Help with combobox event handling
hey techies
does knw any1 tutorial or where any URL which helps me adding event handling to combobox
iam new at event handling
i tried
jc1.addItemListener(this);
public void itemStateChanged(ItemEvent event)
if(event.getSource()==jc1)
System.out.println("hello");
}is this way correct to specify event handling in combobox
i tired this iam getting NPE like this
Exception in thread "main" java.lang.NullPointerException
at FinalMobile.<init>(FinalMobile.java:213)
at FinalMobile.main(FinalMobile.java:740)
plz jst let me knw and dnt tell me to refer swing tutorial i have been reffering it
any help is appreciated
does knw any1 tutorial or where any URL which helps me adding event handling to comboboxExcuse me, I've told you at least 4 times now to download and read the Swing tutorial which has all this information with working examples. I even provided you with the download link.
How do you have the nerve to say you can't find any tutorial?
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{"titleTxt", "Convertisseur de poids de nourriture"},
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}Edited by: JessePhoenix on Nov 2, 2008 8:30 PMcatman2u wrote:
does anyone from Lenovo actually read this forum?
From the Communiy Rules in the Welcome section....
Objectives of Lenovo Discussion Forums
These communities have been created to provide a high quality atmosphere in which users of Lenovo products and services may share experiences and expertise. While members from Lenovo may participate at intervals to engage in the discussions and offer advice and suggestions, this forum is not designed as a dedicated and staffed support channel. This is an informal and public forum, and Lenovo does not guarantee the accuracy of information and advice posted here -- see important Warranty information below.
No amount of ranting is going to get you anything more than you will achieve with a clear exposition of your issue... so you might want to try doing that instead of ranting and assuming that everyone already knows what you know etc etc.
Cheers,
Bill
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Message was edited by:
pthorson -
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package
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BigIcon.as
package
import flash.display.MovieClip;
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this.y += 10;Ned Murphy wrote:
You should be getting an error for the Main.as class due to missing a line to import the Event class...
import flash.events.Event;
My apologies, I should attempt to compile my example code before I ask for help...
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package
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iconImage_str = iconImage_arg;
iconRow_int = iconRow_arg;
iconColumn_int = iconColumn_arg;
this.addEventListener(Event.ADDED_TO_STAGE, Setup);
function Setup(e:Event)
this.y = iconRow_int;
this.x = iconColumn_int;
var ClassReference:Class = getDefinitionByName(iconImage_str) as Class;
var thisIcon_mc:MovieClip = new ClassReference;
this.addChild(thisIcon_mc);
addEventListener("twitchupEvent", twitchUp);
trace("addEventListener");
function twitchUp(e:Event)
this.y += 10;
trace("EventTriggered");
Output:
[SWF] Untitled-1.swf - 40457 bytes after decompression
addEventListener
addEventListener
addEventListener
addEventListener
addEventListener
addEventListener
dispatchEvent
[UnloadSWF] Untitled-1.swf
Test Movie terminated. -
Help with the event log in the type B hub
I have probs with broadband slowing down and also with link going down a number of times again (it recovers quickly)
I just wanted to confirm that the message in trhe event log in the type B hub:-
(134558.700000) RTNL: Received ERROR reply 'No such process' for message type 0x19
was the link dropping.
Can anybody confirm this and does anyone know if/where the messages are documented?
Thanks in advance
Banzdoes nobody have any comments on this
Mods - please help
banz
ps this is my last bump - I will give up after this -
Hi,
I have a problem: I want to place a NSButton with type of "Recessed Button" on NSView and part of button should be on view and another part should be outside of this view
That's ok, but when cursor of mouse move inside button and outside view, button receive event about this.
What need to do for this event do not send to button when cursor move outside my view ?
ThanksI think that if replace options in NSTrackingArea for NSButton it will be help me
In Debugger I saw that default options is 4225 - I think that it's NSTrackingMouseEnteredAndExited|NSTrackingActiveAlways|NSTrackingAssumeInside
I want replace it to NSTrackingMouseEnteredAndExited|NSTrackingActiveAlways|NSTrackingInVisibleRect
But if I do it in awakeFromNib function and add breakpoint in drawRect: -- it have first value. Somewhere value overwrite before drawRect:
Code:
//MyButton.mm
- (void)awakeFromNib
NSArray *a = [self trackingAreas];
NSTrackingArea * t = [[NSTrackingArea alloc] initWithRect:(NSRect){0, 0, 100, 50}
options:NSTrackingMouseEnteredAndExited|NSTrackingActiveAlways|NSTrackingInVisi bleRect
owner:self
userInfo:nil];
[self removeTrackingArea:[a objectAtIndex:0]];
[self addTrackingArea:t];
[t release];
- (void)drawRect:(NSRect)aRect
NSArray *a = [self trackingAreas];
NSTrackingArea *t1 = [a objectAtIndex:0]; //always first value !!!
