Listener of a JPanel that listens to events of its components

Is there a listener (that I can add to a JPanel) that listens to events generated by the panel's components?
Award: 2 duke stars

Well it ought to.
If you need further help then you need to create a [url http://homepage1.nifty.com/algafield/sscce.html]Short, Self Contained,
Compilable and Executable, Example Program that demonstrates the
incorrect behaviour, because I can't guess exactly what you are doing
based on the information provided.
And don't forget to use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags so the code retains its
original formatting.

Similar Messages

Coalescing events from multiple components in a JPanel

Hi,
I've got a JPanel based form with several components (mostly JTextField) and I'd like to be able to have component events bubble up to the parent JPanel. By comparison to MFC, if I have a dialog box with several controls all of the control events will continue to percolate upwards until they are handled. Is there any such possibility with Swing?
Ideally I would like it if all component events were routed to a single listener in the parent JPanel, all I really need to do (initially) is set a boolean to note that a change may have been made. Do I have to explicitly set a handler for each component or is there way to automagically have the parent to catch the events from its child components?
Thanks!
jam

Thanks jvaudry, this is kinda what I suspected. It seems somewhat cumbersome to have to set up a listener for each of the many JTextField's in my form but definitely wrapping all of that up in a class is a good way to go. I'm pretty new to Swing and usually when something seems harder than it should it's a sure sign that I just don't know how to do it right :)
I may try an altogether different approach just for curiousity's sake. I'm thinking of adding a method to the parent JPanel that will iterate all of its text fields and create a checksum of their combined contents. The idea is that I will compute the checksum once after populating the form and then later to see if any of the fields have changed. A simple notion that may not turn out to be so simple once I get to coding, but it's worth a try.
Thanks!
jam

Listen for Events from anywhere

Hello!
I have an application with a rather complicated component hierarchy.
How can I have it so that I can listen for events from any component in any component, regardless of who is who's child?
Thank you!

You need a broadcasting mechanism.
Many architecture framework offers this facility, but as a quick hack you can try something like
public class Broadcaster extends EventDispatcher ( singleton anti pattern )
instance
then just do Broadcaster.instance.addEventListener or removeEventListener. it's a crappy singleton, but at least it does not hold any global state.
I've also seen people use Application.application to dispatch/listen globally but really don't like it.
Note : Use weak references or your views will never be eligible for garbage collections.

Listening to Events from inside loaded swf

In Flash Builder 4 I have a swfLoader with which I load swf files. The swf files that get loaded get created in Flash Pro, and I would like to be able to listen for events from the level that they get loaded from. What would I have to specify in the Flash file for the path? Can't seem to be able to specify the right path.
Thanks a lot for any help!

I wouldnt say this is elegant but we have been having issues gaining direct access to the SWF's loaded in via OSMF. However I have done setups where I dispatch an event from a SWF and have it bubble up and catch it on the MediaContainer level. Not elegant but works- otherwise may need to make a custom MediaElement and bypass the SWFElement to gain tighter control - seems like there should be a better way, but I havnt found it.

Sevice Contract - Listener for Events Queue Issue

Hi,
The Listener for Events Queue in our Production environment ran very long, It took about 3+ hrs to complete the program. Is there any thing specific that we can check as part of RCA.
Further there were 'library cache lock' found ... how this can impact the performance and how library cache lock works.
Regards
Tauseef E Ahmad

Hi Team,
i used the following code for recognizing the key events.
String javaScriptKeyListener =
" function keyListener() "
+" { "
+" alert(window.event.keyCode) ; } ";
OAWebBean body = pageContext.getRootWebBean();
if (body instanceof OABodyBean)
((OABodyBean)body).setOnLoad("onKeyPress = javascript:keyListener()");
but it is not working as expected..
Any suggestions ??
Regards
Sridhar

Event Handling: how to listen to events generated by JInternalFrame buttons

Hello all,
Could someone give a hint on how to let JFrame listen to event(s) generated by JInternalFrame button(s)? Suppose these buttons are private members of the JInternalFrame, the the JInternalFrawe is shown inside the JFrame. Please suggest some simple ways.
Thank you.
ljiang006

Why does JFrame care about any buttons that you've placed in a JInternalFrame? What might be the case, is a custom class you've written that extends and/or contains a JFrame cares about such buttons so that it can update a display or do some processing or whatever. In which case you have your custom class implement ActionListener and register it with the button for ActionEvents via an addActionListener call. Then in your actionPerformed method is can tell the JFrame to redisplay, etc.

