org.eclipse.swt.widgets

Class Button

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.Control

org.eclipse.swt.widgets.Button

All Implemented Interfaces:

Drawable

public class Button
extends Control

Instances of this class represent a selectable user interface object that issues notification when pressed and released.

Styles:

ARROW, CHECK, PUSH, RADIO, TOGGLE, FLAT, WRAP

UP, DOWN, LEFT, RIGHT, CENTER

Events:

Selection

Note: Only one of the styles ARROW, CHECK, PUSH, RADIO, and TOGGLE may be specified.

Note: Only one of the styles LEFT, RIGHT, and CENTER may be specified.

Note: Only one of the styles UP, DOWN, LEFT, and RIGHT may be specified when the ARROW style is specified.

IMPORTANT: This class is not intended to be subclassed.

See Also:

Button snippets, SWT Example: ControlExample, Sample code and further information

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static TCHAR	ButtonClass
(package private) static int	ButtonProc
(package private) static int	CHECK_HEIGHT
(package private) static int	CHECK_WIDTH
(package private) static boolean	COMMAND_LINK
(package private) Image	disabledImage
(package private) boolean	grayed
(package private) static int	ICON_HEIGHT
(package private) static int	ICON_WIDTH
(package private) boolean	ignoreMouse
(package private) Image	image
(package private) Image	image2
(package private) ImageList	imageList
(package private) static int	MARGIN
(package private) java.lang.String	message
(package private) java.lang.String	text

Fields inherited from class org.eclipse.swt.widgets.Control

accessible, background, backgroundImage, cursor, drawCount, font, foreground, handle, layoutData, menu, parent, region, toolTipText

Fields inherited from class org.eclipse.swt.widgets.Widget

CANVAS, data, DEFAULT_HEIGHT, DEFAULT_WIDTH, DISABLED, display, DISPOSE_SENT, DISPOSED, DRAG_DETECT, DRAW_BACKGROUND, eventTable, FOREIGN_HANDLE, HIDDEN, IGNORE_WM_CHANGEUISTATE, KEYED_DATA, LAYOUT_CHANGED, LAYOUT_CHILD, LAYOUT_NEEDED, MAJOR, MINOR, MOVE_DEFERRED, MOVE_OCCURRED, PARENT_BACKGROUND, RELEASED, RESIZE_DEFERRED, RESIZE_OCCURRED, SKIN_NEEDED, state, style, THEME_BACKGROUND, TRACK_MOUSE

Constructor Summary

Constructors

Constructor and Description
Button(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

