java.lang.Object
- org.eclipse.swt.widgets.Widget
- - org.eclipse.swt.widgets.Item
  - - org.eclipse.swt.widgets.TableColumn

```
public class TableColumn
extends Item
```
Instances of this class represent a column in a table widget.

Styles:

LEFT, RIGHT, CENTER

Events:

Move, Resize, Selection

Note: Only one of the styles LEFT, RIGHT and CENTER may be specified.
IMPORTANT: This class is not intended to be subclassed.

See Also:

Table, TableItem, TableColumn snippets, Sample code and further information

Restriction:

This class is not intended to be subclassed by clients.

Constructor Summary

Constructors
Constructor	Description
`TableColumn(Table parent, int style)`	Constructs a new instance of this class given its parent (which must be a `Table`) and a style value describing its behavior and appearance.
`TableColumn(Table parent, int style, int index)`	Constructs a new instance of this class given its parent (which must be a `Table`), 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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addControlListener(ControlListener listener)`	Adds the listener to the collection of listeners who will be notified when the control is moved or resized, by sending it one of the messages defined in the `ControlListener` interface.
`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.
`protected void`	`checkSubclass()`	Checks that this class can be subclassed.
`int`	`getAlignment()`	Returns a value which describes the position of the text or image in the receiver.
`boolean`	`getMoveable()`	Gets the moveable attribute.
`Table`	`getParent()`	Returns the receiver's parent, which must be a `Table`.
`boolean`	`getResizable()`	Gets the resizable attribute.
`String`	`getToolTipText()`	Returns the receiver's tool tip text, or null if it has not been set.
`int`	`getWidth()`	Gets the width of the receiver.
`void`	`pack()`	Causes the receiver to be resized to its preferred size.
`void`	`removeControlListener(ControlListener listener)`	Removes the listener from the collection of listeners who will be notified when the control is moved or resized.
`void`	`removeSelectionListener(SelectionListener listener)`	Removes the listener from the collection of listeners who will be notified when the control is selected by the user.
`void`	`setAlignment(int alignment)`	Controls how text and images will be displayed in 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.
`void`	`setMoveable(boolean moveable)`	Sets the moveable attribute.
`void`	`setResizable(boolean resizable)`	Sets the resizable attribute.
`void`	`setText(String string)`	Sets the receiver's text.
`void`	`setToolTipText(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.
`void`	`setWidth(int width)`	Sets the width of the receiver.

Methods inherited from class org.eclipse.swt.widgets.Item
getImage, getText

Methods inherited from class org.eclipse.swt.widgets.Widget
addDisposeListener, addListener, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, isAutoDirection, 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

- Constructor Detail
  - TableColumn
```
public TableColumn(Table parent,
                   int style)
```
    Constructs a new instance of this class given its parent (which must be a Table) 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 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.LEFT, SWT.RIGHT, SWT.CENTER, Widget.checkSubclass(), Widget.getStyle()
  - TableColumn
```
public TableColumn(Table parent,
                   int style,
                   int index)
```
    Constructs a new instance of this class given its parent (which must be a Table), 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.
    
    Note that due to a restriction on some platforms, the first column is always left aligned.
    Parameters:
    
    parent - a composite control 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:
    
    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
    
    ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
    
    See Also:
    
    SWT.LEFT, SWT.RIGHT, SWT.CENTER, Widget.checkSubclass(), Widget.getStyle()
- Method Detail
  - addControlListener
```
public void addControlListener(ControlListener listener)
```
    Adds the listener to the collection of listeners who will be notified when the control is moved or resized, by sending it one of the messages defined in the ControlListener interface.
    Parameters:
    
    listener - the listener which should be notified
    
    Throws:
    
    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:
    
    ControlListener, removeControlListener(org.eclipse.swt.events.ControlListener)
  - 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 column header is selected. widgetDefaultSelected is not called.
    Parameters:
    
    listener - the listener which should be notified when the control is selected by the user
    
    Throws:
    
    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
  - checkSubclass
```
protected void checkSubclass()
```
    Description copied from class: Widget
    
    Checks that this class can be subclassed.
    The SWT class library is intended to be subclassed only at specific, controlled points (most notably, Composite and Canvas when implementing new widgets). This method enforces this rule unless it is overridden.
    IMPORTANT: By providing an implementation of this method that allows a subclass of a class which does not normally allow subclassing to be created, the implementer agrees to be fully responsible for the fact that any such subclass will likely fail between SWT releases and will be strongly platform specific. No support is provided for user-written classes which are implemented in this fashion.
    The ability to subclass outside of the allowed SWT classes is intended purely to enable those not on the SWT development team to implement patches in order to get around specific limitations in advance of when those limitations can be addressed by the team. Subclassing should not be attempted without an intimate and detailed understanding of the hierarchy.
    
