Strange screen behaviour/desktop corruption

Has anyone else seen anything like this behaviour on a Mac? Everything was working fine until yesterday when this started when there was a blurring and duplication of the Finder windows and icons on the desktop. That then became an effect which is a bit hard to describe, it was like there was a scattering of different colour minute pixels around the edges of Finder windows and icons on the desktop. Did try changing the desktop pattern and restarting and the problem stopped for a short while but it's now back again, though it doesn't affect the icons on the dock it's especially problematic in applications such as Mail (see one screenshot below). I've attached a couple of screenshots to try and give a better idea of what's going on as it's a little hard to describe!
[IMG]http://i795.photobucket.com/albums/yy237/bvggraphics/TerryDesktop.png[/IMG]
[IMG]http://i795.photobucket.com/albums/yy237/bvggraphics/Picture1.png[/IMG]
If anyone has any suggestions they'd be greatly appreciated!

I believe what you see is only a software problem and it's very likely caused by the Skype sofware. Since your screen goes blue for a moment it looks like there's some resolution change happening. Try to change your monitor resolution manually via System Preferences. Does it look the same? You don't need to uninstall directly. First go to Sys Prefs/Accounts and look what startup objects there are. If you see anything that doesn't "belong" there (like Skype) just remove it and do a reboot to find out if the situation has changed.
Björn
PS: Hey, my 333th post!

Similar Messages

Strange Screen Behaviour When Scrolling

Hi,
anyone seen this before?
When users have scroll down in a panel, some display elements overlap each oher (see the two screenshots). By scrolling up and down a few times they can get their display back to normal.
Saurabh
Attachments:
overlap.jpg (102.2 K)

I also have a very simple screen with just 3 drop downs and 7 radio button which show the same behaviour. Though due to security reasons I cannot post that screen over here. I work on a virtual machine and I do not see this problem happening for me, but our clients work on normal PCs and they see it every time they scroll the screen.
So does that mean that there does not exist any solution for this problem? I cannot move to AIR at this time.

Strange screen behaviour on new imac

Have had the new imac for a couple of weeks now and all of a sudden the display has started behaving very strangely. Intermittently it is distorting - jagged lines and graphics screwed. Screen capture is linked here:
http://www.malw.co.uk/photos/screencap.jpg
Hope someone can help! Thanks.

I was hoping I wouldn't have to do that. I've been on the phone for two hours to Applecare who have tried reinstalling OSX (archive mode?), PRAM reset etc. The computer is fine though in safe mode, which leads me to believe the problem might be software based? Their solution now is a complete reinstall so basically I have to spend not only time reinstalling but getting everything back in order - I have an 80gb itunes library and 20gb of photos for starters, plus a load of software I've installed. Anyway, before I have to take that rather drastic route, hopefully someone might come up with something I haven't tried yet.

Strange screen/video behaviour Satellite Pro P100-109

I have strange problems with my Sattelite Pro (P100-109 model pspa3e 00n009du). I have the impression the on board video card is letting me down, so if somebody has a solution then please help!
Yesterday, while working properly since I bought the machine, I had some strange video behaviour. Black arround icon's windows not properly updating etc.
After a reboot of the system these problems seemed resolved but this lasted only for a view minutes.
After a while I got a blue screen (BCCode: ea BCP1... BCP4:00000001 SP: 2.0 ) searching the Internet learned that his had to do with the video driver.
Symptoms of the display:
- Vertical dotted lines shown on the toshiba bios screen (all kinds of colors)
- Windows loading show some vertical lines as well
- After loading clickable items appear black (window titles - No buttons shown/rendered)
- Display turns black every 4 seconds
- System responds very slow but sometimes it seems that it works normally
- mouse dissappears
- After some time only a black screen is shown, system does not respond anymore.
- In windows Safe mode (so not using the nvidia drivers) the display seems to work normally
Did the following trying to resolve my issue unsuccesfully:
- I uninstalled/removed the nvidia drivers and installed the latest ones from the toshiba site.
- Removed original drivers and installed drivers from Guru3D site (also used the Driverutility from the same site).
- I uninstalled/removed the nvidia drivers and installed the original ones
- Upgraded to SP3
Uninstalling the driver (in safe mode) and thus using only a generic driver seems to work.
Does anybody know how this could be resolved or are these signs that the nVidia GeForce Go 7900 has been roasted.