Methods

Modifier and Type	Method and Description
(package private) void	_setImage(Image image)
(package private) void	_setText(java.lang.String text)
void	addSelectionListener(SelectionListener listener) Adds the listener to the collection of listeners who will be notified when the control is selected by the user, by sending it one of the messages defined in the SelectionListener interface.
(package private) int	callWindowProc(int hwnd, int msg, int wParam, int lParam)
(package private) static int	checkStyle(int style)
(package private) void	click()
(package private) int	computeLeftMargin()
Point	computeSize(int wHint, int hHint, boolean changed) Returns the preferred size of the receiver.
(package private) void	createHandle()
(package private) int	defaultBackground()
(package private) int	defaultForeground()
(package private) void	enableWidget(boolean enabled)
int	getAlignment() Returns a value which describes the position of the text or image in the receiver.
(package private) boolean	getDefault()
boolean	getGrayed() Returns true if the receiver is grayed, and false otherwise.
Image	getImage() Returns the receiver's image if it has one, or null if it does not.
(package private) java.lang.String	getMessage() Returns the widget message.
(package private) java.lang.String	getNameText()
boolean	getSelection() Returns true if the receiver is selected, and false otherwise.
java.lang.String	getText() Returns the receiver's text, which will be an empty string if it has never been set or if the receiver is an ARROW button.
(package private) boolean	isTabItem()
(package private) boolean	mnemonicHit(char ch)
(package private) boolean	mnemonicMatch(char key)
(package private) void	releaseWidget()
void	removeSelectionListener(SelectionListener listener) Removes the listener from the collection of listeners who will be notified when the control is selected by the user.
(package private) void	selectRadio()
void	setAlignment(int alignment) Controls how text, images and arrows will be displayed in the receiver.
(package private) void	setDefault(boolean value)
boolean	setFocus() Causes the receiver to have the keyboard focus, such that all keyboard events will be delivered to it.
void	setGrayed(boolean grayed) Sets the grayed state of the receiver.
void	setImage(Image image) Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.
(package private) void	setMessage(java.lang.String message) Sets the widget message.
(package private) boolean	setRadioFocus(boolean tabbing)
(package private) boolean	setRadioSelection(boolean value)
(package private) boolean	setSavedFocus()
void	setSelection(boolean selected) Sets the selection state of the receiver, if it is of type CHECK, RADIO, or TOGGLE.
void	setText(java.lang.String string) Sets the receiver's text.
(package private) void	updateImageList()
(package private) void	updateOrientation()
(package private) void	updateSelection(int flags)
(package private) int	widgetStyle()
(package private) TCHAR	windowClass()
(package private) int	windowProc()
(package private) LRESULT	WM_ERASEBKGND(int wParam, int lParam)
(package private) LRESULT	WM_GETDLGCODE(int wParam, int lParam)
(package private) LRESULT	WM_GETOBJECT(int wParam, int lParam)
(package private) LRESULT	WM_KILLFOCUS(int wParam, int lParam)
(package private) LRESULT	WM_LBUTTONDOWN(int wParam, int lParam)
(package private) LRESULT	WM_LBUTTONUP(int wParam, int lParam)
(package private) LRESULT	WM_SETFOCUS(int wParam, int lParam)
(package private) LRESULT	WM_SIZE(int wParam, int lParam)
(package private) LRESULT	WM_SYSCOLORCHANGE(int wParam, int lParam)
(package private) LRESULT	WM_UPDATEUISTATE(int wParam, int lParam)
(package private) LRESULT	wmColorChild(int wParam, int lParam)
(package private) LRESULT	wmCommandChild(int wParam, int lParam)
(package private) LRESULT	wmDrawChild(int wParam, int lParam)

