been trying this for a while now and can't seem to get it to work. I wrote a little GUI app that uses the OS's default Look And Feel. While I wrote it on linux, it is mainly intended to be used on Windows. The JSliders under linux are fine by me, but on windows the thumbs(sliders? I don't know the right word) become very narrow, and they stop displaying the value above the thumb, too. I thought I could get around this problem with something like this:
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
UIManager.getLookAndFeelDefaults().put("Slider.thumbWidth", 20);
But, obviously, it doesn't work. How should I do this? seems like it should be a trivial thing, and I already spent more time on it than I'll ever want to admit.
thanks a lot
Not all LAFs will use the UIManager properties.
I'm not aware of the "thumbWidth" property. Maybe you meant to use the "trackWidth"?
Here is a complete list of the UIManager Defaults.
Related
My machine seems to be experiencing some weird issues with java swing.
This sort of thing happens with other programs as well but the corruption goes away with scrolling or highlighting the text. What could be causing this and why doesn't java go the same? All the characters seem to be cached so that when a character gets corrupted, all of the characters of the same type have the same corruption (not true of anything but java swing).
I have been googling around for this sort of issue but most of them only suggest issues with graphics drivers and settings for windows... (I am running kubuntu)
Side note: Sorry if this doesn't belong here. Didn't really know where else to ask.
Among the many possible causes,
Verify that all correctly synchronized Java Swing programs using standard font families with the default Look & Feel exhibit this behavior; if not, it may very well be a driver problem.
Investigate whether the Ubuntu video driver permits alterations similar to the one required in this Windows case.
Try a different window manager.
Try a different Look & Feel.
In my Java application I have a window which holds a JTextArea within a JScrollPane with scrollbars policies set to AS_NEEDED.
As I run my application I see that JTextArea this way:
Why am I seeing the scrollbars with that cutaway knob (which doesn't reflect a "standard" representation like this)?
The Layout for the frame is GridBagLayout, and I'm on Mac OS X 10.8.2, should that matter.
This is based on the Look and Feel your app is using, and the limitations of Java's integration with the native OS layout components. The one in your screenshot looks like Nimbus.
Swing applications always custom-render the look and feel, and don't do a very good job of using the native OS widgets everywhere. The result is that you get weird looks that might be consistent the OS only some of the time, or only with certain layout components.
Welcome to developing cross-platform desktop apps in Java. :(
To attempt to get the system look and feel when your application starts you can do this:
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassname());
} catch (Exception e) {
// Handle exception
}
This will set the look and feel to that of the system regardless of what you run it on.
And as mentioned, the default look and feel for your application appears to be Nimbus and not OSX's Aqua, which again can be fixed with he above snippet and you could (should you care to) offer a UI option to the user to change the look and feel of the application to whatever they chose.
You are with Nimbus LookAndFeel
http://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/nimbus.html
I have a swing application. Below is a small screenshot.
OS: Win 7
What is irritating is the theme. I have tried several other screens but they all have such appearance. Eclipse and Netbeans for example have a much better UI. The FileChooser and Frame is general is much pleasing. How do I have such a theme.
Thanks.
Change the look and feel to the Windows one before creating anything UI-related in your program:
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
Looks like you are using the Metal Look and Feel. Try using some other look and feel that might interest you.
Refer http://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html, for more information.
This will give you everything you want to know
http://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
UIManager.getSystemLookAndFeelClassName() will give you the most appropriate for the OS it's running on
there is many look and feels packages like :
1)JTattoo
2)BlueLight
3)joxy
4)Nimrod
5)Oyoaha
6)TinyLaf
....etc
you have to read about previous types
Is it possible in Delphi to keep a window on top of all other windows? For example when you have an error message in your application, let's say you want to keep the window on top and make sure the user has to click something before he can do anything else. And I really mean anything, like clicking another program in the background. And how about in Java?
No. Raymond Chen of Microsoft has a great article about why not here. The gist of it is that no matter how hard you try to keep your window on top, someone else can always come along and do the same thing.
You could do this in the old days. It was called a system modal dialog and you used the now obsolete SetSysModalWindow() function.
They were utterly repugnant and so sense and order was restored when Windows NT based versions of Windows took over.
In Delphi you can do FormStyle:=fsStayOnTop;. This will put you in front of all normal windows.
But if there are other windows which have that style set too(such as the task-bar) those might be on in front of yours. In particular among those windows the one that has focus is has the highest priority.
You can try to ensure that your window always has focus, but that's rarely a good idea. And you will incur the wraith of Raymond.
You can also use a layered window. I think those are in front of normal always-on-top windows. But this has severe side effects and is most likely not the correct choice for you.
I extend org.eclipse.swt.widgets.Composite and create many widgets on it, (labels, table, text etc). The problem I am facing is that the labels' text is getting truncated on linux while it appears fine on windows. When I change the linux's font to gothic the truncation is little less but still there. Is there way to homogenize the windows and linux display. What could be the best font to use in linux in such a case.
More likely it is related to this eclipse bug which I just lobbied to have re-opened: https://bugs.eclipse.org/bugs/show_bug.cgi?id=151322
It sounds like you are using absolute positioning instead of dynamic layouts. (If this isn't the case, perhaps you could post code demonstrating the problem). Using a dynamic layout should ensure that controls are resized to accommodate their contents. (They're also great if you ever translate a product, because then you don't have to rejig every dialog for every language.)
To complete McDowel's answer, there is also a bug related to the way Linux check for wrapping label:
It is fixed since 3.4M7.
Even though it may not be related to your case, it would be useful to know which version of eclipse you are using and if you can reproduce your bug with the latest ones (like a 3.5M6)