org.eclipse.eavp.viz.service.geometry.widgets

Class ShapeTreeContentProvider

java.lang.Object

org.eclipse.eavp.viz.service.geometry.widgets.ShapeTreeContentProvider

All Implemented Interfaces:

org.eclipse.jface.viewers.IContentProvider, org.eclipse.jface.viewers.IStructuredContentProvider, org.eclipse.jface.viewers.ITreeContentProvider

public class ShapeTreeContentProvider
extends java.lang.Object
implements org.eclipse.jface.viewers.ITreeContentProvider

Provides IShape objects for a TreeViewer, given a parent IShape

Author:

Andrew P. Belt

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ShapeTreeContentProvider.BlankShape The blank state item to display in the shape TreeViewer when a ComplexShape has no children

Constructor Summary

Constructors

Constructor and Description
ShapeTreeContentProvider(IRenderElementHolder holder) The default constructor.

Method Summary

Modifier and Type	Method and Description
void	dispose() (non-Javadoc)
java.lang.Object[]	getChildren(java.lang.Object parentShape) Returns the child shapes of the given parent shape, if any
java.lang.Object[]	getElements(java.lang.Object inputElement) Returns the child shape elements of a root GeometryComponent when the input of the shape TreeViewer is set or reset
java.lang.Object	getParent(java.lang.Object element) Returns the parent of the element if it exists
boolean	hasChildren(java.lang.Object element) Returns whether the given element has children
void	inputChanged(org.eclipse.jface.viewers.Viewer viewer, java.lang.Object oldInput, java.lang.Object newInput) (non-Javadoc)
void	setRenderElementHolder(IRenderElementHolder holder) Setter method for the holder from which the content provider will pull IRenderElements.

Methods inherited from class java.lang.Object

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

Constructor Detail

ShapeTreeContentProvider

public ShapeTreeContentProvider(IRenderElementHolder holder)

The default constructor.

Parameters:

holder - The holder class for the render elements accessed by the provider.

Method Detail

setRenderElementHolder

public void setRenderElementHolder(IRenderElementHolder holder)

Setter method for the holder from which the content provider will pull IRenderElements.

Parameters:

holder -

getChildren

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

Returns the child shapes of the given parent shape, if any

If a PrimitiveShape, an empty ComplexShape, or null is passed, this operation returns an empty array of Objects.

Specified by:

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

Parameters:

parentShape -

The parent IShape element

Returns:

The child IShapes

getElements

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

Returns the child shape elements of a root GeometryComponent when the input of the shape TreeViewer is set or reset

Specified by:

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

Specified by:

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

Parameters:

inputElement -

The input GeometryComponent

Returns:

The child IShapes

getParent

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

Returns the parent of the element if it exists

Specified by:

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

Parameters:

element -

The child IShape

Returns:

The parent IShape

hasChildren

public boolean hasChildren(java.lang.Object element)

Returns whether the given element has children

In this implementation, there are no optimizations to quickly retrieve whether the element has children, so the array of child objects is found and counted.

Specified by:

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

Parameters:

element -

The IShape to check for children

Returns:

Represents whether the element has children

dispose

public void dispose()

(non-Javadoc)

Specified by:

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

See Also:

IContentProvider.dispose()

inputChanged

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

(non-Javadoc)

Specified by:

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

See Also:

IContentProvider.inputChanged(Viewer viewer, Object oldInput, Object newInput)