I use XMonad+gnome as window Manager. I have the problem that, when I run a Java Web Start applicacion, It olways show an empty window, like the screen:
Is there something I can do to fix it?
UPDATE:
I tried simple programs from JWS Examples and it works, right. So it should be a problem of the application.
The failed aaplication is Blast2Go.
Change the name of the window manager to a known one like LG3D:
startupHook = setWMName "LG3D"
I had the exact same problem with my own Java code and using the other suggested solutions (setWMName, MToolkit, etc.) did not solve the problem with Xmonad. I must note that in other window managers (e.g. fluxbox), the app works as expected. In my case, however, I figured out the problem. If you have access to the source of the Java app, I suggest you consider the following:
If you have any JFrame or JPanel or other containers, you should explicitly define their layouts. If you set the layout to null, then the dimensions of the container must be set explicitly. Otherwise, the container won't be rendered at all. For instance, I have a JPanel that contains all my widgets. I'd rather have full control over the layout, so I set the layout to null, and then explicitly set the dimensions for the JPanel:
jContentPane.setLayout(null);
jContentPane.setPreferredSize(new Dimension(appletWidth,appletHeight+100));
Hope this helps.
Related
I'm using a JInternalFrame and I want to remove the dropdown in the upper left of the frame, as it serves no purpose (I've disabled resizeable, closable, etc.)
I don't see a property for this, and I don't want to remove the entire title bar, as the title is necessary. I've looked around online, and basically come up empty here. I'm hoping it's something simple that I've just overlooked, as this is my first time using JInternalFrame, and I'm not exactly a GUI kind of guy to begin with.
internalframe.setFrameIcon(null);
Edit: hack to remove system menu in Windows:
BasicInternalFrameUI ui = (BasicInternalFrameUI)internalFrame.getUI();
Container north = (Container)ui.getNorthPane();
north.remove(0);
north.validate();
north.repaint();
The relevant Icon in The Synth Look and Feel, among the Nimbus Defaults, appears to have this key:
InternalFrame:InternalFrameTitlePane:"InternalFrameTitlePane.menuButton".icon
You may be able to use the approach shown in A Synth Example to replace the Icon.
setFrameIcon(anyBigImageThatCantBeDisplayed);
I´ve tried null parameter and got some visual issues...
So i added a big image(no background) that was already on my resource folder and the icon was no longer displayed as the menu...
I am working on a big application with lots of components in it. I am trying to add a comboBox at one place and Container is removing that component before it is visible. I read some where that Java Swing validates and removes the component if it is aded somewhere else. How does that exactly works ?
I am sorry but I guess this problem is too abrupt and I am not able to provide any code.
P.S. checked every property of component,panel and container and there is nothing which is affecting the visibility of component.
I never see that Container is removing that component before it is visible, how and what did you debug that, are you sure that JComboBox was added to the expected and visible Container, btw there are lots of threads about How to Add/Remove JComponent(s) on Runtime here is guide from last/recent posts about that,
What you've read is that you can add a component to only one visualized container. If you add the component to multiple containers it will only be visualized in one of them. Other than that, Swing will not randomly remove components from containers, so if the first thing that I mentioned is not your issue, you've got a bug in your program, and we'll need to see code to figure out what it is. Best would be if you could create and post an SSCCE
Right now, I have a full screen application which spawns several full screen JFrames based on a configuration file (so I can never predict exactly how many frames I will have). These JFrames are in full-screen mode, like this:
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
setUndecorated(true);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(0,0,screenSize.width, screenSize.height);
The problem is, these JFrames are misbehaving in a Linux environment. I struggled a whole lot with requestFocus, requestFocusInWindow, toFront, setVisible, etc. But nothing seems to get it to work properly in Linux. The issue lies in the fact that I have several frames and I need to be able to switch between them when I click on a button (it's basically a menu).
So I'm starting to think a JFrame isn't the best object to use. Would it be easier to manager multiple frames if they were, say optionPanes? Or something similar? Whatever the solution, I need to be able to DO_NOTHING_ON_CLOSE and setUndecorated (or something similar).
Note: If you don't see a reason I need to change my JFrame and would know how I can switch focus/view easily, please let me know. This would also be an answer to my problem.
i dont see your call to set the screen to fullscreen ?
http://download.oracle.com/javase/tutorial/extra/fullscreen/exclusivemode.html
I have decided to use the cardLayout and changing my code around a little bit.
I am developing desktop GUI application using java swing. And I want to show several "subwindow" on the same window(JFrame). And I want the layout is similar to iGoogle such that user can add and remove new subwindow. To be simple, I assume all the "subwindows" have the same size and similar content(all are showing chart). By the way, the maximum number of "subwindow" would not be a huge number. I think it is less than 8.
if there is no drag and drop, can I just use grid layout to
implement it?
if there is drag and drop, what is the easy way to
do it?
Thank You very much.
FYI: iGoogle http://www.google.com.hk/ig
I don't know what iGoogle is, but it sounds like you should be using internal frames. See the section from the Swing tutorial on How to Use Internal Frames.
If all the "sub windows" will be equal size and not draggable, I'd just use a simple layout. seems like a good case to use TableLayout. In a simple case where you know the max amount of slots, you could have 8 corresponding JPanels and add them to Container using the table layout (making sure to revalidate()) as the user requests them. if a user closes one, you just remove it from the container and revalidate. Hope that helps. if you don't need docking functionality, don't even go down that road is my advice.
EDIT:
you could also still implement drag and drop by using your own mouse handlers.
I am currently writing an application where the user has, at some point, to click a button which have been generated at run time. I know how to do it when writing all my swing code from scratch, but I'd like to take advantage of Netbeans' visual editor.
The generated UI code goes into an initComponents() method I can't modify since it is regenerated automatically from the visual form.
I'd like to have a panel I place at design time using the visual editor in which I could add the buttons at run time so that they fit nicely in the layout, but I don't know how to access the panel in a convenient way. Besides, there may be another method than using a panel.
So basically :
How do I locate a Swing component at run time ?
Is there a better way of integrating components created at run time in a generated Swing UI ?
Thanks for your help.
NetBeans-generated GUI classes store all the components in private variables. You can add a method into the generated class that returns the panel, and it will remain even as you do additional design.
If you're going to use a generated UI, then it's probably best to use a JPanel within that UI to "carve out" space for your own components. Otherwise, you'll have to worry about how your components affect the layout of the components placed by the UI.
Just because you are using NetBeans generated GUI classes doesn't mean that you have to use the Group layout for the panels. I find that switching it to a BorderLayout helps especially in cases where I want to add some dynamic user interface code.
It is possible to change private to protected/public by either right clicking on a component in the GUI-Designer, choosing properties and hitting the Source-tab or right clicking on a component and choosing "Modify Source" (or something like that) and setting the appropriate access modifier.
Or just export them via a getXYZComponent() method.
Locating the component should provide as being too difficult, as you built it with the designer and thus know each component.
For example, if you had a JTabbedPane and wanted to add tabs to it when the user hits a button or something like that, you would simply issue myJTabbedPane.add(myCustomComponent); et voila, a new tab appears.
It is also possible to modify the auto-generated code and/or the code used for auto-generation by using the "Modify source" dialog mentioned above, which can be really useful.