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

addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addMouseWheelListener, addPaintListener, addTouchListener, addTraverseListener, binarySearch, borderHandle, checkBackground, checkBorder, checkBuffered, checkComposited, checkGesture, checkHandle, checkMirrored, computeSize, computeTabGroup, computeTabList, computeTabRoot, createWidget, defaultFont, deregister, destroyWidget, dragDetect, dragDetect, dragDetect, drawBackground, drawBackground, drawBackground, drawImageBackground, drawThemeBackground, enableDrag, fillBackground, fillImageBackground, fillThemeBackground, findBackgroundControl, findBrush, findCursor, findImageControl, findMenus, findMnemonic, findThemeControl, fixChildren, fixFocus, forceFocus, forceResize, getAccessible, getBackground, getBackgroundImage, getBackgroundPixel, getBorderWidth, getBounds, getClipboardText, getCodePage, getCursor, getDragDetect, getDrawing, getEnabled, getFont, getForeground, getForegroundPixel, getLayoutData, getLocation, getMenu, getMonitor, getOrientation, getParent, getPath, getRegion, getShell, getSize, getToolTipText, getTouchEnabled, getVisible, hasCursor, hasFocus, internal_dispose_GC, internal_new_GC, isActive, isEnabled, isFocusAncestor, isFocusControl, isReparentable, isShowing, isTabGroup, isVisible, mapEvent, markLayout, menuShell, moveAbove, moveBelow, new_Accessible, new_GC, pack, pack, print, printWidget, redraw, redraw, redraw, redrawChildren, register, releaseHandle, releaseParent, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removeMouseWheelListener, removePaintListener, removeTouchListener, removeTraverseListener, sendFocusEvent, sendGestureEvent, sendMove, sendResize, sendTouchEvent, setBackground, setBackground, setBackgroundImage, setBackgroundImage, setBackgroundPixel, setBounds, setBounds, setBounds, setBounds, setCapture, setCursor, setCursor, setDefaultFont, setDragDetect, setEnabled, setFont, setForeground, setForegroundPixel, setLayoutData, setLocation, setLocation, setMenu, setOrientation, setParent, setRedraw, setRegion, setSize, setSize, setTabItemFocus, setToolTipText, setToolTipText, setTouchEnabled, setVisible, showWidget, sort, subclass, toControl, toControl, toDisplay, toDisplay, topHandle, translateAccelerator, translateMnemonic, translateMnemonic, translateTraversal, traverse, traverse, traverse, traverse, traverse, traverseEscape, traverseGroup, traverseItem, traverseMnemonic, traversePage, traverseReturn, unsubclass, update, update, updateBackgroundColor, updateBackgroundImage, updateBackgroundMode, updateFont, updateImages, updateLayout, widgetCreateStruct, widgetExtStyle, widgetParent, windowProc, WM_ACTIVATE, WM_CAPTURECHANGED, WM_CHANGEUISTATE, WM_CHAR, WM_CLEAR, WM_CLOSE, WM_COMMAND, WM_CONTEXTMENU, WM_CTLCOLOR, WM_CUT, WM_DESTROY, WM_DRAWITEM, WM_ENDSESSION, WM_ENTERIDLE, WM_GESTURE, WM_GETFONT, WM_GETMINMAXINFO, WM_HELP, WM_HOTKEY, WM_HSCROLL, WM_IME_CHAR, WM_IME_COMPOSITION_START, WM_IME_COMPOSITION, WM_IME_ENDCOMPOSITION, WM_INITMENUPOPUP, WM_INPUTLANGCHANGE, WM_KEYDOWN, WM_KEYUP, WM_LBUTTONDBLCLK, WM_MBUTTONDBLCLK, WM_MBUTTONDOWN, WM_MBUTTONUP, WM_MEASUREITEM, WM_MENUCHAR, WM_MENUSELECT, WM_MOUSEACTIVATE, WM_MOUSEHOVER, WM_MOUSEHWHEEL, WM_MOUSELEAVE, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_MOVE, WM_NCACTIVATE, WM_NCCALCSIZE, WM_NCHITTEST, WM_NCLBUTTONDOWN, WM_NCPAINT, WM_NOTIFY, WM_PAINT, WM_PALETTECHANGED, WM_PARENTNOTIFY, WM_PASTE, WM_PRINT, WM_PRINTCLIENT, WM_QUERYENDSESSION, WM_QUERYNEWPALETTE, WM_QUERYOPEN, WM_RBUTTONDBLCLK, WM_RBUTTONDOWN, WM_RBUTTONUP, WM_SETCURSOR, WM_SETFONT, WM_SETREDRAW, WM_SETTINGCHANGE, WM_SHOWWINDOW, WM_SYSCHAR, WM_SYSCOMMAND, WM_SYSKEYDOWN, WM_SYSKEYUP, WM_TABLET_FLICK, WM_TIMER, WM_TOUCH, WM_UNDO, WM_UNINITMENUPOPUP, WM_VSCROLL, WM_WINDOWPOSCHANGED, WM_WINDOWPOSCHANGING, WM_XBUTTONDBLCLK, WM_XBUTTONDOWN, WM_XBUTTONUP, wmMeasureChild, wmNotify, wmNotifyChild, wmScrollChild

