bibliothek.gui.dock.util
Class AbstractWindowProvider

java.lang.Object
  bibliothek.gui.dock.util.AbstractWindowProvider

All Implemented Interfaces:

WindowProvider

Direct Known Subclasses:

ComponentWindowProvider, DirectWindowProvider, FocusedWindowProvider

public abstract class AbstractWindowProvider
extends Object
implements WindowProvider

An implementation of WindowProvider which adds support for WindowProviderListeners. This provider also observes the visibility state of the associated window. If subclasses should either call fireWindowChanged(Window) or updateVisibility() as soon as the window changes.

Author:

Benjamin Sigg

Field Summary

protected List<WindowProviderListener>

listeners list of known listeners

Constructor Summary

AbstractWindowProvider()

Method Summary

void	addWindowProviderListener(WindowProviderListener listener) Adds a new listener to this provider.
protected void	fireVisibilityChanged(boolean showing) Calls WindowProviderListener.visibilityChanged(WindowProvider, boolean) on all listeners known to this provider.
protected void	fireWindowChanged(Window window) Calls WindowProviderListener.windowChanged(WindowProvider, Window) on all listeners known to this provider.
protected boolean	hasListeners() Tells whether at least one WindowProviderListener is registered.
boolean	isShowing() Tells whether this WindowProvider represents a window that is visible.
protected WindowProviderListener[]	listeners() Gets a list of all known listeners.
void	removeWindowProviderListener(WindowProviderListener listener) Removes a listener from this provider
protected void	updateVisibility() Updates the visibility state and listeners that observe the visibility state.

Methods inherited from class java.lang.Object

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

Methods inherited from interface bibliothek.gui.dock.util.WindowProvider

searchWindow

Field Detail

listeners

protected List<WindowProviderListener> listeners

list of known listeners

Constructor Detail

AbstractWindowProvider

public AbstractWindowProvider()

Method Detail

updateVisibility

protected void updateVisibility()

Updates the visibility state and listeners that observe the visibility state.

fireWindowChanged

protected void fireWindowChanged(Window window)

Calls WindowProviderListener.windowChanged(WindowProvider, Window) on all listeners known to this provider.

Parameters:

window - the new window, might be null

fireVisibilityChanged

protected void fireVisibilityChanged(boolean showing)

Calls WindowProviderListener.visibilityChanged(WindowProvider, boolean) on all listeners known to this provider.

Parameters:

showing - the new state

listeners

protected WindowProviderListener[] listeners()

Gets a list of all known listeners.

Returns:

the list of listeners

hasListeners

protected boolean hasListeners()

Tells whether at least one WindowProviderListener is registered.

Returns:

whether this provider is monitored

addWindowProviderListener

public void addWindowProviderListener(WindowProviderListener listener)

Description copied from interface: WindowProvider

Adds a new listener to this provider. The listener should be called when the window provided by this object changes.

Specified by:

addWindowProviderListener in interface WindowProvider

Parameters:

listener - the new listener

removeWindowProviderListener

public void removeWindowProviderListener(WindowProviderListener listener)

Description copied from interface: WindowProvider

Removes a listener from this provider

Specified by:

removeWindowProviderListener in interface WindowProvider

Parameters:

listener - the listener to remove

isShowing

public boolean isShowing()

Description copied from interface: WindowProvider

Tells whether this WindowProvider represents a window that is visible. Under normal circumstances this method would return:
Window window = sarchWindow();
return window == null ? false : window.isShowing();
This method is explicitly allowed to return any value it likes. The result of this method does not have to correspond with reality.

Specified by:

isShowing in interface WindowProvider

Returns:

whether this providers window is visible or not