com.iizigo.text

Class TextTableContentProvider

java.lang.Object

com.iizigo.text.TextTableContentProvider

All Implemented Interfaces:

EventListener, IContentProvider, IStructuredContentProvider, ITreeContentProvider

public class TextTableContentProvider
extends Object
implements ITreeContentProvider, EventListener

A content provider for a StringMapProp.

Author:

Christopher Mindus

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPE_FROM_ORIGINAL Default type: the text IDs from edited table are the only ones shown.
static int	TYPE_INTERSECTION Intersection of all text types from all tables.
static int	TYPE_UNION Union of all text types from all tables.

Constructor Summary

Constructors

Constructor and Description
TextTableContentProvider() The StringMapProp being used for the table.

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes of this content provider.
Object[]	getChildren(Object parentElement) Returns the child elements of the given parent element.
Object[]	getElements(Object inputElement)
Object	getParent(Object element) Returns the parent for the given element, or null indicating that the parent can't be computed.
boolean	hasChildren(Object element) Returns whether the given element has children.
void	inputChanged(Viewer viewer, Object oldInput, Object newInput) Notifies this content provider that the given viewer's input has been switched to a different element.
void	onEvent(GEvent event) Called to process an event.
void	setType(int type) Sets the type of content: TYPE_*.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_FROM_ORIGINAL

public static final int TYPE_FROM_ORIGINAL

Default type: the text IDs from edited table are the only ones shown.

See Also:

Constant Field Values

TYPE_UNION

public static final int TYPE_UNION

Union of all text types from all tables.

See Also:

Constant Field Values

TYPE_INTERSECTION

public static final int TYPE_INTERSECTION

Intersection of all text types from all tables.

See Also:

Constant Field Values

Constructor Detail

TextTableContentProvider

public TextTableContentProvider()

The StringMapProp being used for the table.

Method Detail

setType

public void setType(int type)

Sets the type of content: TYPE_*.

onEvent

public void onEvent(GEvent event)

Called to process an event.

Specified by:

onEvent in interface EventListener

Parameters:

event - The event.

inputChanged

public void inputChanged(Viewer viewer,
                         Object oldInput,
                         Object newInput)

Notifies this content provider that the given viewer's input has been switched to a different element.

A typical use for this method is registering the content provider as a listener to changes on the new input (using model-specific means), and deregistering the viewer from the old input. In response to these change notifications, the content provider should update the viewer (see the add, remove, update and refresh methods on the viewers).

The viewer should not be updated during this call, as it might be in the process of being disposed.

Specified by:

inputChanged in interface IContentProvider

Parameters:

viewer - the viewer

oldInput - the old input element, or null if the viewer did not previously have an input

newInput - the new input element, or null if the viewer does not have an input. The new input must be a Object [] of EditorTextTable.

dispose

public void dispose()

Disposes of this content provider. This is called by the viewer when it is disposed.

The viewer should not be updated during this call, as it is in the process of being disposed.

Specified by:

dispose in interface IContentProvider

getElements

public Object[] getElements(Object inputElement)

NOTE: The returned array must not contain the given inputElement, since this leads to recursion issues in AbstractTreeViewer (see bug 9262).

Specified by:

getElements in interface IStructuredContentProvider

Specified by:

getElements in interface ITreeContentProvider

getChildren

public Object[] getChildren(Object parentElement)

Returns the child elements of the given parent element.

The difference between this method and IStructuredContentProvider.getElements is that getElements is called to obtain the tree viewer's root elements, whereas getChildren is used to obtain the children of a given parent element in the tree (including a root).

The result is not modified by the viewer.

Specified by:

getChildren in interface ITreeContentProvider

Parameters:

parentElement - the parent element

Returns:

an array of child elements

getParent

public Object getParent(Object element)

Returns the parent for the given element, or null indicating that the parent can't be computed. In this case the tree-structured viewer can't expand a given node correctly if requested.

Specified by:

getParent in interface ITreeContentProvider

Parameters:

element - the element

Returns:

the parent element, or null if it has none or if the parent cannot be computed

hasChildren

public boolean hasChildren(Object element)

Returns whether the given element has children.

Intended as an optimization for when the viewer does not need the actual children. Clients may be able to implement this more efficiently than getChildren.

Specified by:

hasChildren in interface ITreeContentProvider

Parameters:

element - the element

Returns:

true if the given element has children, and false if it has no children