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

_addListener, addDisposeListener, addListener, checkBits, checkOpened, checkOrientation, checkParent, checkSubclass, checkWidget, DeferWindowPos, dispose, dragDetect, error, filters, findItem, fixMnemonic, fixMnemonic, getData, getData, getDisplay, getListeners, getName, getStyle, hooks, isDisposed, isListening, isValidSubclass, isValidThread, notifyListeners, postEvent, postEvent, release, releaseChildren, removeDisposeListener, removeListener, removeListener, reskin, reskinChildren, reskinWidget, sendDragEvent, sendDragEvent, sendEvent, sendEvent, sendEvent, sendEvent, sendKeyEvent, sendKeyEvent, sendMouseEvent, sendMouseEvent, sendMouseWheelEvent, sendSelectionEvent, sendSelectionEvent, setData, setData, setInputState, setKeyState, setLocationMask, setTabGroupFocus, SetWindowPos, showMenu, showMenu, toString, updateMenuLocation, wmCaptureChanged, wmChar, wmContextMenu, wmIMEChar, wmKeyDown, wmKeyUp, wmKillFocus, wmLButtonDblClk, wmLButtonDown, wmLButtonUp, wmMButtonDblClk, wmMButtonDown, wmMButtonUp, wmMouseHover, wmMouseHWheel, wmMouseLeave, wmMouseMove, wmMouseWheel, wmNCPaint, wmPaint, wmPrint, wmRButtonDblClk, wmRButtonDown, wmRButtonUp, wmSetFocus, wmSysChar, wmSysKeyDown, wmSysKeyUp, wmXButtonDblClk, wmXButtonDown, wmXButtonUp

Methods inherited from class java.lang.Object

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

Field Detail

text

java.lang.String text

message

java.lang.String message

image

Image image

image2

Image image2

disabledImage

Image disabledImage

imageList

ImageList imageList

ignoreMouse

boolean ignoreMouse

grayed

boolean grayed

MARGIN

static final int MARGIN

See Also:

Constant Field Values

CHECK_WIDTH

static final int CHECK_WIDTH

CHECK_HEIGHT

static final int CHECK_HEIGHT

ICON_WIDTH

static final int ICON_WIDTH

See Also:

Constant Field Values

ICON_HEIGHT

static final int ICON_HEIGHT

See Also:

Constant Field Values

COMMAND_LINK

static boolean COMMAND_LINK

ButtonProc

static final int ButtonProc

ButtonClass

static final TCHAR ButtonClass

Constructor Detail

Button

public Button(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.

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:

java.lang.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.ARROW, SWT.CHECK, SWT.PUSH, SWT.RADIO, SWT.TOGGLE, SWT.FLAT, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, SWT.CENTER, Widget.checkSubclass(), Widget.getStyle()

Method Detail

_setImage

void _setImage(Image image)

_setText

void _setText(java.lang.String text)

addSelectionListener

public void addSelectionListener(SelectionListener listener)

Adds the listener to the collection of listeners who will be notified when the control is selected by the user, by sending it one of the messages defined in the SelectionListener interface.

widgetSelected is called when the control is selected by the user. widgetDefaultSelected is not called.

When the SWT.RADIO style bit is set, the widgetSelected method is also called when the receiver loses selection because another item in the same radio group was selected by the user. During widgetSelected the application can use getSelection() to determine the current selected state of the receiver.

Parameters:

listener - the listener which should be notified

Throws:

java.lang.IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener 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

See Also:

SelectionListener, removeSelectionListener(org.eclipse.swt.events.SelectionListener), SelectionEvent

callWindowProc

int callWindowProc(int hwnd,
                 int msg,
                 int wParam,
                 int lParam)

Overrides:

callWindowProc in class Widget

checkStyle

static int checkStyle(int style)

click

void click()

computeLeftMargin

int computeLeftMargin()

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 Control

Parameters:

wHint - the width hint (can be SWT.DEFAULT)

hHint - the height hint (can be SWT.DEFAULT)

changed - true if the control's contents have changed, and false otherwise

Returns:

the preferred size of the control.

