How to detect key navigation in JTable

Hi,
I have a problem with JTable's events. When the user presses the mouse's left button on a cell, a mouseClicked event is generated, and my program works fine. But when the user moves from cell to cell with the cursor keys or the tab key, no mouseClicked event is generated, and my event code doesn't execute. I have seen listeners like TableColumnModelListener, but I don't want two or more events at the same time: i.e. if I go from cell 1,1 to cell 2,2, I just want one event, not one for the column and another for the row. I just want ONE event for "selection change", originated by mouse or keyboard. What should I use?
I'm using Java 1.4.
Thanks.

[url http://java.sun.com/docs/books/tutorial/uiswing/misc/keybinding.html]How to use Key Bindings

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Tab Key Navigation in JTable

Hello All,
Can anyone please help me with Tab key navigation in a JTable.I
read all the messages in this group but couldn't implement one.It
would be a great help if anyone can provide me a working example of how
to control the tab key in the JTable. I have a JTable with some of the
columns not editable, I want the focus to be in the first cell and
whenever the TAB key is pressed, the focus should go to next editable
cell and select the data in it.For example: if you take a simple table of 4 columns with column 2 not editable, The focus should begin with the first cell(1st column,1st row) and goto (3rd column,1st row) whenever TAB is pressed.It should work in reverse when SHIFT-TAB is pressed.
I'm new to Java Swing.I would greatly appreciate if anyone can provide me a working example.
Thanks in advance,
siddu.

OK Here is what I have ...
public class MultipleEditorsPerColumnJTable extends JTable {
/** Creates a new instance of MultipleEditorsPerColumnJTable */
public MultipleEditorsPerColumnJTable( int the_column) {
this.myColumn = the_column;
this.rowEditors = new ArrayList();
setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,int condition, boolean pressed) {
boolean isSelected = false;
if (ks == KeyStroke.getKeyStroke(KeyEvent.VK_TAB,0)) {
int selRow = getSelectedRow();
int rowCount = getRowCount();
int selCol = getSelectedColumn();
if (selCol == 1) { isSelected= getCellEditor(selRow,selCol).stopCellEditing();}
int targetRow = (selRow + 1) % rowCount;
this.editCellAt(targetRow, 1);
this.getComponentAt(targetRow, 1).requestFocus();
return super.processKeyBinding(ks,e,condition,pressed);
I think I know why the requestFocus() is not working. OK, I have a MultipleEditorsPerColumnJTable (sub of JTale), JTextPane, JButton and JLabel. The textpane, label and button have individual editors and renderers. Each time I want to display a new Row, I re-render these components and add it to the table.
Now with the above code, it still navigates to the next component in the row/ first column in next row depending on the current column. What am I doing wrong?
Thanks,
Praveen.

How to detect key board event

HI,
How to detect keyboard event (Like CTRL key press shift key press) in Swing�any can any body suggest classes and interface for that�.
Thanks

[url http://java.sun.com/docs/books/tutorial/uiswing/misc/keybinding.html]How to use Key Bindings

Key navigation for JTable

I have a JTable and i need to select its rows during key navigation.
Say i have 23 columns in this table and just for test purposes everytime on keypressed i want to select 2nd row. I am doing it in following way within KeyPressed Event.
int[] indexes = table.getSelectedRows();
table.requestFocus();
int[] cols = table.getSelectedColumns();
for (int xx=0; xx<cols.length; xx++ )
table.removeColumnSelectionInterval(cols[xx],cols[xx]);
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table.setColumnSelectionInterval(0,22);
table.setRowSelectionInterval(2,2);
But this doesn't seem to work on keypressed event although it works fine if i call it from some other place like a button pressed. Any help gurus ???
TIA

Sorry i missed to mention what it actually seems to do. It only selected the 1st column when this piece of code is called from KeyPressed Event.
But when the same code is called from any other place it selects all the 23 columns.
I will appreciate any help on this bottleneck problem for me.

