org.eclipse.swt.custom

Class CTabItem

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.Item

org.eclipse.swt.custom.CTabItem

public class CTabItem
extends Item

Instances of this class represent a selectable user interface object that represent a page in a notebook widget.

Styles:

SWT.CLOSE

Events:

(none)

IMPORTANT: This class is not intended to be subclassed.

See Also:

CTabFolder, CTabItem snippets, Sample code and further information

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	closeImageState
(package private) Rectangle	closeRect
(package private) Control	control
(package private) Image	disabledImage
(package private) Font	font
(package private) int	height
(package private) CTabFolder	parent
(package private) java.lang.String	shortenedText
(package private) int	shortenedTextWidth
(package private) boolean	showClose
(package private) boolean	showing
(package private) int	state
(package private) java.lang.String	toolTipText
(package private) int	width
(package private) int	x
(package private) int	y

Constructor Summary

Constructors

Constructor and Description
CTabItem(CTabFolder parent, int style) Constructs a new instance of this class given its parent (which must be a CTabFolder) and a style value describing its behavior and appearance.
CTabItem(CTabFolder parent, int style, int index) Constructs a new instance of this class given its parent (which must be a CTabFolder), a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent.

Method Summary

Methods

Modifier and Type	Method and Description
void	dispose() Disposes of the operating system resources associated with the receiver and all its descendants.
Rectangle	getBounds() Returns a rectangle describing the receiver's size and location relative to its parent.
Control	getControl() Gets the control that is displayed in the content area of the tab item.
Image	getDisabledImage() Deprecated. the disabled image is not used
Font	getFont() Returns the font that the receiver will use to paint textual information.
CTabFolder	getParent() Returns the receiver's parent, which must be a CTabFolder.
boolean	getShowClose() Returns true to indicate that the receiver's close button should be shown.
java.lang.String	getToolTipText() Returns the receiver's tool tip text, or null if it has not been set.
boolean	isShowing() Returns true if the item will be rendered in the visible area of the CTabFolder.
void	setControl(Control control) Sets the control that is used to fill the client area of the tab folder when the user selects the tab item.
void	setDisabledImage(Image image) Deprecated. This image is not used
void	setFont(Font font) Sets the font that the receiver will use to paint textual information for this item to the font specified by the argument, or to the default font for that kind of control if the argument is null.
void	setImage(Image image) Sets the receiver's image to the argument, which may be null indicating that no image should be displayed.
void	setShowClose(boolean close) Sets to true to indicate that the receiver's close button should be shown.
void	setText(java.lang.String string) Sets the receiver's text.
void	setToolTipText(java.lang.String string) Sets the receiver's tool tip text to the argument, which may be null indicating that the default tool tip for the control will be shown.

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

checkSubclass, getImage, getText

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

addDisposeListener, addListener, checkWidget, getData, getData, getDisplay, getListeners, getStyle, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, reskin, setData, setData, toString

Methods inherited from class java.lang.Object

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

Field Detail

parent

CTabFolder parent

x

int x

y

int y

width

int width

height

int height

control

Control control

toolTipText

java.lang.String toolTipText

shortenedText

java.lang.String shortenedText

shortenedTextWidth

int shortenedTextWidth

font

Font font

disabledImage

Image disabledImage

closeRect

Rectangle closeRect

closeImageState

int closeImageState

state

int state

showClose

boolean showClose

showing

boolean showing

Constructor Detail

CTabItem

public CTabItem(CTabFolder parent,
        int style)

Constructs a new instance of this class given its parent (which must be a CTabFolder) and a style value describing its behavior and appearance. The item is added to the end of the items maintained by its parent.

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 CTabFolder 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

See Also:

SWT, Widget.getStyle()

CTabItem

public CTabItem(CTabFolder parent,
        int style,
        int index)

Constructs a new instance of this class given its parent (which must be a CTabFolder), a style value describing its behavior and appearance, and the index at which to place it in the items maintained by its parent.

