org.jdrawing
Class LayeredDrawingModel

java.lang.Object
  org.jdrawing.AbstractDrawingModel
      org.jdrawing.LayeredDrawingModel

All Implemented Interfaces:

DrawingModel

public class LayeredDrawingModel

extends AbstractDrawingModel

This implementation of DrawingModel interface allows user to specify layer for each element. Elements will be sorted by layer before painting

Constructor Summary

LayeredDrawingModel()

Method Summary

void	addElement(java.lang.Object element) Adds new element to the model at layer zero.
void	addElement(java.lang.Object element, int layer) Adds new element to the model at given layer.
java.util.Enumeration	elements() Returns an enumeration of the elements of this model.
int	getElementLayer(java.lang.Object element) Returns current layer of the element.
void	removeElement(java.lang.Object element) Remove element from the model.
void	setElementLayer(java.lang.Object element, int layer) Sets layer for element.
void	sortElements(java.lang.Object[] elements) Reorder elements to be in order suitable for painting. This implementation sorts elements by layer.
void	updateElement(java.lang.Object element) Notify all listeners that element has changed.

Methods inherited from class org.jdrawing.AbstractDrawingModel

addDrawingModelListener, fireElementsAdded, fireElementsChanged, fireElementsRemoved, fireModelChanged, getDrawingModelListeners, removeDrawingModelListener

Methods inherited from class java.lang.Object

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

Constructor Detail

LayeredDrawingModel

public LayeredDrawingModel()

Method Detail

addElement

public void addElement(java.lang.Object element)

Adds new element to the model at layer zero.

Parameters:

element - element to be added to the model

Throws:

java.lang.IllegalArgumentException - if element is null

addElement

public void addElement(java.lang.Object element,
                       int layer)

Adds new element to the model at given layer.

Parameters:

element - element to be added to the model

Throws:

java.lang.IllegalArgumentException - if the specified element is null

removeElement

public void removeElement(java.lang.Object element)

Remove element from the model.

Parameters:

element - element to be removed from the model

updateElement

public void updateElement(java.lang.Object element)

Notify all listeners that element has changed.

Parameters:

element - changed element

Throws:

java.lang.IllegalArgumentException - if element is null

elements

public java.util.Enumeration elements()

Description copied from interface: DrawingModel

Returns an enumeration of the elements of this model. The returned Enumeration object will generate all elements in this model. The elements will be generated by this enumeration in order suitable for painting.

Returns:

an enumeration of the elements of this model

sortElements

public void sortElements(java.lang.Object[] elements)

Reorder elements to be in order suitable for painting. This implementation sorts elements by layer.

Parameters:

elements - the elements to reorder

Throws:

java.lang.IllegalArgumentException - if elements is null

setElementLayer

public void setElementLayer(java.lang.Object element,
                            int layer)

Sets layer for element.

Parameters:

element - element to be moved to another layer

layer - new layer for the element

Throws:

java.lang.IllegalArgumentException - if element is null

getElementLayer

public int getElementLayer(java.lang.Object element)

Returns current layer of the element.

Returns:

current layer of the element

Throws:

java.lang.IllegalArgumentException - if element is null