How to detect the key enter with a numerical control without using loop event?

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When the user edits a numeric control with a keyboard, its property "key focus" is true. When the user hits enter, key focus becomes false. Poll the property to latch the control valuse at the true-false transition. That won't work if the user modify the control using up and down arrows.
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I've been trying to listen to key press in JTable,
However it only works if the cell is double-clicked.
If the tab button is use or the cell is single-clicked, nothing happens to the listener.
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table.getColumnModel().addColumnModelListener(new TableColumnModelListener(){
public void columnAdded(TableColumnModelEvent e){}
public void columnMarginChanged(ChangeEvent e){}
public void columnMoved(TableColumnModelEvent e){}
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How do I get key navigation to work in Labview PDA?

I want to be able to press a key on my Windows CE device and toggle a boolean control on my application. However, when I set the key navigation for the control to toggle with F1, it doesn't work? What am I doing wrong?

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If you would like to make a product suggestion that this be supported, I would encourage you to go to ni.com and click Contact NI.
Jarrod S.
National Instruments

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ANSWER: HOW TO DETECT Java Plugin from JavaScript

I created a new topic because the questions about
how to detect Java Plugin in browsers are scattered
thoughout this forum.
Basically you need to employ two approaches for IE and NS.
In IE you need to try to instantiate a small applet
(not your production applet) in order to see if browser
can do it. if the browser can do it, you can make a
call applet from JavaScript in order to find version of
JRE (as well as a host of other things).
In NS you can write a simple JavaScript which will
interrogate the browser for all plugins installed. Then
ypu can make a desicion whether to pass execution to
the next(or generated) page which hosts your applet,
or ask the user to download/install a plugin.
I ecourage everybody to host a plugin on your site
rather leave default link to it which is generated by
html converter.
In order to run sample,
Prerequisites:
Java Plugin 1.3.
If you have a different version of plugin,
substitute hardcoded plugin version in JavaScript for
value that you have.
1. compile java file
2. put class file in the same directory with html file
3. load html file into the browser.
4. press "Check Java Plugin.." button
5. see it work
6. examine code
7. uninstall plugin
8. repeat steps 1 - 4
9. see it work
10. install plugin.
Sample code follows:
**********************HTML FILE BEGIN***********
<HTML>
<HEAD>

<TITLE>Detect Java Runtime</TITLE>
</HEAD>
<SCRIPT LANGUAGE="JavaScript">
var browsername;
function doNetscape()
for (i=0; i < navigator.plugins.length; i++)
for (j = 0; j < navigator.plugins.length; j++)
if(navigator.plugins[i][j].type == "application/x-java-applet;version=1.3")
alert("You are running Netscape with Java Plugin 1.3.0 - OK");
return;
alert("You are running Netscape\nPlease, install Java Runtime Environment 1.3.0");
function doMicrosoft()
var applet = document.myApplet;
if(applet == null)
alert("You are running Microsoft Browser.\nPlease, install Java Runtime Environment 1.3.0");
return;
var version = applet.getJavaVersion();
if(version == "1.3.0")
alert("You are running IE, Java Plugin 1.3.0 installed - OK");
else
alert("You are running IE, other plugin installed - mybe OK if later that 1.3.0\nYour version: " + version);
function getJava()
var applet = document.myApplet;
if(applet == null)
alert("Please, install Java Runtime Environment");
return;
     alert("JRE Version: " + document.myApplet.getJavaVersion());
function checkJavaPlugin()
     browsername = navigator.appName;
     if(browsername.indexOf("Netscape")!= -1)
          browsername="NS";
          doNetscape();
     else
          if(browsername.indexOf("Microsoft")!=-1)
               browsername="MSIE";
               doMicrosoft();
          else
               browsername="N/A";
               alert("Unknown browser: " + browsername);
</SCRIPT>
<body>
<Strong>Check Java Plugin</strong>
<OBJECT id="myApplet" classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
     WIDTH = 1
     HEIGHT = 1 >
     <PARAM NAME = CODE VALUE = "DetectPluginApplet.class" >
     <PARAM NAME="scriptable" VALUE="true" >
     <embed type="application/x-java-applet;version=1.3"
          code = DetectPluginApplet width = 2 height = 2 MAYSCRIPT = "true" >
     </embed>
     </EMBED>
</object>
<FORM>
     <INPUT TYPE="button" value="Get Plugin Version in IE" onClick="getJava()">
     <INPUT TYPE="button" value="Check Java Plugin in NS and IE" onClick="javascript:checkJavaPlugin()">
</FORM>
</BODY>
</HTML>
**********************HTML FILE END***********
***************APPLET FILE BEGIN***********
import java.awt.*;
public class DetectPluginApplet extends java.applet.Applet
     public void init()
          add(new Label("DetectPluginApplet"));
public String getJavaVersion()
return System.getProperty("java.version");
**************APPLLET FILE END************

