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Eclipse Rich Ajax Platform
Release 1.2

org.eclipse.swt.widgets
Class Group

java.lang.Object
  extended by

org.eclipse.swt.widgets.Widget
      extended by

org.eclipse.swt.widgets.Control
          extended by

org.eclipse.swt.widgets.Scrollable
              extended by

org.eclipse.swt.widgets.Composite
                  extended by
org.eclipse.swt.widgets.Group
All Implemented Interfaces:
Adaptable

public class Group
extends Composite

Instances of this class provide an etched border with an optional title.

Shadow styles are hints and may not be honoured by the platform. To create a group with the default shadow style for the platform, do not specify a shadow style.

The various SHADOW_* styles are not yet implemented.

Styles:
SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE
Events:
(none)

Note: Only one of the above styles may be specified.

IMPORTANT: This class is not intended to be subclassed.


Note: The styles SHADOW_XXX are not yet implemented in RWT.

Since:
1.0

Constructor Summary
Group ( Composite parent, int style)
          Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.
 
Method Summary
  Point computeSize (int wHint, int hHint, boolean changed)
          Returns the preferred size of the receiver.
  Rectangle computeTrim (int x, int y, int width, int height)
          Given a desired client area for the receiver (as described by the arguments), returns the bounding rectangle which would be required to produce that client area.
  Rectangle getClientArea ()
          Returns a rectangle which describes the area of the receiver which is capable of displaying data (that is, not covered by the "trimmings").
  String getText ()
          Returns the receiver's text, which is the string that the is used as the title.
 void setText ( String text)
          Sets the receiver's text, which is the string that will be displayed as the receiver's title, to the argument, which may not be null.
 
Methods inherited from class org.eclipse.swt.widgets. Composite
changed, getAdapter, getBackgroundMode, getChildren, getLayout, getLayoutDeferred, getTabList, isLayoutDeferred, layout, layout, layout, layout, setBackgroundMode, setFocus, setLayout, setTabList
 
Methods inherited from class org.eclipse.swt.widgets. Control
addControlListener, addFocusListener, addKeyListener, addMouseListener, addTraverseListener, computeSize, forceFocus, getBackground, getBackgroundImage, getBorderWidth, getBounds, getCursor, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getParent, getShell, getSize, getToolTipText, getVisible, isEnabled, isFocusControl, isVisible, moveAbove, moveBelow, pack, pack, redraw, removeControlListener, removeFocusListener, removeKeyListener, removeMouseListener, removeTraverseListener, setBackground, setBackgroundImage, setBounds, setBounds, setCursor, setEnabled, setFont, setForeground, setLayoutData, setLocation, setLocation, setMenu, setRedraw, setSize, setSize, setToolTipText, setVisible, toControl, toControl, toDisplay, toDisplay
 
Methods inherited from class org.eclipse.swt.widgets. Widget
addDisposeListener, addListener, checkSubclass, checkWidget, dispose, getData, getData, getDisplay, getStyle, isDisposed, notifyListeners, removeDisposeListener, removeListener, setData, setData, toString
 
Methods inherited from class java.lang. Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Group

public Group(
Composite 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.

The various SHADOW_* styles are not yet implemented.

Parameters:
parent - a composite control which will be the parent of the new instance (cannot be null)
style - the style of control 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
See Also:
SWT.SHADOW_IN, SWT.SHADOW_OUT, SWT.SHADOW_NONE, Widget.checkSubclass(), Widget.getStyle()
Method Detail

setText

public void setText(
String text)
Sets the receiver's text, which is the string that will be displayed as the receiver's title, to the argument, which may not be null. The string may include the mnemonic character.

Mnemonics are indicated by an '&' that causes the next character to be the mnemonic. When the user presses a key sequence that matches the mnemonic, focus is assigned to the first child of the group. On most platforms, the mnemonic appears underlined but may be emphasised in a platform specific manner. The mnemonic indicator character '&' can be escaped by doubling it in the string, causing a single '&' to be displayed.

Parameters:
text - the new text
Throws:
IllegalArgumentException -
  • ERROR_NULL_ARGUMENT - if the text is null
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getText

public 
String getText()
Returns the receiver's text, which is the string that the is used as the title. If the text has not previously been set, returns an empty string.

Returns:
the text
Throws:
SWTException -
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver

getClientArea

public 
Rectangle getClientArea()
Description copied from class: Scrollable
Returns a rectangle which describes the area of the receiver which is capable of displaying data (that is, not covered by the "trimmings").

Overrides:
getClientArea in class Scrollable
Returns:
the client area
See Also:
Scrollable.computeTrim(int, int, int, int)

computeTrim

public 
Rectangle computeTrim(int x,
                             int y,
                             int width,
                             int height)
Description copied from class: Scrollable
Given a desired client area for the receiver (as described by the arguments), returns the bounding rectangle which would be required to produce that client area.

In other words, it returns a rectangle such that, if the receiver's bounds were set to that rectangle, the area of the receiver which is capable of displaying data (that is, not covered by the "trimmings") would be the rectangle described by the arguments (relative to the receiver's parent).

Overrides:
computeTrim in class Scrollable
Parameters:
x - the desired x coordinate of the client area
y - the desired y coordinate of the client area
width - the desired width of the client area
height - the desired height of the client area
Returns:
the required bounds to produce the given client area
See Also:
Scrollable.getClientArea()

computeSize

public 
Point computeSize(int wHint,
                         int hHint,
                         boolean changed)
Description copied from class: Control
Returns the preferred size of the receiver.

The preferred size of a control is the size that it would best be displayed at. The width hint and height hint arguments allow the caller to ask a control questions such as "Given a particular width, how high does the control need to be to show all of the contents?" To indicate that the caller does not wish to constrain a particular dimension, the constant SWT.DEFAULT is passed for the hint.

If the changed flag is true, it indicates that the receiver's contents have changed, therefore any caches that a layout manager containing the control may have been keeping need to be flushed. When the control is resized, the changed flag will be false, so layout manager caches can be retained.

Overrides:
computeSize in class Composite

Eclipse Rich Ajax Platform
Release 1.2

Copyright (c) Innoopract Informationssysteme GmbH and others 2002, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire