Class PopupFactory

java.lang.Object

javax.swing.PopupFactory

public class PopupFactory extends Object

PopupFactory, as the name implies, is used to obtain instances of Popups. Popups are used to display a Component above all other Components in a particular containment hierarchy. The general contract is that once you have obtained a Popup from a PopupFactory, you must invoke hide on the Popup. The typical usage is:

  PopupFactory factory = PopupFactory.getSharedInstance();
  Popup popup = factory.getPopup(owner, contents, x, y);
  popup.show();
  ...
  popup.hide();

Since:

1.4

See Also:

Constructor Summary

Constructor	Description
`PopupFactory()`	Constructs a `PopupFactory`.

Method Summary

Modifier and Type	Method	Description
`Popup`	`getPopup(Component owner, Component contents, int x, int y)`	Creates a `Popup` for the Component `owner` containing the Component `contents`.
`protected Popup`	`getPopup(Component owner, Component contents, int x, int y, boolean isHeavyWeightPopup)`	Creates a `Popup` for the Component `owner` containing the Component `contents`.
`static PopupFactory`	`getSharedInstance()`	Returns the shared `PopupFactory` which can be used to obtain `Popup`s.
`static void`	`setSharedInstance(PopupFactory factory)`	Sets the `PopupFactory` that will be used to obtain `Popup`s.

Methods declared in class Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this 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 it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

PopupFactory

public PopupFactory()

Constructs a PopupFactory.

Method Details

setSharedInstance

public static void setSharedInstance(PopupFactory factory)

Sets the PopupFactory that will be used to obtain Popups. This will throw an IllegalArgumentException if factory is null.

Parameters:

factory - Shared PopupFactory

Throws:

IllegalArgumentException - if factory is null

See Also:

getSharedInstance

public static PopupFactory getSharedInstance()

Returns the shared PopupFactory which can be used to obtain Popups.

Returns:: Shared PopupFactory

getPopup

public Popup getPopup(Component owner, Component contents, int x, int y) throws IllegalArgumentException

Creates a Popup for the Component owner containing the Component contents. owner is used to determine which Window the new Popup will parent the Component the Popup creates to. A null owner implies there is no valid parent. x and y specify the preferred initial location to place the Popup at. Based on screen size, or other parameters, the Popup may not display at x and y.

Parameters:: owner - Component mouse coordinates are relative to, may be null; contents - Contents of the Popup; x - Initial x screen coordinate; y - Initial y screen coordinate
Returns:: Popup containing Contents
Throws:: IllegalArgumentException - if contents is null

getPopup

protected Popup getPopup(Component owner, Component contents, int x, int y, boolean isHeavyWeightPopup) throws IllegalArgumentException

Creates a Popup for the Component owner containing the Component contents. The window containing the component owner will be used as the parent window. A null owner implies there is no valid parent. x and y specify the preferred initial location to place the Popup at. Based on screen size, or other parameters, the Popup may not display at x and y. isHeavyWeightPopup specifies if the Popup will be heavyweight. Passing true will force the Popup type to be heavyweight, otherwise Popup type will be selected by Popup factory. Lightweight Popup windows are more efficient than heavyweight (native peer) windows, but lightweight and heavyweight components do not mix well in a GUI. This method is intended to be used only by PopupFactory sub-classes.

Parameters:: owner - Component mouse coordinates are relative to, may be null; contents - Contents of the Popup; x - Initial x screen coordinate; y - Initial y screen coordinate; isHeavyWeightPopup - true if Popup should be heavy weight, otherwise popup type will be selected by popup factory.
Returns:: Popup containing Contents
Throws:: IllegalArgumentException - if contents is null

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