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Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Label Text Vertical Alignment Problem
Label Text Vertical Alignment Problem [message #521615] Thu, 18 March 2010 09:37 Go to next message
Cheney  is currently offline Cheney Friend
Messages: 12
Registered: March 2010
Junior Member
This is a multi-part message in MIME format.
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Hi,

I am try to align some label text vertically. The text need to display
in different language, e.g English,Chinese,Japanese,Korean...

But the problem is that: The same sample code,in my computer 1, the text
layout is OK, but in my computer 2, the text layout is wrong,see attached.

The sample code as I used is below:

public class Snippet143 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new GridLayout(1, false));
CLabel chinese = new CLabel(shell, SWT.BORDER);
chinese.setAlignment(SWT.CENTER);
chinese.setText("中文");
chinese.setBackground(display.getSystemColor(SWT.COLOR_YELLO W));

CLabel english = new CLabel(shell, SWT.BORDER);
english.setAlignment(SWT.CENTER);
english.setText("English");
english.setBackground(display.getSystemColor(SWT.COLOR_YELLO W));

CLabel japanese = new CLabel(shell, SWT.BORDER);
japanese.setAlignment(SWT.CENTER);
japanese.setText("日本語");
japanese.setBackground(display.getSystemColor(SWT.COLOR_YELL OW));

CLabel korean = new CLabel(shell, SWT.BORDER);
korean.setAlignment(SWT.CENTER);
korean.setText("한글");
korean.setBackground(display.getSystemColor(SWT.COLOR_YELLOW ));

shell.setSize(180, 200);
shell.open();
// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}
}


I run the code base on org.eclipse.swt_3.5.1.v3555a.jar, and my two
computer is the same configuration:os.arch=amd64 os.name=Linux
os.version=2.6.25.5-1.1-default.

Dose anybody know what cause the problem?

Best Regards,
Cheney

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Re: Label Text Vertical Alignment Problem [message #522685 is a reply to message #521615] Tue, 23 March 2010 15:29 Go to previous messageGo to next message
Grant Gayed is currently offline Grant GayedFriend
Messages: 2151
Registered: July 2009
Senior Member
Hi Cheney,

I would assume that there's a different font being used in some cases
between the two machines. Try adding a listener like the one below to each
of your CLabels, and then compare the output between your two machines. Is
there a difference?

chinese.addListener(SWT.Paint, new Listener() {
public void handleEvent(Event event) {
System.out.println("----\nChinese font height: " +
event.gc.getFontMetrics().getHeight());
System.out.println("font: " +
event.gc.getFont().getFontData()[0].toString());
}
});

Grant


"Cheney Chen" <cheney_chen@i-len.com> wrote in message
news:hnss9a$n0e$1@build.eclipse.org...
> Hi,
>
> I am try to align some label text vertically. The text need to display
> in different language, e.g English,Chinese,Japanese,Korean...
>
> But the problem is that: The same sample code,in my computer 1, the text
> layout is OK, but in my computer 2, the text layout is wrong,see attached.
>
> The sample code as I used is below:
>
> public class Snippet143 {
> public static void main(String[] args) {
> Display display = new Display();
> Shell shell = new Shell(display);
> shell.setLayout(new GridLayout(1, false));
> CLabel chinese = new CLabel(shell, SWT.BORDER);
> chinese.setAlignment(SWT.CENTER);
> chinese.setText("??");
> chinese.setBackground(display.getSystemColor(SWT.COLOR_YELLO W));
>
> CLabel english = new CLabel(shell, SWT.BORDER);
> english.setAlignment(SWT.CENTER);
> english.setText("English");
> english.setBackground(display.getSystemColor(SWT.COLOR_YELLO W));
>
> CLabel japanese = new CLabel(shell, SWT.BORDER);
> japanese.setAlignment(SWT.CENTER);
> japanese.setText("???");
> japanese.setBackground(display.getSystemColor(SWT.COLOR_YELL OW));
>
> CLabel korean = new CLabel(shell, SWT.BORDER);
> korean.setAlignment(SWT.CENTER);
> korean.setText("??");
> korean.setBackground(display.getSystemColor(SWT.COLOR_YELLOW ));
>
> shell.setSize(180, 200);
> shell.open();
> // Set up the event loop.
> while (!shell.isDisposed()) {
> if (!display.readAndDispatch()) {
> // If no more entries in event queue
> display.sleep();
> }
> }
> display.dispose();
> }
> }
>
>
> I run the code base on org.eclipse.swt_3.5.1.v3555a.jar, and my two
> computer is the same configuration:os.arch=amd64 os.name=Linux
> os.version=2.6.25.5-1.1-default.
>
> Dose anybody know what cause the problem?
>
> Best Regards,
> Cheney
>


------------------------------------------------------------ ----------------
----






------------------------------------------------------------ ----------------
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Re: Label Text Vertical Alignment Problem [message #522830 is a reply to message #522685] Wed, 24 March 2010 06:14 Go to previous messageGo to next message
Cheney  is currently offline Cheney Friend
Messages: 12
Registered: March 2010
Junior Member
Hi Grant,

Yes, your are right.Previous, the two machines' font height is not the
same. Then I configurate the two machines as the same font, but the
problem is still exist.

The font in two machines is:
----
Chinese font height: 18
font: 1|Sans|10.0|0|GTK|1|

any hints?

Best Regards,
Cheney

Grant Gayed wrote:
> Hi Cheney,
>
> I would assume that there's a different font being used in some cases
> between the two machines. Try adding a listener like the one below to each
> of your CLabels, and then compare the output between your two machines. Is
> there a difference?
>
> chinese.addListener(SWT.Paint, new Listener() {
> public void handleEvent(Event event) {
> System.out.println("----\nChinese font height: " +
> event.gc.getFontMetrics().getHeight());
> System.out.println("font: " +
> event.gc.getFont().getFontData()[0].toString());
> }
> });
>
> Grant
>
Re: Label Text Vertical Alignment Problem [message #522922 is a reply to message #522830] Wed, 24 March 2010 09:32 Go to previous message
Grant Gayed is currently offline Grant GayedFriend
Messages: 2151
Registered: July 2009
Senior Member
Can you try setting the font for each CLabel to a font that definitely
contains the characters to be shown? My theory is that Sans does not
contain some of the chinese/japanese/korean characters you're using, and
different fonts are being automatically substituted on the two machines for
drawing them. This could be an swt problem (eg.- the wrong font metrics
being used when a font is substituted), but it would be helpful to know if
choosing fonts that don't require substitution will help your case.

Grant


"Cheney Chen" <cheney_chen@i-len.com> wrote in message
news:hocak2$dfu$1@build.eclipse.org...
> Hi Grant,
>
> Yes, your are right.Previous, the two machines' font height is not the
> same. Then I configurate the two machines as the same font, but the
> problem is still exist.
>
> The font in two machines is:
> ----
> Chinese font height: 18
> font: 1|Sans|10.0|0|GTK|1|
>
> any hints?
>
> Best Regards,
> Cheney
>
> Grant Gayed wrote:
> > Hi Cheney,
> >
> > I would assume that there's a different font being used in some cases
> > between the two machines. Try adding a listener like the one below to
each
> > of your CLabels, and then compare the output between your two machines.
Is
> > there a difference?
> >
> > chinese.addListener(SWT.Paint, new Listener() {
> > public void handleEvent(Event event) {
> > System.out.println("----\nChinese font height: " +
> > event.gc.getFontMetrics().getHeight());
> > System.out.println("font: " +
> > event.gc.getFont().getFontData()[0].toString());
> > }
> > });
> >
> > Grant
> >
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