How to detect space key pressed event

I am working on a japplet where it is needed to pause the applet on the occurrence of a space bar key pressed event can anybody help
thanks in advance

Have a look at the tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/events/keylistener.html
http://java.sun.com/docs/books/tutorial/uiswing/misc/keybinding.html
-Puce

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How to detect any key pressed for program running in the background?

Hi All,
is it possible to detect when any key is pressed if a java program is not in the focus? For example, when I have a console based program I can write something like:
System.in.read();
and wait until any key is pressed. However, if I move the mouse away from the console and make any other window active, the console program "doesn't hear" anything. Ok, it's clear, of course, but how is it possible to make the program detect any keys pressed even if it's running in the background?
Thanks a lot for any hints!

qnx wrote:
1) Stop trying to make spyware. -> I don't do anything like this!
2) Stop re-posting the same questions. -> didn't know they are the same, sorry.
3) Stop taking us for fools. -> what? Honestly, I don't think that I realy deserved this :)With a limited posting history and the type of questions you are asking they are unusual.
There are very few legitimate problem domains that would require what you are asking about. There are illegitimate ones though. And the legitimate ones would generally require someone with quite a bit of programming experience and would also be required (the fact that java can't do it would not get rid of the requirement.)
Thus one might make assumptions about your intentions.

How to binding a key press event of "Esc" to "cancle" button

I create a class extended JComponent. Than I add a button named "cancle " to it.
Than I add the class's instance to a JDialog object.
I try to get the key press event through add a keyListener to the class instance, but no works.
I try to add a keymap and action map to the dialog 's getRootPane() also no works.
Who can tell me how can I do?

Thats the way I did it:
    // map escape key
    ActionListener escapeActionListener = new ActionListener()
      public void actionPerformed(ActionEvent e)
        cancelPressed();
    this.registerKeyboardAction( escapeActionListener,
                                 KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0, false),
                                 JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT );

How can i call key press event for dynamically created texbox

Hi,
I create a one texbox using javascript .now i want to call onFocus event that textbox.How is it

I develop grid application using javascript only.When they press add button dynamically add one row and each cell contain one textbox for enter new data.if they want to edit previous data when cursor goes to that textbox,all textvalue is selected format

How to invoke a key press event in application that has focus

Even though I know there are programs out there already that do this similar function, I want to write my own program that converts MIDI events into keypresses. Here is how it would work:
- my program does not have focus, some other app has focus while my app runs in the backround
-a midi event happens
-a mapping is done by my app running in the backround: midi event->keypress
-my app causes a keystroke event to be sent to whatever application has the focus.
my problem:
The part I am having trouble figuring out is how to invoke a keypress to the application that has the focus. Can someone shed some light how this would be done? I have learned a little about the Text Services Manager but this just a component of Carbon. I'd think that I needed to talk to a much lower level part of the operating system to be able to send a keypress to ANY app that is running.
I would prefer to work in Carbon, c++
The thing that would make my midi-keystroke program different from others out there is a much more complex mapping algorithm between the MIDI event and the keypress chosen. That's why I want to write my own.
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Jay

quartz event services contains the calls needed to perform this function

How to handle form close event or escape key press event for user defined f

Experts,
Please let me know how to handle form close event or escape key press event for user defined form...
Thanks & Regards,
Pravin.

Hi
You can catch the form close event like this
If ((pVal.FormType = 139 And (pVal.EventType = SAPbouiCOM.BoEventTypes.et_FORM_CLOSE)) And (pVal.Before_Action = True)) Then
      Try
               SBO_Application.SetStatusBarMessage(pVal.EventType.ToString())
      Catch ex As Exception
                SBO_Application.SetStatusBarMessage(ex.Message)
        End Try
      End If
Hope this helps
Regards
Arun

Detecting two keys press at one time

i need to do a event handler, say when user press shift + enter, it will do something, else enter would do another thing
i tried but i can't get the event handler to detect two key press, how do I go about it?

VK_ENTER vs (VK_ENTER + SHIFT_DOWN_MASK)

How to pass the key pressed in javascript

I'm asking this question here as I could not find the needed help elsewhere .
I don't know how to pass the key pressed in the function on OnKeyPress event .
I'm trying the following :
<input type="text" name="a" onKeyPress="check();">
I want to pass the key presses in the check function .
How to collect the key pressed in the function check ?
Thanks.

