Key event handler

What is the best approach to handling key events (listening for keys being pressed)?
Are there any widgets out there for this purpose? Just do it in JavaScript?
Thanks

The best 'approach' for key events in Captivate e-learning courses is to avoid them as much as possible. They are a can of worms because every browser is different in terms of which keystrokes it will allow you to use. So you may find that you can use certain keystrokes in one browser but only some of them will work in another.
Widgets are not the answer because they are ActionScript and AS calls are close to the bottom of the pile. JavaScript will also only get you so far because even that happens AFTER the browser gets first pick.

Similar Messages

Sleutel Bind, fancy key events handler for standalone window managers

I began using Openbox in my laptop a while ago, and I was amazed by the speed, customization and simplicity it provides. After I started customizing my desktop I noticed that some of the special keys (TouchpadToggle, Volume, PrintScreen, etc) didn't worked at all. There are some applications for the Volume keys to work, but not for keys like touchpad-toggle and print-screen. Of course, there's a workaround for each case using simple scripts, but I wanted something a little more fancy, so I made:
Sleutel Bind
It's made in C and provides key events handling for:
XF86TouchpadToggle
Print (prtsc key)
It makes use of libnotify to display states ( touchpad enabled/disabled, screenshot taken, etc) and imlib2 (a very popular library, probably already installed in your system) to grab the screenshots. Almost all other keys are covered already by another application, but if needed, more key events will be added in the future.
Feel free to post your thoughts about Sleutel Bind, it's my first contribution to the community.
How to use
Once installed just run the command as a normal user.
If using openbox, place the following command in the "~/.config/openbox/autostart" file:
sleutelb &
Links
AUR
github
Last edited by DanielRS (2013-03-01 21:58:35)

mgmillani wrote:
I believe it must have been a bug and it was fixed, since print screen now works as expected. I'm using xmonad version 0.11-9, with ghc version 7.8.3.
davama wrote:
Note: for my print key to be recognized by xev i had to hold the ctrl key. that way it was not registered by xmonad. Also for xev command i use
xev | grep -A2 --line-buffered '^KeyRelease' | sed -n '/keycode /s/^.*keycode $[0-9]*$.* (.*, $.*$).*$/\1 \2/p'
Nice, that seems to be useful. Thanks!
@LQYMGT
Do you still have issues with the latest version? Otherwise I will mark this thread as solved.
well, still do not work... But I do not want to try it any more...So you can mark.

Programmatic change in multicolumn listbox value ignored by internal key event handler

The attached LabVIEW 8.5 vi demonstrates a problem I noticed using multicolumn listboxes. Upon changing the value (selected row) of the listbox programmatically, the very next press of the up or down arrow key behaves as if the value was never changed. For example, if the 3rd row is selected and then the listbox value is changed programmatically via a local variable or the value property to select the 0th row, pressing the down arrow key should now select the 1st row, but instead the 4th row is selected.
A workaround is to handle the Key Down? event myself as I've demonstrated in the attachment, but if this is a bug, I hope it can be corrected in a future release.
Larry
Attachments:
MC Listbox Bug.vi ‏30 KB

Hi Larry,
Pnt is correct and this is a known bug and relates to how the current row/ active row is handled when changing the values programmatically. Perhaps if you post your code we both can have a look and provide additional guidance.
Alternatively this forum post is related to your work around for using the event handler.
Regards,
Rishi L
National Instruments
Applications Engineer

Key event handling

i have a dialog with various components on it. i want to dispose the dialog by pressing 'escape'. that is happening fine, except for one case, when the focus is on a combo box. if the popup window is visible, then pressing escape closes it. otherwise, i think, it consumes the event. so,the event is not propogated and dialog remains visible.
any solution for this. thanx in advance.

