Summary: Ctors | Methods | Inherited Methods | [Expand All]

public class

AsyncBoxView.ChildState

extends Object
implements Runnable

java.lang.Object
↳	javax.swing.text.AsyncBoxView.ChildState

Class Overview

A record representing the layout state of a child view. It is runnable as a task on another thread. All access to the child view that is based upon a read-lock on the model should synchronize on this object (i.e. The layout thread and the GUI thread can both have a read lock on the model at the same time and are not protected from each other). Access to a child view hierarchy is serialized via synchronization on the ChildState instance.

Summary

Public Constructors
	AsyncBoxView.ChildState(View v) Construct a child status.

Public Methods
View	getChildView() Fetch the child view this record represents
float	getMajorOffset() Get the offset along the major axis
float	getMajorSpan() What is the span along the major axis.
float	getMinorOffset() What is the offset along the minor axis
float	getMinorSpan() What is the span along the minor axis.
boolean	isLayoutValid() Has the child view been laid out.
void	preferenceChanged(boolean width, boolean height) Mark preferences changed for this child.
void	run() Update the child state.
void	setMajorOffset(float offs) This method should only be called by the ChildLocator, it is simply a convenient place to hold the cached location.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
final Class<?>	getClass() Returns the runtime class of this `Object`.
int	hashCode() Returns a hash code value for the object.
final void	notify() Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll() Wakes up all threads that are waiting on this object's monitor.
String	toString() Returns a string representation of the object.
final void	wait() Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
final void	wait(long timeout, int nanos) Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
final void	wait(long timeout) Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.

From interface java.lang.Runnable

Public Constructors

public AsyncBoxView.ChildState (View v)

Construct a child status. This needs to start out as fairly large so we don't falsely begin with the idea that all of the children are visible.

Public Methods

public View getChildView ()

Fetch the child view this record represents

public float getMajorOffset ()

Get the offset along the major axis

public float getMajorSpan ()

What is the span along the major axis.

public float getMinorOffset ()

What is the offset along the minor axis

public float getMinorSpan ()

What is the span along the minor axis.

public boolean isLayoutValid ()

Has the child view been laid out.

public void preferenceChanged (boolean width, boolean height)

Mark preferences changed for this child.

Parameters

width	true if the width preference has changed
height	true if the height preference has changed

public void run ()

Update the child state. This should be called by the thread that desires to spend time updating the child state (intended to be the layout thread).

This aquires a read lock on the associated document for the duration of the update to ensure the model is not changed while it is operating. The first thing to do would be to see if any work actually needs to be done. The following could have conceivably happened while the state was waiting to be updated:

The child may have been removed from the view hierarchy.
The child may have been updated by a higher priority operation (i.e. the child may have become visible).

public void setMajorOffset (float offs)

This method should only be called by the ChildLocator, it is simply a convenient place to hold the cached location.

Interfaces

Classes

Exceptions