Hi
Long story. short answer....
It could be really possible that your GPU chips malfunctions.
I came to this conclusion because the notebook symptoms dont occur if the graphic card driver is not installed.
If the graphic card driver would be installed then the graphic card would run with best performance and possibly the graphic issues would appear again.
I think you cannot do anything what could solve this issue apart from contacting the ASP in your country and asking for the help.
Good luck

Strange Finder behaviour since installing Mountain Lion

I've been experiencing some strange finder behaviour since updating to Mountain Lion. Folders take several seconds to open after clicking on them (and sometimes won't open at all) and files cannot be moved around the desktop or dragged on to an app. However, it is possible to open a file by clicking on it. I've tried re-booting with Snow Leopard and everything seems OK, but as soon as I go back to ML, the problem starts again.

Library is a folder, not a file. There're more than one Library folders, one at the root and one for each user in your Mac. All of them are hidden, this is why you can't find them. But you can see their contents using
Finder Menu > Go > Go to Folder
And then type:
~/Library
for your Library Folder
-or-
/Library
for the root Library folder.

Sourcing 7.0 - Strange Login Behaviour for enterprise user

Hello
We have installed SAP Sourcing 7.0 and created one tenant and after that everything was running fine. I have now created another tenant. After this there is a strange login behaviour for enterprise user
When I go to the ...../fsbuyer/portal URL, it given me a login screen. When I try to login with enterprise user and password as specified in the context, it does not let me login even with a correct password. The error is "User Authentication Failed"
I just happened to try NW CE Administrator Login, after this the error changed to "Entry does not exist". Here I gave enterprise user and password and it logged into the system. So I now have to login two times once with NW UME User and other with enterprise user to access the setup page.
However this is the problem only for enteprise user and not for other user accounts that I created. I checked in NW UME, the enterprise user does not exist there. However I can see that other users that I created using "Internal User Accounts" are also created in NW UME.
Anyone faced this behaviour earlier?
This also brings out a very interesting point. In Multi-Tenant Setup when using NW UME does this mean that two tenants cannot share the same user account. Is that so?
Regards,
Shubham

Hi Vikram,
Thanks a ton for your reponse.
I would like to understand your solution regarding creating another cluster.
Does this mean I need to install another CE Instance and install sourcing on the same.
OR
I have to create an Add-In instance for the current CE Server and define the Host Name of Add-In Instance in the new cluster
Also in this cluster, which context should I select, System Context or Existing Tenant Context or New Tenant Context.
Regards,
Shubham

Strange problem with desktop

Hi, I have a very strange problem with desktops and dashboards something else. For example, when I am on desktop 2 and i go to desktop 1, when I click with the mouse on it, it goes again to desktop 2. or when I am on desktop 1 and I go to ddashboard, it returns again to desktop 1 when i click to something in the dashboard.
but, if i am on desktop 3, and i go to desktop 1 throguh desktop 2, there is no problem. the same if i go from desktop 2 to dashboard.
I hope i've been clear enough to let you understand this... explanation =P
Anyone can help?

My system has started "freezing". Actually, usually when I'm browsing the net, Chromium stops loading pages. Conky stops updating, and usually I can't switch to another programs. I can't start xkill from menu, menu opens but nothing starts. If I run "ls" etc in Terminal, nothing happens
I can however control+alt+F1 to CLI, but if I try to login nothing happens.If doesn't help even if I kill X (I started it with startx). And if I don't kill X, I can't go back from CLI with control+alt+F7, there's just a black screen.
I'm using Nvidia drivers also, and XFCE4. This started happening some time ago, I think I was using Gnome2 back then. And I have updated my system, and this has happened at least with 3 kernel versions. There's nothing on logs. Well, actually, there's "TCP: Possible SYN flooding on port 6881. Sending cookies" errors on everything.log. But those don't happen when system freezes. And sometimes Chromium stops loading pages but other programs don't freeze, I think it's a problem with cache or something.
Not really sure if this everything happens because of Chromium. I think I'm gonna switch back to Firefox and see what happens. Usually I'm running Chromium, Opera (use it just for a couple of pages), couple of Terminals and Kaffeine.

Strange graphic behaviour

Hi everybody,
on my MacBookPro Mid2010 I get a strange graphics behaviour:
The screen sometimes looks like this:
http://www.apfeltalk.de/forum/attachments/78146d1324206564-macbook-pro-grafikfeh ler-screenshot.jpg
(This is not my own image, but my issue looks exactly the same!)
Has anyone ever seen this?
Does someone know, why it appears?
Or things I can do against it?