You can only do this by disabling this capability of the JComboBox component. When focus is on one of these, the local key processing will override your global registration. To change the key mapping requires a little playing around with the UIManager and UIDefaults. Keep in mind - this will change the way all combo boxes behave.
   UIManager.put("ComboBox.ancestorInputMap",
         new UIDefaults.LazyInputMap(new Object[]
                 // Do not process ESCAPE
//                 "ESCAPE", "hidePopup",
         "PAGE_UP", "pageUpPassThrough",
                 "PAGE_DOWN", "pageDownPassThrough",
                 "HOME", "homePassThrough",
                 "END", "endPassThrough"
         }),Make sure you do this in your main(...) method, before you create any combos.
Mitch Goldstein
Author, Hardcore JFC (Cambridge Univ Press)
[email protected]

Handling Key Event

How to handle key events in the Console?
Plz give sample code for it.
Thanks in advance.

Don't have any experience with it personally, but I think curses does this type of thing http://sourceforge.net/projects/javacurses/

How to handle key events in iphone

I want to be able to detect physical keyboard (e.g. bluetooth) events in an iOS app.
In Mac, there is a class NSEvent which handles both keyboard and mouse events, and in ios (iphone/ipad) the counterpart of NSEvent is UIEvent which handles only touch events. I know ios API does not provide this functionality, but how can i handle key events in iphone???

in my application header part of the page is common of all page. header.jsff contains comandmenuItem named "proceduralhelp". if I click proceduralhelp a pop up opens .
in my login page when first time I open popup and press escape popup is not closing.
rest of the cases after login escpe will cose the popup.
only on the loginpage that to for the first time it is not closing when pressing up on escape key. (then we click on close button. and once again open the popup in loginpage now if we press escape it works).
Thanks,
Raghavendra.

How to handle Shift+Tab key event

HI,
This is Ramesh.I have added KeyListener to JTable. I am handling key events through key codes. But I am
unable to handling multiple key strokes like Shift+Tab
Can any one please give me suggestion how can I do it
Thanks & Regards
Ramesh K

i dont know about Key BindingsWhich is why you where given a link to the tutorial in the first response.
can you please give me suggestion.You've been given the suggestion 3 times. You can decide to learn to write code the way other Swing components are written. Or, you can do it the old way. The choice is up to you.

How to handle key events in popup component

Is there any possibility to handle keyboard events after a popup is opened
requirement : I want to close popup when I press escape key (by default this functionality is present but in some scenarios this is not working ) so explicitly i want to handle key events for popup.
Thanks,
Raghavendra.

in my application header part of the page is common of all page. header.jsff contains comandmenuItem named "proceduralhelp". if I click proceduralhelp a pop up opens .
in my login page when first time I open popup and press escape popup is not closing.
rest of the cases after login escpe will cose the popup.
only on the loginpage that to for the first time it is not closing when pressing up on escape key. (then we click on close button. and once again open the popup in loginpage now if we press escape it works).
Thanks,
Raghavendra.

Handling Enter key event in JTable

Hi...
This is particularly for the user "VIRAVAN"...
I have followed your method ,and got results too.. but the
processKeyBinding(.. method is called 4 times,same problem addressed by you before, but I didn't understood it...
Please help me...
Here is my code...
protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,int condition, boolean pressed)
System.out.println("Wait");
if (ks == KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0))
int selRow = getSelectedRow();
int rowCount = getRowCount();
int selCol = getSelectedColumn();
String val =(String)getValueAt(selRow,selCol);
boolean b= getCellEditor(selRow,selCol).stopCellEditing();
System.out.println(b);
System.out.println(rowCount-1 + " "+ selRow + " " + getSelectedColumn());
if((!val.equals("")) && selRow==rowCount-1)
System.out.println(rowCount-1 + " "+ getSelectedRow()+ " " + getSelectedColumn());
blank1 = new String[columns];
for(int p=0;p<columns;p++)
blank1[p]="";
Diary.this.datarows.addElement(blank1);
// dataModel.fireTableStructureChanged();
//dataModel.fireTableDataChanged();
Diary.this.dataModel.fireTableChanged(null);
else if(ks ==KeyStroke.getKeyStroke(KeyEvent.VK_1,0))
System.out.println("One One One One ");
return super.processKeyBinding(ks,e,condition,pressed);

