org.eclipse.swt.widgets
Class MessageBox

java.lang.Object
  org.eclipse.swt.widgets.Dialog
      org.eclipse.swt.widgets.MessageBox

public class MessageBox

extends Dialog

Instances of this class are used to inform or warn the user.

Styles:

ICON_ERROR, ICON_INFORMATION, ICON_QUESTION, ICON_WARNING, ICON_WORKING

OK, OK | CANCEL

YES | NO, YES | NO | CANCEL

RETRY | CANCEL

ABORT | RETRY | IGNORE

Events:

(none)

Note: Only one of the styles ICON_ERROR, ICON_INFORMATION, ICON_QUESTION, ICON_WARNING and ICON_WORKING may be specified.

IMPORTANT: This class is intended to be subclassed only within the SWT implementation.

Since:

1.2

Constructor Summary

MessageBox(Shell parent)
Constructs a new instance of this class given only its parent.

MessageBox(Shell parent, int style)
Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

String	getMessage() Returns the dialog's message, or an empty string if it does not have one.
int	open() Makes the dialog visible and brings it to the front of the display.
void	setMessage(String string) Sets the dialog's message, which is a description of the purpose for which it was opened.

Methods inherited from class org.eclipse.swt.widgets.Dialog

checkSubclass, getParent, getStyle, getText, setText

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessageBox

public MessageBox(Shell parent)

Constructs a new instance of this class given only its parent.

Parameters:

parent - a shell which will be the parent of the new instance

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

MessageBox

public MessageBox(Shell parent,
                  int style)

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

Parameters:

parent - a shell which will be the parent of the new instance

style - the style of dialog to construct

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

Method Detail

getMessage

public String getMessage()

Returns the dialog's message, or an empty string if it does not have one. The message is a description of the purpose for which the dialog was opened. This message will be visible in the dialog while it is open.

Returns:

the message

setMessage

public void setMessage(String string)

Sets the dialog's message, which is a description of the purpose for which it was opened. This message will be visible on the dialog while it is open.

Parameters:

string - the message

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string is null

open

public int open()

Makes the dialog visible and brings it to the front of the display.

Returns:

the ID of the button that was selected to dismiss the message box (e.g. SWT.OK, SWT.CANCEL, etc.)

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the dialog has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog