Hi Rafał,
Without actually trying to run your code, I think the problem is that
you shouldn't be modifying any UI elements in a non-UI thread.
Once you call "DesktopApplicationContext.main()" it starts another
thread to run the basic event loop of your GUI application. This calls
"startup()" as one of the first things it does. But, since your "main" method
and the "startup" method are now in two different threads, it is problematic
which one runs first, and it is basically illegal to modify any UI components
in a different thread than the UI thread (for a number of reasons). So, your
call to "frame.setHeight()" in the main thread is violating this rule. If you
put the "frame.setHeight()" right after "frame = new Frame()" and before the
"frame.open" then everything should be fine. Something like this:
public void startup(Display display, Map<String, String> properties) throws
Exception {
Frame frame = new Frame();
frame.setHeight(100);
frame.open(display);
}
public static void main(String[] args) throws Exception {
DesktopApplicationContext.main(BasicTest.class, new String[0]);
// This is a non-UI thread now, so no changes to "frame" are going to
work if done here
}
Let us know if you have further problems.
~Roger Whitcomb
-----Original Message-----
From: Rafał Gierusz [mailto:[email protected]]
Sent: Tuesday, February 14, 2012 8:23 AM
To: [email protected]
Subject: 2.0.1 Resizing problem
Hi,
I have problem with resizing a Frame window, please take a look on the
code below (I tried to make it as simple as possible to show my
concerns, it's not pretty).
public class BasicTest extends Application.Adapter {
static Frame frame;
public void startup(Display display, Map<String, String> properties)
throws Exception {
frame = new Frame();
frame.open(display);
}
public static void main(String[] args) throws Exception {
DesktopApplicationContext.main(BasicTest.class, new String[0]);
Thread.sleep(2000); //to have a short while to take a look on the
displayed window
frame.setHeight(100);
}
}
When application starts we can see a main window and a very small
internal window (Frame) in it. After two seconds internal frame changes
its height to 100, I do it using frame.setHeight(100). But when you move
mouse over the main window Frame changes back it's height to the one
before we changed it to 100. Can you tell me what's wrong here?
What's more interesting, when I use setPreferredHeight instead the
Frame's height is not changed until mouse is moved, which is of course
not good too.
Regards,
Rafal
