We are using a the following class to show a progress-bar in our Java application: TextProgressBar
Unfortunately we are having some problems with flickering when using that (Win 7, Java 7). Do you have any tips on how we can avoid that? Can we somehow repaint it less frequently, use double-buffering or something else? Any tips are greatly appreciated!
First, try passing SWT.DOUBLE_BUFFERED in for the style parameter on construction. If that fails to improve the situation, move up the parent chain and add SWT.DOUBLE_BUFFERED to their constructor call instead.
If you don't have control over the parent, then you'll likely need to wrap your control in another Composite that has this flag enabled.
try SWT.NO_BACKGROUND first, and if not use SWT.DOUBLE_BUFFERED.
Do not use both at the same time, because there is no point.
See the discussion
Disclaimer: I know that the question asks specifically about the TextProgressBar. However, I believe that many views of this question are not limited to this widget.
I had a problem with the flickering of the Text widget, which I could not resolve neither by using the SWT.DOUBLE_BUFFERED style, nor by wrapping it with the Composite, nor by applying any combination of them.
Finally, I was able to resolve this problem by simply changing the widget type from Text to StyledText. There is no flicker even without the SWT.DOUBLE_BUFFERED style and without the Composite wrapper.
Hope this will help someone who was attracted by the broad title of this question.
you can try delaying the time with thread.sleep(). It worked for me when i had the same problem when working with jTables
Related
Any parameter to set A JFrame's border/frame thickness or existence and still keep the title bar intact? I want an almost borderless frame with a thin blue line like this one and not like the default border.
If JFrame isn't the way to go, what is a good way to achieve that? (preferably that is compatible with WindowBuilder but that's probably asking for too much).
A search barely yields any mention and related questions on SOF don't seem to have answers so I thought I'd try to get a good answer once and for all.
JFrame#setUndecorated
Disables or enables decorations for this frame.
This method can only be called while the frame is not displayable. To make this frame decorated, it must be opaque and have the default shape, otherwise the IllegalComponentStateException will be thrown. Refer to Window.setShape(java.awt.Shape), Window.setOpacity(float) and Window.setBackground(java.awt.Color) for details
Please, consult the available documentation
Please note, you will become responsible for providing the title bar yourself, should you want it
A search barely yields any mention and related questions on SOF don't seem to have answers
Google provides a number of promising hits
I ended up switching to NetBeans and learning some Photoshop basics which you'll need thanks to a comment by #MadProgrammer
writing your own look and feel delegate
and ended up exactly with what you mentioned #theProgrammer101
You can make a JButton, and when it is clicked, call System.exit(0) , which will terminate the program
You can create a similar button for minimize action as well as your own drop down menus that are totally custom made and you won't need to rely on the default JFrmae window in case that bothers you too (I found it horrid).
check out this link for a good NetBeans tutorial with an nice example of writing your own look and feel delegate and this link for a great tutorial on getting started with Photoshop which is critical to GUI creation.
Thought i'd round up some of my research for anyone else who's just getting into GUI's.
I will explain my question clearly.
I need to zoom in/zoom out the world map.
When I click on the particular country in map, control should redirected to new page with respective the country.
I dont have any idea about this in java. Please explain the steps to acheive the above task.
As the question is quite general, here is a general answer: Zooming often means, that you want to display a certain percentage of somethin, and not the whole, where your size of the displayed will not change.
But in your case it seems more like a "find a mouse click in a polygon" thing. So you have to add a selection/click listener to whatever widgets you use (Swt? swing? ....?) where you change what your program renders.
It sounds like you may be trying to reinvent the wheel. Google etc have already solved this problem rather well. It might be better to incorporate an existing solution into your application. Have a look at GoogleEarth inside Java Swing.
This may be a silly question I don't know.
Is there a way to remove the highlighter to represent focus in a Java GUI?
For example when you click on a button the text will have a slight rectangle around the text.
Thank you
I believe you want to remove the set focusable attribute from your items
using setFocusable(false)
http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html
That feature is there for a reason because it gives user feedback about which component currently has focus. But if you really must turn it off then you can use:
button.setFocusPainted( false );
As far as I knew one of the selling points of swing when it first appeared was that any GUI element could be completely customised. This might help you out: Custom Swing Controls
Is it possible to overlay multiple JSliders so I can see the "thumbs" on both (I've tried disabling the painting of the track and setting opacity to false but one still hides the other)? Basically I'd like to create a component that allows the user to define a range (and I didn't really want to write a custom one since it has most of the attributes of a slider). If there is another way I could do that with a slider, that would work too.
thanks,
Jeff
Ah, I found it (i must not have been seraching on the right terms). Swing labs as a JXMultiThumbSlider that I think will do the trick.
http://swinglabs.org/hudson/job/SwingX%20Weekly%20Build/javadoc/org/jdesktop/swingx/JXMultiThumbSlider.html
I recently had the same problem, I wanted a slider with two thumbs. I didn't get into it too much, and what I ended up doing to get the range is simply putting two sliders and in the "onSliderChange" event listener prevented one beeing smaller than the other and the other bigger than the one. I don't beleive Swing has a two-thumb-Slider, although it might be a cool new feature to add, so I think this is your best bet.
JIDE has a RangeSlider with 2 thumbs (and a nice extra one on top to move both thumbs at once (e.g. drag the range around) in their open source common layer: http://www.jidesoft.com/products/oss.htm
Is it possible to make a progressbar in Java like displayed on this page?
Image.So, not the default progressbar "filling-way".
If so, how?
Thanks
I found it self. Just call setIndeterminate(true);!!
I found it on java2s
You'd have to do some wicked overriding of either the paint or paintComponent methods (I forget which one exactly), but yeah it's possible. The best way is to look at existing tutorials on custom swing components: http://today.java.net/pub/a/today/2007/02/22/how-to-write-custom-swing-component.html
They're pretty old, but still applicable.
I think the easiest way would be to write your own custom component. The alternative would be a custom look and feel (there's a lot of work involved in that), but it shouldn't be too difficult to write a custom component with your own indeterminate animation very similar to what you see there.