It's been a while since I looked at the code, but essentially there are three key event types:
1) key pressed,
2) key typed,
3) key released.
So I would expect the processKeyBind to see all three of them. However, ks==KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0) is true only when a key typed event is detected (the other types can be ignored by passing it up the food chain where they will eventually be consumed). Now...., if I understand you correctly, you want to terminate edit on the present of Enter key, right? Here is how I'd suggest you do:
   protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed) {
      if (isEditing()) {
         Component editorComponent=getEditorComponent();
         editorComponent.stopCellEditing();
         return true;
      return super.processKeyBinding(ks,e,condition,pressed);
   }Ok.... now, it appears that you want to do something else also... i.e., add a new row to the table if the editing row is the last row and the editing column is the last column of the last row. You can't do that in the same thread (i.e., you must wait until the update in the current thread is completed). So, what you must do is use the SwingUtilities.InvokeLater, like this:
   protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed) {
      if (isEditing()) {
         Component editorComponent=getEditorComponent();
         editorComponent.stopCellEditing();
         if (getEditingRow()+1==getRowCount() && getEditingColumn()+1==getColumnCount()) {
            SwingUtilities.invokeLater(new Runnable() {
               public void run() {
// put the code for adding new row here
         return true;
      return super.processKeyBinding(ks,e,condition,pressed);
   }OK?
;o)
V.V.
PS: posted code is untest but should work!

Unable to get automatic event handling for OK button.

Hello,
I have created a form using creatobject. This form contains an edit control and Search, Cancel buttons. I have set the Search buttons UID to "1" so it can handle the Enter key hit event. Instead its caption changes to Update when i start typing in the edit control and it does not respond to the Enter key hit. Cancel happens when Esc is hit.
My code looks like this -
Dim oCreationParams As SAPbouiCOM.FormCreationParams
        oCreationParams = SBO_Application.CreateObject(SAPbouiCOM.BoCreatableObjectType.cot_FormCreationParams)
        oCreationParams.UniqueID = "MySearchForm"
        oCreationParams.BorderStyle = SAPbouiCOM.BoFormBorderStyle.fbs_Sizable
                Dim oForm As SAPbouiCOM.Form = SBO_Application.Forms.AddEx(oCreationParams)
oForm.Visible = True
'// set the form properties
        oForm.Title = "Search Form"
        oForm.Left = 300
        oForm.ClientWidth = 500
        oForm.Top = 100
        oForm.ClientHeight = 240
        '// Adding Items to the form
        '// and setting their properties
        '// Adding an Ok button
        '// We get automatic event handling for
        '// the Ok and Cancel Buttons by setting
        '// their UIDs to 1 and 2 respectively
        oItem = oForm.Items.Add("1", SAPbouiCOM.BoFormItemTypes.it_BUTTON)
        oItem.Left = 5
        oItem.Width = 65
        oItem.Top = oForm.ClientHeight - 30
        oItem.Height = 19
        oButton = oItem.Specific
        oButton.Caption = "Search"
        '// Adding a Cancel button
        oItem = oForm.Items.Add("2", SAPbouiCOM.BoFormItemTypes.it_BUTTON)
        oItem.Left = 75
        oItem.Width = 65
        oItem.Top = oForm.ClientHeight - 30
        oItem.Height = 19
        oButton = oItem.Specific
        oButton.Caption = "Cancel"
oItem = oForm.Items.Add("NUM", SAPbouiCOM.BoFormItemTypes.it_EDIT)
        oItem.Left = 105
        oItem.Width = 140
        oItem.Top = 20
        oItem.Height = 16
        Dim oEditText As SAPbouiCOM.EditText = oItem.Specific
What changes do i have to make to get the enter key to work?
Thanks for your help.
Regards,
Sheetal

