Re: [platform-swt-dev] Control.setBackground(Color)

[Randy Hudson <hudsonr@xxxxxxxxxx>]

This is a question that should be asked
on the newsgroup so that people subscribed to swt-dev don't get spammed.

You can request a repaint by calling
redraw(). However, if for some reason you decide to block the UI thread
while communicating with a server (as the snippet suggests), then the repaint
will not get dispatched until after your code finished executing.  You
could force it by calling Control.update().

Why is it called redraw when it generates
a PaintEvent?
Why do you drive on a parkway and park
in a driveway?

"Erik Poupaert" <erik.poupaert@xxxxxxxxx> Sent by: platform-swt-dev-admin@xxxxxxxxxxx 02/17/2003 02:24 PM Please respond to platform-swt-dev

To:        <platform-swt-dev@xxxxxxxxxxx>         cc:                 Subject:        [platform-swt-dev] Control.setBackground(Color)

I've run into something strange with Control.setBackground(Color). I've
got
one of these labels that should become green while the application is
communicating with the server, and turn back to blue, when the communication
is over (or red, if there was a problem).

//background is dark blue
label.setBackground(SWT.COLOR_GREEN);
communicateWithServer();
label.setBackground(SWT.COLOR_DARK_BLUE);

Now, the label never becomes green. It simply doesn't get executed. When
I
change the text of the label, however, it does get executed. So, now I've
got the following strange workaround:

//background is dark blue
label.setBackground(SWT.COLOR_GREEN);
label.setText(label.getText()); //force repaint
communicateWithServer();
label.setBackground(SWT.COLOR_DARK_BLUE);


Is there any other, more appropriate, way to force a repaint?

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