See Also:

Layout, Control.getBorderWidth(), Control.getBounds(), Control.getSize(), Control.pack(boolean), "computeTrim, getClientArea for controls that implement them"

createHandle

void createHandle()

Overrides:

createHandle in class Control

defaultBackground

int defaultBackground()

Overrides:

defaultBackground in class Control

defaultForeground

int defaultForeground()

Overrides:

defaultForeground in class Control

enableWidget

void enableWidget(boolean enabled)

Overrides:

enableWidget in class Control

getAlignment

public int getAlignment()

Returns a value which describes the position of the text or image in the receiver. The value will be one of LEFT, RIGHT or CENTER unless the receiver is an ARROW button, in which case, the alignment will indicate the direction of the arrow (one of LEFT, RIGHT, UP or DOWN).

Returns:

the alignment

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

getDefault

boolean getDefault()

getGrayed

public boolean getGrayed()

Returns true if the receiver is grayed, and false otherwise. When the widget does not have the CHECK style, return false.

Returns:

the grayed state of the checkbox

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

Since:

3.4

getImage

public Image getImage()

Returns the receiver's image if it has one, or null if it does not.

Returns:

the receiver's image

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

getMessage

java.lang.String getMessage()

Returns the widget message. When the widget is created with the style SWT.COMMAND, the message text is displayed to provide further information for the user.

Returns:

the widget message

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

Since:

3.3

getNameText

java.lang.String getNameText()

Overrides:

getNameText in class Widget

getSelection

public boolean getSelection()

Returns true if the receiver is selected, and false otherwise.

When the receiver is of type CHECK or RADIO, it is selected when it is checked. When it is of type TOGGLE, it is selected when it is pushed in. If the receiver is of any other type, this method returns false.

Returns:

the selection state

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

getText

public java.lang.String getText()

Returns the receiver's text, which will be an empty string if it has never been set or if the receiver is an ARROW button.

Returns:

the receiver's 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

isTabItem

boolean isTabItem()

Overrides:

isTabItem in class Control

mnemonicHit

boolean mnemonicHit(char ch)

Overrides:

mnemonicHit in class Control

mnemonicMatch

boolean mnemonicMatch(char key)

Overrides:

mnemonicMatch in class Control

releaseWidget

void releaseWidget()

Overrides:

releaseWidget in class Control

removeSelectionListener

public void removeSelectionListener(SelectionListener listener)

Removes the listener from the collection of listeners who will be notified when the control is selected by the user.

Parameters:

listener - the listener which should no longer be notified

Throws:

java.lang.IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the listener 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

See Also:

SelectionListener, addSelectionListener(org.eclipse.swt.events.SelectionListener)

selectRadio

void selectRadio()

setAlignment

public void setAlignment(int alignment)

Controls how text, images and arrows will be displayed in the receiver. The argument should be one of LEFT, RIGHT or CENTER unless the receiver is an ARROW button, in which case, the argument indicates the direction of the arrow (one of LEFT, RIGHT, UP or DOWN).

Parameters:

alignment - the new alignment

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

setDefault

void setDefault(boolean value)

setFocus

public boolean setFocus()

Description copied from class: Control

Causes the receiver to have the keyboard focus, such that all keyboard events will be delivered to it. Focus reassignment will respect applicable platform constraints.

Overrides:

setFocus in class Control

Returns:

true if the control got focus, and false if it was unable to.

See Also:

Control.forceFocus()

setImage

public void setImage(Image image)

Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.

Note that a Button can display an image and text simultaneously on Windows (starting with XP), GTK+ and OSX. On other platforms, a Button that has an image and text set into it will display the image or text that was set most recently.

Parameters:

image - the image to display on the receiver (may be null)

Throws:

java.lang.IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the image has been disposed

SWTException -

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

setGrayed

public void setGrayed(boolean grayed)

Sets the grayed state of the receiver. This state change only applies if the control was created with the SWT.CHECK style.