Hello Felipe,
Thanks for pointing me to the correct direction.
So on refering to the documentation i tried out a few things. But I am still missing something here.
I made the following changes to my code -
oForm.AutoManaged = True
oForm.SupportedModes = 1 ' afm_Ok
oItem = oForm.Items.Add("1", SAPbouiCOM.BoFormItemTypes.it_BUTTON)
        oItem.Left = 5
        oItem.Width = 65
        oItem.Top = oForm.ClientHeight - 30
        oItem.Height = 19
oItem.SetAutoManagedAttribute(SAPbouiCOM.BoAutoManagedAttr.ama_Visible, 1, SAPbouiCOM.BoModeVisualBehavior.mvb_Default)
        oButton = oItem.Specific
        oButton.Caption = "OK"
AND
oForm.Mode = SAPbouiCOM.BoFormMode.fm_OK_MODE
oItem = oForm.Items.Add("1", SAPbouiCOM.BoFormItemTypes.it_BUTTON)
        oItem.Left = 5
        oItem.Width = 65
        oItem.Top = oForm.ClientHeight - 30
        oItem.Height = 19
oItem.AffectsFormMode = False
I get the same behaviour OK button changes to update and enter key does not work.
Could you please tell me find what is it that i am doing wrong?
Regards,
Sheetal

Macbook misses some key events for a few seconds

I have noticed that for last two months or so something strange happens to my Retina MBP. Once in a couple of days it stops responding to some key events. It is like it handles only one keypress out of 4-5. Nothing seems to be wrong with the keyboard and it is not about a particular key or keys. And about 10-15 seconds later everything goes back to normal. I do not see any suspicious messages in the logs, the computer is connected to the power supply...It happens just by itself in the middle of the day, when I am typing.
Almost looks like some interrupts get lost by the system while it is busy with something else. But I have checked the load level and running processes - nothing interesting there....And whatever it is - it happens during a very short period of time.

Hi,
No, I have not returned my MBP yet. In fact, I would rather avoid doing this unless I am convinced if it is a hardware issue. And I do believe it is not. Just recently I have spent some time investigating it and I have found very stroing correlation between the moments when this happens and these messages in the kernel log:
Jan 13 10:49:54 mbp-wifi kernel[0]: Sandbox: sandboxd(96471) deny mach-lookup com.apple.coresymbolicationd
Jan 13 10:54:31 mbp-wifi kernel[0]: Sandbox: sandboxd(96499) deny mach-lookup com.apple.coresymbolicationd
Jan 13 10:54:31 mbp-wifi.home sandboxd[96499] ([96497]): mdworker(96497) deny mach-lookup com.apple.ls.boxd
Jan 13 10:54:31 mbp-wifi.home sandboxd[96499] ([96498]): mdworker(96498) deny mach-lookup com.apple.ls.boxd
Jan 13 10:56:32 mbp-wifi.home sandboxd[96504] ([96503]): mdworker(96503) deny mach-lookup com.apple.ls.boxd
Jan 13 10:56:32 mbp-wifi.home sandboxd[96504] ([96502]): mdworker(96502) deny mach-lookup com.apple.ls.boxd
And I have also noticed that my Spotlight database gets reconstructed too often, which means it gets corrupted.
From all this I conclude that it is most likely the software issue and it seems to be linked to spotlight. I saw people reporting similar things. So now I am researching on how to fix it without disabling the spotlight.
In general, I believe that the quality of Apple software is going down, it is not like 4-5 years ago And Apple does seem to care less and less about it.
If in your case it happens all the time, not just once in a while, and you see that a particular key has problems - it is possible that we are talking about the different issues and yours might be really about the keyboard.