You can see this problem on my video : http://youtu.be/fvKaRJZlVco. With this problem Apple change my motherboard for free. I hope this video will help you.
The problem happens when your macbook pro 15 core i7 mid-2010 passes the intel graphics card to nvidia 330M graphics card with iPhoto for example.
Apple text :
http://support.apple.com/kb/TS4088
Sorry for my bad english.

I saturated all the available iPad (3rd. generation) screen space (home screens or desktop space) with apps, and the apps that got bumped out of the last screen, mysteriously disappeared? Where are those missing quick lauch app icons?

Running my 3rd generation iPad on iOS 7.0.4, I saturated all the available iPad screen space (which would be the 15 home screens or desktop worth of space) with apps, and the apps that got bumped out of the last screen space mysteriously disappeared. Where are those missing quick lauch app icons now? The apps are still installed and can be searched/accessed through the finder, but they no longer have a user friendly access. How can I solve this problem?

Christopher Doryan wrote:
Hi Hexonxonx, thanks for trying to help, but next time please read the entire discussion, in oder to better comprehend what is being asked. The reason being is that your answer added nothing to what had already been mentioned.
Like I said, I was aware it was possible to access the apps through the finder, but the question revolved around how to recover the quick launch app icons for certain vanished apps.
Wow, kind of a snotty response to someone who was taking their own time to offer help. Whether you thought it was helpful or not, didn't deserve such an unkind retort. Maybe when you realize we all just users here trying to help others like you, who have issues and we don't get anything in return for the countless hours some people here spend offering that assistance, you'll maybe be a little less quick to be critical.
Just sayin.......
Oh and Meg offered the right answer. Put your Apps in Folders, which will create extra space for the apps which have disappeared.

Strange memory behaviour using the System.Collections.Hashtable in object reference

