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:

Popup

Constructors

PopupFactory

public PopupFactory()

Methods

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:

getPopup(java.awt.Component, java.awt.Component, int, int)

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 paramaters, 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