Event Handler Error while Creating User

Hi,
I am not able to create users in OIM 11gR1 - " Event handler DemoNotificationEventResolver implemented using class/plug-in nrma.DemoNotificationEventResolver could not be loaded."
I have deleted this plugin from the "plugins" table in the database. What else am I supposed to do?

Hi,
I have deleted it from the MDS Schema. Now I am getting a different error.
<Dec 20, 2012 5:24:57 PM EST> <Error> <oracle.iam.identity.usermgmt.impl> <IAM-3050030> <An exception occurred while performing the operation.
java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key IAM-301094
at java.util.ResourceBundle.getObject(ResourceBundle.java:374)
at java.util.ResourceBundle.getObject(ResourceBundle.java:371)
at java.util.ResourceBundle.getObject(ResourceBundle.java:371)
at java.util.ResourceBundle.getObject(ResourceBundle.java:371)
at java.util.ResourceBundle.getString(ResourceBundle.java:334)
at oracle.iam.ldapsync.impl.util.LDAPSyncUtil.createValidationFailedException(LDAPSyncUtil.java:700)
at oracle.iam.ldapsync.impl.util.LDAPSyncUtil.generateAndValidateRDN(LDAPSyncUtil.java:824)
at oracle.iam.ldapsync.impl.eventhandlers.user.RDNPreProcessHandler.execute(RDNPreProcessHandler.java:68)
at oracle.iam.platform.kernel.impl.OrchProcessData.runPreProcessEvents(OrchProcessData.java:898)
at oracle.iam.platform.kernel.impl.OrchProcessData.runEvents(OrchProcessData.java:634)
at oracle.iam.platform.kernel.impl.OrchProcessData.executeEvents(OrchProcessData.java:227)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.resumeProcess(OrchestrationEngineImpl.java:664)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.process(OrchestrationEngineImpl.java:435)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:381)
at oracle.iam.platform.kernel.impl.OrchestrationEngineImpl.orchestrate(OrchestrationEngineImpl.java:334)
at oracle.iam.identity.usermgmt.impl.UserManagerImpl.create(UserManagerImpl.java:653)
at oracle.iam.identity.usermgmt.api.UserManagerEJB.createx(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)

WPF UI running in seperate runspace - able to set/get controls via synchronized hash table, but referencing the control via the hash table from within an event handler causes both runspaces to hang.

