SWT Threads

I am having problems with SWT threads. I have a method that takes long to complete and if its in the event handler it freezes the GUI.

I changed the code so that the event handler runs a thread. I can get the thread to make changes to the GUI. I can get the thread to perform set changes to the GUI. But I cant create a thread that gets info from the GUI. i.e I have a form with many text boxes that facilitate user input. The input must be used when the user presses a button. i.e The user inputs a username and password and then presses the submit button. If I try txtPassword.getText() in my thread then I get this error:

Exception in thread "Thread-0" org.eclipse.swt.SWTException: Invalid thread access

If I hard code the user name and password in my code then it runs perfectly

Please supply me with some simple code snippets of how to get the threads working. A basic way of setting values and a basic way of reading values.

Thanks
Greg

Have you tried creating a value object to hold the content of the form fields and passing that to the threaded object constructor? That would be similar to the java.lang.Thread examples in the API.

Try the following code for update

final String updateInfo = " put updated info";
Runnable r = new Runnable(){
public void run(){
aText.setText(updateInfo);
}
};

display.asyncExec(r);