Capturing all keyboard events.

I'm using the keyboard to control a mobile robot through a Java applet.
I also have lots of other buttons in the applet. I don't want to add KeyListeners to all of the buttons. So is there a way to directly capture all keyboard events? So that no matter which button has the focus, the keyboard events would be processed?
Thanks a lot!

I don't want to add KeyListeners to all of the buttons.You could use a single KeyListener and add it to each button.
So is there a way to directly capture all keyboard
events? So that no matter which button has the focus,
the keyboard events would be processed?I don't know if this works or not, but check out Toolkit.addAWTEventListener().

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Just started with NetBeans IDE, need to capture all keyboard input!

Hello,
I discovered that I can only capture keyboard events when my GUI application has focus. Ok, but I need a functionality that can capture all keyboard input, even if my application runs in the background or in the system tray.
How can I achieve that?
Regards,
Mirza

I know...sorry, didn't mean to imply otherwise.Don't worry about it; I wasn't offended. (I didn't think that that was what you were tying to do.) I was trying to (subtly) take this a different direction. (Was going to write something Solaris specific or perhaps something in ASM that would effectively do what the O/P wanted. Seeing as how Key Loggers only serve one practical purpose - as far as I know - I just wanted to give him code that he could do nothing with.)

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<af:panelGridLayout> currently supports a client listener with mouse events.
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My assumption was that when the inputText is on focus, it should be able to capture keyboard events even though its invisible.
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"[email protected]" <[email protected]> wrote in message news:[email protected]..
I have figured out how to add menu Item to an existing EXE program, but I have not yet been able to figure out how to capture there events.  Any help would be greatly appreciated.
It's not entirely clear what you are trying to acieve. I think you're trying to add menu items to an exsisting exe without recompiling it, from LabVIEW. If so the following applies.
You have to hook the winproc. When a menu item is selected, windows send a message to the window's winproc. There are some API's that can be used to point the address of the winproc to another routine. This routine can do filtering, and then call the original routine.
Note that LabVIEW doesn't (or didn't until LV7) use windows menu's, so when a LabVIEW (or exe created with LabVIEW) menu item is called, windows will not send anything. That is the price for platform independency.
I think the OpenG site (or perhaps Winutils from NI) has some vi's to hook windows messages that are send to LabVIEW. Perhaps you can also use them hook another application.
Regards,
Wiebe.

Capturing typed keyboard events from another app

Hi everyone, thanks in advance for any help you might be able to give me.
I have written and inventory app and an point of sale app. I need some way to capture what is keyboarded into the inventory app so that I can fire some events in the pos app.
How can you capture typed keypresses if your app doesn't have direct focus? Can I request focus without impeding what is being typed into the other app??
Any ideas would be greatly appreciated ...
Ken.

You won't be able to request the focus and continue letting the user type in the inventory app.
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abraham.

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the query which i used to get that was
SELECT (DEQUEUE_TIME-DEQUEUED_MESSAGE_CREATE_TIME)*86400 LATENCY,
TO_CHAR(DEQUEUED_MESSAGE_CREATE_TIME,'HH24:MI:SS MM/DD/YY') CREATION,
TO_CHAR(DEQUEUE_TIME,'HH24:MI:SS MM/DD/YY') LAST_DEQUEUE,
DEQUEUED_MESSAGE_NUMBER
FROM V$STREAMS_APPLY_READER
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You can simply write a unique class as an ActionListener and in its actionPerformed method you do the following:
Object source = e.getSource(); // e is our event
if (source == component1) {
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No keyboard Events on a Window

Hello Java community,
I can't understand why, if you build a simple Window (not a Frame), all keyboard Events are simply ignored !! Everything acts as if the Window can't get the focus, because no LOST_ or GOT_ FOCUS events are triggered. This means that you can't handle keyboard events with a Window and therefore a Textfield will not work (however it still receive mouse events ??). BUT it perfectly works with a Frame , which extends from Window! Strange isn't it ?
I've heard on other forums that , to be eligible for focus a Window must have:
- its owner Frame (the one given in the constructor) :
* displayed on screen,
* containing a focusable component.
- itself, containing a focusable component.
thus i respect theses limitations, i still can't get any keyboard events
pleaze help, i am writing a text area component and without keyboard events ...