I am trying to build a proof of concept where a WPF form is hosted in a seperate runspace and updates are handled from the primary shell/runspace. I have had some success thanks to a great article by Boe Prox, but I am having an issue I wanted to open up
to see if anyone had a suggestion.
My goals are as follows:
1.) Set control properties from the primary runspace (Completed)
2.) Get control properties from the primary runspace (Completed)
3.) Respond to WPF form events in the UI runspace from the primary runspace (Kind of broken).
I have the ability to read/write values to the form, but I am having difficulty with events. Specifically, I can fire and handle events, but the minute I try to reference the $SyncHash from within the event it appears to cause a blocking condition hanging both
runspaces. As a result, I am unable to update the form based on an event being fired by a control.
In the example below, the form is loaded and the following steps occur:
1.) Update-Combobox is called and it populates the combobox with a list of service names and selects the first item.
2.) update-textbox is called and sets the Text property of the textbox.
3.) The Text value of the textbox is read by the function read-textbox and output using write-host.
4.) An event handle is registered for the SelectionChanged event for the combobox to call the update-textbox function used earlier.
5.) If you change the selection on the combobox, the shell and UI hangs as soon as $SyncHash is referenced. I suspect this is causing some sort of blocking condition from multiple threads trying to access the synchronized nature of the hash table, but I am
unsure as to why / how to work around it. If you comment out the line "$SyncHash.TXT_Output.Dispatcher.Invoke("Send",[action]{$SyncHash.TXT_Output.Text = $Value})" within update-textbox the event handler will execute/complete.
$UI_JobScript =
try{
Function New-Form ([XML]$XAML_Form){
$XML_Node_Reader=(New-Object System.Xml.XmlNodeReader $XAML_Form)
[Windows.Markup.XamlReader]::Load($XML_Node_Reader)
try{
Add-Type –AssemblyName PresentationFramework
Add-Type –AssemblyName PresentationCore
Add-Type –AssemblyName WindowsBase
catch{
Throw "Unable to load the requisite Windows Presentation Foundation assemblies. Please verify that the .NET Framework 3.5 Service Pack 1 or later is installed on this system."
$Form = New-Form -XAML_Form $SyncHash.XAML_Form
$SyncHash.Form = $Form
$SyncHash.CMB_Services = $SyncHash.Form.FindName("CMB_Services")
$SyncHash.TXT_Output = $SyncHash.Form.FindName("TXT_Output")
$SyncHash.Form.ShowDialog() | Out-Null
$SyncHash.Error = $Error
catch{
write-host $_.Exception.Message
#End UI_JobScript
#Begin Main
add-type -AssemblyName WindowsBase
[XML]$XAML_Form = @"
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Window.Resources>
<DataTemplate x:Key="DTMPL_Name">
<TextBlock Text="{Binding Path=Name}" />
</DataTemplate>
</Window.Resources>
<DockPanel LastChildFill="True">
<StackPanel Orientation="Horizontal" DockPanel.Dock="Top">
<Label Name="LBL_Services" Content="Services:" />
<ComboBox Name="CMB_Services" ItemTemplate="{StaticResource DTMPL_Name}"/>
</StackPanel>
<TextBox Name="TXT_Output"/>
</DockPanel>
</Window>
$SyncHash = [hashtable]::Synchronized(@{})
$SyncHash.Add("XAML_Form",$XAML_Form)
$SyncHash.Add("InitialScript", $InitialScript)
$Normal = [System.Windows.Threading.DispatcherPriority]::Normal
$UI_Runspace =[RunspaceFactory]::CreateRunspace()
$UI_Runspace.ApartmentState = [System.Threading.ApartmentState]::STA
$UI_Runspace.ThreadOptions = [System.Management.Automation.Runspaces.PSThreadOptions]::ReuseThread
$UI_Runspace.Open()
$UI_Runspace.SessionStateProxy.SetVariable("SyncHash",$SyncHash)
$UI_Pipeline = [PowerShell]::Create()
$UI_Pipeline.Runspace=$UI_Runspace
$UI_Pipeline.AddScript($UI_JobScript) | out-Null
$Job = $UI_Pipeline.BeginInvoke()
$SyncHash.ServiceList = get-service | select name, status | Sort-Object -Property Name
Function Update-Combobox{
write-host "`nBegin Update-Combobox [$(get-date)]"
$SyncHash.CMB_Services.Dispatcher.Invoke($Normal,[action]{$SyncHash.CMB_Services.ItemsSource = $SyncHash.ServiceList})
$SyncHash.CMB_Services.Dispatcher.Invoke($Normal,[action]{$SyncHash.CMB_Services.SelectedIndex = 0})
write-host "`End Update-Combobox [$(get-date)]"
Function Update-Textbox([string]$Value){
write-host "`nBegin Update-Textbox [$(get-date)]"
$SyncHash.TXT_Output.Dispatcher.Invoke("Send",[action]{$SyncHash.TXT_Output.Text = $Value})
write-host "End Update-Textbox [$(get-date)]"
Function Read-Textbox(){
write-host "`nBegin Read-Textbox [$(get-date)]"
$SyncHash.TXT_Output.Dispatcher.Invoke($Normal,[action]{$Global:Return = $SyncHash.TXT_Output.Text})
$Global:Return
remove-variable -Name Return -scope Global
write-host "End Read-Textbox [$(get-date)]"
#Give the form some time to load in the other runspace
$MaxWaitCycles = 5
while (($SyncHash.Form.IsInitialized -eq $Null)-and ($MaxWaitCycles -gt 0)){
Start-Sleep -Milliseconds 200
$MaxWaitCycles--
Update-ComboBox
Update-Textbox -Value $("Initial Load: $(get-date)")
Write-Host "Value Read From Textbox: $(Read-TextBox)"
Register-ObjectEvent -InputObject $SyncHash.CMB_Services -EventName SelectionChanged -SourceIdentifier "CMB_Services.SelectionChanged" -action {Update-Textbox -Value $("From Selection Changed Event: $(get-date)")}