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 CTabFolder which will be the parent of the new instance (cannot be null)

style - the style of control to construct

index - the zero-relative index to store the receiver in its parent

Throws:

java.lang.IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null
• ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent

See Also:

SWT, Widget.getStyle()

Method Detail

dispose

public void dispose()

Description copied from class: Widget

Disposes of the operating system resources associated with the receiver and all its descendants. After this method has been invoked, the receiver and all descendants will answer true when sent the message isDisposed(). Any internal connections between the widgets in the tree will have been removed to facilitate garbage collection. This method does nothing if the widget is already disposed.

NOTE: This method is not called recursively on the descendants of the receiver. This means that, widget implementers can not detect when a widget is being disposed of by re-implementing this method, but should instead listen for the Dispose event.

Overrides:

dispose in class Widget

See Also:

Widget.addDisposeListener(org.eclipse.swt.events.DisposeListener), Widget.removeDisposeListener(org.eclipse.swt.events.DisposeListener), Widget.checkWidget()

getBounds

public Rectangle getBounds()

Returns a rectangle describing the receiver's size and location relative to its parent.

Returns:

the receiver's bounding column rectangle

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

getControl

public Control getControl()

Gets the control that is displayed in the content area of the tab item.

Returns:

the control

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

getDisabledImage

public Image getDisabledImage()

Deprecated. the disabled image is not used

Get the image displayed in the tab if the tab is disabled.

Returns:

the disabled image or null

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

getFont

public Font getFont()

Returns the font that the receiver will use to paint textual information.

Returns:

the receiver's font

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:

3.0

getParent

public CTabFolder getParent()

Returns the receiver's parent, which must be a CTabFolder.

Returns:

the receiver's parent

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

getShowClose

public boolean getShowClose()

Returns true to indicate that the receiver's close button should be shown. Otherwise return false. The initial value is defined by the style (SWT.CLOSE) that was used to create the receiver.

Returns:

true if the close button should be shown

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

getToolTipText

public java.lang.String getToolTipText()

Returns the receiver's tool tip text, or null if it has not been set.

Returns:

the receiver's tool tip 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

isShowing

public boolean isShowing()

Returns true if the item will be rendered in the visible area of the CTabFolder. Returns false otherwise.

Returns:

true if the item will be rendered in the visible area of the CTabFolder. Returns false otherwise.

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:

3.0

setControl

public void setControl(Control control)

Sets the control that is used to fill the client area of the tab folder when the user selects the tab item.

Parameters:

control - the new control (or null)

Throws:

java.lang.IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the control has been disposed
• ERROR_INVALID_PARENT - if the control is not in the same widget tree

SWTException -

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

setDisabledImage

public void setDisabledImage(Image image)

Deprecated. This image is not used

Sets the image that is displayed if the tab item is disabled. Null will clear the image.

Parameters:

image - the image to be displayed when the item is disabled or null

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

setFont

public void setFont(Font font)

Sets the font that the receiver will use to paint textual information for this item to the font specified by the argument, or to the default font for that kind of control if the argument is null.

Parameters:

font - the new font (or null)

Throws:

java.lang.IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the argument 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

Since:

3.0

setImage

public void setImage(Image image)

Description copied from class: Item

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

Overrides:

setImage in class Item

Parameters:

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

setShowClose

public void setShowClose(boolean close)

Sets to true to indicate that the receiver's close button should be shown. If the parent (CTabFolder) was created with SWT.CLOSE style, changing this value has no effect.

Parameters:

close - the new state of the close button

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

setText

public void setText(java.lang.String string)

Description copied from class: Item

Sets the receiver's text.

Overrides:

setText in class Item

Parameters:

string - the new text

setToolTipText

public void setToolTipText(java.lang.String string)

Sets the receiver's tool tip text to the argument, which may be null indicating that the default tool tip for the control will be shown. For a control that has a default tool tip, such as the Tree control on Windows, setting the tool tip text to an empty string replaces the default, causing no tool tip text to be shown.

The mnemonic indicator (character '&') is not displayed in a tool tip. To display a single '&' in the tool tip, the character '&' can be escaped by doubling it in the string.

Parameters:

string - the new tool tip text (or null)

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