CoolBar (java SWT WindowBuilder) Composite doesn't appear in Application - eclipse

Question

I have a problem when I try to use a coolBar in a composite and then I embed this composite in an application. The coolBar simply doesn't appear. This problem doesn't occours with another tools, like toolBar and other composites. What can I doing wrong or forgetting?
Before following the code, I refer my system:
Win7
Eclipse:Version: Indigo Service Release 2 Build id: 20120216-1857
Google WindowBuilder 1.5.0 Google
Plugin 3.1.0
SWT Designer 1.5.0
Google Web Toolkit 2.4.0
Composite code:
package xx.xxx.xx.pcommJavaGUI.composites;
import org.eclipse.swt.widgets.Composite;
public class TestComposite extends Composite {
public TestComposite(Composite parent, int style) {
super(parent, style);
setLayout(new GridLayout(1, false));
CoolBar coolBar = new CoolBar(this, SWT.FLAT);
CoolItem coolItem = new CoolItem(coolBar, SWT.NONE);
Button btnTest = new Button(coolBar, SWT.NONE);
coolItem.setControl(btnTest);
btnTest.setText("Test");
Tree tree = new Tree(this, SWT.BORDER);
tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
}
#Override
protected void checkSubclass() {
// Disable the check that prevents subclassing of SWT components
}
}
And the application Window code:
package xx.xxx.xx.pcommJavaGUI.composites;
import org.eclipse.swt.SWT;
public class TestApplication {
protected Shell shell;
public static void main(String[] args) {
try {
TestApplication window = new TestApplication();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
protected void createContents() {
shell = new Shell();
shell.setSize(450, 300);
shell.setText("SWT Application");
shell.setLayout(new GridLayout(1, false));
TestComposite tc = new TestComposite(shell, SWT.NONE);
GridData gd_tc = new GridData(SWT.FILL, SWT.FILL, false, false, 1, 1);
tc.setLayoutData(gd_tc);
}
}
Thanks for helping.

Answer 1

You have to set the size of CoolItem manually.
First of all pack(); your Button to set it to it's default size.
Afterwards set the size of the CoolItem to the size of the Button.
The Button:
Button btnTest = new Button(coolBar, SWT.NONE);
coolItem.setControl(btnTest);
btnTest.setText("Test");
// If you do not call this, btnTest.getSize() will give you x=0,y=0.
btnTest.pack();
Set the size of CoolItem:
Point size = btnTest.getSize();
coolItem.setControl(btnTest);
coolItem.setSize(coolItem.computeSize(size.x, size.y));
Links:
CoolBar Examples
API: Control.pack();

Answer 2

It might be just because you aren't setting layout data for the coolbar. See this article to understand how layouts work.