Thanks again for the responses. This may not be possible, but I thought I would throw it out there. I appreciate your help in looking into this.
To clarify the "Respond to control events in the main runspace"... I'm would like to have an event generated by a form object in the UI runspace (ex: combo box selectionchanged event) trigger a delegate within the main runspace and have that delegate in
the main runspace update the form in the UI runspace.
ex:
1.) User changes selection on combo box generating form event
2.) Event calls delegate (which I have gotten to work)
3.) Delegate does some basic processing (works)
4.) Delegate attempts to update form in UI runspace (hangs)
As to the delegates / which runspace they are running in. I see the $synchash variable if I run get-var within a delegate, but I do not see the $Form variable so I am assuming that they are in the main runspace. Do you agree with that assumption?

Event Handling in Fullscreen Exclusive Mode???????

WIndows XP SP2
ATI 8500 All-In-Wonder
JDK 1.6
800x600 32dpi 200 refresh
1-6 buffer strategy.
the graphic rendering thread DOESN'T sleep.
Here's my problem. I have a bad trade off. In fullscreen exclusive mode my animation runs <30 fps and jerks when rendering. i.e. stop and go movement (not flickering/jittering just hesitant motion) when the animation is running. I solved this problem by raising the thread priority of the rendering (7-8). . . this resulted in latency/no activity for my input events both key and mouse. For instance closing the program alt-f4 will arbitrarily fail or be successful when the thread priority is raised above 6.
How does one accomplish a >30 fps and Instant event handling simultaneously in Fullscreen Exclusive Mode?
Is there a way to raise thread priority for event handling?
Ultimately I want to be able to perform my animations and handle key and mouse input events without having a visible 'hiccups' on the screen.
Much Appreciated!