Try following java script, it works on new browsers (NS 4+, IE5+). For IE you have to enable 'ActiveX objects creation' in security options.
var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_nav = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
&& (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
&& (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
var is_nav4up = (is_nav && (is_major >= 4));
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
var is_ie5_5 = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
var is_ie6 = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.0") !=-1));
var is_ie5up = (is_ie && (is_major == 4)
&& ( (agt.indexOf("msie 5.0")!=-1)
|| (agt.indexOf("msie 5.5")!=-1)
|| (agt.indexOf("msie 6.0")!=-1) ) );
var pluginDetected = false;
var activeXDisabled = false;
// we can check for plugin existence only when browser is 'is_ie5up' or 'is_nav4up'
if(is_nav4up) {
// Refresh 'navigator.plugins' to get newly installed plugins.
// Use 'navigator.plugins.refresh(false)' to refresh plugins
// without refreshing open documents (browser windows)
if(navigator.plugins) {
navigator.plugins.refresh(false);
// check for Java plugin in installed plugins
if(navigator.mimeTypes) {
for (i=0; i < navigator.mimeTypes.length; i++) {
if( (navigator.mimeTypes[ i].type != null)
&& (navigator.mimeTypes[ i].type.indexOf(
"application/x-java-applet;jpi-version=1.3") != -1) ) {
pluginDetected = true;
break;
} else if (is_ie5up) {
var javaVersion;
var shell;
try {
// Create WSH(WindowsScriptHost) shell, available on Windows only
shell = new ActiveXObject("WScript.Shell");
if (shell != null) {
// Read JRE version from Window Registry
try {
javaVersion = shell.regRead("HKEY_LOCAL_MACHINE\\Software\\JavaSoft\\Java Runtime Environment\\CurrentVersion");
} catch(e) {
// handle exceptions raised by 'shell.regRead(...)' here
// so that the outer try-catch block would receive only
// exceptions raised by 'shell = new ActiveXObject(...)'
} catch(e) {
// Creating ActiveX controls thru script is disabled
// in InternetExplorer security options
// To enable it:
// a. Go to the 'Tools --> Internet Options' menu
// b. Select the 'Security' tab
// c. Select zone (Internet/Intranet)
// d. Click the 'Custom Level..' button which will display the
// 'Security Settings' window.
// e. Enable the option 'Initialize and script ActiveX controls
// not marked as safe'
activeXDisabled = true;
// Check whether we got required (1.3+) Java Plugin
if ( (javaVersion != null) && (javaVersion.indexOf("1.3") != -1) ) {
pluginDetected = true;
if (pluginDetected) {
// show applet page
} else if (confirm("Java Plugin 1.3+ not found, Do you want to download it?")) {
// show install page
} else {
// show error page
}

Detect key status of '*', '#' & '0' of using getKeyStates() method

Any know the how to get key status if using getKeyStates() method of GameCanvas object in pressing keys "*", '0' & '#' (as I know, the method just can detect key pressing of number 1~9)? If no, is there any method able to do so (similar function of getKeyStates() but not keyPressed()) or how to modify the method able to function it ?