As I said above, that won't work in Mozilla.
In fact IMO Netscape/Mozilla javascript event handling has been behind IE since version 4.
Be that as it may: here is a workaround (for Mozilla): It seems you have to assign the onkeypress event for it rather than declaring it as part of the textfield.
Of the two textfields on this form, both work in IE, and only the first one will work properly in Mozilla. I left it in just to demonstrate the difference.
And a couple of links for ya
javascript forum: http://forums.webdeveloper.com/forumdisplay.php?s=&forumid=3
Keypress events: http://www.din.or.jp/~hagi3/JavaScript/JSTips/Mozilla/Samples/KeyEvent.htm
<html>
<head>
<script language="javascript" >

</script>
</head>
<body >
<form name="myform" method="post">
Test <input type="text" name="myTest"><BR>
Test <input type="text" name="myTest2" onKeyPress="check();"><BR>
<script> document.myform.myTest.onkeypress = check; </script>
</form>
</body>
</html>

I want to detect a key press

To detect a key press, i know i have to use the keylistener class
public class key implements KeyListener{
     public static void main (String args[]){
          addKeyListener(this);
          keyReleased(KeyEvent e) {}
          keyTyped(KeyEvent e) {}
          keyPressed(KeyEvent e) {
I built a simple program but it doesn't compile, it has an error.
All i want is to detect a key press and do something for key presses...
What am i doing wrong?

I once got the following demo file somewhere in the Sun/Java site, probably in one of the link cited above..
* Swing version
import javax.swing.*;
import java.awt.event.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
public class KeyEventDemo extends JApplet
                          implements KeyListener,
                                     ActionListener {
    JTextArea displayArea;
    JTextField typingArea;
    static final String newline = System.getProperty("line.separator");
    public void init() {
        JButton button = new JButton("Clear");
        button.addActionListener(this);
        typingArea = new JTextField(20);
        typingArea.addKeyListener(this);
        displayArea = new JTextArea();
        displayArea.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(displayArea);
        scrollPane.setPreferredSize(new Dimension(375, 125));
        JPanel contentPane = new JPanel();
        contentPane.setLayout(new BorderLayout());
        contentPane.add(typingArea, BorderLayout.NORTH);
        contentPane.add(scrollPane, BorderLayout.CENTER);
        contentPane.add(button, BorderLayout.SOUTH);
        setContentPane(contentPane);
    /** Handle the key typed event from the text field. */
    public void keyTyped(KeyEvent e) {
        displayInfo(e, "KEY TYPED: ");
    /** Handle the key pressed event from the text field. */
    public void keyPressed(KeyEvent e) {
        displayInfo(e, "KEY PRESSED: ");
    /** Handle the key released event from the text field. */
    public void keyReleased(KeyEvent e) {
        displayInfo(e, "KEY RELEASED: ");
    /** Handle the button click. */
    public void actionPerformed(ActionEvent e) {
        //Clear the text components.
        displayArea.setText("");
        typingArea.setText("");
        //Return the focus to the typing area.
        typingArea.requestFocus();
     * We have to jump through some hoops to avoid
     * trying to print non-printing characters
     * such as Shift. (Not only do they not print,
     * but if you put them in a String, the characters
     * afterward won't show up in the text area.)
    protected void displayInfo(KeyEvent e, String s){
        String charString, keyCodeString, modString, tmpString;
        char c = e.getKeyChar();
        int keyCode = e.getKeyCode();
        int modifiers = e.getModifiers();
        if (Character.isISOControl(c)) {
            charString = "key character = "
                       + "(an unprintable control character)";
        } else {
            charString = "key character = '"
                       + c + "'";
        keyCodeString = "key code = " + keyCode
                        + " ("
                        + KeyEvent.getKeyText(keyCode)
                        + ")";
        modString = "modifiers = " + modifiers;
        tmpString = KeyEvent.getKeyModifiersText(modifiers);
        if (tmpString.length() > 0) {
            modString += " (" + tmpString + ")";
        } else {
            modString += " (no modifiers)";
        displayArea.append(s + newline
                           + "    " + charString + newline
                           + "    " + keyCodeString + newline
                           + "    " + modString + newline);
}

Raise Key pressed event

Hello, any know how can I raise a key press event throw code. For example I want to simulate that the user has press the A Key. How can I do that throw code?
Thanks a lot !!

