incubator.net.xoetrope.xui
Class XApplicationContext

java.lang.Object
  incubator.net.xoetrope.xui.XApplicationContext

All Implemented Interfaces:

java.awt.event.WindowListener, java.util.EventListener, XPageDisplay

public class XApplicationContext
extends java.lang.Object
implements XPageDisplay, java.awt.event.WindowListener

Field Summary

protected boolean	bUseWindow true if a popup window is in use
protected int	clientHeight The height of the client area
protected int	clientWidth The width of the client area
protected java.lang.Class	defaultSourceClass The default model data source class
protected XDataSource	modelDataSource The model data source
protected XPageManager	pageMgr The page manager
protected XStartupObject	startupObject The Applet/Application/Startup instance

Constructor Summary

XApplicationContext(XStartupObject startObject, java.lang.String[] args)
A default constructor.

XApplicationContext(XStartupObject startObject, java.lang.String defTargetClass, java.lang.String[] args)
A default constructor.

Method Summary

protected void	addShutdownHook()
XContentHolder	addTarget(java.lang.String name, java.lang.Object constraint, int preferredWidth, int preferredHeight, java.util.Hashtable params) Add a new frame or target area to a frameset
java.lang.Object	displayPage(PageSupport page) Called when a page has been added or shown via the XPageManager.
java.lang.Object	displayPage(PageSupport pageObj, java.lang.String target) Called when a page has been added or shown via the XPageManager.
java.lang.Object	findTarget(java.lang.String target) Finds the target area for a page display request, this only applies to a frameset.
int	getClientHeight() Get the height of the main window.
int	getClientWidth() Get the width of the main window.
int	getNumTargets() Get the number of targets in the container
protected XPageLoader	getSecondaryClassLoader(java.lang.String packageName) Construct a new builder and set the default package.
java.lang.Object	getTarget(int idx) Get the target for a page display request.
void	hidePage(XPage page) Remove the page from container.
void	init() Invoked when used as an applet.
protected void	initialise() Generic function which is called from the constructor if it's an application or from start if its an applet.
protected void	register() Load the componentFactories by reading the factory names from the startup file.
void	removeAllTargets() Remove all frames/targets from the current frameset
protected void	setContent() Load the content into the model.
void	setDefaultDataSource(java.lang.String className) Sets the default datasource class.
void	setDefaultTargetClass(java.lang.String clsName) Set the name of the default target class
void	setHome() Set the home page using the startup properties.
protected void	setResourceFile(java.lang.String startFile) Setup the default resource file for the application and load some of the information in it.
protected void	setup(java.lang.String[] args) Setup the applet by setting paths and then initializing the applet.
void	windowActivated(java.awt.event.WindowEvent e) Template method, unused at present
void	windowClosed(java.awt.event.WindowEvent e) Template method, unused at present
void	windowClosing(java.awt.event.WindowEvent e) Exit the application
void	windowDeactivated(java.awt.event.WindowEvent e) Template method, unused at present
void	windowDeiconified(java.awt.event.WindowEvent e) Template method, unused at present
void	windowIconified(java.awt.event.WindowEvent e) Template method, unused at present
void	windowOpened(java.awt.event.WindowEvent e) Template method, unused at present

Methods inherited from class java.lang.Object

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

Field Detail

pageMgr

protected XPageManager pageMgr

The page manager

bUseWindow

protected boolean bUseWindow

true if a popup window is in use

modelDataSource

protected XDataSource modelDataSource

The model data source

defaultSourceClass

protected java.lang.Class defaultSourceClass

The default model data source class

startupObject

protected XStartupObject startupObject

The Applet/Application/Startup instance

clientWidth

protected int clientWidth

The width of the client area

clientHeight

protected int clientHeight

The height of the client area

Constructor Detail

XApplicationContext

public XApplicationContext(XStartupObject startObject,
                           java.lang.String[] args)

A default constructor. Most of the setup work is actually done by the initialize method and is called by the main method or the init method depending on whether or not an application of applet is being launched.

XApplicationContext

public XApplicationContext(XStartupObject startObject,
                           java.lang.String defTargetClass,
                           java.lang.String[] args)

A default constructor. Most of the setup work is actually done by the initialize method and is called by the main method or the init method depending on whether or not an application of applet is being launched.

Method Detail

setup

protected void setup(java.lang.String[] args)

Setup the applet by setting paths and then initializing the applet. This method is a stand-in for the main method, processing the commandline parameters, so that its work is reusable and does not needed to be redone by derived classes. This method should not be called directly by user code.

Parameters:

args - the command line arguments

getSecondaryClassLoader

protected XPageLoader getSecondaryClassLoader(java.lang.String packageName)

Construct a new builder and set the default package. XUI sometimes uses additional class loaders to find the resources needed in a project. By default XUI uses the XuiBuilder class loader to convert XML files to Java classes.

A custom class loader can be referenced in the startup properties file using the 'BuilderClass' property. Once this property has been determined this method will instantiate an instance of that class if necessary.

Parameters:

packageName - the name of the default widget package e.g. net.xoetrope.awt, this is normally defined as a result of choosing the appropriate version of the XApplet class

Returns:

the page (page class instance) loader instance

setDefaultDataSource

public void setDefaultDataSource(java.lang.String className)

Sets the default datasource class. The default data source will be used to provide any initial data for the XModel. Normally this data is static data that will be used to populate things like lists and provide default values.

