org.eclipse.swt.widgets
Class Scale

java.lang.Object
  |
  +--org.eclipse.swt.widgets.Widget
        |
        +--org.eclipse.swt.widgets.Control
              |
              +--org.eclipse.swt.widgets.Scale

All Implemented Interfaces:

Drawable

public class Scale

extends Control

Unsafe: Instances of the receiver represent a selectable user interface object that present a range of continuous numeric values.

Styles:

HORIZONTAL, VERTICAL

Events:

Selection

Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.

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

Field Summary

(package private) static org.eclipse.swt.internal.win32.TCHAR	TrackBarClass
(package private) static int	TrackBarProc

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

ACCENTS, accessible, background, drawCount, foreground, handle, hCursor, layoutData, menu, parent, toolTipText

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

CANVAS, COMCTL32_MAJOR, COMCTL32_MINOR, data, DEFAULT_HEIGHT, DEFAULT_WIDTH, DISABLED, DISPOSED, eventTable, HIDDEN, keys, MAJOR, MINOR, Mnemonic, state, style, values

Constructor Summary

Scale(Composite parent, int style)
Enabled: Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

void	addSelectionListener(SelectionListener listener) Enabled: Adds the listener to the collection of listeners who will be notified when the receiver's value changes, by sending it one of the messages defined in the SelectionListener interface.
(package private) int	callWindowProc(int msg, int wParam, int lParam)
(package private) static int	checkStyle(int style)
Point	computeSize(int wHint, int hHint, boolean changed) Enabled:
(package private) void	createHandle()
(package private) int	defaultForeground()
int	getIncrement() Enabled: Returns the amount that the receiver's value will be modified by when the up/down (or right/left) arrows are pressed.
int	getMaximum() Enabled: Returns the maximum value which the receiver will allow.
int	getMinimum() Enabled: Returns the minimum value which the receiver will allow.
int	getPageIncrement() Enabled: Returns the amount that the receiver's value will be modified by when the page increment/decrement areas are selected.
int	getSelection() Enabled: Returns the single selection that is the receiver's position.
void	removeSelectionListener(SelectionListener listener) Enabled: Removes the listener from the collection of listeners who will be notified when the receiver's value changes.
(package private) void	setBackgroundPixel(int pixel)
void	setIncrement(int increment) Enabled: Sets the amount that the receiver's value will be modified by when the up/down (or right/left) arrows are pressed to the argument, which must be at least one.
void	setMaximum(int value) Enabled: Sets the maximum value which the receiver will allow to be the argument which must be greater than or equal to zero.
void	setMinimum(int value) Enabled: Sets the minimum value which the receiver will allow to be the argument which must be greater than or equal to zero.
void	setPageIncrement(int pageIncrement) Enabled: Sets the amount that the receiver's value will be modified by when the page increment/decrement areas are selected to the argument, which must be at least one.
void	setSelection(int value) Enabled: Sets the single selection that is the receiver's value to the argument which must be greater than or equal to zero.
(package private) int	widgetStyle()
(package private) org.eclipse.swt.internal.win32.TCHAR	windowClass()
(package private) int	windowProc()
(package private) org.eclipse.swt.internal.win32.LRESULT	wmScrollChild(int wParam, int lParam)

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

addControlListener, addFocusListener, addHelpListener, addKeyListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addPaintListener, addTraverseListener, checkOrientation, computeSize, computeTabGroup, computeTabList, computeTabRoot, createWidget, defaultBackground, defaultFont, deregister, destroyWidget, drawBackground, drawBackground, findBrush, findCursor, findMnemonic, fixFocus, forceFocus, forceResize, getAccessible, getBackground, getBackgroundPixel, getBorderWidth, getBounds, getCodePage, getDisplay, getEnabled, getFont, getForeground, getForegroundPixel, getLayoutData, getLocation, getMenu, getParent, getPath, getShell, getSize, getToolTipText, getVisible, hasCursor, hasFocus, internal_dispose_GC, internal_new_GC, isActive, isDisposed, isEnabled, isFocusAncestor, isFocusControl, isReparentable, isShowing, isTabGroup, isTabItem, isVisible, menuShell, mnemonicHit, mnemonicMatch, moveAbove, moveBelow, new_Accessible, pack, pack, redraw, redraw, register, releaseHandle, releaseWidget, removeControlListener, removeFocusListener, removeHelpListener, removeKeyListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removePaintListener, removeTraverseListener, sendKeyEvent, sendKeyEvent, sendMouseEvent, sendMouseEvent, setBackground, setBounds, setBounds, setBounds, setCapture, setCursor, setDefaultFont, setEnabled, setFocus, setFont, setForeground, setForegroundPixel, setLayoutData, setLocation, setLocation, setMenu, setParent, setRadioFocus, setRadioSelection, setRedraw, setSavedFocus, setSize, setSize, setTabGroupFocus, setTabItemFocus, setToolTipText, setVisible, sort, subclass, toControl, toControl, toDisplay, toDisplay, transferActive, transferFocus, translateAccelerator, translateMnemonic, translateMnemonic, translateTraversal, traverse, traverse, traverseEscape, traverseGroup, traverseItem, traverseMnemonic, traversePage, traverseReturn, unsubclass, update, update, updateFont, widgetExtStyle, windowProc, WM_ACTIVATE, WM_CHAR, WM_CLEAR, WM_CLOSE, WM_COMMAND, WM_CONTEXTMENU, WM_CTLCOLOR, WM_CUT, WM_DESTROY, WM_DRAWITEM, WM_ENDSESSION, WM_ERASEBKGND, WM_GETDLGCODE, WM_GETFONT, WM_GETOBJECT, WM_HELP, WM_HOTKEY, WM_HSCROLL, WM_IME_CHAR, WM_IME_COMPOSITION, WM_INITMENUPOPUP, WM_KEYDOWN, WM_KEYUP, WM_KILLFOCUS, WM_LBUTTONDBLCLK, WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONDBLCLK, WM_MBUTTONDOWN, WM_MBUTTONUP, WM_MEASUREITEM, WM_MENUCHAR, WM_MENUSELECT, WM_MOUSEACTIVATE, WM_MOUSEHOVER, WM_MOUSELEAVE, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_MOVE, WM_NCACTIVATE, WM_NCCALCSIZE, WM_NCHITTEST, WM_NOTIFY, WM_PAINT, WM_PALETTECHANGED, WM_PASTE, WM_PRINTCLIENT, WM_QUERYENDSESSION, WM_QUERYNEWPALETTE, WM_QUERYOPEN, WM_RBUTTONDBLCLK, WM_RBUTTONDOWN, WM_RBUTTONUP, WM_SETCURSOR, WM_SETFOCUS, WM_SETFONT, WM_SETREDRAW, WM_SETTINGCHANGE, WM_SHOWWINDOW, WM_SIZE, WM_SYSCHAR, WM_SYSCOLORCHANGE, WM_SYSCOMMAND, WM_SYSKEYDOWN, WM_SYSKEYUP, WM_TIMER, WM_UNDO, WM_VSCROLL, WM_WINDOWPOSCHANGING, wmColorChild, wmCommandChild, wmDrawChild, wmMeasureChild, wmNotifyChild

