Re: [platform-swt-dev] About RowLayout (SWT3.0 vs SWT3.4)

[Steve Northover <Steve_Northover@xxxxxxxxxx>]

What's 3.0?  <g>

Between 3.0 and now, SWT layout was
fixed to handle the wrapping case.  Before that, you had to explicitly
force the wrapping by setting the width hint.  The follow code works
on 3.0 and 3.5:

import
org.eclipse.swt.SWT;
import
org.eclipse.swt.custom.CLabel;
import
org.eclipse.swt.graphics.Rectangle;
import
org.eclipse.swt.layout.GridData;
import
org.eclipse.swt.layout.GridLayout;
import
org.eclipse.swt.layout.RowLayout;
import
org.eclipse.swt.widgets.Composite;
import
org.eclipse.swt.widgets.Display;
import
org.eclipse.swt.widgets.Event;
import
org.eclipse.swt.widgets.Listener;
import
org.eclipse.swt.widgets.Shell;

public
class
RowLayoutTester {
        /**
     
   * @param
args
     
   */
        public
static
void
main(String[] args) {
         
      final
Display display = Display.getDefault();
         
      final
Shell shell = new
Shell();
         
      shell.setSize(327, 253);
         
      shell.setText("SWT
Application");
         
      shell.setLayout(new
GridLayout(1, true));
         
      final
Composite parent = new
Composite(shell, SWT.BORDER);
         
      final
GridData gridData = new
GridData(GridData.FILL_HORIZONTAL
| GridData.VERTICAL_ALIGN_BEGINNING);
         
      parent.setLayoutData(gridData);
         
      final
RowLayout layout = new
RowLayout();
         
      parent.setLayout(layout);
         
      for
(int
i = 0; i < 10; i++) {
         
              CLabel
simulatorLabel = new
CLabel(parent, SWT.WRAP);
         
              simulatorLabel.setText("Simulator"
+ i);
         
      }
         
      shell.addListener(SWT.Resize,
new
Listener () {
         
              public
void
handleEvent(Event event) {
         
               
      gridData.widthHint
= parent.getClientArea().width;
         
              }
         
      });
         
      shell.layout();
         
      shell.open();
         
      while
(!shell.isDisposed()) {
         
              if
(!display.readAndDispatch())
         
               
      display.sleep();
         
      }
         
      display.dispose();
        }
}

xuqingkang2 <xuqingkang2@xxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

02/12/2009 12:50 AM

Please respond to
"Eclipse Platform SWT component developers list."        <platform-swt-dev@xxxxxxxxxxx>

To	swt-dev <platform-swt-dev@xxxxxxxxxxx>
cc
Subject	[platform-swt-dev] About RowLayout (SWT3.0 vs SWT3.4)

Hello everybody!
I have code like following:
-------------------------------------
package basic;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class RowLayoutTester {
 /**
  * @param args
  */
 public static void main(String[] args) {
  final Display display = Display.getDefault();
  final Shell shell = new Shell();
  shell.setSize(327, 253);
  shell.setText("SWT Application");
  shell.setLayout(new GridLayout(1,true));
  Composite parent = new Composite(shell, SWT.BORDER);
  parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
  parent.setLayout(new RowLayout());
  for (int i = 0; i < 10; i++) {
   CLabel simulatorLabel = new CLabel(parent, SWT.WRAP);
   simulatorLabel.setText("Simulator" + i);
  }
  shell.layout();
  shell.open();
  while (!shell.isDisposed()) {
   if (!display.readAndDispatch())
    display.sleep();
  }
  display.dispose();
 }
} 
-------------------------------------
1,When i run this app in swt3.0(version 3.064):
--1.1,screen is shown like "RowLayout3.0.JPG"(only one row and
not wrap all the CLabel).
--1.2,and when i changing the shell's size,the screen also not wrap all
the CLabel.
2,When i run this app in swt3.4(version 3.449):
--2.1,screen is shown like "RowLayout3.4.JPG"(automatically wrap
all the CLabel in multi-row).
--2.2,when i changing the shell's size,the row will increase or decrease,and
all the CLabel will be wrapped in rows.
 
it is the SWT3.0's bug?
or
how can i do in swt3.0 for all the CLabel can be wrapped in rows.
 
Thanks in advance.
qingkang xu.


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Attachment: RowLayout3.4.JPG
Description: JPEG image

Attachment: RowLayout3.0.JPG
Description: JPEG image