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Java Source Code / Java Documentation » Ajax » MyGWT » net.mygwt.ui.client.viewer

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

net.mygwt.ui.client.util .Observable

net.mygwt.ui.client.viewer .Viewer

All known Subclasses:   net.mygwt.ui.client.viewer .ColumnViewer,  net.mygwt.ui.client.viewer .TemplateViewer,  net.mygwt.ui.client.viewer .TreeViewer,  net.mygwt.ui.client.viewer .ListViewer,
Viewer
abstract public class Viewer extends Observable implements ISelectionProvider(Code)
A Viewer is a model-based adapter for a Widget. Supports custom sorting, filtering.

Field Summary
protected Object[] elements

protected Object input
     This viewer's input, or null if none.

Method Summary
abstract protected void add(Object elem)
     Adds the element.
public void addFilter(ViewerFilter filter)
     Adds the given filter to this viewer, and triggers refiltering and resorting of the elements.
public void addSelectionListener(ISelectionChangedListener listener)

public void applyFilters()
     Applies the viewer's filters.
protected Object[] filter(Object[] elements)
     Returns the result of running the given elements through the filters.
abstract public Widget findItem(Object elem)
     Finds the widget which represents the given element.
protected void fireSelectionChanged(SelectionChangedEvent se)
     Notifies any selection listeners that the viewer's selection has changed.
public Object[] getActiveElements()
     Returns the active elements in the order being displayed.
public IElementComparer getComparer()
     Returns the comparer to use for comparing elements, or null if none has been set.
public IContentProvider getContentProvider()
     Returns the viewer's content provider.
public Object[] getElements()

public ViewerFilter[] getFilters()
     Returns the viewer's filters.
public Object getInput()
     Returns the viewer's input.
public IBaseLabelProvider getLabelProvider()
     Returns the viewer's label provider.
protected Object getRoot()
     Returns the root element.
The default implementation of this framework method forwards to getInput.
abstract protected List getSelectedFromWidget()
     Retrieves the selection of the viewer.
public ISelection getSelection()
     Returns the current selection for this provider.
public ViewerSorter getSorter()
     Returns this viewer's sorter, or null if it does not have one.
abstract public Widget getWidget()
     Returns the primary widget associated with this viewer.
protected void hookWidget(Component widget)

abstract protected void insert(Object elem, int index)
     Inserts the element.
public boolean isFiltered(Object parent, Object elem)
     Returns true if the element is filtered.
abstract protected void onInputReceived(Object input)
     Internal hook method called when the input to this viewer is initially set or subsequently changed.
protected void preserveSelections(ISelection selection)

public void refresh()
     Refreshes this viewer completely with information freshly obtained from this viewer's model.
abstract public void remove(Object elem)
     Removes the element.
protected void removeElement(Object elem)

public void removeFilter(ViewerFilter filter)
     Removes the given filter from this viewer, and triggers refiltering and resorting of the elements if required.
public void removeSelectionListener(ISelectionChangedListener listener)

public void setComparer(IElementComparer comparer)
     Sets the comparer to use for comparing elements, or null to use the default equals and hashCode methods on the elements themselves.
public void setContentProvider(IContentProvider contentProvider)
     Sets the viewer's content provider.
public void setInput(Object input)
     Sets the viewer's input.
public void setLabelProvider(IBaseLabelProvider labelProvider)
     Sets the viewer's label provider.
public void setSelection(ISelection selection)
     The viewer implementation of this ISelectionProvider method make the new selection for this viewer without making it visible.
abstract public void setSelection(ISelection selection, boolean reveal)
     Sets a new selection for this viewer and optionally makes it visible.
public void setSorter(ViewerSorter sorter)
     Sets this viewer's sorter and triggers refiltering and resorting of this viewer's element.
protected Object[] sortElements(Object[] elements)

abstract public void update()
     Refreshes labels with information from the viewer's label provider.
abstract public void update(Object elem)
     Refreshes labels with information from the viewer's label provider.

Field Detail
elements
protected Object[] elements(Code)

input
protected Object input(Code)
This viewer's input, or null if none. The viewer's input provides the "model" for the viewer's content.

Method Detail
add
abstract protected void add(Object elem)(Code)
Adds the element.
Parameters:
  elem - the element to be added

addFilter
public void addFilter(ViewerFilter filter)(Code)
Adds the given filter to this viewer, and triggers refiltering and resorting of the elements.
Parameters:
  filter - the filter to be added

addSelectionListener
public void addSelectionListener(ISelectionChangedListener listener)(Code)

applyFilters
public void applyFilters()(Code)
Applies the viewer's filters.

