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Eclipse Platform
Release 3.0

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org.eclipse.compare.structuremergeviewer
Class DiffTreeViewer

java.lang.Object
  org.eclipse.jface.viewers.Viewer
      org.eclipse.jface.viewers.ContentViewer
          org.eclipse.jface.viewers.StructuredViewer
              org.eclipse.jface.viewers.AbstractTreeViewer
                  org.eclipse.jface.viewers.TreeViewer
                      org.eclipse.compare.structuremergeviewer.DiffTreeViewer

All Implemented Interfaces:

IInputProvider, IInputSelectionProvider, IPostSelectionProvider, ISelectionProvider

Direct Known Subclasses:

StructureDiffViewer

public class DiffTreeViewer

extends TreeViewer

A tree viewer that works on objects implementing the IDiffContainer and IDiffElement interfaces.

This class may be instantiated; it is not intended to be subclassed outside this package.

See Also:

IDiffContainer, IDiffElement

Field Summary

Fields inherited from class org.eclipse.jface.viewers.AbstractTreeViewer

ALL_LEVELS

Fields inherited from class org.eclipse.jface.viewers.Viewer

WIDGET_DATA_KEY

Constructor Summary

DiffTreeViewer(Composite parent, CompareConfiguration configuration)
Creates a new viewer under the given SWT parent and with the specified configuration.

DiffTreeViewer(Tree tree, CompareConfiguration configuration)
Creates a new viewer for the given SWT tree control with the specified configuration.

Method Summary

protected void	copyOne(ICompareInput node, boolean leftToRight) Called to copy one side of the given node to the other.
protected void	copySelected(boolean leftToRight) Copies one side of all DiffNodes in the current selection to the other side.
protected void	createToolItems(ToolBarManager toolbarManager) This factory method is called after the viewer's controls have been created.
protected boolean	dontExpand(Object o) This hook method is called from within internalExpandToLevel to control whether a given model node should be expanded or not.
protected void	expandSelection() Expands to infinity all items in the selection.
protected void	fillContextMenu(IMenuManager manager) This method is called to add actions to the viewer's context menu.
protected ResourceBundle	getBundle() Returns the resource bundle.
CompareConfiguration	getCompareConfiguration() Returns the compare configuration of this viewer.
String	getTitle() Returns the viewer's name.
protected void	handleDispose(DisposeEvent event) Called on the viewer disposal.
protected void	initialSelection() This hook method is called from within inputChanged after a new input has been set but before any controls are updated.
protected void	inputChanged(Object in, Object oldInput) Internal hook method called when the input to this viewer is initially set or subsequently changed.
protected void	internalExpandToLevel(Widget node, int level) Overridden to avoid expanding DiffNodes that shouldn't expand.
protected void	navigate(boolean next) Selects the next (or previous) node of the current selection.
protected void	propertyChange(PropertyChangeEvent event) Tracks property changes of the configuration object.

Methods inherited from class org.eclipse.jface.viewers.TreeViewer

addTreeListener, doUpdateItem, getChildren, getControl, getExpanded, getItem, getItemCount, getItemCount, getItems, getLabelProvider, getParentItem, getSelection, getTree, newItem, removeAll, setExpanded, setLabelProvider, setSelection, showItem

Methods inherited from class org.eclipse.jface.viewers.AbstractTreeViewer

add, add, addSelectionListener, addTreeListener, associate, collapseAll, collapseToLevel, createChildren, createTreeItem, disassociate, doFindInputItem, doFindItem, doUpdateItem, expandAll, expandToLevel, expandToLevel, fireTreeCollapsed, fireTreeExpanded, getAutoExpandLevel, getExpandedElements, getExpandedState, getNextItem, getPreviousItem, getRawChildren, getSelectionFromWidget, getVisibleExpandedElements, handleTreeCollapse, handleTreeExpand, hookControl, indexForElement, internalCollapseToLevel, internalExpand, internalRefresh, internalRefresh, isExpandable, labelProviderChanged, remove, remove, removeTreeListener, reveal, scrollDown, scrollUp, setAutoExpandLevel, setContentProvider, setExpandedElements, setExpandedState, setSelectionToWidget, updateChildren, updatePlus

Methods inherited from class org.eclipse.jface.viewers.StructuredViewer

addDoubleClickListener, addDragSupport, addDropSupport, addFilter, addOpenListener, addPostSelectionChangedListener, assertElementsNotNull, equals, filter, findItem, fireDoubleClick, fireOpen, firePostSelectionChanged, getComparer, getFilteredChildren, getFilters, getRoot, getSelection, getSortedChildren, getSorter, handleDoubleSelect, handleInvalidSelection, handleLabelProviderChanged, handleOpen, handlePostSelect, handleSelect, hasFilters, mapElement, needsRefilter, preservingSelection, refresh, refresh, refresh, refresh, refreshItem, removeDoubleClickListener, removeFilter, removeOpenListener, removePostSelectionChangedListener, resetFilters, setComparer, setInput, setSelection, setSelectionToWidget, setSorter, setUseHashlookup, testFindItem, unmapAllElements, unmapElement, unmapElement, update, update, updateItem, updateSelection, usingElementMap