    Overrides:
    
    checkSubclass in class Item
  - 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.
    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
  - getParent
```
public Table getParent()
```
    Returns the receiver's parent, which must be a Table.
    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
  - getMoveable
```
public boolean getMoveable()
```
    Gets the moveable attribute. A column that is not moveable cannot be reordered by the user by dragging the header but may be reordered by the programmer.
    Returns:
    
    the moveable attribute
    
    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:
    
    3.1
    
    See Also:
    
    Table.getColumnOrder(), Table.setColumnOrder(int[]), setMoveable(boolean), SWT.Move
  - getResizable
```
public boolean getResizable()
```
    Gets the resizable attribute. A column that is not resizable cannot be dragged by the user but may be resized by the programmer.
    Returns:
    
    the resizable attribute
    
    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
  - getToolTipText
```
public 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
    
    Since:
    
    3.2
  - getWidth
```
public int getWidth()
```
    Gets the width of the receiver.
    Returns:
    
    the width
    
    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
  - pack
```
public void pack()
```
    Causes the receiver to be resized to its preferred size. For a composite, this involves computing the preferred size from its layout, if there is one.
    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
  - removeControlListener
```
public void removeControlListener(ControlListener listener)
```
    Removes the listener from the collection of listeners who will be notified when the control is moved or resized.
    Parameters:
    
    listener - the listener which should no longer be notified
    
    Throws:
    
    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:
    
    ControlListener, addControlListener(org.eclipse.swt.events.ControlListener)
  - 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:
    
    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)
  - setAlignment
```
public void setAlignment(int alignment)
```
    Controls how text and images will be displayed in the receiver. The argument should be one of LEFT, RIGHT or CENTER.
    Note that due to a restriction on some platforms, the first column is always left aligned.
    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
  - 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)
  - setMoveable
```
public void setMoveable(boolean moveable)
```
    Sets the moveable attribute. A column that is moveable can be reordered by the user by dragging the header. A column that is not moveable cannot be dragged by the user but may be reordered by the programmer.
    Parameters:
    
    moveable - the moveable attribute
    
    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:
    
    3.1
    
    See Also:
    
    Table.setColumnOrder(int[]), Table.getColumnOrder(), getMoveable(), SWT.Move
  - setResizable
```
public void setResizable(boolean resizable)
```
    Sets the resizable attribute. A column that is resizable can be resized by the user dragging the edge of the header. A column that is not resizable cannot be dragged by the user but may be resized by the programmer.
    Parameters:
    
    resizable - the resize attribute
    
    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(String string)
```
    Description copied from class: Item
    
    Sets the receiver's text.
    Note: If control characters like '\n', '\t' etc. are used in the string, then the behavior is platform dependent.
    
    Overrides:
    
    setText in class Item
    
    Parameters:
    
    string - the new text
  - setToolTipText
```
public void setToolTipText(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.
    
    NOTE: This operation is a hint and behavior is platform specific, on Windows for CJK-style mnemonics of the form " (&C)" at the end of the tooltip text are not shown in tooltip.
    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
    
    Since:
    
    3.2
  - setWidth
```
public void setWidth(int width)
```
    Sets the width of the receiver.
    Parameters:
    
    width - the new width
    
    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

Class TableColumn

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Constructor Detail

TableColumn

TableColumn

Method Detail

addControlListener

addSelectionListener

checkSubclass

getAlignment

getParent

getMoveable

getResizable

getToolTipText

getWidth

pack

removeControlListener

removeSelectionListener

setAlignment

setImage

setMoveable

setResizable

setText

setToolTipText

setWidth