Dear all,
Recently I came across a strange memory behaviour when comparing the system.collections.hashtable versus de scripting.dictionary object and thought to analyse it a bit in depth. First I thought I incorrectly destroyed references to the class and
child classes but even when properly destroying them (and even implemented a "SafeObject" with deallocate method) I kept seeing strange memory behaviour.
Hope this will help others when facing strange memory usage BUT I dont have a solution to the problem (yet) suggestions are welcome.
Setting:
I have a parent class that stores data in child classes through the use of a dictionary object. I want to store many differenct items in memory and fetching or alteging them must be as efficient as possible using the dictionary ability of retrieving key
/ value pairs. When the child class (which I store in the dictionary as value) contains another dictionary object memory handeling is as expected where all used memory is release upon the objects leaving scope (or destroyed via code). When I use a system.collection.hashtable
no memory is released at all though apears to have some internal flag that marks it as useable for another system.collection.hashtable object.
I created a small test snippet of code to test this behaviour with (running excel from the Office Plus 2010 version) The snippet contains a module to instantiate the parent class and child classes that will contain the data. One sub will test the Hash functionality
and the other sub will test the dictionary functionality.
Module1
Option Explicit
Sub testHash()
Dim Parent As parent_class
Dim d_Count As Double
'Instantiate parent class
Set Parent = New parent_class
'Create a child using the hash collection object
Parent.AddChildHash "TEST_hash"
Dim d_CycleCount As Double
d_CycleCount = 50000
'Add dummy data records to the child container with x amount of data For d_Count = 0 To d_CycleCount
Parent.ChildContainer("TEST_hash").InsertDataToHash CStr(d_Count), "dummy data"
Next
'Killing the parent when it goes out of scope should kill the childs. (Try it out and watch for the termination debug messages)
'According to documentation and debug messages not really required!
Set Parent.ChildContainer("TEST_hash") = Nothing
'According to documentation not really as we are leaving scope but just to be consistent.. kill the parent!
Set Parent = Nothing
End Sub
Sub testDict()
Dim Parent As parent_class
Dim d_Count As Double
'Instantiate parent class
Set Parent = New parent_class
'Create a child using the dictionary object
Parent.AddChildDict "TEST_dict"
Dim d_CycleCount As Double
d_CycleCount = 50000
'Blow up the memory with x amount of records
Dim s_SheetCycleCount As String
s_SheetCycleCount = ThisWorkbook.Worksheets("ButtonSheet").Range("K2").Value
If IsNumeric(s_SheetCycleCount) Then d_CycleCount = CDbl(s_SheetCycleCount)
'Add dummy data records to the child container
For d_Count = 0 To d_CycleCount
Parent.ChildContainer("TEST_dict").InsertDataToDict CStr(d_Count), "dummy data"
Next
'Killing the parent when it goes out of scope should kill the childs. (Try it out and watch for the termination debug messages)
'According to documentation and debug messages not really required!
Set Parent.ChildContainer("TEST_dict") = Nothing
'According to documentation not really as we are leaving scope but just to be consistent.. kill the parent!
Set Parent = Nothing
End Sub
parent_class:
Option Explicit
Public ChildContainer As Object
Private Counter As Double
Private Sub Class_Initialize()
Debug.Print "Parent initialized"
Set ChildContainer = CreateObject("Scripting.dictionary")
End Sub
Public Sub AddChildHash(ByRef ChildKey As String)
If Not ChildContainer.Exists(ChildKey) Then
Dim TmpChild As child_class_hashtable
Set TmpChild = New child_class_hashtable
ChildContainer.Add ChildKey, TmpChild
Counter = Counter + 1
Set TmpChild = Nothing
End If
End Sub
Public Sub AddChildDict(ByRef ChildKey As String)
If Not ChildContainer.Exists(ChildKey) Then
Dim TmpChild As child_class_dict
Set TmpChild = New child_class_dict
ChildContainer.Add ChildKey, TmpChild
Counter = Counter + 1
Set TmpChild = Nothing
End If
End Sub
Private Sub Class_Terminate()
Debug.Print "Parent being killed, first kill all childs (if there are any left!) - muahaha"
Set ChildContainer = Nothing
Debug.Print "Parent killed"
End Sub
child_class_dict
Option Explicit
Public MemmoryLeakObject As Object
Private Sub Class_Initialize()
Debug.Print "Child using Scripting.Dictionary initialized"
Set MemmoryLeakObject = CreateObject("Scripting.Dictionary")
End Sub
Public Sub InsertDataToDict(ByRef KeyValue As String, ByRef DataValue As String)
If Not MemmoryLeakObject.Exists(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
End Sub
Private Sub Class_Terminate()
Debug.Print "Child using Scripting.Dictionary terminated"
Set MemmoryLeakObject = Nothing
End Sub
child_class_hash:
Option Explicit
Public MemmoryLeakObject As Object
Private Sub Class_Initialize()
Debug.Print "Child using System.Collections.Hashtable initialized"
Set MemmoryLeakObject = CreateObject("System.Collections.Hashtable")
End Sub
Public Sub InsertDataToHash(ByRef KeyValue As String, ByRef DataValue As String)
If Not MemmoryLeakObject.ContainsKey(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
End Sub
Private Sub Class_Terminate()
Debug.Print "Child using System.Collections.Hashtable terminated"
Set MemmoryLeakObject = Nothing
End Sub
Statistics:
TEST: (Chronologically ordered)
1.1 Excel starting memory: 25.324 kb approximately
Max memory usage after hash (500.000 records) 84.352 kb approximately
Memory released: 0 %
1.2 max memory usages after 2nd consequtive hash usage 81.616 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.3 max memory usages after 3rd consequtive hash usage 80.000 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.4 Running the dictionary procedure after any of the hash runs will start from the already allocated memory
In this case from 80000 kb to 147000 kb
Close excel, free up memory and restart excel
2.1 Excel starting memory: 25.324 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 91,9%
2.2 Excel starting memory 2nd consequtive dict run: 27.552 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 99,4%
2.3 Excel starting memory 3rd consequtive dict run: 27.712 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released:

Hi Cor,
Thank you for going through my post and took the time to reply :) Most apreciated. The issue I am facing is that the memory is not reallocated when using mixed object types and is not behaving the same. I not understand that .net versus the older methods
use memory allocation differently and perhaps using the .net dictionary object (in stead of the scripting.dictionary) may lead to similar behaviour. {Curious to find that out -> put to the to do list of interesting thingies to explore}
I agree that allocated memory is not a bad thing as the blocks are already assigned to the program and therefore should be reallocated with more performance. However the dictionary object versus hashtable perform almost identical (and sometimes even favor
the dictionary object)
The hashtable is clearly the winner when dealing with small sets of data.
The issue arises when I am using the hash table in conjunction with another type, for example a dictionary, I see that the dictionary object's memory is stacked on top of the claimed memory space of the hashtable. It appears that .net memory allocation and
reuse is for .net references only. :) (Or so it seems)
In another example I got with the similar setup, I see that the total used memory is never released or reclaimed and leakage of around 20% allocated memory remains to eventually crash the system with the out of memory message. (This is when another class
calls the parent class that instantiates the child class but thats not the point of the question at hand)
This leakage drove me to investigate and create the example of this post in the first place. For the solution with the class -> parent class -> child class memory leak I switched all to dictionaries and no leakage occurs anymore but nevertheless thought
it may be good to share / ask if anyone else knows more :D (Never to old to learn something new)