Thanks for the answers BUT,
I have already read the javadoc in every ways and I am sure I respect perfectly all the conditions to have my WINDOW focusable.
No, there is another problem, a strange one. In fact, my program works fine under Windows I can type characters into my Textfields but once executed under Linux : no keyboard events! Therefore, no character type allowed. I display in the console, all events that are incomming into my Window, and ALL events are ok (mouse, windows..) except keyboards ones. When I press a key, nothing appears in my console, that's why I think keyboards events are caught and not dispatched to the Window.
I noticed an interresting fact when using my app in Applet. For example, I launched my application with Mozilla (Netscape 4, JRE 1.1). I displayed an empty Window on screen, when my mouse passes over it or when I click, the Java console showed me these events. When I try to hit some keyboard keys, nothing except for certain keys such as F, G, D, J and numeric keys. In fact, these keys are shortcuts to some of the System class (F calls Finalization, G=Garbage Collector, D=Debug Mode...). I truely think that on a Window, all keyboard events are send to the console. Another fact that proved me that i was right : I tried my app with JRE 1.2, and when I wanted to type characters into my TextField (which is on my Window), the typed characters appeared in the console !!!!
A JAVA-experimented person told me to redirect the standard input to my own inputStream... but how ?
Any ideas of solutions ?

Capture All Mouse and Keyboard events even if java window NOT in FOCUS

Hi All,
Is this possible to capture all mouse and keyboard events even if java window is not in focus or is minimized. This java program should cature each and every event from the user once the program is started. Any help in this regard is appreciated!
Thanks&Regards
Sam

I don't think you can. (without JNI)

Lock all mouse and keyboard event.

i am looking ways to lock up all the mouse and keyboard events in windows...do u guy have ways to solve this?

Do you mean that people should not be able to start other applications, or switch to other running applications, before they have typed the right password into you java program? I don't think that can be done in java - it requires more control over the computer than Java typically gives you. You may have some success with full-screen AWT, though.
But why not use log-on-systems incorporated in whatever operating system you are using? Or some other netware thingie? Honestly, I think you are trying to reinvent the wheel, and even with tool that's not very appropriate.

Capture keyboard events using c# in SBO

How do I capture keyboard events(especially those with Control like CTRL-R) in SBO using C#??

Payal,
You will want to look at the UI API Help in the SDK Help Center and specifically look at the "SendKeys" method. This will allow you to send keyboard key strokes to the UI.
Your post is related to the Business One SDK. That forum for questions and answers for the Business One SDK is located on the SAP Business One page on SDN and then under the SAP Business One Discussion Forum. This forum is for the SAP Business One Integration Technology.
HTH,
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CS2: Listbox and keyboard events

Hello all,
I have a listbox widget in a Palette, I need to catch keyboard events specifically I need to be notified when the user presses the RETURN key.
I checked the PanelTreeView sample which defines a custom event handler but functions like KeyDown or KeyCmd are never called despite "CanHaveKeyFocus" has been modified to return kTrue.
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If the StageWebView has focus, you should be able to capture only the hardware key events (like BACK, ..). All the others are handled internally by StageWebView.
Do you see otherwise? If yes, can you post your application ?
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Raul

Responding to keyboard events when focus is lost

Is there any way to have a Java Application respond to keyboard events if the focus has been lost?

