Basics

[avish12]

Hi, I'm new here :)
first of all, can anyone point me to a specific code examples about Listeners and Shells?

Now three questions:

1. How do I open a shell inside a shell? i.e, I have the main shell in display and now wanting to open a Message-Box-like shell, that will contain a Text to get some string...
So, I understand the creation, yet I can't find what to write as the part that makes the shell listen constantly. Meaning, what will I do that is similar to:

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

(The problem is of course that I DON'T have the "display" object, 'cause the parent here is the main shell...

2. My main shell is defined where the main function is, yet I would like to pop a MessageBox somewhere else. How can I do it when I need to know what shell am I in?

3. Assuming layoutData is of shell is defined as GridData, what determines whether information will be shown by rows or by coloumns?

Thanks in advance,
Avishay

[Fubarable]

Code tags added to make posted code retain its formatting and be more readable.

[jagadeesh]

Hi,
use your shell as parent for your Messagebox.
Example code is,

public class SWTApp {


	public SWTApp(Display display) {

	final Shell shell = new Shell(display);
	shell.setText("Center");
	shell.setSize(250, 200);
	shell.open();
	
	shell.setMinimumSize(100, 100);
	Button  button=new Button(shell,SWT.PUSH);
	button.setBounds(100, 100, 300, 150);
	button.setText("Click Me");
	button.addSelectionListener(new SelectionListener(){

		
		public void widgetDefaultSelected(SelectionEvent arg0) {
			
			
		}

		
		public void widgetSelected(SelectionEvent arg0) {
			
			MessageBox mb=new MessageBox(shell,SWT.OK|SWT.ICON_INFORMATION);
			mb.setMessage("Hello welcome");
			mb.setText("Hi");
			mb.open();
		}
		
		
	});

	while (!shell.isDisposed()) {
	if (!display.readAndDispatch()) {
	display.sleep();
	}
	}
	}
	public static void main(String[] args) {
	Display display = new Display();
	new SWTApp(display);
	display.dispose();
	}
	}