Hello,
Sorry for the confusion... let me try to be more clear...
So, my test campaign for a specific UUT is composed of about a dozen sequences, which can be run independently. But I created another sequence, to work as a "batch", calling all these dozen sequences.
Pretty much what it does is:
1) Call first sequence in new execution
2) Wait for execution to finish
3) Check results of execution
4) Add results to report
5) Wait 10 seconds
6) Call second sequence in new execution
7) So on...
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The way I'm doing this (in step 3 above) is with the following expression:
( Find( RunState.PreviousStep.ResultStatus, "Passed", 0, True, False ) >= 0 ) ) ? "Passed" : "Failed"
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Enter key as Tab Key in a JTable

How can I have the Enter Key act as a Tab Key in a JTable?

thnx...but I already solved my problem. In case someone has the same problem:
final InputMap im = table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
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Regarding Tab key Navigation in a page

Hi,
I have a requirement regarding the tab key navigation on a page.
Suppose the focus is on the last field of a page, on clicking the tab key i should go to the first field in the page not the url. i tried using tab index, but the problem is that after coming back to the first field from the last field, on clicking on tab again it does not go on as usual, it suddenly jumps to the url from there.
Regards
Krishna

OK Here is what I have ...
public class MultipleEditorsPerColumnJTable extends JTable {
/** Creates a new instance of MultipleEditorsPerColumnJTable */
public MultipleEditorsPerColumnJTable( int the_column) {
this.myColumn = the_column;
this.rowEditors = new ArrayList();
setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, Collections.EMPTY_SET);
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,int condition, boolean pressed) {
boolean isSelected = false;
if (ks == KeyStroke.getKeyStroke(KeyEvent.VK_TAB,0)) {
int selRow = getSelectedRow();
int rowCount = getRowCount();
int selCol = getSelectedColumn();
if (selCol == 1) { isSelected= getCellEditor(selRow,selCol).stopCellEditing();}
int targetRow = (selRow + 1) % rowCount;
this.editCellAt(targetRow, 1);
this.getComponentAt(targetRow, 1).requestFocus();
return super.processKeyBinding(ks,e,condition,pressed);
I think I know why the requestFocus() is not working. OK, I have a MultipleEditorsPerColumnJTable (sub of JTale), JTextPane, JButton and JLabel. The textpane, label and button have individual editors and renderers. Each time I want to display a new Row, I re-render these components and add it to the table.
Now with the above code, it still navigates to the next component in the row/ first column in next row depending on the current column. What am I doing wrong?
Thanks,
Praveen.

Key navigation

how can i use Key navigation ( Enter KeY)For two boolean ( Ok1,OK2)in one vi,because it work only for one when irun the program.
someone can help me with a sample
Attachments:
Key.vi ‏54 KB

Instead of using Key Navigation, try the event structure like in the attached example. I didn't use the Booleans in the example but you can add those as well.
Attachments:
Key_mod.vi ‏56 KB

How to detect plug-ins path for Photoshop CC?

Hi
I downloaded new CC SDK but unfortunatelly in html doc there is not info how to detect a plug-in path for new Photoshop CC. Pdf doc also contains very old info (still for Photoshop 5.0)
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Dear All,
I want to use PCI-1200 to control a Xicor X9C103P digital potentiometer.
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digital potentionmeter to increase or decrease its resistance accordingly.
Each keystroke control the potentiometer to change a fixed amount, say,
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If you are refering to the ability to capture user key strokes you will need to add a listener to the class. If is a matter of is it a charater or a number then look into isDigit. Or are you trying to capture Hot-Keys? Please specify and will see if we can help - Bart

How to detect key navigation in JTable

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