Strange screen display

Strange screen and system freezes overnight - new iMac 27" with Lion
Twice now have found the following on screen in morning. System also unresponsive when this happens and requires powering down and restarting. Otherwise system working fine.
These are two pics of same screen taken with a camera (first one showing room reflection)
Anyone have any idea of what this is?
Tks,
Kokamow

It looks like you have a faulty USB device, probably a hard drive, which might account for some of your issues, but it doesn't explain the display.
Please read this whole message before doing anything.
This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
Third-party system modifications are a common cause of usability problems. By a “system modification,” I mean software that affects the operation of other software -- potentially for the worse. The following procedure will help identify which such modifications you've installed. Don’t be alarmed by the complexity of these instructions -- they’re easy to carry out and won’t change anything on your Mac.
These steps are to be taken while booted in “normal” mode, not in safe mode. If you’re now running in safe mode, reboot as usual before continuing.
Below are several lines of text in monospaced type, which are UNIX shell commands. They’re harmless, but they must be entered exactly as given in order to work. If you have doubts about the safety of running these commands, search this site for other discussions in which they’ve been used without any report of ill effects.
Some of the commands will line-wrap or scroll in your browser, but each one is really just a single line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, and you can then either copy or drag it. The headings “Step 1” and so on are not part of the commands.
Note: If you have more than one user account, Step 2 must be taken as an administrator. Ordinarily that would be the user created automatically when you booted the system for the first time. The other steps should be taken as the user who has the problem, if different. Most personal Macs have only one user, and in that case this paragraph doesn’t apply.
To begin, launch the Terminal application; e.g., by entering the first few letters of its name in a Spotlight search. A text window will open with a line already in it, ending either in a dollar sign (“$”) or a percent sign (“%”). If you get the percent sign, enter “sh” (without the quotes) and press return. You should then get a new line ending in a dollar sign.
Step 1
Copy or drag -- do not type -- the line below into the Terminal window, then press return:
kextstat -kl | awk '!/com\.apple/ {print $6 $7}'
Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.)
Step 2
Repeat with this line:
sudo launchctl list | sed 1d | awk '!/0x|com\.apple/ {print $3}'
This time, you'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.
Step 3
launchctl list | sed 1d | awk '!/0x|com\.apple/ {print $3}'
Step 4
ls -1A /e*/mach* {,/}L*/{Ad,Compon,Ex,Fram,In,Keyb,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Sta}* L*/Fonts 2> /dev/null
Important: If you synchronize with a MobileMe account, your me.com email address may appear in the output of the above command. If so, change it to something like “[email protected]” before posting.
Step 5
osascript -e 'tell application "System Events" to get the name of every login item'
Remember, steps 1-5 are all drag-and-drop or copy-and-paste, whichever you prefer -- no typing, except your password.
You can then quit Terminal.

Tiger update 2008-004 screwed up iMac G5 screen resolution/desktop

I have an iMac G5. Installed the Tiger 2008-004 update (and Safari update). When the iMac boots up the screen resolution/desktop gets enlarged just as the spotlight icon appears. As I move the mouse around the screen the desktop moves with it. The desktop is about 5%-10% larger than the standard size. Tried display preferences with no effect. Zapped PRAM. Re-installed updates individually,nothing works.Help!