Cannot listen to events on 64-bit Photoshop

Hi,
I use PSEventAdapter.getInstance().addEventListener() to listen to events (eg: layer change). This works alright with Photoshop 32-bit but not with the 64-bit version.
     var transformEventID = 1416785510;
     PSEventAdapter.getInstance().addEventListener(transformEventID, function(csEvent) {
         // do something here
Any idea why this could be? I'm on Windows.

The problem was that we hadn't copied the PSHostAdapter.8li plugin to the Adobe Photoshop 64-bit's Plugins folder. Copying it solved the issue.

Listening to event from custom component

I have a main.mxml file, and 2 custom components: component1.mxml and component2.mxml
I want to dispatch an event from component1 and handle it in component 2.
I'm able to do this by handling the event first in the main.mxml then passing it on.
But is there a way not to involve main.mxml, and to directly listen to the event from component 1 and handle it in component 2?
I need to listen the event in actionscript, not mxml.

You can dig in to custom event handlers
Best Regards,
Yogesh

ICal no longer listening for event notifications in 10.5.4

Up until 10.5.4, iCal would automatically add todo's and calendar events to its display when an event was created from an external app using the CalendarStore framework...
Not anymore... The events are created, but you need to click on a different view to get iCal to realize something has been added to the calendar
What's the normal way to submit a bug report to Apple on this?

Hi,
the normal way is to submit feedback over here: http://www.apple.com/feedback/ical.html
Björn

Zooming a Jpanel that contains Jbutton

My question is how to zoom a jpanel that contains several jbutton... I am not sure what method to use.... when using a Graphics2D object there seem to be only methods as g.drawString(...)
g.drawRectangle(..) etc... I am kind of familiar with
AffineTransform, scaling matrix, etc but not how to zoom a jpanel with jcomponent...
I hope some one out there understand what i am trying to do...please could you give me any idea
thanx

Hello.
The solution could be the following:
1. Create interface ZoomPane with the following methods:
boolean isZoomMode
float getZoomFactor
2. ZoomPane interface must be implemented by some JComponent (JPanel will fit, assume it's called JZoomPanel)
3. the paint method's body of the JZoomPanel should looks like:
Graphics2D g2 = (Graphics2D)g;
if(isZoomMode()){
float zoomFactor = getZoomFactor();
g2.scale(zoomFactor, zoomFactor);
super.paint(g);
4. Use updated RepaintManager.
This solution solve all painting problem. The mouse event transformation problem can be solved as described above (by means of the glass pane).

The description for Event ID 0 from source VSTTExecution cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.

Hi,
Can any one help me on the below issue ?
while executing automated test case in test center it is showing as test case is in progress, then i navigated to virtual machine (where the test agent is online), there Internet
explore has opened automatically and my test case execution started, but with in a seconds IE has closed . However, in test center, test case status is showing as in
progress, after 2 or 3 min some of test cases getting passed and some are failed.
Here my question is in lab center-->virtual machine, IE has opened automatically and navigated the 2 or 3 links and with in seconds IE has getting closed. Why IE is getting closed without completing execution?
Error Message :
The description for Event ID 0 from source VSTTExecution cannot be found. Either the component that raises this event is not installed on your local computer or the
installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
(mtm.exe, PID 5240, Thread 4) FileAggregatorSessionInfo: Error occurred while deleting temporary directoryException: System.IO.DirectoryNotFoundException: Could not find a part of the path
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.Delete(String fullPath, String userPath, Boolean recursive, Boolean checkHost)
at Microsoft.VisualStudio.TestTools.Execution.Aggregation.FileAggregator.FileAggregatorSessionInfo.DeleteTemporaryDirectory(String temporaryDirectory)
the message resource is present but the message is not found in the string/message table
Thanks
Suresh
Suresh