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

addDisposeListener, addListener, checkBits, checkParent, checkSubclass, checkWidget, dispose, error, filters, getData, getData, getName, getNameText, getStyle, hooks, isListening, isValidSubclass, isValidThread, mbcsToWcs, mbcsToWcs, notifyListeners, postEvent, postEvent, releaseChild, releaseResources, removeDisposeListener, removeListener, removeListener, sendEvent, sendEvent, sendEvent, sendEvent, setData, setData, setInputState, setKeyState, toString, wcsToMbcs, wcsToMbcs

Methods inherited from class java.lang.Object

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

Field Detail

TrackBarProc

static final int TrackBarProc

TrackBarClass

static final org.eclipse.swt.internal.win32.TCHAR TrackBarClass

Constructor Detail

Scale

public Scale(Composite parent,
             int style)

Enabled: 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

See Also:

SWT.HORIZONTAL, SWT.VERTICAL, Widget.checkSubclass(), Widget.getStyle()

Method Detail

addSelectionListener

public void addSelectionListener(SelectionListener listener)

Enabled: Adds the listener to the collection of listeners who will be notified when the receiver's value changes, by sending it one of the messages defined in the SelectionListener interface.

Parameters:

listener - the listener which should be notified

See Also:

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

callWindowProc

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

Specified by:

callWindowProc in class Control

checkStyle

static int checkStyle(int style)

computeSize

public Point computeSize(int wHint,
                         int hHint,
                         boolean changed)

Enabled:

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(), "computeTrim, getClientArea for controls that implement them"

createHandle

void createHandle()

Overrides:

createHandle in class Control

defaultForeground

int defaultForeground()

Overrides:

defaultForeground in class Control

getIncrement

public int getIncrement()

Enabled: Returns the amount that the receiver's value will be modified by when the up/down (or right/left) arrows are pressed.

Returns:

the increment

getMaximum

public int getMaximum()

Enabled: Returns the maximum value which the receiver will allow.

Returns:

the maximum

getMinimum

public int getMinimum()

Enabled: Returns the minimum value which the receiver will allow.

Returns:

the minimum

getPageIncrement

public int getPageIncrement()

Enabled: Returns the amount that the receiver's value will be modified by when the page increment/decrement areas are selected.

Returns:

the page increment

getSelection

public int getSelection()

Enabled: Returns the single selection that is the receiver's position.

Returns:

the selection

removeSelectionListener

public void removeSelectionListener(SelectionListener listener)

Enabled: Removes the listener from the collection of listeners who will be notified when the receiver's value changes.

Parameters:

listener - the listener which should no longer be notified

See Also:

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

setBackgroundPixel

void setBackgroundPixel(int pixel)

Overrides:

setBackgroundPixel in class Control

setIncrement

public void setIncrement(int increment)

Enabled: Sets the amount that the receiver's value will be modified by when the up/down (or right/left) arrows are pressed to the argument, which must be at least one.

setMaximum

public void setMaximum(int value)

Enabled: Sets the maximum value which the receiver will allow to be the argument which must be greater than or equal to zero.

Parameters:

value - the new maximum (must be zero or greater)

setMinimum

public void setMinimum(int value)

Enabled: Sets the minimum value which the receiver will allow to be the argument which must be greater than or equal to zero.

Parameters:

value - the new minimum (must be zero or greater)

setPageIncrement

public void setPageIncrement(int pageIncrement)

Enabled: Sets the amount that the receiver's value will be modified by when the page increment/decrement areas are selected to the argument, which must be at least one.

Returns:

the page increment (must be greater than zero)

setSelection

public void setSelection(int value)

Enabled: Sets the single selection that is the receiver's value to the argument which must be greater than or equal to zero.

Parameters:

value - the new selection (must be zero or greater)

widgetStyle

int widgetStyle()

Overrides:

widgetStyle in class Control

windowClass

org.eclipse.swt.internal.win32.TCHAR windowClass()

Specified by:

windowClass in class Control

windowProc

int windowProc()

Specified by:

windowProc in class Control

wmScrollChild

org.eclipse.swt.internal.win32.LRESULT wmScrollChild(int wParam,
                                                     int lParam)

Overrides:

wmScrollChild in class Control