Methods inherited from class org.eclipse.jface.viewers.ContentViewer

getContentProvider, getInput

Methods inherited from class org.eclipse.jface.viewers.Viewer

addHelpListener, addSelectionChangedListener, fireHelpRequested, fireSelectionChanged, getData, handleHelpRequest, removeHelpListener, removeSelectionChangedListener, setData, setSelection

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.jface.viewers.ISelectionProvider

addSelectionChangedListener, removeSelectionChangedListener, setSelection

Constructor Detail

DiffTreeViewer

public DiffTreeViewer(Tree tree,
                      CompareConfiguration configuration)

Creates a new viewer for the given SWT tree control with the specified configuration.

Parameters:

tree - the tree control

configuration - the configuration for this viewer

DiffTreeViewer

public DiffTreeViewer(Composite parent,
                      CompareConfiguration configuration)

Creates a new viewer under the given SWT parent and with the specified configuration.

Parameters:

parent - the SWT control under which to create the viewer

configuration - the configuration for this viewer

Method Detail

getTitle

public String getTitle()

Returns the viewer's name.

Returns:

the viewer's name

getBundle

protected ResourceBundle getBundle()

Returns the resource bundle.

Returns:

the viewer's resource bundle

getCompareConfiguration

public CompareConfiguration getCompareConfiguration()

Returns the compare configuration of this viewer.

Returns:

the compare configuration of this viewer

handleDispose

protected void handleDispose(DisposeEvent event)

Called on the viewer disposal. Unregisters from the compare configuration. Clients may extend if they have to do additional cleanup.

Overrides:

handleDispose in class ContentViewer

Parameters:

event - a dispose event

propertyChange

protected void propertyChange(PropertyChangeEvent event)

Tracks property changes of the configuration object. Clients may extend to track their own property changes.

inputChanged

protected void inputChanged(Object in,
                            Object oldInput)

Description copied from class: Viewer

Internal hook method called when the input to this viewer is initially set or subsequently changed.

The default implementation does nothing. Subclassers may override this method to do something when a viewer's input is set. A typical use is populate the viewer.

Overrides:

inputChanged in class AbstractTreeViewer

initialSelection

protected void initialSelection()

This hook method is called from within inputChanged after a new input has been set but before any controls are updated. This default implementation calls navigate(true) to select and expand the first leaf node. Clients can override this method and are free to decide whether they want to call the inherited method.

Since:

2.0

internalExpandToLevel

protected void internalExpandToLevel(Widget node,
                                     int level)

Overridden to avoid expanding DiffNodes that shouldn't expand.

Overrides:

internalExpandToLevel in class AbstractTreeViewer

Parameters:

node - the widget

level - non-negative level, or ALL_LEVELS to collapse all levels of the tree

dontExpand

protected boolean dontExpand(Object o)

This hook method is called from within internalExpandToLevel to control whether a given model node should be expanded or not. This default implementation checks whether the object is a DiffNode and calls dontExpand() on it. Clients can override this method and are free to decide whether they want to call the inherited method.

Parameters:

o - the model object to be expanded

Returns:

false if a node should be expanded, true to prevent expanding

Since:

2.0

createToolItems

protected void createToolItems(ToolBarManager toolbarManager)

This factory method is called after the viewer's controls have been created. It installs four actions in the given ToolBarManager. Two actions allow for copying one side of a DiffNode to the other side. Two other actions are for navigating from one node to the next (previous).

Clients can override this method and are free to decide whether they want to call the inherited method.

Parameters:

toolbarManager - the toolbar manager for which to add the actions

fillContextMenu

protected void fillContextMenu(IMenuManager manager)

This method is called to add actions to the viewer's context menu. It installs actions for expanding tree nodes, copying one side of a DiffNode to the other side. Clients can override this method and are free to decide whether they want to call the inherited method.

Parameters:

manager - the menu manager for which to add the actions

expandSelection

protected void expandSelection()

Expands to infinity all items in the selection.

Since:

2.0

copySelected

protected void copySelected(boolean leftToRight)

Copies one side of all DiffNodes in the current selection to the other side. Called from the (internal) actions for copying the sides of a DiffNode. Clients may override.

Parameters:

leftToRight - if true the left side is copied to the right side. If false the right side is copied to the left side

copyOne

protected void copyOne(ICompareInput node,
                       boolean leftToRight)

Called to copy one side of the given node to the other. This default implementation delegates the call to ICompareInput.copy(...). Clients may override.

Parameters:

leftToRight - if true the left side is copied to the right side. If false the right side is copied to the left side

navigate

protected void navigate(boolean next)

Selects the next (or previous) node of the current selection. If there is no current selection the first (last) node in the tree is selected. Wraps around at end or beginning. Clients may override.

Parameters:

next - if true the next node is selected, otherwise the previous node