Parameters:

className - the name of the datasource class e.g. net.xoetrope.data.XDataSource.class, this class reads data from an XML file

setResourceFile

protected void setResourceFile(java.lang.String startFile)

Setup the default resource file for the application and load some of the information in it. The resource file is the startup properties file

Parameters:

startFile - The name of the file to be loaded, by default startup.properties

init

public void init()

Invoked when used as an applet. Sets up the startup file and initialises the application. Reads the applet parameters and calls initialize.

initialise

protected void initialise()

Generic function which is called from the constructor if it's an application or from start if its an applet.

The initialization process proceeds in the following order

1. Register the component factories
2. Setup the project class
3. Setup the page manager
4. Setup the resource manager
5. Setup the style manager
6. Size the main window
7. Set the layout
8. Add a shutdown hook
9. Display the main window

the style manager

addShutdownHook

protected void addShutdownHook()

register

protected void register()

Load the componentFactories by reading the factory names from the startup file. The value of the 'NumComponentFactories' is first read and then the value of ComponentFactory (i.e. ComponentFactory0, ComponentFactory1) where is the number, starting at zero, of the factory. Each factory is then instantiated and will be called upon to construct components in the order in which the factories were registered.

setContent

protected void setContent()

Load the content into the model. In the process an instance of the default model data source class is instantiated and reads data from a file pointed to by the 'ModelData' startup parameter.

setHome

public void setHome()

Set the home page using the startup properties. The home page is established by combining the two startup properties 'StartPackage' and 'StartClass'. By default 'StartClass' is set to a value of 'home. Both startup parameters are optional. Load the first page for the application.

displayPage

public java.lang.Object displayPage(PageSupport page)

Called when a page has been added or shown via the XPageManager. The page manager then requests that the applet/application then displays the page in the appropriate location.

Specified by:

displayPage in interface XPageDisplay

Parameters:

page - The XPage which has been loaded.

Returns:

the page being displayed

displayPage

public java.lang.Object displayPage(PageSupport pageObj,
                                    java.lang.String target)

Called when a page has been added or shown via the XPageManager. The page manager then requests that the applet/application then displays the page in the appropriate location.

The sequence with which the page transition occurs is as follows:

Find the appropriate target area

Ask the page to make its components non visible (to avoid flicker during the page update)

Set the page size

Save the current page's data by calling 'saveBoundComponentValues

Mark the current page as deactivated, and call the page's deactivated() method

Remove the old page from the container

Add the new page

Update the new page's bindings by calling updateBindings()

Update the new page's data by calling updateBoundComponentValues()

Layout the container and request it to repaint

Show the new page

Mark the new page as activated, and call its pageActivated method

Specified by:

displayPage in interface XPageDisplay

Parameters:

pageObj - the page to display

target - the area to update

Returns:

the page being displayed

hidePage

public void hidePage(XPage page)

Remove the page from container. The page is simply removed and the container validated.

Parameters:

page - the page to hide

findTarget

public java.lang.Object findTarget(java.lang.String target)

Finds the target area for a page display request, this only applies to a frameset. If there is no frameset the main area or default area is named 'content' and this area is used if null is used as the target name.

Specified by:

findTarget in interface XPageDisplay

Parameters:

target - the target area name

Returns:

the container to be updated

getTarget

public java.lang.Object getTarget(int idx)

Get the target for a page display request. The target areas are stored in the order in which they were declared or added.

Specified by:

getTarget in interface XPageDisplay

Parameters:

idx - the target area

Returns:

the container to be updated

getNumTargets

public int getNumTargets()

Get the number of targets in the container

Specified by:

getNumTargets in interface XPageDisplay

Returns:

the number of targets

addTarget

public XContentHolder addTarget(java.lang.String name,
                                java.lang.Object constraint,
                                int preferredWidth,
                                int preferredHeight,
                                java.util.Hashtable params)

Add a new frame or target area to a frameset

Specified by:

addTarget in interface XPageDisplay

Parameters:

name - the frame name

constraint - the BorderlayoutConstraint

preferredWidth - the preferred width

preferredHeight - the preferred height

params - extra parameters for the target

Returns:

the selected target

removeAllTargets

public void removeAllTargets()

Remove all frames/targets from the current frameset

Specified by:

removeAllTargets in interface XPageDisplay

setDefaultTargetClass

public void setDefaultTargetClass(java.lang.String clsName)

Set the name of the default target class

Parameters:

clsName - the class name

windowClosing

public void windowClosing(java.awt.event.WindowEvent e)

Exit the application

Specified by:

windowClosing in interface java.awt.event.WindowListener

Parameters:

e - the window event

getClientWidth

public int getClientWidth()

Get the width of the main window. Retrieved from the startup file or defaulted

Returns:

the client width

getClientHeight

public int getClientHeight()

Get the height of the main window. Retrieved from the startup file or defaulted

Returns:

the client height

windowActivated

public void windowActivated(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowActivated in interface java.awt.event.WindowListener

Parameters:

e - the window event

windowClosed

public void windowClosed(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowClosed in interface java.awt.event.WindowListener

Parameters:

e - the window event

windowDeiconified

public void windowDeiconified(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowDeiconified in interface java.awt.event.WindowListener

Parameters:

e - the window event

windowDeactivated

public void windowDeactivated(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowDeactivated in interface java.awt.event.WindowListener

Parameters:

e - the window event

windowIconified

public void windowIconified(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowIconified in interface java.awt.event.WindowListener

Parameters:

e - the window event

windowOpened

public void windowOpened(java.awt.event.WindowEvent e)

Template method, unused at present

Specified by:

windowOpened in interface java.awt.event.WindowListener

Parameters:

e - the window event