com.ibm.jdg2e.jface.viewers.provider.content
Class LocationsTreeContentProvider

java.lang.Object
  com.ibm.jdg2e.jface.viewers.provider.content.LocationsTreeContentProvider

All Implemented Interfaces:

java.util.EventListener, org.eclipse.jface.viewers.IContentProvider, org.eclipse.jface.util.IPropertyChangeListener, org.eclipse.jface.viewers.IStructuredContentProvider, org.eclipse.jface.viewers.ITreeContentProvider

public class LocationsTreeContentProvider

extends java.lang.Object

implements org.eclipse.jface.viewers.ITreeContentProvider, org.eclipse.jface.util.IPropertyChangeListener

Example of a content provider that works for a tree viewer.

Constructor Summary

LocationsTreeContentProvider()

Method Summary

void	dispose() Clean up refs
java.lang.Object[]	getChildren(java.lang.Object parentElement) Returns any child objects for the given element.
java.lang.Object[]	getElements(java.lang.Object inputElement)
java.lang.Object	getParent(java.lang.Object element) Gets the parent for a given element.
boolean	hasChildren(java.lang.Object element) Identifies when a given element has children.
void	inputChanged(org.eclipse.jface.viewers.Viewer viewer, java.lang.Object oldInput, java.lang.Object newInput) Reacts to a change in input.
void	propertyChange(org.eclipse.jface.util.PropertyChangeEvent event) Listen for and then respond to changes in the input (RoadTrip) model.

Methods inherited from class java.lang.Object

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

Constructor Detail

LocationsTreeContentProvider

public LocationsTreeContentProvider()

Method Detail

dispose

public void dispose()

Clean up refs

Specified by:

dispose in interface org.eclipse.jface.viewers.IContentProvider

See Also:

IContentProvider.dispose()

getChildren

public java.lang.Object[] getChildren(java.lang.Object parentElement)

Returns any child objects for the given element. This implementation finds locations for a given political type.

Specified by:

getChildren in interface org.eclipse.jface.viewers.ITreeContentProvider

See Also:

ITreeContentProvider.getChildren(java.lang.Object)

getElements

public java.lang.Object[] getElements(java.lang.Object inputElement)

Specified by:

getElements in interface org.eclipse.jface.viewers.IStructuredContentProvider

See Also:

IStructuredContentProvider.getElements(java.lang.Object)

getParent

public java.lang.Object getParent(java.lang.Object element)

Gets the parent for a given element. Not needed for this implementation.

Specified by:

getParent in interface org.eclipse.jface.viewers.ITreeContentProvider

See Also:

ITreeContentProvider.getParent(java.lang.Object)

hasChildren

public boolean hasChildren(java.lang.Object element)

Identifies when a given element has children. If it is a location the answer is false.

Specified by:

hasChildren in interface org.eclipse.jface.viewers.ITreeContentProvider

See Also:

ITreeContentProvider.hasChildren(java.lang.Object)

inputChanged

public void inputChanged(org.eclipse.jface.viewers.Viewer viewer,
                         java.lang.Object oldInput,
                         java.lang.Object newInput)

Reacts to a change in input. In this example implementation the input never changes so this only called to initialize the input reference for the first time and when the viewer is being disposed.

Specified by:

inputChanged in interface org.eclipse.jface.viewers.IContentProvider

See Also:

IContentProvider.inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)

propertyChange

public void propertyChange(org.eclipse.jface.util.PropertyChangeEvent event)

Listen for and then respond to changes in the input (RoadTrip) model.

Specified by:

propertyChange in interface org.eclipse.jface.util.IPropertyChangeListener

See Also:

IPropertyChangeListener.propertyChange(org.eclipse.jface.util.PropertyChangeEvent)