public class Label extends Control
Shadow styles are hints and may not be honoured by the platform. To create a separator label with the default shadow style for the platform, do not specify a shadow style.
Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. Only one of CENTER, LEFT and RIGHT may be specified.
IMPORTANT: This class is intended to be subclassed only within the SWT implementation.
setText(), the method
null, and after calling
getTextwill return the empty string.
|Constructor and Description|
Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.
|Modifier and Type||Method and Description|
Returns the preferred size of the receiver.
Implementation of the
Returns a value which describes the position of the text or image in the receiver.
Returns the receiver's image if it has one, or null if it does not.
Returns the receiver's text, which will be an empty string if it has never been set or if the receiver is a
Controls how text and images will be displayed in the receiver.
Sets the application defined property of the receiver with the specified name to the given value.
Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.
Sets the receiver's text.
addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addTouchListener, addTraverseListener, computeSize, forceFocus, getAccessible, getBackground, getBackgroundImage, getBorderWidth, getBounds, getCursor, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getOrientation, getParent, getShell, getSize, getToolTipText, getTouchEnabled, getVisible, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, redraw, redraw, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeTouchListener, removeTraverseListener, requestLayout, setBackground, setBackgroundImage, setBounds, setBounds, setCursor, setEnabled, setFocus, setFont, setForeground, setLayoutData, setLocation, setLocation, setMenu, setOrientation, setParent, setRedraw, setSize, setSize, setToolTipText, setTouchEnabled, setVisible, toControl, toControl, toDisplay, toDisplay, update
addDisposeListener, addListener, checkSubclass, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, reskin, setData, toString
public Label(Composite parent, int style)
The style value is either one of the style constants defined in
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
SWT style constants. The class description
lists the style constants that are applicable to the class.
Style bits are also inherited from superclasses.
parent- a composite control which will be the parent of the new instance (cannot be null)
style- the style of control to construct
public void setText(java.lang.String text)
This method sets the widget label. The label may include the mnemonic character and line delimiters.
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 control that follows the label. 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.
text- the new text
public java.lang.String getText()
public void setImage(Image image)
image- the image to display on the receiver (may be null)
public Image getImage()
public void setAlignment(int alignment)
CENTER. If the receiver is a
SEPARATORlabel, the argument is ignored and the alignment is not changed.
alignment- the new alignment
public int getAlignment()
CENTERunless the receiver is a
SEPARATORlabel, in which case,
public Point computeSize(int wHint, int hHint, boolean changed)
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.
wHint- the width hint (can be
hHint- the height hint (can be
trueif the control's contents have changed, and
Control.pack(boolean), "computeTrim, getClientArea for controls that implement them"
public void setData(java.lang.String key, java.lang.Object value)
Applications may associate arbitrary objects with the receiver in this fashion. If the objects stored in the properties need to be notified when the widget is disposed of, it is the application's responsibility to hook the Dispose event on the widget and do so.
key- the name of the property
value- the new value for the property
public <T> T getAdapter(java.lang.Class<T> adapter)
IMPORTANT: This method is not part of the RWT public API. It is marked public only so that it can be shared within the packages provided by RWT. It should never be accessed from application code.
adapter- the lookup class
nullif there is no adapter associated with the given class.
Copyright (c) EclipseSource and others 2002, 2019.
All rights reserved. This program and the accompanying materials
are made available under the terms of the
Eclipse Public License v1.0
Copyright (c) EclipseSource and others 2002, 2019. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0