[super drawRect: aRect];
Any idea how to do that ?
Message was edited by: pavelmagur -
hi everyone i need some help. i have to write an java application thatcreates a panel with three labels and three key events to call upon different methods. i try to creat a JFrame but have problems. anyone can help?
Thankspublic class MyClass extends JFrame{
public MyClass(){
getContentPane().add( new Label("One") );
getContentPane().add( new Label("Two") );
getContentPane().add( new Label("Three") );
setSize(400,400);
setVisible(true);
public static void main(String[] args){
MyClass myclass = new MyClass();
public static void main is the starting point of a program.
When the frame is created using
MyClass myclass = new MyClass();
The control goes to the constructor where you can add three labels.
You can add three methods to MyClass and implement KeyListener in MyClass to build upon it. -
SystemManagerHandler bug with otherSystemManager event handling?
I've run across an issue with PopUpManager & Alerts generating stack overflow errors.
When I have multiple windows in AIR open with Alerts active, and I click on any window with out an alert, I get the stack overflow error.
(Note: You have to open the multiple windows first .. then trigger the alerts. If you open a window 1 at a time, and trigger the alerts .. you get no stack overflow)
Anyways .. I traced this down inside of systemManagerHandler to the function windowedManagerHandler
In that function is a piece of code for handling events triggered from other system managers:
private function systemManagerHandler(event:Event):void
if (event["name"] == "sameSandbox")
event["value"] = currentSandboxEvent == event["value"];
return;
Notice in this code the last == ... that seems to be a coding error. If i change the line to event["value"] = currentSandboxEvent = event["value"]; my stack overflow errors go away.
Can anyone else confirm that this is indeed a coding error in systemManagerHandler ?Hi Luk,
You don't mention which version or patch level of SBO your client is using. Does this happen for you on different patches?
I did a quick test on one of my test systems (SBO 2007A SP1 Patch 9 HF1) and I only get one resize event firing. It's the same whether I run with no addons or with an addon that I wrote that adds controls to the sales order form and which moves those items when the form is resized.
Kind Regards,
Owen -
Help with Comboboxes inside a repeater
Hi, I have a problem that I really need some help, if anyone knows how to do it.
I have to make in flex a dynamic form that has X questions and each question can be answered 3 times by sellecting Y options in a combobox. As you can Imagine the number of questions and answers can change.
Something like this:
QUESTION FIRST ANSWER 2nd ANSWER 3rd ANSWER
1- Which option do you like? Combobox: A Combobox: C CB: A
2- Second Question? Combobox: B Combobox: C CB: D
3- Third Question? Combobox: A Combobox: Blank CB: B
(CB: means Combobox - I just made it shorter so it could fit the window)
I managed to correctly using a repeater show all the questions and each combobox has all the right options inside. All I want now is to get the data from those comboboxes.
This is a Simplified code (I removed all the non-essencial stuff) so you can get an idea:
<mx:Repeater id="rp">
<mx:VBox label="{rp.currentItem.nome}"
width="100%">
<mx:Repeater id="qt"
dataProvider="{rp.currentItem.tbdavaliacao_pergunta}">
<mx:HBox width="100%"
verticalAlign="middle"
horizontalAlign="center">
<!-- This is the question text -->
<mx:Text text="{String(qt.currentItem.nome)}"
textAlign="center"/>
<!-- Next, are the 3 comboboxes that are repeated X times -->
<mx:ComboBox dataProvider="{grau}"
id="auto"
textAlign="center">
</mx:ComboBox>
<mx:ComboBox dataProvider="{grau}"
id="superior"
textAlign="center">
</mx:ComboBox>
<mx:ComboBox dataProvider="{grau}"
id="resultado"
textAlign="center">
</mx:ComboBox>
</mx:HBox>
</mx:Repeater>
</mx:VBox>
</mx:Repeater>
Anyone has an idea of how can I get all the answers from all my dynamic comboboxes?
The perfect AND ideal solution would be having X Dynamic objects with the question id + the combobox id storing the answer sellected.
So I would know that the question 32 has the answers A, B and A for an example.
qt.currentitem.id + combobox.id = selectedLabel
(question ID) + (combobox id) = (selectedLabel)
32auto = 'A'
32superior = 'B'
32resultado = 'A'
Or just one arraycollection with all the answers...
At this point, I would accept any answer or idea or sollution...