filter
protected Object[] filter(Object[] elements)(Code)
Returns the result of running the given elements through the filters.
Parameters:
  elements - the elements to filter only the elements which all filters accept

findItem
abstract public Widget findItem(Object elem)(Code)
Finds the widget which represents the given element.
Parameters:
  elem - the element the corresponding widget, or null if none

fireSelectionChanged
protected void fireSelectionChanged(SelectionChangedEvent se)(Code)
Notifies any selection listeners that the viewer's selection has changed.
Parameters:
  se - the selection event

getActiveElements
public Object[] getActiveElements()(Code)
Returns the active elements in the order being displayed. the active elements

getComparer
public IElementComparer getComparer()(Code)
Returns the comparer to use for comparing elements, or null if none has been set. If specified, the viewer uses this to compare and hash elements rather than the elements' own equals and hashCode methods. the comparer to use for comparing elements or null

getContentProvider
public IContentProvider getContentProvider()(Code)
Returns the viewer's content provider. the content provider

getElements
public Object[] getElements()(Code)

getFilters
public ViewerFilter[] getFilters()(Code)
Returns the viewer's filters. the filters

getInput
public Object getInput()(Code)
Returns the viewer's input. the input

getLabelProvider
public IBaseLabelProvider getLabelProvider()(Code)
Returns the viewer's label provider. the label provider

getRoot
protected Object getRoot()(Code)
Returns the root element.
The default implementation of this framework method forwards to getInput. Override if the root element is different from the viewer's input element.
the root element, or null if none

getSelectedFromWidget
abstract protected List getSelectedFromWidget()(Code)
Retrieves the selection of the viewer. the list of selected elements

getSelection
public ISelection getSelection()(Code)
Returns the current selection for this provider. the current selection

getSorter
public ViewerSorter getSorter()(Code)
Returns this viewer's sorter, or null if it does not have one. a viewer sorter, or null if none

getWidget
abstract public Widget getWidget()(Code)
Returns the primary widget associated with this viewer. the widget which displays this viewer's content

hookWidget
protected void hookWidget(Component widget)(Code)

insert
abstract protected void insert(Object elem, int index)(Code)
Inserts the element.
Parameters:
  elem - the element
Parameters:
  index - the insert location

isFiltered
public boolean isFiltered(Object parent, Object elem)(Code)
Returns true if the element is filtered. Filtered elements will not be displayed by the viewer.
Parameters:
  parent - the parent element
Parameters:
  elem - the element to test true if the element is filtered

onInputReceived
abstract protected void onInputReceived(Object input)(Code)
Internal hook method called when the input to this viewer is initially set or subsequently changed.
Parameters:
  input - the new input

preserveSelections
protected void preserveSelections(ISelection selection)(Code)

refresh
public void refresh()(Code)
Refreshes this viewer completely with information freshly obtained from this viewer's model.

remove
abstract public void remove(Object elem)(Code)
Removes the element.
Parameters:
  elem - the element to be removed

removeElement
protected void removeElement(Object elem)(Code)

removeFilter
public void removeFilter(ViewerFilter filter)(Code)
Removes the given filter from this viewer, and triggers refiltering and resorting of the elements if required.
Parameters:
  filter - the filter to be removed

removeSelectionListener
public void removeSelectionListener(ISelectionChangedListener listener)(Code)

setComparer
public void setComparer(IElementComparer comparer)(Code)
Sets the comparer to use for comparing elements, or null to use the default equals and hashCode methods on the elements themselves.
Parameters:
  comparer - the comparer to use for comparing elements or null

setContentProvider
public void setContentProvider(IContentProvider contentProvider)(Code)
Sets the viewer's content provider.
Parameters:
  contentProvider - the new content provider

setInput
public void setInput(Object input)(Code)
Sets the viewer's input.
Parameters:
  input - the new input

setLabelProvider
public void setLabelProvider(IBaseLabelProvider labelProvider)(Code)
Sets the viewer's label provider.
Parameters:
  labelProvider - the new label provider

setSelection
public void setSelection(ISelection selection)(Code)
The viewer implementation of this ISelectionProvider method make the new selection for this viewer without making it visible.
This method is equivalent to setSelection(selection,false).

setSelection
abstract public void setSelection(ISelection selection, boolean reveal)(Code)
Sets a new selection for this viewer and optionally makes it visible.
Subclasses must implement this method.

Parameters:
  selection - the new selection
Parameters:
  reveal - true if the selection is to be made visible,and false otherwise

setSorter
public void setSorter(ViewerSorter sorter)(Code)
Sets this viewer's sorter and triggers refiltering and resorting of this viewer's element. Passing null turns sorting off.
Parameters:
  sorter - a viewer sorter, or null if none

sortElements
protected Object[] sortElements(Object[] elements)(Code)

update
abstract public void update()(Code)
Refreshes labels with information from the viewer's label provider.

update
abstract public void update(Object elem)(Code)
Refreshes labels with information from the viewer's label provider.
Parameters:
  elem - the element to be updated

Fields inherited from net.mygwt.ui.client.util.Observable
public EventTable eventTable(Code)(Java Doc)

Methods inherited from net.mygwt.ui.client.util.Observable
public void addListener(int eventType, Listener listener)(Code)(Java Doc)
public boolean fireEvent(int eventType)(Code)(Java Doc)
public boolean fireEvent(int eventType, BaseEvent be)(Code)(Java Doc)
public void removeAllListeners()(Code)(Java Doc)
public void removeListener(int eventType, Listener listener)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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