Hi,
Can any one help me on the below issue ?
while executing automated test case in test center it is showing as test case is in progress, then i navigated to virtual machine (where the test agent is online), there Internet
explore has opened automatically and my test case execution started, but with in a seconds IE has closed . However, in test center, test case status is showing as in
progress, after 2 or 3 min some of test cases getting passed and some are failed.
Here my question is in lab center-->virtual machine, IE has opened automatically and navigated the 2 or 3 links and with in seconds IE has getting closed. Why IE is getting closed without completing execution?
Error Message :
The description for Event ID 0
from source VSTTExecution cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
(mtm.exe, PID 5240, Thread 4) FileAggregatorSessionInfo: Error occurred while deleting temporary directoryException: System.IO.DirectoryNotFoundException:
Could not find a part of the path
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.Delete(String fullPath, String userPath, Boolean recursive, Boolean checkHost)
at Microsoft.VisualStudio.TestTools.Execution.Aggregation.FileAggregator.FileAggregatorSessionInfo.DeleteTemporaryDirectory(String
temporaryDirectory)
the message resource is present but the message is not found in the string/message table
We are using VS 2013 (premium) and IE 10.0, scripts have been created on the same versions. It is working fine on
developers command prompt but the same tests are getting failed in lab center test agent machine
test agent log:
QTAgentService.exe, AgentService: calling AgentObject.RunEndFileCopyComplete
QTAgentService.exe, AgentProcessManager.WaitForDataCollectionAgentProcessToStart: waiting for agents to start.
QTAgentService.exe, AgentProcessManager.WaitForDataCollectionAgentProcessToStart: Agents started.
QTAgentService.exe, AgentProcessManager.PerformActionIgnoringExceptions: Successfully called 'Cleanup' on the test agent
QTAgentService.exe, AgentProcessManager.PerformActionIgnoringExceptions: Calling 'StopDataCollection(int)' on the data collection agent
QTAgentService.exe, AgentProcessManager.IsDataCollectionAgentNeeded: IsExecutedOutOfProc? True
QTAgentService.exe, AgentPro
QTAgentService.exe, AgentProcessManager.WaitForDataCollectionAgentProcessToStart: Agents started.
QTAgentService.exe, AgentService: Connection to controller is up.
Thanks
Suresh

Is there a way to create a new Calendar that replicates all events

Is there a way to create a new Calendar that replicates all events from a subscribed calendar ? Mobile Me is great but my most important Calendar is technically in the "Subscriptions" category so it doesn't get pushed to me iPhone. I want to create a new Calendar and have it just automatically copy all the events from the subscribed calendar and keep up to date with that one.

lincolnroadjeff,
I subscribed to a Holiday calendar that I also wanted to be published, and the only workaround that I found was to export the calendar, delete the subscription, and then import the calendar.
This obviously will only work with a subscription that is not often updated/subject to change.
;~)

Calling a method on a jFrame from a jPanel that created by the jFrame

Hi all
I can not for the life of me work out how to do this.
Calling a method on a jFrame from a jPanel that created by the jFrame.
I have used this code to set a handle for one jPanel to another.
i.e I can create new jpanel and pass in handles from one to another but not back to the jFrame.
// this is sudo code
private Panel_Top topPanel;
private Menu_Panel menuPanel;
private DataPanel dataPanel;
//create new
    topPanel = new Panel_Top();
    menuPanel = new Menu_Panel();
    dataPanel = new DataPanel();
// add handles from one to another
    menuPanel.setDataPanel(dataPanel);
    topPanel.setDataPanel(dataPanel);
    topPanel.setMenu_Panel(menuPanel);
    dataPanel.setMenu_Panel(menuPanel);
// in each class I use this to set
public void setDataPanel(DataPanel dataPanel) {
    this.dataPanel = dataPanel;
}But I can not seam to get a handle back to the jFrame that created it.
Please help
as you can see I am trying but no luck so far
Thanks

class Life extends JPanel{
      pulic Life( JFrame owner )
            owner.doSomething(); // pass the JFrame to the constructor and feel free to use it
}[code[

I have a related but different problem... I prefer that the photos/events on my iPhone and iPad be in "date created" order. Does anyone know if this is possible? Apple...please give us some options.

I have a related but different problem... I prefer that the photos/events on my iPhone and iPad be in "date created" order. Does anyone know if this is possible? Apple...please give us some options!!!

This response is a little late as I just read about your problem. I have a 2012 Dodge Charger and a 2012 Chrysler Town and Country and both worked flawlessly with the iPhone 5s my wife and I had. However, we just upgraded to the iPhone 6 and Uconnect will receive calls but you cannot answer them. You can callout successfully, however. the annoyance being the inability to answer incoming calls in the HandsFree mode.

Is there any event that triggers when you switch between components?

is there any event that triggers when you switch between components?
like for example... when i switch between components, i need a function to fire everytime i switch...
ive tried show, hide, and initialize... and none of them work...
any ideas or help is greately appretiated!!

Depends on what you are trying to do,
you have mouseover and mouseout and mouseclick events which you can use on the component and write code to deal with what you want to happen when you change focus. You have keypress event which would allow you to monitor tabbing between components, remember that in most events the currentTarget and target values will give you the information you need to handle component interaction.
so
[Bindable] private var CurrentObject: Object; <------- use this as a pointer to what ever object you are currently focused on or just to indicate things have changed
addeventListener(MouseEvent.CLICK,myCompponentSwap);
protected function myComponentSwap(e:event): void
    if (CurrentObject !=e.currentTarget && CurrentObject != null)
         do what you want becuase a component switch just happened
    CurrentObject = e.currentTarget;
Hope this gets you started.
David

Listener of a JPanel that listens to events of its components

Similar Messages

Maybe you are looking for