Eclipse Plug-in Development: DefaultInformationControl Does'nt work as expected - eclipse

Question

I am writing eclipse plugin that using the texthover and override it for my own text.
I need to add an action to the hover window so I used the following function:
public IInformationControlCreator getHoverControlCreator()
This is my code:
#Override
public IInformationControlCreator getHoverControlCreator() {
return new IInformationControlCreator() {
public IInformationControl createInformationControl(Shell parent) {
Shell s=new Shell(parent,SWT.V_SCROLL | SWT.H_SCROLL);
ToolBarManager tbm = new ToolBarManager(SWT.FLAT);
NoFocusDic dic = new NoFocusDic(parent, tbm);
dic.setBackgroundColor(new Color(null,123,234,12));
ButtonAction ba=new ButtonAction();
tbm.add(ba);
tbm.update(true);
dic.setSize(300,100);
dic.setLocation(new Point(500,500));
// dic.setInformation("abc");
dic.setVisible(true);
return dic;
}
};
}
When I run this code with the setInformation line I get this window:
And when I run it without the setInformation line I get this window:
So The window I want to always get is the second one, but with text inside.
I read in eclipse site that the setVisible won't work if I try to catch the focus, but I don't think that setInformation is catching focus.
Any Ideas what to do?
package TextHoverPackage;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.text.DefaultInformationControl;
import org.eclipse.jface.text.IInformationControl;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IInformationControlExtension2;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Shell;
public class NoFocusDic extends DefaultInformationControl implements IInformationControlExtension2 {
public NoFocusDic(Shell parent, ToolBarManager toolBarManager) {
super(parent, toolBarManager);
}
public NoFocusDic(Shell parent, ToolBarManager toolBarManager, IInformationPresenter a){
super(parent, toolBarManager,a);
}
#Override
public void setInput(Object arg0) {
super.setInformation(arg0.toString());
}
}

Answer 1

DefaultInformationControl.setInformation adjusts the size of the window to fix the text that you give it. However it only does this if an IInformationPresenter has been defined.
So one option is to specify null for the IInformationPresenter in your constructor:
public NoFocusDic(Shell parent, ToolBarManager toolBarManager) {
super(parent, toolBarManager, null);
}