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

    Constructors
    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 Popups.
    static void
    setSharedInstance(PopupFactory factory)
    Sets the PopupFactory that will be used to obtain Popups.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • 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