Thanks a lot!!I've looked at the HR schema to provide an example
From the EMPLOYEES table I would like to return the EMPLOYEE_IDs of the employees with the highest SALARY per JOB_ID. When considering the employees that have the same JOB_ID, if any of the employees have a MANAGER_ID of x then no employee is returned for that group of employees with the same JOB_ID. x will be passed in as a parameter to my procedure.
Example
MANAGER_ID of 99 passed in
All of the EMPLOYEE_IDs with the max SALARY per JOB_ID returned - no one has a manager with MANAGER_ID of 99
MANAGER_ID of 101 passed in
101 returned - Neena has the max salary of all the AD_VPs and neither of the AD_VPs has a MANAGER_ID of 101 (ok I know this isn't true about the salary!)
102 returned - Alexander has the max salary of all IT_PROGs and none of them has MANAGER_ID of 101
(108 not returned as Nancy has MANAGER_ID of 101)
109 returned - Daniel has the max salary of all the FI_ACCOUNTs and none of them has MANAGER_ID of 101
etc... for all JOB_IDs
MANAGER_ID of 102 passed in
101 returned - Neena has the max salary of all the AD_VPs and neither of the AD_VPs has a MANAGER_ID of 102 (ok I know this isn't true about the salary!)
(no IT_PROGs returned as Alexander has MANAGER_ID of 102)
108 returned - Nancy has max SALARY and not a MANAGER_ID of 102
109 returned - Daniel has the max salary of all the FI_ACCOUNTs and none of them has MANAGER_ID of 102
etc... for all JOB_IDs
MANAGER_ID of 103 passed in
101 returned - Neena has the max salary of all the AD_VPs and neither of the AD_VPs has a MANAGER_ID of 103 (ok I know this isn't true about the salary!)
(no IT_PROGs returned as several have MANAGER_ID of 103)
108 returned - Nancy has max SALARY and not a MANAGER_ID of 103
109 returned - Daniel has the max salary of all the FI_ACCOUNTs and none of them has MANAGER_ID of 103
etc... for all JOB_IDs
Hope this helps to explain things, and thanks to anyone that can help
Rob -
if let say my comboBox got "A","B","C"...
then i got name field and ID field.
how can i make it where the comboBox "C" is choosen and it will record down?so that when i open that particular record back..it show "C"
i can save the name and ID but do not know how to save the content of ComboBOx after choosen..please guide me..thank youCheck out my RememberData class. I think it's along the lines of what you're looking for
You are free to use and modify this code, but please do not change the package or take credit for it as your own code, except where you have made changes. Also note that I never actually implemented functionality to save to a zip archive.
To be totally honest, I built this class and tested it a couple times, but I think it could well do with more testing. If you decide to use it, could you please email me feedback at some point at [email protected]? Thanks.
=================================================
RememberData.java
* Created on Jul 3, 2005 by @author Tom Jacobs
package tjacobs.io;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import javax.swing.DefaultListModel;
import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.ListModel;
import javax.swing.MutableComboBoxModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import tjacobs.IOUtils;
import tjacobs.zip.ZipUpdate;
public class RememberData implements Runnable {
private static HashMap<ListModel, JComboBox[]> mComboDependencies = new HashMap<ListModel, JComboBox[]>();
private static HashMap<ListModel, CommonListDataListener> mModelListeners = new HashMap<ListModel, CommonListDataListener>();
private static HashMap<ListModel, File> mFileMap = new HashMap<ListModel, File>();
public static final String FOOTER = "\n\n\n";
private boolean sWritingToFile = false;
private static ArrayList<CommonListDataListener> sQueue;
private boolean sRunning = true;
private static RememberData sSingleton;
private static boolean useZip = true;
private RememberData() {
super();
public void run() {
while (sRunning) {
if (sQueue.size() != 0) {
CommonListDataListener listener = sQueue.remove(0);
listener.saveChanges();
else {
synchronized (RememberData.class) {
try {
RememberData.class.wait();
catch (InterruptedException ex) {}
public void addDependencies(MutableComboBoxModel model, JComboBox[] combos) {
if (sSingleton == null) {
//don't know how this could happen, but it's good just to be paranoid
throw new Error("RememberData: Singleton is null");
mComboDependencies.put(model, combos);
if (combos != null) {
ModelListener l = new ModelListener(model);