If I remember correctly the processor is a 1.4(or)6ghz AMD Duron
Total = 1048048kb
Available = 106084kb
Sys Cache = 211788kb
PF Usage = 1.01 GB
I solved some of the problem after posting this thread. . . .
I inserted a thread.sleep(1) and my alt-f4 operation worked unhindered with the elevated thread priority.
I haven't tested it with mouse event or any other key event but at the moment it looks I may have solved the problem.
If so, my next question will be is there a way to reduce the amount of cpu power needed to run the program.
I'm afraid that the other classes that I'm adding will actually become even more process consuming than the actually rendering thread.
public class RenderScreen extends Thread
// Screen Rendering status code
protected final static int RUNNING = 0,
                             PAUSED = -1;
// frames per second and process time counters
protected long now = 0, fps = 0, fpsCount = 0, cycTime = 0;
// thread status
protected int status = 0;
protected Screen screen;
public void setStatus(int i){ status = i; };
public void setTarget(Screen screen){ this.screen=screen; };
public void run()
    setName("Screen Render");
    screen.createBufferStrategy(1);
    screen.strategy = screen.getBufferStrategy();
    for(;;)
      if(status == RUNNING)
        now = System.currentTimeMillis();
        while(System.currentTimeMillis() <= now+1000)
          // call system processes
          // fps increment / repaint interface
          fpsCount++;
          screen.renderView();
          try { Thread.sleep(1);}catch(InterruptedException ie){ ie.printStackTrace(); }
        fps = fpsCount;
        cycTime = System.currentTimeMillis() - (now + 1000);
        fpsCount=0;
public RenderScreen(){};
public RenderScreen(Screen screen){ this.screen=screen; };
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
public class Screen extends Window
BufferedImage image = new BufferedImage(800,600,BufferedImage.TYPE_INT_RGB);
Graphics2D gdd = image.createGraphics();
MediaTracker tracker = new MediaTracker(this);
Image bground = getToolkit().getImage("MajorityRule.jpg"),
        bawl = getToolkit().getImage("bawl.gif");
RenderScreen rScreen = new RenderScreen(this);
BufferStrategy strategy;
Graphics g;
Rectangle rect = new Rectangle(400,0,150,150);
//Game game = new Game();
public void renderView()
    g = strategy.getDrawGraphics();
    //--------- Game Procedures [start]
    gdd.drawImage(bground,0,0,this);
    gdd.drawString("fps: ["+rScreen.fps+"] Cycle Time: ["+rScreen.cycTime+"]",0,10);
    //--------- Game Procedures [end]
    //---------test
    gdd.drawImage(bawl,rect.x,rect.y,rect.width,rect.height,this);
    rect.translate(0,1);
    g.drawImage(image,0,0,this);
    //g.dispose();
    strategy.show();
public Screen(JFrame frame)
    super(frame);
    try
      tracker.addImage(bground,0);
      tracker.addImage(bawl,1);
      tracker.waitForAll();
    catch(InterruptedException ie){ ie.printStackTrace(); }
    setBackground(Color.black);
    setForeground(Color.white);
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MajorityRule extends JFrame
// Graphic System Handlers
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Screen screen = new Screen(this);
Paper paper = new Paper();
public void windowed()
    paper.setSize(getWidth(),getHeight());
    getContentPane().add(paper);
    setResizable(false);
    setVisible(true);
public void fullscreen()
    DisplayMode dMode = new DisplayMode(800,600,32,200);
    screen.setBounds(0,0,800,600);
    if (gd.isFullScreenSupported()) gd.setFullScreenWindow(screen);
    if (gd.isDisplayChangeSupported()){ gd.setDisplayMode(dMode); };
    screen.setIgnoreRepaint(true);
    screen.setVisible(true);
    screen.rScreen.setPriority(Thread.MAX_PRIORITY);
    screen.rScreen.start();
    screen.requestFocus();
public MajorityRule(String args[])
    setTitle("Majority Rule [Testing Block]");
    setBounds(0,0,410,360);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    getContentPane().setLayout(null);
    if (args.length > 0 && args[0].equals("-window")) windowed();
    else fullscreen();
public static void main(String args[])
    new MajorityRule(args);
};

Event Handling in Abstract Portal Component

Hi Friends,
I am using HTMLB Classlib in an Abstract Portal Component to develop a Dropdownlistbox. Now I want to handle the event of change of selection in this dropdown. However, this event is not getting captured. Sample code is as follows:
public class dropdownsimple extends AbstractPortalComponent
                       public void onClick(Event event)
                       public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)
                                                IPageContext myContext1 = PageContextFactory.createPageContext(request, response);
          Form myForm = myContext1.createFormDocument("CRMForm");
          GridLayout myGrid = new GridLayout();
          DropdownListBox drp = new DropdownListBox("drp");
          drp.addItem("Key 1","Item 1");
          drp.addItem("Key 2","Item 2");
          drp.setOnSelect("onClick");
                                                 myGrid.addComponent(1, 1, drp);
          myForm.addComponent(myGrid);
          myContext1.render();
I am able to see the dropdown box along with values when I preview the PAR iView created from this component. Please let me know how to capture the event of change of selection in the dropdown?
Edited by: Shetul Chothani on Jun 21, 2011 6:37 AM

Hi,
Change this line
drp.setOnSelect("onClick");
to
drp.setOnSelect("click");
and leave the line
public void onClick(Event event)
as it is, and it should work just fine.
I.e., if you name your event "fooBar", the event handler should be named "onFooBar"
Cheers,
Robin

Key event handler

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