Parameters:

grayed - the new grayed state

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

Since:

3.4

setMessage

void setMessage(java.lang.String message)

Sets the widget message. When the widget is created with the style SWT.COMMAND, the message text is displayed to provide further information for the user.

Parameters:

message - the new message

Throws:

java.lang.IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the string 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

Since:

3.3

setRadioFocus

boolean setRadioFocus(boolean tabbing)

Overrides:

setRadioFocus in class Control

setRadioSelection

boolean setRadioSelection(boolean value)

Overrides:

setRadioSelection in class Control

setSavedFocus

boolean setSavedFocus()

Overrides:

setSavedFocus in class Control

setSelection

public void setSelection(boolean selected)

Sets the selection state of the receiver, if it is of type CHECK, RADIO, or TOGGLE.

When the receiver is of type CHECK or RADIO, it is selected when it is checked. When it is of type TOGGLE, it is selected when it is pushed in.

Parameters:

selected - the new selection state

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

setText

public void setText(java.lang.String string)

Sets the receiver's text.

This method sets the button label. The label may include the mnemonic character but must not contain 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, a selection event occurs. On most platforms, the mnemonic appears underlined but may be emphasized in a platform specific manner. The mnemonic indicator character '&' can be escaped by doubling it in the string, causing a single '&' to be displayed.

Note that a Button can display an image and text simultaneously on Windows (starting with XP), GTK+ and OSX. On other platforms, a Button that has an image and text set into it will display the image or text that was set most recently.

Parameters:

string - the new text

Throws:

java.lang.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

updateImageList

void updateImageList()

updateOrientation

void updateOrientation()

Overrides:

updateOrientation in class Control

updateSelection

void updateSelection(int flags)

widgetStyle

int widgetStyle()

Overrides:

widgetStyle in class Control

windowClass

TCHAR windowClass()

Specified by:

windowClass in class Control

windowProc

int windowProc()

Specified by:

windowProc in class Control

WM_ERASEBKGND

LRESULT WM_ERASEBKGND(int wParam,
                    int lParam)

Overrides:

WM_ERASEBKGND in class Control

WM_GETDLGCODE

LRESULT WM_GETDLGCODE(int wParam,
                    int lParam)

Overrides:

WM_GETDLGCODE in class Control

WM_GETOBJECT

LRESULT WM_GETOBJECT(int wParam,
                   int lParam)

Overrides:

WM_GETOBJECT in class Control

WM_KILLFOCUS

LRESULT WM_KILLFOCUS(int wParam,
                   int lParam)

Overrides:

WM_KILLFOCUS in class Control

WM_LBUTTONDOWN

LRESULT WM_LBUTTONDOWN(int wParam,
                     int lParam)

Overrides:

WM_LBUTTONDOWN in class Control

WM_LBUTTONUP

LRESULT WM_LBUTTONUP(int wParam,
                   int lParam)

Overrides:

WM_LBUTTONUP in class Control

WM_SETFOCUS

LRESULT WM_SETFOCUS(int wParam,
                  int lParam)

Overrides:

WM_SETFOCUS in class Control

WM_SIZE

LRESULT WM_SIZE(int wParam,
              int lParam)

Overrides:

WM_SIZE in class Control

WM_SYSCOLORCHANGE

LRESULT WM_SYSCOLORCHANGE(int wParam,
                        int lParam)

Overrides:

WM_SYSCOLORCHANGE in class Control

WM_UPDATEUISTATE

LRESULT WM_UPDATEUISTATE(int wParam,
                       int lParam)

Overrides:

WM_UPDATEUISTATE in class Control

wmCommandChild

LRESULT wmCommandChild(int wParam,
                     int lParam)

Overrides:

wmCommandChild in class Control

wmColorChild

LRESULT wmColorChild(int wParam,
                   int lParam)

Overrides:

wmColorChild in class Control

wmDrawChild

LRESULT wmDrawChild(int wParam,
                  int lParam)

Overrides:

wmDrawChild in class Control