Hi,
You probably have 'Zoom' enabled in the Universal Access preferences. Have a play around in there to find the setting to turn it off (sorry for the vague directions but I'm on a Linux machine at the moment )

Strange repaint behaviour with JList & Keyboard actions

Hi everyone,
This is my first post to the forum. You guys have been a great help in the past and I hope to contribute more in the future.
Anyways, I've encountered some strange repainting behaviour with a JDialog that uses a JList and a JButton. The dialog is fairly straight-forward and basically this is how it works (like an open file dialog - yes I'm implementing my own filechooser of sorts):
* JList lists a number of simple items that the user can select from.
* Once a selection is made, an Open button (JButton) is enabled.
* <ENTER> key is registered (using registerKeyboardAction()) with a JPanel which is used as the main content pane in the dialog.
* The user can either click on the Open Button or hit the <ENTER> key which then closes the dialog and runs whatever logic that needs to.
Now, the repaint problem comes in when:
1. User selects an item.
2. User hits the <ENTER> button
3. Dialog closes
4. User brings the dialog back up. This entails reloading the list by removing all elements from the list and adding new ones back in.
5. Now... if the user uses the mouse to select an item lower in the list than what was done in step #1, the selection is made, but the JList doesn't repaint to show that the new selection was made.
I didn't include a code sample because the dialog setup is totally straight-forward and I'm not doing anything trick (I've been doing this kind of thing for years now).
If I remove the key registration for the <ENTER> key from the dialog, this problem NEVER happens. Has anyone seen anything like this? It's a minor problem since my workaround is to use a ListSelectionListener which manually calls repaint() on the JList inside the valueChanged() method.
Just curious,
Huy

Oh, my bad. I'm actually using a JToggleButton and not a JButton, so the getRootPane().setDefaultButton() doesn't apply because it only takes JButton as an input param. I wonder why it wasn't implemented to take AbstractButton. hmmm.

Strange layout behaviour with TilePane

here is the demo
1.rootLayout have 2 child,controlbox and contentLayout
2.3 button on controlbox
3.contentLayout will add content,when press deffrent button on controlbox
4.watch button "Add TilePane" , strange layout behaviour , what is the matter?
layout picture
|--------------------------------|
|           |                    |
|           |                    |
|           |                    |
|           |                    |
|controlbox | contentLayout     |
| (VBox)    |   (StackPane)      |
|           |                    |
|           |                    |
|           |                    |
|           |                    |
|--------------------------------|
                                        the code
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.TilePane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class testTilePaneLayout extends Application {
     StackPane contentLayout = new StackPane();
     //add content with 2 Button
     public void addContent(){
          VBox vbox = new VBox();
          contentLayout.getChildren().clear();
          contentLayout.getChildren().add(vbox);
          StackPane.setAlignment(vbox,Pos.CENTER);
          Button btn = new Button("Button1");
          Button btn2= new Button("Button2");
          vbox.getChildren().add(btn);
          vbox.getChildren().add(btn2);
     //add content with 2 Button & 1 ListView
     public void addListViewContent(){
          VBox vbox = new VBox();
          contentLayout.getChildren().clear();
          contentLayout.getChildren().add(vbox);
          StackPane.setAlignment(vbox,Pos.CENTER);
          Button btn = new Button("Button1");
          Button btn2= new Button("Button2");
          vbox.getChildren().add(btn);
          vbox.getChildren().add(btn2);
          @SuppressWarnings("rawtypes")
          ListView listView = new ListView();
          vbox.getChildren().add(listView);
     //add content with 2 Button & 1 TilePane
     public void addTilePaneContent(){
          VBox vbox = new VBox();
          contentLayout.getChildren().clear();
          contentLayout.getChildren().add(vbox);
          StackPane.setAlignment(vbox,Pos.CENTER);
          Button btn = new Button("Button1");
          Button btn2= new Button("Button2");
          vbox.getChildren().add(btn);
          vbox.getChildren().add(btn2);
          TilePane tilePane = new TilePane();
          tilePane.setMaxSize(100,100);
          Label lbl = new Label("Label on TilePane");
          tilePane.getChildren().add(lbl);
          vbox.getChildren().add(tilePane);
     public void start(Stage stage) {
          stage.setResizable(false);
          stage.centerOnScreen();
          Group root = new Group();
          Scene scene = new Scene(root,800,600);
          stage.setScene(scene);
          //root Layout = StackPane
          StackPane rootLayout = new StackPane();
          root.getChildren().add(rootLayout);
          rootLayout.setMinSize(800,600);
          rootLayout.setMaxSize(800,600);
          //content StackPane
          rootLayout.getChildren().add(contentLayout);
          contentLayout.setMinSize(100, 100);
          contentLayout.setMaxSize(200, 200);
          StackPane.setAlignment(contentLayout,Pos.CENTER);
          //control VBox
          VBox controlBox = new VBox();
          rootLayout.getChildren().add(controlBox);
          controlBox.setMaxSize(100, 200);
          StackPane.setAlignment(controlBox,Pos.CENTER_LEFT);
          //3 control button
          Button btn1 = new Button("Add button");
          Button btn2= new Button("Add Listview");
          Button btn3= new Button("Add TilePane");
          controlBox.getChildren().add(btn1);
          controlBox.getChildren().add(btn2);
          controlBox.getChildren().add(btn3);
          btn1.setOnMousePressed(new EventHandler<MouseEvent>() {
               @Override
               public void handle(MouseEvent arg0) {
                    addContent();
          btn2.setOnMousePressed(new EventHandler<MouseEvent>() {
               @Override
               public void handle(MouseEvent arg0) {
                    addListViewContent();
          btn3.setOnMousePressed(new EventHandler<MouseEvent>() {
               @Override
               public void handle(MouseEvent arg0) {
                    addTilePaneContent();
          stage.show();
     public static void main(String[] args) {
          Application.launch(args);
}Edited by: noregister on Oct 4, 2011 11:30 AM
Edited by: noregister on Oct 4, 2011 11:31 AM

