vgp.tutor.updatePanel

Class MyClass

java.lang.Object

jv.object.PsObject

vgp.tutor.updatePanel.MyClass

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsUpdateIf

public class MyClass
extends PsObject

Tutorial class for combined used of JavaView update mechanism and AWT 1.1 events.

Any subclass of PsObject may have an associated info panel for inspecting itself in an interactive panel. The info panel may either be supplied by a superclass, or by providing a panel whose class name has appended '_IP' to the name of the class which shall be inspected. In this tutorial, the base class is MyClass and its panel is MyClass_IP. Invoking the method getInfoPanel() returns an instance of the panel, as done in the main(String []), which can be inserted in a frame or in other panels. In JavaView, the panel is usually added to the control window.

The base class and its panel communicate via the methods update(Object) once the base class is registered in the panel as its parent. This registration is done in the super class PsObject after the first call of getInfoPanel().

Base class and its panel separate the data and the widget user interface. The base class contains the data and is usually embedded in a program, while the panel contains the widget representation. The panel is just attached to the base class and only accessible through it.

If multiple instances of an info panel are needed then one should use the method newInstance(PsPanel.INFO_EXT) to obtain and register new info panels. Advanced applications are advised to use this method.

See Also:

PsObject, PsUpdateIf, Serialized Form

Author:

Konrad Polthier

Version:

15.08.99, 1.00 revised (kp)
15.08.99, 1.00 created (kp)

Field Summary

Fields inherited from class jv.object.PsObject

HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

Constructors

Constructor and Description
MyClass() Constructor.

Method Summary

Modifier and Type	Method and Description
int	getSelectedTopic()
boolean	getState()
java.lang.String	getText()
java.lang.String[]	getTopics()
void	init() Set values of variables.
static void	main(java.lang.String[] args) Standalone application support.
void	setSelectedTopic(int ind)
void	setState(boolean flag)
void	setText(java.lang.String text)
boolean	update(java.lang.Object event) Update the class whenever a child has changed.

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, toString, updatePanels

Methods inherited from class java.lang.Object

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

Constructor Detail

MyClass

public MyClass()

Constructor.

Method Detail

init

public void init()

Set values of variables. Method is also used to reset the class.

Overrides:

init in class PsObject

update

public boolean update(java.lang.Object event)

Update the class whenever a child has changed. Method is usually invoked from the children.

Specified by:

update in interface PsUpdateIf

Overrides:

update in class PsObject

Parameters:

event - carries a lot of information

Returns:

true if event has been handled, otherwise false

See Also:

PsObject.setParent(PsUpdateIf), PsObject.getFather(), PsObject.addUpdateListener(PsUpdateIf)

getState

public boolean getState()

setState

public void setState(boolean flag)

getTopics

public java.lang.String[] getTopics()

getSelectedTopic

public int getSelectedTopic()

setSelectedTopic

public void setSelectedTopic(int ind)

getText

public java.lang.String getText()

setText

public void setText(java.lang.String text)

main

public static void main(java.lang.String[] args)

Standalone application support.