Hi there,
Your question has been discussed previously in the forums. Sounds like you want to programmatically click a button in WPF.
Please check out this post
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1329603&SiteID=1
Thanks,
Jennifer

Capture key press events with ExtendScript?

Is it possible to do this? I can't find an example in the documentation or online anywhere. I'd really like to know when the user presses the arrow keys while viewing the slideshow in Bridge.
Thanks!

Thanks for the example Paul. I can see how to listen to key down events on Windows and Dialogs that I create. Do you know of way to listen for global (app-wide) key down events? These are not defined:
app.addEventListener('keydown',...)
app.document.addEventListener('keydown',...)
I'm trying to add to the slideshow mode by having a little palette dialog with the context information shown that I need. The default caption box doesn't have what our artists want. If the palette window is in focus, I get the keydown event, but if they're using the arrow keys to flip through the slideshow, I can't capture those.
Thanks for the help.

Question about generate key press event to system. help plz.

I am wondering if it is possible to write a java program to generate key press event(not receiving)to the local system so all the other program in the system receive those key press event also. Thanks.

Hi,
:. I don't know what exactly you intend to accomplish. But, I have used the following code in order to simulate keys pressing inside a Java application.
      /* - - - Simulates TAB (java.awt.Event)
      EventQueue evtq = Toolkit.getDefaultToolkit().getSystemEventQueue();
      evtq.postEvent( new KeyEvent(this, KeyEvent.KEY_PRESSED,
                      0, 0, KeyEvent.VK_TAB, KeyEvent.CHAR_UNDEFINED) );
      evtq.postEvent( new KeyEvent(this, KeyEvent.KEY_RELEASED,
                      0, 0, KeyEvent.VK_TAB, KeyEvent.CHAR_UNDEFINED) );
      /* - - - Simulates Shift+TAB (java.awt.Event)
      evtq.postEvent( new KeyEvent(this, KeyEvent.KEY_PRESSED, 0,
                      InputEvent.SHIFT_DOWN_MASK, KeyEvent.VK_TAB,
                      KeyEvent.CHAR_UNDEFINED) );
      evtq.postEvent( new KeyEvent(this, KeyEvent.KEY_RELEASED, 0,
                      InputEvent.SHIFT_DOWN_MASK, KeyEvent.VK_TAB,
                      KeyEvent.CHAR_UNDEFINED) );:. However, as far as I know to send keys to the whole OS you have to create a 'Hook' as described inside Win32API documentation. That's for Microsoft Windows naturaly.
Cheers.
Roque

Unable to receive Tab key press event

Hello,
I have written a component which extends JComponent.
For that , when Tab key is pressed I need to process something.
I have overridden the function processKeyBinding in my class.
But I am not getting any event for tab key press. For all the other key press events, the function is being called.
I also tried to create a action and add it to the action map. But that is also not working.
Can anyone explain me why it is not working and give me the solution.
Thanks in advance,
Anu

public static void removeTabFromFocusTraverval(Component c) {
     int id = KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS;
     Set strokes = c.getFocusTraversalKeys(id);
     Set newStrokes = new HashSet(strokes);
     newStrokes.remove(KeyStroke.getKeyStroke("TAB"));
     c.setFocusTraversalKeys(id, newStrokes);
}

Can we fire key press event programmatically????

hi there,
is it possible in java to fire a key press event (of the associated component) programmatically??? like we can fire action event of a button by saying
button.doClick();
thanks in advance.
anshu

You can do so by using awt.Robot.keyPress(), just don't forget to do awt.Robot.keyRelease() afterwards!
Note that it doesn't work for Applets unless you sign them, for security reasons (you don't want to go into a site and have the applet click ctrl+alt+del for you, right?)
Cheers!
Moti

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

I want to accept a numerical value only when the key enter is pressed, but without using the event. How to detect the char "enter" with a numerical control?
Thanks!

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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How to detect space key pressed event

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