Media programs respond to keyboard events to turn up
the volume, etc... and the program does not have to
have the focus to do this.On the computer I'm using here, the keyboard button
to raise/lower the volume goes to the OS's volume control.
Not to an arbitrary application.
So the situation in your analogy is not mandatory.
And more generally, even if your app is not hidden,
users do not expect that it will "steal" keystrokes.
Let's say I download a very cool "World Clock Display"
program that displays the world time of New York
and Tokyo in the background.
Let's say I then go to my bank's website.
I do not want that the World Clock Program
(which is in full view) to capture my bank password.
(Clarification: on Windows, on Linux... it is
actually perfectly trivial for a C/C++ program
to capture all keystrokes in the background.
But I do not know if you can do it using Java or not)

Send a keyboard event from labview to C#

Hi,
We currently have a program in c# that takes keyboard inputs from a user and will fly a quadrotor. We aim to have a LabView .vi generate keyboard commands based on our experiment and send the commands to the c# code creating a feedback loop where the .vi will keep track of sensor and experimental data.
Our problem is that we have tried many different methods to send the keyboard commands in LabView.
1) http://zone.ni.com/devzone/cda/epd/p/id/3711
2) http://forums.ni.com/t5/LabVIEW/Send-keyboard-commands-to-another-windows-program/td-p/330670/page/2
as well as other variations and similar .vi's that do the same thing. Here is an example of a .vi used to press the letter "t" once.
http://i.imgur.com/hwmjZ.png
All of them can write the string to a text (open notepad put cursor in blank window) file but none can do it in such a way that it is detected by the c# code. On my own I can open and run the c# code and press keyboard buttons myself and the commands are recognized, so I think it could be an issue with how LabView sends the keyboard events and how c# reads them. Here is the c# code segment that we are using to read the input commands:
public override List<String> GetPressedButtons()
KeyboardState state = device.GetCurrentKeyboardState();
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Can anyone help trying to figure out why using the keybd_event function in LabView can not interface correctly with the above detection code in c#? I can provide any code and clarification if you think it can be helpful.
Thanks,
Andy

Hi,
I can't say with certainty where the problem is or even how many there are. I do know that the KeyboardListener.cs class should work according to what I have read online. I also know that if I press the keyboard myself then the state is changed and the correct action is taken. If I try to issue an event from Labview then the event is not captured. Here is the code, it is rather large ~20 MB.
https://www.dropbox.com/s/vsvcje1ro364otu/ARDrone.zip
https://www.dropbox.com/s/p3h3tj8bcqc29gk/Forward_backward0924.vi
The key listener is in ARDroneInput>Utils>KeyboardListener.cs and the polling takes place in ARDroneInput>KeyboardInput.cs
The reason I wanted to use keyboard inputs is because the quadrotor we are using takes keyboard commands W,A,S,D,T and L. Initially I thought having Labview issue these commands would be the simplest method. That may not be the case.
I was just thinking that it is not necessary that key events are sent from Labview. Instead, one could send an array representing the frequency of each button press rather than the button press directly. In that case an array that is updated continuously from Labview will just have to be kept track of in the C# code. The C# can then convert that to whatever control input we want. Can it be easier to send a vector of numbers in real time to C#?
If you think it is better to establish a connection between Labview and C# using .NET to send keyboard commands (rather than the vector idea above) can you explain that a little more? How does one go about doing that? If you think the vector idea is simpler how should the interface be set-up?
I just talked with my collegue and we think that maintaing a .txt file in Labview and having C# read it is the best option. We will begin working on that and will update you tomorrow.
Thanks,
Andy

Proper syntax for adding a keyboard event listener in Illustrator

Hi all,
Sorry for the newb question. For some reason, I am unable to capture any keyboard action in my extension. Probably doing it wrong....
My extension is a panel that only has buttons. The shortcuts for cut and paste become disabled after clicking on a button and I wanted to see if my extension could capture "command-x" and then fire the command via script.
Seems pretty basic, but for whatever reason I'm stumped. does the below look accurate? Why aren't I seeing any alert?
function keyHandler(){
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Also, when I do command A after clicking a button, it selects the objects in my extension panel. Then when I copy.... well, I get this....
LSC
Sure does seem like the panel has focus. Any workarounds?

