;
halfB2.x = a.x;
halfC2.x = halfC.x + a.x;
halfC2.y = a.y;
halfC3.x = halfC.x/2 + a.x;
halfC3.y = halfB2.y;
paint(g, a, halfC, halfB);
paint(g, halfC3, halfC, halfB);
paint(g, halfC2, halfC, halfB);
public static void main(String[] args) {
new DrawTriangle();thanks jsalonen, your tip let me start working on the math to correct it.
I have a new problem now. My math is correct but I am having problems with the recursion. I can draw only the top , left , or right triangles. I cannot get them all to work together. See code and comments below.
Any ideas why I cant call all three of the paint()s toegther and have them work?
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
public class DrawTriangle extends Frame {
Point a = new Point(20,480),
b = new Point(350,40),
c = new Point(680,480),
halfA,
halfB,
halfC;
int width;
public DrawTriangle() {
super("Sierpinski Fractal");
addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent we ) {
dispose();
System.exit( 0 );
setBackground( Color.white );
setSize(700, 500);
setVisible(true);
public void paint(Graphics g)
paint(g, a, b, c);
public void paint(Graphics g, Point a, Point b, Point c) {
width = c.x - a.x;
if (width < 6){return;}
halfA = new Point((a.x+b.x)/2, (a.y+b.y)/2);
halfB = new Point((a.x+c.x)/2, (a.y+c.y)/2);
halfC = new Point((b.x+c.x)/2, (b.y+c.y)/2);
g.setColor( Color.GREEN ); //draw left triangle in green
g.drawPolygon( new int[] { a.x, halfA.x, halfB.x }, new int[] { a.y, halfA.y, halfB.y }, 3 );
g.setColor( Color.RED ); //draw top triangle in red
g.drawPolygon( new int[] { b.x, halfA.x, halfC.x }, new int[] { b.y, halfA.y, halfC.y }, 3 );
g.setColor( Color.BLUE ); //draw right triangle in blue
g.drawPolygon( new int[] { c.x, halfB.x, halfC.x }, new int[] { c.y, halfB.y, halfC.y }, 3 );
/*If you were to comment our two of these paint() calls the one will work correctly alone.
*But my problem is that they do not work together! */
//g, left point, top point, right point
paint(g, halfA, b, halfC); //top triangle
paint(g, halfC, halfB, c); //right triangle
paint(g, a, halfA, halfB); //left triangle
public static void main(String[] args) {
new DrawTriangle();
}
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