Oh, my bad. I'm actually using a JToggleButton and not a JButton, so the getRootPane().setDefaultButton() doesn't apply because it only takes JButton as an input param. I wonder why it wasn't implemented to take AbstractButton. hmmm.

Strange JTable behaviour - everything is highlighted

Hello all,
im experiencing some strange JTable behaviour, and im not so sure why. When i run my program, the JTable appears, but all the cells are highlighted in advance. Also, i can now only select one cell at a time. I have set myTable.setSelectionModeListSelectionModel.SINGLE_INTERVAL_SELECTION); myTable.setCellSelectionEnabled(true);and my renderer code is below. I call the renderer by using the setDefaultRenderer method with(Object.class,myRenderer).
I have also changed isCellEditable to return true. If i dont use Object.class, and try to use my own custom class, the JTable is not all highlighted, but it doesnt seem to use myRenderer, and when i click on the header of Column A, all cells from column B and beyond become highlight, which is not normal behaviour. I thought the colum you selected should be highlighted.
Sorry for the long post, i hope the above makes sense...this is really quite bizzare, and im not so sure why this is happening. Thanks for any advice you can give, regards, Rupz
import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.border.*;
import java.awt.Component;
import java.awt.Color;
import java.awt.Rectangle;
import java.util.*;
import java.awt.*;
public class MyTableCellRenderer extends DefaultTableCellRenderer{
     private Font cellFont;
     private LineBorder selectBorder;
    private EmptyBorder emptyBorder;
     public MyTableCellRenderer() {
          super();
          setOpaque(true);
          emptyBorder = new EmptyBorder(1, 2, 1, 2);
          cellFont = new Font("Times", Font.PLAIN, 10);
          setFont(cellFont);
          selectBorder = new LineBorder(Color.red);
     private boolean isHeaderCell(int row, int column){return column == 0;}
     public Component getTableCellRendererComponent (JTable myTable, Object value, boolean isSelected, boolean hasFocus, int row, int column){
          //super.getTableCellRendererComponent(myTable, value, isSelected, hasFocus,row, column);
          if (isSelected){
               super.setForeground(myTable.getSelectionForeground());
               super.setBackground(myTable.getSelectionBackground());
               setBorder(selectBorder);
          else{
               super.setForeground(myTable.getSelectionForeground());
               super.setBackground(myTable.getSelectionBackground());
               setBorder(emptyBorder);
     if (hasFocus) {
          setBorder(selectBorder);
          if (myTable.isCellEditable(row,column)) {
               super.setForeground(UIManager.getColor("Table.focusCellForeground"));
               super.setBackground(UIManager.getColor("Table.focusCellBackground"));
     else {setBorder(noFocusBorder);}
     setValue(value, isSelected, hasFocus, row, column);
//      Color bDis = getBackground();
//      boolean colourEquals = (bDis != null) && (bDis.equals(myTable.getBackground()) ) & myTable.isOpaque();
//      setOpaque (!colourEquals);
     return this;
     public void setValue (Object value, boolean hasFocus, boolean isSelected, int row, int column){
          if (value instanceof myCell){
               myCell foo = (myCell)value;
               Object data = foo.getValue(row,column);
               if (isHeaderCell(row, column)) {
                //label cells are center aligned
                    setHorizontalAlignment(JTextField.CENTER);
                   }else {
                          if (data instanceof Number) {
                              //numbers are right justified
                        setHorizontalAlignment(JTextField.RIGHT);
                          }else {
                              //everything else is left justified
                        setHorizontalAlignment(JTextField.LEFT);
                      //value to display in table
                   setText((data == null) ? "" : data.toString());
           else {
                      //not cell object so render with toString of that object
                      setText((value == null) ? "" : value.toString());