OK. No wonder. It doesn't appear that the panel can pick up key commands unless it has focus. I created a text input and when that was active, my code worked fine. BUT, my panel doesn't HAVE a text input. I don't mind hacking something together with a hidden or super small box that has hidden focus, but it does not appear that autofucus or document.getElementById("id").focus(); works. Anybody confirm.
Does ANYBODY have any sort of workaround for this frustrating state of affairs. I just need for command + X to actually cut after clicking a button in my panel. I don't care if I have to send a menu-command to jsx. That would be fine. Just need to get focus somehow....

I have downloaded IOS7 on my iPhone and all calendar events have disappeared. The general functions of the calendar have changed and are definitely not 'user friendly'. How can I retrieve my calendar events. Will Apple improve the calendar function

I have downloaded IOS7 on my iPhone and all calendar events have disappeared. The general functions of the calendar have changed and are definitely not 'user friendly'. How can I retrieve my calendar events. Will Apple improve the calendar function or revert to the previous system. Even the typing function on IOS 7 is faulty - very slow to respond to the keyboard. I no longer enjoy using my iPhone. Can anyone assist. Thank you

Very strange! All of my calendar events have reappeared. This has happened one week after downloading iOS 7
The calendar however, is not easy to use.
The typing function on the phone has become even slower. Have to wait for each letter to show on screen.

Flex 4 does not dispatch keyboard events for ENTER key.

Hello everyone. I think I have a strange problem with Flex 4 Beta (4.0.0.8909). My application has had event listener for keyUp event for a month now and suddenly (two days ago) I've noticed that keyUp event is not dispatched for ENTER (ALT also) key. Anyone know why? By the way, I've tried this with keyDown event, also 4.0.0.8847 version of SDK - still the same: no keyboard events for ENTER (and ALT) key.
Here is the sample application that has got this issue:
<s:Application
   xmlns:fx="http://ns.adobe.com/mxml/2009"
   xmlns:s="library://ns.adobe.com/flex/spark"
   xmlns:mx="library://ns.adobe.com/flex/halo"
   minWidth="640" minHeight="480"
   keyUp="application1_keyUpHandler (event)">
   <fx:Script>
      <![CDATA[
         import mx.controls.Alert;
         protected function application1_keyUpHandler (event: KeyboardEvent):void
            Alert.show ("Key up: " + event.keyCode);
      ]]>
   </fx:Script>
   <s:layout>
      <s:BasicLayout/>
   </s:layout>
   <s:TextArea verticalCenter="0" horizontalCenter="0" width="200"/>
</s:Application>
If you run this application and try typing anything in a TextArea you will get alerts with key codes. However, if you press ENTER (or ALT), you will get no alert.
I'm pretty sure the code above is right so that means there is a bug in latest nightly builds of SDK (i would swhitch to an older build if i knew which one does not have this bug).
Any ideas?

Flex harUI wrote:
That's true, but in this case, I think the text editing code is eating ENTER key in order to prevent parents from seeing it and acting on it (like a submit button). We'll see if we can find a way around that.
You can get the ENTER key now by listening in capture phase.
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui
The enter key isn't being disposed of by textedit, the attached example code works without error if you a- remove the alert box and b-set the focus to your text area on initialisation. I agree that pressing the enter key then calling a dialog box will result in the enter key being "gobbled up" as the enter key is overridden by the dialog box code.
I think the first suggestion should be to anyone don't use dialogboxes for testing code. If for some reason debugging isn't desirable instead of a trace statement a simple label can be used as a 'fake' trace.
David
Message was edited by: David_F57: I worded this wrong, imho there is no need for a work around, the textarea component works as it should. When intercepting 'system' keycodes there is a need to consider the effect of the intercept and code appropriately to that end.

Capturing all keyboard events.

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