for (int i = 0; i < combos.length; i++) {
combos.addActionListener(l);
private static class ModelListener implements ActionListener {
private MutableComboBoxModel mModel;
public ModelListener(MutableComboBoxModel model) {
mModel = model;
public void actionPerformed(ActionEvent ae) {
//disable Listener
CommonListDataListener l = mModelListeners.get(mModel);
if (l == null) {
throw new RuntimeException("model must have listener");
JComboBox[] combos = mComboDependencies.get(mModel);
File f = mFileMap.get(mModel);
mModel.removeListDataListener(l);
loadData(mModel, f, combos);
mModel.addListDataListener(l);
//enable Listener
public static void RememberData(MutableComboBoxModel model, File f) {
RememberData(model, f, null);
public static void RememberData(MutableComboBoxModel model, File base, JComboBox[] dependencies) {
mFileMap.put(model, base);
loadData(model, base, dependencies);
CommonListDataListener l = new CommonListDataListener(model);
model.addListDataListener(l);
mModelListeners.put(model, l);
if (sSingleton == null) {
sSingleton = new RememberData();
sSingleton.addDependencies(model, dependencies);
private static File getRelativeFile(File f, JComboBox[] dependencies) {
if (dependencies != null) {
String path = f.getAbsolutePath();
int idx = path.lastIndexOf(".");
String ending = idx == -1 ? "" : path.substring(idx + 1);
path = idx == -1 ? path : path.substring(0, idx);
StringBuffer sb = new StringBuffer(path);
for (int i = 0; i < dependencies.length; i++) {
sb.append("-" + dependencies[i].getSelectedItem().toString());
f = new File(sb.toString() + ending);
return f;
private static void loadData(MutableComboBoxModel model, File f, JComboBox[] dependencies) {
//create file name
if (!useZip) {
f = getRelativeFile(f, dependencies);
//test if exists
if (f.exists()) {
try {
String s;
if (!useZip) {
s = IOUtils.loadTextFile(f);
else {
ZipFile zip = new ZipFile(f);
ZipEntry entry = zip.getEntry(getRelativeFile(f, dependencies).toString());
s = IOUtils.loadAllString(zip.getInputStream(entry));
int size = model.getSize();
for (int i = 0; i < size; i++) {
model.removeElementAt(0);
LineNumberReader lnr = new LineNumberReader(new StringReader(s));
lnr.readLine();
String line;
while ((line = lnr.readLine()) != null) {
model.addElement(line);
catch (IOException iox) {
iox.printStackTrace();
private static String getHeader(Component c) {
String name = c.getName();
return c.getClass().getName() + " " + (name == null ? "Unnamed" : name) + "\n";
public synchronized static void addToQueue(CommonListDataListener l) {
if (sQueue == null) {
sQueue = new ArrayList<CommonListDataListener>();
sQueue.remove(l);
sQueue.add(l);
if (sSingleton == null) {
sSingleton = new RememberData();
Thread t = new Thread(sSingleton, "Remember Data Thread");
t.setPriority(Thread.MIN_PRIORITY);
t.start();
} else {
RememberData.class.notify();
private static class CommonListDataListener implements ListDataListener {
private DefaultListModel mModel;
private MutableComboBoxModel mComboModel;
private ListDataEvent ev;
public CommonListDataListener(DefaultListModel model) {
mModel = model;
public CommonListDataListener(MutableComboBoxModel model) {
mComboModel = model;
public void contentsChanged(ListDataEvent ev) {
this.ev = ev;
addToQueue(this);
public void intervalAdded(ListDataEvent ev) {
this.ev = ev;
addToQueue(this);
public void intervalRemoved(ListDataEvent ev) {
this.ev = ev;
addToQueue(this);
void saveChanges() {
File file = mFileMap.get(mModel);
JComboBox[] dependencies = mComboDependencies.get(mModel);
PrintWriter pw = null;
try {
if (!useZip) {
file = getRelativeFile(file, dependencies);
pw = new PrintWriter(new FileWriter(file));
String contents = null;
contents = getSaveString();
pw.print(contents);
pw.close();
else {
ZipUpdate.update(file.getPath(), getRelativeFile(file, dependencies).toString());
catch (IOException iox) {
iox.printStackTrace();
public boolean equals (Object o) {
if (o instanceof CommonListDataListener) {
CommonListDataListener lis = (CommonListDataListener) o;
return lis.mModel == mModel;
return false;
private String getSaveString() {
StringBuilder sb = new StringBuilder();
if (mModel != null) {
int size = mModel.getSize();
for (int i = 0; i < size; i++) {
if (i != 0) {
sb.append('\n');
sb.append(mModel.getElementAt(i).toString());
return sb.toString();
//else
int size = mComboModel.getSize();
for (int i = 0; i < size; i++) {
if (i != 0) {
sb.append('\n');
sb.append(mComboModel.getElementAt(i).toString());
return sb.toString();
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