Hi VV!
thanks for the reply - now the table isnt all highlight when loaded, but as for cell celection..thats a different matter. I did have myTable.setCellSelectionEnabled(true); but no, the cell behaviour is really, eally weird, quite hard to explain, but here goes.
If i try to select cell D1 and D2 - D1 is selected, D2, E2,F2 and so on become selected. If i try to add D3 to the mix, the entire row 3 is selected, and as soon as i let go of the mouse button, the entire table except row 1 gets selected. really really weird. Below is my tableModel and what i do to the table. Thanks for your help,
regards
Rupz
myTable.setModel(new myTableModel(this,40,40));
     // Create a row-header to display row numbers.
     // This row-header is made of labels whose Borders,
     // Foregrounds, Backgrounds, and Fonts must be
     // the one used for the table column headers.
     // Also ensure that the row-header labels and the table
     // rows have the same height.
     numRows = myTable.getColumnCount();
     numCols = myTable.getRowCount();
     TableColumn       aColumn   = myTable.getColumnModel().getColumn(0);
     TableCellRenderer aRenderer = myTable.getTableHeader().getDefaultRenderer();
     Component aComponent = aRenderer.getTableCellRendererComponent(myTable, aColumn.getHeaderValue(), false, false, -1, 0);
     Font aFont       = aComponent.getFont();
     Color aBackground = aComponent.getBackground();
     Color aForeground = aComponent.getForeground();
     Border      border = (Border)UIManager.getDefaults().get("TableHeader.cellBorder");
     FontMetrics metrics = getFontMetrics(cellFont);
      * Creating a panel to be used as the row header.
      * Since I'm not using any LayoutManager,
      * a call to setPreferredSize().
     JPanel pnl = new JPanel((LayoutManager)null);
     Dimension dim = new Dimension( 40, rowHeight*numRows);
     pnl.setPreferredSize(dim);
     // Adding the row header labels
     dim.height = rowHeight;
     for (int ii=0; ii<numRows; ii++) {
       JLabel lbl = new JLabel(Integer.toString(ii+1), SwingConstants.CENTER);
       lbl.setFont(aFont);
       lbl.setBackground(aBackground);
       lbl.setForeground(aForeground);
       lbl.setBorder(border);
       lbl.setBounds(0, ii*dim.height, dim.width, dim.height);
       pnl.add(lbl);
     JViewport vp = new JViewport();
     dim.height = rowHeight*numRows;
     vp.setViewSize(dim);
     vp.setView(pnl);
     // Set resize policy and make sure
     // the table's size is tailored
     // as soon as it gets drawn.
     myTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     Dimension dimScpViewport = myTable.getPreferredScrollableViewportSize();
     if (numRows>30) dimScpViewport.height = 30*rowHeight;
     else           dimScpViewport.height = numRows*rowHeight;
     if (numCols>15)
       dimScpViewport.width = 15*myTable.getColumnModel().getTotalColumnWidth()/numCols;
     else
       dimScpViewport.width = myTable.getColumnModel().getTotalColumnWidth();
     myTable.setPreferredScrollableViewportSize(dimScpViewport);
     myTable.repaint();
And the table model
public class myTableModel extends DefaultTableModel {
     private MySpread mySpreadsheet;
     public myTableModel (MySpread aSpreadsheet){
          super();
          mySpreadsheet = aSpreadsheet;
     public myTableModel (MySpread aSpreadsheet, int rows,int cols){
          super(rows,cols);
//                for(int x = 0; x < rows; x++) {
//                      myCell temp = new myCell(new Integer(x+1));
//                  super.setValueAt(temp, x, 0);
        for(int x =0 ; x < rows; x++)
         for (int y = 0; y < cols; y++)
          // we initialize it here
          super.setValueAt(new myCell(rows,cols,("")),x,y);
     mySpreadsheet = aSpreadsheet;
     public boolean isCellEditable(int row, int column) {return true;}

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